/**
 * 响应式设计增强样式
 * 针对不同设备尺寸优化用户体验
 */

/* 基础响应式变量 */
:root {
    /* 断点定义 */
    --breakpoint-xs: 480px;
    --breakpoint-sm: 768px;
    --breakpoint-md: 1024px;
    --breakpoint-lg: 1200px;
    --breakpoint-xl: 1400px;
    
    /* 响应式间距 */
    --spacing-responsive-xs: clamp(0.5rem, 2vw, 1rem);
    --spacing-responsive-sm: clamp(1rem, 3vw, 1.5rem);
    --spacing-responsive-md: clamp(1.5rem, 4vw, 2rem);
    --spacing-responsive-lg: clamp(2rem, 5vw, 3rem);
    --spacing-responsive-xl: clamp(3rem, 6vw, 4rem);
    
    /* 响应式字体 */
    --font-size-responsive-xs: clamp(0.75rem, 2vw, 0.875rem);
    --font-size-responsive-sm: clamp(0.875rem, 2.5vw, 1rem);
    --font-size-responsive-md: clamp(1rem, 3vw, 1.125rem);
    --font-size-responsive-lg: clamp(1.125rem, 3.5vw, 1.25rem);
    --font-size-responsive-xl: clamp(1.25rem, 4vw, 1.5rem);
    --font-size-responsive-xxl: clamp(1.5rem, 5vw, 2rem);
    --font-size-responsive-title: clamp(2rem, 6vw, 3rem);
}

/* 容器响应式 */
.container {
    width: 100%;
    max-width: var(--breakpoint-lg);
    margin: 0 auto;
    padding: 0 var(--spacing-responsive-sm);
}

@media (min-width: 1400px) {
    .container {
        max-width: var(--breakpoint-xl);
    }
}

/* 网格系统增强 */
.grid {
    display: grid;
    gap: var(--spacing-responsive-md);
}

.grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 响应式网格 */
@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .grid-auto {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) and (max-width: 1200px) {
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 导航栏响应式增强 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(44, 62, 80, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .navbar {
        padding: 0.75rem 0;
    }
    
    .navbar .logo {
        font-size: var(--font-size-responsive-lg);
    }
}

/* 卡片组件响应式 */
.card {
    background: rgba(22, 30, 45, 0.6);
    border: 1px solid rgba(45, 126, 231, 0.1);
    border-radius: 12px;
    padding: var(--spacing-responsive-md);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(45, 126, 231, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

@media (max-width: 480px) {
    .card {
        padding: var(--spacing-responsive-sm);
        border-radius: 8px;
    }
    
    .card:hover {
        transform: translateY(-2px);
    }
}

/* 按钮响应式 */
.btn {
    padding: var(--spacing-responsive-xs) var(--spacing-responsive-sm);
    font-size: var(--font-size-responsive-sm);
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-small {
    padding: calc(var(--spacing-responsive-xs) * 0.75) var(--spacing-responsive-xs);
    font-size: var(--font-size-responsive-xs);
}

.btn-large {
    padding: var(--spacing-responsive-sm) var(--spacing-responsive-md);
    font-size: var(--font-size-responsive-md);
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .btn-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .btn-group .btn {
        width: 100%;
    }
}

/* 表格响应式 */
.table-responsive {
    overflow-x: auto;
    margin: var(--spacing-responsive-md) 0;
}

.table-responsive table {
    min-width: 600px;
    width: 100%;
}

@media (max-width: 768px) {
    .table-responsive {
        border-radius: 8px;
        box-shadow: 0 0 0 1px rgba(45, 126, 231, 0.1);
    }
    
    .table-responsive::-webkit-scrollbar {
        height: 8px;
    }
    
    .table-responsive::-webkit-scrollbar-track {
        background: rgba(45, 126, 231, 0.1);
        border-radius: 4px;
    }
    
    .table-responsive::-webkit-scrollbar-thumb {
        background: rgba(45, 126, 231, 0.3);
        border-radius: 4px;
    }
}

/* 代码块响应式 */
.code-block {
    margin: var(--spacing-responsive-md) 0;
    border-radius: 12px;
    overflow: hidden;
}

