/**
 * Sirio Design System - Design Tokens
 * 基于 INPS Sirio 设计系统的设计令牌
 * 版本: 1.0.0
 */

:root {
    /* ========== 色彩系统 (Colors) ========== */

    /* 主色调 - Sirio Blue */
    --color-primary: #2F6DD5;
    --color-primary-light: #5A8FE8;
    --color-primary-dark: #1E4D9A;
    --color-primary-darker: #0D2F5E;

    /* 主色调透明度变体 */
    --color-primary-alpha-10: rgba(47, 109, 213, 0.1);
    --color-primary-alpha-20: rgba(47, 109, 213, 0.2);
    --color-primary-alpha-50: rgba(47, 109, 213, 0.5);

    /* 中性色 */
    --color-gray-900: #454D56;
    --color-gray-800: #5C6470;
    --color-gray-700: #73798A;
    --color-gray-600: #8A90A3;
    --color-gray-500: #A1A7BD;
    --color-gray-400: #B8BED6;
    --color-gray-300: #CFD5F0;
    --color-gray-200: #E6EBFF;
    --color-gray-100: #F5F7FA;
    --color-gray-50: #FAFBFC;

    --color-white: #FFFFFF;
    --color-black: #000000;

    /* 语义色 */
    --color-success: #28A745;
    --color-success-light: #D4EDDA;
    --color-success-dark: #1E7E34;

    --color-warning: #FFC107;
    --color-warning-light: #FFF3CD;
    --color-warning-dark: #E0A800;

    --color-error: #DC3545;
    --color-error-light: #F8D7DA;
    --color-error-dark: #BD2130;

    --color-info: #17A2B8;
    --color-info-light: #D1ECF1;
    --color-info-dark: #117A8B;

    /* 背景色 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F7FA;
    --bg-tertiary: #E6EBFF;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    /* ========== 字体系统 (Typography) ========== */

    /* 字体族 */
    --font-primary: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Lora', Georgia, 'Times New Roman', serif;
    --font-mono: 'Courier New', Courier, monospace;

    /* 字体大小 */
    --font-size-xs: 0.75rem;
    /* 12px */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 1.875rem;
    /* 30px */
    --font-size-4xl: 2.25rem;
    /* 36px */
    --font-size-5xl: 3rem;
    /* 48px */

    /* 字重 */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* 行高 */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* 字间距 */
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;

    /* ========== 间距系统 (Spacing) ========== */
    /* 8px 基准 */
    --spacing-0: 0;
    --spacing-1: 0.25rem;
    /* 4px */
    --spacing-2: 0.5rem;
    /* 8px */
    --spacing-3: 0.75rem;
    /* 12px */
    --spacing-4: 1rem;
    /* 16px */
    --spacing-5: 1.25rem;
    /* 20px */
    --spacing-6: 1.5rem;
    /* 24px */
    --spacing-8: 2rem;
    /* 32px */
    --spacing-10: 2.5rem;
    /* 40px */
    --spacing-12: 3rem;
    /* 48px */
    --spacing-16: 4rem;
    /* 64px */
    --spacing-20: 5rem;
    /* 80px */

    /* ========== 圆角 (Border Radius) ========== */
    --radius-none: 0;
    --radius-sm: 0.125rem;
    /* 2px */
    --radius-base: 0.25rem;
    /* 4px */
    --radius-md: 0.375rem;
    /* 6px */
    --radius-lg: 0.5rem;
    /* 8px */
    --radius-xl: 0.75rem;
    /* 12px */
    --radius-2xl: 1rem;
    /* 16px */
    --radius-full: 9999px;

    /* ========== 边框 (Borders) ========== */
    --border-width-0: 0;
    --border-width-1: 1px;
    --border-width-2: 2px;
    --border-width-4: 4px;

    --border-color: var(--color-gray-300);
    --border-color-light: var(--color-gray-200);
    --border-color-dark: var(--color-gray-400);

    /* ========== 阴影 (Shadows) ========== */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-focus: 0 0 0 3px var(--color-primary-alpha-20);

    /* ========== 层级 (Z-Index) ========== */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* ========== 过渡动画 (Transitions) ========== */
    --duration-fast: 150ms;
    --duration-base: 200ms;
    --duration-slow: 300ms;
    --duration-slower: 500ms;

