/* ===================================================
   PDF to PDF/A Converter — style.css
   Premium dark-mode UI, mobile-first responsive
=================================================== */

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

:root {
    --bg: #0f0f13;
    --bg2: #16161e;
    --bg3: #1e1e2a;
    --border: rgba(255, 255, 255, 0.08);
    --border2: rgba(255, 255, 255, 0.14);
    --text: #e8e8f0;
    --text2: #9999bb;
    --text3: #6666aa;
    --accent: #6366f1;
    --accent2: #8b5cf6;
    --gold: #f59e0b;
    --gold2: #d97706;
    --green: #10b981;
    --red: #ef4444;
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.6);
    --transition: 0.22s ease;
    --grad: linear-gradient(135deg, var(--accent), var(--accent2));
    --grad-gold: linear-gradient(135deg, var(--gold), var(--gold2));
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ---- App Wrapper ---- */
.app-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ---- Header ---- */
.main-header {
    padding: 32px 0 24px;
    text-align: center;
}

.brand-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 10px;
}

.brand-icon svg {
    width: 44px;
    height: 44px;
    filter: drop-shadow(0 2px 12px rgba(99, 102, 241, 0.4));
}

.brand-text h1 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 800;
    background: var(--grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.badge-free {
    display: inline-block;
    background: var(--grad-gold);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 9px;
    border-radius: 20px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    vertical-align: middle;
    margin-left: 4px;
}

.header-subtitle {
    color: var(--text2);
    font-size: 0.9rem;
    max-width: 520px;
    margin: 0 auto;
}

/* ---- Stage System ---- */
.stage.active {
    display: block;
}

.stage.hidden {
    display: none;
}

/* ---- Upload Card ---- */
.upload-card {
    background: var(--bg2);
    border: 2px dashed var(--border2);
    border-radius: var(--radius);
    padding: 52px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.upload-card:hover,
.upload-card.drag-over {
    border-color: var(--accent);
    background: var(--bg3);
    transform: translateY(-2px);
}

.upload-icon-wrap svg {
    width: 72px;
    height: 72px;
    margin-bottom: 16px;
}

.upload-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.upload-sub {
    color: var(--text2);
    margin-bottom: 10px;
}

.link-style {
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.upload-note {
    font-size: 0.78rem;
    color: var(--text3);
    margin-bottom: 20px;
}

.btn-upload {
    background: var(--grad);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35);
}

.btn-upload:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.5);
}

/* ---- Loading Card ---- */
.loading-card {
    background: var(--bg2);
    border-radius: var(--radius);
    padding: 52px 24px;
    text-align: center;
}

.spinner {
    width: 52px;
    height: 52px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 0.8s linear infinite;
}

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

.processing-text {
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 16px;
    font-weight: 500;
}

.progress-bar-wrap {
    background: var(--bg3);
    border-radius: 999px;
    height: 8px;
    overflow: hidden;
    margin: 0 auto 10px;
    max-width: 360px;
}

.progress-bar {
    background: var(--grad);
    height: 100%;
    border-radius: 999px;
    transition: width 0.3s ease;
}

.progress-detail {
    font-size: 0.8rem;
    color: var(--text3);
}

/* ---- File Info Bar ---- */
.file-info-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    margin-bottom: 14px;
    gap: 10px;
    flex-wrap: wrap;
}

.file-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.file-icon {
    font-size: 1.1rem;
}

.file-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sep {
    color: var(--text3);
}

.meta-chip {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text2);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
}

/* ---- Settings Panel ---- */
.settings-panel {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 14px;
}

.panel-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--text);
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 20px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group.full-width {
    grid-column: 1 / -1;
}

.setting-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-value {
    font-weight: 700;
    color: var(--accent);
    margin-left: 6px;
}

/* Mode buttons */
.mode-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mode-btn {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text2);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-width: 110px;
}

.mode-btn .mode-sub {
    font-size: 0.7rem;
    color: var(--text3);
    font-weight: 400;
}

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

.mode-btn.active {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.mode-btn.active .mode-sub {
    color: rgba(255, 255, 255, 0.7);
}

