/* ============================================
   OPEN NOTEBOOK - Modern Clean Design
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Modern Clean Palette */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f9fc;
    --bg-tertiary: #f0f4f8;
    --bg-hover: #e8f0fe;

    /* Text colors */
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #a0aec0;
    --ink-light: #cbd5e0;
    --ink-muted: #718096;

    /* Accent Colors - Sky-700 */
    --accent-primary: #0369a1;
    --accent-secondary: #0284c7;
    --accent-gradient: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    --accent-light: #f0f9ff;
    --accent-glow: rgba(3, 105, 161, 0.15);

    /* Semantic Colors */
    --accent-red: #ef4444;
    --accent-green: #07c160;
    --accent-amber: #f59e0b;

    /* Borders */
    --border-thin: 1px solid #e2e8f0;
    --border-medium: 1px solid #cbd5e0;
    --border-color: #e2e8f0;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-serif: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', Consolas, monospace;
    --font-display: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Reset & Base — scoped to NOTEX app only, not marketing landing */
*, *::before, *::after {
    box-sizing: border-box;
}
.app-container *, .app-container *::before, .app-container *::after,
.modal-overlay *, .loading-overlay * {
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: #f8fafc;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    overflow-y: auto;
}

/* Layout */
.app-container {
    display: flex !important;
    flex-direction: column !important;
    height: 100vh !important;
    overflow-y: auto !important;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-mark {
    width: 40px;
    height: 40px;
    color: var(--accent-primary);
    background: var(--accent-light);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
}

.logo-type {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text-primary);
}

.logo-tagline {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.btn-github {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

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

.btn-new-notebook {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #ffffff;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.btn-new-notebook:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-new-notebook:active {
    transform: translateY(0);
}

/* Main Grid */
.main-grid {
    display: grid;
    grid-template-columns: var(--left-width, 240px) 4px 1fr 4px var(--right-width, 360px);
    flex: 1;
    width: 100%;
    min-height: 0; /* Allow grid to shrink */
    overflow: hidden;
    background: var(--border-color);
    /* Remove transition to fix disappearing panel issue */
    gap: 0;
}

.main-grid.left-collapsed {
    grid-template-columns: 64px 0px 1fr 4px var(--right-width, 360px);
}

.main-grid.right-collapsed {
    grid-template-columns: var(--left-width, 240px) 4px 1fr 0px 64px;
}

.main-grid.left-collapsed.right-collapsed {
    grid-template-columns: 64px 0px 1fr 0px 64px;
}

.studio-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-bottom: none;
    min-height: 60px;
}

/* Left Panel Collapsed State Fixes */
.main-grid.left-collapsed .panel-left {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    width: 64px !important;
    min-width: 64px !important;
    padding: 0 !important;
    background: var(--bg-primary) !important;
    border-right: 1px solid var(--border-color);
    overflow: visible;
}

.main-grid.left-collapsed .panel-left .panel-header {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: flex-start !important;
    padding: var(--space-md) 0 !important;
    width: 100% !important;
    border-bottom: none !important;
    min-height: 60px;
}

.main-grid.left-collapsed .panel-left .panel-header .panel-title,
.main-grid.left-collapsed .sources-list-container {
    display: none !important;
}

.main-grid.left-collapsed .panel-left .panel-actions {
    display: flex !important;
    flex-direction: column-reverse !important; /* Move btnToggleLeft to the top */
    align-items: center !important;
    gap: var(--space-xl) !important;
    width: 100% !important;
}

.main-grid.left-collapsed #btnToggleLeft {
    transform: rotate(180deg) !important;
    margin: 0 auto !important;
}

.main-grid.left-collapsed #btnAddSource {
    width: 36px !important;
    height: 36px !important;
    background: #ffffff !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05) !important;
    border: 1px solid var(--border-color) !important;
    margin: 0 auto !important;
    padding: 0 !important;
}

.main-grid.left-collapsed #btnAddSource:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.main-grid.left-collapsed #resizerLeft {
    visibility: hidden;
    pointer-events: none;
    border: none !important;
}

.main-grid.right-collapsed #resizerRight {
    visibility: hidden;
    pointer-events: none;
    border: none !important;
}

.resizer {
    background: var(--bg-primary);
    cursor: col-resize;
    transition: background var(--transition-fast);
    position: relative;
    z-index: 20;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

.resizer:hover, .resizer.dragging {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.resizer::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: -4px;
    right: -4px;
}

.chat-messages-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--bg-primary);
}

.btn-toggle-side {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.btn-toggle-side:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

.main-grid.right-collapsed #btnToggleRight {
    transform: rotate(180deg) !important;
}

.main-grid.right-collapsed .panel-right {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    background: #fafcff;
    overflow: visible;
    width: 64px !important;
    padding: 0 !important;
    border-left: 1px solid #bae6fd;
}

.main-grid.right-collapsed .studio-header {
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    padding: var(--space-md) 0;
    width: 100% !important;
}

.main-grid.right-collapsed .panel-right .studio-header .panel-title,
.main-grid.right-collapsed .transform-custom-pill,
.main-grid.right-collapsed .section-notes {
    display: none;
}

.main-grid.right-collapsed .transform-grid {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: 6px !important;
    padding: 0 !important;
    width: 100% !important;
}

.main-grid.right-collapsed .transform-card {
    width: 42px !important;
    height: 42px !important;
    padding: 0 !important;
    justify-content: center !important;
    border-radius: 50% !important;
    background: var(--bg-secondary) !important;
}

.main-grid.right-collapsed .transform-info { display: none !important; }

.main-grid.right-collapsed .transform-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

.workspace-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.btn-share {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn-share.active {
    color: var(--accent-green);
    background: rgba(34, 197, 94, 0.15);
    border-color: var(--accent-green);
}

.btn-share.active:hover {
    background: rgba(34, 197, 94, 0.25);
}

.workspace-section {
    padding-top: 0;
    padding-bottom: var(--space-md);
    border-bottom: none;
}

/* Studio header with sky accent */
.section-transform {
    background: linear-gradient(180deg, #e0f2fe 0%, #fafcff 60%);
    border-bottom: 1px solid #bae6fd;
    padding-bottom: var(--space-lg);
}

.studio-header {
    padding: var(--space-lg) var(--space-lg) var(--space-sm) var(--space-lg) !important;
    border-bottom: none !important;
    min-height: unset !important;
}

.studio-header .panel-title {
    color: #0369a1;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.18em;
}

/* ── Studio Transform Cards ─────────────────────────────── */
.transform-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    padding: 0 var(--space-lg);
    margin-bottom: 0;
}

.transform-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 10px 9px 10px;
    gap: 6px;
    border-radius: 12px;
    border: 1px solid #e0f2fe;
    cursor: pointer;
    background: #ffffff;
    transition: all 0.16s ease;
    text-align: left;
    box-shadow: 0 1px 3px rgba(3,105,161,0.06);
}

.transform-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(3,105,161,0.16);
    border-color: #7dd3fc;
    background: #f0f9ff;
}

.transform-card:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(3,105,161,0.12);
}

.transform-icon {
    width: 32px;
    height: 32px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tc-blue   { background: #dbeafe; color: #1d4ed8; }
.tc-green  { background: #dcfce7; color: #16a34a; }
.tc-amber  { background: #fef9c3; color: #b45309; }
.tc-purple { background: #f3e8ff; color: #7c3aed; }
.tc-rose   { background: #ffe4e6; color: #e11d48; }
.tc-orange { background: #ffedd5; color: #c2410c; }
.tc-teal   { background: #ccfbf1; color: #0d9488; }
.tc-indigo { background: #e0e7ff; color: #4338ca; }
.tc-sky    { background: #dbeafe; color: #1e40af; }

.transform-icon svg { width: 16px; height: 16px; }

.transform-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
    width: 100%;
}

.transform-name {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.transform-desc {
    font-size: 0.65rem;
    color: #64748b;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.transform-custom-pill {
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 2px 4px 2px 16px;
    margin-top: var(--space-lg);
    transition: border-color var(--transition-normal);
}

