/* koipan — personal site. Warm-paper editorial aesthetic (shared with Koi). */
@import url('https://fonts.googleapis.com/css2?family=Schibsted+Grotesk:ital,wght@0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --bg:          #F2EDE2;   /* warm cream paper       */
  --surface:     #FAF7EF;
  --surface-2:   #ECE5D6;
  --ink:         #251F15;
  --muted:       #7B7163;
  --line:        #D9D1BD;
  --line-soft:   #E5DECC;
  --accent:      #BC4B27;   /* burnt orange / terracotta */
  --accent-deep: #9C3B1B;
  --olive:       #6B7250;   /* muted olive green      */
  --brown:       #8A6B4F;   /* soft brown earth       */
  --on-accent:   #FAF7EF;
  --sans: 'Schibsted Grotesk', 'Helvetica Neue', Helvetica, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', monospace;
}
[data-theme="dark"] {
  --bg:          #17130E;
  --surface:     #1F1A13;
  --surface-2:   #292217;
  --ink:         #EAE3D0;
  --muted:       #9D9380;
  --line:        #3A3324;
  --line-soft:   #2D281D;
  --accent:      #D8693F;
  --accent-deep: #E07F58;
  --olive:       #97A06F;
  --brown:       #B68F6A;
  --on-accent:   #17130E;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-deep); }
.wrap { max-width: 940px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }
.accent { color: var(--accent); }

/* ── Header ── */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand .dot {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--accent-deep);
}
.brand b { font-size: 18px; letter-spacing: -.01em; }
.head-nav { display: flex; align-items: center; gap: 22px; }
.head-nav a { color: var(--muted); font-size: 14px; }
.head-nav a:hover { color: var(--ink); }
.icon-btn {
  appearance: none; cursor: pointer; width: 34px; height: 34px;
  border: 1px solid var(--line); border-radius: 8px;
  background: transparent; color: var(--muted); font-size: 15px;
}
.icon-btn:hover { color: var(--ink); border-color: var(--ink); }

/* ── Hero ── */
.hero { padding: 76px 0 64px; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 1fr; gap: 40px; align-items: center; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.hero h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.05; letter-spacing: -.02em; margin: 16px 0 14px; }
.hero p { color: var(--muted); font-size: 18px; max-width: 38ch; margin: 0 0 26px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: 14px;
  padding: 11px 18px; border-radius: 9px; cursor: pointer;
  border: 1px solid var(--ink); background: transparent; color: var(--ink);
}
.btn:hover { background: var(--ink); color: var(--bg); }
.btn--accent { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn--accent:hover { background: var(--accent-deep); border-color: var(--accent-deep); color: var(--on-accent); }
.hero-art {
  width: 100%; height: auto; display: block;
  border-radius: 18px;
  box-shadow: 0 24px 46px -22px rgba(37, 31, 21, .42);
}
[data-theme="dark"] .hero-art { box-shadow: 0 24px 46px -20px rgba(0, 0, 0, .6); }

/* ── Sections ── */
.section { padding: 56px 0; border-top: 1px solid var(--line-soft); }
.section-head { margin-bottom: 30px; }
.section-head h2 { font-size: 26px; letter-spacing: -.01em; margin: 8px 0 6px; }
.section-head p { color: var(--muted); margin: 0; font-size: 15.5px; }

/* ── Lab categories ── */
.lab-cat { display: flex; align-items: center; gap: 14px; margin: 36px 0 16px; }
.lab-cat:first-of-type { margin-top: 0; }
.lab-cat .name { font-family: var(--mono); font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); white-space: nowrap; }
.lab-cat .rule { flex: 1; height: 1px; background: var(--line-soft); }
.lab-cat .count { font-family: var(--mono); font-size: 12px; color: var(--muted); }

/* ── Lab grid ── */
.lab-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.lab-card {
  display: block; padding: 22px 22px 20px; border: 1px solid var(--line);
  border-radius: 14px; background: var(--surface);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s;
}
.lab-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 22px 44px -28px rgba(37,31,21,.5); }
.lab-card .tag { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--olive); text-transform: uppercase; }
.lab-card h3 { margin: 10px 0 6px; font-size: 19px; color: var(--ink); }
.lab-card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.lab-card .ic { font-size: 26px; }
.lab-card.is-soon { opacity: .6; }
.lab-card.is-soon:hover { transform: none; border-color: var(--line); box-shadow: none; }

/* ── Links / about ── */
.links { display: flex; flex-wrap: wrap; gap: 12px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 15px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 14px; color: var(--ink); background: var(--surface);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

/* External / project links */
.ext-list { margin: 0 0 22px; }
.ext-link {
  display: flex; align-items: baseline; gap: 12px;
  padding: 13px 6px; border-top: 1px solid var(--line-soft);
  text-decoration: none; color: var(--ink);
}
.ext-list .ext-link:last-child { border-bottom: 1px solid var(--line-soft); }
.ext-link .nm { font-weight: 600; font-size: 16px; white-space: nowrap; }
.ext-link .ds { color: var(--muted); font-size: 14px; }
.ext-link .ar { margin-left: auto; color: var(--muted); font-size: 14px; }
.ext-link:hover .nm,
.ext-link:hover .ar { color: var(--accent); }
@media (max-width: 560px) {
  .ext-link { flex-wrap: wrap; gap: 2px 10px; }
}

/* ── Footer ── */
.site-foot { border-top: 1px solid var(--line); padding: 34px 0; color: var(--muted); font-size: 13.5px; }
.site-foot .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ── Reveal ── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 760px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { max-width: 360px; order: -1; }
  .lab-grid { grid-template-columns: 1fr; }
  .head-nav .nav-link { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none; opacity: 1; transform: none; }
  .lab-card { transition: none; }
}