/* ============================================
   深度视频转换器 - Video to Depth Converter
   ============================================ */

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

:root {
    /* Colors - Dark theme */
    --bg-base: #0a0a0f;
    --bg-surface: #131320;
    --bg-elevated: #1a1a2e;
    --bg-hover: #222238;
    --border: #2a2a40;
    --border-light: #353550;

    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-tertiary: #6b6b85;

    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.35);
    --accent-soft: rgba(99, 102, 241, 0.12);

    --success: #10b981;
    --success-soft: rgba(16, 185, 129, 0.12);
    --warning: #f59e0b;
    --warning-soft: rgba(245, 158, 11, 0.12);
    --error: #ef4444;
    --error-soft: rgba(239, 68, 68, 0.12);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 32px var(--accent-glow);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background gradient effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(129, 140, 248, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== Layout ===== */
.app {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.header {
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 48px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-img {
    display: block;
    height: 56px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.header-badges {
    display: flex;
    gap: 10px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* ===== Sections ===== */
.section {
    display: none;
    animation: fadeInUp 0.4s ease;
}

.section.active {
    display: block;
}

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

.section-header {
    text-align: center;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ===== Upload Section ===== */
.upload-hero {
    text-align: center;
    margin-bottom: 40px;
}

.hero-title {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    line-height: 1.3;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

.upload-area {
    position: relative;
    border: 2px dashed var(--border-light);
    border-radius: var(--radius-xl);
    padding: 64px 32px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-surface);
    overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent);
    background: var(--bg-elevated);
}

.upload-area.dragover {
    transform: scale(1.01);
}

.upload-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.upload-area:hover .upload-glow,
.upload-area.dragover .upload-glow {
    opacity: 1;
}

.upload-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--accent-light);
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.upload-area h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.upload-hint {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 16px;
}

.upload-hint .link {
    color: var(--accent-light);
    text-decoration: underline;
    cursor: pointer;
}

.upload-formats {
    font-size: 13px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

/* Features grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 48px;
}

.feature-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--border-light);
    background: var(--bg-elevated);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

.feature-card h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== Settings Section ===== */
.settings-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 24px;
}

.video-preview-card,
.settings-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
}

.card-header h3 {
    font-size: 15px;
    font-weight: 600;
}

.video-wrapper {
    padding: 16px;
}

.video-wrapper video {
    width: 100%;
    border-radius: var(--radius-md);
    background: #000;
    max-height: 400px;
    object-fit: contain;
}

.video-info {
    padding: 0 24px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.video-info-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.video-info-item .label {
    font-size: 11px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.video-info-item .value {
    font-size: 14px;
    font-weight: 600;
}

/* Settings card */
.settings-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
}

.setting-desc {
    font-size: 12px;
    color: var(--text-tertiary);
    font-weight: 400;
}

.setting-value {
    font-size: 13px;
    color: var(--accent-light);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    min-width: 30px;
    text-align: right;
}

/* Custom select */
.custom-select {
    position: relative;
}

.custom-select select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: var(--transition);
}

.custom-select select:hover {
    border-color: var(--border-light);
}

.custom-select select:focus {
    outline: none;
    border-color: var(--accent);
}

.custom-select::after {
    content: '';
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 7px;
    height: 7px;
    border-right: 2px solid var(--text-tertiary);
    border-bottom: 2px solid var(--text-tertiary);
    pointer-events: none;
}

/* Toggle group */
.toggle-group {
    display: flex;
    gap: 8px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px;
}

.toggle-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

.toggle-btn.active {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 8px var(--accent-glow);
}

/* Slider */
.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-elevated);
    border-radius: 3px;
    border: 1px solid var(--border);
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-light);
    border: 2px solid var(--bg-base);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px var(--accent-glow);
    transition: var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-light);
    border: 2px solid var(--bg-base);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px var(--accent-glow);
}

/* Settings footer */
.settings-footer {
    padding: 18px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--accent-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-large {
    padding: 14px 28px;
    font-size: 15px;
}

/* ===== Processing Section ===== */
.processing-container {
    max-width: 800px;
    margin: 0 auto;
}

.processing-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 32px;
}

.preview-frame-card {
    flex: 1;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    max-width: 340px;
}

.preview-label {
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border);
}

.preview-frame-card canvas {
    width: 100%;
    display: block;
    aspect-ratio: 16/9;
    background: #000;
}

.preview-arrow {
    color: var(--accent-light);
    flex-shrink: 0;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; transform: translateX(0); }
    50% { opacity: 1; transform: translateX(4px); }
}

/* Model download panel */
.model-download-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    margin-bottom: 16px;
    animation: panelFadeIn 0.4s ease;
}

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

.model-download-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
}

.model-download-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    animation: iconPulse 2s ease-in-out infinite;
    box-shadow: 0 0 24px rgba(99, 102, 241, 0.3);
}

@keyframes iconPulse {
    0%, 100% { box-shadow: 0 0 24px rgba(99, 102, 241, 0.3); }
    50% { box-shadow: 0 0 36px rgba(99, 102, 241, 0.55); }
}

