/* =================================================================
   MOBILE-FIRST RESPONSIVE DESIGN ENHANCEMENTS
   针对移动端用户体验的全面优化
================================================================= */

/* 基础移动端设置 */
@media (max-width: 768px) {
    
    /* 改进触摸目标大小 - 苹果HIG建议最小44pt */
    .touch-target {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* 移动端按钮优化 */
    button, .btn {
        min-height: 48px;
        padding: 12px 24px;
        font-size: 16px; /* 防止iOS缩放 */
        border-radius: 12px;
        font-weight: 600;
        transition: all 0.2s ease;
    }
    
    /* 输入框优化 */
    input, textarea, select {
        min-height: 48px;
        padding: 12px 16px;
        font-size: 16px; /* 防止iOS缩放 */
        border-radius: 8px;
        border: 2px solid #E5E7EB;
        transition: border-color 0.2s ease;
    }
    
    input:focus, textarea:focus {
        border-color: #007AFF;
        outline: none;
        box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
    }
    
    /* 移动端导航优化 */
    .mobile-nav {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border-radius: 16px 16px 0 0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
        animation: slideUp 0.3s ease-out;
    }
    
    @keyframes slideUp {
        from {
            transform: translateY(100%);
            opacity: 0;
        }
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }
    
    /* 改进移动端间距 */
    .mobile-spacing {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    /* 卡片布局优化 */
    .mobile-card {
        border-radius: 16px;
        padding: 20px;
        margin: 16px;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
        background: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(10px);
    }
    
    /* 文字大小优化 */
    h1 { font-size: 2.5rem; line-height: 1.2; }
    h2 { font-size: 2rem; line-height: 1.3; }
    h3 { font-size: 1.5rem; line-height: 1.4; }
    p, li { font-size: 1.1rem; line-height: 1.6; }
    
    /* 网格布局移动端优化 */
    .mobile-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .mobile-grid-2 {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    
    /* 表单布局优化 */
    .mobile-form {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    
    /* 改进滚动体验 */
    .smooth-scroll {
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
    }
    
    /* 移动端特有动画 */
    .mobile-tap-animation {
        transform: scale(1);
        transition: transform 0.1s ease;
    }
    
    .mobile-tap-animation:active {
        transform: scale(0.95);
    }
    
    /* 隐藏/显示移动端内容 */
    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: block;
    }
    
    /* 改进工具页面移动端体验 */
    .mobile-tool-container {
        padding: 16px;
        max-width: 100vw;
        overflow-x: hidden;
    }
    
    .mobile-calculator {
        background: white;
        border-radius: 20px;
        padding: 24px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        margin-bottom: 20px;
    }
    
    /* 改进游戏选择按钮 */
    .mobile-game-btn {
        padding: 16px 12px;
        border-radius: 12px;
        text-align: center;
        background: white;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        border: 2px solid transparent;
        transition: all 0.2s ease;
        min-height: 80px;
    }
    
    .mobile-game-btn.active {
        border-color: #007AFF;
        background: #F0F8FF;
        transform: scale(1.02);
    }
}

/* 小屏手机优化 (< 414px) */
@media (max-width: 413px) {
    
    .small-mobile-container {
        padding: 12px;
    }
    
    button, .btn {
        font-size: 14px;
        padding: 10px 16px;
        min-height: 44px;
    }
}

/* Touch设备优化 */
@media (hover: none) and (pointer: coarse) {

    .touch-device {
        -webkit-tap-highlight-color: transparent;
    }

    button:hover, .btn:hover {
        transform: none;
    }

    button:active, .btn:active {
        transform: scale(0.95);
        transition: transform 0.1s ease;
    }
}

/* 平板设备优化 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .tablet-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .tablet-spacing {
        padding: 24px;
    }
}

/* 横屏手机优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .landscape-compact {
        padding: 8px 16px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .landscape-nav {
        position: static;
        height: auto;
    }
}

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

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    .mobile-card {
        background: rgba(28, 28, 30, 0.9);
        color: #F5F5F7;
    }

    .mobile-nav {
        background: rgba(28, 28, 30, 0.95);
        color: #F5F5F7;
    }
}

/* 性能优化 - GPU加速 */
.mobile-card,
.mobile-nav,
.mobile-game-btn {
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* 防止文本溢出 */
.mobile-text-wrap {
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
}

/* 改进链接点击区域 */
a {
    position: relative;
}

a::after {
    content: '';
    position: absolute;
    top: -8px;
    right: -8px;
    bottom: -8px;
    left: -8px;
}

/* iOS安全区域支持 */
@supports (padding: max(0px)) {
    .mobile-safe-area {
        padding-top: max(16px, env(safe-area-inset-top));
        padding-bottom: max(16px, env(safe-area-inset-bottom));
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }
}