/* Histor Labs, historlabs.eu. Tokens and rules from docs/DESIGN_SYSTEM.md. */
@font-face {
  font-family: "Grotesk"; font-style: normal; font-weight: 100 900;
  font-display: swap; src: url("fonts/inter-var.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 400;
  font-display: swap; src: url("fonts/jetbrains-mono-400.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 500 600;
  font-display: swap; src: url("fonts/jetbrains-mono-500.woff2") format("woff2");
}

:root {
  color-scheme: light;
  --paper: #F3F5F8;
  --ink: #0F1B2D;
  --ink-2: #4A5870;
  --ink-3: #5E6B80;
  --rule: #E1E5EB;
  --vault: #0B1F3A;
  --vault-head: #FFFFFF;
  --vault-text: #B4C0D3;
  --vault-label: #8C9BB3;
  --link: #2A62C4;
  --focus: #3D7BE6;
  --sans: "Grotesk", "Inter", "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --u: 8px;
  --gut: clamp(16px, 1.67vw, 24px);
  --margin: clamp(16px, 2.5vw, 36px);
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #0D1522;
    --ink: #E6EAF0;
    --ink-2: #A7B2C3;
    --ink-3: #8C98AB;
    --rule: #223047;
    --vault: #06111F;
      --vault-head: #E6EAF0;
    --vault-text: #A7B2C3;
    --vault-label: #8C98AB;
        --link: #7EAAF2;
    --focus: #7EAAF2;
  }
}

* { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 450;
  line-height: 1.55;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
p { margin: 0; }
a { color: var(--link); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.mono, code { font-family: var(--mono); font-size: 0.875em; font-weight: 400; letter-spacing: 0; }
.skip {
  position: absolute; left: var(--margin); top: -100px;
  background: var(--vault); color: var(--vault-head); padding: 8px 16px;
}
.skip:focus { top: 8px; }

/* One grid: twelve columns from 960, one column below. */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gut);
  max-width: 1440px;
  margin: 0 auto;
  padding-inline: var(--margin);
}
.grid > * { grid-column: 1 / -1; }
@media (min-width: 960px) {
  .head { grid-column: 1 / 5; }
  .body { grid-column: 5 / 13; }
}

.label {
  font-size: 12px;
  font-weight: 580;
  color: var(--ink-3);
  letter-spacing: 0;
}
h1, h2, h3 { margin: 0; font-weight: 580; letter-spacing: -0.02em; text-wrap: balance; }
h2 { font-size: 24px; line-height: 1.25; }
h3 { font-size: 16px; line-height: 1.4; text-wrap: pretty; }

/* Bar */
.bar {
  padding-block: 24px;
  border-bottom: 1px solid var(--rule);
  align-items: center;
}
.bar > div { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.wordmark {
  display: inline-flex; align-items: center; gap: 12px;
  color: var(--ink); text-decoration: none; font-weight: 580; font-size: 16px;
}
.wordmark svg { display: block; }
.bar nav { display: flex; gap: 24px; font-size: 14px; }
.bar nav a { color: var(--ink-2); text-decoration: none; }
.bar nav a:hover { color: var(--ink); text-decoration: underline; }

/* Top */
.top { padding-block: 80px 64px; row-gap: 32px; }
.top .label { margin-bottom: -8px; }
h1 {
  font-size: 64px;
  line-height: 1;
  font-weight: 780;
  letter-spacing: -0.035em;
}
.thesis {
  font-size: 24px;
  line-height: 1.35;
  font-weight: 450;
  letter-spacing: -0.02em;
  max-width: 34ch;
  grid-column: 1 / -1;
}
@media (min-width: 960px) { .thesis { grid-column: 1 / 10; } }
.name-note { color: var(--ink-2); max-width: 62ch; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; }
.button {
  display: inline-flex; align-items: center; gap: 12px;
  min-height: 40px; padding: 0 20px;
  background: var(--vault); color: var(--vault-head);
  font-size: 14px; font-weight: 580; text-decoration: none;
}
.button:hover { text-decoration: underline; }
@media (prefers-color-scheme: dark) { .band { border-block: 1px solid var(--rule); } .button { background: var(--ink); color: var(--paper); } }
.demo-link { font-size: 14px; font-weight: 580; }
.contact-line { font-size: 14px; color: var(--ink-2); }
.contact-line .mono { color: var(--ink); user-select: all; }

/* Parts: head on columns 1-4, content on 5-12, a rule above. */
.part { padding-block: 64px; border-top: 1px solid var(--rule); row-gap: 24px; }
.head .label { margin-bottom: 8px; }
.head p.sub { margin-top: 12px; color: var(--ink-2); max-width: 40ch; }
.prose p { max-width: 62ch; }
.prose p + p { margin-top: 16px; }

/* Sequence */
ol.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
ol.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: var(--gut);
  padding-block: 20px;
  border-top: 1px solid var(--rule);
}
ol.steps li:last-child { border-bottom: 1px solid var(--rule); }
ol.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-3);
  padding-top: 2px;
  font-variant-numeric: tabular-nums;
}
ol.steps p { color: var(--ink-2); margin-top: 4px; max-width: 62ch; }

/* The film: the one dark mass */
.band { background: var(--vault); color: var(--vault-text); padding-block: 64px; }
.band .label { color: var(--vault-label); }
.band h2 { color: var(--vault-head); }
.band .head p.sub { color: var(--vault-text); }
.band video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  background: #000;
}
.band .meta {
  display: flex; flex-wrap: wrap; gap: 8px 24px;
  margin-top: 16px; font-size: 14px; color: var(--vault-label);
}
.band a { color: #9EC0F7; }

/* Who it's for: ruled rows */
dl.rows { margin: 0; }
dl.rows > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: 4px;
  padding-block: 20px;
  border-top: 1px solid var(--rule);
}
dl.rows > div:last-child { border-bottom: 1px solid var(--rule); }
@media (min-width: 720px) {
  dl.rows > div { grid-template-columns: minmax(0, 3fr) minmax(0, 5fr); column-gap: var(--gut); }
}
dl.rows dt { font-weight: 580; }
dl.rows dd { margin: 0; color: var(--ink-2); max-width: 56ch; }

.offer { margin-top: 32px; }
.offer h3 { margin-bottom: 8px; }
.offer ul { margin: 0; padding-left: 1.2em; color: var(--ink-2); }
.offer li + li { margin-top: 4px; }

/* Footer */
footer { border-top: 1px solid var(--rule); padding-block: 48px 64px; row-gap: 32px; font-size: 14px; color: var(--ink-2); }
footer h2 { font-size: 14px; line-height: 1.4; color: var(--ink); margin-bottom: 8px; }
footer p + p { margin-top: 8px; }
footer .base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; color: var(--ink-3); padding-top: 24px; border-top: 1px solid var(--rule); }

@media (max-width: 599px) {
  h1 { font-size: 52px; }
  .thesis { font-size: 20px; }
  .top { padding-block: 48px 48px; }
  .part, .band { padding-block: 48px; }
  .bar nav { gap: 16px; }
}