*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a73e8;
    --primary-hover: #1557b0;
    --primary-light: #e8f0fe;
    --bg: #f5f6f8;
    --surface: #ffffff;
    --surface-alt: #f0f1f4;
    --border: #e8eaed;
    --border-focus: #1a73e8;
    --text: #202124;
    --text-secondary: #5f6368;
    --text-muted: #9aa0a6;
    --success: #0d904f;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-pill: 100px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --primary: #4da6ff;
    --primary-hover: #7abdff;
    --primary-light: #1a2a3e;
    --bg: #111318;
    --surface: #1a1d24;
    --surface-alt: #22262e;
    --border: #2d3139;
    --border-focus: #4da6ff;
    --text: #e8eaed;
    --text-secondary: #9aa0a6;
    --text-muted: #6b7280;
    --success: #34d399;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
}

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

body {
    font-family: "Google Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* ===== Header ===== */
header {
    padding: 32px 0 0;
    text-align: center;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text);
}

.logo::after {
    content: "";
    display: inline-block;
    width: 7px;
    height: 7px;
    background: var(--primary);
    border-radius: 50%;
    margin-left: 1px;
    vertical-align: super;
}

.tagline {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 6px;
    font-weight: 400;
}

/* ===== Tool Search ===== */
.tool-search-wrap {
    margin-top: 28px;
    margin-bottom: 4px;
}

.tool-search-box {
    position: relative;
    max-width: 520px;
    margin: 0 auto;
}

.tool-search-box svg {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    z-index: 1;
}

.tool-search-box > input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    font-size: 0.9375rem;
    background: var(--surface);
    color: var(--text);
    outline: none;
    transition: all var(--transition);
    font-family: inherit;
}

.tool-search-box > input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
}

.tool-search-box > input::placeholder {
    color: var(--text-muted);
}

.tool-search-results {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    max-height: 360px;
    overflow-y: auto;
    z-index: 100;
}

.tool-search-results.show { display: block; }

.tool-search-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    cursor: pointer;
    transition: background var(--transition);
    border-bottom: 1px solid var(--border);
}

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

.tool-search-item:hover { background: var(--surface-alt); }

.tool-search-item .ts-icon {
    font-size: 1.3rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-alt);
    border-radius: 10px;
    flex-shrink: 0;
}

.tool-search-item .ts-info { flex: 1; }

.tool-search-item .ts-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.tool-search-item .ts-cat {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.tool-search-empty {
    padding: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

[data-theme="dark"] .tool-search-box > input { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .tool-search-results { background: var(--surface); border-color: var(--border); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }

/* ===== Category Tabs ===== */
.cat-tabs {
    display: inline-flex;
    gap: 0;
    margin: 28px auto 0;
    background: var(--surface-alt);
    border-radius: var(--radius-pill);
    padding: 4px;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}

.cat-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 22px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.cat-tab:hover {
    color: var(--text);
    background: rgba(0,0,0,0.04);
}

.cat-tab.active {
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
}

.cat-tab svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.cat-tab.active svg {
    opacity: 1;
    color: var(--primary);
}

/* ===== Category / Sub Panels ===== */
.cat-panel { display: none; }
.cat-panel.active { display: block; animation: fadeIn 0.3s ease; }

.sub-tabs {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 24px;
    padding: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    background: transparent;
    flex-wrap: wrap;
}

.sub-tabs::-webkit-scrollbar { display: none; }

.sub-tabs-inner {
    display: contents;
}

.sub-tab {
    padding: 7px 16px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.sub-tab.collapsed {
    display: none;
}

.sub-tabs.expanded .sub-tab.collapsed {
    display: inline-flex;
    align-items: center;
}

.sub-tabs-more {
    padding: 7px 14px;
    border: 1px dashed var(--border);
    background: transparent;
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.sub-tabs-more:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}

.sub-tabs.expanded .sub-tabs-more {
    border-style: solid;
}

[data-theme="dark"] .sub-tabs-more { border-color: var(--border); color: var(--primary); }
[data-theme="dark"] .sub-tabs-more:hover { background: var(--primary-light); }

.sub-tab:hover {
    color: var(--text);
    border-color: #dadce0;
    background: var(--surface-alt);
}

