/* CSS变量定义 */
:root {
    /* 浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --accent-color: #60a5fa;
    --accent-hover: #3b82f6;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏样式 */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.nav-brand i {
    font-size: 1.75rem;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
}

.nav-item {
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--accent-color);
    color: white;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 分享功能样式 */
.share-dropdown {
    position: relative;
    display: inline-block;
}

.share-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    font-weight: 500;
}

.share-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.share-btn i {
    font-size: 1rem;
    transition: all 0.2s ease;
}

.share-text {
    display: inline;
}

.share-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    min-width: 180px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.share-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.share-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.share-option:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.share-option i {
    width: 16px;
    text-align: center;
    font-size: 1rem;
}

.share-option[data-platform="twitter"] i {
    color: #1da1f2;
}

.share-option[data-platform="facebook"] i {
    color: #1877f2;
}

.share-option[data-platform="linkedin"] i {
    color: #0077b5;
}

.share-option[data-platform="whatsapp"] i {
    color: #25d366;
}

.share-option[data-platform="telegram"] i {
    color: #0088cc;
}

.share-option[data-platform="reddit"] i {
    color: #ff4500;
}

.share-option[data-platform="pinterest"] i {
    color: #bd081c;
}

.share-option[data-platform="email"] i {
    color: var(--text-secondary);
}

.bookmark-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    font-weight: 500;
}

.bookmark-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.bookmark-btn.bookmarked {
    color: var(--warning-color);
}

.bookmark-btn.bookmarked i {
    color: var(--warning-color);
}

.bookmark-btn i {
    font-size: 1rem;
    transition: all 0.2s ease;
}

.bookmark-text {
    display: inline;
}

.theme-toggle {
    padding: 0.5rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.game-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.game-link:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.game-link i {
    font-size: 1.1rem;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tab-panel {
    display: none;
    width: 100%;
    max-width: 600px;
}

.tab-panel.active {
    display: block;
}

/* 计时器容器 */
.timer-container {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.timer-display {
    text-align: center;
    margin-bottom: 2rem;
}

.time-display {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.separator {
    color: var(--text-muted);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.timer-label {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 控制按钮 */
.timer-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #d97706;
    transform: translateY(-1px);
}

/* 设置区域 */
.timer-settings, .pomodoro-settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-group label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.setting-group input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: border-color 0.2s ease;
}

.setting-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

/* 番茄钟进度条 */
.pomodoro-progress {
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 0.5rem;
    background-color: var(--bg-tertiary);
    border-radius: 0.25rem;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 0.25rem;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 计圈记录 */
.lap-times {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.lap-times h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.lap-list {
    max-height: 200px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.lap-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.lap-number {
    color: var(--text-secondary);
    font-weight: 500;
}

.lap-time {
    color: var(--text-primary);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
        position: sticky;
        top: 0;
        z-index: 100;
    }
    
    .nav-menu {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .nav-item {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
        min-width: auto;
        flex: 1;
    }
    
    .nav-controls {
        width: 100%;
        justify-content: center;
        gap: 1rem;
    }
    
    .main-content {
        padding: 1rem;
        padding-top: 2rem;
    }
    
    .timer-container {
        padding: 1.5rem;
        margin: 0;
    }
    
    .time-display {
        font-size: 3rem;
        word-break: break-all;
    }
    
    .timer-controls {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
    
    .btn {
        width: 100%;
        max-width: 200px;
        justify-content: center;
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
    
    .timer-settings, .pomodoro-settings {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .setting-group input {
        padding: 0.75rem;
        font-size: 1rem;
    }
    
    .notification {
        top: 1rem;
        right: 1rem;
        left: 1rem;
        transform: translateY(-100%);
        padding: 1rem;
    }
    
    .notification.show {
        transform: translateY(0);
    }
    
    /* 移动端优化 */
    body {
        -webkit-text-size-adjust: 100%;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* 触摸友好的按钮 */
    .btn, .nav-item, .theme-toggle {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* 防止双击缩放 */
    input, select, textarea {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .time-display {
        font-size: 2.5rem;
    }
    
    .timer-label {
        font-size: 1rem;
    }
    
    .nav-brand {
        font-size: 1.25rem;
    }
    
    .nav-brand i {
        font-size: 1.5rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-panel.active {
    animation: fadeIn 0.3s ease;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}