/* 响应式设计 */

/* 平板设备 (768px 及以下) */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg) 0;
        z-index: 1000;
        flex-direction: column;
        border-top: 1px solid var(--gray-200);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: var(--spacing-md) var(--spacing-xl);
        border-bottom: 1px solid var(--gray-100);
        text-align: left;
        width: 100%;
        justify-content: flex-start;
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    
    .hero-visual {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-item {
        width: 100%;
    }
    
    .filter-select {
        min-width: auto;
    }
    
    .records-grid {
        grid-template-columns: 1fr;
    }
    
    .contest-table {
        font-size: 0.875rem;
    }
    
    .contest-table th,
    .contest-table td {
        padding: var(--spacing-sm);
    }
    
    .times-list {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .records-table {
        font-size: 0.875rem;
    }
    
    .records-table th,
    .records-table td {
        padding: var(--spacing-sm);
    }
    
    .project-tabs {
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch; /* iOS平滑滚动 */
        scroll-behavior: smooth; /* 平滑滚动 */
    }
    
    .project-tab {
        flex-shrink: 0;
        font-size: 0.9rem; /* 移动端稍微缩小字体 */
        padding: var(--spacing-sm) var(--spacing-md); /* 减小内边距 */
    }
    
    .week-header {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .export-week-btn {
        font-size: 0.8125rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .export-week-btn span {
        display: none; /* 移动端只显示图标 */
    }
}

/* 手机设备 (480px 及以下) */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .record-times {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .contest-table {
        font-size: 0.75rem;
    }
    
    .records-table {
        font-size: 0.75rem;
    }
    
    .records-table th,
    .records-table td {
        padding: var(--spacing-sm);
    }
    
    .record-type-switch {
        width: 100%;
        justify-content: center;
    }
    
    .switch-btn {
        flex: 1;
        justify-content: center;
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-content {
        padding: 0 var(--spacing-sm);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .activity-item {
        padding: var(--spacing-md);
    }
    
    .week-content {
        padding: var(--spacing-lg);
    }
    
    .week-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .records-table-container {
        overflow-x: auto;
    }
    
    .contest-table {
        min-width: 600px;
    }
}

/* 大屏幕设备 (1200px 及以上) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .nav-container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .records-grid {
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    }
}

/* 超小屏幕设备 (320px 及以下) */
@media (max-width: 320px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .page-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
    
    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    
    .contest-table {
        font-size: 0.7rem;
    }
    
    .records-table {
        font-size: 0.7rem;
    }
}

/* 横屏手机设备 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 2rem;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-subtitle {
        margin-bottom: var(--spacing-lg);
    }
    
    
    .page-header {
        padding: var(--spacing-lg) 0;
    }
    
    .page-title {
        font-size: 2rem;
        margin-bottom: var(--spacing-sm);
    }
}

/* 高分辨率屏幕 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero::before {
        background-size: 20px 20px;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .footer,
    .filters,
    .nav-toggle {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    .hero {
        background: none !important;
        color: var(--text-primary) !important;
        padding: var(--spacing-md) 0;
    }
    
    .hero::before {
        display: none;
    }
    
    .hero-visual {
        display: none;
    }
    
    .feature-card,
    .activity-item,
    .week-card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
        break-inside: avoid;
    }
    
    .records-table,
    .contest-table {
        font-size: 0.8rem;
    }
    
    .records-table th,
    .records-table td,
    .contest-table th,
    .contest-table td {
        padding: var(--spacing-xs);
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --gray-50: #374151;
        --gray-100: #4b5563;
        --gray-200: #6b7280;
    }
    
    .navbar {
        background: rgba(31, 41, 55, 0.95);
        border-bottom-color: var(--gray-700);
    }
    
    .feature-card,
    .activity-item,
    .week-card,
    .records-table-container {
        background: var(--bg-primary);
        border-color: var(--gray-700);
    }
    
    .filter-select {
        background: var(--bg-primary);
        border-color: var(--gray-600);
        color: var(--text-primary);
    }
    
    .filter-reset {
        background: var(--gray-700);
        border-color: var(--gray-600);
        color: var(--text-secondary);
    }
    
    .filter-reset:hover {
        background: var(--gray-600);
        color: var(--text-primary);
    }
}

/* 减少动画效果 (用户偏好) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .cube {
        animation: none;
    }
    
    .fade-in-up {
        animation: none;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0000ff;
        --text-primary: #000000;
        --text-secondary: #000000;
        --bg-primary: #ffffff;
        --bg-secondary: #ffffff;
    }
    
    .feature-card,
    .activity-item,
    .week-card {
        border: 2px solid #000000;
    }
    
    .nav-link:hover,
    .nav-link.active {
        background-color: #000000;
        color: #ffffff;
    }
}