.transform-custom-pill:focus-within {
    border-color: var(--accent-primary);
}

.transform-custom-pill input {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--space-sm) 0;
    font-size: 0.85rem;
    outline: none;
}

.transform-custom-pill button {
    background: transparent;
    border: none;
    color: var(--accent-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    padding: var(--space-sm) var(--space-lg);
    cursor: pointer;
}

.transform-custom-pill button:hover {
    opacity: 0.8;
}

.section-notes {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    border-top: 1px solid #bae6fd;
    margin-top: 0;
}

.section-notes .panel-header {
    padding: var(--space-md) var(--space-lg);
    background: #fafcff;
    border-bottom: 1px solid #e0f2fe;
}

.section-notes .panel-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: #0369a1;
    letter-spacing: 0.08em;
}

.notes-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md) var(--space-md) var(--space-xl) var(--space-md);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.note-item {
    padding: 10px 12px;
    border-radius: 10px;
    background: #ffffff;
    border: 1px solid #e0f2fe;
    border-left: 3px solid #0369a1;
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: 0 1px 3px rgba(3,105,161,0.05);
}

.note-item:hover {
    border-color: #7dd3fc;
    border-left-color: #0369a1;
    box-shadow: 0 4px 12px rgba(3,105,161,0.12);
    transform: translateX(2px);
}

/* Panel Base */
.panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
}

.panel-left {
    background: var(--bg-secondary);
}

.panel-center {
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    min-width: 300px; /* Ensure a minimum width for the chat area */
    height: 100%;
    z-index: 1;
}

.chat-messages-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--bg-primary);
    position: relative;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    background: var(--bg-primary);
}

.panel-right {
    background: #fafcff;
    border-left: 1px solid #e0f2fe;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--border-color);
}

.panel-title {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
}

.panel-count {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    padding: 2px 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.panel-actions {
    display: flex;
    gap: var(--space-sm);
}

/* Buttons */
.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-icon:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-text {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-primary);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

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

.btn-secondary {
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #ffffff;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-close {
    width: 28px;
    height: 28px;
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

/* Notebook List */
.notebook-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.notebook-item {
    position: relative;
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.notebook-item:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.notebook-item.active {
    border-color: var(--accent-primary);
    background: var(--accent-light);
    box-shadow: var(--shadow-md);
}

.notebook-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.notebook-icon {
    color: var(--accent-primary);
    flex-shrink: 0;
}

.notebook-name {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.notebook-meta {
    display: flex;
    gap: var(--space-md);
    padding-left: 24px;
}

.notebook-sources,
.notebook-notes {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

.btn-delete-notebook {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 20px;
    height: 20px;
    color: var(--text-light);
    background: transparent;
    border: none;
    cursor: pointer;
    opacity: 1;
    transition: all var(--transition-fast);
}

.btn-delete-notebook:hover {
    color: var(--accent-red);
}

/* Sources Grid */
.sources-list-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.source-card {
    position: relative;
    padding: var(--space-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 4px;
    border-left: 4px solid var(--accent-primary); /* Default color bar */
}

.source-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}

.source-card[data-type="file"] { border-left-color: #ef4444; }
.source-card[data-type="url"] { border-left-color: #3b82f6; }
.source-card[data-type="text"] { border-left-color: #10b981; }

.source-type-badge {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    font-family: var(--font-display);
    font-size: 0.55rem;
    font-weight: 800;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.source-icon {
    display: none; /* Hide large icon in compact list */
}

.source-name {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    padding-right: 40px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.source-details-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.source-meta {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

.source-chunks {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    width: fit-content;
    color: var(--text-secondary);
}

.chunk-count {
    font-weight: 700;
}

.btn-remove-source {
    position: absolute;
    bottom: var(--space-sm);
    right: var(--space-sm);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: transparent;
    border: none;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 1;
    transition: all var(--transition-fast);
}

.btn-remove-source:hover {
    background: #fee2e2;
    color: var(--accent-red);
}

/* Panel Tabs */
.panel-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: var(--space-md);
    padding: 0 var(--space-md);
}

.tab-btn {
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
}

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

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

.tab-btn .tab-close {
    margin-left: 8px;
    font-size: 14px;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.tab-btn .tab-close:hover {
    opacity: 1;
    color: var(--accent-red);
}

.tab-btn[data-tab="note"],
.tab-btn[data-tab="notes_list"] {
    display: none;
}

.tab-btn[data-tab="note"].active,
.tab-btn[data-tab="notes_list"].active,
.tab-btn[data-tab="notes_list"]:not(.hidden) {
    display: flex;
}

.tab-btn.hidden {
    display: none !important;
}

.tab-content {
    display: none;
    flex: 1;
    overflow: hidden;
}

/* Notes Grid in Center Panel */
.notes-details-view {
    display: none;
    flex-direction: column;
    height: 100%;
    background: var(--bg-secondary);
    padding: var(--space-xl);
    overflow-y: auto;
}

.notes-compact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-lg);
    width: 100%;
}

.compact-note-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
    border-left: 4px solid var(--accent-primary);
}

.btn-delete-compact-note {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 20px;
    height: 20px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    opacity: 1;
    transition: all var(--transition-fast);
    border-radius: var(--radius-full);
}

.btn-delete-compact-note:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

.compact-note-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.compact-note-card .note-type {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
}

.compact-note-card .note-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0;
    padding: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.compact-note-card .note-preview {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}

.compact-note-card .note-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4px;
    font-size: 0.65rem;
    color: var(--text-light);
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

/* Notes List */
.notes-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

/* Infographic Styles */
.infographic-error-banner {
    margin: 1.5rem 0;
    padding: var(--space-md);
    background: #fff5f5;
    border: 1px solid #fed7d7;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.error-banner-content {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    color: #c53030;
    margin-bottom: var(--space-md);
}

.error-banner-content svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.error-banner-content strong {
    display: block;
    margin-bottom: var(--space-xs);
}

.error-banner-content p {
    margin: 0;
    font-size: 0.875rem;
}

.error-banner-prompt {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.error-banner-prompt strong {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.error-banner-prompt pre {
    margin: 0;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
}

.infographic-container {
    margin: 1.5rem 0;
    padding: var(--space-md);
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-md);
    overflow: hidden;
}

.infographic-image {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    cursor: zoom-in;
    transition: opacity 0.15s;
}

.infographic-image:hover {
    opacity: 0.92;
}

/* Lightbox overlay */
.infographic-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    cursor: zoom-out;
    padding: 1rem;
    animation: fadeIn 0.15s ease;
}
.infographic-lightbox img {
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}
.infographic-lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.8;
    background: none;
    border: none;
    padding: 0;
}
.infographic-lightbox-close:hover { opacity: 1; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* PPT Viewer Styles */
.ppt-viewer-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-lg);
}

.ppt-slides-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.ppt-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    align-items: center;
    justify-content: center;
}

.ppt-slide.active {
    display: flex;
}

.ppt-slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.ppt-slide-counter {
    position: absolute;
    bottom: var(--space-md);
    right: var(--space-md);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.ppt-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    padding: 0 var(--space-md);
    pointer-events: none;
}

.btn-ppt-nav {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    pointer-events: auto;
}

.btn-ppt-nav:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

/* Charts Viewer Styles */
.charts-container {
    margin: 1.5rem 0;
    padding: var(--space-md);
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.chart-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chart-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.chart-div {
    width: 100%;
    min-height: 400px;
    border-radius: var(--radius-md);
}

.infographic-actions {
    display: flex;
    justify-content: center;
    width: 100%;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border-color);
}


/* 定义角度变量，用于平滑动画 */
@property --gradient-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

.transform-card.loading,
#btnCustomTransform.loading {
    pointer-events: none;
    position: relative;
    z-index: 1;
}

