:root {
    color-scheme: light;
    --bg: #f5f7fb;
    --panel-bg: #ffffff;
    --border: #dde3f0;
    --primary: #2f54eb;
    --text-dark: #1f2a44;
    --text-muted: #5f6b7d;
    --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);

    --honey: #fff2a8;
    --mint: #c4f8d3;
    --sky: #c7e7ff;
    --orchid: #e5d4f8;
    --sunset: #ffd1ba;
    --input-column: 1fr;
    --reader-column: 1.2fr;
    --annotation-column: 1fr;
    --reader-column-collapsed: 1.4fr;
    --annotation-column-collapsed: 1fr;
}

/* 暗黑模式 */
[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0f172a;
    --panel-bg: #1e293b;
    --border: #334155;
    --primary: #60a5fa;
    --text-dark: #f1f5f9;
    --text-muted: #cbd5e1;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.4);

    --honey: #9a7b00;
    --mint: #065f46;
    --sky: #075985;
    --orchid: #6b21a8;
    --sunset: #c2410c;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', 'PingFang SC', sans-serif;
    background: var(--bg);
    color: var(--text-dark);
    min-height: 100%;
}

body {
    display: flex;
    justify-content: center;
}

.app {
    width: min(1600px, 100%);
    padding: 32px 24px 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.app-header h1 {
    margin: 0;
    font-size: 24px;
}

.app-header p {
    margin: 8px 0 0;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.legend {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.legend-item {
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    background: rgba(47, 84, 235, 0.08);
    color: var(--text-dark);
    transition: all 0.2s ease;
    cursor: default;
    border: 2px solid transparent;
}

.legend-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.legend-item[data-category="vocab"] {
    background: var(--honey);
    color: #92400e;
    border-color: rgba(146, 64, 14, 0.2);
}

.legend-item[data-category="phrase"] {
    background: var(--mint);
    color: #065f46;
    border-color: rgba(6, 95, 70, 0.2);
}

.legend-item[data-category="difficulty"] {
    background: var(--orchid);
    color: #5b21b6;
    border-color: rgba(91, 33, 182, 0.2);
}

.legend-item[data-category="keypoint"] {
    background: var(--sunset);
    color: #9b1c1c;
    border-color: rgba(155, 28, 28, 0.2);
}
.legend-item[data-category="handwriting"] {
    background: #e0f2fe;
    color: #0369a1;
    border-color: rgba(3, 105, 161, 0.2);
}


.layout {
    display: grid;
    gap: 24px;
    grid-template-columns: minmax(0, var(--input-column, 1fr)) minmax(0, var(--reader-column, 1.2fr)) minmax(0, var(--annotation-column, 1fr));
}

.layout.input-collapsed {
    grid-template-columns: minmax(0, var(--reader-column-collapsed, 1.4fr)) minmax(0, var(--annotation-column-collapsed, 1fr));
}

.layout.input-collapsed .input-panel {
    display: none;
}

.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    min-height: 480px;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.panel-header h2 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.panel-header button {
    white-space: nowrap;
    font-size: 13px;
    padding: 6px 12px;
}

.panel-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

textarea#sourceText {
    resize: vertical;
    min-height: 240px;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 16px;
    font-size: 15px;
    line-height: 1.6;
    font-family: inherit;
}

.input-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 13px;
}

.quick-templates {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.reading-area {
    flex: 1;
    position: relative;
    border-radius: 16px;
    border: 2px dashed var(--border);
    padding: 24px 28px;
    font-size: 17px;
    line-height: 1.9;
    background: linear-gradient(135deg, #fafbff 0%, #f8f9ff 100%);
    overflow: auto;
    transition: all 0.3s ease;
}

.handwriting-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 30;
    touch-action: none;
}

.handwriting-overlay.active {
    pointer-events: auto;
}

.reading-area.handwriting-active {
    cursor: crosshair;
}


.reading-area:hover {
    border-color: rgba(47, 84, 235, 0.3);
    background: #fafbff;
}

.reading-area:focus-within {
    border-style: solid;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.1);
}

.reading-area p {
    margin: 0 0 1.2em;
    padding: 4px 8px;
    margin-left: -8px;
    margin-right: -8px;
    transition: background 0.2s ease;
}

.reading-area p:hover {
    background: rgba(47, 84, 235, 0.02);
    border-radius: 8px;
}

.reading-area .placeholder {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: 40px 20px;
}

.reader-tools {
    display: flex;
    gap: 8px;
}

.annotations-panel .filters {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* 紧凑的摘要显示 */
.annotation-summary {
    display: flex;
    gap: 12px;
    padding: 8px 12px;
    background: rgba(47, 84, 235, 0.03);
    border-radius: 8px;
    flex-wrap: wrap;
}

.annotation-summary article {
    display: flex;
    align-items: center;
    gap: 6px;
}

.annotation-summary .summary-label {
    margin: 0;
    font-size: 12px;
    color: var(--text-muted);
}

.annotation-summary .summary-value {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.category-metrics {
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.category-metrics .empty {
    margin: 0;
    padding: 12px;
    text-align: center;
    color: var(--text-muted);
    background: rgba(47, 84, 235, 0.04);
    border: 1px dashed var(--border);
    border-radius: 12px;
    grid-column: 1 / -1;
}

.metric-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    background: rgba(47, 84, 235, 0.03);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.metric-card .metric-label {
    margin: 0;
    font-size: 12px;
    color: var(--text-muted);
}

.metric-card .metric-value {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.metric-card .metric-share {
    margin: 0;
    font-size: 11px;
    color: var(--text-muted);
}

.metric-card[data-category="vocab"] {
    border-left: 4px solid #92400e;
}

.metric-card[data-category="phrase"] {
    border-left: 4px solid #065f46;
}

.metric-card[data-category="difficulty"] {
    border-left: 4px solid #5b21b6;
}

.metric-card[data-category="keypoint"] {
    border-left: 4px solid #9b1c1c;
}

.metric-card[data-category="translation"] {
    border-left: 4px solid #1d4ed8;
}

.metric-card.custom {
    border-left: 4px solid var(--primary);
}

.filters select,
.filters input[type="search"] {
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
}

.batch-operations {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    padding: 12px;
    background: rgba(47, 84, 235, 0.05);
    border-radius: 12px;
    margin-bottom: 12px;
}

[data-theme="dark"] .batch-operations {
    background: rgba(96, 165, 250, 0.1);
}

.batch-operations select {
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    font-size: 13px;
    background: var(--panel-bg);
    color: var(--text-dark);
}

.batch-checkbox {
    width: 18px;
    height: 18px;
    margin-right: 12px;
    cursor: pointer;
}

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

.grammar-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.grammar-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.grammar-item strong {
    min-width: 100px;
    color: var(--text-dark);
}

.grammar-item span:last-child {
    color: var(--text-muted);
    font-size: 13px;
}

/* 统计分析面板 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.stat-card {
    background: rgba(47, 84, 235, 0.05);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
}