.model-download-icon.done {
    background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    animation: none;
    box-shadow: 0 0 24px rgba(16, 185, 129, 0.3);
}

.model-download-titles {
    flex: 1;
}

.model-download-titles h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 4px 0;
    color: var(--text-primary);
}

.model-download-titles p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin: 0;
    line-height: 1.5;
}

.model-dl-overall {
    margin-bottom: 16px;
}

.model-dl-bar-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
}

.model-dl-bar {
    flex: 1;
    height: 10px;
    background: var(--bg-elevated);
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid var(--border);
    position: relative;
}

.model-dl-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-light) 100%);
    border-radius: 5px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.model-dl-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.25) 50%, transparent 100%);
    animation: shimmer 1.5s linear infinite;
}

.model-dl-fill.done::after {
    display: none;
}

.model-dl-percent {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-light);
    min-width: 50px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.model-dl-percent.done {
    color: #34d399;
}

.model-dl-speed {
    font-size: 12px;
    color: var(--text-tertiary);
    min-height: 16px;
}

.model-dl-files {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.model-dl-file {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
}

.model-dl-file-name {
    flex: 1;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
}

.model-dl-file-bar {
    width: 80px;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    overflow: hidden;
    flex-shrink: 0;
}

.model-dl-file-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.model-dl-file-fill.done {
    background: #10b981;
    width: 100% !important;
}

.model-dl-file-status {
    flex-shrink: 0;
    width: 44px;
    text-align: right;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
}

.model-dl-file-status.done {
    color: #34d399;
}

.model-dl-file-spinner {
    flex-shrink: 0;
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.model-dl-file-check {
    flex-shrink: 0;
    width: 14px;
    height: 14px;
    color: #34d399;
}

/* Model local storage (save to disk) */
.model-dl-local {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
}

.model-dl-local-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.model-dl-local-row .btn {
    flex-shrink: 0;
    padding: 8px 14px;
    font-size: 12px;
}

.model-dl-local-status {
    flex: 1;
    min-width: 220px;
    font-size: 12px;
    color: var(--text-tertiary);
    line-height: 1.5;
}

.model-dl-local-status.ok {
    color: #34d399;
}

.model-dl-local-status.warn {
    color: #f59e0b;
}

/* Progress */
.progress-section {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.progress-bar-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.progress-bar {
    flex: 1;
    height: 12px;
    background: var(--bg-elevated);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border);
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-light) 100%);
    border-radius: 6px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.2) 50%, transparent 100%);
    animation: shimmer 1.5s linear infinite;
}

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

.progress-percent {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-light);
    min-width: 60px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 11px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 16px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* Processing log */
.processing-log {
    margin-top: 16px;
    max-height: 120px;
    overflow-y: auto;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
    font-size: 12px;
    color: var(--text-tertiary);
}

.processing-log .log-entry {
    padding: 2px 0;
}

.processing-log .log-time {
    color: var(--text-tertiary);
    opacity: 0.6;
}

.processing-log .log-info {
    color: var(--text-secondary);
}

.processing-log .log-success {
    color: var(--success);
}

.processing-log .log-error {
    color: var(--error);
}

/* ===== Error Detail ===== */
.error-detail {
    margin-top: 24px;
    padding: 20px;
    background: var(--error-soft, rgba(244, 63, 94, 0.08));
    border: 1px solid var(--error);
    border-radius: 12px;
    text-align: left;
}

.error-detail .error-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--error);
    margin-bottom: 12px;
}

.error-detail .error-message {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    white-space: pre-wrap;
    margin-bottom: 16px;
}

.error-detail .error-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ===== Result Section ===== */
.result-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.result-header {
    margin-bottom: 32px;
}

.result-success {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-soft);
    border: 1px solid var(--success);
    border-radius: 50%;
    color: var(--success);
}

.result-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.result-header p {
    color: var(--text-secondary);
}

.result-video-wrap {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
}

.result-video-wrap video {
    width: 100%;
    display: block;
    max-height: 500px;
    background: #000;
}

.result-stats {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
}

.result-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.result-stat .label {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-stat .value {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-light);
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    margin-top: auto;
    padding: 32px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer p {
    font-size: 13px;
    color: var(--text-tertiary);
}

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

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

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    font-size: 14px;
    max-width: 360px;
    animation: toastIn 0.3s ease;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--error); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--accent); }

.toast.removing {
    animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .settings-layout {
        grid-template-columns: 1fr;
    }

    .progress-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .app {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 26px;
    }

    .upload-area {
        padding: 40px 20px;
    }

    .processing-preview {
        flex-direction: column;
    }

    .preview-arrow {
        transform: rotate(90deg);
    }

    .preview-arrow svg {
        animation: pulseDown 2s ease infinite;
    }

    @keyframes pulseDown {
        0%, 100% { opacity: 0.4; transform: translateY(0); }
        50% { opacity: 1; transform: translateY(4px); }
    }

    .header-badges {
        display: none;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .btn {
        width: 100%;
    }
}

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

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

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

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