/* ============================================================
   Material Design You - BiliSrt AI Insights
   ============================================================ */

/* === Design Tokens === */
:root {
    /* Primary (Warm Amber) */
    --md-primary: #8B5E34;
    --md-on-primary: #FFFFFF;
    --md-primary-container: #FFDCBE;
    --md-on-primary-container: #2E1500;
    --md-primary-fixed: #FFDCBE;
    --md-primary-fixed-dim: #F5BA82;

    /* Secondary */
    --md-secondary: #735B4A;
    --md-on-secondary: #FFFFFF;
    --md-secondary-container: #FFDCBE;
    --md-on-secondary-container: #2A170B;

    /* Tertiary */
    --md-tertiary: #586339;
    --md-on-tertiary: #FFFFFF;
    --md-tertiary-container: #DCE8B4;
    --md-on-tertiary-container: #161F00;

    /* Error */
    --md-error: #BA1A1A;
    --md-error-container: #FFDAD6;

    /* Surface & Background */
    --md-surface: #FFF8F4;
    --md-on-surface: #201A15;
    --md-on-surface-variant: #52443A;
    --md-surface-variant: #F4DFD1;
    --md-surface-dim: #E4D7CE;
    --md-surface-bright: #FFF8F4;
    --md-surface-container-lowest: #FFFFFF;
    --md-surface-container-low: #FEF1E9;
    --md-surface-container: #F8EBE3;
    --md-surface-container-high: #F2E5DD;
    --md-surface-container-highest: #ECE0D7;

    /* Outline */
    --md-outline: #857468;
    --md-outline-variant: #D7C3B6;

    /* Inverse */
    --md-inverse-surface: #362F28;
    --md-inverse-on-surface: #FBEDE4;

    /* Elevation */
    --md-elevation-1: 0 1px 3px 1px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.10);
    --md-elevation-2: 0 2px 6px 2px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.10);
    --md-elevation-3: 0 4px 8px 3px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.10);

    /* Motion */
    --md-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --md-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
    --md-motion-easing-decelerate: cubic-bezier(0, 0, 0, 1);
    --md-motion-duration-short: 150ms;
    --md-motion-duration-medium: 220ms;
    --md-motion-duration-long: 400ms;

    /* Shape */
    --md-shape-xs: 4px;
    --md-shape-sm: 8px;
    --md-shape-md: 12px;
    --md-shape-lg: 16px;
    --md-shape-xl: 28px;
    --md-shape-full: 9999px;
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Google Sans Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--md-surface);
    color: var(--md-on-surface);
    line-height: 1.6;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

body::-webkit-scrollbar {
    display: none;
}

/* === App Shell === */
#app {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

.view {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transform: translateX(100%);
    transition: opacity var(--md-motion-duration-medium) var(--md-motion-easing-standard),
                transform var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.view::-webkit-scrollbar {
    display: none;
}

/* Home view 不自己滚动，由内部 scroll-area 滚动 */
#home-view {
    z-index: 1;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    overflow: hidden;
}

.home-scroll-area {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    min-height: 0;
}

.home-scroll-area::-webkit-scrollbar {
    display: none;
}

/* 详情层覆盖主页，支持右入右出 */
.overlay-view {
    z-index: 20;
    opacity: 1;
    transform: translateX(100%);
    pointer-events: none;
    background: var(--md-surface);
    transition: transform var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    will-change: transform;
}

.overlay-view.active {
    transform: translateX(0);
    pointer-events: auto;
}

.overlay-view.exit-right {
    transform: translateX(100%);
    pointer-events: none;
    /* 退出用加速曲线：立即开始移动，消除感知延迟 */
    transition: transform 180ms cubic-bezier(0.3, 0, 0.8, 0.15);
}

.view.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
}

/* 进入动画（forward push） */
.view.enter-forward {
    transition: opacity var(--md-motion-duration-medium) var(--md-motion-easing-standard),
                transform var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

/* 返回时无动画 */
.view.no-transition {
    transition: none !important;
}

/* === Top App Bar === */
.top-bar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 4px;
    background: var(--md-surface);
    min-height: 56px;
    transition: background var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.top-bar.scrolled {
    background: var(--md-surface-container);
    box-shadow: var(--md-elevation-1);
}

