/* WordSearch.sbs - Modern CSS Styles */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 触摸优化 */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* 允许文本选择 */
p, h1, h2, h3, h4, h5, h6, li, a, span {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

/* 触摸优化 */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* 允许文本选择 */
p, h1, h2, h3, h4, h5, h6, li, a, span {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    /* 移动端滚动优化 */
    -webkit-overflow-scrolling: touch;
    overflow-scrolling: touch;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    /* 移动端安全区域 */
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

main {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem auto;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    /* 移动端安全区域 */
    margin-left: max(1rem, env(safe-area-inset-left));
    margin-right: max(1rem, env(safe-area-inset-right));
}

section {
    margin-bottom: 2rem;
}

section h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    border-bottom: 3px solid #3498db;
    padding-bottom: 0.5rem;
}

section img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    margin-bottom: 1rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.download-links {
    text-align: center;
    margin: 1.5rem 0;
}

.download-links a {
    display: inline-block;
    padding: 12px 24px;
    margin: 0 10px;
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    /* 触摸优化 */
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-links a:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.download-links a:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(52, 152, 219, 0.3);
}

/* 触摸友好的按钮样式 */
.btn {
    min-height: 44px;
    min-width: 44px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    /* 触摸优化 */
    -webkit-tap-highlight-color: rgba(52, 152, 219, 0.3);
}

.btn-primary {
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

/* 移动端优化的卡片 */
.mobile-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    /* 触摸优化 */
    transition: all 0.2s ease;
}

.mobile-card:active {
    transform: scale(0.98);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

/* 触摸手势指示器 */
.touch-hint {
    position: relative;
}

.touch-hint::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 10px;
    width: 20px;
    height: 20px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23666"><path d="M8.5,13.5l2.5,3.5L14.5,12L19,18H5M21,19V5C21,3.89 20.1,3 19,3H5A2,2 0 0,0 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19Z"/></svg>') no-repeat center;
    background-size: contain;
    transform: translateY(-50%);
    opacity: 0.6;
}

.about-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
    text-align: justify;
}

.related-links ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.related-links li {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 8px;
    padding: 1rem;
    transition: all 0.3s ease;
    border-left: 4px solid #3498db;
}

.related-links li:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.related-links a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
}

.related-links a:hover {
    color: #3498db;
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: white;
    font-size: 0.9rem;
}

/* Navigation Styles */
nav {
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
}

nav a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s ease;
}

nav a:hover {
    background: #3498db;
    color: white;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.category-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.category-card h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.category-card ul {
    list-style: none;
}

.category-card li {
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    background: #f8f9fa;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.category-card li:hover {
    background: #e9ecef;
}

.category-card a {
    color: #495057;
    text-decoration: none;
    font-weight: 500;
}

.category-card a:hover {
    color: #3498db;
}

/* 触摸友好的按钮样式 */
.btn {
    min-height: 44px;
    min-width: 44px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    /* 触摸优化 */
    -webkit-tap-highlight-color: rgba(52, 152, 219, 0.3);
}

.btn-primary {
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

/* 移动端优化的卡片 */
.mobile-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    /* 触摸优化 */
    transition: all 0.2s ease;
}

.mobile-card:active {
    transform: scale(0.98);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

/* 触摸手势指示器 */
.touch-hint {
    position: relative;
}

.touch-hint::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 10px;
    width: 20px;
    height: 20px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23666"><path d="M8.5,13.5l2.5,3.5L14.5,12L19,18H5M21,19V5C21,3.89 20.1,3 19,3H5A2,2 0 0,0 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19Z"/></svg>') no-repeat center;
    background-size: contain;
    transform: translateY(-50%);
    opacity: 0.6;
}

/* 响应式设计 - 增强版 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    main {
        margin: 1rem;
        padding: 1.5rem;
        border-radius: 12px;
    }
    
    .download-links a {
        display: block;
        margin: 0.5rem 0;
        width: 100%;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
    
    nav ul {
        flex-direction: column;
        gap: 1rem;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .category-card {
        padding: 1.5rem;
        border-radius: 12px;
    }
    
    /* 移动端触摸优化 */
    .btn {
        width: 100%;
        max-width: 300px;
        margin: 0.5rem auto;
    }
    
    /* 移动端字体大小优化 */
    body {
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    input, textarea, select {
        font-size: 16px; /* 防止iOS缩放 */
    }
}

@media (max-width: 480px) {
    header {
        padding: 1rem 0;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    main {
        padding: 1rem;
        margin: 0.5rem;
        border-radius: 8px;
    }
    
    section h2 {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    /* 超小屏幕优化 */
    .download-links a {
        padding: 15px 20px;
        font-size: 16px;
    }
    
    .category-card {
        padding: 1rem;
    }
    
    .category-card h3 {
        font-size: 1.3rem;
    }
}

/* 横屏模式优化 */
@media (orientation: landscape) and (max-height: 500px) {
    header {
        padding: 1rem 0;
        margin-bottom: 1rem;
    }
    
    header h1 {
        font-size: 1.8rem;
        margin-bottom: 0.25rem;
    }
    
    header p {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }
    
    main {
        margin: 1rem auto;
        padding: 1.5rem;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .btn, .download-links a {
        border-width: 0.5px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn:hover, .download-links a:hover, .category-card:hover {
        transform: none;
        box-shadow: inherit;
    }
    
    .btn:active, .download-links a:active, .category-card:active {
        transform: scale(0.98);
        opacity: 0.8;
    }
    
    /* 触摸反馈 */
    .touch-feedback {
        position: relative;
        overflow: hidden;
    }
    
    .touch-feedback::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: width 0.3s, height 0.3s;
    }
    
    .touch-feedback:active::after {
        width: 100px;
        height: 100px;
    }
}

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    }
    
    header {
        background: rgba(44, 62, 80, 0.95);
    }
    
    header h1 {
        color: #ecf0f1;
    }
    
    header p {
        color: #bdc3c7;
    }
    
    main {
        background: #34495e;
        color: #ecf0f1;
    }
    
    section h2 {
        color: #3498db;
    }
    
    .category-card {
        background: #2c3e50;
        color: #ecf0f1;
    }
    
    .category-card li {
        background: #34495e;
        color: #ecf0f1;
    }
    
    .category-card li:hover {
        background: #3d4852;
    }
}