/* ===== Excel公式生成 - 样式文件 ===== */

/* ---------- 容器布局 ---------- */
.efg-editor-container {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--bg-secondary, #f5f7fa);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color, #e8ecf0);
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    min-height: 680px;
}

/* ---------- 工具栏 ---------- */
.efg-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    padding: 10px 14px;
    background: var(--bg-primary, #ffffff);
    border-bottom: 1px solid var(--border-color, #e8ecf0);
}

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

.toolbar-group + .toolbar-group {
    margin-left: 4px;
    padding-left: 8px;
    border-left: 1px solid var(--border-color, #e0e4e8);
}

.toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border: 1px solid var(--border-color, #d0d7de);
    border-radius: 6px;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #333);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.18s, border-color 0.18s, color 0.18s, box-shadow 0.18s;
    white-space: nowrap;
    user-select: none;
}

.toolbar-btn:hover:not(:disabled) {
    background: var(--bg-hover, #f0f4f8);
    border-color: var(--primary-color, #1677ff);
    color: var(--primary-color, #1677ff);
    box-shadow: 0 1px 4px rgba(22,119,255,0.10);
}

.toolbar-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.toolbar-btn kbd {
    display: inline-block;
    padding: 1px 5px;
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    font-family: inherit;
    font-size: 11px;
    background: var(--bg-secondary, #f5f7fa);
    color: var(--text-secondary, #666);
    line-height: 1.5;
}

.primary-toolbar-btn {
    background: var(--primary-color, #1677ff);
    color: #fff;
    border-color: var(--primary-color, #1677ff);
    font-weight: 600;
}

.primary-toolbar-btn:hover:not(:disabled) {
    background: #0e5fd8;
    border-color: #0e5fd8;
    color: #fff;
}

.primary-toolbar-btn kbd {
    border-color: rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.15);
    color: #fff;
}

.cancel-toolbar-btn {
    background: #fff1f0;
    color: #cf1322;
    border-color: #ffa39e;
}

.cancel-toolbar-btn:hover:not(:disabled) {
    background: #ffd5d2;
    border-color: #cf1322;
    color: #cf1322;
}

/* ---------- 主内容三栏 ---------- */
.efg-main-content {
    display: grid;
    grid-template-columns: 220px 1fr 1.4fr;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ---------- 左侧历史面板 ---------- */
.efg-history-panel {
    background: var(--bg-primary, #ffffff);
    border-right: 1px solid var(--border-color, #e8ecf0);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 12px 8px;
    border-bottom: 1px solid var(--border-color, #f0f2f5);
}

.history-header h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #333);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.history-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 9px;
    background: var(--primary-color, #1677ff);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
}

.history-clear-btn {
    padding: 3px 8px;
    border: 1px solid var(--border-color, #d0d7de);
    border-radius: 4px;
    background: transparent;
    color: var(--text-secondary, #888);
    font-size: 11px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.history-clear-btn:hover {
    background: #fff1f0;
    color: #cf1322;
    border-color: #ffa39e;
}

.history-search {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color, #f0f2f5);
}

.history-search input {
    width: 100%;
    padding: 5px 8px;
    border: 1px solid var(--border-color, #d0d7de);
    border-radius: 5px;
    font-size: 12px;
    background: var(--bg-secondary, #f5f7fa);
    color: var(--text-primary, #333);
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.15s;
}

.history-search input:focus {
    border-color: var(--primary-color, #1677ff);
    background: var(--bg-primary, #fff);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 6px 0;
}

.history-list::-webkit-scrollbar { width: 4px; }
.history-list::-webkit-scrollbar-thumb { background: #d0d7de; border-radius: 2px; }

.history-item {
    padding: 9px 12px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color, #f5f7fa);
    transition: background 0.15s;
}

.history-item:hover {
    background: var(--bg-hover, #f0f4f8);
}

.history-item.active {
    background: #e8f0fe;
    border-left: 3px solid var(--primary-color, #1677ff);
    padding-left: 9px; /* 补偿 border-left 3px 造成的内容偏移 */
}