.transform-card.loading::after,
#btnCustomTransform.loading::after {
    content: '';
    position: absolute;
    inset: -2px; 
    padding: 2px; 
    border-radius: inherit;
    /* 使用 currentColor 自动匹配同色系深色，并增加尾部渐变 */
    background: conic-gradient(
        from var(--gradient-angle), 
        transparent 0% 75%, 
        currentColor 100%
    );
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: snake-rotate 1.5s linear infinite;
    z-index: 2;
}

@keyframes snake-rotate {
    from { --gradient-angle: 0deg; }
    to { --gradient-angle: 360deg; }
}

.note-item.placeholder {
    border-left: 4px solid var(--text-light);
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    animation: placeholder-shimmer 2s ease-in-out infinite;
    position: relative;
    overflow: hidden;
    padding: var(--space-lg);
}

.note-item.placeholder .note-title {
    font-size: 1rem;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.note-item.placeholder .note-title::before {
    content: '';
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--accent-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

.note-item.placeholder .note-preview {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--space-sm);
    line-height: 1.5;
}

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

.note-item.placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    transform: translateX(-100%);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    100% { transform: translateX(100%); }
}

@keyframes placeholder-shimmer {
    0%, 100% { border-left-color: var(--text-light); }
    50% { border-left-color: var(--accent-primary); }
}

.note-item {
    position: relative;
    padding: var(--space-md);
    margin-bottom: var(--space-md);
    background: var(--paper-bg);
    border: var(--border-thin);
    border-left: 3px solid var(--ink-light);
}

.note-item:hover {
    border-left-color: var(--ink-muted);
}

.note-type-badge {
    display: none;
}

.note-title {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--ink-primary);
    margin-bottom: var(--space-sm);
}

.note-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-height: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
}

/* ============================================
   MARKDOWN RENDERING STYLES
   ============================================ */

.markdown-content {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    margin-top: 1.5em;
    margin-bottom: 0.75em;
    line-height: 1.3;
}

.markdown-content h1 {
    font-size: 1.75rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5em;
}

.markdown-content h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.4em;
}

.markdown-content h3 {
    font-size: 1.25rem;
}

.markdown-content h4 {
    font-size: 1.1rem;
}

.markdown-content h5 {
    font-size: 1rem;
}

.markdown-content h6 {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.markdown-content p {
    margin-bottom: 1em;
}

.markdown-content a {
    color: var(--accent-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-fast);
}

.markdown-content a:hover {
    color: var(--accent-secondary);
    border-bottom-color: var(--accent-secondary);
}

.markdown-content strong,
.markdown-content b {
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content em,
.markdown-content i {
    font-style: italic;
}

.markdown-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: var(--accent-primary);
}

.markdown-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
    margin-bottom: 1em;
}

.markdown-content pre code {
    background: transparent;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.markdown-content ul,
.markdown-content ol {
    padding-left: 1.5em;
    margin-bottom: 1em;
}

.markdown-content li {
    margin-bottom: 0.5em;
}

.markdown-content li > ul,
.markdown-content li > ol {
    margin-bottom: 0;
}

.markdown-content ul li {
    list-style-type: disc;
}

.markdown-content ul li ul li {
    list-style-type: circle;
}

.markdown-content ul li ul li ul li {
    list-style-type: square;
}

.markdown-content ol li {
    list-style-type: decimal;
}

.markdown-content blockquote {
    border-left: 4px solid var(--accent-primary);
    padding-left: var(--space-md);
    margin: 1em 0;
    color: var(--text-secondary);
    background: var(--accent-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: var(--space-sm) var(--space-md);
}

.markdown-content blockquote p {
    margin-bottom: 0;
}

.markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
    font-size: 0.9rem;
}

.markdown-content table thead {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
}

.markdown-content table th {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content table td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.markdown-content table tbody tr:hover {
    background: var(--bg-secondary);
}

.markdown-content table tbody tr:last-child td {
    border-bottom: none;
}

.markdown-content hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 2em 0;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 1em 0;
}

.mermaid-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin: 1.5em 0;
    padding: var(--space-md);
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: auto;
    max-height: 85vh;
    box-sizing: border-box;
}

.mermaid-diagram svg {
    display: block;
    max-width: 100%;
    height: auto;
}

.markdown-content dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-sm) var(--space-md);
    margin-bottom: 1em;
}

.markdown-content dt {
    font-weight: 600;
    color: var(--text-primary);
}

.markdown-content dd {
    color: var(--text-secondary);
}

.markdown-content details {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: 1em;
}

.markdown-content details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--accent-primary);
    user-select: none;
}

.markdown-content details[open] summary {
    margin-bottom: var(--space-sm);
}

.markdown-content .task-list-item {
    list-style-type: none;
}

.markdown-content .task-list-item input {
    margin-right: var(--space-sm);
    accent-color: var(--accent-primary);
}

/* MathJax styles */
.markdown-content .math,
.markdown-content span[id^='MathJax'],
.markdown-content mjx-container {
    color: var(--text-primary);
}

.markdown-content mjx-container {
    margin: 0.5em 0;
}

.markdown-content mjx-container[jax='CHTML'][display='true'] {
    margin: 1em 0;
}

/* Fix for inline math */
.markdown-content mjx-container[jax='CHTML'][display='true'] {
    display: inline;
    margin: 0;
}

/* Display math (block) */
.markdown-content .mjx-chtml {
    font-size: 110%;
}

/* Chat message MathJax styles */
.message-text mjx-container {
    margin: 0.3em 0;
}

.message-text mjx-container[jax='CHTML'][display='true'] {
    display: inline;
    margin: 0;
}

.note-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--ink-light);
}

.note-date {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--ink-muted);
}

.note-sources {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--ink-light);
}

.btn-delete-note {
    position: absolute;
    bottom: var(--space-sm);
    right: var(--space-sm);
    color: var(--ink-light);
    background: transparent;
    border: none;
    cursor: pointer;
    opacity: 1;
    transition: all var(--transition-fast);
}

.btn-delete-note:hover {
    color: var(--accent-red);
}

/* Chat */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
}

.chat-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-muted);
}

.chat-welcome svg {
    margin-bottom: var(--space-md);
    opacity: 0.4;
}

.chat-welcome h3 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.chat-welcome p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.chat-message {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    animation: messageIn 0.3s ease;
}

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.chat-message[data-role="user"] {
    flex-direction: row-reverse;
}

.chat-message[data-role="user"] .message-avatar {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.chat-message[data-role="assistant"] .message-avatar {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.message-content {
    flex: 1;
    max-width: 85%;
    display: flex;
    flex-direction: column;
}

.chat-message[data-role="user"] .message-content {
    align-items: flex-end;
}

.chat-message[data-role="assistant"] .message-content {
    align-items: flex-start;
}

.message-text {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    width: fit-content;
    word-break: break-word;
}

/* Markdown in chat messages */
.message-text p {
    margin-bottom: 0.5em;
}

.message-text p:last-child {
    margin-bottom: 0;
}

.message-text code {
    font-family: var(--font-mono);
    font-size: 0.8em;
    background: rgba(0, 0, 0, 0.1);
    padding: 0.15em 0.35em;
    border-radius: 3px;
}

.chat-message[data-role="user"] .message-text code {
    background: rgba(255, 255, 255, 0.2);
}

.message-text pre {
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    overflow-x: auto;
    margin: 0.5em 0;
}

.chat-message[data-role="user"] .message-text pre {
    background: rgba(255, 255, 255, 0.15);
}

.message-text pre code {
    background: transparent;
    padding: 0;
}

.message-text ul,
.message-text ol {
    margin: 0.5em 0;
    padding-left: 1.2em;
}

.message-text li {
    margin-bottom: 0.25em;
}

.message-text strong {
    font-weight: 600;
}

.message-text a {
    color: inherit;
    text-decoration: underline;
}

.chat-message[data-role="user"] .message-text {
    background: var(--accent-gradient);
    color: #ffffff;
    border-bottom-right-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.chat-message[data-role="assistant"] .message-text {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-text p {
    margin-bottom: var(--space-sm);
}