.top-bar .icon-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: var(--md-shape-full);
    color: var(--md-on-surface);
    cursor: pointer;
    font-size: 24px;
    transition: background var(--md-motion-duration-short);
    flex-shrink: 0;
}

.top-bar .icon-btn:hover {
    background: var(--md-on-surface-variant);
    background: rgba(0,0,0,0.06);
}

.top-bar .icon-btn:active {
    background: rgba(0,0,0,0.10);
}

.top-bar-title {
    flex: 1;
    font-size: 18px;
    font-weight: 500;
    color: var(--md-on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 4px;
}

/* === HOME VIEW === */

/* Hero Section */
.home-hero {
    padding: 8px 20px 4px;
}

.hero-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--md-on-surface);
    line-height: 1.3;
}

.hero-title .emoji {
    margin-left: 6px;
}

/* Topic List */
.topic-list {
    padding: 12px 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.topic-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 4px;
    border-bottom: 1px solid var(--md-outline-variant);
    cursor: pointer;
    transition: background var(--md-motion-duration-short);
    border-radius: var(--md-shape-sm);
}

.topic-item:last-child {
    border-bottom: none;
}

.topic-item:hover {
    background: var(--md-surface-container-low);
}

.topic-item:active {
    background: var(--md-surface-container);
}

.topic-item .topic-text {
    flex: 1;
    font-size: 15.5px;
    font-weight: 400;
    color: var(--md-on-surface);
    line-height: 1.5;
}

.topic-item .topic-arrow {
    font-size: 18px;
    color: var(--md-outline);
    flex-shrink: 0;
}

.topic-item .topic-tag {
    padding: 2px 10px;
    border-radius: var(--md-shape-full);
    font-size: 11px;
    font-weight: 500;
    flex-shrink: 0;
    letter-spacing: 0.3px;
}

.tag-contrast { background: #FFE0E0; color: #8C1D18; }
.tag-eval { background: #D6E8FF; color: #1A4A7A; }
.tag-persona { background: #E0F4D8; color: #1A5C1A; }
.tag-qa { background: #FFF3D6; color: #7A5A00; }

/* Ask Bar */
.ask-bar {
    margin: 4px 20px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--md-surface-container);
    border-radius: var(--md-shape-lg);
    cursor: pointer;
    transition: background var(--md-motion-duration-short);
}

.ask-bar:hover {
    background: var(--md-surface-container-high);
}

.ask-bar .material-symbols-rounded {
    font-size: 20px;
    color: var(--md-primary);
}

.ask-bar span {
    font-size: 14px;
    color: var(--md-on-surface-variant);
}

/* Category Wheel */
.category-section {
    flex-shrink: 0;
    background: var(--md-surface);
    padding: 12px 0 0;
    border-top: 1px solid var(--md-outline-variant);
    padding-bottom: max(0px, env(safe-area-inset-bottom));
}

.category-wheel {
    display: flex;
    gap: 8px;
    padding: 0 20px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-snap-type: x mandatory;
}

.category-wheel::-webkit-scrollbar { display: none; }

.category-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--md-shape-full);
    border: 1.5px solid var(--md-outline-variant);
    background: transparent;
    color: var(--md-on-surface-variant);
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    scroll-snap-align: start;
    transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
    flex-shrink: 0;
}

.category-chip:hover {
    background: var(--md-surface-container-low);
}

.category-chip.active {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    border-color: var(--md-primary-container);
}

.category-chip .material-symbols-rounded {
    font-size: 18px;
}

/* Bottom Bar */
.bottom-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    min-height: 52px;
}

.page-dots {
    display: flex;
    gap: 6px;
    justify-content: center;
}

.page-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--md-shape-full);
    background: var(--md-outline-variant);
    transition: all var(--md-motion-duration-short);
}

.page-dot.active {
    width: 18px;
    background: var(--md-primary);
}

.timeline-btn {
    position: static;
    width: 48px;
    height: 48px;
    border-radius: var(--md-shape-full);
    border: none;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--md-elevation-2);
    transition: all var(--md-motion-duration-short);
}

