:root {
    --primary: #6366f1; /* 主色调：靛蓝色 */
    --primary-dark: #4f46e5; /* 深色主色调 */
    --secondary: #8b5cf6; /* 辅助色：紫色 */
    --accent: #f59e0b; /* 强调色：琥珀色 */
    --bg: #f9fafb; /* 背景色 */
    --card: #ffffff; /* 卡片背景 */
    --text: #111827; /* 文本颜色 */
    --text-secondary: #4b5563; /* 次要文本 */
    --text-tertiary: #6b7280; /* 第三文本 */
    --border: #e5e7eb; /* 边框颜色 */
    --radius: 12px; /* 圆角半径 */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03); /* 阴影 */
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03); /* 悬停阴影 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); /* 过渡效果 */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", "Noto Sans SC", "PingFang SC", sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 排版 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.75rem;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 头部 */
header {
    position: relative;
    margin-bottom: 2rem;
    padding: 2rem 0;
    background: linear-gradient(135deg, #5b21b6 0%, #4c1d95 100%);
    color: white;
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.15);
    overflow: visible;
}

/* 装饰元素 */
header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    transform: translate(40%, -40%);
    z-index: 1;
}

header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
    transform: translate(-30%, 30%);
    z-index: 1;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 2;
    width: 100%;
}

.site-title {
    flex: 1;
    padding-right: 1.5rem;
}

/* 用户菜单样式已迁移到user-menu.css */

/* 响应式调整 */
@media (max-width: 768px) {
    header {
        padding: 1rem 1rem;
        position: relative;
    }
    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
    }
    .site-title {
        padding-right: 1rem;
    }
    .site-title h1 {
        font-size: 1.75rem;
    }
    .subtitle {
        font-size: 0.9rem;
    }
    .mobile-hidden {
        display: none;
    }
}

header h1 {
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
    font-weight: 800;
    text-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
    line-height: 1.6;
}

.user-menu span {
    font-weight: 500;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
    border-radius: var(--radius) var(--radius) 0 0;
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.05), 0 -2px 4px -1px rgba(0, 0, 0, 0.03);
    font-size: 0.9rem;
}

/* 移动端响应式调整 */
@media (max-width: 768px) {
    footer {
        padding: 1rem 0.75rem;
        font-size: 0.85rem;
    }
}

footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    word-break: break-word;
}

footer a:hover {
    color: white;
    text-decoration: underline;
}

/* 按钮 */
.btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px -2px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #6d28d9 0%, #5b21b6 100%);
}

.btn-logout {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.2);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: #f3f4f6;
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: #e5e7eb;
    transform: translateY(-1px);
}

.btn-accent {
    background: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: #d97706;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-danger {
    background: #ef4444;
    color: #fff;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
}

/* 卡片 */
.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
    border-color: #e5e7eb;
}

.card-header {
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    margin-bottom: 0.5rem;
    color: var(--text);
}

/* 表单 */
.form-group {
    margin-bottom: 1.5rem;
}

/* 移动端表单间距优化 */
@media (max-width: 768px) {
    .form-group {
        margin-bottom: 1rem;
    }
    .form-control {
        padding: 0.6rem;
        font-size: 0.95rem;
    }
    label {
        font-size: 0.95rem;
        margin-bottom: 0.3rem;
    }
    .form-text {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .form-group {
        margin-bottom: 0.75rem;
    }
    .form-control {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    label {
        font-size: 0.9rem;
    }
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

input[type=text], textarea, select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    font-size: 1rem;
    background: var(--card);
    color: var(--text);
}

input[type=text]:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

textarea {
    min-height: 160px;
    resize: vertical;
    line-height: 1.6;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

input[type=checkbox] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary);
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* 表格 */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

th {
    background: #f9fafb;
    font-weight: 600;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
    z-index: 5;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background: #f9fafb;
    transform: translateX(2px);
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* 标签页 */
.tab-navigation {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-tertiary);
    position: relative;
}

.tab-btn.active {
    color: var(--primary);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -0.6rem;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
}

.tab-btn:hover:not(.active) {
    background: #f3f4f6;
    color: var(--text-secondary);
}

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

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

/* 进度条 */
.progress {
    height: 0.75rem;
    background-color: #f3f4f6;
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary);
    background-image: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
    border-radius: 9999px;
}

/* 日志容器 */
.log-container {
    max-height: 300px;
    overflow-y: auto;
    background-color: #f9fafb;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.log-entry {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.log-entry:last-child {
    border-bottom: none;
}

.log-success {
    color: #10b981;
}

.log-error {
    color: #ef4444;
}

.log-info {
    color: var(--primary);
}

/* 状态消息 */
.status-message {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.status-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border-left: 4px solid #10b981;
}