[data-theme="dark"] .stat-card {
    background: rgba(96, 165, 250, 0.1);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.stats-chart {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chart-bar {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chart-bar-label {
    min-width: 80px;
    font-size: 13px;
    color: var(--text-dark);
}

.chart-bar-track {
    flex: 1;
    height: 24px;
    background: rgba(148, 163, 184, 0.2);
    border-radius: 12px;
    overflow: hidden;
}

.chart-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 12px;
    transition: width 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
}

.chart-bar-value {
    font-size: 11px;
    color: white;
    font-weight: 600;
}

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

.stats-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: rgba(148, 163, 184, 0.1);
    border-radius: 8px;
}

.stats-list-rank {
    width: 24px;
    height: 24px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
}

.stats-list-word {
    flex: 1;
    margin-left: 12px;
    font-weight: 500;
    color: var(--text-dark);
}

.stats-list-count {
    font-size: 13px;
    color: var(--text-muted);
}

.stats-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.stats-tag {
    background: rgba(47, 84, 235, 0.1);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
}

[data-theme="dark"] .stats-tag {
    background: rgba(96, 165, 250, 0.2);
}

.annotation-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow: auto;
}

/* 分组样式 */
.annotation-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.annotation-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: linear-gradient(135deg, rgba(47, 84, 235, 0.08) 0%, rgba(47, 84, 235, 0.04) 100%);
    border-radius: 8px;
    border-left: 3px solid var(--primary);
}

.annotation-group-header h3 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.annotation-group-header .count {
    background: var(--primary);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

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

/* 简化的标注项 */
.annotation-item-simple {
    padding: 10px 12px;
    background: rgba(47, 84, 235, 0.02);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.annotation-item-simple:hover {
    background: rgba(47, 84, 235, 0.06);
    border-color: var(--primary);
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(47, 84, 235, 0.1);
}

.annotation-item-simple .annotation-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.annotation-item-simple .annotation-text:hover {
    color: var(--primary);
}

/* 出现次数标记 */
.occurrence-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
    transition: all 0.2s ease;
}

.occurrence-badge:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 8px rgba(37, 99, 235, 0.3);
}

.annotation-item-simple .annotation-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
    padding-left: 12px;
    border-left: 2px solid rgba(47, 84, 235, 0.2);
}

.annotation-item-simple .annotation-tags {
    margin-top: 6px;
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

/* 保留旧的样式用于兼容 */
.annotation-item {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: rgba(47, 84, 235, 0.02);
}

.annotation-item header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.annotation-item .category {
    font-weight: 600;
    color: var(--text-dark);
}

.annotation-item .excerpt {
    margin: 0;
    font-size: 15px;
}

.annotation-item .note {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
}

.annotation-item .tags {
    margin: 0;
    font-size: 13px;
    color: var(--primary);
}

.item-actions {
    display: inline-flex;
    gap: 6px;
}

button {
    border: none;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s ease, box-shadow 0.2s ease;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(47, 84, 235, 0.2);
}

button:active {
    transform: translateY(0);
}

button.ghost-btn {
    background: rgba(47, 84, 235, 0.1);
    color: var(--primary);
    box-shadow: none;
}

button.ghost-btn:hover {
    box-shadow: none;
    background: rgba(47, 84, 235, 0.18);
}

button.primary {
    background: var(--primary);
}

button[data-action="delete"] {
    background: #f87171;
}

button[data-action="delete"]:hover {
    box-shadow: 0 8px 20px rgba(248, 113, 113, 0.32);
}

.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.selection-toolbar {
    position: fixed;
    min-width: 240px;
    max-width: 280px;
    background: #0f172a;
    color: #f8fafc;
    padding: 8px;
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.1);
    z-index: 1000;
    display: grid;
    gap: 6px;
    animation: toolbarSlideIn 0.2s ease-out;
}

@keyframes toolbarSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.selection-toolbar form {
    display: grid;
    gap: 6px;
}

/* 紧凑工具栏布局 */
.toolbar-compact {
    display: grid;
    gap: 6px;
}

.toolbar-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.toolbar-row .color-palette.compact {
    display: flex;
    gap: 4px;
    flex: 1;
}

.toolbar-row .color-palette.compact button {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.toolbar-row .color-palette.compact button:hover {
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.toolbar-row .color-palette.compact button.active {
    border-color: #fff;
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.5);
}

.toolbar-row .quick-btn {
    min-width: 36px;
    height: 32px;
    padding: 0 10px;
    background: #10b981;
    color: white;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
}

.toolbar-row .quick-btn:hover {
    background: #059669;
}

.toolbar-row .toggle-advanced-btn.compact {
    min-width: 32px;
    height: 32px;
    padding: 0;
    background: rgba(148, 163, 184, 0.2);
    border-radius: 8px;
    font-size: 18px;
    transition: all 0.2s ease;
}

.toolbar-row .toggle-advanced-btn.compact:hover {
    background: rgba(148, 163, 184, 0.3);
}

.toolbar-row .toggle-advanced-btn.compact.active {
    background: #38bdf8;
    transform: rotate(90deg);
}

/* 类别行 */
.categories-row .category-buttons.compact {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    width: 100%;
}

.categories-row .category-buttons.compact button {
    background: rgba(148, 163, 184, 0.28);
    color: #f8fafc;
    border-radius: 6px;
    padding: 8px 6px;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.categories-row .category-buttons.compact button:hover {
    background: rgba(148, 163, 184, 0.4);
}

.categories-row .category-buttons.compact button.active {
    background: #38bdf8;
    box-shadow: 0 2px 8px rgba(56, 189, 248, 0.3);
}

/* 紧凑字段集 */
.selection-toolbar fieldset.compact {
    padding: 6px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
}

.selection-toolbar fieldset {
    border: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 4px;
}

.selection-toolbar legend {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(248, 250, 252, 0.6);
    margin-bottom: 2px;
}

.category-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.category-buttons button {
    background: rgba(148, 163, 184, 0.28);
    color: #f8fafc;
    border-radius: 6px;
    padding: 5px 8px;
    font-size: 11px;
    font-weight: 500;
    box-shadow: none;
    transition: all 0.15s ease;
}

.category-buttons button:hover {
    background: rgba(148, 163, 184, 0.4);
    transform: translateY(-1px);
}

.category-buttons button.active {
    background: #38bdf8;
    box-shadow: 0 2px 8px rgba(56, 189, 248, 0.3);
}

/* 语法分析按钮颜色指示器 */
.grammar-buttons button {
    position: relative;
    padding-left: 24px;
}