.message-text p:last-child {
    margin-bottom: 0;
}

.message-sources {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--ink-light);
}

.chat-message[data-role="user"] .message-sources {
    justify-content: flex-end;
}

.source-tag {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 2px 8px;
    background: var(--paper-dark);
    color: var(--ink-muted);
    border-radius: 3px;
}

/* Thinking animation */
.thinking-dots {
    display: flex;
    gap: 5px;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    width: fit-content;
    border: 1px solid var(--border-color);
}

.thinking-dots span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: thinking-bounce 1.2s ease-in-out infinite;
    opacity: 0.4;
}

.thinking-dots span:nth-child(1) { animation-delay: 0s; }
.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes thinking-bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* Starter prompt chips */
.chat-starter-prompts {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px 16px 6px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.starter-chip {
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid #bae6fd;
    background: #f0f9ff;
    color: #0369a1;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.16s ease;
    white-space: normal;
    word-break: break-word;
}

.starter-chip:hover {
    background: #0369a1;
    border-color: #0369a1;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(3,105,161,0.2);
}

.starter-chip-loading {
    opacity: 0.55;
    cursor: default;
    animation: pulse 1.4s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 0.9; }
}

.chat-input-wrapper {
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-primary);
}

.chat-form {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    outline: none;
    transition: all var(--transition-normal);
}

.chat-input:focus {
    border-color: var(--accent-primary);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.chat-input::placeholder {
    color: var(--text-light);
}

.btn-send {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.btn-send:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-send:active {
    transform: scale(0.95);
}

/* Transform */
.transform-options {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.transform-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.transform-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--paper-bg);
    border: var(--border-thin);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.transform-card:hover {
    border-color: var(--ink-muted);
    background: var(--paper-light);
}

.transform-card.loading {
    background: #e8f0f3;
    cursor: not-allowed;
    opacity: 1;
    border: 2px solid var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-md);
}

.transform-card.loading .transform-icon {
    animation: pulse-icon 1.5s ease-in-out infinite;
}

.transform-card.loading .transform-icon svg {
    color: var(--accent-primary);
}

.transform-card.loading .hourglass-icon {
    animation: spin 3s linear infinite;
    color: var(--accent-primary);
}

.transform-card.loading .transform-name {
    color: var(--accent-primary);
    font-weight: 700;
}

@keyframes pulse-icon {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.transform-icon {
    font-size: 1.5rem;
}

.transform-name {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--ink-secondary);
}

.transform-custom {
    padding: var(--space-md);
    background: var(--paper-dark);
    border: var(--border-thin);
}

.input-label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--ink-secondary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
}

.input-field,
.custom-prompt {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-normal);
    resize: vertical;
}

.input-field:focus,
.custom-prompt:focus {
    border-color: var(--accent-primary);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-field::placeholder,
.custom-prompt::placeholder {
    color: var(--text-light);
}

.input-field.font-mono {
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.custom-prompt {
    margin-bottom: var(--space-md);
    min-height: 80px;
}

/* Footer */
.app-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    gap: var(--space-xs);
}

.footer-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.footer-status {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* Hide footer info completely */
.footer-info {
    display: none;
}

.footer-divider {
    color: var(--text-light);
}

.footer-stats {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-secondary);
}

.footer-credit {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.footer-credit a {
    color: var(--accent-primary);
    text-decoration: none;
}

.footer-credit a:hover {
    text-decoration: underline;
}

/* Empty States */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--ink-muted);
    padding: var(--space-xl);
}

.empty-state svg {
    margin-bottom: var(--space-md);
    opacity: 0.3;
}

.empty-state p {
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
}

.empty-hint {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--ink-light);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: none;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.modal.active {
    display: flex;
}

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

.modal-header h3 {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    flex: 1;
}

.modal-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.btn-copy-note {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-copy-note:hover {
    color: var(--accent-primary);
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-copy-note.copied {
    color: var(--accent-green);
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--accent-green);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-md);
}

/* Source Tabs */
.source-tabs {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    border-bottom: var(--border-thin);
}

.source-tab {
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--ink-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.source-tab:hover {
    color: var(--ink-secondary);
}

.source-tab.active {
    color: var(--ink-primary);
    border-bottom-color: var(--ink-primary);
}

.source-content {
    display: none;
}

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

/* Drop Zone */
.drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    border: 2px dashed var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent-primary);
    background: var(--accent-light);
}

.drop-zone svg {
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
}

.drop-zone p {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.drop-hint {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.9);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--ink-light);
    border-top-color: var(--paper-bg);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    margin-top: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--paper-bg);
    letter-spacing: 0.1em;
}

.hidden {
    display: none !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 4px;
    border: 2px solid var(--bg-secondary);
}

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

/* Landing Page */
.landing-page {
    flex: 1;
    padding: var(--space-2xl) var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.landing-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--space-2xl);
}

.landing-brand h1 {
    font-family: var(--font-sans);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.landing-brand p {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-muted);
}

.btn-large {
    padding: var(--space-md) var(--space-2xl);
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

/* Public Showcase - Horizontal Scroll */
.public-showcase {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid #10b981;
}

.public-showcase-header {
    margin-bottom: var(--space-lg);
}

.public-showcase-title {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.public-showcase-subtitle {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.public-showcase-scroll {
    padding-top: 10px !important;
    overflow-x: auto;
    overflow-y: hidden;
    /* Force horizontal scroll */
    display: flex;
    flex-direction: row;
    /* Hide scrollbar but keep functionality */
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.public-showcase-scroll::-webkit-scrollbar {
    height: 8px;
}

.public-showcase-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.public-showcase-scroll::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.public-showcase-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.public-showcase-grid {
    display: flex;
    flex-direction: row;
    gap: var(--space-lg);
    min-width: min-content;
    padding-bottom: var(--space-sm);
}

.public-showcase-card {
    flex: 0 0 320px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    min-height: 180px;
    box-shadow: var(--shadow-md);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    position: relative;
}

.public-showcase-card.has-cover-image {
    background-size: cover !important;
    background-position: center !important;
    background-repeat: no-repeat;
}

.public-showcase-card.has-cover-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.3));
    pointer-events: none;
    z-index: 1;
}

.public-showcase-card-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.public-showcase-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

/* Text styles for cards with cover image */
.public-showcase-card.has-cover-image .public-showcase-card-title,
.public-showcase-card.has-cover-image .public-showcase-card-desc,
.public-showcase-card.has-cover-image .public-showcase-card-footer,
.public-showcase-card.has-cover-image .public-showcase-card-stats,
.public-showcase-card.has-cover-image .public-showcase-card-date {
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.public-showcase-card.has-cover-image .public-showcase-card-icon {
    background: rgba(255, 255, 255, 0.25);
    color: white;
}

.public-showcase-card-header {
    display: none;
}

.public-showcase-card-icon {
    display: none;
}

.public-showcase-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    text-align: center;
}

/* Text styles for cards with cover image */
.public-showcase-card.has-cover-image .public-showcase-card-title {
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.public-showcase-card-desc {
    display: none;
}

.public-showcase-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--space-sm);
}

.public-showcase-card-stats {
    display: flex;
    gap: var(--space-md);
    font-size: 0.875rem;
}

.public-showcase-card-date {
    font-size: 0.875rem;
}

.notebook-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.notebook-card {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    min-height: 200px;
    box-shadow: var(--shadow-md);
}

.notebook-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

.notebook-card-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-primary);
    background: var(--accent-light);
    border-radius: var(--radius-lg);
    padding: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.notebook-card-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.notebook-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.notebook-card-stats {
    display: flex;
    gap: var(--space-md);
}

.stat-sources,
.stat-notes,
.stat-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 2px 10px;
    border-radius: var(--radius-full);
}

.btn-delete-card {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    opacity: 0;
}

