Arctic theme

/* Arctic — a polar night: slate-blue ground, frost accent, built for the dark mode with a cool light mode beside it.
 *
 * After Vibra's palette (an original recipe (scripts/presets/sources.ts)), mapped onto every token
 * vibra.css defines and held to Vibra's contrast floors: where a value moved,
 * it moved the least it could — a fill that was too light to read as a word
 * is the same hue, deeper. The typefaces the original names are not carried;
 * a preset is colour, radius and elevation, and the face is the page's own.
 *
 * Generated by scripts/build-presets.ts. Edit scripts/presets/sources, not this file. */
[data-preset="arctic"] {
  --radius: 0.5rem;

  /* Planes. */
  --background: oklch(0.985 0.012 250);
  --surface: oklch(0.992 0.012 250);
  --card: oklch(1 0 0);
  --popover: oklch(1 0 0);
  --muted: oklch(0.955 0.012 250);
  --secondary: oklch(0.945 0.012 250);
  --accent: oklch(0.945 0.012 250);

  /* Ink. --faint-foreground is for eyebrows, meta and axis titles at 11px/600 and up — never body copy. */
  --foreground: oklch(0.2 0.02 260);
  --card-foreground: var(--foreground);
  --popover-foreground: var(--foreground);
  --muted-foreground: oklch(0.48 0.02 260);
  --faint-foreground: oklch(0.46 0.02 260);
  --secondary-foreground: var(--foreground);
  --accent-foreground: var(--foreground);

  /* The accent, and the aliases that carry it. */
  --brand: oklch(0.47 0.08 215);
  --brand-foreground: oklch(0.99 0.003 215);
  --brand-muted: oklch(0.93 0.036 215);
  --primary: var(--brand);
  --primary-foreground: var(--brand-foreground);
  --ring: var(--brand);

  /* Lines. --input is the field boundary, so it carries 3:1 against the page and a card. */
  --border: oklch(0.9 0.012 250);
  --rule: oklch(0.77 0.012 250);
  --input: oklch(0.64 0.012 250);
  --chart-grid: oklch(0.9 0.012 250);

  /* Semantic tones on opaque tints. */
  --success: oklch(0.5 0.14 150);
  --success-foreground: oklch(0.99 0.003 150);
  --success-muted: oklch(0.95 0.04 150);
  --warning: oklch(0.5 0.11 75);
  --warning-foreground: oklch(0.99 0.003 75);
  --warning-muted: oklch(0.95 0.04 75);
  --danger: oklch(0.5 0.2 25);
  --danger-foreground: oklch(0.99 0.003 25);
  --danger-muted: oklch(0.95 0.04 25);
  --info: oklch(0.5 0.14 250);
  --info-foreground: oklch(0.99 0.003 250);
  --info-muted: oklch(0.95 0.04 250);
  --destructive: var(--danger);

  /* Chart palette: the accent first when it is a colour, then the source's hues, then three of Vibra's own. */
  --chart-1: var(--brand);
  --chart-2: oklch(0.58 0.12 5);
  --chart-3: oklch(0.6 0.13 275);
  --chart-4: oklch(0.58 0.13 65);
  --chart-5: oklch(0.6 0.13 155);
  --chart-6: oklch(0.55 0.12 335);
  --chart-7: oklch(0.56 0.14 95);
  --chart-8: oklch(0.5 0.02 250);
  --chart-positive: var(--success);
  --chart-negative: var(--danger);
  --chart-neutral: var(--muted-foreground);
  --chart-axis: var(--muted-foreground);

  /* The sidebar sits one plane below the content it frames. */
  --sidebar: oklch(0.975 0.012 250);
  --sidebar-foreground: var(--foreground);
  --sidebar-primary: var(--brand);
  --sidebar-primary-foreground: var(--brand-foreground);
  --sidebar-accent: oklch(0.94 0.012 250);
  --sidebar-accent-foreground: var(--foreground);
  --sidebar-border: oklch(0.91 0.012 250);
  --sidebar-ring: var(--brand);

