* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ============================================================
   THEME SYSTEM
   default = white/light (original)
   blue    = dark navy blue
   dark    = dark black cyber
   gray    = dark gray
   ============================================================ */

/* --- Default / White theme (base variables) --- */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e8eaed;
    --bg-input: #ffffff;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-muted: #9aa0a6;
    --accent: #0066cc;
    --accent-hover: #0055aa;
    --accent-dim: rgba(0, 102, 204, 0.1);
    --border: #e0e0e0;
    --success: #34a853;
    --error: #ea4335;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --font-mono: 'Consolas', 'Menlo', 'DejaVu Sans Mono', 'Courier New', monospace;
    --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans CJK SC', Roboto, sans-serif;
    /* new layout vars */
    --panel-bg: rgba(255,255,255,0.98);
    --header-bg: rgba(255,255,255,0.98);
    --sidebar-bg: rgba(248,249,250,0.98);
    --cyber-primary: #0066cc;
    --cyber-border: rgba(0,102,204,0.25);
    --grid-color: rgba(0,102,204,0.05);
    --nav-active-bg: rgba(0,102,204,0.10);
    --floating-bg: rgba(255,255,255,0.97);
    --right-sidebar-bg: rgba(248,249,250,0.98);
    --highlight-bg: #ffe066;
    --highlight-color: #333;
    --scroll-to-top-btn-bottom: 170px;
    --scroll-to-bottom-btn-bottom: 130px;
    --star-active: #f59e0b;
    --star-inactive: var(--text-muted);
}

.star-active-icon { color: var(--star-active); }
.star-inactive-icon { color: var(--star-inactive); opacity: 0.4; }

/* --- Blue theme --- */
[data-theme="blue"] {
    --bg-primary: #0d1b2e;
    --bg-secondary: #0a1628;
    --bg-tertiary: #0f2040;
    --bg-input: #0d1b2e;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #4da6ff;
    --accent-hover: #3d96ef;
    --accent-dim: rgba(77,166,255,0.15);
    --border: rgba(77,166,255,0.2);
    --success: #34d399;
    --error: #f87171;
    --shadow: 0 1px 4px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
    --panel-bg: rgba(10,22,40,0.92);
    --header-bg: rgba(10,22,40,0.95);
    --sidebar-bg: rgba(8,18,36,0.95);
    --cyber-primary: #4da6ff;
    --cyber-border: rgba(77,166,255,0.3);
    --grid-color: rgba(77,166,255,0.07);
    --nav-active-bg: rgba(77,166,255,0.12);
    --floating-bg: rgba(10,22,40,0.97);
    --right-sidebar-bg: rgba(8,18,36,0.95);
    --highlight-bg: rgba(77,166,255,0.3);
    --highlight-color: #e2e8f0;
}
[data-theme="dark"] {
    --bg-primary: #0a0a0f;
    --bg-secondary: #0f0f18;
    --bg-tertiary: #15151f;
    --bg-input: #0a0a0f;
    --text-primary: #e0e0e8;
    --text-secondary: #9090a8;
    --text-muted: #606080;
    --accent: #00f0ff;
    --accent-hover: #00d8e8;
    --accent-dim: rgba(0,240,255,0.12);
    --border: rgba(0,240,255,0.2);
    --success: #00ff88;
    --error: #ff4466;
    --shadow: 0 1px 4px rgba(0,0,0,0.6);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.7);
    --panel-bg: rgba(15,15,25,0.9);
    --header-bg: rgba(10,10,15,0.95);
    --sidebar-bg: rgba(8,8,14,0.95);
    --cyber-primary: #00f0ff;
    --cyber-border: rgba(0,240,255,0.25);
    --grid-color: rgba(0,240,255,0.05);
    --nav-active-bg: rgba(0,240,255,0.10);
    --floating-bg: rgba(10,10,15,0.97);
    --right-sidebar-bg: rgba(8,8,14,0.95);
    --highlight-bg: rgba(0,240,255,0.25);
    --highlight-color: #e0e0e8;
    --bg-code: #1a1a2e;
    --text-code: #cdd6f4;
    --border-code: #45475a;
}
[data-theme="gray"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #222222;
    --bg-tertiary: #2a2a2a;
    --bg-input: #1a1a1a;
    --text-primary: #d0d0d0;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent: #aaaaaa;
    --accent-hover: #cccccc;
    --accent-dim: rgba(170,170,170,0.12);
    --border: rgba(150,150,150,0.25);
    --success: #60c060;
    --error: #e06060;
    --shadow: 0 1px 4px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.6);
    --panel-bg: rgba(30,30,30,0.92);
    --header-bg: rgba(25,25,25,0.97);
    --sidebar-bg: rgba(20,20,20,0.97);
    --cyber-primary: #888888;
    --cyber-border: rgba(136,136,136,0.3);
    --grid-color: rgba(136,136,136,0.06);
    --nav-active-bg: rgba(136,136,136,0.12);
    --floating-bg: rgba(25,25,25,0.97);
    --right-sidebar-bg: rgba(20,20,20,0.97);
    --highlight-bg: rgba(170,170,170,0.25);
    --highlight-color: #d0d0d0;
}

/* Theme transition */
body, .header, .sidebar, .right-sidebar, .floating-input-bar,
.theme-dropdown-menu, .right-sidebar-inner, .fullscreen-modal-inner {
    transition: background-color 0.35s ease, border-color 0.35s ease, color 0.35s ease;
}

/* Theme flash overlay */
.theme-flash-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; z-index: 99999; opacity: 0;
    background: radial-gradient(circle at center, var(--cyber-primary) 0%, transparent 70%);
    transition: opacity 0.6s ease;
}
.theme-flash-overlay.active { opacity: 0.12; }

/* Cyber background grid */
.cyber-grid {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    pointer-events: none; z-index: 0;
}
@keyframes gridMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(50px); }
}
/* Scanlines */
.scanlines {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom,
        rgba(255,255,255,0), rgba(255,255,255,0) 50%,
        rgba(0,0,0,0.04) 50%, rgba(0,0,0,0.04));
    background-size: 100% 4px;
    pointer-events: none; z-index: 2; opacity: 0.2;
}
/* hide heavy effects in default/light theme */
:root .cyber-grid { opacity: 0.6; }
:root .scanlines { opacity: 0.05; }
[data-theme="dark"] .cyber-grid { opacity: 1; }
[data-theme="dark"] .scanlines { opacity: 0.3; }
[data-theme="blue"] .cyber-grid { opacity: 0.9; }
[data-theme="blue"] .scanlines { opacity: 0.15; }
[data-theme="gray"] .cyber-grid { opacity: 0.8; }
[data-theme="gray"] .scanlines { opacity: 0.2; }

/* Corner accents */
.corner-accent {
    position: absolute; width: 16px; height: 16px;
    border: 2px solid var(--cyber-border); pointer-events: none; z-index: 5;
}
.corner-tl { top: 4px; left: 4px; border-right: 0; border-bottom: 0; }
.corner-tr { top: 4px; right: 4px; border-left: 0; border-bottom: 0; }
.corner-bl { bottom: 4px; left: 4px; border-right: 0; border-top: 0; }
.corner-br { bottom: 4px; right: 4px; border-left: 0; border-top: 0; }

body {
    font-family: var(--font-ui);
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
    z-index: 10;
}

/* ===== HEADER ===== */
.header {
    display: flex;
    align-items: center;
    padding: 0 16px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--cyber-border);
    gap: 0;
    min-height: 56px;
    flex-shrink: 0;
    backdrop-filter: blur(12px);
    position: relative;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.header-logo {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    flex-shrink: 0;
}

.header-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--cyber-primary);
    text-shadow: 0 0 10px var(--cyber-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

/* white theme: no glow */
[data-theme="default"] .header-title {
    text-shadow: none;
}

.header-version {
    font-size: 11px;
    font-family: monospace;
    color: color-mix(in srgb, var(--cyber-primary) 60%, transparent);
    white-space: nowrap;
    flex-shrink: 0;
    margin-left: 6px;
    align-self: center;
    letter-spacing: 0.02em;
}

.header-nav-divider {
    width: 1px;
    height: 20px;
    background: var(--cyber-border);
    margin: 0 6px;
    flex-shrink: 0;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    overflow: hidden;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 10px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.18s;
    border: 1px solid transparent;
}
.nav-link:hover {
    color: var(--cyber-primary);
    background: var(--nav-active-bg);
}
/* nav-action: opens a modal/action, no persistent active state */
.nav-link.nav-action:hover {
    color: var(--cyber-primary);
    background: var(--nav-active-bg);
}
.nav-link.active {
    color: var(--cyber-primary);
    background: var(--nav-active-bg);
    border-color: var(--cyber-border);
}
.nav-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.header-divider {
    width: 1px;
    height: 20px;
    background: var(--cyber-border);
    flex-shrink: 0;
}

/* Header skill button — 原型 skill-btn 风格，渐变边框+扫光 */
.skill-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: linear-gradient(135deg, rgba(0,102,204,0.18), rgba(112,0,255,0.14));
    border: 1px solid var(--cyber-primary);
    border-radius: 6px;
    color: var(--cyber-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    flex-shrink: 0;
}
.skill-btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
    transition: left 0.5s;
}
.skill-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 16px var(--accent-dim);
}
.skill-btn:hover::before { left: 100%; }
[data-theme="dark"] .skill-btn {
    background: linear-gradient(135deg, rgba(0,240,255,0.18), rgba(112,0,255,0.14));
}
[data-theme="blue"] .skill-btn {
    background: linear-gradient(135deg, rgba(77,166,255,0.18), rgba(60,0,180,0.14));
}

/* Header icon button (compact) */
.header-icon-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
    transition: all 0.18s;
    display: flex;
    align-items: center;
}
.header-icon-btn:hover {
    color: var(--cyber-primary);
    background: var(--nav-active-bg);
    border-color: var(--cyber-border);
}

/* Theme dropdown */
.theme-dropdown { position: relative; z-index: 1000; }
.theme-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 10px;
    background: var(--accent-dim);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    color: var(--cyber-primary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.18s;
}
.theme-btn:hover { background: var(--nav-active-bg); }
.theme-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--panel-bg);
    border: 1px solid var(--cyber-border);
    border-radius: 8px;
    padding: 6px;
    min-width: 150px;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    z-index: 99999;
    display: none;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.theme-dropdown-menu.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}
.theme-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
    transition: background 0.15s;
}
.theme-option:hover { background: var(--nav-active-bg); color: var(--cyber-primary); }
.theme-option.active { background: var(--nav-active-bg); color: var(--cyber-primary); font-weight: 600; }
.theme-color-preview {
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(128,128,128,0.3);
    flex-shrink: 0;
}