.grammar-buttons button::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.grammar-buttons button[data-category="mainSubject"]::before { background: #000000; }
.grammar-buttons button[data-category="clauseSubject"]::before { background: #059669; }
.grammar-buttons button[data-category="mainVerb"]::before { background: #dc2626; }
.grammar-buttons button[data-category="clauseVerb"]::before { background: #991b1b; }
.grammar-buttons button[data-category="object"]::before { background: #ea580c; }
.grammar-buttons button[data-category="attribute"]::before { background: #9333ea; }
.grammar-buttons button[data-category="adverbial"]::before { background: #2563eb; }
.grammar-buttons button[data-category="conjunction"]::before { background: #0891b2; }
.grammar-buttons button[data-category="clauseMarker"]::before { background: #ec4899; }

.style-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.color-palette {
    display: inline-flex;
    gap: 6px;
}

.color-palette button {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    padding: 0;
    border: 2px solid transparent;
    transition: all 0.15s ease;
    box-shadow: none;
}

.color-palette button[data-color="honey"] { background: var(--honey); }
.color-palette button[data-color="mint"] { background: var(--mint); }
.color-palette button[data-color="sky"] { background: var(--sky); }
.color-palette button[data-color="orchid"] { background: var(--orchid); }
.color-palette button[data-color="sunset"] { background: var(--sunset); }

.color-palette button.active {
    border-color: #38bdf8;
}

.underline-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(248, 250, 252, 0.8);
}

.field {
    display: grid;
    gap: 4px;
}

.field span {
    font-size: 11px;
    color: rgba(248, 250, 252, 0.6);
}

.field textarea,
.field input {
    border-radius: 6px;
    border: none;
    padding: 5px 8px;
    font-size: 12px;
    font-family: inherit;
    resize: vertical;
}

.field textarea {
    min-height: 40px;
}

.toolbar-actions {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    margin-top: 2px;
}

.toolbar-actions button {
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 12px;
}

/* 工具栏选项卡样式 v4.2.4 */
.toolbar-tabs {
    display: flex;
    gap: 2px;
    margin-bottom: 8px;
    background: rgba(148, 163, 184, 0.1);
    padding: 2px;
    border-radius: 6px;
}

.toolbar-tab {
    flex: 1;
    padding: 5px 8px;
    font-size: 11px;
    font-weight: 500;
    background: transparent;
    color: rgba(248, 250, 252, 0.7);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.toolbar-tab:hover {
    background: rgba(148, 163, 184, 0.2);
    color: #f8fafc;
}

.toolbar-tab.active {
    background: #38bdf8;
    color: #0f172a;
}

.toolbar-tab-content {
    display: none;
}

.toolbar-tab-content.active {
    display: grid;
    gap: 6px;
}

/* 优化工具栏最大高度，添加滚动 */
.selection-toolbar {
    max-height: 80vh;
    overflow-y: auto;
}

.selection-toolbar::-webkit-scrollbar {
    width: 6px;
}

.selection-toolbar::-webkit-scrollbar-track {
    background: rgba(148, 163, 184, 0.1);
    border-radius: 3px;
}

.selection-toolbar::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.3);
    border-radius: 3px;
}

.selection-toolbar::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.5);
}

.highlight {
    display: inline; /* 确保是内联元素，支持自然换行 */
    border-radius: 6px;
    padding: 2px 4px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
    vertical-align: baseline; /* 确保垂直对齐正常 */
}

.highlight::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 8px;
    background: currentColor;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.highlight:hover::before {
    opacity: 0.1;
}

.highlight:hover {
    /* 移除 transform，避免换行文本显示异常 */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    /* 使用轻微的背景色变化替代位移效果 */
    filter: brightness(0.98);
}

.highlight[data-color="honey"] {
    background-color: var(--honey);
    box-shadow: 0 1px 3px rgba(146, 64, 14, 0.1);
    opacity: var(--highlight-opacity, 1);
}

.highlight[data-color="mint"] {
    background-color: var(--mint);
    box-shadow: 0 1px 3px rgba(6, 95, 70, 0.1);
    opacity: var(--highlight-opacity, 1);
}

.highlight[data-color="sky"] {
    background-color: var(--sky);
    box-shadow: 0 1px 3px rgba(2, 132, 199, 0.1);
    opacity: var(--highlight-opacity, 1);
}

.highlight[data-color="orchid"] {
    background-color: var(--orchid);
    box-shadow: 0 1px 3px rgba(91, 33, 182, 0.1);
    opacity: var(--highlight-opacity, 1);
}

.highlight[data-color="sunset"] {
    background-color: var(--sunset);
    box-shadow: 0 1px 3px rgba(155, 28, 28, 0.1);
    opacity: var(--highlight-opacity, 1);
}

/* 下划线基础样式 - 只在没有背景颜色时设为透明 */
.highlight[data-underline="true"]:not([data-color]):not([style*="background"]) {
    background-color: transparent;
    box-shadow: none;
}

.highlight[data-underline="true"] {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

/* 叠加标注下划线样式 - 支持多层错位 */
.highlight[data-nest-level="1"][data-underline="true"] {
    text-underline-offset: 5px;
}

.highlight[data-nest-level="2"][data-underline="true"] {
    text-underline-offset: 8px;
}

.highlight[data-nest-level="3"][data-underline="true"] {
    text-underline-offset: 11px;
}

.highlight[data-nest-level="4"][data-underline="true"] {
    text-underline-offset: 14px;
}

/* 叠加标注背景色混合 - 所有highlight元素都应用颜色混合并添加层次阴影 */
.highlight {
    mix-blend-mode: multiply;
    position: relative;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}

/* 根据嵌套层级添加不同的阴影效果，创造上下层次感 - 层级越高阴影越深 */
.highlight[data-nest-level="1"] {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.18), 0 1px 3px rgba(0, 0, 0, 0.12) !important;
    z-index: 2;
}

.highlight[data-nest-level="2"] {
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.24), 0 2px 4px rgba(0, 0, 0, 0.16) !important;
    z-index: 3;
}

.highlight[data-nest-level="3"] {
    box-shadow: 0 4px 9px rgba(0, 0, 0, 0.3), 0 3px 6px rgba(0, 0, 0, 0.2) !important;
    z-index: 4;
}

.highlight[data-nest-level="4"] {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.36), 0 4px 8px rgba(0, 0, 0, 0.24) !important;
    z-index: 5;
}

.highlight-preview {
    opacity: 0.85;
    animation: preview-pulse 1.5s ease-in-out infinite;
}

@keyframes preview-pulse {
    0%, 100% { opacity: 0.85; }
    50% { opacity: 1; }
}

/* 临时高亮样式 - 用于显示所有连接的标注 */
.highlight.temp-highlight {
    animation: temp-highlight-pulse 1.5s ease-in-out 2;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5), 0 4px 12px rgba(59, 130, 246, 0.3) !important;
    position: relative;
    z-index: 10;
}

@keyframes temp-highlight-pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5), 0 4px 12px rgba(59, 130, 246, 0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 5px rgba(59, 130, 246, 0.7), 0 6px 16px rgba(59, 130, 246, 0.5);
    }
}