.sub-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    font-weight: 500;
}

/* ===== Panels ===== */
.panel {
    display: none;
    margin-top: 24px;
}

.panel.active {
    display: block;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Drop Zone ===== */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 72px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--surface-alt);
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--primary-light);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary);
    border-style: solid;
}

.drop-zone:hover::before,
.drop-zone.dragover::before {
    opacity: 0.5;
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    position: relative;
    z-index: 1;
}

.drop-zone-content svg {
    opacity: 0.45;
    transition: all 0.3s ease;
}

.drop-zone:hover .drop-zone-content svg {
    opacity: 0.7;
    transform: translateY(-2px);
}

.drop-zone-content p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.browse-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1.5px solid transparent;
    transition: border-color var(--transition);
}

.drop-zone:hover .browse-link {
    border-bottom-color: var(--primary);
}

.hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.file-input { display: none; }

/* ===== Tool Options ===== */
.tool-options { margin-top: 24px; }

/* ===== Preview Area ===== */
.preview-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.preview-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.preview-box.full-width { grid-column: 1 / -1; }

.preview-box h3 {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 14px;
}

.preview-img-wrap {
    background: repeating-conic-gradient(#f1f3f4 0% 25%, transparent 0% 50%) 50% / 14px 14px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    max-height: 420px;
}

.preview-img-wrap img,
.preview-img-wrap canvas {
    max-width: 100%;
    max-height: 400px;
    display: block;
    object-fit: contain;
}

.preview-img-wrap canvas {
    width: 100%;
    height: auto;
}

.file-info {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 10px;
}

/* ===== Controls ===== */
.controls {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.control-row:last-of-type { margin-bottom: 0; }

.control-row label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 110px;
    flex-shrink: 0;
}

.control-row input[type="number"],
.control-row input[type="text"],
.control-row select {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text);
    background: var(--surface);
    outline: none;
    transition: all var(--transition);
    font-family: inherit;
}

.control-row input:focus,
.control-row select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.15);
}

.control-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    transition: background var(--transition);
}

.control-row input[type="range"]:hover {
    background: #dadce0;
}

.control-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(26, 115, 232, 0.3);
    transition: transform var(--transition), box-shadow var(--transition);
}

.control-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.4);
}

.control-row input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.control-row input[type="color"] {
    width: 44px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 3px;
    background: var(--surface);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    min-width: auto !important;
    font-size: 0.8125rem;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
    background: var(--surface);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.btn:hover {
    background: var(--surface-alt);
    border-color: #dadce0;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.75rem;
    border-radius: var(--radius-pill);
}

.btn-primary {
    width: 100%;
    margin-top: 24px;
    padding: 13px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: inherit;
    letter-spacing: 0.01em;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.35);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-secondary {
    width: 100%;
    margin-top: 10px;
    padding: 11px 24px;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.btn-secondary:hover {
    background: var(--surface-alt);
    border-color: #dadce0;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-row {
    display: flex;
    gap: 10px;
    margin-top: 24px;
}

.btn-row .btn { flex: 1; }
.btn-row .btn-primary { margin-top: 0; }

/* ===== Crop ===== */
.crop-container { margin-bottom: 16px; }

.crop-area {
    position: relative;
    display: inline-block;
    max-width: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.crop-image {
    display: block;
    max-width: 100%;
    max-height: 500px;
    user-select: none;
    -webkit-user-drag: none;
}

.crop-selection {
    position: absolute;
    border: 2px solid var(--primary);
    background: rgba(26, 115, 232, 0.06);
    cursor: move;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.4);
}

.crop-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--surface);
    border: 2px solid var(--primary);
    border-radius: 50%;
}

.crop-handle.nw { top: -5px; left: -5px; cursor: nw-resize; }
.crop-handle.ne { top: -5px; right: -5px; cursor: ne-resize; }
.crop-handle.sw { bottom: -5px; left: -5px; cursor: sw-resize; }
.crop-handle.se { bottom: -5px; right: -5px; cursor: se-resize; }
.crop-handle.n { top: -5px; left: 50%; transform: translateX(-50%); cursor: n-resize; }
.crop-handle.s { bottom: -5px; left: 50%; transform: translateX(-50%); cursor: s-resize; }
.crop-handle.w { top: 50%; left: -5px; transform: translateY(-50%); cursor: w-resize; }
.crop-handle.e { top: 50%; right: -5px; transform: translateY(-50%); cursor: e-resize; }