/* conn dot / username */
.conn-dot {
    display: inline-block;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: #4caf50;
    transition: background 0.4s;
    flex-shrink: 0;
}
.conn-dot.offline { background: #f44336; }

/* User avatar in header */
.header-user-area {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 16px;
    margin-right: 4px;
    position: relative;
}
.header-username {
    font-size: 13px;
    color: var(--text-secondary);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.header-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg,#06b6d4,#3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255,255,255,0.15);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    flex-shrink: 0;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}
.header-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.header-avatar span {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    z-index: 1000;
}
.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.user-dropdown-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s;
    border-radius: 6px;
}
.user-dropdown-item:hover {
    background: var(--nav-active-bg);
}
.user-dropdown-item svg {
    flex-shrink: 0;
    opacity: 0.7;
}

/* Keep old .icon-btn for hamburger */
.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    padding: 7px;
    border-radius: 6px;
    transition: background 0.18s;
    display: flex;
    align-items: center;
}
.icon-btn:hover { background: var(--nav-active-bg); color: var(--cyber-primary); }

/* ===== MAIN 3-COLUMN CONTAINER ===== */
.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.3s ease, opacity 0.3s ease;
}

.sidebar.collapsed {
    width: 0;
    opacity: 0;
    overflow: hidden;
}

.sidebar.collapsed + .sidebar-resizer {
    display: none;
}

.sidebar-header {
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 700;
    color: var(--cyber-primary);
    border-bottom: 1px solid var(--cyber-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header-title {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--cyber-primary);
    font-size: 13px;
    font-weight: 700;
}

.sidebar-header-buttons {
    display: flex;
    gap: 4px;
}

.sidebar-collapse-btn,
.sidebar-refresh-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
}

.sidebar-collapse-btn:hover,
.sidebar-refresh-btn:hover {
    background: var(--bg-tertiary);
}

.sidebar-refresh-btn:active {
    animation: spin 0.5s ease-in-out;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.directory-tree {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.sidebar-search-wrap {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-search-wrap input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 12px;
    color: var(--text-primary);
    outline: none;
}

.sidebar-search-wrap input:focus {
    border-color: var(--accent);
}

.sidebar-search-clear {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    padding: 0 2px;
    display: none;
}

.sidebar-search-clear:hover {
    color: var(--text-primary);
}

/* Batch toolbar */
.batch-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: color-mix(in srgb, var(--accent) 10%, var(--bg-secondary));
    border-bottom: 1px solid var(--accent);
    flex-shrink: 0;
    flex-wrap: wrap;
}
.batch-toolbar .batch-count {
    font-size: 12px;
    color: var(--accent);
    font-weight: 600;
    flex: 1 1 auto;
}
.batch-toolbar button {
    font-size: 12px;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--accent);
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    white-space: nowrap;
}
.batch-toolbar button:hover {
    opacity: 0.85;
}
.batch-toolbar .batch-cancel-btn {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--border);
}
.batch-toolbar .batch-cancel-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

/* Multi-selected tree item */
.tree-item.selected {
    background: rgba(var(--accent-rgb, 26,115,232), 0.18);
    outline: 1px solid rgba(var(--accent-rgb, 26,115,232), 0.35);
    outline-offset: -1px;
}

.tree-item {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    cursor: pointer !important;
    user-select: none;
    font-size: 13px;
    transition: background 0.15s;
}

.tree-more-btn {
    display: none;
    margin-left: auto;
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    padding: 0 4px;
    border-radius: 3px;
}

.tree-more-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.tree-item:hover .tree-more-btn {
    display: block;
}

.tree-item:hover {
    background: var(--bg-tertiary);
}
.tree-item.directory {
    font-weight: 500;
}

.tree-item.directory.drag-over {
    background: var(--accent);
    color: #fff;
    border-radius: 4px;
}

.tree-item.drag-over {
    background: color-mix(in srgb, var(--accent) 20%, transparent);
    border-radius: 4px;
    outline: 1px dashed var(--accent);
}

.tree-children.drag-over {
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    outline: 1px dashed var(--accent);
    border-radius: 4px;
    min-height: 8px;
}

.directory-tree.drag-over-root {
    outline: 2px dashed var(--accent);
    outline-offset: -4px;
}

.tree-item.cut-pending {
    opacity: 0.45;
}

.tree-item.copy-pending {
    outline: 1px dashed var(--accent);
    outline-offset: -1px;
}

/* Expand chevron — on the directory item itself, before the icon */
.tree-item.directory::before {
    content: '\25B6';
    font-size: 7px;
    color: var(--text-secondary);
    margin-right: 3px;
    flex-shrink: 0;
    align-self: center;
    transition: transform 0.15s;
    line-height: 1;
}
.tree-item.directory.open::before {
    transform: rotate(90deg);
}

/* Tree icons — SVG background images (Win7-safe, no emoji) */
.tree-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    margin-right: 6px;
    display: inline-block;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    vertical-align: middle;
}

/* Folder closed */
.tree-item.directory .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 12'%3E%3Cpath d='M0 2.5C0 1.67.67 1 1.5 1H5l2 2h7.5c.83 0 1.5.67 1.5 1.5v6c0 .83-.67 1.5-1.5 1.5h-13C.67 12 0 11.33 0 10.5z' fill='%23C9956C'/%3E%3C/svg%3E");
}

/* Folder open */
.tree-item.directory.open .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 12'%3E%3Cpath d='M0 2.5C0 1.67.67 1 1.5 1H5l2 2h7.5c.83 0 1.5.67 1.5 1.5V7H0z' fill='%23C9956C'/%3E%3Cpath d='M0 7h16L14 12H2z' fill='%23DCB87A'/%3E%3C/svg%3E");
}

/* File */
.tree-item:not(.directory) .tree-icon {
    width: 13px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23EEF0F2' stroke='%23C0C4CC' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23C0C4CC' stroke-width='1'/%3E%3C/svg%3E");
}

/* Code files — blue */
.tree-item[data-ext="js"] .tree-icon,
.tree-item[data-ext="ts"] .tree-icon,
.tree-item[data-ext="jsx"] .tree-icon,
.tree-item[data-ext="tsx"] .tree-icon,
.tree-item[data-ext="mjs"] .tree-icon,
.tree-item[data-ext="cjs"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23DBEAFE' stroke='%2393C5FD' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%2393C5FD' stroke-width='1'/%3E%3C/svg%3E");
}
.tree-item[data-ext="py"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23FEF9C3' stroke='%23FDE047' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23FDE047' stroke-width='1'/%3E%3C/svg%3E");
}
.tree-item[data-ext="rs"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23FFEDD5' stroke='%23FB923C' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23FB923C' stroke-width='1'/%3E%3C/svg%3E");
}
.tree-item[data-ext="sh"] .tree-icon,
.tree-item[data-ext="bash"] .tree-icon,
.tree-item[data-ext="zsh"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23DCFCE7' stroke='%2386EFAC' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%2386EFAC' stroke-width='1'/%3E%3C/svg%3E");
}
.tree-item[data-ext="html"] .tree-icon,
.tree-item[data-ext="htm"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23FCE7F3' stroke='%23F9A8D4' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23F9A8D4' stroke-width='1'/%3E%3C/svg%3E");
}
.tree-item[data-ext="css"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23EDE9FE' stroke='%23C4B5FD' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23C4B5FD' stroke-width='1'/%3E%3C/svg%3E");
}
.tree-item[data-ext="json"] .tree-icon,
.tree-item[data-ext="toml"] .tree-icon,
.tree-item[data-ext="yaml"] .tree-icon,
.tree-item[data-ext="yml"] .tree-icon,
.tree-item[data-ext="xml"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23F0F9FF' stroke='%2338BDF8' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%2338BDF8' stroke-width='1'/%3E%3C/svg%3E");
}
/* Markdown / text */
.tree-item[data-ext="md"] .tree-icon,
.tree-item[data-ext="markdown"] .tree-icon,
.tree-item[data-ext="txt"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23F1F5F9' stroke='%2394A3B8' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%2394A3B8' stroke-width='1'/%3E%3C/svg%3E");
}
/* Image files — teal */
.tree-item[data-ext="png"] .tree-icon,
.tree-item[data-ext="jpg"] .tree-icon,
.tree-item[data-ext="jpeg"] .tree-icon,
.tree-item[data-ext="gif"] .tree-icon,
.tree-item[data-ext="svg"] .tree-icon,
.tree-item[data-ext="webp"] .tree-icon,
.tree-item[data-ext="ico"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23CCFBF1' stroke='%232DD4BF' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%232DD4BF' stroke-width='1'/%3E%3C/svg%3E");
}
/* Compressed / archive — amber */
.tree-item[data-ext="zip"] .tree-icon,
.tree-item[data-ext="tar"] .tree-icon,
.tree-item[data-ext="gz"] .tree-icon,
.tree-item[data-ext="rar"] .tree-icon,
.tree-item[data-ext="7z"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23FEF3C7' stroke='%23FCD34D' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23FCD34D' stroke-width='1'/%3E%3C/svg%3E");
}
/* PDF / Office docs — red */
.tree-item[data-ext="pdf"] .tree-icon,
.tree-item[data-ext="doc"] .tree-icon,
.tree-item[data-ext="docx"] .tree-icon,
.tree-item[data-ext="xls"] .tree-icon,
.tree-item[data-ext="xlsx"] .tree-icon,
.tree-item[data-ext="ppt"] .tree-icon,
.tree-item[data-ext="pptx"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23FEE2E2' stroke='%23FCA5A5' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23FCA5A5' stroke-width='1'/%3E%3C/svg%3E");
}
/* SQL / DB */
.tree-item[data-ext="sql"] .tree-icon,
.tree-item[data-ext="db"] .tree-icon,
.tree-item[data-ext="sqlite"] .tree-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 15'%3E%3Cpath d='M1 0h8l4 4v11H1z' fill='%23E0E7FF' stroke='%23818CF8' stroke-width='1'/%3E%3Cpath d='M9 0v4h4' fill='none' stroke='%23818CF8' stroke-width='1'/%3E%3C/svg%3E");
}

