:root {
  --night: #05080a;
  --cold: #c8d2d6;
  --cold-dim: #7c898f;
  --lamp: #f2c48c;
  --paper: #eadcc4;
  --paper-dim: #a8977d;
  --screen: #120d09;
  --serif: "Literata", "Iowan Old Style", Georgia, serif;
  --industrial: "Big Shoulders Text", "Arial Narrow", sans-serif;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { background: var(--night); }

body {
  margin: 0;
  background: var(--night);
  color: var(--cold);
  font-family: var(--serif);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#world {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100lvh;
  display: block;
  z-index: 0;
}

/* ---------- descent overlays ---------- */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.pin-line {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.pin-line line {
  stroke: var(--cold);
  stroke-width: 1;
  opacity: .55;
  vector-effect: non-scaling-stroke;
}

.pin {
  position: absolute;
  left: 0; top: 0;
  margin: 0;
  font-style: italic;
  font-weight: 350;
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--cold);
  white-space: nowrap;
  will-change: transform, opacity;
}

.beat {
  position: absolute;
  left: max(16px, 6.5vw);
  bottom: 17vh;
  margin: 0;
  max-width: 19ch;
  font-weight: 300;
  font-size: clamp(21px, 2.1vw, 31px);
  line-height: 1.32;
  color: var(--cold);
  opacity: 0;
  text-shadow: 0 0 24px rgba(0, 0, 0, .85), 0 0 2px rgba(0, 0, 0, .9);
  will-change: transform, opacity, filter;
}

/* ---------- chrome ---------- */

.chrome {
  position: fixed;
  top: 0; right: 0;
  z-index: 5;
  padding: 22px max(16px, 3vw);
}

.skip {
  font-size: 15px;
  color: var(--cold-dim);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color .2s;
}
.skip:hover { color: var(--cold); }
.skip:focus-visible, a:focus-visible {
  outline: 1px solid var(--lamp);
  outline-offset: 4px;
}

.hint, .range {
  position: fixed;
  z-index: 3;
  margin: 0;
  pointer-events: none;
  font-family: var(--industrial);
  font-weight: 500;
  color: var(--cold-dim);
}

.hint {
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  font-size: 15px;
  letter-spacing: .04em;
  transition: opacity .6s;
}

.range {
  left: max(16px, 3vw);
  bottom: 24px;
  font-size: 15px;
  letter-spacing: .05em;
  font-variant-numeric: tabular-nums;
  transition: opacity .6s;
}

/* ---------- the descent ---------- */

.descent {
  height: 1100vh;
  position: relative;
}

/* ---------- the desk (content) ---------- */

.desk {
  position: relative;
  z-index: 4;
  margin-top: -100vh;           /* the page arrives on the screen you just flew into */
  color: var(--paper);
  padding: 30vh max(16px, 8.5vw) 18vh;
  visibility: hidden;
  /* the first screen is the monitor you flew into; below it the page is solid */
  background: linear-gradient(to bottom, transparent 0, transparent 100vh, var(--screen) calc(100vh + 1px));
}

.sheet {
  max-width: 36rem;
  font-size: 19px;
  line-height: 1.62;
}

.lede {
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.3;
  font-weight: 300;
  margin: 0 0 18vh;
  max-width: 24ch;
  color: var(--lamp);
}

.desk h2 {
  font-family: var(--industrial);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: .03em;
  color: var(--paper-dim);
  margin: 0 0 1.4rem;
}

.desk section { margin-bottom: 7rem; }

.pieces {
  list-style: none;
  margin: 0;
  padding: 0;
}
.pieces li + li { margin-top: 2.2rem; }
.pieces a {
  display: block;
  color: inherit;
  text-decoration: none;
}
.pieces h3 {
  margin: 0;
  font-size: 26px;
  line-height: 1.22;
  font-weight: 450;
  transition: color .2s;
}
.pieces a:hover h3 { color: var(--lamp); }
.pieces p { margin: .35rem 0 .3rem; color: var(--paper-dim); }
.meta {
  font-size: 15px;
  color: #7f705c;
}

.works { margin: 0; }
.works div { margin-bottom: 1.5rem; }
.works dt { font-weight: 600; }
.works dt a { color: var(--paper); text-underline-offset: 4px; text-decoration-thickness: 1px; }
.works dt a:hover { color: var(--lamp); }
.works dd { margin: .15rem 0 0; color: var(--paper-dim); }

.rack {
  list-style: none;
  padding: 0;
  margin: 1.6rem 0 0;
  border-left: 1px solid #3a2d20;
}
.rack li {
  position: relative;
  padding: .32rem 0 .32rem 1.5rem;
  font-family: var(--industrial);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: .04em;
}
.rack li::before {
  content: "";
  position: absolute;
  left: .55rem; top: 50%;
  width: 5px; height: 5px;
  margin-top: -2px;
  border-radius: 50%;
  background: #7bd69a;
  box-shadow: 0 0 8px #7bd69a;
  animation: blink 2.6s steps(1) infinite;
  animation-delay: calc(var(--d, 0) * -0.7s);
}
.rack li[data-unit="1"]::before { background: #e3a457; box-shadow: 0 0 8px #e3a457; animation: breathe 5s ease-in-out infinite; }
.rack li[data-unit="2"] { --d: 1; }
.rack li[data-unit="3"] { --d: 2; }
.rack li[data-unit="4"] { --d: 3; }

@keyframes blink { 0%, 100% { opacity: 1; } 47% { opacity: .25; } 52% { opacity: 1; } 81% { opacity: .4; } 84% { opacity: 1; } }
@keyframes breathe { 0%, 100% { opacity: .25; } 50% { opacity: 1; } }

.desk a { color: var(--paper); }
.desk p a { text-underline-offset: 4px; text-decoration-thickness: 1px; }
.desk p a:hover { color: var(--lamp); }
.onward, .play-link {
  display: inline-block; margin: 1.2rem 0 0; padding: 0.7rem 1.3rem;
  color: var(--desk-ink, #171310) !important; text-decoration: none;
  background: linear-gradient(135deg, #f7e6b0, #f0c78e);
  border: 1px solid rgba(20, 16, 10, 0.5); border-radius: 8px;
  font-family: "Big Shoulders Text", system-ui, sans-serif;
  font-weight: 700; font-size: 1.05rem; letter-spacing: 0.04em;
}
.onward:hover, .play-link:hover { filter: brightness(1.06); }

.leave {
  margin-top: 10rem;
  font-size: 17px;
}
.leave a { color: var(--paper-dim); text-underline-offset: 5px; text-decoration-thickness: 1px; }

/* ---------- no WebGL ---------- */

.nogl #world { display: none; }
.nogl .descent { height: 0; }
.nogl .overlay, .nogl .hint, .nogl .range { display: none; }
.nogl .desk { margin-top: 0; padding-top: 14vh; visibility: visible; }
.nogl body, .nogl { background: var(--screen); }

@media (max-width: 700px) {
  .beat { bottom: 14vh; right: 16px; max-width: none; font-size: 21px; }
  .pin { font-size: 15px; }
  .desk { padding-top: 24vh; }
  .sheet { font-size: 18px; }
  .pieces h3 { font-size: 23px; }
  .hint { bottom: 64px; }
}

@media (prefers-reduced-motion: reduce) {
  .rack li::before { animation: none; }
  .beat { will-change: auto; }
}

.beat.high { bottom: auto; top: 16vh; }