/* HIGenNTO project page — design system per scratch/storyboard/storyboard_website.md.
   Neutrals let the renders carry the color; one violet chrome accent (#784AE6);
   brand gradient blue -> purple -> magenta sampled from the task palette. */

:root {
  --bg: #ffffff;
  --bg-alt: #f4f5f7;
  --ink: #16181d;
  --muted: #5b6470;
  --border: #e3e6ea;
  --accent: #784ae6;
  --graphite: #17191c;
  --on-graphite: #e8eaed;
  --on-graphite-muted: #9aa1ab;
  --grad: linear-gradient(90deg, #255cde, #784ae6, #d9409e);
  --radius: 14px;
  --maxw: 1080px;
  --narrow: 760px;
  --wide: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono, code { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 0.92em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: var(--narrow); }
.container--wide { max-width: var(--wide); }

/* ===================== TOP BAR ===================== */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  overflow-x: auto; scrollbar-width: none;
}
.topbar::-webkit-scrollbar { display: none; }
/* width: max-content + auto margins: centered when it fits, scrollable when not */
.topbar__inner {
  display: flex; align-items: center; gap: 48px;
  height: 62px; width: max-content;
  margin: 0 auto; padding: 0 28px;
}
.topbar__brand {
  font-weight: 700; font-size: 1.12rem; white-space: nowrap;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.topbar__brand:hover { text-decoration: none; }
.topbar__links {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 30px;
}
.topbar__links a {
  white-space: nowrap;
  font-size: 0.97rem; font-weight: 500; color: var(--ink);
  transition: color 0.2s ease;
}
.topbar__links a:hover { color: var(--accent); text-decoration: none; }
.topbar__links a.active { color: var(--accent); }

.section, .hero { scroll-margin-top: 72px; }

/* ===================== HERO ===================== */
.hero {
  text-align: center;
  padding: 84px 0 52px;
  background:
    radial-gradient(900px 360px at 50% -10%, rgba(120, 74, 230, 0.10), transparent 70%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.wordmark {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 400;
  letter-spacing: 0;
  margin: 0 0 4px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subtitle {
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 500;
  line-height: 1.25;
  margin: 0 auto 18px;
  max-width: 880px;
}
.authors-placeholder { color: var(--muted); font-size: 1rem; margin: 0 0 26px; }

.links { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.links--left { justify-content: flex-start; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: #fff;
  font-weight: 600; font-size: 0.95rem;
  padding: 11px 22px; border-radius: 999px;
  transition: transform 0.15s ease, background 0.15s ease;
  cursor: pointer;
}
.btn:hover { background: var(--accent); text-decoration: none; transform: translateY(-2px); }
.btn--small { padding: 8px 16px; font-size: 0.88rem; }
.btn--disabled { background: #c6cad1; cursor: not-allowed; pointer-events: auto; }
.btn--disabled:hover { background: #c6cad1; transform: none; }
.btn .ico { font-size: 0.9em; line-height: 1; }

/* ===================== SECTIONS ===================== */
.section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section--graphite { background: var(--graphite); color: var(--on-graphite); }
.section--graphite h2 { color: var(--on-graphite); }
.section--graphite .sectionIntro, .section--graphite .pill-caption { color: var(--on-graphite-muted); }

.section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700; letter-spacing: -0.02em;
  text-align: center; margin: 0 0 28px;
}
.sectionIntro { text-align: center; color: var(--muted); max-width: 820px; margin: -12px auto 28px; font-size: 0.98rem; }

/* ===================== MEDIA ===================== */
.teaser, .mounted {
  width: 100%; display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #000;
  box-shadow: 0 20px 50px -28px rgba(0, 0, 0, 0.4);
}
img.mounted { background: #fff; }
.section--graphite .mounted { border-color: #2a2e35; }
.caption { color: var(--muted); font-size: 0.95rem; max-width: 860px; margin: 18px auto 0; text-align: center; }
.finePrint { font-size: 0.85em; opacity: 0.85; }
figure { margin: 0; }
figcaption { color: var(--muted); font-size: 0.95rem; margin-top: 14px; text-align: center; max-width: 920px; margin-inline: auto; }