.tree-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-tree-name {
    white-space: normal;
    word-break: break-all;
    line-height: 1.4;
}

.search-dir-part {
    color: var(--text-muted);
    font-size: 11px;
}

.tree-children {
    padding-left: 20px;
}

/* Sidebar Overlay - hidden since sidebar is not absolute anymore */
.sidebar-overlay {
    display: none;
}

/* ===== CENTER CONTENT (chat area) ===== */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    background: var(--bg-primary);
}

/* messages scroll area — takes all space above floating input */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    padding-bottom: 160px; /* space for floating input */
    scroll-behavior: smooth;
}

/* Input Panel (Left Side) */
.input-panel {
    flex: 0 0 55%;
    min-width: 200px;
    max-width: calc(100% - 260px);
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-right: 16px;
}

/* Panel Tabs */
.panel-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
    flex-shrink: 0;
}

.panel-tab {
    padding: 8px 18px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 13px;
    font-family: inherit;
    color: var(--text-secondary);
    cursor: pointer;
    margin-bottom: -1px;
    transition: color 0.15s, border-color 0.15s;
}

.panel-tab:hover {
    color: var(--text-primary);
}

.panel-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: 500;
}

/* Tab content panels */
.panel-tab-content {
    display: none;
    flex: 1;
    flex-direction: column;
    gap: 12px;
    overflow: hidden;
    position: relative;
}

.panel-tab-content.active {
    display: flex;
}

/* Editor */
.editor-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    border-bottom: none;
    flex-shrink: 0;
}

.editor-filename {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 60%;
}

.editor-filename.has-file {
    color: var(--text-primary);
}

.editor-lang-badge {
    display: inline-block;
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-radius: 4px;
    padding: 1px 6px;
    margin-left: 6px;
    vertical-align: middle;
    line-height: 18px;
}
.editor-lang-badge:empty {
    display: none;
}

.editor-toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.editor-status {
    font-size: 12px;
    color: var(--accent);
}

.code-editor {
    flex: 1;
    width: 100%;
    box-sizing: border-box;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    resize: none;
    outline: none;
    tab-size: 4;
    white-space: pre;
    overflow-wrap: normal;
    overflow-x: auto;
}

.code-editor:focus {
    border-color: var(--accent);
}

/* CodeMirror overrides — make it fill the editor panel */
.CodeMirror {
    height: 100%;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    border: 1px solid var(--border);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.CodeMirror-scroll {
    height: 100%;
}

/* Editor send dialog */
.editor-send-dialog {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    z-index: 10;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
}

.editor-send-dialog-inner {
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.editor-send-dialog-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.editor-send-dialog-inner textarea {
    width: 100%;
    resize: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-size: 13px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-input);
    outline: none;
}

.editor-send-dialog-inner textarea:focus {
    border-color: var(--accent);
}

.editor-send-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    align-items: center;
}

.editor-send-confirm {
    padding: 7px 18px;
    font-size: 13px;
}

.input-area {
    flex: 1;
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-area:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim), var(--shadow);
}

.input-area textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    outline: none;
    padding: 16px;
    padding-bottom: 50px;
    line-height: 1.6;
    min-height: 200px;
}

.input-area textarea::placeholder {
    color: var(--text-muted);
}

.input-actions {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.float-plus {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    font-size: 22px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.float-plus:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.float-expand {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-muted);
    border: 1px solid var(--border);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.float-expand:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.input-area.expanded {
    position: fixed;
    inset: 60px 16px 56px;
    z-index: 200;
    flex: unset;
    box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}

.input-area.expanded textarea {
    min-height: unset;
    flex: 1;
}

/* Editor/Preview modal expanded = inner stretches to fill full viewport */
#editorModal .fullscreen-modal-inner.expanded,
#previewModal .fullscreen-modal-inner.expanded {
    margin: 0;
    border-radius: 0;
}

.attached-files {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 0;
}

.file-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px 4px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 12px;
    max-width: 220px;
}
.file-tag > span:first-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.file-tag .remove {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.2s;
}

.file-tag .remove:hover {
    color: var(--error);
}

.file-tag.uploading {
    min-width: 160px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border-radius: 10px;
    padding: 6px 12px;
}

.file-tag.uploading .upload-name {
    font-size: 12px;
    color: var(--text-secondary);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.upload-progress-bar-wrap {
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.upload-progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.1s linear;
    width: 0%;
}

.upload-progress-pct {
    font-size: 11px;
    color: var(--text-muted);
    align-self: flex-end;
}

/* Tool execution card (f2) */
.tool-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 4px 0 8px 0;
    overflow: hidden;
    font-size: 13px;
    background: var(--bg-secondary);
}
.tool-card-running {
    border-color: var(--accent, #4a90e2);
    background: color-mix(in srgb, var(--accent, #4a90e2) 6%, var(--bg-secondary));
}
.tool-card-done {
    border-color: var(--border);
}
.tool-card-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    font-weight: 600;
}
.tool-card-icon {
    flex-shrink: 0;
    width: 16px;
    text-align: center;
}
.tool-card-running .tool-card-icon { color: var(--accent, #4a90e2); }
.tool-card-done .tool-card-icon    { color: #22c55e; }
.tool-card-name {
    flex: 1;
    font-family: monospace;
    font-size: 12px;
    color: var(--text-primary);
}
.tool-card-status-label {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 400;
}
.tool-card-input {
    border-top: 1px solid var(--border);
    padding: 4px 10px;
    max-height: 80px;
    overflow: auto;
}
.tool-card-input pre {
    margin: 0;
    font-size: 11px;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-secondary);
}
.tool-card-result {
    border-top: 1px solid var(--border);
    padding: 4px 10px;
}
.tool-card-result details summary {
    cursor: pointer;
    font-size: 11px;
    color: var(--text-secondary);
    user-select: none;
    padding: 2px 0;
}
.tool-card-result details pre {
    margin: 4px 0 0 0;
    font-size: 11px;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 200px;
    overflow: auto;
    color: var(--text-primary);
}

/* Pasted image inline preview card */
.pasted-img-card {
    position: relative;
    display: inline-flex;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
}
.pasted-img-thumb {
    max-width: 80px;
    max-height: 64px;
    object-fit: cover;
    display: block;
}
.pasted-img-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 16px;
    height: 16px;
    background: rgba(0,0,0,0.55);
    color: #fff;
    border-radius: 50%;
    font-size: 12px;
    line-height: 16px;
    text-align: center;
    cursor: pointer;
    user-select: none;
}
.pasted-img-remove:hover { background: var(--error); }

.send-btn {
    padding: 14px 28px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s;
    align-self: center;
    display: block;
    margin: 0 auto;
    width: fit-content;
}

.send-btn:hover {
    background: var(--accent-hover);
}

.send-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

.send-btn.stop-mode {
    background: var(--error);
}

.send-btn.stop-mode:hover {
    background: #c62828;
}

.send-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.send-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.send-hint {
    font-size: 11px;
    color: var(--text-muted);
    user-select: none;
}

.voice-btn {
    padding: 10px 14px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    user-select: none;
    -webkit-user-select: none;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.voice-btn:hover {
    background: var(--bg-tertiary);
}

.voice-btn.recording {
    background: #fce8e6;
    border-color: var(--error);
    animation: pulse-ring 1s ease-in-out infinite;
}

.voice-btn.processing {
    background: var(--bg-secondary);
    border-color: transparent;
    cursor: wait;
    /* spinning border via conic-gradient trick */
    position: relative;
    animation: none;
}

.voice-btn.processing::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: conic-gradient(var(--accent) 80deg, transparent 80deg);
    z-index: -1;
    animation: voice-spin 0.8s linear infinite;
}

@keyframes voice-spin {
    to { transform: rotate(360deg); }
}

.voice-status {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    min-height: 18px;
    margin-bottom: 2px;
    transition: opacity 0.2s;
}

.voice-status:empty {
    display: none;
}

@keyframes pulse-ring {
    0%, 100% { box-shadow: 0 0 0 0 rgba(234,67,53,0.4); }
    50%       { box-shadow: 0 0 0 6px rgba(234,67,53,0); }
}

/* Response Panel (Right Side) */
.response-panel {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

/* Panel Resizer */
.panel-resizer,
.sidebar-resizer {
    flex: 0 0 8px;
    cursor: col-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.panel-resizer::before,
.sidebar-resizer::before {
    content: '';
    width: 3px;
    height: 40px;
    border-radius: 2px;
    background: var(--border);
    transition: background 0.2s, height 0.2s;
}

.panel-resizer:hover::before,
.panel-resizer.dragging::before,
.sidebar-resizer:hover::before,
.sidebar-resizer.dragging::before {
    background: var(--accent);
    height: 60px;
}


.response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    font-size: 14px;
}

.gen-skill-header-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    font-size: 12px;
    background: #2980b9;
    border: 1px solid #2471a3;
    border-radius: 14px;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
.gen-skill-header-btn:hover {
    background: #3498db;
    border-color: #2980b9;
}

/* ── Message Navigation Bar ───────────────────────────────────────────── */
.msg-nav {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;        /* only the dot column; popup expands via absolute positioning */
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0;
    z-index: 20;
    overflow: visible;
    pointer-events: none;
}
/* the popup card — shown when nav is hovered */
.msg-nav-popup {
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    width: 160px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12), 0 1px 4px rgba(0,0,0,0.08);
    padding: 6px 0;
    pointer-events: none;   /* never block mouse when hidden */
    opacity: 0;
    transition: opacity 0.18s;
    overflow: hidden;
}
.msg-nav-popup.visible {
    opacity: 1;
    pointer-events: auto;
}
.msg-nav-popup-item {
    display: block;
    padding: 5px 12px;
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    transition: color 0.12s, background 0.12s;
    user-select: none;
}
.msg-nav-popup-item:hover {
    color: var(--accent);
    background: rgba(var(--accent-rgb, 26,115,232), 0.06);
}
.msg-nav-popup-item.active {
    color: var(--accent);
    font-weight: 500;
}
/* dot column */
.msg-nav-dots {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    width: 20px;
    position: relative;
    pointer-events: auto;
}
/* track line behind dots */
.msg-nav-track {
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    background: var(--border);
    opacity: 0.45;
    pointer-events: none;
    z-index: 0;
}
.msg-nav-item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 22px;
    cursor: pointer;
    flex-shrink: 0;
    z-index: 1;
}
.msg-nav-item::after {
    content: '';
    display: block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    opacity: 0.45;
    transition: background 0.15s, transform 0.15s, opacity 0.15s;
}
.msg-nav-item.active::after {
    background: var(--accent);
    opacity: 1;
    transform: scale(1.4);
}
.msg-nav-dots:hover .msg-nav-item::after {
    opacity: 0.65;
}
.msg-nav-dots:hover .msg-nav-item:hover::after,
.msg-nav-dots:hover .msg-nav-item.active::after {
    background: var(--accent);
    opacity: 1;
    transform: scale(1.3);
}