.crop-info-row {
    flex-wrap: wrap;
    gap: 10px;
}

.crop-dimensions {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

.crop-presets {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

.crop-presets .btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== Compress Stats ===== */
.compress-stats {
    background: var(--surface-alt);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-bottom: 4px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: none;
}

.compress-stats.visible { display: block; }

.compress-stats .stat-row {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.compress-stats .stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.compress-stats .stat-value {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.compress-stats .stat-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.compress-stats .stat-saved { color: var(--success); }

/* ===== Filter Grid ===== */
.filter-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.filter-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 10px 6px;
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--surface-alt);
    cursor: pointer;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.filter-item:hover {
    background: var(--surface);
    border-color: var(--border);
}

.filter-item.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.filter-thumb {
    width: 56px;
    height: 56px;
    border-radius: 6px;
    overflow: hidden;
    background: repeating-conic-gradient(#f1f3f4 0% 25%, transparent 0% 50%) 50% / 8px 8px;
}

.filter-thumb canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* ===== Base64 ===== */
.b64-output {
    margin-top: 6px;
}

.b64-output label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.b64-output textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
    font-size: 0.75rem;
    color: var(--text);
    background: var(--surface-alt);
    resize: vertical;
    outline: none;
    transition: all var(--transition);
    line-height: 1.5;
}

.b64-output textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.15);
}

/* ===== EXIF Table ===== */
.exif-table-wrap {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.exif-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.exif-table th,
.exif-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.exif-table tr:last-child th,
.exif-table tr:last-child td {
    border-bottom: none;
}

.exif-table th {
    background: var(--surface-alt);
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
    width: 150px;
}

.exif-table td {
    color: var(--text);
    word-break: break-all;
}

/* ===== Audio ===== */
.audio-info {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.audio-info .info-item {
    display: flex;
    flex-direction: column;
}

.audio-info .info-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.audio-info .info-value {
    font-weight: 600;
    color: var(--text);
    margin-top: 2px;
}

.waveform-container {
    position: relative;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
    height: 140px;
    overflow: hidden;
}

.waveform-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.waveform-overlay {
    position: absolute;
    top: 16px;
    left: 16px;
    right: 16px;
    bottom: 16px;
    pointer-events: none;
}

.trim-region {
    position: absolute;
    top: 0;
    bottom: 0;
    background: rgba(26, 115, 232, 0.12);
    border-left: 2px solid var(--primary);
    border-right: 2px solid var(--primary);
    pointer-events: none;
}

.trim-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 10px;
    background: var(--primary);
    cursor: ew-resize;
    pointer-events: all;
    border-radius: 3px;
    opacity: 0.9;
}

.trim-handle::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 18px;
    background: rgba(255,255,255,0.7);
    border-radius: 1px;
}

.trim-handle.start { left: 0; }
.trim-handle.end { right: 0; }

.time-input {
    font-family: "SF Mono", "Consolas", monospace;
    letter-spacing: 0.04em;
    font-size: 0.8125rem !important;
}

.audio-preview-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.speed-presets {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.speed-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== Progress Bar ===== */
.progress-bar {
    background: var(--surface-alt);
    border-radius: var(--radius-sm);
    padding: 18px;
    margin: 16px 0;
}

.progress-fill {
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    display: block;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 10px;
}

/* ===== PDF ===== */
.pdf-info {
    background: var(--surface-alt);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.pdf-preview {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 16px;
}

.pdf-page {
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.pdf-page canvas {
    display: block;
    width: 100%;
    height: auto;
}

/* ===== Ad Container ===== */
#ad-container {
    max-width: 960px;
    margin: 48px auto 0;
    padding: 0 24px;
    min-height: 90px;
}

.ad-slot {
    text-align: center;
    margin: 16px 0;
    min-height: 90px;
    overflow: hidden;
}

/* ===== Articles Grid ===== */
.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.article-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    cursor: pointer;
    transition: all var(--transition);
}