.notebook-card:hover .btn-delete-card {
    opacity: 1;
}

.btn-delete-card:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

.btn-share-card {
    width: 22px;
    height: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0.5;
    margin-left: auto;
    flex-shrink: 0;
}

.btn-share-card:hover {
    opacity: 1;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
}

.notebook-card:hover .btn-share-card {
    opacity: 0.7;
}

.btn-share-card.active {
    opacity: 1;
    color: var(--accent-green);
    background: rgba(34, 197, 94, 0.15);
}

.btn-share-card.active:hover {
    background: rgba(34, 197, 94, 0.25);
}

.notebook-card-stats {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Workspace Navigation */
.workspace-container {
    display: flex;
    flex-direction: column;
    flex: 1 1 0%;
    min-height: 0;
    overflow: hidden; /* Prevent pushing footer out */
}

.workspace-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.btn-back {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.current-notebook-info h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.notebook-name-display {
    cursor: default;
    transition: all var(--transition-fast);
}

.notebook-name-display.editable {
    cursor: pointer;
}

.notebook-name-display.editable:hover {
    color: var(--accent-primary);
}

.notebook-name-editor {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.notebook-name-editor.hidden {
    display: none;
}

.notebook-name-input {
    font-size: 1.1rem;
    font-weight: 600;
    padding: 4px 8px;
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    min-width: 200px;
}

.notebook-name-input:focus {
    box-shadow: 0 0 0 2px var(--accent-light);
}

.notebook-name-actions {
    display: flex;
    gap: var(--space-xs);
}

.notebook-name-actions .btn-save {
    color: var(--accent-primary);
}

.notebook-name-actions .btn-save:hover {
    background: var(--accent-light);
}

.notebook-name-actions .btn-cancel {
    color: var(--text-secondary);
}

.notebook-name-actions .btn-cancel:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Note View Container */
.note-view-container {
    display: none;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.note-view-container[style*="flex"] {
    display: flex;
}

.note-view-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.note-view-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.note-view-type {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    background: var(--accent-light);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.note-view-title-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.note-view-actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Download / action buttons in note header */
.btn-note-action {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    border-radius: 7px;
    border: 1px solid #bae6fd;
    background: #f0f9ff;
    color: #0369a1;
    font-size: 11.5px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    white-space: nowrap;
}

.btn-note-action:hover {
    background: #e0f2fe;
    border-color: #0369a1;
}

.note-view-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl) var(--space-2xl);
    width: 100%;
    box-sizing: border-box;
}

.markdown-content {
    width: 100%;
}

.note-view-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--border-color);
}

/* Note item selected state */
.note-item.selected {
    border-left-color: var(--accent-primary) !important;
    background: var(--accent-light) !important;
    box-shadow: var(--shadow-md);
}

.note-item.selected .note-title {
    color: var(--accent-primary);
}

/* Mobile bottom nav — hidden on desktop */
.mobile-bottom-nav { display: none; }
.mob-nav-btn       { display: none; }

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE — MOBILE (≤ 768px)
   One panel visible at a time; bottom nav to switch between them.
═══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

    /* ─ Global touch polish ──────────────────────────────────── */
    * { -webkit-tap-highlight-color: transparent; }

    /* ─ Workspace nav ────────────────────────────────────────── */
    .workspace-nav {
        padding: 8px 10px;
        gap: 6px;
    }

    .btn-label,
    #shareButtonText {
        display: none !important;
    }

    #currentNotebookName {
        font-size: 0.88rem;
        max-width: 38vw;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* Workspace nav buttons: proper 40px tap targets */
    .workspace-nav .btn-icon,
    .workspace-nav button {
        min-width: 40px;
        min-height: 40px;
    }

    /* ─ Header ──────────────────────────────────────────────── */
    header h1 { font-size: 1.5rem !important; }

    /* ─ Main grid → one-panel-at-a-time ─────────────────────── */
    .main-grid {
        display: block !important;
        position: relative !important;
        grid-template-columns: none !important;
        overflow: hidden !important;
    }

    .panel-left,
    .panel-center,
    .panel-right {
        position: absolute !important;
        inset: 0 !important;
        width: 100% !important;
        min-width: 0 !important;
        display: none !important;
    }

    .panel-left.mob-active,
    .panel-center.mob-active,
    .panel-right.mob-active {
        display: flex !important;
    }

    .main-grid.left-collapsed,
    .main-grid.right-collapsed,
    .main-grid.left-collapsed.right-collapsed {
        grid-template-columns: none !important;
    }

    .panel-right {
        flex-direction: column !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch;
    }

    .resizer { display: none !important; }

    #btnToggleLeft,
    #btnToggleRight { display: none !important; }

    /* ─ Chat area ────────────────────────────────────────────── */
    .chat-messages-wrapper {
        flex: 1 !important;
        min-height: 0 !important;
    }

    .chat-messages {
        flex: 1 !important;
        padding: 12px !important;
        -webkit-overflow-scrolling: touch;
    }

    .chat-message { max-width: 96% !important; }

    .message-text {
        font-size: 0.92rem !important;
        line-height: 1.55 !important;
    }

    /* iOS: prevent auto-zoom on all inputs (must be ≥16px) */
    .chat-input,
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="url"],
    textarea,
    select {
        font-size: 16px !important;
    }

    .chat-input { padding: 12px 14px !important; }

    .chat-input-wrapper { padding: 8px 10px 10px !important; }

    .btn-send {
        min-width: 44px;
        min-height: 44px;
    }

    /* ─ Sources panel ────────────────────────────────────────── */
    .sources-list-container {
        flex: 1;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .source-card {
        min-height: 54px;
        padding: 12px 14px !important;
    }

    .source-name { font-size: 0.88rem !important; }
    .source-meta { font-size: 0.75rem !important; }

    /* Add source button: full-width, easily tappable */
    .btn-add-source,
    .panel-header .btn-primary,
    .panel-header .btn-secondary {
        min-height: 40px;
    }

    /* ─ Studio panel header ──────────────────────────────────── */
    .panel-header { padding: 10px 14px !important; }
    .panel-title  { font-size: 0.75rem !important; letter-spacing: 0.06em; }

    /* ─ Studio transform cards ───────────────────────────────── */
    .transform-options {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .transform-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        padding: 0 12px 12px !important;
    }

    .transform-card {
        padding: 14px 10px !important;
        min-height: 78px;
        border-radius: 12px !important;
    }

    .transform-name { font-size: 0.8rem  !important; }
    .transform-desc { font-size: 0.68rem !important; }

    /* ─ Notes list ───────────────────────────────────────────── */
    .notes-list {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .note-item {
        min-height: 54px;
        padding: 12px !important;
    }

    .compact-note-card .note-preview { display: none; }
    .compact-note-card { padding: var(--space-sm); }

    .notes-compact-grid {
        grid-template-columns: 1fr !important;
    }

    /* ─ Note view: fullscreen overlay inside center panel ────── */
    .note-view-container {
        position: absolute !important;
        inset: 0 !important;
        z-index: 10 !important;
        background: var(--bg-primary) !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
        display: none;
        flex-direction: column;
    }

    .note-view-container[style*="flex"] {
        display: flex !important;
    }

    .note-view-header {
        padding: 10px 12px !important;
        flex-wrap: wrap;
        gap: 8px;
        position: sticky;
        top: 0;
        background: var(--bg-primary);
        z-index: 1;
        border-bottom: 1px solid var(--border-color);
    }

    .note-view-actions {
        gap: 6px;
        flex-wrap: wrap;
    }

    .btn-note-action {
        min-height: 36px;
        font-size: 0.78rem !important;
        padding: 6px 12px !important;
    }

    .btn-copy-note {
        min-width: 36px;
        min-height: 36px;
    }

    .note-view-content {
        padding: 14px !important;
        font-size: 0.92rem;
        line-height: 1.65;
    }

    .markdown-content h1 { font-size: 1.3rem !important; }
    .markdown-content h2 { font-size: 1.1rem !important; }
    .markdown-content h3 { font-size: 0.98rem !important; }