/* ── Message Preview Tooltip (nav bar hover) ─────────────────────────── */
.msg-preview {
    position: absolute;
    z-index: 30;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 12px;
    line-height: 1.6;
    max-width: 260px;
    pointer-events: none;
    box-shadow: 0 4px 18px rgba(0,0,0,0.28);
    /* clamp to 5 lines */
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-all;
    animation: previewFadeIn 0.15s ease;
}
@keyframes previewFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.clear-header-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    font-size: 12px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.clear-header-btn:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.text-btn {
    background: none;
    border: none;
    color: var(--accent);
    font-size: 13px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 16px;
    transition: all 0.2s;
}

.text-btn:hover {
    background: var(--accent-dim);
}

.btn-success-flash {
    color: #4caf50 !important;
    background: rgba(76,175,80,0.12) !important;
}

/* Messages Area */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 80px 160px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.welcome-message {
    color: var(--text-muted);
    text-align: center;
    margin-top: 60px;
    font-size: 14px;
}

/* Message row: avatar + body side by side */
.message {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    max-width: 100%;
    animation: msgFadeIn 0.2s ease;
}
@keyframes msgFadeIn { from { opacity:0; transform:translateY(6px); } to { opacity:1; transform:translateY(0); } }

.message.user {
    flex-direction: row;
}

/* Avatar */
.msg-avatar {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    flex-shrink: 0;
    align-self: flex-start;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 700;
}
.msg-avatar svg {
    width: 20px;
    height: 20px;
}
.msg-avatar-ai {
    background: linear-gradient(135deg, var(--cyber-primary, #06b6d4), #3b82f6);
    color: #fff;
    box-shadow: 0 2px 10px rgba(6,182,212,0.3);
}
.msg-avatar-user {
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    color: #fff;
    box-shadow: 0 2px 10px rgba(139,92,246,0.3);
}
.msg-avatar-user span {
    color: #fff;
    font-weight: 700;
}

/* Body */
.msg-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: calc(100% - 50px);  /* leave room for avatar */
}
.user-body {
    align-items: flex-end;
}

/* Name + time row */
.msg-header-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 2px;
}
.user-header-row {
    flex-direction: row-reverse;
}
.msg-sender-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--cyber-primary, #06b6d4);
}

/* Bubbles */
.msg-bubble {
    border-radius: 14px;
    padding: 12px 16px;
    line-height: 1.65;
    font-size: 14px;
    word-break: break-word;
    position: relative;
    width: fit-content;
    max-width: 100%;
}
.assistant-bubble {
    background: var(--bg-primary);
    border: 1px solid var(--cyber-border, rgba(0,240,255,0.2));
    box-shadow: 0 0 12px rgba(0,240,255,0.06), inset 0 0 20px rgba(0,240,255,0.03);
    border-bottom-left-radius: 4px;
    backdrop-filter: blur(8px);
    width: auto;
    max-width: 100%;
}
.user-bubble {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover, #0ea5e9));
    color: #fff;
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 12px rgba(6,182,212,0.25);
}
.user-bubble .message-content {
    color: #fff;
}

.message-content {
    white-space: normal;
    word-break: break-word;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

/* Markdown rendered content styles */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
    margin: 12px 0 8px 0;
    font-weight: 600;
}

.message-content h1 { font-size: 1.4em; }
.message-content h2 { font-size: 1.2em; }
.message-content h3 { font-size: 1.1em; }

.message-content p {
    margin: 8px 0;
}
.message-content > :last-child {
    margin-bottom: 0;
}

.message-content ul,
.message-content ol {
    margin: 8px 0;
    padding-left: 24px;
}

.message-content li {
    margin: 4px 0;
}

.message-content code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.message-content pre {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 8px 0;
}

.message-content pre code {
    background: none;
    padding: 0;
}

[data-theme="dark"] .message-content pre,
[data-theme="dark"] .code-block-wrapper pre {
    background: var(--bg-code);
    color: var(--text-code);
    border-left: 3px solid var(--accent);
}

/* Code block wrapper with toolbar */
.code-block-wrapper {
    position: relative;
    margin: 8px 0;
    transition: background-color 0.2s, border-color 0.2s;
}
.code-block-wrapper pre {
    margin: 0;
    padding-top: 36px; /* room for toolbar */
}
.code-lang-label {
    position: absolute;
    top: 8px;
    left: 12px;
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-transform: lowercase;
    user-select: none;
    pointer-events: none;
}
.code-copy-btn {
    position: absolute;
    top: 6px;
    right: 8px;
    padding: 2px 10px;
    font-size: 11px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0.4;
    transition: opacity 0.2s, color 0.2s;
    z-index: 2;
}
.code-block-wrapper:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* Code block collapse/expand */
.code-block-collapsed pre {
    max-height: 320px;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
    mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
}
.code-expand-btn {
    display: none;
    width: 100%;
    padding: 6px 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 6px 6px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    text-align: center;
}
.code-block-collapsed .code-expand-btn { display: block; }
.code-block-wrapper:not(.code-block-collapsed) .code-expand-btn { display: block; }

/* Streaming plain-text pre — replaced by full markdown on completion */
.streaming-pre {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 6px;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: var(--font-mono);
    font-size: 0.88em;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0;
}

.message-content blockquote {
    border-left: 3px solid var(--accent);
    margin: 8px 0;
    padding-left: 12px;
    color: var(--text-secondary);
}

.message-content a {
    color: var(--accent);
    text-decoration: none;
}

.message-content a:hover {
    text-decoration: underline;
}

.message-content table {
    border-collapse: collapse;
    margin: 8px 0;
    width: 100%;
}

.message-content th,
.message-content td {
    border: 1px solid var(--border);
    padding: 6px 12px;
    text-align: left;
}

.message-content th {
    background: var(--bg-secondary);
}

.message-content img {
    max-width: 100%;
    height: auto;
}

.message-actions {
    display: flex;
    gap: 8px;
}

/* Assistant message meta row: time on left, actions on right */
.msg-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 6px;
    gap: 8px;
}
.msg-meta .msg-time {
    margin-top: 0;
}

/* Bubble-internal actions — right-bottom corner, fade in on hover */
.bubble-actions {
    display: flex;
    gap: 6px;
    justify-content: flex-end;
    margin-top: 8px;
    opacity: 0;
    transition: opacity 0.18s;
}
.assistant-bubble:hover .bubble-actions {
    opacity: 1;
}

.bubble-actions .copy-btn,
.bubble-actions .download-btn,
.bubble-actions .download-audio-btn,
.bubble-actions .gen-skill-btn,
.message-actions .copy-btn,
.message-actions .download-btn,
.message-actions .download-audio-btn,
.message-actions .gen-skill-btn {
    padding: 3px 10px;
    font-size: 11px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.bubble-actions .copy-btn:hover,
.bubble-actions .download-btn:hover,
.bubble-actions .download-audio-btn:hover,
.bubble-actions .gen-skill-btn:hover,
.message-actions .copy-btn:hover,
.message-actions .download-btn:hover,
.message-actions .download-audio-btn:hover,
.message-actions .gen-skill-btn:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.bubble-actions .download-audio-btn {
    /* visibility controlled by JS — button only in DOM when CosyVoice is available */
}

/* Copy split button (Markdown / plain text) */
.copy-split-wrap {
    position: relative;
    display: inline-flex;
}
.copy-split-wrap .copy-btn {
    border-radius: 12px 0 0 12px;
    border-right: none;
}
.copy-split-wrap .copy-split-arrow {
    padding: 3px 7px;
    font-size: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0 12px 12px 0;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1.6;
}
.copy-split-wrap .copy-split-arrow:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}
.copy-split-menu {
    position: absolute;
    bottom: calc(100% + 4px);
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.18);
    z-index: 999;
    min-width: 120px;
    display: none;
    overflow: hidden;
}
.copy-split-menu.open { display: block; }
.copy-split-menu-item {
    padding: 7px 14px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
}
.copy-split-menu-item:hover {
    background: var(--accent-dim);
    color: var(--accent);
}

/* TTS speaker button */
.bubble-actions .tts-btn,
.message-actions .tts-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.bubble-actions .tts-btn:hover,
.message-actions .tts-btn:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.message-actions .tts-btn .tts-icon {
    font-size: 13px;
    line-height: 1;
}

/* Playing animation: bars pulse like equalizer */
.message-actions .tts-btn.tts-playing .tts-icon {
    display: inline-block;
    animation: tts-pulse 0.6s ease-in-out infinite alternate;
}

@keyframes tts-pulse {
    from { transform: scale(0.85); opacity: 0.7; }
    to   { transform: scale(1.15); opacity: 1; }
}

/* Loading spinner */
.message-actions .tts-btn.tts-loading .tts-icon {
    display: inline-block;
    animation: tts-spin 1s linear infinite;
}

@keyframes tts-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.msg-file-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 11px;
    margin-bottom: 6px;
    margin-right: 4px;
    color: var(--text-primary);
}

/* Footer */
.footer {
    display: flex;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
}

.footer-left {
    display: flex;
    gap: 8px;
}

.footer-right {
    display: flex;
    gap: 8px;
}

.footer .text-btn {
    color: var(--text-secondary);
}

.footer .text-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.25);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
    animation: modalFadeIn 0.2s ease-out;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 480px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    animation: modalSlideUp 0.25s ease-out;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalSlideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-large {
    max-width: 640px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 500;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: 14px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s;
    position: relative;
}

.tab-btn.active {
    color: var(--accent);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.save-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    transition: background 0.2s;
}

.save-btn:hover {
    background: var(--accent-hover);
}

.save-btn.danger-btn {
    background: #c0392b;
    width: auto;
    padding: 10px 20px;
}

