/* ============================================
   Design Tokens
   ============================================ */

:root {
  /* Colors — Light */
  --color-bg: #f5f6fa;
  --color-surface: #ffffff;
  --color-surface-alt: #f9fafb;
  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;
  --color-border: #e5e7eb;
  --color-border-light: #f0f1f5;

  --color-positive: #10b981;
  --color-positive-bg: rgba(16, 185, 129, 0.1);
  --color-negative: #ef4444;
  --color-negative-bg: rgba(239, 68, 68, 0.1);
  --color-accent: #6366f1;
  --color-accent-hover: #5558e6;
  --color-accent-bg: rgba(99, 102, 241, 0.08);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);

  --color-header-start: #6366f1;
  --color-header-mid: #818cf8;
  --color-header-end: #a78bfa;

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.6875rem;   /* 11px */
  --font-size-sm: 0.75rem;     /* 12px */
  --font-size-base: 0.875rem;  /* 14px */
  --font-size-md: 1rem;        /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.5rem;      /* 24px */
  --font-size-2xl: 2rem;       /* 32px */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;

  /* Border Radius */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 14px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 8px 32px rgba(0, 0, 0, 0.12);

  /* Layout */
  --nav-height: 60px;
  --header-height: auto;
  --max-width: 480px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark theme overrides */
[data-theme="dark"] {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-surface-alt: #22252f;
  --color-text: #f3f4f6;
  --color-text-secondary: #9ca3af;
  --color-text-tertiary: #6b7280;
  --color-border: #2d3040;
  --color-border-light: #252836;

  --color-positive-bg: rgba(16, 185, 129, 0.15);
  --color-negative-bg: rgba(239, 68, 68, 0.15);
  --color-accent-bg: rgba(99, 102, 241, 0.12);
  --color-warning-bg: rgba(245, 158, 11, 0.12);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.2), 0 4px 14px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 8px 32px rgba(0, 0, 0, 0.3);
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: background var(--transition-base), color var(--transition-base);
}