/* 海云博客 - 现代美观版样式表 */

/* 现代色彩方案 */
:root {
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background-color: #f8fafc;
    color: #334155;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 现代导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.1rem;
    color: white;
    letter-spacing: -0.025em;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    padding: 0.375rem 0.75rem;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    margin: 0 0.125rem;
}

.navbar-nav .nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.navbar-nav .dropdown-menu {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: 0.5rem;
    padding: 0.5rem 0;
}

.navbar-nav .dropdown-item {
    padding: 0.5rem 1rem;
    color: var(--dark-color);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.navbar-nav .dropdown-item:hover {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

/* 主容器 */
.container {
    max-width: 1200px;
    padding: 1rem 1rem;
}

/* 现代卡片设计 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    margin-bottom: 1rem;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.card-header {
    background: linear-gradient(to right, #f8fafc, #f1f5f9);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-weight: 500;
    color: var(--dark-color);
    font-size: 0.95rem;
}

.card-body {
    padding: 1rem;
}

/* 文章卡片 */
.article-card {
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
}

.article-card:hover {
    border-left-color: var(--primary-color);
    background-color: #f8fafc;
}

.article-card .card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    line-height: 1.4;
}

.article-card .card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.article-card .card-title a:hover {
    color: var(--primary-color);
}

/* 文章元数据 */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--secondary-color);
    font-size: 0.8rem;
}

.article-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    background: #f1f5f9;
    border-radius: 12px;
    transition: all 0.2s ease;
}

.article-meta-item:hover {
    background: #e2e8f0;
}

.article-meta-item i {
    font-size: 0.7rem;
    color: var(--primary-color);
}

/* 现代按钮 */
.btn {
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid transparent;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border: none;
    color: white;
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

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

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.85rem;
}

/* 搜索框 */
.search-box {
    position: relative;
}

.search-box .form-control {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    background: var(--card-bg);
}

.search-box .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* 侧边栏 */
.sidebar-card {
    position: sticky;
    top: 1rem;
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.category-list li:last-child {
    border-bottom: none;
}

.category-list li:hover {
    padding-left: 0.5rem;
}

.category-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--dark-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.category-list a:hover {
    color: var(--primary-color);
}

.category-list i {
    color: var(--primary-color);
    margin-right: 0.5rem;
    font-size: 0.8rem;
}

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #f1f5f9;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    font-size: 0.8rem;
    color: var(--secondary-color);
    text-decoration: none;
    transition: all 0.2s ease;
}

.tag:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* 分页 */
.pagination {
    margin-top: 1.5rem;
}

.page-link {
    border: 1px solid var(--border-color);
    color: var(--dark-color);
    padding: 0.5rem 0.75rem;
    margin: 0 0.125rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.page-link:hover {
    background-color: #f1f5f9;
    border-color: var(--border-color);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-color: var(--primary-color);
    color: white;
}

/* 页脚 */
.footer {
    background: linear-gradient(to bottom, #f8fafc, #f1f5f9);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
    margin-top: 2rem;
    color: var(--secondary-color);
    font-size: 0.85rem;
}

.footer a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: var(--primary-color);
}

.footer i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

/* 消息提示 */
.alert {
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.alert-dismissible .btn-close {
    padding: 0.75rem;
    background-size: 0.75rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0.75rem;
    }
    
    .card-body {
        padding: 0.75rem;
    }
    
    .article-meta {
        gap: 0.5rem;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

/* 工具类 */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-hover {
    transition: box-shadow 0.3s ease;
}

.shadow-hover:hover {
    box-shadow: var(--shadow-md) !important;
}

/* 加载状态 */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}