/* ============================================================
   CSS CUSTOM PROPERTIES — Design Tokens
   ============================================================ */

:root {
  /* Typography */
  --font-body: 'General Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --content-max: 1400px;
}

/* ── Dark Theme ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg: #0a101c;
  --color-surface: #101827;
  --color-card: #172132;
  --color-card-hover: #1d2a3f;
  --color-border: rgba(139, 176, 220, 0.22);
  --color-border-subtle: rgba(139, 176, 220, 0.12);

  --color-text: #e6edf3;
  --color-text-secondary: #b0b8c4;
  --color-text-muted: #7d8590;
  --color-text-faint: #484f58;

  --color-accent: #56f2ff;
  --color-accent-hover: #8bf8ff;
  --color-accent-dim: rgba(86, 242, 255, 0.13);
  --color-accent-glow: rgba(86, 242, 255, 0.12);
  --color-neon-magenta: #d85cff;
  --color-neon-violet: #7d6cff;
  --color-neon-amber: #ffc978;

  --color-success: #22c55e;
  --color-success-dim: rgba(34, 197, 94, 0.12);
  --color-warning: #f59e0b;
  --color-warning-dim: rgba(245, 158, 11, 0.12);
  --color-error: #ef4444;
  --color-error-dim: rgba(239, 68, 68, 0.12);

  --color-chart-gradient-start: rgba(45, 212, 191, 0.3);
  --color-chart-gradient-end: rgba(45, 212, 191, 0.02);

  --shadow-card: 0 18px 60px rgba(0,0,0,0.30), inset 0 1px 0 rgba(255,255,255,0.055);
  --shadow-card-hover: 0 26px 90px rgba(0,0,0,0.42), 0 0 32px rgba(86,242,255,0.08);
  --shadow-dropdown: 0 8px 24px rgba(0,0,0,0.5);
}

/* ── Light Theme ────────────────────────────────────────────── */
[data-theme="light"] {
  --color-bg: #f0f2f5;
  --color-surface: #ffffff;
  --color-card: #ffffff;
  --color-card-hover: #f7f8fa;
  --color-border: #d8dce3;
  --color-border-subtle: #e8ecf0;

  --color-text: #1a1e26;
  --color-text-secondary: #3d4450;
  --color-text-muted: #6b7280;
  --color-text-faint: #9ca3af;

  --color-accent: #0d9488;
  --color-accent-hover: #0f766e;
  --color-accent-dim: rgba(13, 148, 136, 0.08);
  --color-accent-glow: rgba(13, 148, 136, 0.04);

  --color-success: #16a34a;
  --color-success-dim: rgba(22, 163, 74, 0.08);
  --color-warning: #d97706;
  --color-warning-dim: rgba(217, 119, 6, 0.08);
  --color-error: #dc2626;
  --color-error-dim: rgba(220, 38, 38, 0.08);

  --color-chart-gradient-start: rgba(13, 148, 136, 0.2);
  --color-chart-gradient-end: rgba(13, 148, 136, 0.01);

  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-dropdown: 0 8px 24px rgba(0,0,0,0.15);
}