/* ===========================
   DESIGN TOKENS
   =========================== */

:root {
  /* — Color Palette (Dark Theme Default) — */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.6);
  --bg-card-hover: rgba(30, 30, 56, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-hover: rgba(255, 255, 255, 0.06);

  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-tertiary: #6a6a82;
  --text-inverse: #0a0a0f;

  /* Accent Colors */
  --accent-primary: #6c5ce7;
  --accent-primary-rgb: 108, 92, 231;
  --accent-secondary: #00cec9;
  --accent-secondary-rgb: 0, 206, 201;
  --accent-gradient: linear-gradient(135deg, #6c5ce7 0%, #a855f7 50%, #00cec9 100%);
  --accent-gradient-text: linear-gradient(135deg, #6c5ce7, #a855f7, #00cec9);
  --accent-glow: 0 0 20px rgba(108, 92, 231, 0.3);

  /* Semantic Colors */
  --success: #00b894;
  --warning: #fdcb6e;
  --error: #e17055;
  --info: #74b9ff;

  /* Category Colors */
  --cat-qa: #6c5ce7;
  --cat-ai: #00cec9;
  --cat-growth: #fdcb6e;
  --cat-career: #e17055;
  --cat-english: #74b9ff;

  /* — Typography — */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --fs-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --fs-sm: clamp(0.8rem, 0.75rem + 0.3vw, 0.9rem);
  --fs-base: clamp(0.9rem, 0.85rem + 0.35vw, 1rem);
  --fs-md: clamp(1rem, 0.9rem + 0.5vw, 1.15rem);
  --fs-lg: clamp(1.15rem, 1rem + 0.7vw, 1.4rem);
  --fs-xl: clamp(1.4rem, 1.1rem + 1.2vw, 2rem);
  --fs-2xl: clamp(1.8rem, 1.3rem + 2vw, 2.8rem);
  --fs-3xl: clamp(2.2rem, 1.5rem + 3vw, 3.8rem);

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  --lh-tight: 1.2;
  --lh-normal: 1.6;
  --lh-relaxed: 1.8;

  /* — Spacing (8px Grid) — */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */

  /* — Border Radius — */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* — Shadows — */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.15);

  /* — Borders — */
  --border-subtle: 1px solid rgba(255, 255, 255, 0.06);
  --border-light: 1px solid rgba(255, 255, 255, 0.1);
  --border-accent: 1px solid rgba(108, 92, 231, 0.3);

  /* — Transitions — */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* — Layout — */
  --container-max: 1200px;
  --container-narrow: 800px;
  --header-height: 72px;

  /* — Z-index — */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
}

/* ===========================
   LIGHT THEME
   =========================== */
[data-theme="light"] {
  --bg-primary: #f5f5fa;
  --bg-secondary: #eeeef5;
  --bg-tertiary: #e4e4ef;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --bg-glass-hover: rgba(255, 255, 255, 0.8);

  --text-primary: #1a1a2e;
  --text-secondary: #4a4a62;
  --text-tertiary: #8a8aa2;
  --text-inverse: #f5f5fa;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.1);

  --border-subtle: 1px solid rgba(0, 0, 0, 0.04);
  --border-light: 1px solid rgba(0, 0, 0, 0.08);
  --border-accent: 1px solid rgba(108, 92, 231, 0.2);
}