/* ============== CSS Variables ============== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #dee2e6;
    --border-dark: #343a40;
    
    --primary: #4a90e2;
    --primary-dark: #3a7bc8;
    --primary-light: #6ba3e8;
    --emphasis: #b45309;

    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --error: #dc3545;
    --info: #17a2b8;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;

    /* Figure mode: enlarges all text for paper screenshots.
       Toggle via console: toggleFigureMode()
       --text-scale defaults to 1; figure mode sets it to 1.4 */
    --text-scale: 1;
    
    /* Schwartz Value Colors */
    --color-self-direction: #8B4513;
    --color-stimulation: #FF8C00;
    --color-hedonism: #FFD700;
    --color-achievement: #9ACD32;
    --color-power: #2E8B57;
    --color-security: #4682B4;
    --color-conformity: #6A5ACD;
    --color-tradition: #9370DB;
    --color-benevolence: #DB7093;
    --color-universalism: #CD5C5C;
}

/* Dark mode */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --border-color: #2a2a4a;
    --border-dark: #4a4a6a;
    
    --primary: #5a9cf2;
    --primary-dark: #4a8ce2;
    --primary-light: #6aacff;
    --emphasis: #f59e0b;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
}

/* Dark mode specific overrides */
[data-theme="dark"] .modal-content {
    background: var(--bg-primary);
    border-color: var(--border-dark);
}

[data-theme="dark"] .upload-dropzone {
    background: var(--bg-secondary);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .chart-container {
    background: var(--bg-secondary);
}

[data-theme="dark"] .admin-table th {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .error-message {
    background: rgba(220, 53, 69, 0.2);
    border-color: var(--danger);
}

[data-theme="dark"] .success-message {
    background: rgba(40, 167, 69, 0.2);
    border-color: var(--success);
}

[data-theme="dark"] code {
    background: var(--bg-tertiary);
}

/* Dark mode Plotly overrides */
[data-theme="dark"] .js-plotly-plot .plotly .modebar {
    background: transparent !important;
}

[data-theme="dark"] .js-plotly-plot .plotly .modebar-btn path {
    fill: var(--text-secondary) !important;
}

[data-theme="dark"] .admin-table {
    background: var(--bg-secondary);
}

[data-theme="dark"] .admin-table tr:hover td {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .stat-card {
    background: var(--bg-secondary);
}

/* Dark mode compare button fix */
[data-theme="dark"] .compare-btn {
    color: var(--text-primary);
}

[data-theme="dark"] .compare-btn:hover {
    color: var(--primary);
}

[data-theme="dark"] .compare-btn.active {
    color: white;
}

/* Additional status badges */
.status-badge.cooldown {
    background: #fff3cd;
    color: #856404;
}

.status-badge.pending {
    background: #e2e3e5;
    color: #383d41;
}

.status-badge.admin {
    background: #d4edda;
    color: #155724;
}

/* User/Study mode badges */
.status-badge.user-mode {
    background: #e3f2fd;
    color: #1565c0;
}

.status-badge.study-mode {
    background: #fce4ec;
    color: #c2185b;
}

[data-theme="dark"] .status-badge.user-mode {
    background: rgba(21, 101, 192, 0.2);
    color: #64b5f6;
}

[data-theme="dark"] .status-badge.study-mode {
    background: rgba(194, 24, 91, 0.2);
    color: #f48fb1;
}

/* Mode select dropdown in admin */
.mode-select {
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: calc(14px * var(--text-scale, 1));
    cursor: pointer;
}

.mode-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Invite code display in table */
.invite-code-small {
    display: block;
    font-size: calc(11px * var(--text-scale, 1));
    margin-top: 4px;
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.invite-status-cell {
    min-width: 120px;
}

/* Danger text button */
.text-btn.danger {
    color: var(--danger);
}

.text-btn.danger:hover {
    color: #a71d2a;
}

/* Dark mode status badges fix */
[data-theme="dark"] .status-badge.active {
    background: rgba(40, 167, 69, 0.2);
    color: #5fd068;
}

[data-theme="dark"] .status-badge.expired {
    background: rgba(220, 53, 69, 0.2);
    color: #ff6b6b;
}

[data-theme="dark"] .status-badge.used {
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

[data-theme="dark"] .status-badge.cooldown {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

[data-theme="dark"] .status-badge.pending {
    background: rgba(108, 117, 125, 0.2);
    color: #adb5bd;
}

[data-theme="dark"] .status-badge.admin {
    background: rgba(40, 167, 69, 0.15);
    color: #5fd068;
}

[data-theme="dark"] .invite-code-small {
    background: var(--bg-secondary);
}

/* Dark mode filter buttons */
[data-theme="dark"] .filter-btn {
    color: var(--text-primary);
}