/* Category 默认颜色 - 只在没有自定义颜色和文本颜色设置时生效 */
.highlight[data-category="vocab"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #92400e; }
.highlight[data-category="phrase"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #065f46; }
.highlight[data-category="difficulty"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #5b21b6; }
.highlight[data-category="keypoint"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #9b1c1c; }
.highlight[data-category="translation"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #1d4ed8; }

/* 语法分析标注颜色 - 只在没有自定义颜色时生效 */
.highlight[data-category="mainSubject"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #000000; font-weight: 600; }
.highlight[data-category="clauseSubject"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #059669; font-weight: 600; }
.highlight[data-category="mainVerb"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #dc2626; font-weight: 600; }
.highlight[data-category="clauseVerb"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #991b1b; font-weight: 600; }
.highlight[data-category="object"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #ea580c; font-weight: 500; }
.highlight[data-category="attribute"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #9333ea; }
.highlight[data-category="adverbial"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #2563eb; }
.highlight[data-category="conjunction"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #0891b2; font-weight: 500; }
.highlight[data-category="clauseMarker"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #ec4899; font-weight: 600; }

/* 暗黑模式下的学习标注颜色 - 只在没有自定义颜色时生效 */
[data-theme="dark"] .highlight[data-category="vocab"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #fbbf24; }
[data-theme="dark"] .highlight[data-category="phrase"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #6ee7b7; }
[data-theme="dark"] .highlight[data-category="difficulty"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #c084fc; }
[data-theme="dark"] .highlight[data-category="keypoint"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #f87171; }
[data-theme="dark"] .highlight[data-category="translation"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #60a5fa; }

/* 暗黑模式下的语法标注颜色 - 只在没有自定义颜色时生效 */
[data-theme="dark"] .highlight[data-category="mainSubject"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #f3f4f6; }
[data-theme="dark"] .highlight[data-category="clauseSubject"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #6ee7b7; }
[data-theme="dark"] .highlight[data-category="mainVerb"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #f87171; }
[data-theme="dark"] .highlight[data-category="clauseVerb"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #fca5a5; }
[data-theme="dark"] .highlight[data-category="object"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #fb923c; }
[data-theme="dark"] .highlight[data-category="attribute"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #c084fc; }
[data-theme="dark"] .highlight[data-category="adverbial"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #60a5fa; }
[data-theme="dark"] .highlight[data-category="conjunction"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #22d3ee; }
[data-theme="dark"] .highlight[data-category="clauseMarker"]:not([style*="color"]):not([data-text-color]:not([data-text-color="default"])) { color: #f9a8d4; }

.tags.badge {
    display: inline-flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tag-pill {
    background: rgba(203, 213, 225, 0.35);
    color: var(--text-dark);
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
}

/* 平板和移动端响应式布局 */
@media (max-width: 1100px) {
    .layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .layout.input-collapsed {
        grid-template-columns: minmax(0, 1fr);
    }

    .panel {
        min-height: auto;
    }
}

/* 移动端优化 */
@media (max-width: 768px) {
    .app {
        padding: 16px 12px 24px;
        gap: 16px;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        gap: 8px;
    }

    .panel {
        border-radius: 12px;
        padding: 16px;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .reader-tools {
        width: 100%;
        flex-direction: column;
        gap: 12px;
    }

    .formatting-toolbar {
        flex-wrap: wrap;
        gap: 8px;
    }

    /* 工具栏移动端适配 */
    .selection-toolbar {
        min-width: calc(100vw - 32px);
        max-width: calc(100vw - 32px);
        left: 16px !important;
        right: 16px !important;
    }

    .toolbar-row .color-palette.compact {
        flex-wrap: nowrap;
        overflow-x: auto;
    }
}

/* 小屏幕移动端 */
@media (max-width: 480px) {
    .app {
        padding: 12px 8px 16px;
        gap: 12px;
    }

    .categories-row .category-buttons.compact {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .categories-row .category-buttons.compact button {
        font-size: 11px;
        padding: 6px 4px;
    }

    .toolbar-row .quick-btn,
    .toolbar-row .toggle-advanced-btn.compact {
        min-width: 28px;
        height: 28px;
        font-size: 14px;
    }

    .toolbar-row .color-palette.compact button {
        width: 28px;
        height: 28px;
    }

    /* 工具栏按钮触摸优化 */
    .ghost-btn {
        min-height: 44px;
        padding: 8px 12px;
    }

    .primary {
        min-height: 44px;
        padding: 10px 20px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    /* 增加触摸目标最小尺寸 */
    button,
    .category-buttons button,
    .color-palette button,
    .style-toggle {
        min-height: 44px;
        min-width: 44px;
    }

    /* 增加间距 */
    .toolbar-row {
        gap: 8px;
    }

    .categories-row .category-buttons.compact {
        gap: 6px;
    }
}

/* 标注快捷菜单 - 横向布局，仅图标 */
.highlight-context-menu {
    position: fixed;
    background: white;
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05);
    padding: 6px;
    z-index: 9998;
    display: flex;
    flex-direction: row;
    gap: 4px;
    opacity: 1;
    transform: scale(1);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.highlight-context-menu.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
}

.context-menu-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-dark);
    position: relative;
}

.context-menu-item:hover {
    background: rgba(47, 84, 235, 0.1);
    transform: scale(1.1);
}

.context-menu-item[data-action="delete"]:hover {
    background: rgba(248, 113, 113, 0.1);
    color: #dc2626;
}

.context-menu-item .context-menu-icon {
    font-size: 20px;
}

/* 隐藏文字，只显示图标 */
.context-menu-item .context-menu-text {
    display: none;
}

/* 暗黑模式适配 */
[data-theme="dark"] .highlight-context-menu {
    background: var(--panel-bg);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .context-menu-item {
    color: var(--text-dark);
}

[data-theme="dark"] .context-menu-item:hover {
    background: rgba(96, 165, 250, 0.15);
}

/* 行内笔记编辑器 */
.inline-note-editor {
    background: white;
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05);
    padding: 12px;
    min-width: 300px;
    max-width: 500px;
    animation: fadeInUp 0.2s ease;
}

.inline-note-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    margin-bottom: 10px;
}

.inline-note-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.1);
}

.inline-note-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.inline-note-delete,
.inline-note-save {
    padding: 6px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.15s ease;
}

.inline-note-delete {
    background: rgba(248, 113, 113, 0.1);
    color: #dc2626;
}

.inline-note-delete:hover {
    background: rgba(248, 113, 113, 0.2);
}

.inline-note-save {
    background: var(--primary);
    color: white;
}

.inline-note-save:hover {
    background: #3B5EC9;
}

/* 笔记指示器 */
.note-indicator {
    position: absolute;
    top: -8px;
    right: -8px;
    padding: 2px 4px;
    font-size: 12px;
    color: #fff;
    background: var(--primary);
    border-radius: 6px;
    cursor: help;
    font-weight: bold;
    z-index: 10;
    box-shadow: 0 2px 6px rgba(47, 84, 235, 0.3);
    line-height: 1;
    pointer-events: none;
}

