/* Apple Style Design System */
:root {
    /* Apple Color Palette */
    --apple-blue: #007AFF;
    --apple-green: #34C759;
    --apple-orange: #FF9500;
    --apple-red: #FF3B30;
    --apple-purple: #AF52DE;
    --apple-pink: #FF2D92;
    --apple-yellow: #FFCC00;
    
    /* Neutral Colors */
    --apple-gray-1: #F2F2F7;
    --apple-gray-2: #E5E5EA;
    --apple-gray-3: #D1D1D6;
    --apple-gray-4: #C7C7CC;
    --apple-gray-5: #AEAEB2;
    --apple-gray-6: #8E8E93;
    --apple-gray-7: #636366;
    --apple-gray-8: #48484A;
    --apple-gray-9: #3A3A3C;
    --apple-gray-10: #2C2C2E;
    --apple-gray-11: #1C1C1E;
    
    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F2F2F7;
    --bg-tertiary: #FFFFFF;
    --bg-grouped: #F2F2F7;
    
    /* Text Colors */
    --text-primary: #000000;
    --text-secondary: #3C3C43;
    --text-tertiary: #3C3C4399;
    --text-quaternary: #3C3C4366;
    
    /* Border Colors */
    --border-primary: #C6C6C8;
    --border-secondary: #E5E5EA;
    
    /* Shadow Colors */
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-heavy: rgba(0, 0, 0, 0.25);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Typography - 纯系统字体 */
    --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Font Sizes */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-xxl: 24px;
    --font-size-xxxl: 32px;
    
    /* Font Weights */
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.25s ease-out;
    --transition-slow: 0.35s ease-out;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #1C1C1E;
        --bg-tertiary: #2C2C2E;
        --bg-grouped: #1C1C1E;
        
        --text-primary: #FFFFFF;
        --text-secondary: #EBEBF5;
        --text-tertiary: #EBEBF599;
        --text-quaternary: #EBEBF566;
        
        --border-primary: #38383A;
        --border-secondary: #2C2C2E;
    }
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-regular);
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-secondary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    font-display: swap;
}

/* 系统字体优化 */

/* Language Switcher */
.language-switcher {
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 1000;
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs);
    box-shadow: 0 4px 16px var(--shadow-light);
    border: 1px solid var(--border-secondary);
}

.lang-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.lang-btn:hover {
    background: var(--apple-gray-1);
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--apple-blue);
    color: white;
}

/* Main Container */
.main-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* App Header */
.app-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.app-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--apple-blue), var(--apple-purple));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    box-shadow: 0 8px 32px rgba(0, 122, 255, 0.3);
}

.app-icon i {
    font-size: 32px;
    color: white;
}

.app-title {
    font-size: var(--font-size-xxxl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.app-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: var(--font-weight-regular);
}

/* Input Section */
.input-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-box {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 16px var(--shadow-light);
    border: 1px solid var(--border-secondary);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.input-box:focus-within {
    box-shadow: 0 8px 32px var(--shadow-medium);
    border-color: var(--apple-blue);
}

#urlInput {
    width: 100%;
    padding: var(--spacing-lg) 140px var(--spacing-lg) 50px;
    border: none;
    background: transparent;
    font-size: var(--font-size-md);
    color: var(--text-primary);
    outline: none;
    font-weight: var(--font-weight-regular);
}

#urlInput::placeholder {
    color: var(--text-tertiary);
    font-weight: var(--font-weight-regular);
}

.input-icon {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: var(--font-size-lg);
    pointer-events: none;
}

.parse-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: var(--spacing-sm);
    bottom: var(--spacing-sm);
    padding: 0 var(--spacing-lg);
    background: linear-gradient(135deg, var(--apple-blue), var(--apple-purple));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-fast);
    min-width: 120px;
    justify-content: center;
}

.parse-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
}

.parse-btn:active {
    transform: translateY(0);
}

.parse-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Platforms Info */
.platforms-info {
    text-align: center;
}

.platforms-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
}

.platforms-description {
    font-size: var(--font-size-xs) !important;
    color: var(--text-tertiary) !important;
    font-weight: var(--font-weight-regular) !important;
    margin-bottom: var(--spacing-md) !important;
    line-height: 1.4;
}

/* 平台标签模块已移除 */

/* Loading State */
.loading {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.apple-loader {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.loader-circle {
    width: 12px;
    height: 12px;
    background: var(--apple-blue);
    border-radius: var(--radius-full);
    animation: apple-bounce 1.4s ease-in-out infinite both;
}