/* 历史条目头部：标题+删除按鈕 */
.history-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
    margin-bottom: 3px;
}

.history-item-title {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-primary, #333);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

.history-item-del {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border: none;
    background: transparent;
    color: var(--text-secondary, #ccc);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s, color 0.15s;
    padding: 0;
}

.history-item:hover .history-item-del {
    opacity: 1;
}

.history-item-del:hover {
    background: #fff1f0;
    color: #cf1322 !important;
}

/* 分类小标签 */
.history-item-category {
    display: inline-block;
    padding: 1px 6px;
    background: rgba(22,119,255,0.08);
    border-radius: 3px;
    font-size: 10px;
    color: var(--primary-color, #1677ff);
    margin-bottom: 3px;
    border: 1px solid rgba(22,119,255,0.15);
}

.history-item-meta {
    font-size: 11px;
    color: var(--text-secondary, #999);
    display: flex;
    align-items: center;
    gap: 6px;
}

.history-item-formula {
    font-size: 11px;
    color: var(--primary-color, #1677ff);
    font-family: 'Courier New', monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 3px;
}

.history-empty {
    padding: 30px 12px;
    text-align: center;
    color: var(--text-secondary, #aaa);
    font-size: 12px;
}

/* ---------- 中间输入面板 ---------- */
.input-panel {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color, #e8ecf0);
    background: var(--bg-primary, #ffffff);
    overflow: hidden;
}

.input-panel-header {
    padding: 12px 16px 8px;
    border-bottom: 1px solid var(--border-color, #f0f2f5);
}

.input-panel-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #333);
    margin: 0;
}

.input-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.input-panel-body::-webkit-scrollbar { width: 4px; }
.input-panel-body::-webkit-scrollbar-thumb { background: #d0d7de; border-radius: 2px; }

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary, #444);
}

.form-group label .required {
    color: #e53e3e;
    margin-left: 2px;
}

.form-group label .optional {
    font-size: 11px;
    color: var(--text-secondary, #999);
    font-weight: 400;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-group.half { min-width: 0; }

.form-group textarea,
.form-group input[type="text"],
.form-group select {
    padding: 8px 10px;
    border: 1px solid var(--border-color, #d0d7de);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-primary, #333);
    background: var(--bg-primary, #fff);
    transition: border-color 0.18s, box-shadow 0.18s;
    outline: none;
    font-family: inherit;
    resize: none;
}

.form-group textarea:focus,
.form-group input[type="text"]:focus,
.form-group select:focus {
    border-color: var(--primary-color, #1677ff);
    box-shadow: 0 0 0 3px rgba(22,119,255,0.08);
}

.form-group textarea::placeholder,
.form-group input::placeholder {
    color: var(--text-placeholder, #bbb);
    font-size: 12px;
}

.form-group select {
    cursor: pointer;
    appearance: auto;
}

.char-count {
    font-size: 11px;
    color: var(--text-secondary, #bbb);
    text-align: right;
    margin-top: 2px;
    transition: color 0.2s;
}

.char-count.warn { color: #e6a817; }
.char-count.danger { color: #e53e3e; font-weight: 600; }

/* 抖动动画 */
@keyframes inputErrorShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.input-error-shake {
    animation: inputErrorShake 0.4s ease;
    border-color: #e53e3e !important;
}

/* 生成主按钮 */
.form-actions {
    margin-top: 4px;
}

.generate-main-btn {
    width: 100%;
    padding: 12px 16px;
    background: linear-gradient(135deg, #1677ff, #0e5fd8);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.15s, box-shadow 0.15s, background 0.18s;
    box-shadow: 0 2px 8px rgba(22,119,255,0.30);
}

.generate-main-btn:hover {
    background: linear-gradient(135deg, #0e5fd8, #0a4fc0);
    box-shadow: 0 4px 16px rgba(22,119,255,0.40);
    transform: translateY(-1px);
}

