/* CSS变量 - 亮色主题（默认） */
:root {
    /* 主色调 — Digital Violet */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #818cf8;
    --primary-gradient: linear-gradient(135deg, #6366f1, #7c3aed);

    /* 玻璃拟态光晕色 — 中性化 */
    --glow-primary: rgba(99, 102, 241, 0.10);
    --glow-secondary: rgba(0, 0, 0, 0.06);
    --glow-accent: rgba(0, 0, 0, 0.04);
    --glow-teal: rgba(0, 0, 0, 0.04);

    /* 辅助色 */
    --secondary-color: #10b981;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;

    /* 背景色 — Neutral Gray */
    --bg-primary: #f9fafb;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    --bg-surface: rgba(255, 255, 255, 0.80);
    --bg-glass: rgba(255, 255, 255, 0.65);
    --bg-glass-strong: rgba(255, 255, 255, 0.92);
    --bg-glass-card: rgba(255, 255, 255, 0.70);
    --bg-glass-border: rgba(255, 255, 255, 0.90);
    
    /* 文本色 — Slate palette */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --text-muted: #94a3b8;

    /* 边框和分割线 — 中性灰 */
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(99, 102, 241, 0.30);
    --border-glass: rgba(255, 255, 255, 0.70);

    /* 阴影 — 中性阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.08);
    --shadow-glass: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-card-rest: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 8px 28px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.07);
    --shadow-floating: 0 16px 48px rgba(0, 0, 0, 0.14), 0 8px 20px rgba(0, 0, 0, 0.08);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    --radius-container: 24px;
    --radius-button: 12px;
    --radius-input: 12px;

    /* 动画 — Spring easing */
    --transition: background-color 0.3s cubic-bezier(0.25, 0.1, 0.25, 1), border-color 0.3s cubic-bezier(0.25, 0.1, 0.25, 1), box-shadow 0.3s cubic-bezier(0.25, 0.1, 0.25, 1), transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-micro: 250ms;
    --duration-layout: 400ms;
    
    /* 排版 */
    --font-primary: 'Inter', 'SF Pro Display', system-ui, sans-serif;
    
    /* 8px grid spacing */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-7: 56px;
    --space-8: 64px;
    
    /* 品牌色 */
    --indigo-500: #6366f1;
    --indigo-600: #4f46e5;
    
    /* 辅助色透明度版本 */
    --primary-10: rgba(99, 102, 241, 0.08);
    --primary-20: rgba(99, 102, 241, 0.15);
    --primary-30: rgba(99, 102, 241, 0.22);
    --primary-40: rgba(99, 102, 241, 0.3);
    
    --success-10: rgba(16, 185, 129, 0.1);
    
    --warning-15: rgba(245, 158, 11, 0.15);
    --warning-20: rgba(245, 158, 11, 0.2);
    --warning-25: rgba(245, 158, 11, 0.25);
    --warning-30: rgba(245, 158, 11, 0.3);
    --warning-40: rgba(245, 158, 11, 0.4);
    --warning-50: rgba(245, 158, 11, 0.5);
    
    --danger-30: rgba(239, 68, 68, 0.3);
    --danger-40: rgba(239, 68, 68, 0.4);
    --danger-70: rgba(239, 68, 68, 0.7);
    
    --neutral-shadow-sm: rgba(0, 0, 0, 0.05);
    --neutral-shadow-md: rgba(0, 0, 0, 0.1);
    --neutral-shadow-lg: rgba(0, 0, 0, 0.15);
    --neutral-shadow-20: rgba(0, 0, 0, 0.2);
    --neutral-shadow-30: rgba(0, 0, 0, 0.3);
    --neutral-shadow-40: rgba(0, 0, 0, 0.4);
    --neutral-shadow-50: rgba(0, 0, 0, 0.5);
    --neutral-shadow-85: rgba(0, 0, 0, 0.85);
    --neutral-shadow-95: rgba(0, 0, 0, 0.95);
    
    --indigo-30: rgba(99, 102, 241, 0.3);
    --indigo-40: rgba(99, 102, 241, 0.4);
    
    --white-20: rgba(255, 255, 255, 0.2);
    
    /* 基础颜色 */
    --white: #ffffff;
    --black: #000000;
    
    /* 遮罩背景 */
    --overlay-bg: rgba(0, 0, 0, 0.6);
    
    /* 代码块和日志区域 */
    --code-bg: #1e1e1e;
    --code-text: #d4d4d4;
    