.article-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(26,115,232,0.1);
    transform: translateY(-2px);
}

.article-item h3 {
    font-size: 1.05rem;
    color: var(--text);
    margin-bottom: 6px;
    font-weight: 600;
}

.article-item .article-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 8px;
}

.article-item .article-excerpt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.page-btn {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
}

.page-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.article-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    margin-top: 8px;
    flex-wrap: wrap;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.article-categories {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    flex: 1;
}

.article-cat-btn {
    padding: 8px 20px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--surface-alt);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
}

.article-cat-btn:hover {
    background: var(--border);
    color: var(--text);
}

.article-cat-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(26,115,232,0.25);
}

.article-search {
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    overflow: hidden;
    transition: all var(--transition);
}

.article-search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
}

.search-input {
    padding: 10px 16px;
    border: none;
    background: transparent;
    font-size: 0.85rem;
    outline: none;
    color: var(--text);
    width: 180px;
    transition: width var(--transition);
    font-family: inherit;
}

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

.search-input:focus {
    width: 220px;
}

.search-btn {
    padding: 10px 16px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-muted);
    transition: all var(--transition);
    display: flex;
    align-items: center;
}

.search-btn:hover {
    color: var(--primary);
    background: var(--surface-alt);
}

[data-theme="dark"] .article-cat-btn { background: var(--surface-alt); color: var(--text-secondary); }
[data-theme="dark"] .article-cat-btn:hover { background: var(--border); color: var(--text); }
[data-theme="dark"] .article-search { background: var(--surface); border-color: var(--border); }

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 60px 0;
    font-size: 0.95rem;
}

.back-to-list {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.back-to-list:hover { text-decoration: underline; }

.article-detail-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.article-detail-card h2 {
    font-size: 1.4rem;
    color: var(--text);
    margin-bottom: 8px;
}

.article-detail-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.article-detail-content {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

.article-detail-content p { margin-bottom: 12px; }
.article-detail-content img {
    max-width: 100%;
    width: auto;
    height: auto;
    border-radius: var(--radius-sm);
    margin: 12px 0;
    display: block;
}
.article-detail-content table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.article-detail-content table td,.article-detail-content table th { border: 1px solid var(--border); padding: 8px 12px; }
.article-detail-content blockquote { border-left: 3px solid var(--primary); padding: 8px 16px; margin: 12px 0; background: var(--surface-alt); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.article-detail-content pre { background: #1e293b; color: #e2e8f0; padding: 16px; border-radius: var(--radius-sm); overflow-x: auto; margin: 12px 0; font-size: 0.85rem; }
.article-detail-content h1,.article-detail-content h2,.article-detail-content h3 { color: var(--text); margin: 20px 0 8px; }
.article-detail-content ul,.article-detail-content ol { padding-left: 24px; margin-bottom: 12px; }
.article-detail-content a { color: var(--primary); }
.article-detail-content h1,.article-detail-content h2,.article-detail-content h3 { color: var(--text); margin: 16px 0 8px; }

/* ===== Footer ===== */
footer {
    margin-top: auto;
    padding: 32px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.01em;
    background: var(--surface);
    border-top: 1px solid var(--border);
}

footer a {
    color: var(--text-muted);
    text-decoration: none;
}

footer a:hover {
    color: var(--text-secondary);
    text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .container { padding: 0 16px; }

    header { padding: 24px 0 0; }
    .logo { font-size: 1.25rem; }

    .cat-tabs {
        margin-top: 20px;
        padding: 3px;
    }

    .cat-tab {
        padding: 9px 14px;
        font-size: 0.8125rem;
        gap: 5px;
    }

    .cat-tab svg { width: 16px; height: 16px; }

    .sub-tabs {
        margin-top: 16px;
        gap: 5px;
        padding-bottom: 4px;
    }

    .sub-tab { padding: 6px 12px; font-size: 0.75rem; }

    .panel { margin-top: 16px; }

    .drop-zone { padding: 48px 16px; }
    .drop-zone-content svg { width: 36px; height: 36px; }
    .drop-zone-content p { font-size: 0.875rem; }

    .preview-area {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .controls { padding: 18px; }

    .control-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        margin-bottom: 16px;
    }

