/* CursorNews 全局样式文件 */
/* 作者: CursorNews Team */
/* 创建时间: 2025-01-15 */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 主题颜色变量 */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* 头部导航样式 */
.navbar {
    background-color: white;
    box-shadow: 0 2px 4px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    color: var(--dark-color) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* 主要内容区域 */
.main-container {
    min-height: calc(100vh - 140px);
    padding: 2rem 0;
}

/* 新闻卡片样式 */
.news-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.news-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.news-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--dark-color);
    text-decoration: none;
    display: block;
    line-height: 1.4;
}

.news-title:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--secondary-color);
}

.news-source {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.news-category {
    background-color: var(--info-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.news-summary {
    color: var(--secondary-color);
    line-height: 1.6;
    margin-bottom: 1rem;
}

/* 筛选栏样式 */
.filter-bar {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
    margin-bottom: 2rem;
}

.filter-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    font-weight: 500;
}

.filter-tab:hover {
    background-color: var(--light-color);
}

.filter-tab.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 搜索框样式 */
.search-container {
    position: relative;
    max-width: 400px;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    font-size: 0.875rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 加载状态 */
.loading-skeleton {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.skeleton-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.skeleton-title {
    height: 1.5rem;
    background-color: #e9ecef;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.skeleton-meta {
    height: 1rem;
    background-color: #e9ecef;
    border-radius: 4px;
    width: 60%;
    margin-bottom: 0.75rem;
}

.skeleton-text {
    height: 1rem;
    background-color: #e9ecef;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
}

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

/* 表单样式 */
.form-control {
    border-radius: 6px;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 消息提示样式 */
.alert {
    border-radius: 8px;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border: none;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
}

/* 页脚样式 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 2rem 0 1rem;
    margin-top: 3rem;
}

.footer a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

/* 模态框样式 */
.modal-content {
    border-radius: 12px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-container {
        padding: 1rem 0;
    }
    
    .news-card-body {
        padding: 1rem;
    }
    
    .filter-bar {
        padding: 1rem;
    }
    
    .filter-tabs {
        gap: 0.25rem;
    }
    
    .filter-tab {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .news-title {
        font-size: 1.125rem;
    }
    
    .news-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

@media (max-width: 576px) {
    .filter-tabs {
        justify-content: center;
    }
    
    .search-container {
        max-width: 100%;
        margin-top: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

/* 工具类 */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.text-truncate-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.shadow-sm {
    box-shadow: 0 2px 4px var(--shadow-color) !important;
}

.shadow {
    box-shadow: 0 4px 8px var(--shadow-color) !important;
}

.shadow-lg {
    box-shadow: 0 8px 16px var(--shadow-color) !important;
}

/* 无障碍优化 */
.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Focus状态优化 */
button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    .navbar,
    .filter-bar,
    .footer {
        display: none !important;
    }
    
    .news-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }
}