:root {
  /* Typography compliance tokens from DESIGN.md: Interface / ticker labels:** `Space Mono`. Use all-caps; IBM Plex Mono` for receipt-like closing print or terminal fragments when a more mechanical voice is needed. */
  --carbon: #171512;
  --cream: #EFE1C1;
  --oxide: #C66A32;
  --olive: #657247;
  --brass: #B08A45;
  --marble: #8C8174;
  --teal: #356B6F;
  --display: "Ultra", "Cooper Black", serif;
  --mono: "Space Mono", "IBM Plex Mono", monospace;
  --body: "Nunito Sans", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--carbon);
  color: var(--cream);
  font-family: var(--body);
  overflow-x: hidden;
}

button { font: inherit; color: inherit; }

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  opacity: .12;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(239,225,193,.38) 0 1px, transparent 1.5px),
    radial-gradient(circle at 76% 62%, rgba(176,138,69,.28) 0 1px, transparent 1.4px),
    linear-gradient(115deg, transparent, rgba(239,225,193,.05), transparent);
  background-size: 13px 17px, 19px 23px, 100% 100%;
}

.console-shell {
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(176,138,69,.16) 0 1px, transparent 1px) 0 0 / 72px 72px,
    radial-gradient(circle at 78% 18%, rgba(53,107,111,.32), transparent 30vw),
    radial-gradient(circle at 18% 72%, rgba(198,106,50,.16), transparent 28vw),
    var(--carbon);
  border: 14px solid #0d0c0a;
}

.ticker-rail {
  position: sticky;
  top: 0;
  z-index: 12;
  height: 76px;
  display: grid;
  grid-template-columns: minmax(230px, 28vw) 1fr minmax(180px, 22vw);
  align-items: center;
  background: linear-gradient(180deg, #221e17, #15130f);
  border-bottom: 4px solid var(--brass);
  box-shadow: 0 12px 24px rgba(0,0,0,.36), inset 0 -1px 0 rgba(239,225,193,.18);
  overflow: hidden;
}

.rail-brand {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3.5vw, 3.2rem);
  color: var(--cream);
  padding-left: 24px;
  letter-spacing: -.05em;
  text-shadow: 2px 2px 0 var(--oxide);
}

.ticker-window {
  height: 100%;
  overflow: hidden;
  border-left: 1px solid rgba(176,138,69,.45);
  border-right: 1px solid rgba(176,138,69,.45);
}

.ticker-track {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 26px;
  width: max-content;
  animation: tickerDrift 28s linear infinite;
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .12em;
  color: rgba(239,225,193,.86);
  white-space: nowrap;
}

.ticker-track span {
  border-left: 2px solid var(--brass);
  padding-left: 18px;
}

.ticker-track i {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--olive);
  box-shadow: 0 0 12px var(--olive);
  animation: bulbBlink 2.4s steps(2) infinite;
}

.rail-coordinate {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--brass);
  text-align: right;
  padding-right: 20px;
}

.spine {
  position: fixed;
  z-index: 10;
  top: 90px;
  left: 14px;
  bottom: 14px;
  width: 190px;
  padding: 18px 12px;
  background: linear-gradient(180deg, #282219, #14120f);
  border-right: 4px solid var(--brass);
  box-shadow: 18px 0 24px rgba(0,0,0,.32), inset -7px 0 0 rgba(101,114,71,.22);
}

.spine-tab {
  width: 100%;
  min-height: 76px;
  margin-bottom: 12px;
  padding: 11px 10px;
  border: 2px solid rgba(176,138,69,.52);
  border-radius: 18px 6px 6px 18px;
  background: #30291d;
  text-align: left;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform .25s ease, background .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.spine-tab span {
  display: block;
  font-family: var(--display);
  font-size: 1.45rem;
  letter-spacing: -.04em;
  color: var(--brass);
}

.spine-tab:hover, .spine-tab.active {
  transform: scale(1.045) translateX(5px);
  background: var(--oxide);
  border-color: var(--cream);
  color: var(--carbon);
  box-shadow: 0 14px 24px rgba(198,106,50,.28);
}

.spine-tab:hover span, .spine-tab.active span { color: var(--cream); }

.spine-meter {
  position: absolute;
  bottom: 18px;
  left: 18px;
  display: flex;
  gap: 10px;
}

.spine-meter b {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--olive);
  box-shadow: 0 0 14px rgba(101,114,71,.75);
  animation: bulbBlink 3s steps(2) infinite;
}

.spine-meter b:nth-child(2) { animation-delay: .6s; }
.spine-meter b:nth-child(3) { animation-delay: 1.2s; }
.spine-meter b:nth-child(4) { animation-delay: 1.8s; }