[data-theme="dark"] .filter-btn:hover {
    color: var(--text-primary);
}

[data-theme="dark"] .filter-btn.active {
    color: white;
}

/* Theme toggle button */
.theme-toggle {
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: calc(16px * var(--text-scale, 1));
    transition: all 0.2s;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
}

.icon-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    font-size: calc(16px * var(--text-scale, 1));
    font-weight: 700;
    color: var(--text-secondary);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* ============== Brand Highlight ============== */
.brand-highlight {
    color: var(--primary);
    font-weight: inherit;
}

/* ============== Reset & Base ============== */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: var(--font-sans);
    font-size: calc(14px * var(--text-scale, 1));
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: 600;
}

p {
    margin: 0 0 1em 0;
}

input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
}

/* ============== Screens ============== */
.screen {
    height: 100%;
    width: 100%;
}

.screen.hidden {
    display: none;
}

/* ============== Auth Screen ============== */
.auth-header {
    position: absolute;
    top: 16px;
    right: 16px;
}

.auth-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 60px 20px;
}

.auth-container h1 {
    font-size: calc(28px * var(--text-scale, 1));
    text-align: center;
    margin-bottom: 8px;
}

.auth-container .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.auth-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: none;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

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

.tab-btn:hover {
    color: var(--primary-dark);
}

.tab-content {
    display: none;
}

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

/* ============== Form Elements ============== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-hint {
    font-size: calc(12px * var(--text-scale, 1));
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ============== Buttons ============== */
button {
    cursor: pointer;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.2s;
}

.primary-btn {
    width: 100%;
    padding: 14px 24px;
    background: var(--primary);
    color: white;
}

.primary-btn:hover:not(:disabled) {
    background: var(--primary-dark);
}

.primary-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.secondary-btn {
    padding: 10px 18px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.secondary-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-dark);
}

.danger-btn {
    padding: 10px 18px;
    background: var(--danger);
    color: white;
}

.danger-btn:hover {
    background: #c82333;
}

.text-btn {
    background: none;
    color: var(--primary);
    padding: 8px 12px;
}

.text-btn:hover {
    text-decoration: underline;
}

.icon-btn {
    padding: 8px;
    background: none;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: calc(18px * var(--text-scale, 1));
    line-height: 1;
}

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

.help-icon-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    padding: 0;
}

.help-icon-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* ============== Messages ============== */
.error-message {
    padding: 12px;
    background: #ffe6e6;
    border: 1px solid var(--danger);
    border-radius: var(--radius-md);
    color: var(--danger);
    margin-top: 16px;
    display: none;
}

.error-message:not(:empty) {
    display: block;
}

.success-message {
    padding: 12px;
    background: #e6ffe6;
    border: 1px solid var(--success);
    border-radius: var(--radius-md);
    color: var(--success);
    margin-top: 16px;
    display: none;
}

.success-message:not(:empty) {
    display: block;
}

/* ============== Header ============== */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: var(--bg-primary);
    border-bottom: 3px solid var(--border-dark);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-left h1 {
    font-size: calc(20px * var(--text-scale, 1));
}

.logo-link {
    text-decoration: none;
    color: inherit;
}

.logo-link:hover {
    opacity: 0.8;
}

.user-greeting {
    color: var(--text-secondary);
    font-size: calc(14px * var(--text-scale, 1));
}

.header-right {
    display: flex;
    gap: 12px;
    align-items: center;
}

.invite-icon {
    margin-right: 6px;
}

/* ============== Invite Indicator ============== */
.invite-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px 4px 4px;
    background: linear-gradient(135deg, var(--success) 0%, #20c997 100%);
    border-radius: 24px;
    animation: invitePulse 2s ease-in-out infinite;
}

@keyframes invitePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(40, 167, 69, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(40, 167, 69, 0); }
}

.invite-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s;
}

.invite-badge:hover {
    background: white;
    transform: scale(1.05);
}

.invite-badge .invite-icon {
    font-size: calc(16px * var(--text-scale, 1));
    margin-right: 2px;
}

.invite-badge .invite-count {
    font-weight: 700;
    color: var(--success);
    font-size: calc(14px * var(--text-scale, 1));
}

.invite-status {
    color: white;
    font-size: calc(12px * var(--text-scale, 1));
    font-weight: 600;
    white-space: nowrap;
}

/* Pending invite indicator */
.invite-pending {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    font-size: calc(13px * var(--text-scale, 1));
    color: var(--text-secondary);
}

.invite-pending .invite-icon {
    font-size: calc(14px * var(--text-scale, 1));
}

.invite-pending-text {
    white-space: nowrap;
}

#inviteCountdown {
    font-weight: 600;
    color: var(--primary);
}

/* ============== Modals ============== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-content.upload-modal {
    width: 500px;
}

.modal-content.conversation-modal {
    width: 900px;
    height: 80vh;
}

.modal-content.small-modal {
    width: 400px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h2 {
    font-size: calc(18px * var(--text-scale, 1));
}