    .control-row label { min-width: auto; }

    .crop-info-row { flex-direction: column; }
    .crop-presets { margin-left: 0; flex-wrap: wrap; }
    .crop-image { max-height: 300px; }

    .preview-img-wrap {
        min-height: 140px;
        max-height: 260px;
    }

    .preview-img-wrap img { max-height: 240px; }

    .filter-grid { grid-template-columns: repeat(3, 1fr); }

    .waveform-container { height: 110px; }

    .audio-info { gap: 14px; padding: 16px; }

    .btn-group { width: 100%; }
    .btn-group .btn { flex: 1; }
}

@media (max-width: 480px) {
    .cat-tab {
        padding: 8px 10px;
        font-size: 0.75rem;
    }

    .cat-tab svg { display: none; }

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

    .speed-presets { gap: 4px; }
    .speed-btn { padding: 5px 10px; font-size: 0.6875rem; }

    .compress-stats .stat-row { gap: 20px; }
    .compress-stats .stat-value { font-size: 1.125rem; }
}

/* ===== Header Auth ===== */
.header-user-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-auth {
    display: flex;
    gap: 8px;
}

.auth-btn {
    padding: 7px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.auth-btn:hover { border-color: #dadce0; color: var(--text); }

.auth-btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.auth-btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.header-user {
    position: relative;
}

.header-user::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 12px;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    transition: background var(--transition);
}

.user-menu-trigger:hover { background: var(--surface-alt); }

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

.user-avatar-placeholder {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.user-nickname {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== VIP Badge ===== */
.vip-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
}

.vip-badge.member {
    background: linear-gradient(135deg, #f5a623, #f7c948);
    color: #fff;
}

.vip-badge.non-member {
    background: #e8eaed;
    color: #9aa0a6;
}

.vip-badge img {
    width: 16px;
    height: 16px;
    margin-right: 4px;
}

.vip-badge:hover {
    opacity: 0.85;
    transform: scale(1.05);
}

[data-theme="dark"] .vip-badge.non-member {
    background: #2d3139;
    color: #6b7280;
}

/* ===== Dashboard Modal ===== */
.dashboard-modal {
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
}

.dashboard-modal .site-popup-close {
    position: sticky;
    top: 8px;
    float: right;
    margin-right: 8px;
    margin-top: 8px;
    z-index: 10;
}

/* ===== VIP Popup ===== */
.vip-popup {
    max-width: 420px;
    max-height: 80vh;
    overflow-y: auto;
}

.vip-popup .vip-popup-header {
    padding: 20px 24px 0;
    text-align: center;
}

.vip-popup .vip-popup-header h3 {
    font-size: 1.1rem;
    color: var(--text);
    padding: 0;
}

.vip-popup .vip-popup-body {
    padding: 16px 24px 24px;
}

.vip-popup .vip-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.vip-popup .vip-info-row:last-of-type {
    border-bottom: none;
}

.vip-popup .vip-info-label {
    color: var(--text-secondary);
}

.vip-popup .vip-info-value {
    color: var(--text);
    font-weight: 600;
}

.vip-popup .vip-info-value.active {
    color: #16a34a;
}

.vip-popup .vip-info-value.inactive {
    color: #9aa0a6;
}

.vip-popup .vip-activate-area {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.vip-popup .vip-activate-area label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.vip-popup .vip-activate-area input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition);
    background: var(--surface);
    color: var(--text);
    box-sizing: border-box;
}

.vip-popup .vip-activate-area input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(26,115,232,0.15);
}

