:root {
  --wall: #111014;
  --wall-2: #1a181f;
  --plaque: #f3ece0;
  --ink: #221e1a;
  --muted: #8c8579;
  --brass: #c9a45c;
  --fail: #c2412d;
  --term: #7fdc8c;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, #2a2530 0%, transparent 70%),
    var(--wall);
  color: #e9e3d8;
  font-family: var(--serif);
  line-height: 1.55;
}

/* ---------- entrance ---------- */
.entrance {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 20px 32px;
  text-align: center;
}

.trace {
  text-align: left;
  display: inline-block;
  min-width: min(100%, 520px);
  max-width: 100%;
  min-height: 9.5em;
  margin: 0 0 32px;
  padding: 14px 18px;
  background: #0a0a0c;
  border: 1px solid #2c2a31;
  border-radius: 6px;
  color: var(--term);
  font: 13px/1.5 var(--mono);
  white-space: pre-wrap;
  overflow-x: auto;
}

h1 {
  margin: 0;
  font-weight: 400;
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  letter-spacing: 0.02em;
  line-height: 1.1;
}
h1 span { color: var(--brass); font-style: italic; }

.tagline {
  max-width: 560px;
  margin: 16px auto 28px;
  color: #b9b1a4;
  font-size: 1.1rem;
}

.rooms {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
}
.rooms button {
  font: 14px var(--serif);
  color: #d8d1c4;
  background: transparent;
  border: 1px solid #3a3640;
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
}
.rooms button span { color: var(--muted); font-family: var(--mono); font-size: 12px; margin-left: 4px; }
.rooms button:hover { border-color: var(--brass); }
.rooms button[aria-pressed="true"] { background: var(--brass); border-color: var(--brass); color: var(--ink); }
.rooms button[aria-pressed="true"] span { color: #5a4a2a; }

.wrong-turn {
  font: 15px var(--mono);
  color: var(--wall);
  background: var(--term);
  border: 0;
  border-radius: 4px;
  padding: 10px 18px;
  cursor: pointer;
}
.wrong-turn:hover { filter: brightness(1.1); }

button:focus-visible, a:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }

/* ---------- gallery ---------- */
.gallery {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 64px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 40px 28px;
}

.exhibit {
  position: relative;
  background: var(--plaque);
  color: var(--ink);
  padding: 26px 26px 20px;
  border-radius: 2px;
  box-shadow: 0 30px 60px -30px #000, 0 0 0 1px #d9ccb3 inset;
  transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.4s ease;
  transition-delay: calc(var(--i, 0) % 3 * 60ms);
}
/* Dim-then-light only when JS runs; without JS (and for crawlers) every plaque is fully visible. */
.js .exhibit:not(.lit) { opacity: 0.25; transform: translateY(12px); }
/* spotlight cone above each plaque */
.exhibit::before {
  content: "";
  position: absolute;
  inset: -40px 10% auto;
  height: 60px;
  background: radial-gradient(ellipse at 50% 100%, rgba(255, 236, 190, 0.22), transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.exhibit.lit { opacity: 1; transform: none; }
.exhibit.lit::before { opacity: 1; }
.exhibit.spot { box-shadow: 0 0 0 3px var(--brass), 0 30px 80px -20px rgba(201, 164, 92, 0.5); }
.exhibit:focus { outline: none; }

.plaque-no {
  margin: 0 0 6px;
  font: 11px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8a7d64;
}
.exhibit h2, .exhibit h1 { margin: 0; font-size: 1.45rem; font-weight: 600; line-height: 1.2; letter-spacing: 0; }
.exhibit h1 { font-size: 1.9rem; }
.exhibit h2 a { color: inherit; text-decoration: none; }
.exhibit h2 a:hover { text-decoration: underline; text-decoration-color: var(--brass); }
.meta { margin: 4px 0 16px; color: #6f6656; font-size: 0.92rem; }

.route {
  list-style: none;
  margin: 0 0 16px;
  padding: 0 0 0 14px;
  border-left: 2px dashed #c9bda5;
  font-size: 0.95rem;
}
.route li { position: relative; padding: 3px 0 3px 30px; }
.route .hop {
  position: absolute;
  left: 0;
  font: 12px/1.9 var(--mono);
  color: #9a8e76;
  white-space: pre;
}
.route li.fail { color: var(--fail); font-weight: 600; }
.route .x { font-family: var(--mono); }

.lesson {
  margin: 0 0 10px;
  padding-top: 12px;
  border-top: 1px solid #dccfb6;
  font-style: italic;
}
.source { margin: 0; font-size: 0.8rem; color: #8a7d64; }

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid #25222a;
}
footer .small { font-size: 0.85rem; }
footer a, .crumbs a, .walk a, .about-event a { color: #d8c08a; text-underline-offset: 3px; }
footer a:hover, .crumbs a:hover, .walk a:hover { color: var(--brass); }

/* ---------- single exhibit page ---------- */
.crumbs {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 20px 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.gallery.single { grid-template-columns: minmax(0, 640px); justify-content: center; padding-top: 48px; }
.about-event { margin: 0; color: #b9b1a4; }
.walk {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: start;
  font-size: 0.95rem;
}
.walk-next { text-align: right; }
.walk-hall { color: var(--muted); }
kbd {
  font: 12px var(--mono);
  padding: 1px 5px;
  border: 1px solid #3a3640;
  border-radius: 3px;
  color: #cfc8bb;
}

@media (max-width: 480px) {
  .entrance { padding-top: 32px; }
  .trace { font-size: 11px; }
  .gallery { grid-template-columns: 1fr; gap: 28px; padding-inline: 14px; }
  .exhibit { padding: 20px 18px 16px; }
  .exhibit h1 { font-size: 1.5rem; }
  .crumbs { padding: 24px 14px 0; }
  .walk { grid-template-columns: 1fr; }
  .walk-next { text-align: left; }
}