    /* ─ Landing / notebook grid ─────────────────────────────── */
    .landing-page .max-w-6xl {
        padding-left: 16px;
        padding-right: 16px;
        padding-top: 20px;
    }

    .notebook-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }

    .notebook-card { min-height: 80px; }

    /* ─ Status footer ────────────────────────────────────────── */
    .app-footer { display: none !important; }

    /* ─ Workspace: room for fixed bottom nav ─────────────────── */
    .workspace-container { padding-bottom: 60px; }

    /* ─ Mobile bottom navigation ─────────────────────────────── */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 60px;
        background: #ffffff;
        border-top: 1px solid #e2e8f0;
        z-index: 200;
        box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.08);
        padding-bottom: env(safe-area-inset-bottom, 0px);
    }

    .mob-nav-btn {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        border: none;
        background: transparent;
        color: #94a3b8;
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.04em;
        text-transform: uppercase;
        cursor: pointer;
        padding: 8px 4px;
        transition: color 0.15s ease;
        min-height: 44px;
    }

    .mob-nav-btn svg {
        width: 22px;
        height: 22px;
        stroke: currentColor;
        flex-shrink: 0;
    }

    .mob-nav-btn.mob-nav-active { color: var(--accent-primary); }

    /* Active state visual feedback */
    .mob-nav-btn:active { opacity: 0.7; }

    /* ─ Modals: slide up as bottom sheet ─────────────────────── */
    .modal-overlay.active {
        align-items: flex-end !important;
    }

    .modal {
        border-radius: 20px 20px 0 0 !important;
        max-height: 92dvh !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
    }

    .modal-header {
        padding: 16px 20px 14px !important;
        position: sticky;
        top: 0;
        background: inherit;
        z-index: 1;
    }

    .modal-body { padding: 16px 20px 24px !important; }

    .modal-actions {
        padding-top: 16px;
        gap: 10px;
    }

    .btn-primary,
    .btn-secondary {
        min-height: 44px;
        font-size: 0.92rem;
    }

    .input-field {
        min-height: 44px;
        padding: 10px 14px !important;
    }

    /* ─ Advogado modal option cards ──────────────────────────── */
    .adv-jurisdiction-grid { gap: 10px; }
    .adv-analysis-grid { gap: 8px; }

    .adv-option-card,
    .adv-analysis-card {
        padding: 18px 8px !important;
        gap: 6px;
    }

    .adv-flag       { font-size: 28px !important; }
    .adv-analysis-icon { font-size: 22px !important; }
    .adv-option-name { font-size: 0.84rem !important; }
    .adv-option-sub  { font-size: 0.68rem !important; }

    /* Dark mode bottom nav */
    .dark .mobile-bottom-nav {
        background: #1e293b;
        border-top-color: #334155;
    }

    .dark .mob-nav-btn { color: #64748b; }
    .dark .mob-nav-btn.mob-nav-active { color: #38bdf8; }
}

/* ─ Small phones (≤ 480px) ──────────────────────────────────── */
@media (max-width: 480px) {

    #currentNotebookName {
        font-size: 0.82rem;
        max-width: 28vw;
    }

    .transform-card {
        min-height: 70px;
        padding: 10px 8px !important;
    }

    .transform-name { font-size: 0.74rem !important; }
    .transform-desc { font-size: 0.62rem !important; }

    .adv-option-card,
    .adv-analysis-card {
        padding: 14px 6px !important;
    }

    .adv-flag       { font-size: 24px !important; }
    .adv-option-name { font-size: 0.78rem !important; }

    .message-text { font-size: 0.88rem !important; }

    .modal-body { padding: 12px 14px 20px !important; }

    .note-view-content { padding: 10px !important; }
}

/* Auth UI */
.auth-container {
    display: flex;
    align-items: center;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-tertiary);
    padding: 4px 12px 4px 4px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.user-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hidden {
    display: none !important;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
}

/* Login Modal */
.login-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.2s ease-out;
}

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

.login-modal.active {
    display: flex;
}

.login-modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    min-width: 340px;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 0, 0, 0.1);
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, rgba(255, 255, 255, 0) 100%);
}

.login-modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.btn-close-login {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.btn-close-login:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.login-modal-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-login-provider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 20px;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 255, 255, 0.3) 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-login-provider::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.btn-login-provider:hover {
    background: var(--bg-hover);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15), 0 0 1px rgba(0, 0, 0, 0.1);
}

.btn-login-provider:hover::before {
    opacity: 1;
}

.btn-login-provider:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-login-provider svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

/* Share Modal */
.share-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.share-notebook-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.share-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.status-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.status-icon.public {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
}

.status-icon.private {
    background: rgba(156, 163, 175, 0.15);
    color: var(--text-muted);
}

.share-link-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.share-link-wrapper {
    display: flex;
    gap: var(--space-sm);
}

.share-link-input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.share-link-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn-copy-link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.share-actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
    margin-top: var(--space-md);
}


/* Public Badge */
.public-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    margin-left: var(--space-md);
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-green);
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius-full);
}

/* Readonly Mode */
.workspace-container.readonly-mode .transform-card {
    pointer-events: none;
    opacity: 0.5;
}

/* ===================== Quiz Interactive (Tailwind Blue) ===================== */
.quiz-container {
    padding: 4px 0;
    font-family: var(--font-sans);
}

/* ── Header / score bar ── */
.qz-header {
    background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
    border-radius: 12px;
    padding: 14px 18px;
    margin-bottom: 20px;
    color: #fff;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.qz-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.qz-total {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    opacity: 0.85;
    white-space: nowrap;
}

.qz-progress-wrap {
    flex: 1;
    height: 5px;
    background: rgba(255,255,255,0.3);
    border-radius: 999px;
    overflow: hidden;
}

.qz-progress-bar {
    height: 100%;
    background: #fff;
    border-radius: 999px;
    transition: width 0.35s ease;
}

.qz-scores {
    display: flex;
    align-items: center;
    gap: 8px;
}

.qz-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.qz-badge-correct {
    background: rgba(16,185,129,0.2);
    color: #d1fae5;
    border: 1px solid rgba(16,185,129,0.4);
}

.qz-badge-wrong {
    background: rgba(239,68,68,0.2);
    color: #fee2e2;
    border: 1px solid rgba(239,68,68,0.4);
}

.qz-reset-btn, .qz-regenerate-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.15);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

.qz-reset-btn { margin-left: auto; }

.qz-reset-btn:hover, .qz-regenerate-btn:hover { background: rgba(255,255,255,0.25); }

.qz-regenerate-btn:disabled { opacity: 0.6; cursor: default; }

/* ── Questions list ── */
.quiz-questions-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── Question card ── */
.quiz-question-card {
    background: #fff;
    border: 1.5px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px 18px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.quiz-question-card.qz-answered-correct {
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16,185,129,0.08);
}

.quiz-question-card.qz-answered-wrong {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239,68,68,0.08);
}

.qz-q-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.qz-q-num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #e0f2fe;
    color: #0369a1;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.qz-type-badge {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 2px 7px;
    border-radius: 999px;
}

.qz-mc {
    background: #e0f2fe;
    color: #0369a1;
}

.qz-tf {
    background: #fce7f3;
    color: #9d174d;
}

.qz-q-status {
    margin-left: auto;
    display: flex;
    align-items: center;
}

.quiz-q-text {
    font-size: 14.5px;
    font-weight: 500;
    color: #1e293b;
    margin-bottom: 14px;
    line-height: 1.65;
}

/* ── Options ── */
.quiz-options-grid {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.quiz-options-grid.tf {
    flex-direction: row;
    gap: 10px;
}

.quiz-opt-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
    padding: 9px 13px;
    border: 1.5px solid #e2e8f0;
    border-radius: 8px;
    background: #f8fafc;
    cursor: pointer;
    font-size: 13.5px;
    color: #334155;
    transition: border-color 0.15s, background 0.15s, transform 0.1s;
    line-height: 1.4;
    width: 100%;
    font-family: var(--font-sans);
}