.vip-popup {
    overflow: hidden;
}
.vip-popup.member {
    background: var(--surface);
    color: var(--text);
}
.vip-popup.non-member {
    background: var(--surface);
    color: var(--text);
}
.vip-popup.non-member .vip-popup-header {
    background: linear-gradient(135deg, var(--primary), #4da6ff);
    padding: 24px 24px 20px;
    margin: 0;
}
.vip-popup.non-member .vip-popup-header h3 {
    color: #fff;
}
.vip-popup.member .vip-popup-header {
    background: linear-gradient(135deg, #f59e0b, #f7c948);
    padding: 24px 24px 20px;
    margin: 0;
}
.vip-popup.member .vip-popup-header h3 {
    color: #fff;
}
.vip-popup h3, .vip-popup label, .vip-popup .vip-info-label {
    color: var(--text-secondary);
}
.vip-popup .vip-info-value {
    color: var(--text);
}
.vip-popup input {
    background: var(--surface-alt);
    border-color: var(--border);
    color: var(--text);
}
.vip-popup input::placeholder { color: var(--text-muted); }
.vip-popup .btn-primary {
    background: var(--primary);
    color: #fff;
}
.vip-popup .btn-primary:hover {
    background: var(--primary-hover);
}
.vip-popup .btn-outline {
    border-color: var(--border);
    color: var(--text-secondary);
    background: transparent;
}
.vip-popup .btn-outline:hover {
    background: var(--surface-alt);
    border-color: var(--primary);
    color: var(--primary);
}
.vip-popup .vip-info-row {
    border-bottom-color: var(--border);
}
.vip-popup .vip-activate-area {
    border-top-color: var(--border);
}
.vip-big-number {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    line-height: 1;
}
.vip-popup.member .vip-big-number {
    color: #f59e0b;
}
.vip-popup.non-member .vip-big-number {
    color: var(--primary);
}
.vip-big-label {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.vip-popup.member .vip-info-value.active {
    color: #f59e0b;
}

[data-theme="dark"] .vip-popup.non-member .vip-popup-header {
    background: linear-gradient(135deg, #1a3a5f, #2563eb);
}
[data-theme="dark"] .vip-popup.member .vip-popup-header {
    background: linear-gradient(135deg, #92400e, #d97706);
}

.vip-success-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: inherit;
    animation: fadeIn 0.3s ease;
}

[data-theme="dark"] .vip-success-overlay {
    background: rgba(26,29,36,0.95);
}

.vip-success-check {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #16a34a, #22c55e);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    animation: vipSuccess 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-bottom: 16px;
}

.vip-success-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    animation: fadeInUp 0.4s ease 0.2s both;
}

.vip-success-sub {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
    animation: fadeInUp 0.4s ease 0.3s both;
}

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

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

@keyframes confetti {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

.confetti-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    animation: confetti 1s ease-out forwards;
    pointer-events: none;
}

.vip-shimmer {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(245,158,11,0.1), transparent);
    animation: shimmer 2s ease-in-out infinite;
    pointer-events: none;
}

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

/* ===== Toast ===== */
.toast-notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: #fff;
    z-index: 99999;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    animation: toastIn 0.3s ease;
    text-align: center;
    max-width: 90vw;
}

.toast-notification.success {
    background: #16a34a;
}

.toast-notification.error {
    background: #dc2626;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.avatar-upload-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar-upload-wrap .avatar-preview-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--surface-alt);
    flex-shrink: 0;
}

.avatar-upload-wrap .avatar-preview-placeholder {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
}

.avatar-upload-btn {
    padding: 7px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.avatar-upload-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.dashboard-title {
    padding: 20px 24px 0;
    font-size: 1.1rem;
    color: var(--text);
    text-align: center;
}

.dashboard-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    margin-top: 8px;
}

.dashboard-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.dashboard-avatar-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 600;
    flex-shrink: 0;
}

.dashboard-user-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.dashboard-user-info strong {
    font-size: 1rem;
    color: var(--text);
}

.dashboard-vip-status {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 2px;
}

.dashboard-vip-badge-img {
    width: 18px;
    height: 18px;
}

.dashboard-section {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

.dashboard-section:last-child {
    border-bottom: none;
    padding-bottom: 24px;
}

.dashboard-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.dashboard-section .form-group {
    margin-bottom: 10px;
}

.dashboard-section .form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.dashboard-section .form-group input,
.dashboard-section .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition);
    background: var(--surface);
    color: var(--text);
    box-sizing: border-box;
}

.dashboard-section .form-group input:focus,
.dashboard-section .form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(26,115,232,0.15);
}

.dashboard-member-info {
    text-align: center;
    padding: 8px 0;
}

.dashboard-member-badge-img {
    width: 48px;
    height: 48px;
}

.db-badge-placeholder {
    font-size: 1rem;
    font-weight: 600;
}

.db-badge-active {
    font-size: 1rem;
    font-weight: 600;
}

.user-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    min-width: 160px;
    z-index: 100;
    overflow: hidden;
    padding-top: 4px;
}