.standard-desc {
    font-size: 0.82rem;
    color: var(--text2);
    margin-top: 4px;
    background: var(--bg3);
    border-left: 3px solid var(--accent);
    padding: 10px 14px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Select */
.select-input {
    background: var(--bg3);
    border: 1px solid var(--border2);
    color: var(--text);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition);
    width: 100%;
}

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

.select-input option,
.select-input optgroup {
    background: var(--bg3);
    color: var(--text);
}

/* Toggle buttons (orientation) */
.toggle-row {
    display: flex;
    gap: 8px;
}

.toggle-btn {
    flex: 1;
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text2);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--transition);
}

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

.toggle-btn.active {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.orient-icon {
    font-size: 1rem;
}

/* Page range radios */
.page-range-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    color: var(--text2);
    cursor: pointer;
}

.radio-label input[type="radio"] {
    accent-color: var(--accent);
    transform: scale(1.1);
}

/* Text input */
.text-input {
    background: var(--bg3);
    border: 1px solid var(--border2);
    color: var(--text);
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    width: 100%;
    outline: none;
    transition: border-color var(--transition);
    font-family: inherit;
}

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

.text-input::placeholder {
    color: var(--text3);
}

.text-input.hidden {
    display: none;
}

/* Collapsible metadata panel */
.collapsible-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    width: 100%;
    cursor: pointer;
    color: var(--text2);
    font-size: 0.88rem;
    font-weight: 600;
    transition: all var(--transition);
}

.collapsible-header:hover {
    border-color: var(--accent);
    color: var(--text);
}

.optional-tag {
    font-weight: 400;
    color: var(--text3);
    font-size: 0.8rem;
}

.chevron {
    transition: transform var(--transition);
    font-size: 0.75rem;
}

.chevron.open {
    transform: rotate(180deg);
}

.collapsible-body {
    display: block;
}

.collapsible-body.hidden {
    display: none;
}

.meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 12px;
}

.meta-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.meta-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Action row */
.action-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--grad);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35);
    flex: 1;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.5);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 11px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    flex: 1;
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 7px 14px;
    font-size: 0.82rem;
    cursor: pointer;
    transition: all var(--transition);
}

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

.btn-ghost.small {
    padding: 4px 10px;
    font-size: 0.78rem;
}

/* ---- Preview Section ---- */
.preview-section {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 14px;
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.preview-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.preview-page {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    position: relative;
}

.preview-page:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}

.preview-page canvas {
    width: 100%;
    display: block;
}

.preview-page-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.65);
    color: var(--text2);
    font-size: 0.72rem;
    text-align: center;
    padding: 4px;
    backdrop-filter: blur(4px);
}

.preview-footer {
    margin-top: 16px;
    display: flex;
    gap: 12px;
}

/* ---- Success Card ---- */
.success-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 52px 24px;
    text-align: center;
}

.success-icon {
    font-size: 3.5rem;
    margin-bottom: 12px;
}

.success-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 8px;
}

.success-sub {
    color: var(--text2);
    margin-bottom: 18px;
}

.compliance-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg3);
    border: 1px solid var(--gold);
    border-radius: 999px;
    padding: 6px 16px;
    margin-bottom: 24px;
}

.cb-label {
    font-size: 0.78rem;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cb-value {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--gold);
}

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

/* ---- Comparison Table ---- */
.comparison-table-wrap {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    min-width: 420px;
}

.comparison-table th {
    background: var(--bg3);
    color: var(--text2);
    font-weight: 600;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 2px solid var(--border2);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.comparison-table th:first-child {
    border-radius: var(--radius-sm) 0 0 0;
}

.comparison-table th:last-child {
    border-radius: 0 var(--radius-sm) 0 0;
}

.comparison-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text2);
}

.comparison-table td:first-child {
    font-weight: 600;
    color: var(--text);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:hover td {
    background: var(--bg3);
}

/* ---- SEO Section ---- */
.seo-section {
    padding: 48px 0;
    border-top: 1px solid var(--border);
    margin-top: 32px;
}

.seo-inner {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.seo-article {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.seo-article h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 14px;
}

.seo-article p {
    color: var(--text2);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 10px;
}