.quiz-options-grid.tf .quiz-opt-btn { flex: 1; justify-content: center; }

.quiz-opt-btn:hover:not(:disabled) {
    border-color: #0369a1;
    background: #f0f9ff;
    transform: translateX(2px);
}

.quiz-opt-btn:disabled { cursor: default; }

.qz-opt-label {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #e2e8f0;
    color: #475569;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s;
}

.quiz-opt-btn:hover:not(:disabled) .qz-opt-label {
    background: #bae6fd;
    color: #0369a1;
}

.quiz-opt-btn.correct {
    border-color: #10b981;
    background: #ecfdf5;
    color: #065f46;
    font-weight: 600;
}

.quiz-opt-btn.correct .qz-opt-label {
    background: #10b981;
    color: #fff;
}

.quiz-opt-btn.wrong {
    border-color: #ef4444;
    background: #fef2f2;
    color: #991b1b;
}

.quiz-opt-btn.wrong .qz-opt-label {
    background: #ef4444;
    color: #fff;
}

.quiz-opt-btn.reveal {
    border-color: #10b981;
    border-style: dashed;
    background: #f0fdf4;
    color: #047857;
}

.quiz-opt-btn.reveal .qz-opt-label {
    background: #6ee7b7;
    color: #065f46;
}

/* ── Explanation ── */
.quiz-explanation {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: 12px;
    padding: 10px 14px;
    background: #f0f9ff;
    border-left: 3px solid #0369a1;
    border-radius: 0 8px 8px 0;
    font-size: 13px;
    color: #0369a1;
    line-height: 1.6;
}

.quiz-explanation svg { flex-shrink: 0; margin-top: 2px; }



/* ============================================
   EXPLICADOR PLAYER  (NotebookLM-style)
   ============================================ */
.podcast-player-wrapper {
    padding: 8px 0 16px;
}

/* Explicador card - clean white */
.exp-card {
    background: #fff;
    border-radius: 20px;
    border: 1px solid #e8eaed;
    max-width: 680px;
    margin: 0 auto;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    font-family: var(--font-sans);
}

/* Header */
.exp-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 22px 24px 14px;
}

.exp-title {
    font-size: 17px;
    font-weight: 700;
    color: #1a1a2e;
    line-height: 1.3;
    margin-bottom: 6px;
}

.exp-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #666;
}

.exp-meta-dot { color: #bbb; }

.exp-lang-sel {
    border: none;
    background: transparent;
    color: #555;
    font-size: 13px;
    cursor: pointer;
    outline: none;
    padding: 0;
}

.exp-turn-badge {
    font-size: 12px;
    font-weight: 600;
    color: #888;
    background: #f4f4f5;
    padding: 4px 10px;
    border-radius: 999px;
    white-space: nowrap;
    margin-top: 2px;
}

/* Waveform area */
.exp-wave-area {
    padding: 0 24px 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.exp-wave-canvas {
    width: 100%;
    height: 110px;
    display: block;
    border-radius: 8px;
}

.exp-speaker-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    min-height: 38px;
}

.exp-speaker-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-top: 4px;
    flex-shrink: 0;
    transition: background 0.3s;
}

.exp-dot-a { background: #07c160; }
.exp-dot-b { background: #3b5bdb; }

.exp-current-text {
    font-size: 13px;
    color: #555;
    line-height: 1.55;
    flex: 1;
}

/* Controls row */
.exp-controls-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 14px 24px 20px;
}

.exp-ctrl-circle {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 2px solid #1a1a2e;
    background: transparent;
    color: #1a1a2e;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.18s, transform 0.1s;
    flex-shrink: 0;
}

.exp-ctrl-circle:hover { background: #f0f0f0; transform: scale(1.05); }

.exp-play-circle {
    width: 62px;
    height: 62px;
    border-radius: 50%;
    border: none;
    background: #1a1a2e;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.18s, transform 0.1s;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(0,0,0,0.18);
}

.exp-play-circle:hover { background: #333; transform: scale(1.06); }
.exp-play-circle.exp-playing { background: #1a1a2e; }

.exp-join-pill {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 11px 22px;
    background: #3b5bdb;
    color: #fff;
    border: none;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.18s, transform 0.1s;
    white-space: nowrap;
}

.exp-join-pill:hover { background: #2f4cbf; transform: scale(1.03); }

.exp-join-pill.exp-join-cancel {
    background: #e8eaed;
    color: #333;
}
.exp-join-pill.exp-join-cancel:hover { background: #d0d3d8; }

/* Question area */
.exp-question-area {
    padding: 0 24px 16px;
    border-top: 1px solid #f0f0f0;
    padding-top: 16px;
}

.exp-question-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f8f9fa;
    border: 1px solid #e8eaed;
    border-radius: 14px;
    padding: 8px 12px;
}

.exp-q-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 14px;
    color: #1a1a2e;
    outline: none;
}

.exp-q-btn {
    background: transparent;
    border: none;
    color: #666;
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.15s;
    flex-shrink: 0;
}

.exp-q-btn:hover { background: #e8eaed; color: #333; }

.exp-q-send {
    background: #3b5bdb;
    color: #fff;
    border-radius: 8px;
    padding: 6px 14px;
    font-weight: 600;
}
.exp-q-send:hover { background: #2f4cbf; color: #fff; }

.exp-mic-active { color: #ef4444 !important; }

.exp-answer-wrap {
    margin-top: 12px;
    padding: 12px 14px;
    background: #f0f4ff;
    border-radius: 10px;
    border-left: 3px solid #3b5bdb;
}

.exp-answer-text {
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    margin: 0;
}

/* Feedback row */
.exp-feedback-row {
    display: flex;
    gap: 8px;
    padding: 12px 24px 18px;
    border-top: 1px solid #f0f0f0;
}

.exp-fb-btn {
    padding: 7px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 999px;
    background: #fff;
    color: #555;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.exp-fb-btn:hover { background: #f5f5f5; border-color: #bbb; }
.exp-fb-btn.exp-fb-active { background: #e8f7ef; border-color: #07c160; color: #07c160; }

/* Legacy explainer message */
.exp-legacy .exp-legacy-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    padding: 32px 24px 36px;
    color: #555;
}

.exp-legacy .exp-legacy-msg p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    max-width: 380px;
}

/* Print / PDF CSS */
@media print {
    /* Hide everything except center panel content */
    .app-header, .panel-left, .panel-right, .resizer,
    .tab-bar, .chat-input-area, .mobile-nav, .mobile-bottom-nav,
    .ppt-controls, .note-toolbar, .studio-section,
    .note-actions, .btn-print, .btn-download { display: none !important; }

    body { overflow: visible !important; background: white !important; }
    .app-container { overflow: visible !important; height: auto !important; }
    .main-grid {
        display: block !important;
        overflow: visible !important;
    }
    .panel-center {
        display: block !important;
        overflow: visible !important;
        height: auto !important;
    }

    /* Show note content */
    #noteContent {
        overflow: visible !important;
        max-height: none !important;
        padding: 20px !important;
    }

    /* PPT slides: show ALL slides for printing, one per page */
    .ppt-viewer-container {
        height: auto !important;
        aspect-ratio: unset !important;
        overflow: visible !important;
        background: transparent !important;
        box-shadow: none !important;
        border-radius: 0 !important;
    }
    .ppt-slides-wrapper {
        display: block !important;
        position: static !important;
        height: auto !important;
        overflow: visible !important;
    }
    .ppt-slide {
        display: block !important;
        position: static !important;
        width: 100% !important;
        height: auto !important;
        opacity: 1 !important;
        visibility: visible !important;
        page-break-after: always;
        margin-bottom: 0;
        background: white !important;
    }
    .ppt-slide img {
        max-width: 100% !important;
        height: auto !important;
        display: block;
    }
    .ppt-slide-counter { display: none !important; }
    .ppt-nav { display: none !important; }
    .btn-ppt-nav { display: none !important; }

