/* 响应式设计 */

/* 平板设备 */
@media (max-width: 1024px) {
    :root {
        --container-width: 100%;
        --content-width: 100%;
        --sidebar-width: 280px;
    }
    
    .content-wrapper {
        grid-template-columns: 1fr 280px;
        gap: var(--spacing-xl);
    }
    
    .search-input {
        width: 180px;
    }
}

/* 小平板设备 */
@media (max-width: 768px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
    }
    
    .site-header {
        position: relative;
    }
    
    .header-content {
        flex-wrap: wrap;
        height: auto;
        min-height: 60px;
        padding: var(--spacing-sm) 0;
    }
    
    .site-branding {
        flex: 1;
    }
    
    .main-navigation {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-navigation.show {
        display: block;
    }
    
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .sidebar {
        order: -1;
    }
    
    .posts-grid {
        gap: var(--spacing-xl);
    }
    
    .post-card {
        margin-bottom: 0;
    }
    
    .post-thumbnail {
        height: 180px;
    }
    
    .search-box {
        width: 100%;
        margin-top: var(--spacing-sm);
    }
    
    .search-input {
        width: 100%;
    }
    
    .header-tools {
        width: 100%;
        justify-content: space-between;
        margin-top: var(--spacing-sm);
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-content {
        padding: var(--spacing-xl) 0;
    }
    
    .post-content {
        padding: var(--spacing-lg);
    }
    
    .post-title {
        font-size: 1.25rem;
    }
    
    .post-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .post-footer {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .post-tags {
        width: 100%;
    }
    
    .pagination-nav a,
    .pagination-nav span {
        padding: var(--spacing-xs) var(--spacing-sm);
        margin: 0 2px;
        font-size: 0.875rem;
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 45px;
        height: 45px;
    }
    
    .site-title {
        font-size: 1.25rem;
    }
    
    .site-description {
        display: none;
    }
}

/* 超小屏幕 */
@media (max-width: 320px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    .post-content {
        padding: var(--spacing-md);
    }
    
    .header-tools {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .search-box {
        order: 2;
    }
    
    .theme-toggle,
    .mobile-menu-toggle {
        order: 1;
    }
}

/* 横屏手机 */
@media (max-width: 768px) and (orientation: landscape) {
    .main-content {
        padding: var(--spacing-lg) 0;
    }
    
    .post-thumbnail {
        height: 150px;
    }
}

/* 高分辨率屏幕 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .post-thumbnail img {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* 打印样式 */
@media print {
    .site-header,
    .sidebar,
    .back-to-top,
    .mobile-menu-toggle,
    .reading-progress,
    .post-actions,
    .post-navigation,
    .comments-section {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
    }
    
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .post-card {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }
    
    a {
        text-decoration: underline;
    }
    
    .post-title {
        color: #000;
    }
}

/* 减少动画的用户偏好 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .page-loading-bar {
        animation: none;
    }
    
    .back-to-top {
        transition: opacity 0.3s ease;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --shadow-color: rgba(0, 0, 0, 0.5);
    }
    
    .post-card {
        border: 2px solid var(--border-color);
    }
    
    .nav-menu a:hover,
    .nav-menu .current a {
        background: #000;
        color: #fff;
    }
}