/**
 * Web-Tools 统一基础样式
 * 
 * 现代深色磨砂玻璃 UI 风格 (Glassmorphism)
 * 使用 --tb-* 前缀的 CSS 变量，各工具目录可覆盖变量自定义配色
 * 默认根据浏览器设置自动选择明暗模式
 */

/* ===== CSS 变量 ===== */
:root {
    /* 主色调 — 各工具目录可覆盖 */
    --tb-primary: #0ea5e9;
    --tb-secondary: #06b6d4;
    --tb-accent: #22d3ee;

    /* 背景 */
    --tb-bg: #0b1121;
    --tb-surface: rgba(15, 23, 42, 0.6);
    --tb-surface-hover: rgba(30, 41, 59, 0.8);
    --tb-border: rgba(255, 255, 255, 0.08);

    /* 文字 */
    --tb-text: #f8fafc;
    --tb-text-secondary: #94a3b8;
    --tb-text-muted: #5b637a;

    /* 效果 */
    --tb-glass-blur: blur(20px);
    --tb-radius: 12px;
    --tb-radius-sm: 8px;
    --tb-radius-lg: 16px;

    /* 状态色 */
    --tb-success: #10b981;
    --tb-warning: #f59e0b;
    --tb-error: #ef4444;
    --tb-info: #6bb5ff;

    /* 字体 */
    --tb-font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;
    --tb-font-sans: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;

    /* 布局尺寸 */
    --tb-sidebar-width: 260px;
    --tb-topbar-height: 70px;

    /* 动画 */
    --tb-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Light Mode 覆盖 ===== */
body.light-mode {
    --tb-bg: #f5f7fa;
    --tb-surface: rgba(255, 255, 255, 0.7);
    --tb-surface-hover: rgba(230, 230, 230, 0.9);
    --tb-border: rgba(0, 0, 0, 0.08);
    --tb-text: #1a1a2e;
    --tb-text-secondary: #4a5568;
    --tb-text-muted: #718096;
}

/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--tb-font-sans);
}

body {
    background-color: var(--tb-bg);
    color: var(--tb-text);
    min-height: 100vh;
    display: flex;
    overflow: hidden;
    position: relative;
}

/* ===== 动态背景特效 ===== */
.bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    filter: blur(90px);
    opacity: 0.35;
    border-radius: 50%;
    animation: float 25s infinite ease-in-out alternate;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: var(--tb-primary);
    animation-delay: 0s;
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: var(--tb-secondary);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 40%;
    width: 40vw;
    height: 40vw;
    background: var(--tb-accent);
    opacity: 0.15;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -60px) scale(1.1); }
    100% { transform: translate(-20px, 30px) scale(0.9); }
}

/* ===== 玻璃卡片 ===== */
.glass-card {
    background: var(--tb-surface);
    backdrop-filter: var(--tb-glass-blur);
    -webkit-backdrop-filter: var(--tb-glass-blur);
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

/* ===== 左侧边栏 (Sidebar) ===== */
.sidebar {
    width: var(--tb-sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: rgba(10, 15, 30, 0.7);
    backdrop-filter: var(--tb-glass-blur);
    border-right: 1px solid var(--tb-border);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
    flex-shrink: 0;
}

body.light-mode .sidebar {
    background: rgba(255, 255, 255, 0.85);
}

.sidebar-header {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid var(--tb-border);
}

.sidebar-header .logo {
    font-size: 1.2rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--tb-accent), #fff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
}

body.light-mode .sidebar-header .logo {
    background: linear-gradient(to right, var(--tb-primary), #333);
    -webkit-background-clip: text;
    background-clip: text;
}

.sidebar-header .logo i {
    color: var(--tb-accent);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--tb-text);
    font-size: 1.2rem;
    cursor: pointer;
}

