@layer reset, base, components, utilities;

:root {
  /* Insets */
  --safe-inset-top: env(safe-area-inset-top, 0px);
  --safe-inset-right: env(safe-area-inset-right, 0px);
  --safe-inset-bottom: env(safe-area-inset-bottom, 0px);
  --safe-inset-left: env(safe-area-inset-left, 0px);

  /* Spacing */
  --inline-space: 1ch;
  --inline-space-half: calc(var(--inline-space) / 2);
  --inline-space-double: calc(var(--inline-space) * 2);
  --block-space: 1rem;
  --block-space-half: calc(var(--block-space) / 2);
  --block-space-double: calc(var(--block-space) * 2);

  /* Text */
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --text-x-small: 0.75rem;
  --text-small: 0.85rem;
  --text-normal: 1rem;
  --text-medium: 1.1rem;
  --text-large: 1.5rem;
  --text-x-large: 1.8rem;
  --text-xx-large: 2.5rem;

  @media (max-width: 639px) {
    --text-x-small: 0.85rem;
    --text-small: 0.95rem;
    --text-normal: 1.1rem;
    --text-medium: 1.2rem;
  }

  /* Borders */
  --border: 1px solid var(--color-ink-lighter);
  --radius: 0;

  /* Shadows */
  --shadow: 0 0 0 1px oklch(var(--lch-black) / 5%),
            0 0.2em 0.2em oklch(var(--lch-black) / 5%),
            0 0.4em 0.4em oklch(var(--lch-black) / 5%),
            0 0.8em 0.8em oklch(var(--lch-black) / 5%);

  /* Focus rings for keyboard navigation */
  --focus-ring-color: var(--color-link);
  --focus-ring-offset: 1px;
  --focus-ring-size: 2px;

  /* Layout */
  --main-padding: clamp(var(--inline-space), 3vw, calc(var(--inline-space) * 3));
  --bar-height: 3rem;
  --bar-add-size: 3.5rem;

  /* Z-index */
  --z-bar: 10;
  --z-nav: 20;
  --z-flash: 30;

  /* OKLCH colors: Fixed */
  --lch-black: 0% 0 0;
  --lch-white: 100% 0 0;

  /* OKLCH colors: Light mode */
  --lch-canvas: var(--lch-white);
  --lch-ink-inverted: var(--lch-white);

  --lch-ink-darkest: 26% 0.05 264;
  --lch-ink-darker: 40% 0.026 262;
  --lch-ink-dark: 56% 0.014 260;
  --lch-ink-medium: 66% 0.008 258;
  --lch-ink-light: 84% 0.005 256;
  --lch-ink-lighter: 92% 0.003 254;
  --lch-ink-lightest: 96% 0.002 252;

  --lch-red: 59% 0.19 38;
  --lch-green: 55% 0.162 147;
  --lch-blue: 57.02% 0.1895 260.46;
  --lch-blue-light: 84.04% 0.0719 255.29;
  --lch-blue-lighter: 92% 0.026 254;

  /* Colors: Named */
  --color-black: oklch(var(--lch-black));
  --color-white: oklch(var(--lch-white));

  --color-ink: oklch(var(--lch-ink-darkest));
  --color-ink-darker: oklch(var(--lch-ink-darker));
  --color-ink-dark: oklch(var(--lch-ink-dark));
  --color-ink-medium: oklch(var(--lch-ink-medium));
  --color-ink-light: oklch(var(--lch-ink-light));
  --color-ink-lighter: oklch(var(--lch-ink-lighter));
  --color-ink-lightest: oklch(var(--lch-ink-lightest));
  --color-ink-inverted: oklch(var(--lch-ink-inverted));

  /* Colors: Abstractions */
  --color-canvas: oklch(var(--lch-canvas));
  --color-negative: oklch(var(--lch-red));
  --color-positive: oklch(var(--lch-green));
  --color-link: oklch(var(--lch-blue));
  --color-selected: oklch(var(--lch-blue-lighter));
  --color-selected-dark: oklch(var(--lch-blue-light));

  /* Colors: Blueprint background */
  --color-blueprint: oklch(var(--lch-blue) / 5%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --lch-canvas: 20% 0.0195 232.58;
    --lch-ink-inverted: var(--lch-black);

    --lch-ink-darkest: 96.02% 0.0034 260;
    --lch-ink-darker: 86% 0.0061 260;
    --lch-ink-dark: 73.97% 0.009 260;
    --lch-ink-medium: 62% 0.0122 260;
    --lch-ink-light: 40% 0.0148 260;
    --lch-ink-lighter: 30% 0.0178 260;
    --lch-ink-lightest: 25% 0.0204 260;

    --lch-red: 73.95% 0.139 42;
    --lch-green: 73.99% 0.117 145;
    --lch-blue: 74% 0.1293 256;
    --lch-blue-light: 40% 0.094 260;
    --lch-blue-lighter: 30% 0.0452 262;

    --shadow: 0 0 0 1px oklch(var(--lch-black) / 0.42),
              0 0.2em 1.6em -0.8em oklch(var(--lch-black) / 0.6),
              0 0.4em 2.4em -1em oklch(var(--lch-black) / 0.7),
              0 0.8em 1.2em -1.6em oklch(var(--lch-black) / 0.9);
  }
}