    /* 主题切换按钮 */
    --theme-toggle-bg: var(--bg-tertiary);
    --theme-toggle-icon: var(--text-secondary);
    
    /* 警告/高亮颜色 */
    --warning-bg: #fef3c7;
    --warning-bg-light: #fde68a;
    --warning-bg-dark: #78350f;
    --warning-border: #fbbf24;
    --warning-text: #92400e;
    --warning-text-dark: #d97706;
    --warning-text-darker: #b45309;
    --warning-bg-alt: #fffbeb;
    
    /* 成功/健康颜色 */
    --success-bg: #d1fae5;
    --success-bg-light: #ecfdf5;
    --success-bg-alt: #f0fdf4;
    --success-text: #065f46;
    --success-text-light: #6ee7b7;
    
    /* 错误/危险颜色 */
    --danger-bg: #fee2e2;
    --danger-bg-light: #fef2f2;
    --danger-bg-alt: #fff5f5;
    --danger-bg-medium: #fed7d7;
    --danger-border: #fca5a5;
    --danger-border-light: #feb2b2;
    --danger-border-dark: #fecaca;
    --danger-text: #991b1b;
    --danger-text-light: #7f1d1d;
    --danger-text-dark: #742a2a;
    --danger-icon: #e53e3e;
    --danger-label: #c53030;
    --danger-alt: #dc3545;
    --danger-secondary: #fd7e14;
    
    /* 信息/蓝色颜色 */
    --info-bg: #dbeafe;
    --info-bg-light: #e0f2fe;
    --info-bg-lighter: #eff6ff;
    --info-bg-alt: #f0f9ff;
    --info-text: #1e40af;
    --info-text-dark: #0369a1;
    --info-text-darker: #075985;
    --info-border: #0ea5e9;
    --info-hover: #bae6fd;
    --info-color: #3b82f6;
    --info-color-dark: #2563eb;
    
    /* 中性灰色 */
    --neutral-100: #f8f9fa;
    --neutral-200: #e9ecef;
    --neutral-300: #dee2e6;
    --neutral-400: #adb5bd;
    --neutral-500: #6c757d;
    --neutral-600: #495057;
    --neutral-700: #2c3e50;
    --neutral-800: #8b95a5;
    --neutral-alt: #f1f3f4;
    
    /* 日志颜色 */
    --log-time: #858585;
    --log-info: #4ec9b0;
    --log-error: #f48771;
    --log-warn: #dcdcaa;
    
    /* 按钮颜色 */
    --btn-success: #10b981;
    --btn-success-secondary: #20c997;
    --btn-primary-hover: #4f46e5;
}

/* CSS变量 - 暗黑主题 */
[data-theme="dark"] {
    /* 主色调 — Same violet accent as light mode */
    --primary-color: #818cf8;
    --primary-hover: #a5b4fc;
    --primary-light: #c7d2fe;
    --primary-gradient: linear-gradient(135deg, #818cf8, #a78bfa);

    /* 玻璃拟态光晕色 — 暗色增强 */
    --glow-primary: rgba(129, 140, 248, 0.22);
    --glow-secondary: rgba(167, 139, 250, 0.16);
    --glow-accent: rgba(244, 114, 182, 0.12);
    --glow-teal: rgba(45, 212, 191, 0.10);

    --secondary-color: #34d399;
    --success-color: #34d399;
    --danger-color: #f87171;
    --warning-color: #fbbf24;
    --info-color: #60a5fa;

    /* 背景色 — Dark Glassmorphism+ */
    --bg-primary: #080c18;
    --bg-secondary: #0e1525;
    --bg-tertiary: #1a2540;
    --bg-surface: rgba(20, 30, 55, 0.75);
    --bg-glass: rgba(12, 18, 35, 0.70);
    --bg-glass-strong: rgba(12, 18, 35, 0.92);
    --bg-glass-card: rgba(20, 30, 55, 0.60);
    --bg-glass-border: rgba(129, 140, 248, 0.15);

    /* 文本色 — Slate palette (dark) */
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-muted: #64748b;

    /* 边框和分割线 — 玻璃拟态边框 */
    --border-color: rgba(129, 140, 248, 0.18);
    --border-hover: rgba(129, 140, 248, 0.35);
    --border-glass: rgba(129, 140, 248, 0.12);