    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

    --transition-base: all var(--duration-base) var(--ease-in-out);
    --transition-colors: background-color var(--duration-base) var(--ease-in-out),
        border-color var(--duration-base) var(--ease-in-out),
        color var(--duration-base) var(--ease-in-out);
    --transition-shadow: box-shadow var(--duration-base) var(--ease-in-out);
    --transition-transform: transform var(--duration-base) var(--ease-in-out);

    /* ========== 断点 (Breakpoints) ========== */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;

    /* ========== 容器宽度 (Container Max Widths) ========== */
    --container-sm: 540px;
    --container-md: 720px;
    --container-lg: 960px;
    --container-xl: 1140px;
    --container-2xl: 1320px;
}

/* ========== 多主题配色系统 (Color Themes) ========== */

/* Sage Green 主题 - 默认 */
:root,
[data-color-theme="sage"] {
    --theme-primary: #4A7C59;
    --theme-primary-light: #6B9F7A;
    --theme-primary-dark: #3D5A47;
    --theme-sidebar-bg: #3D5A47;
    --theme-sidebar-text: #E8EFE8;
    --theme-sidebar-hover: rgba(107, 159, 122, 0.2);
    --theme-sidebar-active: rgba(107, 159, 122, 0.3);
    --theme-btn-bg: #6B9F7A;
    --theme-btn-text: #FFFFFF;
    --theme-main-bg: #F5F7F5;
    --theme-card-bg: #FFFFFF;
    --theme-text: #2D3B2D;
    --theme-text-secondary: #4A5C4A;
    --theme-border: #D4E0D4;
    --theme-accent: #4A7C59;
}

/* Rose 玫瑰红主题 */
[data-color-theme="rose"] {
    --theme-primary: #8B4557;
    --theme-primary-light: #C17B8A;
    --theme-primary-dark: #5A3F47;
    --theme-sidebar-bg: #5A3F47;
    --theme-sidebar-text: #F5E8EB;
    --theme-sidebar-hover: rgba(193, 123, 138, 0.2);
    --theme-sidebar-active: rgba(193, 123, 138, 0.3);
    --theme-btn-bg: #C17B8A;
    --theme-btn-text: #FFFFFF;
    --theme-main-bg: #FDF8F9;
    --theme-card-bg: #FFFFFF;
    --theme-text: #3D2B30;
    --theme-text-secondary: #5C4A50;
    --theme-border: #E8D4D8;
    --theme-accent: #8B4557;
}

/* Ocean Blue 海洋蓝主题 */
[data-color-theme="ocean"] {
    --theme-primary: #4A6FA5;
    --theme-primary-light: #7A9BC7;
    --theme-primary-dark: #3A4F6A;
    --theme-sidebar-bg: #3A4F6A;
    --theme-sidebar-text: #E8EEF5;
    --theme-sidebar-hover: rgba(122, 155, 199, 0.2);
    --theme-sidebar-active: rgba(122, 155, 199, 0.3);
    --theme-btn-bg: #7A9BC7;
    --theme-btn-text: #FFFFFF;
    --theme-main-bg: #F5F8FC;
    --theme-card-bg: #FFFFFF;
    --theme-text: #2D3545;
    --theme-text-secondary: #4A5565;
    --theme-border: #D4DEE8;
    --theme-accent: #4A6FA5;
}

/* Sith Dark 深邃暗黑主题 */
[data-color-theme="sith"] {
    --theme-primary: #8B3A4D;
    --theme-primary-light: #B85A6F;
    --theme-primary-dark: #5A2535;
    --theme-sidebar-bg: #1A1A1A;
    --theme-sidebar-text: #E5E5E5;
    --theme-sidebar-hover: rgba(139, 58, 77, 0.3);
    --theme-sidebar-active: rgba(139, 58, 77, 0.4);
    --theme-btn-bg: #3D3D3D;
    --theme-btn-text: #E5E5E5;
    --theme-main-bg: #0F0F0F;
    --theme-card-bg: #1A1A1A;
    --theme-text: #E5E5E5;
    --theme-text-secondary: #A3A3A3;
    --theme-border: #2A2A2A;
    --theme-accent: #8B3A4D;
}

/* ========== 基础样式重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-gray-900);
    background-color: var(--bg-primary);
}

/* ========== 可访问性 ========== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-2) var(--spacing-4);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* 焦点可见性 */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 屏幕阅读器专用 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}