:root {
  --color-molten-lava: #780000;
  --color-brick-red: #c1121f;
  --color-papaya-whip: #fdf0d5;
  --color-deep-space-blue: #003049;
  --color-steel-blue: #669bbc;
}

:root {
  /* Default theme is light unless overridden. */
  --color-bg: var(--color-papaya-whip);
  --color-surface: #fff7e8;
  --color-surface-strong: #ffe9c8;
  --color-border: color-mix(in oklab, var(--color-deep-space-blue) 28%, transparent);
  --color-border-soft: color-mix(in oklab, var(--color-deep-space-blue) 16%, transparent);
  --color-text-primary: var(--color-deep-space-blue);
  --color-text-muted: color-mix(in oklab, var(--color-deep-space-blue) 70%, white 30%);
  --color-accent: var(--color-brick-red);
  --color-accent-strong: var(--color-molten-lava);
  --color-success: #1f7a43;
  --color-danger: var(--color-brick-red);
  --color-warning: #9b5100;
}

:root[data-theme="light"] {
  --color-bg: var(--color-papaya-whip);
  --color-surface: #fff7e8;
  --color-surface-strong: #ffe9c8;
  --color-border: color-mix(in oklab, var(--color-deep-space-blue) 28%, transparent);
  --color-border-soft: color-mix(in oklab, var(--color-deep-space-blue) 16%, transparent);
  --color-text-primary: var(--color-deep-space-blue);
  --color-text-muted: color-mix(in oklab, var(--color-deep-space-blue) 70%, white 30%);
  --color-accent: var(--color-brick-red);
  --color-accent-strong: var(--color-molten-lava);
  --color-success: #1f7a43;
  --color-danger: var(--color-brick-red);
  --color-warning: #9b5100;
}

:root[data-theme="dark"] {
  --color-bg: #0f1820;
  --color-surface: #13202a;
  --color-surface-strong: #1a2a35;
  --color-border: color-mix(in oklab, var(--color-steel-blue) 35%, transparent);
  --color-border-soft: color-mix(in oklab, var(--color-steel-blue) 18%, transparent);
  --color-text-primary: #f5f8ff;
  --color-text-muted: color-mix(in oklab, #f5f8ff 74%, transparent);
  --color-accent: #e04a55;
  --color-accent-strong: #ff6a6f;
  --color-success: #4ab972;
  --color-danger: #ff7f88;
  --color-warning: #f2b05f;
}

:root {
  --font-family-base: "Inter", "Segoe UI", "SF Pro Text", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.8125rem;
  --font-size-md: 0.9375rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --line-height-tight: 1.2;
  --line-height-base: 1.45;
  --line-height-relaxed: 1.6;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --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;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-pill: 999px;

  --shadow-soft: 0 4px 12px color-mix(in oklab, var(--color-deep-space-blue) 8%, transparent);

  --container-width: 760px;
  --container-wide-width: 920px;
}