.generate-main-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(22,119,255,0.25);
}

.generate-main-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: 0 2px 4px rgba(22,119,255,0.15) !important;
}

.generate-main-btn .btn-icon { font-size: 18px; }
.generate-main-btn .btn-shortcut {
    font-size: 11px;
    opacity: 0.75;
    display: flex;
    gap: 2px;
    align-items: center;
}

.generate-main-btn kbd {
    padding: 1px 5px;
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.35);
    border-radius: 3px;
    font-size: 10px;
}

/* AI生成状态 */
.ai-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: linear-gradient(90deg, #e8f4ff, #f0f8ff);
    border: 1px solid #91caff;
    border-radius: 8px;
    gap: 10px;
}

.ai-loading {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.loading-dots {
    display: flex;
    gap: 4px;
}

.loading-dots span {
    display: inline-block;
    width: 7px;
    height: 7px;
    background: var(--primary-color, #1677ff);
    border-radius: 50%;
    animation: dotBounce 1.2s infinite ease-in-out;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotBounce {
    0%, 80%, 100% { transform: scale(0.75); opacity: 0.5; }
    40% { transform: scale(1.1); opacity: 1; }
}

#aiStatusText {
    font-size: 13px;
    color: var(--primary-color, #1677ff);
}

.cancel-mini-btn {
    padding: 4px 10px;
    background: #fff1f0;
    border: 1px solid #ffa39e;
    border-radius: 5px;
    color: #cf1322;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    white-space: nowrap;
}

.cancel-mini-btn:hover {
    background: #ffd5d2;
    border-color: #cf1322;
}

/* ---------- 右侧预览面板 ---------- */
.preview-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary, #f8fafc);
    overflow: hidden;
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px 8px;
    border-bottom: 1px solid var(--border-color, #e8ecf0);
    background: var(--bg-primary, #fff);
}

.preview-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #333);
    margin: 0;
}

.preview-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-copy-btn {
    padding: 4px 12px;
    border: 1px solid var(--primary-color, #1677ff);
    border-radius: 5px;
    background: transparent;
    color: var(--primary-color, #1677ff);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.preview-copy-btn:hover {
    background: var(--primary-color, #1677ff);
    color: #fff;
}

.preview-copy-btn.copy-success-flash {
    background: #52c41a;
    border-color: #52c41a;
    color: #fff;
    transition: background 0.1s, color 0.1s;
}

.preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.preview-content::-webkit-scrollbar { width: 5px; }
.preview-content::-webkit-scrollbar-thumb { background: #d0d7de; border-radius: 3px; }

/* 空状态 */
.preview-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: 300px;
    color: var(--text-secondary, #aaa);
    text-align: center;
    gap: 8px;
}

.preview-empty-icon {
    font-size: 52px;
    opacity: 0.5;
    animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.preview-empty p {
    font-size: 14px;
    margin: 0;
}

.preview-empty-sub {
    font-size: 12px !important;
    opacity: 0.7;
}

/* 骨架屏 */
.preview-skeleton {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skeleton-formula {
    background: var(--bg-primary, #fff);
    border-radius: 8px;
    padding: 14px;
    border: 1px solid var(--border-color, #e8ecf0);
}

.skeleton-label {
    font-size: 12px;
    color: var(--primary-color, #1677ff);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 骨架屏 ✨ 图标弹跳动画 */
.skeleton-label::before {
    content: '✨';
    display: inline-block;
    animation: skeletonIconBounce 0.8s ease-in-out infinite alternate;
}

@keyframes skeletonIconBounce {
    0%   { transform: translateY(0); }
    100% { transform: translateY(-4px); }
}

.skeleton-section {
    background: var(--bg-primary, #fff);
    border-radius: 8px;
    padding: 12px;
    border: 1px solid var(--border-color, #e8ecf0);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skeleton-bar {
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(90deg, #f0f2f5 25%, #e8ecf0 50%, #f0f2f5 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.skeleton-bar-sm { width: 40%; }
.skeleton-bar-md { width: 70%; }
.skeleton-bar-lg { width: 100%; height: 28px; border-radius: 6px; }

