/**
 * 响应式布局优化
 * 多设备自适应适配
 */

/* ========== 基础响应式变量 ========== */
:root {
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --header-height: 64px;
    --content-padding: 24px;
    --card-gap: 20px;
}

/* ========== 桌面端 (>= 1024px) ========== */
@media (min-width: 1024px) {
    .container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 var(--content-padding);
    }
    
    .grid-responsive {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: var(--card-gap);
    }
    
    .sidebar {
        width: var(--sidebar-width);
        position: fixed;
        height: 100vh;
    }
    
    .main-content {
        margin-left: var(--sidebar-width);
        min-height: 100vh;
    }
}

/* ========== 平板端 (768px - 1023px) ========== */
@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --sidebar-width: 220px;
        --content-padding: 16px;
        --card-gap: 16px;
    }
    
    .container {
        max-width: 100%;
        padding: 0 var(--content-padding);
    }
    
    .grid-responsive {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--card-gap);
    }
    
    .sidebar {
        width: var(--sidebar-width);
        position: fixed;
        height: 100vh;
        transform: translateX(0);
        transition: transform 0.3s ease;
    }
    
    .sidebar.collapsed {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: var(--sidebar-width);
        transition: margin-left 0.3s ease;
    }
    
    .main-content.sidebar-collapsed {
        margin-left: 0;
    }
    
    /* 表格优化 */
    .data-table {
        font-size: 14px;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 12px;
    }
    
    /* 卡片优化 */
    .card {
        padding: 16px;
    }
    
    /* 按钮优化 */
    .btn {
        padding: 10px 18px;
        font-size: 14px;
    }
}

/* ========== 移动端 (< 768px) ========== */
@media (max-width: 767px) {
    :root {
        --content-padding: 12px;
        --card-gap: 12px;
    }
    
    .container {
        max-width: 100%;
        padding: 0 var(--content-padding);
    }
    
    /* 侧边栏变为底部导航或汉堡菜单 */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
    
    .main-content {
        margin-left: 0;
        padding-top: 60px;
    }
    
    /* 导航栏变为汉堡菜单 */
    .navbar {
        flex-wrap: wrap;
        padding: 10px var(--content-padding);
    }
    
    .navbar-brand {
        font-size: 16px;
    }
    
    .navbar-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        padding: 10px 0;
    }
    
    .navbar-nav.open,
    .navbar-nav.show {
        display: flex;
    }
    
    .mobile-menu-btn,
    .navbar-toggle {
        display: block;
        background: none;
        border: none;
        color: #fff;
        font-size: 24px;
        cursor: pointer;
        padding: 5px 10px;
    }
    
    .mobile-menu-btn:hover,
    .navbar-toggle:hover {
        color: var(--primary-color);
    }
    
    /* 网格变为单列 */
    .grid-responsive {
        display: flex;
        flex-direction: column;
        gap: var(--card-gap);
    }
    
    /* 表格变为卡片式 */
    .data-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .data-table thead {
        display: none;
    }
    
    .data-table tbody,
    .data-table tr,
    .data-table td {
        display: block;
        width: 100%;
    }
    
    .data-table tr {
        margin-bottom: 12px;
        padding: 12px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .data-table td {
        padding: 8px 0;
        text-align: left;
        position: relative;
        padding-left: 40%;
    }
    
    .data-table td::before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        width: 35%;
        font-weight: 600;
        color: rgba(255, 255, 255, 0.6);
    }
    
    /* 卡片优化 */
    .card {
        padding: 14px;
        border-radius: 14px;
    }
    
    .card-title {
        font-size: 16px;
    }
    
    /* 按钮优化 */
    .btn {
        padding: 10px 16px;
        font-size: 14px;
        width: 100%;
        text-align: center;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    /* 表单优化 */
    .form-group {
        margin-bottom: 14px;
    }
    
    .form-group label {
        display: block;
        margin-bottom: 6px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    /* 模态框优化 */
    .modal-content {
        width: 90%;
        max-width: 90%;
        margin: 10% auto;
        padding: 20px;
    }
    
    /* 统计卡片 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .stat-card {
        padding: 14px;
    }
    
    .stat-value {
        font-size: 24px;
    }
    
    .stat-label {
        font-size: 12px;
    }
}

/* ========== 小屏手机 (< 480px) ========== */
@media (max-width: 479px) {
    :root {
        --content-padding: 10px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 12px;
    }
    
    .btn {
        padding: 10px 14px;
        font-size: 13px;
    }
}

/* ========== 横屏优化 ========== */
@media (max-height: 500px) and (orientation: landscape) {
    .sidebar {
        width: 60px;
    }
    
    .sidebar .nav-text {
        display: none;
    }
    
    .main-content {
        margin-left: 60px;
    }
}

/* ========== 打印优化 ========== */
@media print {
    .sidebar,
    .navbar,
    .btn,
    .modal {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    body {
        background: #fff !important;
        color: #000 !important;
    }
}

/* ========== 高对比度模式 ========== */
@media (prefers-contrast: high) {
    :root {
        --glass-border: rgba(255, 255, 255, 0.4);
        --glass-bg: rgba(255, 255, 255, 0.15);
    }
    
    .card,
    .glass-effect {
        border-width: 2px;
    }
}

/* ========== 减少动画模式 ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 深色模式优化 ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0a0a1a;
        --bg-secondary: #1a1a2e;
        --text-primary: #ffffff;
        --text-secondary: rgba(255, 255, 255, 0.7);
    }
}

/* ========== 触摸设备优化 ========== */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .card,
    .nav-item {
        min-height: 44px; /* 最小触摸区域 */
    }
    
    .btn:active,
    .card:active {
        transform: scale(0.98);
    }
}