.highlight {
    position: relative;
}

.highlight:hover .note-indicator {
    background: #3B5EC9;
    transform: scale(1.1);
}

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

/* TTS控制栏 */
.tts-controls {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    background: rgba(47, 84, 235, 0.05);
    border-radius: 8px;
    margin-bottom: 12px;
    gap: 8px;
}

.tts-controls.hidden {
    display: none;
}

.tts-controls button {
    background: white;
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.15s ease;
}

.tts-controls button:hover {
    background: rgba(47, 84, 235, 0.1);
    border-color: var(--primary);
}

.tts-controls button:active {
    transform: scale(0.95);
}

[data-theme="dark"] .tts-controls {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .tts-controls button {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-dark);
}

/* 快速翻译按钮 */
.quick-translate-btn {
    position: fixed;
    z-index: 9997;
    opacity: 1;
    transform: translateY(-10px) scale(1);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.quick-translate-btn.hidden {
    opacity: 0;
    transform: translateY(-10px) scale(0.9);
    pointer-events: none;
}

.quick-translate-btn button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(47, 84, 235, 0.3);
    transition: all 0.15s ease;
}

.quick-translate-btn button:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(47, 84, 235, 0.4);
}

.quick-translate-btn button:active {
    transform: translateY(0);
}

/* 快捷键面板 */
.shortcuts-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.shortcuts-modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.shortcuts-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
}

.shortcuts-modal__content {
    position: relative;
    background: white;
    border-radius: 20px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.shortcuts-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, #f8f9ff 0%, #f3f5ff 100%);
}

.shortcuts-modal__header h2 {
    margin: 0;
    font-size: 24px;
    color: var(--text-dark);
}

.shortcuts-modal__close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(31, 42, 68, 0.08);
    color: var(--text-dark);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shortcuts-modal__close:hover {
    background: rgba(248, 113, 113, 0.15);
    color: #dc2626;
    transform: rotate(90deg);
}

.shortcuts-modal__body {
    padding: 28px;
    overflow-y: auto;
    flex: 1;
}

.shortcuts-section {
    margin-bottom: 28px;
}

.shortcuts-section:last-child {
    margin-bottom: 0;
}

.shortcuts-section h3 {
    margin: 0 0 16px;
    font-size: 16px;
    color: var(--text-dark);
    font-weight: 600;
}

.shortcuts-list {
    display: grid;
    gap: 12px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(47, 84, 235, 0.04);
    border-radius: 10px;
    border: 1px solid rgba(47, 84, 235, 0.1);
    transition: all 0.2s ease;
}

.shortcut-item:hover {
    background: rgba(47, 84, 235, 0.08);
    border-color: rgba(47, 84, 235, 0.2);
    transform: translateX(4px);
}

.shortcut-item kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 10px;
    background: white;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05), inset 0 -2px 0 rgba(0, 0, 0, 0.1);
}

.shortcut-item span {
    flex: 1;
    color: var(--text-muted);
    font-size: 14px;
}

.shortcuts-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.shortcuts-tips li {
    padding: 8px 12px;
    margin-bottom: 8px;
    background: rgba(251, 191, 36, 0.1);
    border-left: 3px solid #f59e0b;
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 13px;
}

.shortcuts-tips li:last-child {
    margin-bottom: 0;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
.annotation-list .empty {
    margin: 24px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

.highlight.pulse {
    animation: pulse-highlight 1s ease-out;
}

@keyframes pulse-highlight {
    0% {
        box-shadow: 0 0 0 0 rgba(47, 84, 235, 0.6);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(47, 84, 235, 0);
        transform: scale(1.05);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(47, 84, 235, 0);
        transform: scale(1);
    }
}

/* 添加加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.annotation-item {
    animation: fadeInUp 0.4s ease-out;
}

.annotation-item:nth-child(1) { animation-delay: 0s; }
.annotation-item:nth-child(2) { animation-delay: 0.05s; }
.annotation-item:nth-child(3) { animation-delay: 0.1s; }
.annotation-item:nth-child(4) { animation-delay: 0.15s; }
.annotation-item:nth-child(5) { animation-delay: 0.2s; }
.document-manager {
    border-top: 1px solid var(--border);
    padding-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.document-manager__header h3 {
    margin: 0;
    font-size: 16px;
}

.document-manager__header p {
    margin: 4px 0 0;
    color: var(--text-muted);
    font-size: 13px;
}

.document-manager__empty {
    margin: 0;
    padding: 12px;
    border: 1px dashed var(--border);
    border-radius: 12px;
    background: rgba(47, 84, 235, 0.04);
    color: var(--text-muted);
    font-size: 13px;
}

.document-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 220px;
    overflow: auto;
}

.document-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #f7f9ff;
    transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.document-item.active {
    border-color: var(--primary);
    background: rgba(47, 84, 235, 0.12);
    box-shadow: 0 6px 18px rgba(47, 84, 235, 0.12);
}

.document-item__title {
    flex: 1;
    background: none;
    border: none;
    padding: 0;
    text-align: left;
    font: inherit;
    color: var(--text-dark);
    cursor: pointer;
}

.document-item__title:hover,
.document-item.active .document-item__title {
    color: var(--primary);
}

.document-item__meta {
    font-size: 12px;
    color: var(--text-muted);
}

.document-item__actions {
    display: flex;
    gap: 6px;
}

.document-item__actions button {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: rgba(31, 42, 68, 0.06);
    color: var(--text-muted);
    cursor: pointer;
}

.document-item__actions button:hover {
    background: rgba(47, 84, 235, 0.12);
    color: var(--primary);
}

.reader-tools {
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.width-control,
.font-size-control,
.line-height-control {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #f1f4ff;
}

[data-theme="dark"] .width-control,
[data-theme="dark"] .font-size-control,
[data-theme="dark"] .line-height-control {
    background: rgba(96, 165, 250, 0.1);
}

.width-control label,
.font-size-control label,
.line-height-control label {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

.width-control input[type="range"] {
    width: 140px;
}

.font-size-control input[type="range"],
.line-height-control input[type="range"] {
    width: 120px;
}

.width-control span,
.font-size-control span,
.line-height-control span {
    font-size: 12px;
    color: var(--text-muted);
    min-width: 42px;
    text-align: right;
}

.selection-toolbar .toolbar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.selection-toolbar .toolbar-shortcuts {
    display: flex;
    gap: 4px;
    align-items: center;
}

.selection-toolbar .toolbar-shortcuts button {
    background: rgba(148, 163, 184, 0.25);
    color: #f8fafc;
    border-radius: 6px;
    padding: 4px 8px;
    font-size: 11px;
}

.selection-toolbar .toolbar-shortcuts button:hover {
    background: rgba(148, 163, 184, 0.4);
}

.toggle-advanced-btn {
    background: rgba(148, 163, 184, 0.2);
    border: none;
    border-radius: 6px;
    padding: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    color: #f8fafc;
}