    /* Infographic image */
    .infographic-image { max-width: 100%; height: auto; }

    /* Mermaid diagrams */
    .mermaid-diagram { page-break-inside: avoid; }

    /* General print cleanup */
    img { max-width: 100% !important; }
    a { text-decoration: none; color: inherit; }
}

/* ── Getting Started Onboarding Screen ──────────────────── */
.gs-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 24px 40px;
    gap: 28px;
    max-width: 620px;
    margin: 0 auto;
}

.gs-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.gs-brand-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.gs-brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: contain;
}

.gs-brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    background: linear-gradient(135deg, #0369a1 0%, #0ea5e9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.gs-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.gs-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
    max-width: 420px;
    line-height: 1.5;
}

/* Feature cards row */
.gs-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
}

.gs-feature-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.gs-feature-card:hover {
    border-color: #bae6fd;
    box-shadow: 0 2px 8px rgba(3,105,161,0.08);
}

.gs-feature-icon {
    width: 36px;
    height: 36px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.gs-feature-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.gs-feature-text strong {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.gs-feature-text span {
    font-size: 0.68rem;
    color: var(--text-secondary);
    line-height: 1.3;
}

/* Upload Card */
.gs-upload-card {
    width: 100%;
    border: 2px dashed #bae6fd;
    border-radius: 16px;
    background: #f8fbff;
    transition: border-color 0.2s, background 0.2s;
    overflow: hidden;
}

.gs-upload-card.gs-drop-over {
    border-color: #0369a1;
    background: #e0f2fe;
}

.gs-upload-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 28px 24px 20px;
    text-align: center;
}

.gs-upload-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 4px;
}

.gs-upload-hint {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.gs-upload-types {
    font-size: 0.72rem;
    color: #94a3b8;
    letter-spacing: 0.02em;
}

.gs-upload-btns {
    display: flex;
    gap: 8px;
    padding: 0 20px 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.gs-btn-upload, .gs-btn-url, .gs-btn-text {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.16s ease;
    border: 1.5px solid;
}

.gs-btn-upload {
    background: #0369a1;
    border-color: #0369a1;
    color: #fff;
    box-shadow: 0 2px 8px rgba(3,105,161,0.25);
}
.gs-btn-upload:hover {
    background: #025a8e;
    box-shadow: 0 4px 14px rgba(3,105,161,0.35);
    transform: translateY(-1px);
}

.gs-btn-url {
    background: #fff;
    border-color: #bae6fd;
    color: #0369a1;
}
.gs-btn-url:hover {
    background: #e0f2fe;
    border-color: #0369a1;
    transform: translateY(-1px);
}

.gs-btn-text {
    background: #fff;
    border-color: #e2e8f0;
    color: var(--text-secondary);
}
.gs-btn-text:hover {
    background: #f1f5f9;
    border-color: #94a3b8;
    transform: translateY(-1px);
}

/* Collapsed panel state */
.main-grid.right-collapsed .transform-info { display: none; }
.main-grid.right-collapsed .transform-card { justify-content: center; padding: 10px; }
.main-grid.right-collapsed .transform-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }

/* Feature icon colour tokens (onboarding modal) */
.gs-icon-sky    { background: #e0f2fe; }
.gs-icon-green  { background: #f0fdf4; }
.gs-icon-amber  { background: #fef3c7; }
.gs-icon-purple { background: #fdf2f8; }
.gs-icon-rose   { background: #fff1f2; }
.gs-icon-blue   { background: #f0f9ff; }

/* Onboarding modal overrides */
.modal-onboarding {
    max-width: 680px;
    width: 95vw;
    position: relative;
    padding: 0;
}
.onboarding-close {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 2;
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.15s;
}
.onboarding-close:hover { background: var(--bg-tertiary); }
.onboarding-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 36px 32px 28px;
}
.onboarding-skip {
    background: none;
    border: none;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    text-decoration: underline;
    opacity: 0.7;
    transition: opacity 0.15s;
}
.onboarding-skip:hover { opacity: 1; }

/* Quiz regenerate loading overlay */
.quiz-regen-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    min-height: 220px;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 0.88rem;
}
.quiz-regen-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid #e0f2fe;
    border-top-color: #0369a1;
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* end */

/* ── Onboarding feature grid ── */
.ob-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: 100%;
    margin: 14px 0 16px;
}

.ob-feat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-secondary);
    position: relative;
    transition: transform 0.15s, box-shadow 0.15s;
    min-height: 110px;
    justify-content: flex-start;
}

.ob-feat-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }

.ob-feat-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    flex-shrink: 0;
}

.ob-feat-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
}

.ob-feat-name {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
}

.ob-feat-desc {
    font-size: 0.62rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.3;
}

.ob-feat-new { border-color: #818cf8 !important; }

.ob-feat-badge {
    position: absolute;
    top: -6px;
    right: -4px;
    background: #4338ca;
    color: #fff;
    font-size: 0.55rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 2px 5px;
    border-radius: 6px;
}

/* ── Upload progress overlay ── */
#uploadProgressOverlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9996;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(3px);
    align-items: center;
    justify-content: center;
}

#uploadProgressOverlay.active { display: flex; }

.upl-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 28px 32px 24px;
    box-shadow: 0 24px 64px rgba(0,0,0,0.22);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    min-width: 280px;
    max-width: 88vw;
}

.upl-anim {
    position: relative;
    width: 60px;
    height: 60px;
}

.upl-doc {
    position: absolute;
    width: 40px;
    height: 50px;
    border-radius: 7px;
    border: 2px solid #bae6fd;
}

.upl-doc:nth-child(1) { background: #dbeafe; top: 8px; left: 12px; transform: rotate(7deg); }
.upl-doc:nth-child(2) { background: #e0f2fe; top: 4px; left: 8px; transform: rotate(3deg); }
.upl-doc:nth-child(3) { background: #f0f9ff; top: 0; left: 4px; transform: rotate(0deg); display: flex; align-items: center; justify-content: center; font-size: 19px; }

@keyframes upl-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
.upl-anim { animation: upl-float 1.5s ease-in-out infinite; }

.upl-title { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin: 0; }
.upl-file  { font-size: 0.78rem; font-weight: 600; color: #0ea5e9; max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upl-count { font-size: 0.75rem; color: var(--text-secondary); }

.upl-track {
    width: 100%;
    height: 5px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.upl-fill {
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, #38bdf8, #0ea5e9);
    transition: width 0.35s ease;
}

@keyframes upl-shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
.upl-fill.indeterminate {
    width: 40% !important;
    background: linear-gradient(90deg, #bae6fd, #0ea5e9, #bae6fd);
    background-size: 200% 100%;
    animation: upl-shimmer 1.4s linear infinite;
}

/* ── Advogado Modal ── */
.modal-advogado { max-width: 520px; }

.adv-jurisdiction-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 8px;
}

.adv-analysis-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 8px;
}

.adv-analysis-group { margin-top: 16px; }
.adv-modal-actions { margin-top: 16px; }

.adv-option-label {
    cursor: pointer;
    display: block;
}

.adv-option-label .adv-radio { display: none; }

.adv-option-card,
.adv-analysis-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    transition: border-color 0.15s, background 0.15s;
    text-align: center;
}

.adv-option-card:hover,
.adv-analysis-card:hover {
    border-color: #818cf8;
}

.adv-radio:checked + .adv-option-card,
.adv-radio:checked + .adv-analysis-card {
    border-color: #4338ca;
    background: #e0e7ff;
}

.dark .adv-radio:checked + .adv-option-card,
.dark .adv-radio:checked + .adv-analysis-card {
    border-color: #818cf8;
    background: #312e81;
}

.adv-flag { font-size: 22px; line-height: 1; }
.adv-analysis-icon { font-size: 18px; line-height: 1; }

.adv-option-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.adv-option-sub {
    font-size: 11px;
    color: var(--text-secondary);
}