.code-block pre {
    padding: var(--spacing-responsive-md);
    overflow-x: auto;
    font-size: var(--font-size-responsive-sm);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .code-block {
        margin: var(--spacing-responsive-sm) 0;
        border-radius: 8px;
    }
    
    .code-block pre {
        padding: var(--spacing-responsive-sm);
        font-size: var(--font-size-responsive-xs);
    }
}

/* 模态框响应式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: var(--spacing-responsive-sm);
}

.modal-content {
    background: rgba(22, 30, 45, 0.95);
    border: 1px solid rgba(45, 126, 231, 0.3);
    border-radius: 12px;
    padding: var(--spacing-responsive-lg);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    backdrop-filter: blur(15px);
}

@media (max-width: 768px) {
    .modal {
        padding: var(--spacing-responsive-xs);
    }
    
    .modal-content {
        padding: var(--spacing-responsive-md);
        max-width: 95vw;
        max-height: 95vh;
        border-radius: 8px;
    }
}

/* 工具提示响应式 */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(22, 30, 45, 0.95);
    color: #f3f4f6;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid rgba(45, 126, 231, 0.3);
    backdrop-filter: blur(10px);
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

@media (max-width: 768px) {
    .tooltip::after {
        position: fixed;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%);
        white-space: normal;
        max-width: 200px;
        text-align: center;
    }
    
    .tooltip:hover::after {
        transform: translateX(-50%);
    }
}

/* 图片响应式 */
.responsive-img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.img-container {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
}

.img-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.img-container:hover img {
    transform: scale(1.05);
}

/* 视频响应式 */
.video-responsive {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
}

.video-responsive iframe,
.video-responsive video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 12px;
}

/* 加载状态 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-responsive-lg);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(45, 126, 231, 0.1);
    border-top: 3px solid #2d7ee7;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 错误状态 */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: var(--spacing-responsive-sm);
    border-radius: 8px;
    margin: var(--spacing-responsive-sm) 0;
}

/* 成功状态 */
.success-message {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
    padding: var(--spacing-responsive-sm);
    border-radius: 8px;
    margin: var(--spacing-responsive-sm) 0;
}

/* 警告状态 */
.warning-message {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
    padding: var(--spacing-responsive-sm);
    border-radius: 8px;
    margin: var(--spacing-responsive-sm) 0;
}

/* 信息状态 */
.info-message {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #3b82f6;
    padding: var(--spacing-responsive-sm);
    border-radius: 8px;
    margin: var(--spacing-responsive-sm) 0;
}

/* 可访问性增强 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .card {
        border-width: 2px;
        border-color: #2d7ee7;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .code-block {
        border: 2px solid #2d7ee7;
    }
}

/* 深色模式偏好 */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: #0a0a0a;
        --color-bg-secondary: #1a1a1a;
        --color-text-primary: #ffffff;
        --color-text-secondary: #e5e5e5;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .progress-tracker,
    .back-to-top,
    .search-container,
    .mobile-menu-btn {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        background: white !important;
        border: 1px solid #ccc !important;
        box-shadow: none !important;
        page-break-inside: avoid;
    }
    
    .code-block {
        background: #f5f5f5 !important;
        border: 1px solid #ccc !important;
    }
    
    .btn {
        background: white !important;
        color: black !important;
        border: 1px solid #ccc !important;
    }
}

/* 超大屏幕优化 */
@media (min-width: 1600px) {
    .container {
        max-width: 1400px;
    }
    
    .grid-auto {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

/* 超小屏幕优化 */
@media (max-width: 360px) {
    :root {
        --spacing-responsive-xs: 0.5rem;
        --spacing-responsive-sm: 0.75rem;
        --spacing-responsive-md: 1rem;
    }
    
    .container {
        padding: 0 0.75rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
}

/* 横屏模式优化 */
@media (orientation: landscape) and (max-height: 600px) {
    .modal-content {
        max-height: 85vh;
    }
    
    .progress-panel {
        max-height: 70vh;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .card,
    .nav-links a {
        min-height: 44px;
        min-width: 44px;
    }
    
    .tooltip:hover::after {
        display: none;
    }
    
    .tooltip:active::after {
        display: block;
    }
}