    /* 阴影 — dark mode */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45), 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.50), 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.55), 0 8px 20px rgba(0, 0, 0, 0.3);
    --shadow-glass: 0 4px 24px rgba(0, 0, 0, 0.40), 0 1px 4px rgba(0, 0, 0, 0.2);
    --shadow-card-rest: 0 2px 8px rgba(0, 0, 0, 0.40), 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-card-hover: 0 8px 28px rgba(0, 0, 0, 0.50), 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-floating: 0 16px 48px rgba(0, 0, 0, 0.60), 0 8px 20px rgba(0, 0, 0, 0.3);
    
    /* 辅助色透明度版本 - 暗色 (violet-based) */
    --primary-10: rgba(99, 102, 241, 0.1);
    --primary-20: rgba(99, 102, 241, 0.18);
    --primary-30: rgba(99, 102, 241, 0.25);
    --primary-40: rgba(99, 102, 241, 0.35);
    
    --success-10: rgba(16, 185, 129, 0.1);
    
    --warning-15: rgba(245, 158, 11, 0.15);
    --warning-20: rgba(245, 158, 11, 0.2);
    --warning-25: rgba(245, 158, 11, 0.25);
    --warning-30: rgba(245, 158, 11, 0.3);
    --warning-40: rgba(245, 158, 11, 0.4);
    --warning-50: rgba(245, 158, 11, 0.5);
    
    --danger-30: rgba(239, 68, 68, 0.3);
    --danger-40: rgba(239, 68, 68, 0.4);
    --danger-70: rgba(239, 68, 68, 0.7);
    
    --neutral-shadow-sm: rgba(0, 0, 0, 0.2);
    --neutral-shadow-md: rgba(0, 0, 0, 0.3);
    --neutral-shadow-lg: rgba(0, 0, 0, 0.4);
    --neutral-shadow-20: rgba(0, 0, 0, 0.4);
    --neutral-shadow-30: rgba(0, 0, 0, 0.5);
    --neutral-shadow-40: rgba(0, 0, 0, 0.6);
    --neutral-shadow-50: rgba(0, 0, 0, 0.7);
    --neutral-shadow-85: rgba(0, 0, 0, 0.9);
    --neutral-shadow-95: rgba(0, 0, 0, 0.95);
    
    --indigo-30: rgba(99, 102, 241, 0.3);
    --indigo-40: rgba(99, 102, 241, 0.4);
    
    --white-20: rgba(255, 255, 255, 0.2);
    
    /* 品牌色 */
    --indigo-500: #6366f1;
    --indigo-600: #4f46e5;
    
    /* 基础颜色 */
    --white: #ffffff;
    --black: #000000;
    
    /* 遮罩背景 */
    --overlay-bg: rgba(0, 0, 0, 0.8);
    
    /* 代码块和日志区域 */
    --code-bg: #0d1117;
    --code-text: #e6edf3;
    
    /* 主题切换按钮 */
    --theme-toggle-bg: var(--bg-tertiary);
    --theme-toggle-icon: #fbbf24;
    
    /* 警告/高亮颜色 */
    --warning-bg: #78350f;
    --warning-bg-light: #92400e;
    --warning-bg-dark: #78350f;
    --warning-border: #b45309;
    --warning-text: #fef3c7;
    --warning-text-dark: #fde68a;
    --warning-text-darker: #fde68a;
    --warning-bg-alt: #78350f;
    
    /* 成功/健康颜色 */
    --success-bg: #064e3b;
    --success-bg-light: #065f46;
    --success-bg-alt: #064e3b;
    --success-text: #6ee7b7;
    --success-text-light: #6ee7b7;
    
    /* 错误/危险颜色 */
    --danger-bg: #7f1d1d;
    --danger-bg-light: #7f1d1d;
    --danger-bg-alt: #7f1d1d;
    --danger-bg-medium: #991b1b;
    --danger-border: #dc2626;
    --danger-border-light: #dc2626;
    --danger-border-dark: #dc2626;
    --danger-text: #fca5a5;
    --danger-text-light: #fecaca;
    --danger-text-dark: #fecaca;
    --danger-icon: #fca5a5;
    --danger-label: #fca5a5;
    --danger-alt: #dc2626;
    --danger-secondary: #dc2626;
    
    /* 信息/蓝色颜色 */
    --info-bg: #1e3a5f;
    --info-bg-light: #1e3a5f;
    --info-bg-lighter: #1e3a5f;
    --info-bg-alt: #1e3a5f;
    --info-text: #93c5fd;
    --info-text-dark: #93c5fd;
    --info-text-darker: #93c5fd;
    --info-border: #3b82f6;
    --info-hover: #1e3a5f;
    --info-color: #3b82f6;
    --info-color-dark: #3b82f6;
    