.timeline-btn-floating {
    position: absolute;
    right: max(12px, env(safe-area-inset-right));
    bottom: calc(76px + env(safe-area-inset-bottom));
    z-index: 15;
}

.timeline-btn:hover {
    box-shadow: var(--md-elevation-3);
}

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

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 64px 32px;
    text-align: center;
    color: var(--md-on-surface-variant);
}

.empty-state .material-symbols-rounded {
    font-size: 56px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 15px;
    line-height: 1.6;
}

/* Skeleton Loading */
.skeleton {
    position: relative;
    overflow: hidden;
    background: var(--md-surface-container);
    border-radius: var(--md-shape-sm);
}

.skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.skeleton-line {
    height: 16px;
    margin-bottom: 12px;
    border-radius: var(--md-shape-sm);
}

.skeleton-line:nth-child(2) { width: 80%; }
.skeleton-line:nth-child(3) { width: 60%; }
.skeleton-line:nth-child(4) { width: 90%; }
.skeleton-line:nth-child(5) { width: 40%; }

/* === DETAIL VIEW === */

/* AI Badge */
.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--md-primary-container), var(--md-secondary-container));
    border-radius: var(--md-shape-full);
    font-size: 12px;
    font-weight: 500;
    color: var(--md-on-primary-container);
    margin: 16px 20px 8px;
}

.ai-badge .material-symbols-rounded {
    font-size: 16px;
}

/* Detail Header */
.detail-header {
    padding: 0 20px 16px;
}

.detail-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--md-on-surface);
    line-height: 1.35;
}

/* Status Indicator */
.status-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

.status-spinner {
    width: 18px;
    height: 18px;
    border: 2.5px solid var(--md-outline-variant);
    border-top-color: var(--md-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Sources */
.sources-section {
    padding: 0 20px;
    margin-bottom: 12px;
}

.sources-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sources-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.source-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: var(--md-surface-container);
    border-radius: var(--md-shape-full);
    font-size: 12px;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    transition: background var(--md-motion-duration-short);
}

.source-chip:hover {
    background: var(--md-surface-container-high);
}

.source-chip .material-symbols-rounded {
    font-size: 14px;
}

/* AI Content */
.ai-content-wrapper {
    padding: 0 20px 20px;
    overflow: hidden;
    transition: max-height var(--md-motion-duration-long) var(--md-motion-easing-standard);
}

.ai-content {
    font-size: 15px;
    line-height: 1.75;
    color: var(--md-on-surface);
}

.ai-content h1 { font-size: 20px; font-weight: 700; margin: 20px 0 10px; }
.ai-content h2 { font-size: 18px; font-weight: 700; margin: 18px 0 8px; color: var(--md-on-surface); }
.ai-content h3 { font-size: 16px; font-weight: 600; margin: 14px 0 6px; color: var(--md-on-surface); }

.ai-content p { margin-bottom: 12px; }

.ai-content ul, .ai-content ol {
    padding-left: 20px;
    margin-bottom: 12px;
}

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

.ai-content strong {
    font-weight: 600;
    color: var(--md-on-surface);
}

/* Quote Reference - 无 transition，避免 streaming 中 innerHTML 重建导致闪烁 */
.quote-ref {
    display: inline;
    background: linear-gradient(to bottom, transparent 60%, var(--md-primary-fixed) 60%);
    color: var(--md-primary);
    font-weight: 500;
    cursor: pointer;
    padding: 0 2px;
    border-radius: 2px;
    text-decoration: none;
}

.quote-ref:hover {
    background: var(--md-primary-fixed);
}

.quote-ref::before {
    content: '\201C';
    color: var(--md-primary);
    font-weight: 700;
}

.quote-ref::after {
    content: '\201D';
    color: var(--md-primary);
    font-weight: 700;
}

/* Collapse/Expand */
.content-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px;
    margin: 0 20px;
    border: none;
    background: transparent;
    color: var(--md-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--md-shape-sm);
    transition: background var(--md-motion-duration-short);
}

.content-toggle:hover {
    background: rgba(139, 94, 52, 0.08);
}

.content-toggle .material-symbols-rounded {
    font-size: 20px;
    transition: transform var(--md-motion-duration-short);
}