.header-user:hover .user-dropdown { display: block; }
.user-dropdown.show { display: block; }

.user-dropdown-header {
    padding: 10px 16px;
    display: flex;
    flex-direction: column;
}

.user-dropdown-divider {
    height: 1px;
    background: var(--border);
}

.user-dropdown a {
    display: block;
    padding: 8px 16px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: background var(--transition);
}

.user-dropdown a:hover { background: var(--surface-alt); }

/* ===== Site Popup Modal ===== */
.site-popup-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9998;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(2px);
}

.site-popup {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 0;
    max-width: 420px;
    width: 90%;
    position: relative;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    animation: popupIn 0.25s ease;
}

.site-popup-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: rgba(0,0,0,0.4);
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 1.1rem;
    color: #fff;
    cursor: pointer;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: background var(--transition);
}

.site-popup-close:hover { background: rgba(0,0,0,0.6); }

.site-popup h3 {
    font-size: 1rem;
    padding: 20px 24px 0;
    color: var(--text);
}

.site-popup img {
    max-width: 100%;
    display: block;
    margin: 12px auto;
}

.site-popup #site-popup-content {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
    padding: 0 24px 20px;
}

.site-popup #site-popup-content p { margin-bottom: 8px; }

/* ===== Auth Modal ===== */
.auth-modal-new {
    display: flex;
    width: 720px;
    max-height: 85vh;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    animation: popupIn 0.25s ease;
    position: relative;
}

.auth-modal-left {
    width: 280px;
    height: 100%;
    background: linear-gradient(135deg, #1a73e8, #4da6ff);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 28px 20px;
    color: white;
    text-align: center;
    flex-shrink: 0;
}

.auth-ad-img {
    max-width: 100%;
    max-height: 180px;
    border-radius: 10px;
    margin-bottom: 14px;
}

.auth-ad-text h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.auth-ad-text p {
    font-size: 0.8rem;
    opacity: 0.9;
}

.auth-modal-right {
    flex: 1;
    padding: 32px 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow-y: auto;
}

.auth-modal-right h3 {
    font-size: 1.15rem;
    margin-bottom: 20px;
    text-align: center;
}

.auth-links {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
    font-size: 0.8125rem;
}

.auth-links a {
    color: var(--primary);
    text-decoration: none;
}

.auth-links a:hover { text-decoration: underline; }

.auth-modal {
    max-width: 380px;
}

.auth-modal h3 {
    text-align: center;
}

.auth-modal .form-group {
    margin-bottom: 14px;
}

.auth-modal .form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.auth-modal .form-group input,
.auth-modal .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition);
}

.auth-modal .form-group input:focus,
.auth-modal .form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(26,115,232,0.15);
}

.auth-modal-right .form-group input,
.auth-modal-right .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: all 0.2s ease;
    background: var(--surface-alt);
    color: var(--text);
    box-sizing: border-box;
}

.auth-modal-right .form-group input:focus,
.auth-modal-right .form-group textarea:focus {
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
}

.auth-modal-right .form-group input::placeholder {
    color: var(--text-muted);
}

.auth-modal-right .form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.auth-modal-right .form-group {
    margin-bottom: 16px;
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.4;
}

.auth-error {
    color: #dc2626;
    font-size: 0.8125rem;
    margin-bottom: 8px;
    min-height: 1.2em;
}

.auth-switch {
    text-align: center;
    margin-top: 14px;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.auth-switch a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover { text-decoration: underline; }

@media (max-width: 768px) {
    .auth-modal-new { width: 95%; max-height: 90vh; flex-direction: column; overflow-y: auto; }
    .auth-modal-left { width: 100%; height: auto; padding: 20px; }
    .auth-modal-right { padding: 20px 18px; }
}

@media (max-width: 520px) {
    .auth-modal-left { display: none; }
    .auth-modal-new { width: 92%; max-width: 340px; }
}

@media (max-width: 768px) {
    header .container {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .header-right {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        width: 100%;
        order: 2;
        position: static;
        transform: none;
    }

    .header-user-area {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        width: 100%;
        position: static;
    }

