/* Blog layout. Colors, type, space and shape come from tokens.css (synced from the brand repo). */

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

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; letter-spacing: var(--tracking-tight); line-height: var(--leading-tight); }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--color-accent); color: var(--color-on-accent); padding: var(--space-2) var(--space-4); z-index: 10; border-radius: var(--radius); }
.skip:focus { left: var(--space-4); top: var(--space-4); }

.page {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
  padding-block: var(--space-5) var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}
main { display: flex; flex-direction: column; gap: var(--space-10); min-width: 0; }

/* Shared bits */
.label { font-size: var(--text-xs); font-weight: 600; text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--color-muted); }
.label.sig { color: var(--color-accent); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: var(--text-sm); color: var(--color-muted); }
a.mono:hover { color: var(--color-ink); }
.row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.pill { display: inline-block; font-size: var(--text-xs); font-weight: 600; border-radius: var(--radius-pill); padding: 0.125rem 0.625rem; background: var(--color-accent-soft); color: var(--color-accent-strong); }
.pill.pop { background: var(--color-pop-soft); color: var(--color-pop); }
.pill.warn { background: var(--color-warn-soft); color: var(--color-warn); }
a.pill:hover { background: var(--color-accent); color: var(--color-on-accent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; align-self: flex-start;
  font: inherit; font-size: var(--text-base); font-weight: 600; cursor: pointer;
  background: var(--color-accent); color: var(--color-on-accent);
  border: 1px solid var(--color-accent); border-radius: var(--radius); padding: var(--space-2) var(--space-4);
}
.btn:hover { background: var(--color-accent-strong); border-color: var(--color-accent-strong); }
.btn.ghost { background: transparent; color: var(--color-ink); border-color: var(--color-line-strong); }
.btn.ghost:hover { background: var(--color-sunken); }
.box { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-3); }
.box h3 { font-size: var(--text-md); }
.box p { color: var(--color-muted); font-size: var(--text-base); }
.field { font: inherit; font-size: var(--text-base); color: var(--color-ink); background: var(--color-bg); border: 1px solid var(--color-line-strong); border-radius: var(--radius); padding: var(--space-2) var(--space-3); width: 100%; }
.field::placeholder { color: var(--color-muted); }
.box form { display: flex; flex-direction: column; gap: var(--space-2); }

/* Nav and footer */
.nav { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3) var(--space-6); padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-line); }
.brand { display: block; }
.logo { height: 1.75rem; width: auto; color: var(--color-ink); display: block; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-5); align-items: center; font-size: var(--text-base); }
.nav li a:not(.btn) { color: var(--color-muted); font-weight: 500; }
.nav li a:not(.btn):hover, .nav li a[aria-current] { color: var(--color-ink); }
.nav li a[aria-current] { box-shadow: 0 2px 0 var(--color-accent); }
.theme { font: inherit; font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); background: none; border: 1px solid var(--color-line-strong); border-radius: var(--radius-pill); padding: 0.125rem 0.75rem; cursor: pointer; min-width: 4.25rem; }
.theme:hover { color: var(--color-ink); }
.site-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); padding-top: var(--space-5); border-top: 1px solid var(--color-line); color: var(--color-muted); font-size: var(--text-sm); }
.site-foot a:hover { color: var(--color-ink); }
.site-foot code { font-family: var(--font-mono); font-size: var(--text-xs); }

/* Featured post */
.feature { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-2); }
.feature .art { background: var(--color-accent-soft); padding: var(--space-6); display: flex; flex-direction: column; justify-content: flex-end; gap: var(--space-4); min-height: 15rem; }
.feature .art .fig { background: none; border: 0; padding: 0; }
.feature .copy { padding: 1.75rem; display: flex; flex-direction: column; gap: var(--space-3); justify-content: center; min-width: 0; }
.feature h2 { font-size: var(--text-2xl); }
.feature h2 a:hover { color: var(--color-accent); }
.feature p { color: var(--color-muted); }

/* Timeline */
.tl-layout { display: grid; grid-template-columns: minmax(0, 1fr) 17rem; gap: var(--space-10); align-items: start; }
.sect-head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-6); }
.sect-head h2 { font-size: var(--text-lg); }
.week { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: var(--space-5); position: relative; padding-bottom: var(--space-8); }
.week::before { content: ""; position: absolute; left: 5.5rem; top: 0.5rem; bottom: 0; width: 1px; background: var(--color-line-strong); transform: translateX(0.625rem); }
.week:last-child { padding-bottom: 0; }
.week:last-child::before { bottom: 1rem; }
.wk { display: flex; flex-direction: column; gap: 0.125rem; padding-top: 0.125rem; }
.wk b { font-family: var(--font-mono); font-weight: 500; color: var(--color-ink); font-size: 0.9375rem; }
.items { display: flex; flex-direction: column; gap: var(--space-5); padding-left: var(--space-8); position: relative; min-width: 0; }
.items::before { content: ""; position: absolute; left: -0.125rem; top: 0.45rem; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 0 4px var(--color-bg); }
.week.current .items::before { background: var(--color-pop); }
.entry { display: flex; flex-direction: column; gap: 0.375rem; }
.entry h3 { font-size: 1.125rem; }
.entry h3 a:hover { color: var(--color-accent); }
.entry p { color: var(--color-muted); max-width: 34rem; }
.entry .meta { display: flex; gap: var(--space-3); flex-wrap: wrap; align-items: center; }
.side { display: flex; flex-direction: column; gap: var(--space-4); position: sticky; top: var(--space-4); }
.topic-list { display: flex; flex-direction: column; }
.topic-list a { display: flex; justify-content: space-between; gap: var(--space-2); padding: 0.375rem 0; border-bottom: 1px solid var(--color-line); color: var(--color-muted); font-size: var(--text-base); }
.topic-list a:last-child { border-bottom: 0; }
.topic-list a:hover { color: var(--color-ink); }

/* Archive, topic and plain pages */
.page-head { display: flex; flex-direction: column; gap: var(--space-2); max-width: 40rem; }
.page-head h1 { font-size: var(--text-2xl); }
.page-head p { color: var(--color-muted); }
.page-head a:not(.mono) { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; }
.archive { max-width: 46rem; }
.topic-post { padding-block: var(--space-5); border-top: 1px solid var(--color-line); }
.topic-post:last-child { border-bottom: 1px solid var(--color-line); }

/* Post */
.post { display: flex; flex-direction: column; gap: var(--space-6); max-width: 40rem; margin-inline: auto; width: 100%; }
.post-head { display: flex; flex-direction: column; gap: var(--space-4); }
.post-head h1 { font-size: var(--text-2xl); }
.crumbs { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.lede { font-size: var(--text-lg); color: var(--color-muted); line-height: 1.4; }
.next h3 a:hover { color: var(--color-accent); }
.next { background: var(--color-accent-soft); }

@media (max-width: 52rem) {
  .tl-layout { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; }
  .feature { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 34rem) {
  .week { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }
  .week::before { left: 0; transform: none; }
  .wk { flex-direction: row; gap: var(--space-2); align-items: baseline; padding-left: var(--space-6); }
  .items { padding-left: var(--space-6); }
  .items::before { left: -0.125rem; top: -1.125rem; }
}
@media (prefers-reduced-motion: no-preference) {
  .btn, .pill, .theme { transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease); }
}