.save-btn.danger-btn:hover {
    background: #a93226;
}

.about-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 0 16px;
    gap: 12px;
}

.about-logo {
    width: 64px;
    height: 64px;
    border-radius: 16px;
}

.about-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.about-version {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.log-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.refresh-btn {
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: all 0.2s;
}

.refresh-btn:hover {
    background: var(--bg-tertiary);
}

/* Permission Modal */
.permission-modal .modal-content {
    max-width: 380px;
    text-align: center;
}

.permission-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.permission-title {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 8px;
}

.permission-desc {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 16px;
}

.permission-path {
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 12px;
    word-break: break-all;
    margin-bottom: 20px;
    text-align: left;
}

.permission-buttons {
    display: flex;
    gap: 12px;
}

.permission-buttons button {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    transition: all 0.2s;
}

.permission-buttons .deny-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.permission-buttons .deny-btn:hover {
    background: var(--bg-tertiary);
}

.permission-buttons .grant-btn {
    background: var(--accent);
    color: #ffffff;
}

.permission-buttons .grant-btn:hover {
    background: var(--accent-hover);
}

/* History List */
.history-search-wrap {
    position: relative;
    padding-bottom: 8px;
}

.history-search-wrap input {
    width: 100%;
    padding: 7px 32px 7px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-input);
    outline: none;
    box-sizing: border-box;
}

.history-search-wrap input:focus {
    border-color: var(--accent);
}

.history-search-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-60%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1;
    padding: 2px 4px;
    border-radius: 50%;
    transition: color 0.15s, background 0.15s;
}
.history-search-clear:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.history-section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 8px 4px 4px;
}

.history-item {
    padding: 10px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.history-item:hover {
    background: var(--bg-tertiary);
}

.history-item.active {
    border-left: 3px solid var(--accent);
    padding-left: 9px;
}

/* 顶行：标题 + 时间 */
.history-item-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-width: 0;
}

.history-title {
    font-size: 13px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.history-time {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

.history-item .session-id {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.history-item .preview {
    font-size: 11px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.history-item .history-snippet {
    white-space: normal;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    text-overflow: unset;
}

/* 底行：标签 + 操作按钮 */
.history-item-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    min-width: 0;
}

.history-tags {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
    overflow: hidden;
}

.history-tag {
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 3px;
    white-space: nowrap;
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-tag-model {
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}

.history-tag-count {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border: 1px solid var(--border);
}


.history-load-more {
    display: block;
    width: 100%;
    padding: 8px 0;
    background: none;
    border: none;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
    text-align: center;
    transition: color 0.15s, background 0.15s;
}
.history-load-more:hover {
    color: var(--accent);
    background: var(--bg-tertiary);
}

/* Keyword highlight in search results */
mark {
    background: var(--highlight-bg, #ffe066);
    color: var(--highlight-color, #333);
    border-radius: 2px;
    padding: 0 1px;
}

/* Editor tab dirty indicator dot */
.editor-dirty-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #f59e0b;
    margin-left: 5px;
    vertical-align: middle;
    position: relative;
    top: -1px;
}

.history-item-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

/* hover 显隐：默认隐藏，卡片 hover 时出现 */
.history-action-btn.hov-btn {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
}

.history-item:hover .history-action-btn.hov-btn {
    opacity: 1;
    pointer-events: auto;
}

.history-action-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 3px 6px;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1;
}

.history-action-btn:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.history-action-btn.star-btn.starred {
    color: #f5a623;
    border-color: #f5a623;
}

.history-action-btn.delete-btn:hover {
    color: #e05555;
    border-color: #e05555;
    background: rgba(224, 85, 85, 0.08);
}

.history-action-btn.export-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
}

.session-title-indicator {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
    flex-shrink: 1;
}

.modal-small .modal-content {
    max-width: 360px;
}

/* Move Confirm Dialog */
.move-confirm-box {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    min-width: 320px;
    max-width: 90vw;
    backdrop-filter: blur(12px);
    z-index: 3000;
}

.move-confirm-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(80,120,255,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #5078ff;
}

.move-confirm-body {
    flex: 1;
    min-width: 0;
}

.move-confirm-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.move-confirm-desc {
    font-size: 12px;
    color: var(--text-secondary);
    word-break: break-all;
}

.move-confirm-actions {
    flex-shrink: 0;
    display: flex;
    gap: 6px;
    align-items: center;
}

/* Sticky save button in settings AI tab */
#ai-settings .save-btn {
    position: sticky;
    bottom: 0;
    width: 100%;
    margin-top: 8px;
    z-index: 1;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-inverse, #323232);
    color: var(--text-inverse, #ffffff);
    padding: 12px 20px;
    border-radius: 20px;
    font-size: 13px;
    z-index: 2000;
    box-shadow: var(--shadow-md);
    animation: toast-in 0.15s ease;
    cursor: pointer;
    user-select: none;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(-50%) translateY(6px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Typing indicator */
.typing::after {
    content: '';
    animation: typing 1s infinite;
}

@keyframes typing {
    0%, 50% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Loading */
.loading {
    color: var(--text-muted);
    text-align: center;
    padding: 20px;
}
/* spinner dots for search/loading states */
.loading-searching::after {
    content: '';
    display: inline-block;
    animation: searchDots 1.2s steps(4, end) infinite;
}
@keyframes searchDots {
    0%   { content: ''; }
    25%  { content: '.'; }
    50%  { content: '..'; }
    75%  { content: '...'; }
    100% { content: ''; }
}

/* AI error message in chat */
.message.assistant.msg-error {
    border-left: 3px solid #e74c3c;
    background: rgba(231, 76, 60, 0.06);
}
.message.assistant.msg-error .message-content {
    color: #c0392b;
}
.msg-error-icon {
    display: inline-block;
    margin-right: 6px;
    font-weight: bold;
}

/* Draggable */
[draggable="true"] {
    cursor: grab;
}

[draggable="true"]:active {
    cursor: grabbing;
}

/* Context Menu */
.context-menu {
    position: fixed;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    min-width: 140px;
    z-index: 3000;
    display: none;
    padding: 4px 0;
}

.context-menu.visible {
    display: block;
}

.context-menu-item {
    padding: 10px 16px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}

.context-menu-item:hover {
    background: var(--accent-dim);
    color: var(--accent);
}

.context-menu-item.disabled {
    color: var(--text-muted, #999);
    cursor: default;
    opacity: 0.5;
    font-style: italic;
    pointer-events: none;
}

.context-menu-separator {
    border-top: 1px solid var(--border);
    margin-top: 4px;
    padding-top: 12px;
}

/* Editor context menu — two-column layout with shortcut hints */
.editor-context-menu {
    min-width: 180px;
}
.ecm-with-key {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.ecm-key {
    font-size: 11px;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Inline rename input inside tree items */
.tree-rename-input {
    flex: 1;
    font-size: 13px;
    font-family: inherit;
    background: var(--bg-primary);
    border: 1px solid var(--accent);
    border-radius: 3px;
    padding: 1px 5px;
    color: var(--text-primary);
    outline: none;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 25%, transparent);
    min-width: 60px;
    max-width: calc(100% - 28px);
    height: 20px;
}

/* Permission Request in Chat */
.permission-request {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
}

.permission-content {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.permission-icon {
    font-size: 24px;
}

.permission-text {
    flex: 1;
}

.permission-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.permission-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.permission-path {
    background: var(--bg-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 12px;
    word-break: break-all;
    color: var(--text-secondary);
}

.permission-buttons {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.perm-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
}

.perm-btn.deny {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.perm-btn.deny:hover {
    background: var(--error);
    color: #fff;
}

.perm-btn.grant {
    background: var(--accent);
    color: #fff;
}

.perm-btn.grant:hover {
    background: var(--accent-hover);
}

/* Inline Permission in Message */
.permission-inline {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.permission-inline .permission-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.permission-inline .permission-text {
    flex: 1;
    line-height: 1.5;
}

.message .permission-buttons {
    margin-top: 12px;
}

/* Login Overlay */
.login-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 320px;
    padding: 40px 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}

.login-logo {
    width: 56px;
    height: 56px;
}

.login-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.login-input {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.login-input:focus {
    border-color: var(--accent);
}

.login-btn {
    width: 100%;
    padding: 10px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.login-btn:hover {
    background: var(--accent-hover);
}

.login-error {
    font-size: 13px;
    color: var(--error);
    text-align: center;
    min-height: 18px;
}

/* ===== Preview Tab ===== */
.preview-area {
    flex: 1;
    overflow: auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.preview-iframe {
    width: 100%;
    flex: 1;
    border: none;
    min-height: 0;
}
.preview-placeholder, .preview-loading, .preview-error {
    color: var(--text-muted);
    font-size: 13px;
    padding: 24px;
    text-align: center;
}
.preview-error { color: var(--error); }
.preview-table-wrap {
    padding: 12px;
    overflow: auto;
}
.preview-table-wrap table {
    border-collapse: collapse;
    font-size: 12px;
}
.preview-table-wrap td, .preview-table-wrap th {
    border: 1px solid var(--border);
    padding: 4px 8px;
    white-space: nowrap;
    max-width: 240px;
    overflow: hidden;
    text-overflow: ellipsis;
}
.preview-table-wrap th {
    background: var(--bg-secondary);
    font-weight: 600;
    position: sticky;
    top: 0;
}
.preview-docx-wrap {
    padding: 24px 32px;
    max-width: 820px;
    margin: 0 auto;
    line-height: 1.7;
    font-size: 14px;
}
.preview-docx-wrap h1,.preview-docx-wrap h2,.preview-docx-wrap h3 {
    margin: 1em 0 0.4em;
}
.preview-docx-wrap p { margin: 0.5em 0; }
.preview-docx-wrap table {
    border-collapse: collapse;
    margin: 0.8em 0;
}
.preview-docx-wrap td, .preview-docx-wrap th {
    border: 1px solid var(--border);
    padding: 4px 8px;
}
.preview-image {
    display: block;
    max-width: 100%;
    max-height: 100%;
    margin: auto;
    object-fit: contain;
    padding: 12px;
}

