:root {
  --ink: #0d1b2a;
  --ink-soft: #3b4c5e;
  --glass: rgba(255, 255, 255, 0.78);
  --line: rgba(13, 27, 42, 0.12);
  --accent: #ff5a36;
  --accent-ink: #fff;
  --sky: #cfe3f1;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 Inter, system-ui, sans-serif;
  color: var(--ink);
  background: linear-gradient(#9cc3df, #e9f2f8 60%, #fff);
  background-attachment: fixed;
}
a { color: inherit; }

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.no-webgl #scene { display: none; }

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px clamp(16px, 4vw, 40px);
}
.brand {
  font: 800 1.15rem/1 "Bricolage Grotesque", sans-serif;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: #fff;
  text-shadow: 0 1px 12px rgba(13, 27, 42, 0.45);
}
.links { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.links a {
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
}
.links a:hover, .links a:focus-visible { background: #fff; }

.hud {
  position: fixed;
  right: clamp(12px, 3vw, 32px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  display: grid;
  justify-items: end;
  gap: 14px;
  pointer-events: none;
}
.alt {
  font: 800 1.1rem/1 "Bricolage Grotesque", sans-serif;
  color: #fff;
  text-shadow: 0 1px 10px rgba(13, 27, 42, 0.5);
  font-variant-numeric: tabular-nums;
}
.rail { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; pointer-events: auto; }
.rail a {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-end;
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 8px rgba(13, 27, 42, 0.6);
}
.rail a span { opacity: 0; transition: opacity 0.2s; }
.rail a:hover span, .rail a:focus-visible span, .rail a.on span { opacity: 1; }
.rail a i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid #fff;
  transition: background 0.2s, transform 0.2s;
}
.rail a.on i { background: var(--accent); border-color: var(--accent); transform: scale(1.3); }

main { position: relative; z-index: 2; }
.stop {
  min-height: 150vh;
  display: flex;
  align-items: center;
  padding: 110px clamp(16px, 6vw, 96px);
}
.stop:nth-child(even) { justify-content: flex-end; padding-right: clamp(16px, 9vw, 140px); }
.hero { min-height: 100vh; }

.card {
  width: min(460px, 100%);
  padding: clamp(20px, 3vw, 32px);
  border-radius: 22px;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 20px 60px rgba(13, 27, 42, 0.18);
  opacity: 0.25;
  transform: translateY(24px);
  transition: opacity 0.5s, transform 0.5s;
}
.card.in { opacity: 1; transform: none; }
.card.wide { width: min(760px, 100%); }
.no-webgl .card { opacity: 1; transform: none; }

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
h1, h2 {
  margin: 0 0 12px;
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3.3rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
p { margin: 0 0 14px; color: var(--ink-soft); }
.hint { font-size: 0.85rem; font-weight: 600; color: var(--ink); }
.key {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-right: 6px;
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  animation: bob 1.6s ease-in-out infinite;
}
@keyframes bob { 50% { transform: translateY(4px); } }

.card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 4px 0 14px;
  border: 1px solid var(--line);
}
.facts { margin: 0 0 14px; padding-left: 18px; color: var(--ink); font-size: 0.92rem; }
.facts li { margin-bottom: 4px; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 18px; padding: 0; }
.chips li {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(13, 27, 42, 0.07);
}

.btn {
  display: inline-block;
  margin: 0 6px 8px 0;
  padding: 11px 18px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  background: var(--accent);
  color: var(--accent-ink);
  border: 2px solid var(--accent);
  transition: transform 0.15s;
}
.btn:hover, .btn:focus-visible { transform: translateY(-2px); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.small { margin: 12px 0 0; font-size: 0.85rem; }

.grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.grid a {
  display: grid;
  gap: 2px;
  padding: 10px;
  border-radius: 14px;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid var(--line);
  transition: transform 0.15s, background 0.15s;
}
.grid a:hover, .grid a:focus-visible { transform: translateY(-3px); background: #fff; }
.grid img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; border-radius: 8px; margin-bottom: 6px; }
.grid span { font-size: 0.8rem; color: var(--ink-soft); }

@media (max-width: 720px) {
  .links a:not(:last-child) { display: none; }
  .hud { top: 62px; right: auto; left: 16px; transform: none; justify-items: start; }
  .rail { display: none; }
  .stop, .stop:nth-child(even) {
    min-height: 130vh;
    align-items: flex-end;
    justify-content: center;
    padding: 90px 16px 60px;
  }
  .hero { min-height: 100vh; }
  .card { background: rgba(255, 255, 255, 0.88); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .btn, .grid a { transition: none; }
  .key { animation: none; }
}