/* ========================================
   iLink Design Tokens v7.4
   Unified Black, White & Gray Design System
   ======================================== */

:root {
  /* === Monochrome brand === */
  --primary: #282A2F;
  --primary-dark: #181A1E;
  --primary-light: #ECEDEF;
  --accent: #73757A;
  --secondary: #73757A;

  /* === Aliases (v7 layout CSS) === */
  --brand: var(--primary);
  --brand-deep: var(--primary-dark);
  --brand-soft: var(--primary-light);
  --brand-border: rgba(40, 42, 47, 0.12);
  --brand-ring: rgba(40, 42, 47, 0.10);
  --brand-glow: rgba(40, 42, 47, 0.08);
  --accent-violet: var(--accent);
  --success: #16A34A;
  --warning: #DC2626;
  --error: #DC2626;
  --danger: var(--error);
  --info: #52555C;

  /* === Accent link (muted gray) === */
  --color-link: var(--color-gray-600);
  --color-link-hover: var(--color-gray-700);
  --color-link-active: var(--color-black);
  --color-link-soft: rgba(0, 0, 0, 0.06);

  /* === Toast / inline feedback：暖白底，小面积低饱和语义色 === */
  --toast-surface: rgba(252, 252, 253, 0.98);
  --toast-success-bg: var(--toast-surface);
  --toast-success-border: #bbf7d0;
  --toast-success-icon-bg: #f0fdf4;
  --toast-success-icon: #16A34A;
  --toast-success-text: #282A2F;

  --toast-error-bg: var(--toast-surface);
  --toast-error-border: #fecaca;
  --toast-error-icon-bg: #fef2f2;
  --toast-error-icon: #DC2626;
  --toast-error-text: #282A2F;

  --toast-warning-bg: var(--toast-surface);
  --toast-warning-border: #fecaca;
  --toast-warning-icon-bg: #fef2f2;
  --toast-warning-icon: #DC2626;
  --toast-warning-text: #282A2F;

  --toast-info-bg: var(--toast-surface);
  --toast-info-border: #e5e5e7;
  --toast-info-icon-bg: #f1f1f2;
  --toast-info-icon: #52555C;
  --toast-info-text: #282A2F;

  /* === Compatibility Color Tokens === */
  --color-black: #282A2F;
  --color-dark: #282A2F;
  --color-gray-700: #52555C;
  --color-gray-600: #63666D;
  --color-gray-500: #73757A;
  --color-gray-400: #A1A3A8;
  --color-gray-300: #D7D8DB;
  --color-gray-200: #E5E5E7;
  --color-gray-100: #F1F1F2;
  --color-gray-50: #F7F7F8;
  --color-white: #FCFCFD;
  --color-primary: var(--primary);
  --color-primary-light: #52555C;
  --color-primary-dark: var(--primary-dark);
  --color-success: var(--success);
  --color-success-light: #F0FDF4;
  --color-warning: var(--warning);
  --color-warning-light: #FEF2F2;
  --color-danger: var(--error);
  --color-danger-light: #FEF2F2;
  --color-info: var(--info);
  --color-info-light: #F3F4F6;

  /* === Text Colors === */
  --text-primary: var(--color-black);
  --text-secondary: var(--color-gray-600);
  --text-tertiary: var(--color-gray-400);
  --text-white: var(--color-white);
  --text-inverse: var(--color-white);
  --text-link: var(--color-link);
  --text-link-hover: var(--color-link-hover);

  /* === Background Colors === */
  --bg-body: #F7F7F8;
  --bg-light: #F7F7F8;
  --bg-gray: var(--color-gray-100);
  --bg-white: var(--color-white);
  --bg-surface: var(--color-white);
  --bg-surface-hover: var(--color-gray-100);
  --bg-muted: var(--color-gray-100);

  /* === Border Colors === */
  --border-light: var(--color-gray-200);
  --border-default: var(--color-gray-300);
  --border-dark: var(--color-gray-400);