.toggle-advanced-btn:hover {
    background: rgba(148, 163, 184, 0.35);
}

.toggle-advanced-btn.active {
    background: #38bdf8;
    transform: rotate(90deg);
}

.toolbar-basic {
    display: grid;
    gap: 6px;
}

.toolbar-advanced {
    display: grid;
    gap: 6px;
    margin-top: 8px;
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    padding-top: 8px;
    animation: advancedSlideDown 0.3s ease-out;
    overflow: hidden;
}

.toolbar-advanced.hidden {
    display: none;
}

@keyframes advancedSlideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        max-height: 500px;
        transform: translateY(0);
    }
}

.ghost-btn.compact {
    padding: 4px 8px;
    font-size: 11px;
}

@media (max-width: 1100px) {
    .width-control input[type="range"] {
        width: 110px;
    }
}

@media (max-width: 960px) {
    .document-manager__empty {
        font-size: 12px;
    }

    .document-item {
        flex-wrap: wrap;
    }

    .document-item__actions {
        margin-left: auto;
    }
}
.document-item__title:focus-visible,
.document-item__actions button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.formatting-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: linear-gradient(135deg, #f8f9ff 0%, #f3f5ff 100%);
    box-shadow: 0 2px 8px rgba(47, 84, 235, 0.06);
    flex-wrap: wrap;

    /* 粘性定位 - 跟随滚动 */
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow 0.3s ease, background 0.3s ease;
}

.formatting-toolbar.is-stuck {
    box-shadow: 0 4px 16px rgba(47, 84, 235, 0.15);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    border-bottom: 2px solid var(--primary-light);
}

.formatting-toolbar .format-group {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    position: relative;
}

.formatting-toolbar .format-group::after {
    content: '';
    position: absolute;
    right: -6px;
    height: 20px;
    width: 1px;
    background: var(--border);
}

.formatting-toolbar .format-group:last-of-type::after {
    display: none;
}

.formatting-toolbar .format-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid transparent;
    background: #fff;
    color: var(--text-dark);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.formatting-toolbar .format-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.formatting-toolbar .format-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(47, 84, 235, 0.15);
}

.formatting-toolbar .format-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(47, 84, 235, 0.08);
    box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.1);
}

.formatting-toolbar .format-color {
    width: 26px;
    height: 26px;
    min-width: 26px;
    min-height: 26px;
    max-width: 26px;
    max-height: 26px;
    padding: 0;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
    aspect-ratio: 1 / 1;
}

.formatting-toolbar .format-color::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.formatting-toolbar .format-color:hover {
    transform: scale(1.1) translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.formatting-toolbar .format-color[data-color="honey"] { background: var(--honey); }
.formatting-toolbar .format-color[data-color="mint"] { background: var(--mint); }
.formatting-toolbar .format-color[data-color="sky"] { background: var(--sky); }
.formatting-toolbar .format-color[data-color="orchid"] { background: var(--orchid); }
.formatting-toolbar .format-color[data-color="sunset"] { background: var(--sunset); }

.formatting-toolbar .format-color.active {
    border-color: var(--primary);
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(47, 84, 235, 0.15), 0 4px 12px rgba(0, 0, 0, 0.2);
}

.formatting-toolbar .format-color.active::after {
    border-color: var(--primary);
    animation: pulse-ring 1.5s ease-out infinite;
}

.formatting-toolbar .format-border-btn,
.formatting-toolbar .format-emoji-btn {
    min-width: 28px;
    height: 28px;
    padding: 0 6px;
    border-radius: 6px;
    border: 2px solid transparent;
    background: var(--panel-bg);
    color: var(--text-dark);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.formatting-toolbar .format-border-btn:hover,
.formatting-toolbar .format-emoji-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(47, 84, 235, 0.15);
    background: rgba(47, 84, 235, 0.05);
}

.formatting-toolbar .format-border-btn.active,
.formatting-toolbar .format-emoji-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
    box-shadow: 0 0 0 4px rgba(47, 84, 235, 0.2);
    transform: scale(1.1);
    font-weight: 600;
}

@keyframes pulse-ring {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.formatting-toolbar .format-apply {
    margin-left: auto;
    padding: 7px 16px;
    background: var(--primary);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    font-size: 13px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(47, 84, 235, 0.3);
    position: relative;
    overflow: hidden;
}

.formatting-toolbar .format-apply::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.formatting-toolbar .format-apply:hover {
    background: #1f3acb;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(47, 84, 235, 0.4);
}

.formatting-toolbar .format-apply:hover::before {
    opacity: 1;
}

.formatting-toolbar .format-apply.active {
    background: #0f172a;
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.2), 0 6px 20px rgba(15, 23, 42, 0.4);
    animation: pulse-active 2s ease-in-out infinite;
}

/* 快速标注模式下的工具栏动画 */
@keyframes quick-mode-pulse {
    0%, 100% {
        box-shadow: 0 4px 16px rgba(15, 23, 42, 0.3), 0 0 0 2px rgba(15, 23, 42, 0.8);
    }
    50% {
        box-shadow: 0 6px 24px rgba(15, 23, 42, 0.4), 0 0 0 3px rgba(15, 23, 42, 1);
    }
}

/* 类别按钮样式 */
.formatting-toolbar .format-category-btn {
    padding: 6px 12px;
    border-radius: 8px;
    border: 2px solid transparent;
    background: #fff;
    color: var(--text-dark);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.formatting-toolbar .format-category-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(47, 84, 235, 0.15);
    background: rgba(47, 84, 235, 0.05);
}

.formatting-toolbar .format-category-btn.active {
    border-color: var(--primary);
    background: rgba(47, 84, 235, 0.1);
    color: var(--primary);
    box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.1);
    transform: scale(1.05);
}

@keyframes pulse-active {
    0%, 100% {
        box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.2), 0 6px 20px rgba(15, 23, 42, 0.4);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(15, 23, 42, 0.3), 0 6px 24px rgba(15, 23, 42, 0.5);
    }
}

/* 快捷键反馈动画 */
@keyframes flash-feedback {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(47, 84, 235, 0.7);
    }
    50% {
        transform: scale(1.15);
        box-shadow: 0 0 0 8px rgba(47, 84, 235, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(47, 84, 235, 0);
    }
}

.style-options .style-toggles {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 12px;
    color: var(--text-muted);
}

.style-options .style-toggle {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    user-select: none;
}

.style-options .style-toggle input[type="checkbox"] {
    width: 14px;
    height: 14px;
}

.border-style-buttons,
.emoji-buttons {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.border-style-btn,
.emoji-btn {
    background: rgba(148, 163, 184, 0.28);
    color: #f8fafc;
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 14px;
    font-weight: 500;
    border: 2px solid transparent;
    min-width: 36px;
    text-align: center;
}

.border-style-btn.active,
.emoji-btn.active {
    background: #38bdf8;
    border-color: #0ea5e9;
}

