/* 磁力猫 - 2025年现代化样式 */

/* 基础样式重置和优化 */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    overflow-x: hidden;
}

/* 自定义CSS变量 */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --border-radius: 0.75rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --vh: 1vh;
}

/* 导航栏增强样式 */
nav.nav-scrolled {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-light);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

/* 搜索框增强效果 */
.search-container {
    position: relative;
}

.search-container::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.search-container:hover::before,
.search-container:focus-within::before {
    opacity: 0.1;
}

/* 卡片悬浮效果增强 */
.resource-card {
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.resource-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-heavy);
    border-color: rgba(99, 102, 241, 0.3);
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    opacity: 0;
    transition: var(--transition);
}

.resource-card:hover::before {
    opacity: 1;
}

/* 按钮增强效果 */
button, .btn {
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

button::before, .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

button:hover::before, .btn:hover::before {
    left: 100%;
}

/* 加载动画 */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* 页面加载动画 */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

.bounce-in {
    animation: bounceIn 0.8s ease-out;
}

.animate-delay-100 { animation-delay: 0.1s; }
.animate-delay-200 { animation-delay: 0.2s; }
.animate-delay-300 { animation-delay: 0.3s; }
.animate-delay-400 { animation-delay: 0.4s; }

/* 移动端优化 */
@media (max-width: 768px) {
    /* 视窗高度适配 */
    .min-h-screen {
        min-height: calc(var(--vh, 1vh) * 100);
    }

    /* 导航栏移动端优化 */
    nav {
        position: fixed;
        width: 100%;
        z-index: 1000;
    }

    body {
        padding-top: 64px;
    }

    /* 搜索框移动端布局 */
    .search-container {
        padding: 1rem;
    }

    .search-container form {
        flex-direction: column;
        gap: 1rem;
    }

    .search-container input {
        font-size: 16px; /* 防止iOS缩放 */
    }

    /* 卡片网格移动端优化 */
    .grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* 热门标签移动端优化 */
    .hot-tags {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }

    .hot-tags span {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
    }

    /* 排行榜移动端优化 */
    .ranking-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* 页脚移动端优化 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

/* 中等屏幕优化 */
@media (min-width: 769px) and (max-width: 1024px) {
    .grid-cols-1.md\\:grid-cols-2.lg\\:grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-1.lg\\:grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 大屏幕优化 */
@media (min-width: 1536px) {
    .max-w-7xl {
        max-width: 90rem;
    }
}

/* 触摸设备优化 */
.touch-device button,
.touch-device .cursor-pointer {
    min-height: 44px; /* 确保触摸目标足够大 */
    min-width: 44px;
}

.touch-device .resource-card {
    padding: 1.5rem;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .bg-gradient-to-br {
        background: #ffffff;
    }

    .text-gray-600 {
        color: #000000;
    }

    .border-gray-100 {
        border-color: #000000;
    }
}

/* 减少动画模式支持 */
@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;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1f2937;
        --bg-secondary: #374151;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --border-color: #4b5563;
    }

    body {
        background: var(--bg-primary);
        color: var(--text-primary);
    }

    .bg-white {
        background-color: var(--bg-secondary);
    }

    .text-gray-800 {
        color: var(--text-primary);
    }

    .text-gray-600 {
        color: var(--text-secondary);
    }

    .border-gray-100 {
        border-color: var(--border-color);
    }
}

/* 性能优化 */
.resource-card,
button,
.hover\\:shadow-xl {
    will-change: transform;
}

/* 确保图片加载优化 */
img {
    loading: lazy;
    decoding: async;
}

/* 聚焦样式优化 */
button:focus,
input:focus,
select:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* 错误状态样式 */
.error-state {
    color: var(--error-color);
    border-color: var(--error-color);
}

.success-state {
    color: var(--success-color);
    border-color: var(--success-color);
}

.warning-state {
    color: var(--warning-color);
    border-color: var(--warning-color);
}

/* 加载状态样式 */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #5a67d8, #6b46c1);
}

/* 选择文本样式 */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: #1f2937;
}

::-moz-selection {
    background: rgba(99, 102, 241, 0.3);
    color: #1f2937;
}

/* 打印样式 */
@media print {
    .no-print,
    nav,
    footer,
    button {
        display: none !important;
    }

    .resource-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }

    body {
        background: white;
        color: black;
    }
}

/* SEO增强 - 结构化数据支持 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 无障碍增强 */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 9999;
}

.skip-link:focus {
    top: 6px;
}

/* 渐进增强 - 如果JS未加载 */
.no-js .js-only {
    display: none;
}

.no-js .no-js-fallback {
    display: block;
}

/* 连接状态指示 */
.offline {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #ef4444;
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 14px;
    z-index: 9999;
}