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 公式结果区域 */
.formula-result {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* 主公式卡片 */
.formula-main-card {
    background: linear-gradient(135deg, #1677ff0d, #0e5fd808);
    border: 1.5px solid var(--primary-color, #1677ff);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(22,119,255,0.10);
    transition: box-shadow 0.2s;
}

.formula-main-card:hover {
    box-shadow: 0 4px 16px rgba(22,119,255,0.18);
}

.formula-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 14px;
    background: rgba(22,119,255,0.06);
    border-bottom: 1px solid rgba(22,119,255,0.15);
}

.formula-badge {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color, #1677ff);
    display: flex;
    align-items: center;
    gap: 5px;
}

.formula-copy-btn {
    padding: 3px 10px;
    border: 1px solid var(--primary-color, #1677ff);
    border-radius: 5px;
    background: transparent;
    color: var(--primary-color, #1677ff);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.formula-copy-btn:hover {
    background: var(--primary-color, #1677ff);
    color: #fff;
}

.formula-copy-btn.copy-success-flash {
    background: #52c41a;
    border-color: #52c41a;
    color: #fff;
}

.formula-code {
    padding: 14px;
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 15px;
    font-weight: 700;
    color: var(--primary-color, #1677ff);
    word-break: break-all;
    overflow-x: auto;
    line-height: 1.6;
    letter-spacing: 0.3px;
    user-select: all;
    cursor: text;
    background: var(--bg-primary, #fff);
}

/* 结果区块 */
.result-section {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-color, #e8ecf0);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: box-shadow 0.2s;
}

.result-section:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    background: var(--bg-secondary, #f8fafc);
    border-bottom: 1px solid var(--border-color, #f0f2f5);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #444);
}

.section-icon {
    font-size: 16px;
}

.section-content {
    padding: 12px 14px;
}

/* 功能说明 */
.explanation-content {
    font-size: 13px;
    color: var(--text-primary, #555);
    line-height: 1.7;
}

/* 公式拆解列表 */
.breakdown-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.breakdown-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 7px 0;
    border-bottom: 1px dashed var(--border-color, #f0f2f5);
}

.breakdown-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.breakdown-part {
    flex-shrink: 0;
    padding: 2px 8px;
    background: #e8f0fe;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-color, #1677ff);
    white-space: nowrap;
    border: 1px solid rgba(22,119,255,0.2);
}

.breakdown-desc {
    font-size: 12px;
    color: var(--text-secondary, #666);
    line-height: 1.5;
    flex: 1;
}

/* 使用示例 */
.examples-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.example-item {
    background: var(--bg-secondary, #f8fafc);
    border: 1px solid var(--border-color, #e8ecf0);
    border-radius: 7px;
    overflow: hidden;
    transition: box-shadow 0.15s;
}

.example-item:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.example-scenario {
    padding: 7px 12px;
    font-size: 12px;
    color: var(--text-secondary, #777);
    border-bottom: 1px solid var(--border-color, #f0f2f5);
    background: var(--bg-secondary, #f0f4f8);
}

.example-formula-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    gap: 8px;
}

.example-formula-code {
    font-family: 'Courier New', monospace;
    font-size: 13px;
    color: var(--primary-color, #1677ff);
    font-weight: 600;
    flex: 1;
    word-break: break-all;
}

.example-copy-btn {
    flex-shrink: 0;
    padding: 3px 8px;
    border: 1px solid var(--border-color, #d0d7de);
    border-radius: 4px;
    background: var(--bg-primary, #fff);
    color: var(--text-secondary, #888);
    font-size: 11px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.example-copy-btn:hover {
    background: var(--primary-color, #1677ff);
    color: #fff;
    border-color: var(--primary-color, #1677ff);
}

.example-copy-btn.copy-success-flash {
    background: #52c41a;
    border-color: #52c41a;
    color: #fff;
}

