/**
 * Apple Style Design System
 * 基于 Apple App Store 设计规范
 */

/* ============================================================
   1. CSS 变量定义
   ============================================================ */

:root {
    /* 主色调 - Apple Blue */
    --color-primary: #007aff;
    --color-primary-hover: #0066d6;
    --color-secondary: #5856d6;
    --color-success: #34c759;
    --color-warning: #ff9500;
    --color-danger: #ff3b30;

    /* 背景色 - 浅色主题 */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #e5e5e7;
    --color-bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* 文字颜色 */
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;

    /* 边框 */
    --color-border: #d2d2d7;
    --color-border-light: #e5e5e7;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.2);

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display",
        "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-md: 15px;
    --font-size-lg: 17px;
    --font-size-xl: 21px;
    --font-size-2xl: 28px;
    --font-size-3xl: 40px;

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* 深色主题 */
[data-theme="dark"] {
    --color-bg-primary: #1d1d1f;
    --color-bg-secondary: #2d2d2f;
    --color-bg-tertiary: #3d3d3f;
    --color-bg-gradient: linear-gradient(135deg, #434343 0%, #000000 100%);

    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #6e6e73;

    --color-border: #424245;
    --color-border-light: #3d3d3f;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.5);
}

/* ============================================================
   2. 重置样式
   ============================================================ */

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ============================================================
   3. 通用组件样式
   ============================================================ */

/* 返回按钮 */
.back-button {
    position: fixed;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--color-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 1000;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

[data-theme="dark"] .back-button {
    background: rgba(45, 45, 47, 0.8);
    border-color: var(--color-border);
}

.back-button:hover {
    background: var(--color-primary);
    color: white;
    transform: translateX(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================================
   开关切换样式
   ============================================================ */

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-switch.active {
    background: var(--color-success);
}

.toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch.active .toggle-slider {
    left: 22px;
}

/* 主题切换容器 */
.theme-toggle-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border-light);
    border-radius: 20px;
    z-index: 1000;
}

[data-theme="dark"] .theme-toggle-container {
    background: rgba(45, 45, 47, 0.9);
    border-color: var(--color-border);
}

.theme-icon {
    font-size: 16px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border-light);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .user-info {
    background: rgba(45, 45, 47, 0.9);
    border-color: var(--color-border);
}

.user-avatar {
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.user-name {
    font-size: 14px;
    color: var(--color-text-primary);
    font-weight: 500;
}

/* 用户下拉菜单 */
.user-bar {
    position: fixed;
    top: 76px;
    right: var(--spacing-lg);
    z-index: 1000;
}

.user-info {
    position: relative;
    cursor: pointer;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    min-width: 120px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border-light);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    overflow: hidden;
}

.user-info:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

[data-theme="dark"] .user-dropdown {
    background: rgba(45, 45, 47, 0.95);
    border-color: var(--color-border);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background 0.15s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background: var(--color-bg-secondary);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    color: var(--color-text-tertiary);
}

.dropdown-item.logout:hover {
    background: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
}

.dropdown-item.logout:hover i {
    color: #ff3b30;
}

/* 主按钮 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-md);
    font-weight: 600;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 次要按钮 */
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-md);
    font-weight: 600;
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 危险按钮 */
.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-md);
    font-weight: 600;
    background: var(--color-danger);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-danger:hover {
    background: #e6342b;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 卡片 */
.card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* 毛玻璃卡片 */
.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .card-glass {
    background: rgba(45, 45, 47, 0.7);
    border-color: rgba(255, 255, 255, 0.1);
}

/* ============================================================
   4. 页面动画
   ============================================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.animate-fade-in {
    animation: fadeIn var(--transition-normal);
}

.animate-fade-in-up {
    animation: fadeInUp var(--transition-normal);
}

/* ============================================================
   5. 页面标题
   ============================================================ */

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* ============================================================
   6. 移动端响应式样式
   ============================================================ */

@media (max-width: 768px) {

    /* 调整间距 */
    :root {
        --spacing-lg: 16px;
        --spacing-xl: 24px;
        --spacing-2xl: 32px;
    }

    /* 主题切换容器 - 移动端缩小 */
    .theme-toggle-container {
        top: 12px;
        right: 12px;
        padding: 6px 10px;
        gap: 6px;
    }

    .theme-icon {
        font-size: 14px;
    }

    .toggle-switch {
        width: 40px;
        height: 22px;
    }

    .toggle-slider {
        width: 18px;
        height: 18px;
    }

    .toggle-switch.active .toggle-slider {
        left: 20px;
    }

    /* 用户状态栏 - 移动端调整（在toggle下方） */
    .user-bar {
        top: 56px;
        right: 12px;
    }

    .user-info {
        padding: 4px 10px;
        gap: 6px;
    }

    .user-avatar {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }

    .user-name {
        font-size: 12px;
        max-width: 60px;
    }

    /* 下拉菜单 - 移动端适配 (点击显示) */
    .user-dropdown {
        min-width: 90px;
        max-width: 100px;
    }

    .dropdown-item {
        padding: 8px 12px;
        font-size: 12px;
    }

    /* 移动端点击显示下拉菜单 */
    .user-info.dropdown-open .user-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {

    /* 超小屏幕 */
    .theme-toggle-container {
        top: 8px;
        right: 8px;
        padding: 4px 8px;
    }

    .user-bar {
        top: 48px;
    }

    .user-name {
        display: none;
        /* 超小屏幕隐藏用户名，只显示头像 */
    }

    .user-info {
        padding: 4px;
        border-radius: 50%;
    }
}