.modal-close {
    background: none;
    border: none;
    font-size: calc(24px * var(--text-scale, 1));
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
}

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

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 2px solid var(--border-color);
}

.modal-footer .primary-btn {
    width: auto;
}

/* ============== Upload Dropzone ============== */
.upload-dropzone {
    border: 3px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.upload-dropzone:hover,
.upload-dropzone.drag-over {
    border-color: var(--primary);
    background: rgba(74, 144, 226, 0.05);
}

.dropzone-icon {
    font-size: calc(48px * var(--text-scale, 1));
    margin-bottom: 16px;
}

.dropzone-subtitle {
    color: var(--text-secondary);
    font-size: calc(13px * var(--text-scale, 1));
}

/* ============== Upload Preview ============== */
.upload-preview {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.platform-badge {
    padding: 4px 12px;
    background: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: calc(12px * var(--text-scale, 1));
    font-weight: 600;
    text-transform: uppercase;
}

.preview-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.preview-stats .stat {
    text-align: center;
}

.preview-stats .stat-value {
    display: block;
    font-size: calc(24px * var(--text-scale, 1));
    font-weight: 700;
    color: var(--primary);
}

.preview-stats .stat-label {
    font-size: calc(12px * var(--text-scale, 1));
    color: var(--text-secondary);
}

/* ============== Conversation Preview Button ============== */
.preview-conv-btn {
    width: 100%;
    margin-top: 12px;
    margin-bottom: 8px;
}

/* ============== Conversation Preview Modal ============== */
.modal-content.conversation-preview-modal {
    width: 700px;
    height: 85vh;
}

.conversation-preview-body {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.conversation-preview-info {
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 16px;
}

.preview-info-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 12px;
}

.preview-info-stat {
    text-align: center;
}

.preview-info-stat .stat-value {
    display: block;
    font-size: calc(20px * var(--text-scale, 1));
    font-weight: 700;
    color: var(--primary);
}

.preview-info-stat .stat-label {
    font-size: calc(12px * var(--text-scale, 1));
    color: var(--text-secondary);
}

.preview-info-hint {
    font-size: calc(13px * var(--text-scale, 1));
    color: var(--text-secondary);
    margin: 0;
}

.preview-info-hint strong {
    color: var(--success);
}

/* Navigation header for preview modal */
.preview-nav-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.preview-nav-header h2 {
    margin: 0;
}

.nav-arrow-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
    flex-shrink: 0;
}

.nav-arrow-btn svg {
    display: block;
}

.nav-arrow-btn:hover:not(:disabled) {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.nav-arrow-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    color: var(--text-secondary);
}

/* ============== Modal Header Actions ============== */
.modal-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ============== Conversation Filter Info ============== */
.conversation-filter-info {
    position: relative;
}

.info-tooltip-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: calc(14px * var(--text-scale, 1));
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
}

.info-tooltip-btn:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
    border-color: var(--primary);
}

.info-tooltip-btn span {
    line-height: 1;
}

.info-tooltip-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    font-size: calc(14px * var(--text-scale, 1));
    line-height: 1.5;
    width: 320px;
    text-align: left;
}

.info-tooltip-content p {
    margin: 0 0 10px 0;
}

.info-tooltip-content p:last-child {
    margin-bottom: 0;
}

.info-tooltip-content ul {
    margin: 10px 0 0 0;
    padding-left: 20px;
}

.info-tooltip-content li {
    margin-bottom: 6px;
}

.info-tooltip-content li:last-child {
    margin-bottom: 0;
}

.conversation-filter-info:hover .info-tooltip-content,
.info-tooltip-btn:focus + .info-tooltip-content {
    display: block;
}

/* ============== Invite Code Display ============== */
.invite-code-display {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin: 16px 0;
}

.invite-code-display code {
    flex: 1;
    font-family: var(--font-mono);
    font-size: calc(24px * var(--text-scale, 1));
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary);
}

/* ============== Utility Classes ============== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

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

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

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

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

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

/* ============== Comparison Area ============== */
.comparison-area .viz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding: 0 0.5rem;
}

.comparison-area .viz-header h2 {
    margin: 0;
}

.comparison-area .viz-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

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

.toggle-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
    accent-color: var(--primary);
}

.toggle-label input[type="checkbox"]:checked + span {
    color: var(--primary);
    font-weight: 500;
}

/* Floating Action Button */
.floating-action-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, #3a7bc8 100%);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: calc(16px * var(--text-scale, 1));
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    z-index: 1000;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.floating-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.floating-action-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* ============== Toggle Switch ============== */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: 0.3s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--success);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

.toggle-switch input:disabled + .toggle-slider {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============== Figure Mode ==============
   Enlarges all text for paper screenshots.
   Toggle: toggleFigureMode() in console.
   Only affects font-size, not layout/padding/element sizes.
   Plotly charts re-render automatically on toggle.
   ============== */