.briefing { margin-left: 190px; }

.chapter {
  min-height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: minmax(330px, .78fr) minmax(420px, 1.22fr);
  gap: clamp(24px, 5vw, 68px);
  align-items: center;
  padding: clamp(34px, 5vw, 72px) clamp(26px, 5vw, 80px);
  border-bottom: 2px solid rgba(176,138,69,.36);
  position: relative;
  overflow: hidden;
}

.chapter::before {
  content: attr(data-title);
  position: absolute;
  right: 26px;
  bottom: 18px;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .24em;
  color: rgba(239,225,193,.25);
}

.readout {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.kicker {
  margin: 0 0 14px;
  font-family: var(--mono);
  color: var(--brass);
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .78rem;
}

h1, h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  color: var(--cream);
  letter-spacing: -.07em;
  line-height: .86;
  text-shadow: 4px 4px 0 rgba(198,106,50,.72);
}

h1 { font-size: clamp(4.4rem, 10vw, 11rem); }
h2 { font-size: clamp(3.7rem, 8vw, 8.6rem); }

.lead, .readout p:not(.kicker) {
  font-size: clamp(1.08rem, 1.6vw, 1.45rem);
  line-height: 1.48;
  color: rgba(239,225,193,.82);
  max-width: 620px;
}

.ledger-line, .coordinate-strip {
  margin-top: 28px;
  padding: 17px 19px;
  border: 2px solid var(--brass);
  border-radius: 22px;
  background: rgba(23,21,18,.72);
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--cream);
  box-shadow: inset 0 0 24px rgba(101,114,71,.22);
}

.ledger-line span { color: var(--oxide); text-transform: uppercase; margin-right: 12px; }

.marble-stage {
  position: relative;
  min-height: min(72vh, 720px);
  border: 5px solid #0d0c0a;
  outline: 2px solid var(--brass);
  border-radius: 36px;
  overflow: hidden;
  background: #2b2926;
  box-shadow: 0 40px 80px rgba(0,0,0,.46), inset 0 0 0 8px rgba(239,225,193,.05);
}

.marble-core {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 24% 34%, rgba(239,225,193,.28), transparent 16%),
    radial-gradient(ellipse at 78% 62%, rgba(53,107,111,.34), transparent 18%),
    radial-gradient(ellipse at 46% 78%, rgba(198,106,50,.22), transparent 22%),
    linear-gradient(126deg, transparent 0 18%, rgba(239,225,193,.72) 19%, transparent 20% 32%, rgba(176,138,69,.62) 33%, transparent 34% 54%, rgba(53,107,111,.7) 55%, transparent 56%),
    linear-gradient(38deg, transparent 0 28%, rgba(140,129,116,.86) 29%, transparent 31% 49%, rgba(198,106,50,.62) 50%, transparent 51% 73%, rgba(239,225,193,.56) 74%, transparent 75%),
    #24211d;
  filter: contrast(1.08) saturate(.92);
}

.marble-core::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(101deg, transparent 0 18px, rgba(239,225,193,.035) 19px 20px),
    radial-gradient(circle at 50% 50%, transparent, rgba(23,21,18,.46));
}

.hud-grid {
  position: absolute;
  inset: 9%;
  border: 1px solid rgba(53,107,111,.8);
  border-radius: 28px;
  mix-blend-mode: screen;
}

.hud-grid::before, .hud-grid::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px dashed rgba(176,138,69,.72);
  border-radius: 22px;
}

.hud-grid::after {
  inset: 36px;
  border-color: rgba(239,225,193,.38);
  transform: skew(-8deg);
}

.scan-beam {
  position: absolute;
  top: -20%;
  left: 18%;
  width: 9px;
  height: 140%;
  background: linear-gradient(180deg, transparent, rgba(53,107,111,.88), rgba(239,225,193,.48), transparent);
  box-shadow: 0 0 28px var(--teal);
  transform: rotate(22deg);
  animation: scanSweep 6s ease-in-out infinite;
  mix-blend-mode: screen;
}

.target, .hud-label {
  position: absolute;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--cream);
  letter-spacing: .14em;
  padding: 8px 10px;
  border: 1px solid var(--teal);
  background: rgba(23,21,18,.62);
}

.t1 { top: 16%; left: 14%; }
.t2 { top: 50%; right: 12%; }
.t3 { bottom: 17%; left: 34%; }

.carbon-puck {
  position: absolute;
  width: 58px;
  height: 58px;
  border: 4px solid var(--brass);
  border-radius: 50%;
  background: var(--carbon);
  box-shadow: 0 18px 26px rgba(0,0,0,.48), inset 0 0 0 6px #27221a;
  font-family: var(--display);
  color: var(--cream);
  cursor: pointer;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.carbon-puck:hover, .carbon-puck.is-hot {
  transform: scale(1.07);
  border-color: var(--oxide);
  box-shadow: 0 24px 34px rgba(198,106,50,.26), inset 0 0 0 6px #27221a;
}