.border-style-btn:hover,
.emoji-btn:hover {
    background: rgba(148, 163, 184, 0.4);
}

.border-style-btn.active:hover,
.emoji-btn.active:hover {
    background: #0ea5e9;
}

.highlight[data-bold="true"] {
    font-weight: 700;
}

.highlight[data-strikethrough="true"] {
    text-decoration: line-through;
}

.highlight[data-border="square"] {
    border: var(--border-width, 2px) solid currentColor;
    padding: var(--border-padding-y, 3px) var(--border-padding-x, 5px);
    box-shadow: none !important;
}

.highlight[data-border="round"] {
    border: var(--border-width, 2px) solid currentColor;
    border-radius: 12px;
    padding: var(--border-padding-y, 3px) var(--border-padding-x, 6px);
    box-shadow: none !important;
}

.highlight[data-border="dashed"] {
    border: var(--border-width, 2px) dashed currentColor;
    padding: var(--border-padding-y, 3px) var(--border-padding-x, 5px);
    box-shadow: none !important;
}

.highlight[data-emoji]::before {
    content: attr(data-emoji);
    margin-right: 3px;
    font-size: 0.9em;
}

.highlight-with-note {
    position: relative;
    display: inline-block;
    vertical-align: top;
}

.highlight-note-below {
    display: block;
    font-size: 11px;
    color: #64748b;
    background: rgba(100, 116, 139, 0.1);
    padding: 2px 6px;
    margin-top: 3px;
    border-radius: 4px;
    font-style: italic;
    line-height: 1.4;
    max-width: 200px;
}

/* 悬浮提示框样式 - 优化动画 */
.highlight-tooltip {
    position: absolute;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #f8fafc;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.6;
    max-width: 320px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
    z-index: 999;
    pointer-events: none;
    opacity: 0;
    transform: translateY(8px) scale(0.95);
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    word-wrap: break-word;
    backdrop-filter: blur(8px);
}

.highlight-tooltip.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.highlight-tooltip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-bottom-color: #1e293b;
    filter: drop-shadow(0 -2px 2px rgba(0, 0, 0, 0.1));
}

.highlight-tooltip::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    pointer-events: none;
}

.highlight[data-note]:hover {
    cursor: help;
    position: relative;
}

/* 字体大小控制 */
.highlight[data-font-size="small"] { font-size: 0.9em; }
.highlight[data-font-size="medium"] { font-size: 1em; }
.highlight[data-font-size="large"] { font-size: 1.1em; }
.highlight[data-font-size="xlarge"] { font-size: 1.2em; }

/* 文本颜色独立控制 - 移除 !important 以允许内联样式覆盖 */
.highlight[data-text-color="red"]:not([style*="color"]) { color: #dc2626; }
.highlight[data-text-color="blue"]:not([style*="color"]) { color: #2563eb; }
.highlight[data-text-color="green"]:not([style*="color"]) { color: #059669; }
.highlight[data-text-color="purple"]:not([style*="color"]) { color: #7c3aed; }
.highlight[data-text-color="orange"]:not([style*="color"]) { color: #ea580c; }
.highlight[data-text-color="default"] { /* 使用category默认颜色 */ }

/* 纯划线模式（无背景）- 只在没有自定义背景色时生效 */
.highlight[data-underline-only="true"]:not([style*="background"]):not([data-color]) {
    background-color: transparent;
    border-bottom: 2px solid currentColor;
    padding-bottom: 2px;
}

/* 选项标识样式 */
.option-marker {
    display: inline-block;
    font-weight: 700;
    color: #2563eb;
    margin-right: 8px;
    min-width: 24px;
    padding: 2px 6px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 4px;
    font-size: 0.95em;
}

.option-line {
    padding-left: 8px;
    border-left: 3px solid rgba(37, 99, 235, 0.2);
    margin: 4px 0;
}

.option-line:hover {
    background: rgba(37, 99, 235, 0.05);
    border-left-color: rgba(37, 99, 235, 0.4);
}

@media (max-width: 960px) {
    .formatting-toolbar {
        flex-wrap: wrap;
        gap: 12px;
    }

    .formatting-toolbar .format-apply {
        width: 100%;
        margin-left: 0;
    }

    .style-options .style-toggles {
        flex-direction: row;
    }

    .highlight-tooltip {
        max-width: 220px;
        font-size: 12px;
    }
}

/* ========================================
   优化后的标注对话框样式 (v4.1)
   ======================================== */

/* 标注对话框主体 - 已弃用，使用formatting-toolbar替代 */
.selection-toolbar {
    display: none !important;
    position: fixed;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15) !important;
    max-width: 480px !important;
    max-height: 85vh;
    overflow-y: auto;
    z-index: 10000;
    padding: 0 !important;
    min-width: 320px;
}

.selection-toolbar.hidden {
    display: none;
}

#annotationForm {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* 表单头部 */
.form-header {
    padding: 16px;
    border-bottom: 1px solid #e5e7eb;
    background: #f9fafb;
    border-radius: 12px 12px 0 0;
}

.form-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* 表单区块 */
.form-section {
    padding: 16px;
    border-bottom: 1px solid #e5e7eb;
}

.form-section:last-of-type {
    border-bottom: none;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.section-header h4 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: #1f2937;
}

.section-hint {
    font-size: 11px;
    color: #9ca3af;
}

/* 按钮网格 */
.button-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

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

/* 类别按钮和语法按钮 */
.category-btn, .grammar-btn,
.category-buttons button, .grammar-buttons button {
    padding: 8px 12px !important;
    border: 1px solid #d1d5db !important;
    background: white !important;
    border-radius: 6px !important;
    font-size: 13px !important;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    color: #374151 !important;
}

.category-btn:hover, .grammar-btn:hover,
.category-buttons button:hover, .grammar-buttons button:hover {
    border-color: #2f54eb !important;
    background: #eff6ff !important;
}

.category-btn.active, .grammar-btn.active,
.category-buttons button.active, .grammar-buttons button.active {
    border-color: #2f54eb !important;
    background: #2f54eb !important;
    color: white !important;
}

/* 语法按钮带颜色点 */
.grammar-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* 折叠区域 */
.collapsible {
    border: none;
    padding: 0;
}

.collapsible[open] {
    background: #f9fafb;
}

.collapsible summary {
    cursor: pointer;
    list-style: none;
    padding: 16px;
    border-bottom: 1px solid #e5e7eb;
}

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

.clickable {
    user-select: none;
}

.toggle-icon {
    font-size: 12px;
    transition: transform 0.2s;
}

.collapsible[open] .toggle-icon {
    transform: rotate(180deg);
}

.section-content {
    padding: 16px;
}

/* 样式行 */
.style-row {
    margin-bottom: 16px;
}

.style-row:last-child {
    margin-bottom: 0;
}

.style-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: #6b7280;
    margin-bottom: 8px;
}

/* 颜色选择器 */
.color-palette {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.color-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.color-btn:hover {
    transform: scale(1.1);
}