/* 注意事项 */
.tips-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.tips-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary, #666);
    line-height: 1.6;
}

.tips-list li::before {
    content: '⚡';
    flex-shrink: 0;
    margin-top: 1px;
}

/* ---------- 提示栏 ---------- */
.efg-hint-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 8px 16px;
    background: var(--bg-primary, #fff);
    border-top: 1px solid var(--border-color, #e8ecf0);
    font-size: 12px;
    color: var(--text-secondary, #888);
}

.efg-hint-bar kbd {
    padding: 1px 5px;
    border: 1px solid var(--border-color, #ccc);
    border-radius: 3px;
    background: var(--bg-secondary, #f5f7fa);
    font-size: 11px;
}

.hint-sep {
    color: var(--border-color, #ccc);
}

/* ---------- 弹窗 Modal ---------- */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 9000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-primary, #fff);
    border-radius: 12px;
    width: 90%;
    max-width: 760px;
    max-height: 82vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 16px 48px rgba(0,0,0,0.20);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color, #e8ecf0);
}

.modal-header h3 {
    font-size: 15px;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary, #333);
}

.modal-close {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--bg-secondary, #f5f7fa);
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary, #888);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.modal-close:hover {
    background: #fff1f0;
    color: #cf1322;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
}

.modal-body::-webkit-scrollbar { width: 5px; }
.modal-body::-webkit-scrollbar-thumb { background: #d0d7de; border-radius: 3px; }

/* 弹窗分类标签 */
.modal-category-tabs {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.category-tab {
    padding: 5px 12px;
    border: 1px solid var(--border-color, #d0d7de);
    border-radius: 20px;
    background: var(--bg-secondary, #f5f7fa);
    color: var(--text-secondary, #666);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.category-tab.active,
.category-tab:hover {
    background: var(--primary-color, #1677ff);
    border-color: var(--primary-color, #1677ff);
    color: #fff;
}

/* 示例网格 */
.example-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.example-card {
    padding: 12px 14px;
    border: 1px solid var(--border-color, #e8ecf0);
    border-radius: 8px;
    cursor: pointer;
    background: var(--bg-primary, #fff);
    transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.example-card:hover {
    border-color: var(--primary-color, #1677ff);
    background: #f0f6ff;
    box-shadow: 0 2px 8px rgba(22,119,255,0.12);
    transform: translateY(-2px);
}

.example-card-icon {
    font-size: 22px;
    margin-bottom: 7px;
}

.example-card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #333);
    margin-bottom: 4px;
}

.example-card-desc {
    font-size: 11px;
    color: var(--text-secondary, #888);
    line-height: 1.4;
}

/* ---------- Toast提示 ---------- */
.efg-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: rgba(30,30,30,0.88);
    color: #fff;
    padding: 9px 20px;
    border-radius: 20px;
    font-size: 13px;
    z-index: 99999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s, transform 0.25s;
    white-space: nowrap;
    max-width: 360px;
}

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

.efg-toast.success { background: rgba(82,196,26,0.9); }
.efg-toast.error { background: rgba(207,19,34,0.9); }

/* ---------- 暗黑模式 ---------- */
body.dark-mode {
    --bg-primary: #1e1e2e;
    --bg-secondary: #16161e;
    --bg-hover: #2a2a3a;
    --text-primary: #e0e0f0;
    --text-secondary: #9090b0;
    --text-placeholder: #5a5a7a;
    --border-color: #3a3a55;
    --primary-color: #4d9fff;
}

body.dark-mode .efg-editor-container {
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

body.dark-mode .formula-main-card {
    background: linear-gradient(135deg, rgba(77,159,255,0.08), rgba(77,159,255,0.04));
    border-color: var(--primary-color, #4d9fff);
}

body.dark-mode .formula-card-header {
    background: rgba(77,159,255,0.07);
    border-color: rgba(77,159,255,0.18);
}