.content-toggle.expanded .material-symbols-rounded {
    transform: rotate(180deg);
}

/* Follow-up Questions */
.followup-section {
    padding: 16px 20px 32px;
}

.followup-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    margin-bottom: 10px;
}

.followup-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.followup-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-shape-lg);
    font-size: 14px;
    color: var(--md-on-surface);
    cursor: pointer;
    transition: all var(--md-motion-duration-short);
    text-align: left;
}

.followup-chip:hover {
    background: var(--md-surface-container-high);
    border-color: var(--md-primary);
}

.followup-chip:active {
    transform: scale(0.98);
}

.followup-chip .material-symbols-rounded {
    font-size: 20px;
    color: var(--md-primary);
    flex-shrink: 0;
}

/* === EXPANDED VIEW === */

.expanded-content {
    padding: 16px 20px 40px;
}

.expanded-ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--md-primary-container), #FFE4CC);
    border-radius: var(--md-shape-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--md-on-primary-container);
    margin-bottom: 16px;
}

.expanded-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--md-on-surface);
    margin-bottom: 20px;
    line-height: 1.35;
}

.expanded-body {
    font-size: 15.5px;
    line-height: 1.8;
    color: var(--md-on-surface);
}

.expanded-body h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 24px 0 10px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--md-primary-fixed);
    color: var(--md-on-surface);
}

.expanded-body h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 18px 0 8px;
}

.expanded-body p { margin-bottom: 14px; }

.expanded-body ul, .expanded-body ol {
    padding-left: 20px;
    margin-bottom: 14px;
}

.expanded-body li { margin-bottom: 8px; }

.expanded-body .quote-ref {
    display: inline;
    padding: 2px 4px;
    background: var(--md-primary-fixed);
    color: var(--md-primary);
    border-radius: var(--md-shape-xs);
    font-size: 14.5px;
    line-height: 1.7;
}

/* Expanded Quote List */
.expanded-quote-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.expanded-quote-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 12px;
    border-radius: var(--md-shape-md);
    cursor: pointer;
    transition: background var(--md-motion-duration-short);
    border-bottom: 1px solid var(--md-outline-variant);
}

.expanded-quote-item:last-child {
    border-bottom: none;
}

.expanded-quote-item:hover {
    background: var(--md-surface-container-low);
}

.expanded-quote-item:active {
    background: var(--md-surface-container);
}

.expanded-quote-number {
    width: 28px;
    height: 28px;
    border-radius: var(--md-shape-full);
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
}

.expanded-quote-body {
    flex: 1;
    min-width: 0;
}

.expanded-quote-text {
    font-size: 14.5px;
    font-weight: 500;
    color: var(--md-on-surface);
    line-height: 1.5;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.expanded-quote-meta {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

/* Expanded Sources Footer */
.expanded-sources {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--md-outline-variant);
}

.expanded-sources h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--md-on-surface-variant);
    margin-bottom: 12px;
}

.source-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--md-surface-container-low);
    border-radius: var(--md-shape-md);
    margin-bottom: 8px;
    text-decoration: none;
    color: var(--md-on-surface);
    transition: background var(--md-motion-duration-short);
}

.source-card:hover {
    background: var(--md-surface-container);
}

.source-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--md-shape-sm);
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.source-info { flex: 1; min-width: 0; }

.source-info .title {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.source-info .up {
    font-size: 12px;
    color: var(--md-on-surface-variant);
    margin-top: 2px;
}

/* === QUOTE OVERLAY === */

.overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--md-motion-duration-medium) var(--md-motion-easing-standard);
}

.overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.overlay-scrim {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.overlay-sheet {
    position: relative;
    z-index: 1;
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
    max-height: 70vh;
    background: var(--md-surface-container-low);
    border-radius: var(--md-shape-xl) var(--md-shape-xl) 0 0;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    padding-bottom: max(20px, env(safe-area-inset-bottom));
}

.overlay.active .overlay-sheet {
    transform: translateY(0);
}

.sheet-handle {
    display: flex;
    justify-content: center;
    padding: 12px 0 8px;
}

.sheet-handle-bar {
    width: 32px;
    height: 4px;
    background: var(--md-outline-variant);
    border-radius: var(--md-shape-full);
}

