/* Digital Frameworks — Swiss poster grid system */

@font-face {
  font-family: "Schibsted Grotesk";
  src: url("/fonts/schibsted-grotesk.woff2") format("woff2");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}

:root {
  /* colour */
  --paper: #ffffff;
  --ink: #111111;
  --ink-soft: #4d4d4d;
  --signal: #d8231f;
  --on-signal: #ffffff;

  /* grid */
  --cols: 12;
  --margin: clamp(1.25rem, 3.2vw, 3.5rem);
  --gutter: clamp(0.75rem, 1.6vw, 1.5rem);
  --unit: 0.5rem;

  /* type */
  --face: "Schibsted Grotesk", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --size-small: 0.875rem;
  --size-body: 1.0625rem;
  --size-lead: clamp(1.125rem, 1.4vw, 1.375rem);
  --size-title: clamp(2.75rem, 7vw, 6rem);
  --size-mast: clamp(4rem, 11.2vw, 14rem);

  --rule: 1px solid var(--ink);

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f0f0f;
    --ink: #f1f1ee;
    --ink-soft: #ababa6;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { background: var(--paper); -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--face);
  font-size: var(--size-body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "kern", "liga";
  text-rendering: optimizeLegibility;
}

::selection { background: var(--signal); color: var(--on-signal); }

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}
a:hover { text-decoration-thickness: 2px; }
a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  text-decoration: none;
}
a[aria-current="page"] { font-weight: 700; text-decoration: none; }

.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  column-gap: var(--gutter);
  padding-inline: var(--margin);
}

/* ---------- home: the poster ---------- */

.poster {
  min-height: 100svh;
  grid-template-rows: auto 1fr auto;
}

.poster-field {
  grid-column: 10 / -1;
  grid-row: 1;
  background: var(--signal);
  margin-inline-end: calc(var(--margin) * -1);
  min-height: calc(var(--size-mast) * 1.86 + var(--margin));
}

.poster-name {
  grid-column: 1 / 10;
  grid-row: 1;
  align-self: end;
  margin: 0;
  padding-top: var(--margin);
  font-size: var(--size-mast);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.04em;
}
.poster-name span { display: block; }

.poster-line {
  grid-column: 10 / -1;
  grid-row: 2;
  margin: calc(var(--unit) * 3) 0 0;
  max-width: 22ch;
  font-size: var(--size-lead);
  line-height: 1.4;
  font-weight: 500;
  text-wrap: balance;
}

.poster-foot {
  grid-column: 1 / -1;
  grid-row: 3;
  display: grid;
  grid-template-columns: subgrid;
  border-top: var(--rule);
  padding-block: calc(var(--unit) * 2) calc(var(--unit) * 3);
  font-size: var(--size-small);
}

/* ---------- shared footer links ---------- */

.links {
  grid-column: 1 / 7;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--unit) * 1) calc(var(--unit) * 4);
  margin: 0;
  padding: 0;
  list-style: none;
}
.domain {
  grid-column: 10 / -1;
  margin: 0;
  color: var(--ink-soft);
}

/* ---------- reading pages ---------- */

.masthead {
  align-items: start;
  padding-top: var(--margin);
}
.masthead-name {
  grid-column: 1 / 10;
  font-size: var(--size-lead);
  font-weight: 800;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.masthead-name:hover { text-decoration: underline; }
.masthead-field {
  grid-column: 10 / -1;
  height: calc(var(--unit) * 7);
  margin-top: calc(var(--margin) * -1);
  margin-inline-end: calc(var(--margin) * -1);
  background: var(--signal);
}

.doc { row-gap: 0; padding-block: calc(var(--unit) * 12) calc(var(--unit) * 14); }

.doc-title {
  grid-column: 1 / -1;
  margin: 0;
  font-size: var(--size-title);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.doc-meta {
  grid-column: 4 / 11;
  margin: calc(var(--unit) * 4) 0 0;
  color: var(--ink-soft);
  font-size: var(--size-small);
}

.doc-section {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: subgrid;
  margin-top: calc(var(--unit) * 8);
  padding-top: calc(var(--unit) * 2);
  border-top: var(--rule);
}
.doc-section h2 {
  grid-column: 1 / 4;
  margin: 0;
  font-size: var(--size-body);
  font-weight: 700;
  line-height: 1.4;
}
.doc-section .body { grid-column: 4 / 11; max-width: 68ch; }
.doc-section .body > :first-child { margin-top: 0; }
.doc-section p, .doc-section ul { margin: 0 0 calc(var(--unit) * 2); }
.doc-section ul { padding-left: 1.1em; }
.doc-section li + li { margin-top: var(--unit); }
.doc-section li::marker { color: var(--signal); }
.lead { font-size: var(--size-lead); line-height: 1.45; }

code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
}

.foot {
  margin-inline: var(--margin);
  padding-inline: 0;
  border-top: var(--rule);
  padding-block: calc(var(--unit) * 2) calc(var(--unit) * 3);
  font-size: var(--size-small);
}

/* ---------- narrow screens ---------- */

@media (max-width: 760px) {
  :root { --size-mast: clamp(2.75rem, 14.6vw, 6.5rem); }

  .poster { grid-template-rows: auto auto 1fr auto; }
  .poster-field {
    grid-column: 1 / -1;
    grid-row: 1;
    min-height: 22svh;
    margin-inline: calc(var(--margin) * -1);
  }
  .poster-name { grid-column: 1 / -1; grid-row: 2; padding-top: calc(var(--unit) * 4); }
  .poster-line { grid-column: 1 / -1; grid-row: 3; margin-top: calc(var(--unit) * 3); }
  .poster-foot { grid-row: 4; }

  .links, .domain { grid-column: 1 / -1; }
  .domain { margin-top: calc(var(--unit) * 2); }

  .masthead-name { grid-column: 1 / 9; }
  .masthead-field { grid-column: 10 / -1; }

  .doc { padding-block: calc(var(--unit) * 8) calc(var(--unit) * 10); }
  .doc-meta, .doc-section h2, .doc-section .body { grid-column: 1 / -1; }
  .doc-section h2 { margin-bottom: calc(var(--unit) * 2); }
}