    /* 中性灰色 */
    --neutral-100: var(--bg-secondary);
    --neutral-200: var(--border-color);
    --neutral-300: var(--border-color);
    --neutral-400: var(--text-secondary);
    --neutral-500: var(--text-secondary);
    --neutral-600: var(--text-primary);
    --neutral-700: var(--text-primary);
    --neutral-800: var(--text-secondary);
    --neutral-alt: var(--bg-tertiary);
    
    /* 日志颜色 */
    --log-time: #858585;
    --log-info: #4ec9b0;
    --log-error: #f48771;
    --log-warn: #dcdcaa;
    
    /* 按钮颜色 */
    --btn-success: #10b981;
    --btn-success-secondary: #20c997;
    --btn-primary-hover: #818cf8;
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background: #f9fafb;
    background-image: none;
    color: var(--text-primary);
    line-height: 1.6;
    letter-spacing: -0.01em;
}

/* 滚动条美化 */
/* WebKit scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
    opacity: 0;
    transition: background 0.2s, opacity 0.4s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
    opacity: 1;
}

/* Auto-show scrollbar thumb while scrolling */
*:hover::-webkit-scrollbar-thumb,
*:active::-webkit-scrollbar-thumb,
*:focus::-webkit-scrollbar-thumb {
    opacity: 1;
}

/* Firefox scrollbar styling */
* {
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
}

/* Dark mode scrollbar */
[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
}

[data-theme="dark"] * {
    scrollbar-color: var(--text-secondary) transparent;
}

/* 容器 — sidebar fixed 72px，右侧 app-body 占满 */
.container {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
    padding: 16px 16px 16px 0;
    gap: 0;
}

/* 左侧 sidebar 占位（因为 sidebar 是 fixed，需要一个占位撑开空间） */
.container::before {
    content: '';
    width: 72px;
    flex-shrink: 0;
    transition: width 280ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

.container.sidebar-expanded::before {
    width: 220px;
}

/* 右侧主体区域 */
.app-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 32px);
    min-width: 0;
    overflow: hidden;
    background: #ffffff;
    border-radius: var(--radius-container, 24px);
    border: 1px solid rgba(0, 0, 0, 0.07);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
}

/* 主要内容区域（保留兼容旧代码） */
.main-content {
    display: flex;
    flex: 1;
    width: 100%;
    padding: 0;
    gap: 0;
}

/* 内容区域 */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow-x: hidden;
    background: transparent;
}

/* content 内部的 section 区域 */
.content-sections {
    flex: 1;
    padding: 1.75rem 2.25rem 2.25rem;
    overflow-y: auto;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.section h2 {
    font-size: clamp(18px, 2vw, 20px);
    font-weight: 600;
    margin-bottom: 1.8rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 按钮基础样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease,
                box-shadow 0.3s ease,
                background-color 0.3s ease,
                border-color 0.3s ease,
                opacity 0.3s ease;
    text-decoration: none;
    line-height: 1.25;
    letter-spacing: -0.005em;
}

.btn:active {
    transform: scale(0.97);
    transition-duration: 0.1s;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25), 0 1px 0 rgba(255, 255, 255, 0.15) inset;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4f46e5, #6d28d9);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35), 0 0 24px rgba(99, 102, 241, 0.18);
    transform: translateY(-1px);
}

.btn-secondary {
    background: #ffffff;
    color: var(--text-primary);
    border-color: rgba(0, 0, 0, 0.10);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25), 0 1px 0 rgba(255, 255, 255, 0.15) inset;
}

.btn-success:hover {
    filter: brightness(1.08);
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35), 0 0 20px rgba(16, 185, 129, 0.18);
    transform: translateY(-1px);
}

.btn-danger {
    background: #ffffff;
    color: var(--danger-color);
    border-color: rgba(239, 68, 68, 0.20);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.45);
    box-shadow: 0 0 16px rgba(239, 68, 68, 0.15);
}

.btn-small {
    padding: 8px 12px;
    font-size: 12px;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    transition: transform 0.3s ease,
                box-shadow 0.3s ease,
                background-color 0.3s ease,
                opacity 0.3s ease;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