/* ===================== CARDS ===================== */
.cards { display: grid; grid-template-columns: 1fr; gap: 20px; }
.card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 24px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -26px rgba(0, 0, 0, 0.35); }
.card__num { font-family: "JetBrains Mono", monospace; font-size: 0.85rem; color: var(--accent); margin-bottom: 10px; }
.card h3 { font-size: 1.1rem; margin: 0 0 8px; letter-spacing: -0.01em; }
.card p { font-size: 0.95rem; color: var(--muted); margin: 0; }

/* ===================== PILL MODULES ===================== */
.module { margin-top: 8px; }
.pills {
  list-style: none; padding: 0; margin: 0 0 18px;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
}
.pill {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.88rem; font-weight: 600;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--ink); cursor: pointer; user-select: none;
  transition: border-color 0.12s ease, background 0.12s ease;
}
.pill:hover { border-color: var(--accent); }
.pill.active { border-color: var(--accent); background: rgba(120, 74, 230, 0.08); }
.pill .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--taskcolor, var(--accent)); }
.pill .chip {
  font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  background: rgba(217, 185, 138, 0.35); color: #7a5c2e;
  border-radius: 6px; padding: 1px 6px;
}
.section--graphite .pill { background: transparent; color: var(--on-graphite); border-color: #2a2e35; }
.section--graphite .pill:hover { border-color: var(--accent); }
.section--graphite .pill.active { border-color: var(--accent); background: rgba(120, 74, 230, 0.18); }
.pill[data-unavailable="1"] { opacity: 0.35; cursor: not-allowed; }

.stage { max-width: 960px; margin: 0 auto; }
.stage--narrow { max-width: 720px; }
.pill-caption { text-align: center; color: var(--muted); font-size: 0.95rem; margin-top: 14px; min-height: 1.4em; }

/* ---- depth dock: student onboard-depth grid, popped out below the RGB grid ---- */
.grid-frame { position: relative; }
.depth-dock { display: flex; justify-content: flex-end; margin-top: 12px; }
.depth-dock[hidden] { display: none; }
.depth-inset {
  position: relative; width: 33%; max-width: 340px;
  border: 2px solid rgba(232, 234, 237, 0.85); border-radius: 10px;
  overflow: hidden; background: #000;
  box-shadow: 0 12px 30px -16px rgba(0, 0, 0, 0.6);
}
.depth-inset .mounted { border: 0; border-radius: 0; box-shadow: none; }
.depth-tag {
  position: absolute; left: 0; bottom: 0;
  font-size: 0.6rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  color: #fff; background: rgba(0, 0, 0, 0.6); padding: 2px 7px;
}

/* ===================== DATASET CARD ===================== */
.dataset-card {
  display: grid; grid-template-columns: 1fr; gap: 20px;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin-top: 36px; align-items: center;
  background: var(--bg-alt);
}
.dataset-card h3 { margin: 0 0 8px; }
.dataset-card p { color: var(--muted); font-size: 0.95rem; margin: 0 0 14px; }
.dataset-card img { width: 100%; border-radius: 10px; border: 1px solid var(--border); }

/* ===================== RESULTS ===================== */
.plots { display: grid; grid-template-columns: 1fr; gap: 20px; }

/* ===================== BIBTEX / FOOTER ===================== */
.bibtex {
  background: var(--ink); color: #e9edf2;
  border-radius: var(--radius); padding: 24px;
  overflow-x: auto; font-size: 0.85rem; line-height: 1.55;
}
.bibtex code { background: none; color: inherit; padding: 0; }
.footer { text-align: center; padding: 40px 0; border-top: 1px solid var(--border); color: var(--muted); }
.footer__fine { font-size: 0.82rem; opacity: 0.8; }

/* ===================== RESPONSIVE ===================== */
@media (min-width: 720px) {
  .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .plots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dataset-card { grid-template-columns: 3fr 2fr; }
}
@media (max-width: 600px) {
  .hero { padding: 56px 0 40px; }
  .section { padding: 48px 0; }
  .topbar__inner { height: 52px; gap: 26px; padding: 0 20px; }
  .topbar__brand { font-size: 1rem; }
  .topbar__links { gap: 18px; }
  .topbar__links a { font-size: 0.9rem; }
  .section, .hero { scroll-margin-top: 60px; }
  .depth-inset { width: 44%; }
}