/* ============================================================
   指路教育 — Design Tokens & CSS Custom Properties
   ============================================================ */

:root {
  /* ── Primary Palette (Blue-Purple / Indigo) ── */
  --color-primary-900: #1E1048;
  --color-primary-800: #2D1B5E;
  --color-primary-700: #3B2578;
  --color-primary-600: #4C3294;
  --color-primary-500: #5B44BA;
  --color-primary-400: #7B6DDE;
  --color-primary-300: #9E93EA;
  --color-primary-200: #C1B9F2;
  --color-primary-100: #E8E5FA;
  --color-primary-50:  #F5F3FD;

  /* ── Accent Palette (Warm Gold) ── */
  --color-accent-600: #C8963E;
  --color-accent-500: #D4A54C;
  --color-accent-400: #DCB56A;
  --color-accent-300: #E8CC92;
  --color-accent-200: #F0DEB9;
  --color-accent-100: #FBF3E3;
  --color-accent-50:  #FDFAF3;

  /* ── Neutral Palette ── */
  --color-neutral-900: #1A1A2E;
  --color-neutral-800: #2D2D44;
  --color-neutral-700: #4A4A5E;
  --color-neutral-600: #6B6B7E;
  --color-neutral-500: #8E8E9E;
  --color-neutral-400: #9CA3AF;
  --color-neutral-300: #BFC5CE;
  --color-neutral-200: #E5E7EB;
  --color-neutral-150: #EEF0F2;
  --color-neutral-100: #F3F4F6;
  --color-neutral-50:  #F9FAFB;
  --color-neutral-000: #FFFFFF;

  /* ── Semantic Colors ── */
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-error: #EF4444;
  --color-error-light: #FEE2E2;
  --color-info: #3B82F6;
  --color-info-light: #DBEAFE;

  /* ── Typography ── */
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB',
               system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Courier New', monospace;

  /* Type Scale (1.25 ratio) */
  --text-xs:   0.75rem;     /* 12px */
  --text-sm:   0.875rem;    /* 14px */
  --text-base: 1rem;        /* 16px */
  --text-lg:   1.125rem;    /* 18px */
  --text-xl:   1.25rem;     /* 20px */
  --text-2xl:  1.5rem;      /* 24px */
  --text-3xl:  1.875rem;    /* 30px */
  --text-4xl:  2.25rem;     /* 36px */
  --text-5xl:  3rem;        /* 48px */
  --text-6xl:  3.75rem;     /* 60px */

  /* Line Heights */
  --leading-tight:  1.25;
  --leading-snug:   1.4;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  --leading-loose:  2;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* ── Spacing Scale ── */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* ── Layout ── */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --header-height: 72px;

  /* ── Borders & Radius ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  --border-thin: 1px solid var(--color-neutral-200);
  --border-medium: 2px solid var(--color-neutral-200);

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.04);

  /* ── Transitions ── */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Z-Index Scale ── */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}