.nav-menu {
    flex: 1;
    overflow-y: auto;
    padding: 24px 16px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    color: var(--tb-text-secondary);
    text-decoration: none;
    border-radius: var(--tb-radius);
    transition: var(--tb-transition);
    font-weight: 500;
    margin-bottom: 6px;
    cursor: pointer;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-item:hover {
    background: var(--tb-surface-hover);
    color: var(--tb-text);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(6, 182, 212, 0.15));
    color: var(--tb-accent);
    border: 1px solid rgba(34, 211, 238, 0.15);
}

.nav-item small {
    display: block;
    font-size: 0.75rem;
    color: var(--tb-text-muted);
    margin-top: 2px;
}

.nav-section-title {
    margin: 20px 0 10px 16px;
    font-size: 0.8rem;
    color: var(--tb-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.sidebar-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--tb-border);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--tb-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.95rem;
}

.sidebar-footer a:hover {
    color: var(--tb-text);
}

/* ===== 主工作区 ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.top-bar {
    height: var(--tb-topbar-height);
    display: flex;
    align-items: center;
    padding: 0 32px;
    gap: 20px;
    flex-shrink: 0;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--tb-text);
    font-size: 1.2rem;
    cursor: pointer;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    flex: 1;
}

.module-container {
    flex: 1;
    overflow-y: auto;
    padding: 10px 32px 40px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.module-container::-webkit-scrollbar {
    width: 8px;
}

.module-container::-webkit-scrollbar-track {
    background: transparent;
}

.module-container::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

body.light-mode .module-container::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.15);
}

.module-panel {
    display: none;
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.module-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 仪表盘 (Dashboard) ===== */
.dashboard-hero {
    padding: 40px;
    margin-bottom: 30px;
    text-align: center;
}

.dashboard-hero h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    background: linear-gradient(to right, #fff, var(--tb-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

body.light-mode .dashboard-hero h2 {
    background: linear-gradient(to right, #333, var(--tb-primary));
    -webkit-background-clip: text;
    background-clip: text;
}

.dashboard-hero p {
    color: var(--tb-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.tools-grid, .tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.tool-card {
    display: flex;
    flex-direction: column;
    padding: 28px 24px;
    gap: 16px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.tool-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(34, 211, 238, 0.3);
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card .icon {
    font-size: 2.2rem;
    color: var(--tb-accent);
    margin-bottom: 8px;
    display: inline-flex;
    padding: 12px;
    border-radius: var(--tb-radius);
    background: rgba(34, 211, 238, 0.1);
    width: max-content;
}

.tool-card h3 {
    font-size: 1.2rem;
    color: var(--tb-text);
    font-weight: 600;
}

.tool-card p {
    font-size: 0.95rem;
    color: var(--tb-text-secondary);
    line-height: 1.5;
    flex: 1;
}

/* ===== 通用工具面板布局 ===== */
.tool-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.tool-main {
    padding: 32px;
}

.tool-main h3 {
    font-size: 1.1rem;
    color: var(--tb-accent);
    margin-bottom: 20px;
    font-weight: 600;
}

.tool-main h4 {
    font-size: 0.95rem;
    color: var(--tb-text-secondary);
    margin-bottom: 12px;
    font-weight: 500;
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--tb-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--tb-radius-sm);
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--tb-border);
    color: var(--tb-text);
    font-size: 1rem;
    outline: none;
    transition: var(--tb-transition);
}

body.light-mode .form-control {
    background: rgba(255, 255, 255, 0.8);
}

.form-control:focus {
    border-color: var(--tb-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
    background: rgba(15, 23, 42, 0.8);
}

textarea.form-control {
    font-family: var(--tb-font-mono);
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

select.form-control {
    cursor: pointer;
}

.form-control-sm {
    padding: 8px 12px;
    font-size: 0.9rem;
}

.form-row {
    display: flex;
    gap: 16px;
    align-items: end;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 150px;
    margin-bottom: 0;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--tb-radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--tb-transition);
    color: #fff;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: linear-gradient(135deg, var(--tb-primary), var(--tb-secondary));
}

.btn-primary:hover {
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #059669, #10b981);
}

.btn-success:hover {
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, #d97706, #f59e0b);
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626, #ef4444);
}