  /* Elevation. */
  --shadow-sheet: 0 1px 2px oklch(0.2 0.03 260 / 6%), 0 2px 6px -2px oklch(0.2 0.03 260 / 5%);
  --shadow-float: 0 8px 24px -8px oklch(0.2 0.03 260 / 22%), 0 1px 2px oklch(0.2 0.03 260 / 8%);
  --shadow-modal: 0 24px 48px -16px oklch(0.2 0.03 260 / 30%);
  --overlay: oklch(0 0 0 / 40%);
}

.dark [data-preset="arctic"],
[data-preset="arctic"].dark,
[data-preset="arctic"] .dark {
  /* Planes. */
  --background: oklch(0.22 0.018 250);
  --surface: oklch(0.245 0.018 250);
  --card: oklch(0.27 0.018 250);
  --popover: oklch(0.31 0.018 250);
  --muted: oklch(0.31 0.018 250);
  --secondary: oklch(0.34 0.018 250);
  --accent: oklch(0.34 0.018 250);

  /* Ink. --faint-foreground is for eyebrows, meta and axis titles at 11px/600 and up — never body copy. */
  --foreground: oklch(0.95 0.008 250);
  --card-foreground: var(--foreground);
  --popover-foreground: var(--foreground);
  --muted-foreground: oklch(0.71 0.012 250);
  --faint-foreground: oklch(0.71 0.012 250);
  --secondary-foreground: var(--foreground);
  --accent-foreground: var(--foreground);

  /* The accent, and the aliases that carry it. */
  --brand: oklch(0.78 0.09 215);
  --brand-foreground: oklch(0.18 0.03 215);
  --brand-muted: oklch(0.28 0.045 215);
  --primary: var(--brand);
  --primary-foreground: var(--brand-foreground);
  --ring: var(--brand);

  /* Lines. --input is the field boundary, so it carries 3:1 against the page and a card. */
  --border: oklch(0.37 0.018 250);
  --rule: oklch(0.46 0.018 250);
  --input: oklch(0.55 0.012 250);
  --chart-grid: oklch(0.39 0.018 250);

  /* Semantic tones on opaque tints. */
  --success: oklch(0.8 0.14 150);
  --success-foreground: oklch(0.16 0.03 150);
  --success-muted: oklch(0.3 0.04 150);
  --warning: oklch(0.8 0.11 85);
  --warning-foreground: oklch(0.16 0.03 85);
  --warning-muted: oklch(0.3 0.04 85);
  --danger: oklch(0.8 0.14 25);
  --danger-foreground: oklch(0.16 0.03 25);
  --danger-muted: oklch(0.3 0.04 25);
  --info: oklch(0.8 0.14 250);
  --info-foreground: oklch(0.16 0.03 250);
  --info-muted: oklch(0.3 0.04 250);
  --destructive: var(--danger);

  /* Chart palette: the accent first when it is a colour, then the source's hues, then three of Vibra's own. */
  --chart-1: var(--brand);
  --chart-2: oklch(0.76 0.12 5);
  --chart-3: oklch(0.78 0.11 275);
  --chart-4: oklch(0.76 0.12 65);
  --chart-5: oklch(0.78 0.12 155);
  --chart-6: oklch(0.76 0.11 335);
  --chart-7: oklch(0.74 0.12 95);
  --chart-8: oklch(0.72 0.02 250);
  --chart-positive: var(--success);
  --chart-negative: var(--danger);
  --chart-neutral: var(--muted-foreground);
  --chart-axis: var(--muted-foreground);

  /* The sidebar sits one plane below the content it frames. */
  --sidebar: oklch(0.22 0.018 250);
  --sidebar-foreground: var(--foreground);
  --sidebar-primary: var(--brand);
  --sidebar-primary-foreground: var(--brand-foreground);
  --sidebar-accent: oklch(0.3 0.018 250);
  --sidebar-accent-foreground: var(--foreground);
  --sidebar-border: oklch(0.37 0.018 250);
  --sidebar-ring: var(--brand);

  /* Elevation. */
  --shadow-sheet: inset 0 1px 0 oklch(1 0 0 / 5%);
  --shadow-float: 0 12px 32px -8px oklch(0 0 0 / 60%), inset 0 1px 0 oklch(1 0 0 / 6%);
  --shadow-modal: 0 24px 64px -12px oklch(0 0 0 / 70%);
  --overlay: oklch(0 0 0 / 60%);
}