/* 文本辅助类 */
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

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

/* 主题切换动画 */
body {
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark mode body background */
[data-theme="dark"] body {
    background: var(--bg-primary);
    background-image: none;
}

/* Dark mode app-body card */
[data-theme="dark"] .app-body {
    background: var(--bg-secondary, #0e1525);
    border-color: rgba(255, 255, 255, 0.06);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.4), 0 1px 4px rgba(0, 0, 0, 0.3);
}

.topbar, .sidebar, .content, .stat-card, .config-panel, .providers-container,
.routing-examples-panel, .system-info-panel, .upload-config-panel, .usage-panel,
.logs-container, .toast, .modal-content, .provider-modal-content {
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* 通用通知容器 */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 1.2rem 1.8rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.06);
    min-width: 300px;
    animation: slideIn 0.3s ease;
    pointer-events: auto;
}

.toast.success { border-left: 4px solid var(--success-color); }
.toast.error { border-left: 4px solid var(--danger-color); }

/* 复选框和单选框通用样式 */
.checkbox-item, .radio-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-input);
    font-size: 0.9rem;
    transition: border-color 0.3s ease,
                box-shadow 0.3s ease,
                background-color 0.3s ease;
    background: #ffffff;
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.10);
}

/* 主题切换按钮 */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: #ffffff;
    border-color: rgba(0, 0, 0, 0.10);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.125rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    border-color: rgba(99, 102, 241, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: inline-block; }
[data-theme="dark"] .theme-toggle .fa-sun { display: inline-block; }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }

/* 语言切换器通用部分 */
.language-switcher {
    position: relative;
    display: inline-block;
}

.language-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: #ffffff;
    color: var(--text-secondary);
    border: 1px solid rgba(0, 0, 0, 0.10);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.language-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
    border-color: rgba(99, 102, 241, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 0.75rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.06);
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: transform 0.3s ease,
                opacity 0.3s ease,
                visibility 0.3s ease;
    z-index: 1000;
}

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

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.9rem 1.2rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.language-option:hover {
    background: var(--bg-secondary);
}

.language-option.active i {
    opacity: 1;
}

.language-option i {
    font-size: 0.875rem;
    color: var(--primary-color);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.status-used {
    background: var(--success-bg);
    color: var(--success-text);
}

.status-unused {
    background: var(--warning-bg);
    color: var(--warning-text);
}

.status-invalid {
    background: var(--danger-bg);
    color: var(--danger-text);
}

.status-success { color: var(--success-color); }
.status-error { color: var(--danger-color); }

/* 响应式调整通用部分 */
@media (max-width: 767.98px) {
    .container {
        padding: 0;
    }

    .container::before {
        display: none;
    }

    .app-body {
        border-radius: 0;
        border: none;
        box-shadow: none;
        min-height: 100vh;
        background: var(--bg-primary);
    }

    [data-theme="dark"] .app-body {
        background: var(--bg-primary);
    }

    .content-sections {
        padding: 1rem 1rem 80px; /* bottom padding for mobile tab bar */
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ── Focus Indicators for Interactive Elements ── */
/* Accent-color ring for keyboard navigation (Requirements 15.2, 15.5) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible,
[tabindex]:not([tabindex="-1"]):focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Form inputs already use box-shadow as focus indicator via .form-control:focus
   and enhancements.css input:focus rules. Reinforce with accent ring on
   :focus-visible so keyboard users always see the indicator even when
   outline:none is set by component-level :focus rules. */
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px var(--primary-10);
}

/* Ensure text-muted is only used for non-essential labels (Requirement 15.3).
   Never apply .text-muted to critical information — only decorative captions,
   stat descriptions, and supplementary labels. */
.text-muted {
    color: var(--text-muted);
}

/* ── 通用面板 ── */
.routing-examples-panel,
.system-info-panel,
.upload-config-panel,
.usage-panel,
.config-panel,
.providers-container {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.07);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.routing-examples-panel::before,
.system-info-panel::before,
.upload-config-panel::before,
.usage-panel::before,
.config-panel::before,
.providers-container::before {
    content: none;
}

[data-theme="dark"] .routing-examples-panel,
[data-theme="dark"] .system-info-panel,
[data-theme="dark"] .upload-config-panel,
[data-theme="dark"] .usage-panel,
[data-theme="dark"] .config-panel,
[data-theme="dark"] .providers-container {
    background: var(--bg-secondary, #0e1525);
    border-color: rgba(255, 255, 255, 0.06);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}