.btn-info {
    background: linear-gradient(135deg, #0ea5e9, #38bdf8);
}

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

.btn-outline:hover {
    background: var(--tb-surface-hover);
    color: var(--tb-text);
    border-color: var(--tb-primary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

/* ===== 选项卡 (Tab Bar) ===== */
.tab-bar {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 10px;
    padding: 4px;
    border: 1px solid var(--tb-border);
    flex-wrap: wrap;
}

body.light-mode .tab-bar {
    background: rgba(0, 0, 0, 0.05);
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--tb-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
    color: var(--tb-text-secondary);
    transition: var(--tb-transition);
    flex: 1;
    min-width: fit-content;
    text-align: center;
}

.tab-btn:hover {
    color: var(--tb-text);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    background: rgba(14, 165, 233, 0.2);
    color: var(--tb-accent);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.15);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

/* ===== 结果展示 ===== */
.result-box {
    background: rgba(34, 211, 238, 0.05);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: var(--tb-radius);
    padding: 20px;
    text-align: center;
    margin-top: 20px;
}

.result-box .label {
    font-size: 0.85rem;
    color: var(--tb-text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-box .value {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--tb-accent), #fff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.result-box .value-sm {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--tb-accent);
    word-break: break-all;
}

/* ===== 代码/文本输出区域 ===== */
.output-area {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-sm);
    padding: 16px;
    font-family: var(--tb-font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 60px;
    max-height: 400px;
    overflow-y: auto;
    color: var(--tb-text);
    margin-top: 12px;
}

.output-area .error-text { color: var(--tb-error); }
.output-area .success-text { color: var(--tb-success); }
.output-area .info-text { color: var(--tb-text-secondary); }

/* ===== 状态徽章 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--tb-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--tb-error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-info {
    background: rgba(14, 165, 233, 0.15);
    color: var(--tb-primary);
    border: 1px solid rgba(14, 165, 233, 0.3);
}

/* ===== 双面板布局 ===== */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.split-layout .panel {
    min-height: 200px;
}

/* ===== Diff 样式 ===== */
.diff-output {
    font-family: var(--tb-font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
}

.diff-added {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
    display: block;
    padding: 1px 8px;
}

.diff-removed {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    display: block;
    padding: 1px 8px;
}

.diff-unchanged {
    display: block;
    padding: 1px 8px;
    color: var(--tb-text-secondary);
}

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.stat-card {
    text-align: center;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--tb-radius-sm);
    border: 1px solid var(--tb-border);
}

body.light-mode .stat-card {
    background: rgba(255, 255, 255, 0.5);
}

.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--tb-accent);
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--tb-text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Hash 输出列表 ===== */
.hash-list {
    display: grid;
    gap: 12px;
}

.hash-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--tb-radius-sm);
    border: 1px solid var(--tb-border);
}

.hash-item .hash-label {
    font-size: 0.85rem;
    color: var(--tb-text-secondary);
    min-width: 80px;
    font-weight: 600;
    text-transform: uppercase;
}

.hash-item .hash-value {
    font-family: var(--tb-font-mono);
    font-size: 0.85rem;
    color: var(--tb-accent);
    word-break: break-all;
    flex: 1;
}

.hash-item .copy-btn {
    background: none;
    border: none;
    color: var(--tb-text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--tb-transition);
}

.hash-item .copy-btn:hover {
    color: var(--tb-accent);
    background: rgba(34, 211, 238, 0.1);
}

/* ===== UUID 展示 ===== */
.uuid-display {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--tb-radius-sm);
    border: 1px solid var(--tb-border);
    margin-bottom: 12px;
}

.uuid-display .uuid-text {
    font-family: var(--tb-font-mono);
    font-size: 1.1rem;
    color: var(--tb-accent);
    flex: 1;
    word-break: break-all;
}

/* ===== 密码强度指示器 ===== */
.strength-bar {
    height: 6px;
    border-radius: 3px;
    margin-top: 8px;
    transition: all 0.3s;
    background: var(--tb-border);
}

