/* Kaika Lab — shared styles.
   Serif throughout: these are documents people read, not an interface. */

:root {
  --ink: #1a1a1f;
  --ink-2: #4c4c57;
  --ink-3: #7d7d8a;
  --bg: #fdfdfc;
  --surface: #ffffff;
  --rule: #e4e3e0;
  --rule-2: #c9c7c2;
  --accent: #5b2d4f;
  --accent-soft: #f6eff4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eceaea;
    --ink-2: #b0adb3;
    --ink-3: #807d85;
    --bg: #17161a;
    --surface: #1e1d22;
    --rule: #2e2c33;
    --rule-2: #454149;
    --accent: #d89bc4;
    --accent-soft: #2a1f28;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Source Serif 4', Georgia, 'Hiragino Mincho ProN', serif;
  font-size: 18px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 680px; margin: 0 auto; padding: 0 24px 96px; }

header.site {
  border-bottom: 1px solid var(--rule);
  margin-bottom: 56px;
}
header.site .wrap {
  padding-top: 28px;
  padding-bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
}
header.site a.brand {
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
header.site nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-size: 14.5px;
}
header.site nav a { color: var(--ink-2); text-decoration: none; }
header.site nav a:hover { color: var(--accent); }

h1 {
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.22;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  text-wrap: balance;
}
h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 48px 0 14px;
  text-wrap: balance;
}
h3 { font-size: 18px; font-weight: 600; margin: 32px 0 10px; }

p { margin: 0 0 18px; }
.lede { font-size: 20px; color: var(--ink-2); }

.updated {
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-size: 13.5px;
  color: var(--ink-3);
  margin: 0 0 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}

a { color: var(--accent); text-decoration: underline; text-decoration-color: var(--rule-2); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

ul, ol { margin: 0 0 18px; padding-left: 26px; }
li { margin-bottom: 8px; }

strong { font-weight: 600; }

.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  padding: 18px 22px;
  margin: 28px 0;
}
.note p { margin-bottom: 12px; font-size: 17px; }
.note p:last-child { margin-bottom: 0; }

.scroll { overflow-x: auto; margin: 0 0 24px; }
table { border-collapse: collapse; width: 100%; min-width: 440px; font-size: 16px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; line-height: 1.6; }
thead th {
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}
tbody tr:last-child td { border-bottom: none; }

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 72px;
}
footer.site .wrap {
  padding-top: 26px;
  padding-bottom: 48px;
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-size: 14px;
  color: var(--ink-3);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
footer.site a { color: var(--ink-2); }

.cta {
  display: inline-block;
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-size: 16px;
  font-weight: 600;
  padding: 12px 22px;
  background: var(--accent);
  color: #fff;
  border-radius: 5px;
  text-decoration: none;
  margin: 8px 0 12px;
}
@media (prefers-color-scheme: dark) {
  .cta { color: #17161a; }
}

@media (max-width: 600px) {
  body { font-size: 17px; }
  .wrap { padding: 0 18px 72px; }
  header.site nav { margin-left: 0; width: 100%; }
}