  /* === Shadows - Subtle Depth === */
  --shadow-xs: 0 1px 2px rgba(40, 42, 47, 0.04);
  --shadow-sm: 0 1px 2px rgba(40, 42, 47, 0.06);
  --shadow-md: 0 4px 12px rgba(40, 42, 47, 0.08);
  --shadow-lg: 0 12px 24px rgba(40, 42, 47, 0.10);
  --shadow-xl: 0 20px 40px rgba(40, 42, 47, 0.12);
  --shadow-2xl: 0 28px 56px rgba(40, 42, 47, 0.14);

  /* === Soft Surface Tokens, kept for existing glass classes === */
  --glass-blur: 16px;
  --glass-saturate: 1.2;
  --glass-bg: rgba(252, 252, 253, 0.98);
  --glass-bg-light: rgba(252, 252, 253, 0.94);
  --glass-bg-strong: rgba(252, 252, 253, 1);
  --glass-border: rgba(40, 42, 47, 0.08);
  --glass-border-strong: rgba(40, 42, 47, 0.12);
  --glass-shadow: 0 4px 12px rgba(40, 42, 47, 0.08);
  --glass-highlight: rgba(252, 252, 253, 1);
  --glass-highlight-soft: rgba(252, 252, 253, 0.7);

  /* === Border Radius === */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 9999px;

  /* === Spacing === */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* === Page atmosphere (neutral gray) === */
  --bg-grid: none;
  --bg-mesh: none;

  /* === Typography === */
  /* display: 默认微软雅黑，古诗词标题页面单独指定宋体 */
  --font-display: "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
  --font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-family-en: "Times New Roman", serif;
  --font-family-code: "SF Mono", "Monaco", "Inconsolata", "Fira Code", Consolas, monospace;
  --font-sans: var(--font-family);
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
  --font-size-tiny: 10px;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  --font-size-5xl: 48px;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* === Transitions - Smooth & Refined === */
  --transition-fast: 120ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-normal: 240ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-slow: 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-bounce: var(--transition-normal);
  --transition-smooth: var(--transition-normal);

  /* === Z-Index === */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 10050;

  /* === Layout === */
  --header-height: 64px;
  --sidebar-width: 260px;
  --container-max: 1200px;
  --container-narrow: 960px;

  /* === Home-level tokens (warm editorial accent) === */
  --home-accent: #52555C;
  --home-accent-dark: #282A2F;
  --home-bg-warm: #F7F7F8;
  --home-text-secondary: #52555C;
  --home-text-muted: #73757A;
  --home-border: rgba(40, 42, 47, 0.08);
  --home-border-strong: rgba(40, 42, 47, 0.14);
  --home-radius: 16px;
  --home-radius-sm: 8px;
  --home-radius-pill: 100px;
  --transition-home: 700ms cubic-bezier(0.32, 0.72, 0, 1);
  --transition-fast-home: 350ms cubic-bezier(0.32, 0.72, 0, 1);
}

/* Dark mode support (optional) */
[data-theme="dark"] {
  --text-primary: var(--color-white);
  --text-secondary: var(--color-gray-300);
  --text-tertiary: var(--color-gray-500);
  --bg-body: #2A2A2A;
  --bg-light: #2A2A2A;
  --bg-white: #1A1A1A;
  --bg-surface: #1A1A1A;
  --bg-surface-hover: #333333;
  --bg-muted: #333333;
  --border-light: var(--color-gray-700);
  --border-default: var(--color-gray-600);
  --primary: #F9FAFB;
  --primary-dark: #FFFFFF;
  --primary-light: rgba(255, 255, 255, 0.08);
  --glass-bg: rgba(26, 26, 26, 0.96);
  --glass-bg-light: rgba(42, 42, 42, 0.98);
  --glass-bg-strong: #1A1A1A;
  --glass-border: rgba(64, 64, 64, 0.95);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}