.loader-circle:nth-child(1) { animation-delay: -0.32s; }
.loader-circle:nth-child(2) { animation-delay: -0.16s; }

@keyframes apple-bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.loading-text {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* Content Box */
.content-box {
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.content-box.show {
    opacity: 1;
}

/* Media Card */
.media-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    box-shadow: 0 4px 16px var(--shadow-light);
    border: 1px solid var(--border-secondary);
    overflow: hidden;
}

.media-card h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.media-card h2 i {
    color: var(--apple-blue);
}

/* Video Styles */
.video-container {
    position: relative;
    padding-top: 56.25%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    background: var(--bg-tertiary);
}

video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* Image Styles */
.media-card img {
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 16px var(--shadow-light);
    transition: transform var(--transition-normal);
    max-width: 100%;
    height: auto;
}

.media-card img:hover {
    transform: scale(1.02);
}

/* Download Button */
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--apple-blue), var(--apple-purple));
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-fast);
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
    border: none;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
}

.download-btn:active {
    transform: translateY(0);
}

.download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Gallery Styles */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.image-index {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

/* Debug Info */
.debug-info {
    position: fixed;
    bottom: var(--spacing-sm);
    left: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-family: var(--font-family-mono);
    z-index: 9999;
    max-width: calc(100vw - 2 * var(--spacing-sm));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .app-title {
        font-size: var(--font-size-xxl);
    }
    
    .app-subtitle {
        font-size: var(--font-size-md);
    }
    
    .app-icon {
        width: 60px;
        height: 60px;
    }
    
    .app-icon i {
        font-size: 24px;
    }
    
    #urlInput {
        padding: var(--spacing-md) 120px var(--spacing-md) 45px;
        font-size: var(--font-size-sm);
    }
    
    .parse-btn {
        padding: 0 var(--spacing-md);
        font-size: var(--font-size-sm);
        min-width: 100px;
    }
    
    .language-switcher {
        top: var(--spacing-sm);
        left: var(--spacing-sm);
        padding: var(--spacing-xs);
    }
    
    .lang-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    /* 平台标签模块已移除 */
}

@media (max-width: 480px) {
    .main-container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .app-title {
        font-size: var(--font-size-xl);
    }
    
    .app-subtitle {
        font-size: var(--font-size-sm);
    }
    
    .media-card {
        padding: var(--spacing-lg);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .gallery-item img {
        height: 120px;
    }
    
    .friend-links-list {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .friend-link-item a {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .disclaimer-content {
        padding: var(--spacing-md);
        margin: 0 var(--spacing-sm);
    }
    
    .disclaimer-content p {
        font-size: var(--font-size-xs);
        margin-bottom: var(--spacing-sm);
    }
}

/* Friend Links */
.friend-links-section {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.friend-links-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.friend-links-title::before,
.friend-links-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-secondary);
}

.friend-links-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    padding: 0;
    margin: 0;
}

.friend-link-item {
    margin: 0;
}

.friend-link-item a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.friend-link-item a:hover {
    background: var(--apple-blue);
    color: white;
    border-color: var(--apple-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.friend-link-item a:active {
    transform: translateY(0);
}

/* Disclaimer */
.disclaimer-section {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.disclaimer-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.disclaimer-title::before,
.disclaimer-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-secondary);
}

.disclaimer-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-secondary);
    box-shadow: var(--shadow-sm);
    text-align: left;
    max-width: 800px;
    margin: 0 auto;
}

.disclaimer-content p {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-regular);
}

.disclaimer-content p:last-child {
    margin-bottom: 0;
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
button:focus-visible,
input:focus-visible,
.lang-btn:focus-visible {
    outline: 2px solid var(--apple-blue);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #000000;
        --border-secondary: #000000;
        --shadow-light: rgba(0, 0, 0, 0.3);
        --shadow-medium: rgba(0, 0, 0, 0.5);
    }
}

/* Navigation Tools */
.navigation-section {
    margin-top: var(--spacing-xl);
}

.navigation-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.navigation-title::before,
.navigation-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-secondary);
}

.navigation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.nav-item:hover {
    transform: translateY(-2px);
    border-color: var(--apple-blue);
    box-shadow: var(--shadow-md);
}

.nav-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--apple-blue), var(--apple-purple));
    color: #fff;
    flex-shrink: 0;
}

.nav-content h4 {
    margin: 0 0 4px 0;
    font-size: var(--font-size-md);
    color: var(--text-primary);
}

.nav-content p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}