.status-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-left: 4px solid #ef4444;
}

.status-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border-left: 4px solid #3b82f6;
}

/* 结果容器 */
.result-container {
    margin-top: 1.5rem;
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    display: none;
    border: 1px solid var(--border);
}

.result-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.result-title {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 600;
}

.result-content {
    min-height: 300px;
    line-height: 1.7;
    white-space: pre-wrap;
    color: var(--text);
}

.length-info {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
    text-align: right;
}

/* 加载动画 */
.loading {
    width: 1.25rem;
    height: 1.25rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    display: inline-block;
}

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

/* 淡入动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 补充管理员面板样式 */
.dashboard-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.stat-card {
    flex: 1;
    min-width: 200px;
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    text-align: center;
}

.stat-card h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0;
}

.nav-menu {
    margin-bottom: 2rem;
}

.nav-menu ul {
    list-style: none;
    padding: 0;
}

.nav-menu li {
    margin-bottom: 0.5rem;
}

.nav-menu a {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-menu a:hover {
    background: #f3f4f6;
    text-decoration: none;
}

.nav-menu a.active {
    background: var(--primary);
    color: white;
    font-weight: 500;
}

.content-area {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.recent-activity {
    margin-top: 1.5rem;
}

.activity-list {
    list-style: none;
    padding: 0;
}

.activity-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.activity-time {
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

/* 页面布局样式 */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 2rem 0;
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow);
}

.header h1 {
    color: white;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* 修复AI成书页面页脚显示问题 */
.main {
    min-height: calc(100vh - 200px);
    margin-bottom: 2rem;
    padding: 2rem 0;
}

/* 修复首页欢迎信息部分问题 */
.user-menu {
    margin-bottom: 1rem;
    padding: 0.5rem 1rem;
}

/* 管理员面板移动端优化 */
.admin .header {
    padding: 1rem;
    text-align: center;
}

.admin .user-menu {
    justify-content: center;
    margin-top: 1rem;
}

.admin .dashboard-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.admin .stat-card {
    flex: 1 1 200px;
    max-width: 300px;
}

.admin .nav-menu ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    padding: 0;
    list-style: none;
}

.admin .nav-menu li {
    margin-bottom: 0.5rem;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .user-menu {
        flex-direction: column;
        align-items: stretch;
    }

    .user-menu .btn {
        width: 100%;
        justify-content: center;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .card {
        padding: 1.25rem;
    }

    .form-group {
        margin-bottom: 1.25rem;
    }

    .admin .dashboard-stats {
        flex-direction: column;
        align-items: center;
    }

    .admin .stat-card {
        width: 100%;
        max-width: none;
    }

    justify-content: space-between;
    align-items: center;
    width: 90%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
}



.card-header {
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.card-body {
    padding: 0 1.5rem 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-text {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: 0.25rem;
    display: block;
}

.form-actions {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.alert {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-left: 4px solid #ef4444;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border-left: 4px solid #10b981;
}

.footer {
    background: var(--primary);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer .container {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

@media (max-width: 768px) {
    .container { padding: 0 1rem; }
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.35rem; }
    .card { padding: 1.25rem; }
    .btn { padding: 0.5rem 1rem; }
}

@media (max-width: 640px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    /* .user-menu styles moved to user-menu.css */
    .tab-navigation { overflow-x: auto; padding-bottom: 1rem; }
    .tab-btn { white-space: nowrap; }
}

@media (max-width: 480px) {
    body { font-size: 15px; }
    .card { padding: 1rem; }
    .form-group { margin-bottom: 1.25rem; }
    .button-group { gap: 0.5rem; }
    th, td { padding: 0.5rem; font-size: 0.9rem; }
}

/* 管理员面板样式 */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.header h1 {
    margin-bottom: 0;
    font-size: 1.75rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.stat-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.stat-card h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0;
}

.nav-menu {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.nav-menu ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.nav-menu li a {
    display: block;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500;
    transition: var(--transition);
    color: var(--text-secondary);
}

.nav-menu li a:hover {
    background: #f3f4f6;
    color: var(--primary);
    text-decoration: none;
}

.nav-menu li a.active {
    background: var(--primary);
    color: white;
}

.content-area {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    border: 1px solid var(--border);
}

.recent-activity {
    margin-top: 2rem;
}

.activity-list {
    list-style: none;
}

.activity-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.activity-time {
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

/* 辅助类 */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 2rem; }

.text-center { text-align: center; }

.flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.flex-wrap { flex-wrap: wrap; }

gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.gap-4 { gap: 1.5rem; }
.gap-5 { gap: 2rem; }