/* ── 思考面板 ──────────────────────────────────────────── */
.thinking-panel {
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--bg-secondary);
    font-size: 13px;
}
.thinking-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    cursor: pointer;
    user-select: none;
    color: var(--text-muted);
    font-weight: 500;
}
.thinking-header:hover { color: var(--text-primary); }
.thinking-icon { font-size: 12px; }
.thinking-chevron {
    margin-left: auto;
    font-size: 10px;
    transition: transform 0.2s;
}
.thinking-panel.expanded .thinking-chevron { transform: rotate(180deg); }
.thinking-body {
    display: none;
    border-top: 1px solid var(--border);
    max-height: 360px;
    overflow-y: auto;
}
.thinking-panel.expanded .thinking-body { display: block; }
.thinking-text {
    margin: 0;
    padding: 10px 12px;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: inherit;
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.thinking-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    user-select: none;
    font-size: 11px;
    color: var(--text-muted);
}
.thinking-toggle input[type="checkbox"] {
    width: 14px;
    height: 14px;
    cursor: pointer;
    accent-color: var(--accent);
}

/* Message timestamp */
.msg-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
    display: block;
    opacity: 0.7;
}
.message.assistant .msg-time {
    text-align: left;
}

/* Drag-drop overlay on input area */
.input-drop-overlay {
    position: absolute;
    inset: 0;
    background: var(--accent-dim);
    border: 2px dashed var(--accent);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--accent);
    font-weight: 500;
    pointer-events: none;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.15s;
}
.input-area.drag-over .input-drop-overlay {
    opacity: 1;
}

/* Drop success flash */
@keyframes drop-success-kf {
    0%   { box-shadow: inset 0 0 0 2px var(--success); }
    60%  { box-shadow: inset 0 0 0 2px var(--success); }
    100% { box-shadow: inset 0 0 0 0px transparent; }
}
.input-area.drop-success {
    animation: drop-success-kf 0.8s ease-out forwards;
}

.mode-toggle { display: flex; flex-direction: row; gap: 16px; margin-top: 4px; flex-wrap: wrap; }
.radio-label { display: flex; align-items: center; gap: 6px; font-size: 13px; cursor: pointer; user-select: none; }
.radio-label input[type="radio"] { width: 14px; height: 14px; margin: 0; cursor: pointer; flex-shrink: 0; }
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 6px; line-height: 1.5; }

.mode-badge {
    display: inline-flex;
    align-items: center;
    padding: 1px 7px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    line-height: 18px;
    letter-spacing: 0.02em;
    user-select: none;
}
.mode-badge-api {
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.mode-badge-cli {
    background: color-mix(in srgb, #22c55e 15%, transparent);
    color: #16a34a;
    border: 1px solid color-mix(in srgb, #22c55e 35%, transparent);
}

/* Skills modal */
.modal-wide { width: 600px; max-width: 95vw; }
.skills-section { margin-bottom: 20px; }
.skills-section:last-child { margin-bottom: 0; }
.skills-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}
.skills-list { display: flex; flex-direction: column; gap: 4px; min-height: 32px; }
.skills-empty { font-size: 13px; color: var(--text-muted); padding: 8px 0; line-height: 1.8; }
.skills-empty span { font-size: 12px; opacity: 0.7; }
.empty-state-hint { font-size: 13px; color: var(--text-muted); padding: 12px 16px; line-height: 1.8; text-align: center; }
.empty-state-hint span { display: block; font-size: 12px; opacity: 0.7; }
.skill-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 8px;
    border-radius: var(--radius);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    cursor: default;
}
.skill-item:hover { background: var(--bg-tertiary); }
.skill-item.disabled { opacity: 0.55; }
.skill-name {
    flex: 1;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.skill-name:hover { color: var(--accent); }
.skill-folder {
    font-size: 11px;
    color: var(--text-muted);
    font-family: monospace;
    flex-shrink: 0;
}
.skill-toggle {
    position: relative;
    width: 30px;
    height: 16px;
    flex-shrink: 0;
}
.skill-toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.skill-toggle-track {
    position: absolute;
    inset: 0;
    background: var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}
.skill-toggle input:checked + .skill-toggle-track { background: var(--accent); }
.skill-toggle-track::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
}
.skill-toggle input:checked + .skill-toggle-track::after { transform: translateX(14px); }
.skill-action-btn {
    background: none;
    border: none;
    padding: 2px 5px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1;
    flex-shrink: 0;
}
.skill-action-btn:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.skill-action-btn.star-active { color: #f59e0b; }
.skills-search-bar { margin-bottom: 10px; display: flex; gap: 6px; align-items: center; }
.skills-search-bar input { flex: 1; box-sizing: border-box; padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-secondary); color: var(--text-primary); font-size: 13px; outline: none; }
.skills-search-bar input:focus { border-color: var(--accent); }
.skills-hint { font-size: 11px; color: var(--text-muted); flex-shrink: 0; white-space: nowrap; }
.skill-upload-btn { flex-shrink: 0; padding: 5px 8px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-secondary); color: var(--text-muted); cursor: pointer; display: flex; align-items: center; }
.skill-upload-btn:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.skills-tabs { margin-bottom: 10px; }

/* ===== Responsive Layout ===== */

/* Tablet: hide sidebar, stack panels if needed */
@media (max-width: 1024px) {
    .sidebar {
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        z-index: 200;
        box-shadow: 2px 0 12px rgba(0,0,0,0.18);
        transition: transform 0.25s ease, opacity 0.25s ease;
    }
    .sidebar.collapsed {
        width: 280px;
        opacity: 1;
        transform: translateX(-100%);
        overflow: hidden;
    }
    .sidebar.collapsed + .sidebar-resizer { display: none; }
    .sidebar-resizer { display: none; }
    .input-panel {
        flex: 0 0 50%;
        min-width: 280px;
    }
}

/* Mobile: single-column — hide response panel, full-width input */
@media (max-width: 640px) {
    .header { padding: 8px 12px; gap: 8px; min-height: 50px; }
    .header-title { font-size: 14px; }
    .content { padding: 8px; flex-direction: column; }
    .input-panel {
        flex: 1 1 auto;
        width: 100%;
        max-width: 100%;
        padding-right: 0;
    }
    .panel-resizer { display: none; }
    .response-panel { display: none; }
    .input-panel.response-visible { flex: 0 0 45%; }
    .response-panel.visible { display: flex; flex: 1; }
}

/* Generic confirm modal always appears on top of other modals */
#genericConfirmModal { z-index: 2000; }

/* Scroll-to-top floating button */
.scroll-to-top-btn {
    position: absolute;
    bottom: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: opacity 0.15s, transform 0.15s;
    z-index: 10;
    font-size: 12px;
}
.scroll-to-top-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-1px);
}

/* Scroll-to-bottom floating button */
.scroll-to-bottom-btn {
    position: absolute;
    bottom: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: opacity 0.15s, transform 0.15s;
    z-index: 10;
    font-size: 12px;
}
.scroll-to-bottom-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-1px);
}

/* Edit button on user messages — icon style, sits left of timestamp */
.message.user .msg-time {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    text-align: unset;
}
.edit-msg-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
    display: inline-flex;
    align-items: center;
    line-height: 1;
}
.edit-msg-btn svg {
    width: 13px;
    height: 13px;
}
.message.user:hover .edit-msg-btn {
    opacity: 1;
}
.edit-msg-btn:hover {
    color: var(--text-primary);
}

/* Skills empty-state create button */
.skills-create-btn {
    margin-top: 8px;
    padding: 5px 14px;
    border: 1px solid var(--accent);
    border-radius: 6px;
    background: none;
    color: var(--accent);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.skills-create-btn:hover {
    background: var(--accent);
    color: #fff;
}

/* Session title flash on auto-name */
@keyframes title-flash-kf {
    0%   { background: rgba(124, 77, 255, 0.25); }
    100% { background: transparent; }
}
.session-title-indicator.title-flash {
    animation: title-flash-kf 1.2s ease-out forwards;
    border-radius: 3px;
}

/* ============================================================
   NEW COMPONENTS — appended for new 3-column layout
   ============================================================ */

/* ===== RIGHT SIDEBAR ===== */
.right-sidebar {
    width: 260px;
    background: var(--right-sidebar-bg);
    border-left: 1px solid var(--cyber-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: relative;
    transition: width 0.3s ease, opacity 0.3s ease;
    backdrop-filter: blur(10px);
}
.right-sidebar.collapsed {
    width: 0;
    opacity: 0;
    overflow: hidden;
}
/* Right sidebar toggle button — lives in header, no special positioning needed */
/* Active state: right panel open = icon fully opaque */
#toggleRightSidebar { opacity: 0.7; }
#toggleRightSidebar.panel-open { opacity: 1; color: var(--cyber-primary); }
#toggleRightSidebar svg rect:first-child { transition: opacity 0.2s; }
#toggleRightSidebar.panel-open svg rect:first-child { opacity: 0.8; }
.right-sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* Right panel (shared) */
.right-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex: 1;
    min-height: 0;
}
.right-panel + .right-panel {
    border-top: 1px solid var(--cyber-border);
    flex: 0 0 auto;
    min-height: 200px;
    max-height: 260px;
}
.right-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px 8px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--cyber-border);
}
.right-panel-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.right-panel-title .nav-icon { width: 12px; height: 12px; }
.right-panel-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}
.right-panel-scroll {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}
.right-panel-footer {
    padding: 8px;
    border-top: 1px solid var(--cyber-border);
    flex-shrink: 0;
}
.right-panel-footer-btn {
    width: 100%;
    padding: 7px 10px;
    background: var(--accent-dim);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    color: var(--cyber-primary);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: background 0.15s;
}
.right-panel-footer-btn + .right-panel-footer-btn { margin-top: 5px; }
.right-panel-footer-btn:hover { background: var(--nav-active-bg); }

/* History panel list */
.right-history-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}
/* Inline search box in right history panel */
.right-history-search-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-bottom: 1px solid var(--cyber-border);
    flex-shrink: 0;
}
.right-history-search-wrap svg { color: var(--text-muted); flex-shrink: 0; }
.right-history-search-wrap input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    font-size: 12px;
    color: var(--text-primary);
}
.right-history-search-wrap input::placeholder { color: var(--text-muted); }

/* Toolbar at bottom of history panel */
.rh-toolbar {
    display: flex;
    gap: 6px;
    padding: 6px 8px;
    border-top: 1px solid var(--cyber-border);
    flex-shrink: 0;
    background: var(--bg-secondary);
}
.rh-toolbar-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 5px 8px;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid var(--cyber-border);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}
.rh-toolbar-btn svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}
.rh-toolbar-btn:hover {
    color: var(--cyber-primary);
    border-color: var(--cyber-primary);
    background: var(--accent-dim);
}