    .vip-badge {
        order: -1;
        padding: 3px 10px;
        font-size: 0.7rem;
    }

    .header-auth {
        gap: 6px;
        position: static;
    }

    .auth-btn {
        padding: 6px 14px;
        font-size: 0.75rem;
    }

    .header-user {
        position: static;
    }

    .user-menu-trigger {
        padding: 4px 8px;
    }

    .user-avatar {
        width: 24px;
        height: 24px;
    }

    .user-avatar-placeholder {
        width: 24px;
        height: 24px;
        font-size: 0.65rem;
    }

    .user-nickname {
        font-size: 0.75rem;
        max-width: 60px;
    }

    .site-popup { padding: 24px 20px; max-width: 95vw; }
    .auth-modal { max-width: 95vw; }
}

/* ===== Comments ===== */
.comments-section {
    margin-top: 24px;
}

.comments-section h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.comment-form {
    background: var(--surface-alt);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 20px;
}

.comment-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 80px;
    outline: none;
    transition: border-color var(--transition);
}

.comment-form textarea:focus {
    border-color: var(--primary);
}

.comment-form .btn {
    margin-top: 8px;
}

.comment-login-hint {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 12px;
}

.comment-login-hint a {
    color: var(--primary);
    cursor: pointer;
    font-weight: 500;
}

.comment-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comment-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
}

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

.comment-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.comment-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.comment-meta {
    display: flex;
    flex-direction: column;
}

.comment-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

.comment-time {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.comment-body {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    padding-left: 40px;
}

@media (max-width: 768px) {
    .comment-body { padding-left: 0; margin-top: 6px; }
}

/* ===== Theme Toggle ===== */
.lang-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.lang-btn:hover { border-color: var(--primary); color: var(--primary); }

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--text-secondary);
    font-size: 1rem;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--surface-alt);
}

.header-right {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== Dark mode specifics ===== */
[data-theme="dark"] .drop-zone {
    background: var(--surface-alt);
    border-color: var(--border);
}

[data-theme="dark"] .preview-img-wrap {
    background: repeating-conic-gradient(#22262e 0% 25%, transparent 0% 50%) 50% / 14px 14px;
}

[data-theme="dark"] .crop-selection {
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .filter-thumb {
    background: repeating-conic-gradient(#22262e 0% 25%, transparent 0% 50%) 50% / 8px 8px;
}

[data-theme="dark"] .compress-stats {
    background: var(--surface-alt);
}

[data-theme="dark"] textarea {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] select {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

/* ===== PDF Tool: File List (merge) ===== */
.file-list {
    margin-bottom: 16px;
}

.file-list-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    background: var(--surface-alt);
    font-size: 0.8125rem;
}

.file-list-name {
    flex: 1;
    color: var(--text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== New Tool Styles ===== */
.rmwatermark-canvas {
    cursor: crosshair;
}

.collage-list,
.combine-list,
.img2pdf-list {
    margin-bottom: 12px;
}

#chartmaker-canvas {
    max-width: 100%;
    max-height: 400px;
    display: block;
    margin: 0 auto;
}

.file-list-item .btn + .btn {
    margin-left: 4px;
}

@media (max-width: 768px) {
    .preview-area canvas {
        max-height: 240px;
    }
}

/* ===== Video Tools ===== */
.video-info {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

#panel-videocompress video,
#panel-video2gif video,
#panel-videotrim video,
#panel-videoconvert video {
    max-width: 100%;
    max-height: 400px;
    display: block;
    border-radius: var(--radius-sm);
}

.v2gif-fps-val {
    font-size: 0.875rem;
    color: var(--text);
}

/* ===== File Tools Table Preview ===== */
#excel2pdf-preview table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

#excel2pdf-preview th,
#excel2pdf-preview td {
    border: 1px solid var(--border);
    padding: 6px 10px;
    text-align: left;
    white-space: nowrap;
}

#excel2pdf-preview th {
    background: var(--surface-alt);
    font-weight: 600;
    color: var(--text-secondary);
}

#excel2pdf-preview tr:nth-child(even) {
    background: var(--surface-alt);
}

/* ===== Social Download Links ===== */
#socialdownload-result .file-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-alt);
}