:root {
  /* Typography tokens: Space Grotesk** Grotesk* for large engineered headings; IBM Plex Sans Condensed** Condensed* for rail labels; JetBrains Mono. */
  --deep: #080B10;
  --graphite: #151C24;
  --ceramic: #E7E1D2;
  --amber: #FFB84D;
  --cyan: #37D7FF;
  --magenta: #FF4F9A;
  --green: #6DFF9B;
  --rail: #65717F;
  --display: "Space Grotesk", "Space", "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --condensed: "IBM Plex Sans Condensed", "IBM Plex Sans", "Lato", "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--deep); }
body {
  margin: 0;
  color: var(--ceramic);
  background:
    radial-gradient(circle at 68% 20%, rgba(55, 215, 255, 0.08), transparent 32vw),
    radial-gradient(circle at 28% 72%, rgba(255, 184, 77, 0.075), transparent 34vw),
    linear-gradient(110deg, var(--deep) 0%, #0b1118 46%, var(--graphite) 100%);
  font-family: var(--condensed);
  overflow-x: hidden;
}

button { font: inherit; color: inherit; }
.mono { font-family: var(--mono); }

.grain {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    repeating-radial-gradient(circle at 20% 30%, rgba(231, 225, 210, 0.16) 0 1px, transparent 1px 5px),
    linear-gradient(rgba(101, 113, 127, 0.08) 1px, transparent 1px);
  background-size: 7px 7px, 100% 41px;
  mix-blend-mode: screen;
}

.cursor-lamp {
  position: fixed;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -9px;
  border-radius: 999px;
  border: 1px solid rgba(255, 184, 77, 0.6);
  background: radial-gradient(circle, rgba(255, 184, 77, 0.45), transparent 60%);
  pointer-events: none;
  z-index: 38;
  transform: translate3d(var(--cursor-x, 0), var(--cursor-y, 0), 0) scale(var(--cursor-scale, 1));
  transition: transform 140ms ease-out, opacity 260ms ease;
  opacity: 0.5;
}

.frame-index {
  position: fixed;
  z-index: 30;
  right: clamp(16px, 2.8vw, 48px);
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 12px;
}

.frame-dot {
  width: 110px;
  padding: 0;
  background: transparent;
  border: 0;
  color: rgba(231, 225, 210, 0.45);
  text-align: right;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 10px;
  cursor: pointer;
  position: relative;
}

.frame-dot::after {
  content: "";
  display: inline-block;
  width: 34px;
  height: 2px;
  margin-left: 10px;
  vertical-align: middle;
  background: var(--rail);
  box-shadow: 0 0 0 rgba(55, 215, 255, 0);
  transition: width 300ms ease, background 300ms ease, box-shadow 300ms ease;
}

.frame-dot span {
  display: block;
  font-family: var(--mono);
  color: var(--rail);
  font-size: 10px;
}

.frame-dot.is-active { color: var(--ceramic); }
.frame-dot.is-active::after { width: 62px; background: var(--amber); box-shadow: 0 0 18px rgba(255, 184, 77, 0.8); }
.frame-dot.is-active span { color: var(--cyan); }

.replay { position: relative; z-index: 12; }
.scene {
  min-height: 100vh;
  width: 100%;
  display: grid;
  align-content: center;
  padding: 9vh 13vw 9vh clamp(28px, 8vw, 130px);
  position: relative;
}

.scene::before {
  content: attr(data-phase);
  position: absolute;
  left: clamp(22px, 4vw, 70px);
  top: 8vh;
  font-family: var(--mono);
  color: rgba(101, 113, 127, 0.45);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  font-size: 11px;
  writing-mode: vertical-rl;
}

.master-title { max-width: 1000px; position: relative; }
.domain-mark {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid rgba(101, 113, 127, 0.45);
  border-radius: 999px;
  padding: 9px 14px;
  background: rgba(21, 28, 36, 0.55);
  box-shadow: inset 0 0 20px rgba(8, 11, 16, 0.8);
  font-family: var(--mono);
  font-size: 13px;
  color: rgba(231, 225, 210, 0.82);
}

.clock-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin: 0 3px;
  background: var(--amber);
  box-shadow: 0 0 18px var(--amber), 0 0 46px rgba(255, 184, 77, 0.4);
  animation: clockPulse 1.45s ease-in-out infinite;
}

h1, h2 {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.075em;
  text-transform: lowercase;
  line-height: 0.78;
  margin: 0;
}

h1 {
  margin-top: 4vh;
  font-size: clamp(76px, 15vw, 220px);
  max-width: 1100px;
}

h1 span { display: block; }
h1 span:first-child {
  color: transparent;
  -webkit-text-stroke: 1px rgba(231, 225, 210, 0.88);
  text-shadow: 0 0 38px rgba(55, 215, 255, 0.12);
}
h1 span:nth-child(2) { color: rgba(231, 225, 210, 0.85); font-size: 0.42em; letter-spacing: -0.035em; margin-left: 10vw; }
h1 span:last-child { color: var(--amber); margin-left: 3vw; }

