/* Aurascope Labs - one page, one canvas, nine stations. Monochrome on purpose. */

:root {
  --bg: #000;
  --ink: #f2f2ef;
  --muted: #8d8d8a;
  --dim: #55555a;
  --rule: rgba(255, 255, 255, 0.14);
  --sans: "Instrument Sans", "Inter", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --gutter: clamp(16px, 5vw, 72px);
  --measure: 34rem;
}

* { box-sizing: border-box; }
html { background: var(--bg); color: var(--ink); scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
::selection { background: var(--ink); color: var(--bg); }

/* ---------------------------------------------------------------- canvas */
#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  pointer-events: none;
}
.no-webgl #scene { display: none; }

/* ---------------------------------------------------------------- top bar */
.bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--gutter);
  mix-blend-mode: difference;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.brand svg { width: 26px; height: 26px; }
.bar nav { display: flex; gap: 22px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; }
.bar nav a { color: var(--muted); }
.bar nav a:hover { color: var(--ink); text-decoration: none; }

/* ---------------------------------------------------------------- stations */
main { position: relative; z-index: 2; }

.station {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 18vh var(--gutter);
}
.station:nth-child(even) { justify-content: flex-end; }
.station .card {
  max-width: var(--measure);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.9s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.station.is-visible .card { opacity: 1; transform: none; }

.eyebrow {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--ink);
  vertical-align: middle;
  margin-right: 12px;
  opacity: 0.6;
}
h1, h2 {
  margin: 0 0 20px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.02;
  text-wrap: balance;
}
h1 { font-size: clamp(42px, 7.2vw, 96px); }
h2 { font-size: clamp(32px, 4.6vw, 60px); }
.body { margin: 0; color: #c9c9c5; font-size: clamp(16px, 1.25vw, 19px); max-width: 30rem; }
.status {
  margin: 26px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.cue {
  margin: 44px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.cue::after {
  content: "";
  width: 1px;
  height: 36px;
  background: linear-gradient(var(--ink), transparent);
  animation: drop 2.2s ease-in-out infinite;
}
@keyframes drop { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); } 100% { transform: scaleY(0); transform-origin: bottom; } }

.lines { list-style: none; margin: 0; padding: 0; }
.lines li {
  padding: 18px 0;
  border-top: 1px solid var(--rule);
  font-size: clamp(20px, 2.2vw, 30px);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.lines li:last-child { border-bottom: 1px solid var(--rule); }

.links { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 10px; }
.links li { font-family: var(--mono); font-size: 14px; letter-spacing: 0.04em; }
.links span { color: var(--muted); display: inline-block; min-width: 7.5em; }
.foot {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

/* ---------------------------------------------------------------- rail */
.rail {
  position: fixed;
  right: calc(var(--gutter) / 2);
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  display: grid;
  gap: 14px;
  mix-blend-mode: difference;
}
.rail a {
  display: block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--ink);
  opacity: 0.28;
  transition: opacity 0.4s, transform 0.4s;
}
.rail a.is-active { opacity: 1; transform: scale(1.6); }

/* ---------------------------------------------------------------- diagrams */
.diagram-toggle {
  display: block;
  margin: 22px 0 0;
  min-height: 44px;
  padding: 0 16px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.3s, background 0.3s;
}
.diagram-toggle:hover { border-color: var(--ink); }
.diagram-toggle:focus-visible, .diagram-close:focus-visible, .bar a:focus-visible, .rail a:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 4px;
}

html:has(.diagram-dialog[open]) { overflow: hidden; }
.diagram-dialog {
  width: min(1240px, calc(100vw - 2 * var(--gutter)));
  max-width: none;
  max-height: min(88vh, 900px);
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--rule);
  overflow: auto;
}
.diagram-dialog::backdrop { background: rgba(0, 0, 0, 0.78); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.diagram-head {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.diagram-head .eyebrow { margin: 0; }
.diagram-close {
  min-height: 44px;
  padding: 0 4px;
  background: transparent;
  color: var(--muted);
  border: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}
.diagram-close:hover { color: var(--ink); }
.diagram-body { padding: 8px 24px 28px; }
.diagram { margin: 24px 0 0; }
.diagram figcaption {
  margin: 0 0 16px;
  font-size: clamp(17px, 1.6vw, 22px);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.diagram-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 6px; }
.diagram-scroll svg { display: block; width: 100%; height: auto; }
.diagram-hint {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------------------------------------------------------------- fallback */
.no-webgl .hero-mark { display: block; width: min(42vw, 360px); margin: 0 0 32px; color: var(--ink); }
.hero-mark { display: none; }

/* ---------------------------------------------------------------- small screens */
@media (max-width: 720px) {
  body { font-size: 15px; }
  h1 { font-size: clamp(40px, 11vw, 56px); }
  h2 { font-size: clamp(27px, 7.4vw, 36px); }
  .body { font-size: 15px; }
  .bar nav { gap: 18px; font-size: 11px; letter-spacing: 0.12em; }
  .bar nav a { padding: 12px 0; }
  .brand span { display: none; }
  .rail { display: none; }
  .station { padding: 14vh var(--gutter); align-items: flex-end; }
  .station:nth-child(even) { justify-content: flex-start; }
  .station .card { max-width: 100%; }
  .body { max-width: 100%; }
  .lines li { font-size: 19px; }
  .diagram-head { padding: 10px 16px; }
  .diagram-body { padding: 4px 16px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .station .card { transition: none; opacity: 1; transform: none; }
  .cue::after { animation: none; }
}