/* Search bar between history panel and status panel */
.rh-search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    flex-shrink: 0;
    border-top: 1px solid var(--cyber-border);
    border-bottom: 1px solid var(--cyber-border);
    background: var(--bg-secondary);
}
.rh-search-bar svg {
    color: var(--text-muted);
    flex-shrink: 0;
    opacity: 0.7;
}
.rh-search-bar input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    outline: none;
    font-size: 12px;
    color: var(--text-primary);
    padding: 5px 10px;
    transition: border-color 0.2s;
}
.rh-search-bar input:focus {
    border-color: var(--cyber-primary);
}
.rh-search-bar input::placeholder { color: var(--text-muted); }

/* Section labels */
.right-history-section-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 8px 10px 4px;
}

/* Card */
.rh-empty-state {
    padding: 16px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

.rh-card {
    padding: 10px 12px;
    border-radius: 8px;
    margin: 0 8px 8px;
    cursor: pointer;
    transition: transform 0.2s;
    user-select: none;
}
.rh-card:hover { transform: translateX(3px); }

.rh-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 6px;
    margin-bottom: 6px;
}
.rh-card-title {
    font-size: 12px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}
.rh-card-time {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}
.rh-card-snippet {
    font-size: 11px;
    color: var(--text-muted);
    margin: 0 0 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
    min-height: 1.5em;
}
.rh-card-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
}
.rh-card-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.rh-tag {
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 4px;
    font-weight: 500;
}
.rh-tag-model {
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.rh-tag-count {
    background: rgba(0,0,0,0.12);
    color: var(--text-muted);
}

/* Action buttons (right-bottom) */
.rh-card-actions {
    display: flex;
    gap: 1px;
    flex-shrink: 0;
}
.rh-action-btn {
    background: none;
    border: none;
    padding: 3px 5px;
    font-size: 11px;
    cursor: pointer;
    color: var(--text-muted);
    border-radius: 3px;
    line-height: 1;
    transition: color 0.15s, background 0.15s;
}
.rh-action-btn:hover { color: var(--cyber-primary); background: rgba(0,0,0,0.15); }
.rh-action-btn.starred { color: #f59e0b; }
.rh-action-btn.delete:hover { color: #f87171; background: rgba(239,68,68,0.15); }
.rh-action-btn.hov-btn { opacity: 0; pointer-events: none; transition: opacity 0.15s; }
.rh-card:hover .rh-action-btn.hov-btn { opacity: 1; pointer-events: auto; }

/* Status panel */
.status-panel { flex: 0 0 auto; min-height: 200px; }
.status-running-dot {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--success);
}
.status-pulse {
    display: inline-block;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--success);
    position: relative;
    transition: background 0.4s;
}
.status-pulse::after {
    content: '';
    position: absolute;
    top: -3px; left: -3px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: inherit;
    opacity: 0.3;
    animation: statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.5); opacity: 0; }
}
.status-block { padding: 8px 0; }
.status-block + .status-block { border-top: 1px solid var(--cyber-border); }
.status-block-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 5px;
}
.status-label { font-size: 11px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.status-value { font-size: 12px; color: var(--cyber-primary); font-family: var(--font-mono); font-weight: 600; }
.status-value.status-purple { color: #a78bfa; }
.status-value.status-green { color: var(--success); }
.status-bar-bg {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}
.status-bar-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.6s ease;
}
.status-bar-cyan { background: linear-gradient(90deg, var(--cyber-primary), var(--accent-hover)); }
.status-bar-purple { background: linear-gradient(90deg, #7c3aed, #a78bfa); }
.status-bar-green { background: linear-gradient(90deg, #059669, #34d399); }
.status-no-device { font-size: 10px; color: var(--text-muted); opacity: 0.6; margin-top: 3px; display: block; }

/* ===== FLOATING INPUT BAR ===== */
.floating-input-container {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 92%;
    max-width: 860px;
    padding: 0 0 18px;
    pointer-events: none;
    z-index: 50;
}
.floating-input-bar {
    position: relative;
    background: var(--floating-bg, rgba(10,10,15,0.95));
    border: 1px solid var(--cyber-border);
    border-radius: 20px;
    box-shadow:
        0 0 30px var(--accent-dim),
        0 8px 32px rgba(0,0,0,0.35),
        inset 0 0 40px var(--accent-dim);
    backdrop-filter: blur(16px);
    pointer-events: all;
    overflow: hidden;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.floating-input-bar:hover {
    border-color: color-mix(in srgb, var(--cyber-primary) 60%, transparent);
    box-shadow:
        0 0 40px color-mix(in srgb, var(--cyber-primary) 15%, transparent),
        0 8px 32px rgba(0,0,0,0.4),
        inset 0 0 40px var(--accent-dim);
}
.floating-input-bar:focus-within {
    border-color: var(--cyber-primary);
    box-shadow:
        0 0 40px color-mix(in srgb, var(--cyber-primary) 20%, transparent),
        0 8px 32px rgba(0,0,0,0.4),
        0 0 0 2px var(--accent-dim),
        inset 0 0 40px var(--accent-dim);
}
/* streaming state: muted input visual */
.floating-input-bar.streaming-active {
    border-color: color-mix(in srgb, var(--cyber-primary) 30%, transparent);
}
.floating-input-bar.streaming-active .floating-textarea {
    opacity: 0.5;
    cursor: not-allowed;
}
.floating-input-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
}
.floating-textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    font-family: var(--font-ui);
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 24px;
    max-height: 120px;   /* ~3 lines */
    overflow-y: auto;
    padding: 2px 0;
    scrollbar-width: thin;
}
.floating-textarea::placeholder { color: var(--text-muted); }

/* Skill autocomplete dropdown */
.skill-autocomplete {
    position: absolute !important;
    bottom: 100% !important;
    left: 16px !important;
    right: 16px !important;
    margin-bottom: 8px;
    max-height: 240px;
    overflow-y: auto;
    background: var(--floating-bg);
    border: 1px solid var(--cyber-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    backdrop-filter: blur(20px);
    pointer-events: all;
}
.skill-autocomplete-item {
    padding: 10px 14px;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.skill-autocomplete-item:last-child {
    border-bottom: none;
}
.skill-autocomplete-item:hover,
.skill-autocomplete-item.active {
    background: var(--accent-dim);
}
.skill-autocomplete-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--cyber-primary);
}
.skill-autocomplete-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Icon buttons (upload) */
.float-icon-btn {
    background: transparent;
    border: none;
    color: color-mix(in srgb, var(--cyber-primary) 60%, transparent);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color 0.15s, background 0.15s;
}
.float-icon-btn:hover {
    color: var(--cyber-primary);
    background: rgba(0,240,255,0.08);
}

/* Voice button: bordered pill like prototype */
.float-voice-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: color-mix(in srgb, var(--cyber-primary) 10%, transparent);
    border: 1px solid color-mix(in srgb, var(--cyber-primary) 30%, transparent);
    color: var(--cyber-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.float-voice-btn:hover {
    background: color-mix(in srgb, var(--cyber-primary) 20%, transparent);
    border-color: color-mix(in srgb, var(--cyber-primary) 50%, transparent);
}
.float-voice-btn.recording {
    color: #e74c3c;
    border-color: #e74c3c;
    background: rgba(231,76,60,0.12);
    animation: recordPulse 1s ease-in-out infinite;
}
.float-voice-btn.processing {
    opacity: 0.6;
    cursor: not-allowed;
}
@keyframes recordPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

/* Voice equalizer bars */
.voice-equalizer {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 16px;
}
.voice-equalizer span {
    width: 3px;
    border-radius: 2px;
    background: currentColor;
    animation: eq-bar 0.8s ease-in-out infinite;
}
.voice-equalizer span:nth-child(1) { animation-delay: 0s;    height: 6px; }
.voice-equalizer span:nth-child(2) { animation-delay: 0.15s; height: 10px; }
.voice-equalizer span:nth-child(3) { animation-delay: 0.3s;  height: 14px; }
.voice-equalizer span:nth-child(4) { animation-delay: 0.45s; height: 8px; }
@keyframes eq-bar {
    0%,100% { transform: scaleY(0.3); }
    50%      { transform: scaleY(1); }
}

/* Send button: rounded, with icon */
.float-send-btn {
    background: var(--cyber-primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
}
.float-send-btn svg { flex-shrink: 0; }
.float-send-btn:hover { background: var(--accent-hover); box-shadow: 0 0 12px var(--accent-dim); }
.float-send-btn:active { transform: scale(0.97); }
.float-send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Bottom bar */
.floating-bottom-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 14px 10px;
    overflow-x: auto;
    scrollbar-width: none;
}
.floating-bottom-bar::-webkit-scrollbar { display: none; }

/* Chip buttons in bottom bar (快速 / skill shortcuts) */
.fbb-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 12px;
    white-space: nowrap;
    cursor: pointer;
    flex-shrink: 0;
    border: 1px solid color-mix(in srgb, var(--cyber-primary) 30%, transparent);
    color: color-mix(in srgb, var(--cyber-primary) 70%, transparent);
    background: transparent;
    transition: all 0.15s;
}
.fbb-chip:hover {
    color: var(--cyber-primary);
    border-color: var(--cyber-primary);
    background: rgba(0,240,255,0.08);
}
/* active = 快速/no-think selected */
.fbb-chip.fbb-chip-active {
    color: var(--cyber-primary);
    border-color: var(--cyber-primary);
    background: rgba(0,240,255,0.1);
}
/* deselected = thinking mode on */
.fbb-chip.fbb-chip-thinking {
    color: #f59e0b;
    border-color: #f59e0b;
    background: rgba(245,158,11,0.1);
}

/* Attached files */
.attached-files {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px 0;
}
.attached-files:empty { display: none; }

/* Drop overlay */
.input-drop-overlay {
    display: none;
    position: absolute;
    inset: 0;
    background: var(--accent-dim);
    border: 2px dashed var(--cyber-primary);
    border-radius: 16px;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--cyber-primary);
    z-index: 10;
    pointer-events: none;
}
.input-drop-overlay.active { display: flex; }

/* Voice status - inline in bottom bar */
.voice-status-inline {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