.field-note, .scene p {
  max-width: 560px;
  color: rgba(231, 225, 210, 0.72);
  font-size: clamp(19px, 2.15vw, 31px);
  line-height: 1.16;
  letter-spacing: 0.015em;
}

.field-note { margin: 4vh 0 0 clamp(12px, 21vw, 320px); }
.start-hint {
  margin-top: 8vh;
  color: var(--rail);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.chapter-label {
  color: var(--cyan);
  font-family: var(--mono);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 12px;
  margin-bottom: 22px;
}

.scene h2 {
  font-size: clamp(58px, 11vw, 172px);
  max-width: 980px;
  color: var(--ceramic);
  text-shadow: 0 0 40px rgba(8, 11, 16, 0.7);
}

.scene-fork h2 { color: var(--cyan); }
.scene-schedule h2 { color: var(--ceramic); }
.scene-race h2 { color: var(--magenta); }
.scene-resolve h2 { color: var(--green); }
.scene-complete h2 { color: var(--amber); font-size: clamp(84px, 20vw, 290px); }

.branch-copy, .race-stamp, .resolver-note {
  display: inline-block;
  width: max-content;
  max-width: 82vw;
  margin-top: 34px;
  padding: 12px 16px;
  color: var(--ceramic);
  background: rgba(8, 11, 16, 0.72);
  border: 1px solid rgba(101, 113, 127, 0.55);
  box-shadow: 0 0 26px rgba(55, 215, 255, 0.08);
}

.queue-readout {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 34px;
  font-family: var(--mono);
}
.queue-readout span {
  padding: 10px 14px;
  border: 1px solid rgba(101, 113, 127, 0.55);
  background: rgba(21, 28, 36, 0.78);
  color: var(--green);
}

.completion-seal {
  width: min(72vw, 720px);
  margin-top: 32px;
  padding: 18px 22px;
  border: 2px solid var(--amber);
  color: var(--amber);
  font-family: var(--mono);
  font-size: clamp(26px, 5vw, 70px);
  letter-spacing: 0.22em;
  text-align: center;
  transform: rotate(-3deg);
  box-shadow: inset 0 0 34px rgba(255, 184, 77, 0.14), 0 0 46px rgba(255, 184, 77, 0.16);
}

.simulation-stage {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  overflow: hidden;
}

.loom-svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.95; }
.warp-lines path {
  stroke: rgba(101, 113, 127, 0.22);
  stroke-width: 1;
  stroke-dasharray: 2 16;
}
.rail-bed path {
  fill: none;
  stroke: rgba(101, 113, 127, 0.36);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 18 12;
}
.rail-active path {
  fill: none;
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-dasharray: var(--dash, 0) 2400;
}
.draw-cyan { stroke: url(#cyanTrail); }
.draw-green { stroke: var(--green); }
.draw-magenta { stroke: url(#raceTrail); }
.draw-amber { stroke: url(#amberTrail); }
.switches circle {
  fill: var(--deep);
  stroke: var(--amber);
  stroke-width: 2;
  opacity: var(--switch-opacity, 0.35);
}

.loom-annotations {
  position: absolute;
  inset: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(231, 225, 210, 0.56);
}
.annotation {
  position: absolute;
  padding: 7px 10px;
  border: 1px solid rgba(101, 113, 127, 0.34);
  background: rgba(8, 11, 16, 0.54);
  box-shadow: inset 0 -1px 0 rgba(255, 184, 77, 0.18);
  transform: translateY(var(--annotation-drift, 0));
  opacity: var(--annotation-opacity, 0.54);
}
.annotation::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 13px var(--amber);
}
.ann-init { left: 8vw; top: 22vh; color: var(--amber); }
.ann-fork { left: 31vw; top: 32vh; color: var(--cyan); }
.ann-fork::before { background: var(--cyan); box-shadow: 0 0 13px var(--cyan); }
.ann-race { right: 18vw; top: 64vh; color: var(--magenta); }
.ann-race::before { background: var(--magenta); box-shadow: 0 0 13px var(--magenta); }
.ann-resolve { right: 8vw; top: 49vh; color: var(--green); }
.ann-resolve::before { background: var(--green); box-shadow: 0 0 13px var(--green); }

.timing-wheel {
  position: absolute;
  left: min(56vw, 860px);
  top: 50%;
  width: clamp(210px, 27vw, 430px);
  height: clamp(210px, 27vw, 430px);
  margin: calc(clamp(210px, 27vw, 430px) / -2) 0 0 calc(clamp(210px, 27vw, 430px) / -2);
  border-radius: 50%;
  transform: rotate(var(--wheel-rot, 0deg));
  opacity: 0.78;
}
.wheel-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(231, 225, 210, 0.18);
  background:
    repeating-conic-gradient(from 0deg, rgba(101, 113, 127, 0.55) 0 1deg, transparent 1deg 9deg),
    radial-gradient(circle, transparent 54%, rgba(255, 184, 77, 0.09) 55%, transparent 59%);
  mask-image: radial-gradient(circle, transparent 42%, black 43%, black 72%, transparent 73%);
}
.ring-b { inset: 16%; border-color: rgba(55, 215, 255, 0.25); transform: rotate(16deg); }
.wheel-hand {
  position: absolute;
  left: 50%; top: 50%;
  width: 45%; height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, var(--amber), transparent);
  box-shadow: 0 0 14px var(--amber);
}
.wheel-core {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 72px; height: 72px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--mono);
  color: var(--amber);
  background: rgba(8, 11, 16, 0.85);
  border: 1px solid rgba(255, 184, 77, 0.44);
}

