/* letogther - MacOS 奶昔风格 */
:root {
    --primary: #007AFF;
    --success: #34C759;
    --warning: #FF9500;
    --danger: #FF3B30;
    --purple: #5856D6;
    --bg-gradient: linear-gradient(135deg, #e8f4f8 0%, #d4e4f7 50%, #e8d4f8 100%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--bg-gradient);
    min-height: 100vh;
    color: #333;
}

/* 顶部导航 */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 100;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: #1a1a1a;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #007AFF, #5856D6);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

.search-box {
    flex: 1;
    max-width: 400px;
    margin: 0 30px;
}

.search-box input {
    width: 100%;
    padding: 10px 20px;
    border: none;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
}

.search-box input:focus {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

/* 主内容区 */
.main-container {
    display: flex;
    padding-top: 80px;
    min-height: 100vh;
}

/* 左侧边栏 */
.sidebar {
    width: 240px;
    position: fixed;
    top: 80px;
    left: 0;
    bottom: 0;
    padding: 20px;
    overflow-y: auto;
}

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

.category-item {
    margin-bottom: 5px;
}

.category-title {
    padding: 12px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.category-title:hover {
    transform: translateX(5px);
    background: rgba(255, 255, 255, 0.9);
}

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

.category-icon {
    font-size: 18px;
}

/* 子分类 */
.sub-categories {
    list-style: none;
    margin-left: 30px;
    margin-top: 5px;
    display: none;
}

.sub-categories.show {
    display: block;
}

.sub-category {
    padding: 10px 16px;
    background: transparent;
    cursor: pointer;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-size: 14px;
    color: #666;
}

.sub-category:hover {
    background: var(--glass-bg);
    color: var(--primary);
}

.sub-category.active {
    color: var(--primary);
    font-weight: 500;
}

/* 右侧内容区 */
.content {
    flex: 1;
    margin-left: 240px;
    padding: 20px 30px 40px;
}

/* 资源卡片网格 */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.resource-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--glass-border);
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--purple));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.card-title {
    flex: 1;
}

.card-title h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.card-title .version {
    font-size: 12px;
    color: #888;
}

.card-description {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.card-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: #999;
    margin-bottom: 15px;
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.card-actions {
    display: flex;
    gap: 10px;
}

.btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

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

.btn-primary:hover {
    background: #0066cc;
    transform: scale(1.02);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.8);
    color: #333;
    border: 1px solid #ddd;
}

.btn-secondary:hover {
    background: white;
    transform: scale(1.02);
}

/* 分类标题 */
.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    padding: 10px 0;
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 15px;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .content {
        margin-left: 0;
    }
    
    .resource-grid {
        grid-template-columns: 1fr;
    }
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
    color: #999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}