body.dark-mode .breakdown-part {
    background: rgba(77,159,255,0.12);
    border-color: rgba(77,159,255,0.2);
    color: var(--primary-color, #4d9fff);
}

body.dark-mode .ai-status {
    background: linear-gradient(90deg, rgba(77,159,255,0.10), rgba(77,159,255,0.06));
    border-color: rgba(77,159,255,0.3);
}

body.dark-mode .history-item.active {
    background: rgba(77,159,255,0.12);
    border-left-color: var(--primary-color, #4d9fff);
}

body.dark-mode .history-item-category {
    background: rgba(77,159,255,0.10);
    border-color: rgba(77,159,255,0.20);
    color: var(--primary-color, #4d9fff);
}

body.dark-mode .toolbar-btn:hover:not(:disabled) {
    background: #2a2a3a;
}

body.dark-mode .generate-main-btn {
    background: linear-gradient(135deg, #4d9fff, #2b7de0);
    box-shadow: 0 2px 8px rgba(77,159,255,0.25);
}

body.dark-mode .generate-main-btn:hover {
    background: linear-gradient(135deg, #6aafff, #3d8fe8);
    box-shadow: 0 4px 16px rgba(77,159,255,0.40);
}

body.dark-mode .skeleton-bar {
    background: linear-gradient(90deg, #2a2a3a 25%, #333355 50%, #2a2a3a 75%);
    background-size: 200% 100%;
}

body.dark-mode .example-card:hover {
    background: rgba(77,159,255,0.10);
}

body.dark-mode .example-scenario {
    background: rgba(77,159,255,0.05);
    border-color: rgba(77,159,255,0.10);
}

body.dark-mode .result-section:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.35);
}

body.dark-mode .history-item-del:hover {
    background: rgba(207,19,34,0.20) !important;
    color: #ff7875 !important;
}

body.dark-mode .formula-code {
    color: #6db5ff;
    background: rgba(77,159,255,0.06);
}

body.dark-mode .example-formula-code {
    color: #6db5ff;
}

/* 暗黑模式：红色按钮 hover 适配 */
body.dark-mode .cancel-mini-btn {
    background: rgba(207,19,34,0.12);
    border-color: rgba(207,19,34,0.35);
    color: #ff7875;
}

body.dark-mode .cancel-mini-btn:hover {
    background: rgba(207,19,34,0.22);
    border-color: #ff4d4f;
    color: #ffa39e;
}

body.dark-mode .cancel-toolbar-btn {
    background: rgba(207,19,34,0.12);
    border-color: rgba(207,19,34,0.30);
    color: #ff7875;
}

body.dark-mode .cancel-toolbar-btn:hover:not(:disabled) {
    background: rgba(207,19,34,0.22);
    border-color: #ff4d4f;
    color: #ffa39e;
}

body.dark-mode .history-clear-btn:hover {
    background: rgba(207,19,34,0.12);
    border-color: rgba(207,19,34,0.35);
    color: #ff7875;
}

body.dark-mode .modal-close:hover {
    background: rgba(207,19,34,0.12);
    color: #ff7875;
}

body.dark-mode .modal-content {
    border: 1px solid rgba(255,255,255,0.08);
}

/* ---------- 应用层全屏模式 ---------- */
.efg-editor-container.is-fullscreen {
    position: fixed;
    inset: 0;
    z-index: 999;
    border-radius: 0;
    border: none;
    min-height: 0;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.efg-editor-container.is-fullscreen .efg-main-content {
    flex: 1;
    min-height: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .efg-main-content {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }

    .efg-history-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color, #e8ecf0);
        max-height: 220px;
    }

    .input-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color, #e8ecf0);
    }

    .efg-hint-bar {
        display: none;
    }
}

@media (max-width: 640px) {
    .efg-toolbar {
        gap: 4px;
    }

    .toolbar-btn {
        padding: 5px 8px;
        font-size: 12px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .modal-content {
        max-width: 98%;
        max-height: 90vh;
    }
}