/* Tokens, reset and type. Palette and scales follow UNSLOP 1.6. */

:root {
  --paper: #F7F5F0;
  --paper-2: #EFECE4;
  --paper-3: #E5E1D6;
  --ink: #1A1A18;
  --ink-2: #4A4843;
  --ink-3: #6F6C64;
  --rule: #D9D5CB;
  --rule-strong: #1A1A18;
  --accent: #0B5CAD; /* unslop-ignore: Antibes blue, asked for by the owner, inside the banned hue band on purpose */
  --accent-ink: #FFFFFF;
  --focus: #1A1A18;
  --radius: 2px;

  /* Ledger steps, lightest to darkest. */
  --l0: #EFECE4;
  --l1: #CFCABD;
  --l2: #8F8B81;
  --l3: #4A4843;
  --l4: #1A1A18;

  --s1: 4px;
  --s2: 8px;
  --s3: 12px;
  --s4: 16px;
  --s5: 24px;
  --s6: 32px;
  --s7: 48px;
  --s8: 64px;
  --s9: 96px;
  --s10: 128px;

  --t12: 0.75rem;
  --t14: 0.875rem;
  --t16: 1rem;
  --t18: 1.125rem;
  --t21: 1.3125rem;
  --t24: 1.5rem;
  --t32: 2rem;
  --t40: 2.5rem;
  --t56: 3.5rem;

  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --fast: 120ms;
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #141412;
  --paper-2: #1E1D1A;
  --paper-3: #2A2925;
  --ink: #ECE9E1;
  --ink-2: #B5B1A7;
  --ink-3: #8F8B81;
  --rule: #34322E;
  --rule-strong: #ECE9E1;
  --accent: #6FB8F5;
  --accent-ink: #141412;
  --focus: #ECE9E1;
  --l0: #1E1D1A;
  --l1: #3A3833;
  --l2: #6F6C64;
  --l3: #B5B1A7;
  --l4: #ECE9E1;
  color-scheme: dark;
}

:root[data-theme="terminal"] {
  --paper: #0B0F0B;
  --paper-2: #121912;
  --paper-3: #1B251B;
  --ink: #B9F2A1;
  --ink-2: #8CC078;
  --ink-3: #6C9A5C;
  --rule: #24331F;
  --rule-strong: #B9F2A1;
  --accent: #5CC8FF;
  --accent-ink: #0B0F0B;
  --focus: #5CC8FF;
  --l0: #121912;
  --l1: #24401F;
  --l2: #3F7A33;
  --l3: #7CC463;
  --l4: #B9F2A1;
  --font-sans: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --font-serif: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: dark;
}

/* Azur: the sea off Antibes, sand for ink, the sun for accent. */
:root[data-theme="azur"] {
  --paper: #06324F;
  --paper-2: #0A3D60;
  --paper-3: #104A72;
  --ink: #F6EBD3;
  --ink-2: #C9D3D6;
  --ink-3: #9FB4BF;
  --rule: #1C5A85;
  --rule-strong: #F6EBD3;
  --accent: #FFD23F;
  --accent-ink: #06324F;
  --focus: #FFD23F;
  --l0: #0A3D60;
  --l1: #1F6190;
  --l2: #3F8FBF;
  --l3: #8CC6E4;
  --l4: #F6EBD3;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  box-shadow: none;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--t16);
  line-height: 1.5;
}

h1,
h2,
h3,
p,
ol,
ul,
dl,
dd,
figure {
  margin: 0;
}

ol,
ul {
  padding: 0;
  list-style: none;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.15;
  text-wrap: balance;
}

p {
  max-width: 66ch;
  text-wrap: pretty;
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

button,
input {
  font: inherit;
  color: inherit;
}

.button {
  min-height: 44px;
  padding: var(--s2) var(--s4);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-mono);
  font-size: var(--t14);
  cursor: pointer;
  transition: background-color var(--fast) ease-out, color var(--fast) ease-out, transform 180ms var(--spring), translate 320ms var(--spring);
}

.button:active {
  transform: scale(0.94, 0.9);
}

.button:hover {
  background: var(--ink);
  color: var(--paper);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.button.primary:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--t14);
  font-variant-numeric: tabular-nums;
}

.faint {
  color: var(--ink-2);
}

.skip {
  position: absolute;
  left: var(--s4);
  top: var(--s4);
  z-index: 11;
  padding: var(--s3) var(--s4);
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-300%);
}

.skip:focus {
  transform: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}