.seo-article p:last-child {
    margin-bottom: 0;
}

.seo-article strong {
    color: var(--text);
}

.seo-article code {
    background: var(--bg3);
    border: 1px solid var(--border2);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 0.82rem;
    color: var(--accent);
}

/* Feature list */
.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.feature-list li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.feature-list .feature-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-list div strong {
    color: var(--text);
    font-size: 0.92rem;
}

.feature-list div p {
    color: var(--text2);
    font-size: 0.84rem;
    margin-top: 2px;
    margin-bottom: 0;
}

/* Steps list */
.steps-list {
    list-style: none;
    counter-reset: steps;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.steps-list li {
    counter-increment: steps;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-size: 0.92rem;
    color: var(--text2);
}

.steps-list li::before {
    content: counter(steps);
    background: var(--grad);
    color: #fff;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px;
}

.steps-list strong {
    color: var(--text);
}

/* Plain list */
.plain-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.plain-list li {
    font-size: 0.9rem;
    color: var(--text2);
}

.plain-list strong {
    color: var(--text);
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faq-item {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.faq-item summary {
    padding: 14px 16px;
    cursor: pointer;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '＋';
    color: var(--accent);
    font-size: 1rem;
    transition: transform var(--transition);
    flex-shrink: 0;
}

.faq-item[open] summary::after {
    content: '－';
}

.faq-item[open] {
    border-color: var(--accent);
}

.faq-item p {
    padding: 0 16px 14px;
    font-size: 0.87rem;
    color: var(--text2);
    line-height: 1.6;
}

/* Related tools */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
}

.related-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 10px;
    text-decoration: none;
    color: var(--text2);
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    transition: all var(--transition);
}

.related-card:hover {
    border-color: var(--accent);
    color: var(--text);
    transform: translateY(-2px);
}

.r-icon {
    font-size: 1.4rem;
}

/* ---- Footer ---- */
.site-footer {
    text-align: center;
    padding: 24px 0 32px;
    border-top: 1px solid var(--border);
    color: var(--text3);
    font-size: 0.82rem;
}

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

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

.footer-note {
    margin-top: 4px;
}

/* ---- Toast ---- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(60px);
    background: var(--bg2);
    border: 1px solid var(--border2);
    color: var(--text);
    padding: 12px 24px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 500;
    box-shadow: var(--shadow);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    pointer-events: none;
    max-width: 90vw;
    text-align: center;
    white-space: nowrap;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.error {
    border-color: var(--red);
    color: var(--red);
}

.toast.success {
    border-color: var(--green);
    color: var(--green);
}

/* ---- Lightbox ---- */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.lightbox.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.lightbox-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 90vw;
}

.lightbox-content img {
    max-height: 80vh;
    max-width: 100%;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
}

.lightbox-caption {
    color: var(--text2);
    font-size: 0.82rem;
    margin-top: 10px;
    text-align: center;
}

.lightbox-close {
    position: fixed;
    top: 16px;
    right: 16px;
    background: var(--bg3);
    border: 1px solid var(--border2);
    color: var(--text);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.lightbox-close:hover {
    background: var(--red);
    border-color: var(--red);
}

.lightbox-nav {
    background: var(--bg3);
    border: 1px solid var(--border2);
    color: var(--text);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.6rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    flex-shrink: 0;
}

.lightbox-nav:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.lightbox-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }

    .meta-grid {
        grid-template-columns: 1fr;
    }

    .mode-btns {
        gap: 6px;
    }

    .mode-btn {
        min-width: 90px;
        padding: 8px 10px;
        font-size: 0.8rem;
    }

    .action-row {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        flex: none;
        width: 100%;
    }

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

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

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

    .settings-panel {
        padding: 16px;
    }

    .seo-article {
        padding: 20px 16px;
    }

    .comparison-table {
        font-size: 0.78rem;
    }

    .upload-card {
        padding: 36px 16px;
    }

    .lightbox-nav {
        width: 36px;
        height: 36px;
        font-size: 1.3rem;
    }

    .file-name {
        max-width: 130px;
    }
}

@media (max-width: 400px) {
    .brand-area {
        gap: 10px;
    }

    .brand-text h1 {
        font-size: 1.3rem;
    }

    .mode-btn {
        min-width: 80px;
    }
}