.color-btn.active {
    border-color: #2f54eb;
    box-shadow: 0 0 0 2px rgba(47, 84, 235, 0.2);
}

/* 复选框组 */
.checkbox-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    cursor: pointer;
    color: #374151;
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
}

/* 按钮组 */
.button-group {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.style-btn, .emoji-btn, .border-style-btn {
    padding: 6px 12px;
    border: 1px solid #d1d5db;
    background: white;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    color: #374151;
}

.style-btn:hover, .emoji-btn:hover, .border-style-btn:hover {
    border-color: #2f54eb;
    background: #eff6ff;
}

.style-btn.active, .emoji-btn.active, .border-style-btn.active {
    border-color: #2f54eb;
    background: #2f54eb;
    color: white;
}

/* 输入组 */
.input-group {
    margin-bottom: 12px;
}

.input-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    font-weight: 500;
    color: #6b7280;
    margin-bottom: 6px;
}

.input-field,
#tagsInput,
#customCategoryInput {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 13px;
    transition: border-color 0.2s;
    color: #374151;
}

.input-field:focus,
#tagsInput:focus,
#customCategoryInput:focus {
    outline: none;
    border-color: #2f54eb;
    box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.1);
}

.textarea-field,
#noteInput {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 13px;
    resize: vertical;
    font-family: inherit;
    color: #374151;
}

.textarea-field:focus,
#noteInput:focus {
    outline: none;
    border-color: #2f54eb;
    box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.1);
}

.select-field,
#fontFamilySelect {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 13px;
    color: #374151;
    background: white;
}

.color-picker,
#customBgColor {
    width: 100%;
    height: 40px;
    border-radius: 6px;
    border: 1px solid #d1d5db;
    cursor: pointer;
}

/* AI按钮 */
.ai-btn-small {
    padding: 4px 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s;
}

.ai-btn-small:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

/* 表单底部 */
.form-footer {
    display: flex;
    gap: 12px;
    padding: 16px;
    background: #f9fafb;
    border-radius: 0 0 12px 12px;
}

/* 按钮样式 */
.btn-primary, .btn-secondary, .btn-cancel {
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    flex: 1;
    background: #2f54eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-secondary {
    background: white;
    color: #374151;
    border: 1px solid #d1d5db;
    padding: 6px 12px;
    font-size: 12px;
}

.btn-secondary:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.btn-cancel {
    background: white;
    color: #6b7280;
    border: 1px solid #d1d5db;
}

.btn-cancel:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

/* 暗黑模式适配 */
[data-theme="dark"] .selection-toolbar {
    background: #1f2937 !important;
    color: #f3f4f6;
}

[data-theme="dark"] .form-header,
[data-theme="dark"] .form-footer {
    background: #111827;
    border-color: #374151;
}

[data-theme="dark"] .form-section {
    border-color: #374151;
}

[data-theme="dark"] .section-header h4 {
    color: #f3f4f6;
}

[data-theme="dark"] .category-btn,
[data-theme="dark"] .grammar-btn,
[data-theme="dark"] .category-buttons button,
[data-theme="dark"] .grammar-buttons button,
[data-theme="dark"] .style-btn,
[data-theme="dark"] .emoji-btn,
[data-theme="dark"] .border-style-btn,
[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .btn-cancel {
    background: #374151 !important;
    color: #f3f4f6 !important;
    border-color: #4b5563 !important;
}

[data-theme="dark"] .category-btn:hover,
[data-theme="dark"] .grammar-btn:hover,
[data-theme="dark"] .category-buttons button:hover,
[data-theme="dark"] .grammar-buttons button:hover,
[data-theme="dark"] .style-btn:hover,
[data-theme="dark"] .emoji-btn:hover,
[data-theme="dark"] .border-style-btn:hover {
    background: #4b5563 !important;
    border-color: #60a5fa !important;
}

[data-theme="dark"] .category-btn.active,
[data-theme="dark"] .grammar-btn.active,
[data-theme="dark"] .category-buttons button.active,
[data-theme="dark"] .grammar-buttons button.active,
[data-theme="dark"] .style-btn.active,
[data-theme="dark"] .emoji-btn.active,
[data-theme="dark"] .border-style-btn.active {
    background: #60a5fa !important;
    border-color: #60a5fa !important;
    color: #111827 !important;
}

[data-theme="dark"] .input-field,
[data-theme="dark"] #tagsInput,
[data-theme="dark"] #customCategoryInput,
[data-theme="dark"] .textarea-field,
[data-theme="dark"] #noteInput,
[data-theme="dark"] .select-field,
[data-theme="dark"] #fontFamilySelect {
    background: #374151;
    color: #f3f4f6;
    border-color: #4b5563;
}

[data-theme="dark"] .collapsible[open] {
    background: #111827;
}

[data-theme="dark"] .checkbox-label,
[data-theme="dark"] .style-label,
[data-theme="dark"] .input-label {
    color: #d1d5db;
}

/* 颜色选择按钮 */
.color-select-btn {
    min-width: 28px;
    height: 28px;
    padding: 2px 6px;
    border: 2px solid #ddd;
    border-radius: 4px;
    background: #fff;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.color-select-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    background: #f8f9fa;
}

.color-select-btn.hidden {
    display: none;
}

.color-select-btn.active {
    border-color: var(--primary);
    background: rgba(47, 84, 235, 0.1);
}

/* 颜色选择面板 */
.color-picker-panel {
    position: fixed;
    z-index: 10002;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    padding: 12px;
    min-width: 280px;
}

.color-picker-panel.hidden {
    display: none;
}

.color-picker-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    position: relative;
}

.color-option:hover {
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    border-color: #333;
}

.color-option.selected {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.color-option.selected::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 16px;
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* 格式按钮样式 */
.format-btn {
    min-width: 32px;
    height: 32px;
    padding: 4px 8px;
    border: 2px solid transparent;
    border-radius: 6px;
    background: #fff;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.format-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    background: #f8f9fa;
}

.format-btn[aria-pressed="true"] {
    border-color: var(--primary);
    background: rgba(47, 84, 235, 0.1);
    color: var(--primary);
}

.format-btn.active {
    border-color: var(--primary);
    background: rgba(47, 84, 235, 0.1);
    color: var(--primary);
}

/* 虚线下划线样式 */
.highlight[data-dashed="true"] {
    text-decoration: underline dashed;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

/* 斜杠分割样式 */
.highlight[data-slash="true"]::before {
    content: '/';
    color: var(--text-secondary);
    font-weight: normal;
    margin-right: 2px;
    opacity: 0.6;
}

.highlight[data-slash="true"]::after {
    content: '/';
    color: var(--text-secondary);
    font-weight: normal;
    margin-left: 2px;
    opacity: 0.6;
}

/* 删除线按钮样式 - 显示删除线效果 */
#formatStrikethroughToggle {
    text-decoration: line-through;
    font-weight: bold;
}