.quote-detail {
    padding: 8px 24px 24px;
}

.quote-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.quote-text {
    font-size: 18px;
    font-weight: 500;
    line-height: 1.6;
    color: var(--md-on-surface);
    padding: 20px;
    background: var(--md-primary-fixed);
    border-radius: var(--md-shape-lg);
    border-left: 4px solid var(--md-primary);
    margin-bottom: 20px;
}

.quote-text::before {
    content: '\201C';
    font-size: 36px;
    font-weight: 700;
    color: var(--md-primary);
    display: block;
    line-height: 1;
    margin-bottom: 4px;
}

.quote-source-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.quote-source-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--md-on-surface-variant);
}

.quote-source-row .material-symbols-rounded {
    font-size: 18px;
    color: var(--md-outline);
}

.quote-open-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    border-radius: var(--md-shape-xl);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--md-motion-duration-short);
}

.quote-open-btn:hover {
    box-shadow: var(--md-elevation-2);
}

.quote-open-btn:active {
    transform: scale(0.98);
}

/* === Cursor Blink === */
.cursor-blink {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--md-primary);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* === Error State === */
.error-card {
    margin: 20px;
    padding: 20px;
    background: var(--md-error-container);
    border-radius: var(--md-shape-lg);
    color: #601410;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.error-card .material-symbols-rounded {
    font-size: 24px;
    flex-shrink: 0;
}

.error-card p {
    font-size: 14px;
    line-height: 1.5;
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in-up {
    animation: fadeInUp var(--md-motion-duration-medium) var(--md-motion-easing-decelerate) forwards;
}

.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }

/* Ripple effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: radial-gradient(circle, var(--md-primary) 10%, transparent 10.01%) no-repeat 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform 0.5s, opacity 0.8s;
}

.ripple:active::after {
    transform: scale(0, 0);
    opacity: 0.15;
    transition: 0s;
}

/* === Responsive === */

/* Tablet and Desktop */
@media (min-width: 600px) {
    #app {
        max-width: 640px;
        border-left: 1px solid var(--md-outline-variant);
        border-right: 1px solid var(--md-outline-variant);
    }

    body {
        background: var(--md-surface-dim);
    }

    .hero-title {
        font-size: 30px;
    }

    .topic-item .topic-text {
        font-size: 16px;
    }

    .ai-content, .expanded-body {
        font-size: 16px;
    }
}

@media (min-width: 1024px) {
    #app {
        max-width: 700px;
        box-shadow: var(--md-elevation-3);
        border: none;
        border-radius: var(--md-shape-lg) var(--md-shape-lg) 0 0;
        margin-top: 16px;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --md-primary: #F5BA82;
        --md-on-primary: #4A2800;
        --md-primary-container: #6A4320;
        --md-on-primary-container: #FFDCBE;
        --md-primary-fixed: #FFDCBE;
        --md-primary-fixed-dim: #F5BA82;

        --md-secondary: #E3C0A3;
        --md-on-secondary: #412D1B;
        --md-secondary-container: #5A4333;
        --md-on-secondary-container: #FFDCBE;

        --md-surface: #18120D;
        --md-on-surface: #ECE0D7;
        --md-on-surface-variant: #D7C3B6;
        --md-surface-variant: #52443A;
        --md-surface-dim: #18120D;
        --md-surface-bright: #3F372F;
        --md-surface-container-lowest: #120D08;
        --md-surface-container-low: #201A15;
        --md-surface-container: #251F19;
        --md-surface-container-high: #2F2923;
        --md-surface-container-highest: #3A342D;

        --md-outline: #A08D82;
        --md-outline-variant: #52443A;

        --md-error: #FFB4AB;
        --md-error-container: #93000A;
    }

    .tag-contrast { background: #5C2828; color: #FFB4AB; }
    .tag-eval { background: #1A3A5C; color: #A8CDFF; }
    .tag-persona { background: #1A4A1A; color: #A8DAA0; }
    .tag-qa { background: #5C4A00; color: #FFE088; }
}

/* Safe area support */
@supports (padding: max(0px)) {
    .bottom-bar {
        padding-bottom: max(12px, env(safe-area-inset-bottom));
    }
}