/* Input char count indicator */
.input-char-count {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
    margin-left: auto;
    opacity: 0.7;
    transition: color 0.2s;
}
.input-char-count.warn  { color: #f59e0b; opacity: 1; }
.input-char-count.error { color: #ef4444; opacity: 1; }

/* Quick skill actions */
.floating-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 0 12px 8px;
}
.floating-quick-actions:empty { display: none; }
.quick-skill-chip {
    padding: 3px 10px;
    border: 1px solid var(--cyber-border);
    border-radius: 20px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    background: transparent;
    transition: all 0.15s;
    white-space: nowrap;
}
.quick-skill-chip:hover { background: var(--nav-active-bg); color: var(--cyber-primary); border-color: var(--cyber-primary); }

/* ===== FULLSCREEN MODAL (editor / preview) ===== */
.fullscreen-modal {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    align-items: stretch;
    justify-content: stretch;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.15s ease;
}
.fullscreen-modal-inner {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--panel-bg);
    margin: 40px;
    border-radius: 12px;
    border: 1px solid var(--cyber-border);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--cyber-border);
    background: var(--bg-secondary);
    flex-shrink: 0;
}
.editor-filename {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 340px;
}
.editor-lang-badge {
    font-size: 11px;
    padding: 2px 7px;
    background: var(--accent-dim);
    border: 1px solid var(--cyber-border);
    border-radius: 4px;
    color: var(--cyber-primary);
    font-family: var(--font-mono);
    white-space: nowrap;
}
.editor-toolbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}
.editor-status { font-size: 12px; color: var(--text-muted); white-space: nowrap; }
.float-expand, .modal-close-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 5px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    transition: color 0.15s, background 0.15s;
}
.float-expand:hover, .modal-close-btn:hover { color: var(--cyber-primary); background: var(--nav-active-bg); }
.modal-close-btn { font-size: 18px; }

.code-editor {
    flex: 1;
    width: 100%;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: none;
    outline: none;
    resize: none;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
    padding: 16px;
    tab-size: 4;
}

.preview-area {
    flex: 1;
    overflow: auto;
    background: var(--bg-primary);
    padding: 20px;
}
.preview-placeholder {
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
    margin-top: 80px;
}

/* Editor send dialog (floating box over editor modal) */
.editor-send-dialog {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 600;
    background: var(--panel-bg);
    border: 1px solid var(--cyber-border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    width: 460px;
    max-width: 90vw;
    backdrop-filter: blur(12px);
}
.editor-send-dialog-inner { padding: 16px; }
.editor-send-dialog-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; font-weight: 500; }
.editor-send-dialog-inner textarea {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 13px;
    color: var(--text-primary);
    resize: vertical;
    outline: none;
    font-family: var(--font-ui);
}
.editor-send-dialog-inner textarea:focus { border-color: var(--cyber-primary); }
.editor-send-dialog-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 10px; }
.editor-send-confirm { background: var(--cyber-primary) !important; color: #fff !important; }

/* ===== SIDEBAR STORAGE BAR ===== */
.sidebar-storage {
    border-top: 1px solid var(--cyber-border);
    padding: 10px 14px;
    flex-shrink: 0;
}
.storage-label-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 5px;
}
.storage-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.storage-pct { font-size: 11px; font-family: var(--font-mono); color: var(--cyber-primary); font-weight: 600; }
.storage-bar-bg { height: 4px; background: var(--bg-tertiary); border-radius: 2px; overflow: hidden; margin-bottom: 4px; }
.storage-bar-fill { height: 100%; border-radius: 2px; background: linear-gradient(90deg, var(--cyber-primary), var(--accent-hover)); transition: width 0.5s ease; }
.storage-detail { font-size: 11px; color: var(--text-muted); }

/* ===== MODE BADGE (in right panel header) ===== */
.mode-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-family: var(--font-mono);
}
.mode-badge-api { background: var(--accent-dim); color: var(--cyber-primary); border: 1px solid var(--cyber-border); }
.mode-badge-cli { background: rgba(52,211,153,0.12); color: #34d399; border: 1px solid rgba(52,211,153,0.25); }
.mode-badge-hermes { background: rgba(167,139,250,0.12); color: #a78bfa; border: 1px solid rgba(167,139,250,0.25); }

/* ===== SCROLL BUTTONS — repositioned for new layout ===== */
.scroll-to-top-btn {
    position: absolute;
    bottom: var(--scroll-to-top-btn-bottom);
    right: 14px;
    width: 30px; height: 30px;
    border-radius: 50%;
    border: 1px solid var(--cyber-border);
    background: var(--panel-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-md);
    transition: opacity 0.15s, transform 0.15s, color 0.15s;
    z-index: 50; font-size: 11px;
    backdrop-filter: blur(8px);
}
.scroll-to-top-btn:hover { color: var(--cyber-primary); border-color: var(--cyber-primary); transform: translateY(-1px); }
.scroll-to-bottom-btn {
    position: absolute;
    bottom: var(--scroll-to-bottom-btn-bottom);
    right: 14px;
    width: 30px; height: 30px;
    border-radius: 50%;
    border: 1px solid var(--cyber-border);
    background: var(--panel-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-md);
    transition: opacity 0.15s, transform 0.15s, color 0.15s;
    z-index: 50; font-size: 11px;
    backdrop-filter: blur(8px);
}
.scroll-to-bottom-btn:hover { color: var(--cyber-primary); border-color: var(--cyber-primary); transform: translateY(-1px); }

/* ===== RESPONSIVE: hide right sidebar on narrow screens ===== */
@media (max-width: 1200px) {
    .right-sidebar { display: none; }
}
@media (max-width: 900px) {
    .header-nav span { display: none; }
    .header-skill-btn span { display: none; }
    .theme-btn span { display: none; }
}
@media (max-width: 640px) {
    .header-nav { display: none; }
    .fullscreen-modal-inner { margin: 0; border-radius: 0; }
}

/* ===== WELCOME MESSAGE ===== */
.welcome-message {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 60px;
    user-select: none;
}

/* Enhanced welcome screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px 32px;
    user-select: none;
    animation: msgFadeIn 0.3s ease;
}
.welcome-logo-wrap {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--accent-dim, rgba(0,240,255,0.08));
    border: 1px solid var(--cyber-border, rgba(0,240,255,0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.welcome-logo-svg {
    width: 28px;
    height: 28px;
    color: var(--cyber-primary, #00f0ff);
    opacity: 0.8;
}
.welcome-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.welcome-mode-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 28px;
}
.welcome-prompts {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 600px;
    margin-bottom: 20px;
}
.welcome-prompt-card {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.18s;
    max-width: 220px;
    font-size: 13px;
    color: var(--text-secondary);
}
.welcome-prompt-card:hover {
    border-color: var(--cyber-primary, #00f0ff);
    color: var(--text-primary);
    background: var(--accent-dim, rgba(0,240,255,0.06));
    transform: translateY(-2px);
}
.welcome-prompt-icon { font-size: 16px; flex-shrink: 0; }
.welcome-prompt-text { font-size: 12px; line-height: 1.4; }
.welcome-tip {
    font-size: 11px;
    color: var(--text-muted);
    opacity: 0.6;
}

/* Recent sessions on welcome screen */
.welcome-recent {
    margin-top: 20px;
    width: 100%;
    max-width: 480px;
}
.welcome-recent-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
    padding-left: 2px;
}
.welcome-recent-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.welcome-recent-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    min-width: 0;
}
.welcome-recent-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}
.welcome-recent-icon {
    font-size: 13px;
    color: var(--text-muted);
    flex-shrink: 0;
}
.welcome-recent-title {
    flex: 1;
    font-size: 13px;
    color: var(--text-primary);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.welcome-recent-time {
    font-size: 11px;
    color: var(--text-muted);
    flex-shrink: 0;
    white-space: nowrap;
}

/* ===== NAV PAGE VIEWS (history full, skills full, settings full) ===== */
.nav-page {
    position: absolute;
    inset: 0;
    background: var(--bg-primary);
    z-index: 200;
    display: none;
    flex-direction: column;
    overflow: hidden;
}
.nav-page.active { display: flex; }

/* ===== ABOUT PANEL ===== */
.about-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 0 20px;
    gap: 8px;
}
.about-logo { width: 60px; height: 60px; border-radius: 14px; }
.about-name { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.about-version { font-size: 13px; color: var(--text-muted); font-family: var(--font-mono); }
.move-confirm-actions { display: flex; gap: 6px; flex-shrink: 0; }


.text-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 6px 14px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}
.text-btn:hover { border-color: var(--cyber-primary); color: var(--cyber-primary); background: var(--nav-active-bg); }
.send-btn {
    background: var(--cyber-primary);
    border: none;
    border-radius: 7px;
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    transition: background 0.15s, box-shadow 0.15s;
}
.send-btn:hover { background: var(--accent-hover); box-shadow: 0 0 10px var(--accent-dim); }
.danger-btn { background: #e74c3c !important; }
.danger-btn:hover { background: #c0392b !important; }

/* ===== MODAL WIDE/LARGE/SMALL SIZES ===== */
.modal-wide .modal-content { width: 680px; max-width: 95vw; }
.modal-large .modal-content { width: 760px; max-width: 95vw; max-height: 85vh; }
.modal-small .modal-content { width: 380px; max-width: 95vw; }

/* ===== SESSION TITLE IN HEADER ===== */
.header-session-title {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

/* ===== HISTORY SEARCH ===== */
.history-search-wrap {
    padding: 12px 16px 8px;
    flex-shrink: 0;
}
.history-search-wrap input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}
.history-search-wrap input:focus { border-color: var(--cyber-primary); }


/* ===== NAV APPS MODAL ===== */
.nav-apps-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 4px 0;
}
.nav-app-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 88px;
    cursor: pointer;
    padding: 12px 6px 10px;
    border-radius: 12px;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s, transform 0.12s;
    text-decoration: none;
    color: inherit;
}
.nav-app-item:hover {
    background: var(--bg-secondary);
    border-color: var(--border);
    transform: translateY(-2px);
}
.nav-app-item:active { transform: translateY(0); }
.nav-app-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    object-fit: contain;
    flex-shrink: 0;
    background: var(--bg-secondary);
}
/* fallback gradient icon (canvas/div) */
.nav-app-icon-fallback {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    user-select: none;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.nav-app-name {
    font-size: 12px;
    line-height: 1.3;
    text-align: center;
    color: var(--text-secondary);
    word-break: break-all;
    max-width: 80px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}