/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 浅色主题变量 */
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #9b59b6;
    --text-color: #333;
    --text-secondary: #666;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --header-bg: #ffffff;
    --border-color: #e1e5e9;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --hover-bg: #f0f2f5;
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    /* 深色主题变量 */
    --primary-color: #4aa1db;
    --secondary-color: #ecf0f1;
    --accent-color: #a66bbe;
    --text-color: #e0e0e0;
    --text-secondary: #b0b0b0;
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --header-bg: #242424;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --hover-bg: #3a3a3a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
    padding: 30px 0;
    position: relative;
}

.header-content {
    text-align: center;
    margin-bottom: 30px;
    width: 100%;
}

.site-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.site-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 搜索框样式 */
.search-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 20px;
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box .search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.2rem;
}

#searchInput {
    width: 100%;
    padding: 16px 60px 16px 50px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: all var(--transition-speed);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.clear-btn {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    display: none;
}

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

.search-hint {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    min-height: 20px;
}

/* 主题切换按钮 */
.theme-switch-container {
    position: absolute;
    top: 20px;
    right: 20px;
}

.theme-toggle {
    width: 60px;
    height: 30px;
    border-radius: 15px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    color: var(--text-color);
    transition: all var(--transition-speed);
}

.theme-toggle i {
    font-size: 0.9rem;
    z-index: 1;
}

.theme-toggle::after {
    content: '';
    position: absolute;
    left: 4px;
    width: 22px;
    height: 22px;
    background: var(--primary-color);
    border-radius: 50%;
    transition: transform var(--transition-speed);
}

[data-theme="dark"] .theme-toggle::after {
    transform: translateX(30px);
}

/* 分类导航 */
.category-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    padding: 10px 0;
}

.category-btn {
    padding: 10px 20px;
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-color);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-btn:hover {
    background-color: var(--hover-bg);
    transform: translateY(-2px);
}

.category-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 网站网格布局 */
.main-content {
    flex: 1;
}

.websites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

/* 网站卡片样式 */
.website-card {
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    text-decoration: none;
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all var(--transition-speed);
    border: 1px solid var(--border-color);
    height: 100%;
}

.website-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-color);
    border-color: var(--primary-color);
}

.website-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    margin-bottom: 20px;
    object-fit: contain;
    background-color: var(--bg-color);
    padding: 10px;
}

.website-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

.website-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.4;
    flex: 1;
}

.website-category {
    display: inline-block;
    padding: 5px 12px;
    background-color: var(--bg-color);
    color: var(--text-secondary);
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* 空状态提示 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

/* 页脚样式 */
.footer {
    text-align: center;
    padding: 30px 0;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.footer a:hover {
    text-decoration: underline;
}

.site-count {
    margin-top: 10px;
    font-size: 0.85rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .site-title {
        font-size: 2rem;
    }
    
    .websites-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .header {
        padding: 20px 0;
    }
    
    .theme-switch-container {
        position: relative;
        top: 0;
        right: 0;
        margin-top: 20px;
    }
}

@media (max-width: 480px) {
    .websites-grid {
        grid-template-columns: 1fr;
    }
    
    .category-nav {
        gap: 8px;
    }
    
    .category-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    #searchInput {
        padding: 14px 50px 14px 45px;
    }
    
    .website-card {
        padding: 20px;
    }
}

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

.website-card {
    animation: fadeIn 0.5s ease-out forwards;
}