.event-packet {
  --x: 8vw;
  --y: 28vh;
  --packet-color: var(--cyan);
  position: absolute;
  left: var(--x);
  top: var(--y);
  min-width: 72px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid var(--packet-color);
  background: rgba(8, 11, 16, 0.78);
  color: var(--packet-color);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  display: grid;
  place-items: center;
  box-shadow: 0 0 18px color-mix(in srgb, var(--packet-color), transparent 45%);
  transform: translate(-50%, -50%) scale(var(--packet-scale, 1));
}
.packet-b { --packet-color: var(--green); }
.packet-c { --packet-color: var(--magenta); }
.packet-d { --packet-color: var(--amber); }

.lock-gate {
  position: absolute;
  left: 57vw;
  top: 48vh;
  width: 72px;
  height: 72px;
  border-radius: 18px;
  border: 2px solid var(--green);
  background: rgba(8, 11, 16, 0.72);
  transform: rotate(var(--lock-rot, -18deg));
  box-shadow: 0 0 22px rgba(109, 255, 155, 0.18);
}
.lock-gate span {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 50%;
  height: 4px;
  margin-top: -2px;
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}

.queue-spool {
  position: absolute;
  left: 16vw;
  bottom: 13vh;
  display: flex;
  gap: var(--queue-gap, 12px);
  align-items: center;
  padding: 10px;
  border: 1px solid rgba(101, 113, 127, 0.42);
  background: rgba(21, 28, 36, 0.55);
}
.queue-spool i {
  width: 28px;
  height: 46px;
  border-radius: 999px;
  border: 1px solid var(--cyan);
  background: linear-gradient(180deg, rgba(55, 215, 255, 0.3), transparent);
}

.collision-sparks {
  position: absolute;
  left: 62vw;
  top: 68vh;
  width: 110px;
  height: 110px;
  opacity: var(--spark-opacity, 0);
}
.collision-sparks b {
  position: absolute;
  left: 50%; top: 50%;
  width: 42px; height: 2px;
  background: var(--magenta);
  transform-origin: left center;
  box-shadow: 0 0 15px var(--magenta);
}
.collision-sparks b:nth-child(1) { transform: rotate(12deg); }
.collision-sparks b:nth-child(2) { transform: rotate(82deg); background: var(--amber); }
.collision-sparks b:nth-child(3) { transform: rotate(151deg); }
.collision-sparks b:nth-child(4) { transform: rotate(226deg); background: var(--cyan); }
.collision-sparks b:nth-child(5) { transform: rotate(306deg); background: var(--green); }

.completion-band {
  position: absolute;
  left: 0;
  bottom: 18vh;
  height: 8px;
  width: var(--complete-width, 0%);
  background: linear-gradient(90deg, transparent, var(--cyan), var(--green), var(--amber));
  box-shadow: 0 0 28px rgba(255, 184, 77, 0.5);
}

body.awake .event-packet { animation: packetWake 900ms ease both; }
body.awake .queue-spool i { animation: queueBlink 1.4s ease-in-out infinite; }
body.awake .queue-spool i:nth-child(2) { animation-delay: 160ms; }
body.awake .queue-spool i:nth-child(3) { animation-delay: 320ms; }
body.awake .queue-spool i:nth-child(4) { animation-delay: 480ms; }
body.awake .queue-spool i:nth-child(5) { animation-delay: 640ms; }

@keyframes clockPulse {
  0%, 100% { transform: scale(0.75); opacity: 0.8; }
  50% { transform: scale(1.25); opacity: 1; }
}
@keyframes packetWake {
  from { opacity: 0; filter: blur(10px); }
  to { opacity: 1; filter: blur(0); }
}
@keyframes queueBlink {
  0%, 100% { transform: scaleY(0.72); opacity: 0.45; }
  50% { transform: scaleY(1); opacity: 1; }
}

@media (max-width: 800px) {
  .frame-index { right: 12px; gap: 8px; }
  .frame-dot { width: 70px; font-size: 0; }
  .frame-dot::after { width: 26px; }
  .frame-dot.is-active::after { width: 44px; }
  .scene { padding-right: 78px; padding-left: 28px; }
  .scene::before { display: none; }
  .field-note { margin-left: 0; }
  .timing-wheel { left: 72vw; opacity: 0.45; }
  .event-packet { min-width: 58px; }
}