.strength-bar.weak { background: var(--tb-error); width: 25%; }
.strength-bar.medium { background: var(--tb-warning); width: 50%; }
.strength-bar.strong { background: var(--tb-success); width: 75%; }
.strength-bar.very-strong { background: linear-gradient(to right, var(--tb-success), #34d399); width: 100%; }

/* ===== 颜色预览 ===== */
.color-preview {
    width: 100%;
    height: 60px;
    border-radius: var(--tb-radius-sm);
    border: 1px solid var(--tb-border);
    margin-top: 12px;
    transition: background 0.3s;
}

/* ===== QR Code ===== */
.qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 24px;
}

.qr-container canvas, .qr-container img {
    border-radius: var(--tb-radius);
    padding: 16px;
    background: #fff;
}

/* ===== Checkbox 组 ===== */
.checkbox-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--tb-text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
}

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

/* ===== Toast 通知 ===== */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 24px;
    border-radius: var(--tb-radius);
    background: var(--tb-surface);
    backdrop-filter: var(--tb-glass-blur);
    border: 1px solid var(--tb-border);
    color: var(--tb-text);
    font-size: 0.9rem;
    z-index: 1000;
    animation: slideUp 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.toast-success { border-color: var(--tb-success); }
.toast-error { border-color: var(--tb-error); }
.toast-warning { border-color: var(--tb-warning); }
.toast-info { border-color: var(--tb-primary); }

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

/* ===== Markdown Preview ===== */
.markdown-preview {
    padding: 20px;
    line-height: 1.8;
    min-height: 300px;
    max-height: 600px;
    overflow-y: auto;
}

.markdown-preview h1, .markdown-preview h2, .markdown-preview h3 {
    margin-top: 1em;
    margin-bottom: 0.5em;
    color: var(--tb-text);
}

.markdown-preview h1 { font-size: 1.8rem; }
.markdown-preview h2 { font-size: 1.4rem; }
.markdown-preview h3 { font-size: 1.2rem; }

.markdown-preview p {
    margin-bottom: 1em;
    color: var(--tb-text-secondary);
}

.markdown-preview code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--tb-font-mono);
    font-size: 0.85rem;
}

.markdown-preview pre {
    background: rgba(0, 0, 0, 0.4);
    padding: 16px;
    border-radius: var(--tb-radius-sm);
    overflow-x: auto;
    margin-bottom: 1em;
}

.markdown-preview pre code {
    background: none;
    padding: 0;
}

.markdown-preview blockquote {
    border-left: 3px solid var(--tb-primary);
    padding-left: 16px;
    color: var(--tb-text-secondary);
    margin-bottom: 1em;
}

.markdown-preview ul, .markdown-preview ol {
    margin-bottom: 1em;
    padding-left: 24px;
    color: var(--tb-text-secondary);
}

.markdown-preview a {
    color: var(--tb-accent);
    text-decoration: none;
}

.markdown-preview a:hover {
    text-decoration: underline;
}

.markdown-preview img {
    max-width: 100%;
    border-radius: var(--tb-radius-sm);
}

.markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}

.markdown-preview th, .markdown-preview td {
    padding: 8px 12px;
    border: 1px solid var(--tb-border);
    text-align: left;
}

.markdown-preview th {
    background: rgba(0, 0, 0, 0.2);
    font-weight: 600;
}

/* ===== Regex Highlight ===== */
.regex-highlight {
    font-family: var(--tb-font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    padding: 16px;
    white-space: pre-wrap;
    word-break: break-all;
}

.regex-match {
    background: rgba(16, 185, 129, 0.3);
    border-radius: 2px;
    padding: 0 2px;
}

.regex-match.active {
    background: rgba(16, 185, 129, 0.5);
    outline: 1px solid var(--tb-success);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .split-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        transform: translateX(-100%);
        width: 280px;
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-menu-btn {
        display: block;
    }

    .mobile-toggle {
        display: block;
    }

    .top-bar {
        padding: 0 24px;
    }

    .module-container {
        padding: 10px 24px;
    }

    .tools-grid, .tool-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .hash-item .hash-label {
        min-width: 60px;
    }
}