.p1 { left: 26%; top: 24%; }
.p2 { right: 24%; top: 40%; animation: puckFloat 7s ease-in-out infinite; }
.p3 { left: 52%; bottom: 18%; animation: puckFloat 8s ease-in-out infinite reverse; }

.layer-stack { margin-top: 28px; display: grid; gap: 12px; }
.layer-stack div {
  height: 54px;
  border-radius: 18px;
  border: 2px solid rgba(176,138,69,.54);
  background: #28231b;
  position: relative;
  overflow: hidden;
}
.layer-stack span {
  position: absolute;
  z-index: 2;
  left: 16px;
  top: 15px;
  font-family: var(--mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.layer-stack b {
  display: block;
  height: 100%;
  width: 72%;
  background: linear-gradient(90deg, var(--olive), var(--brass), var(--oxide));
  transform-origin: left;
  animation: layerPulse 4s ease-in-out infinite;
}
.layer-stack div:nth-child(2) b { width: 48%; animation-delay: .4s; }
.layer-stack div:nth-child(3) b { width: 88%; animation-delay: .8s; }
.layer-stack div:nth-child(4) b { width: 36%; animation-delay: 1.2s; }

.band { position: absolute; left: -10%; width: 120%; height: 54px; border-radius: 50%; opacity: .78; mix-blend-mode: screen; }
.band-a { top: 28%; background: var(--brass); transform: rotate(-18deg); }
.band-b { top: 48%; background: var(--oxide); transform: rotate(12deg); }
.band-c { top: 67%; background: var(--teal); transform: rotate(-7deg); }
.strata-map .hud-label { top: 18%; right: 12%; }

.ticket-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 24px;
}
.ticket {
  min-height: 230px;
  padding: 24px;
  border-radius: 28px;
  border: 3px solid var(--brass);
  background:
    linear-gradient(90deg, transparent 0 18px, rgba(23,21,18,.16) 19px 21px, transparent 22px),
    var(--cream);
  color: var(--carbon);
  box-shadow: 0 28px 42px rgba(0,0,0,.36);
  transition: transform .25s ease, box-shadow .25s ease;
  cursor: default;
}
.ticket:hover { transform: scale(1.055) rotate(-1deg); box-shadow: 0 34px 52px rgba(198,106,50,.28); }
.ticket span, .ticket em { display: block; font-family: var(--mono); font-style: normal; text-transform: uppercase; letter-spacing: .12em; font-size: .74rem; }
.ticket strong { display: block; margin: 18px 0; font-family: var(--display); font-size: clamp(3rem, 6vw, 6rem); line-height: .85; letter-spacing: -.07em; }
.ticket.orange { background-color: var(--oxide); color: var(--cream); }
.ticket.teal { background-color: var(--teal); color: var(--cream); }
.ticket.brass { background-color: var(--brass); }

.orbit-map { border-radius: 50%; aspect-ratio: 1; min-height: auto; width: min(70vh, 720px); justify-self: center; }
.planet { border-radius: 50%; animation: planetTurn 18s linear infinite; }
.orbit-ring {
  position: absolute;
  inset: 15%;
  border: 2px solid rgba(53,107,111,.75);
  border-radius: 50%;
  transform: rotateX(65deg) rotateZ(15deg);
  animation: orbitSpin 10s linear infinite;
}
.r2 { inset: 25%; border-color: rgba(176,138,69,.78); animation-duration: 14s; }
.r3 { inset: 35%; border-style: dashed; border-color: rgba(239,225,193,.5); animation-duration: 18s; }
.moon { top: 18%; right: 17%; animation: puckFloat 5s ease-in-out infinite; }
.orbit-label { left: 9%; bottom: 19%; }

.receipt-terminal {
  align-self: end;
  min-height: 620px;
  position: relative;
  border-radius: 34px 34px 0 0;
  background: linear-gradient(180deg, #2b251d, #0f0e0c);
  border: 5px solid #0d0c0a;
  outline: 2px solid var(--brass);
  overflow: hidden;
  box-shadow: 0 38px 70px rgba(0,0,0,.48);
}
.slot {
  position: absolute;
  top: 76px;
  left: 10%;
  right: 10%;
  height: 34px;
  border-radius: 100px;
  background: #050504;
  box-shadow: inset 0 10px 12px rgba(0,0,0,.9), 0 0 0 3px var(--brass);
}
.receipt {
  position: absolute;
  top: 96px;
  left: 17%;
  right: 17%;
  padding: 34px 30px 44px;
  min-height: 480px;
  background: var(--cream);
  color: var(--carbon);
  font-family: "IBM Plex Mono", var(--mono);
  box-shadow: 0 24px 45px rgba(0,0,0,.38);
  transform: translateY(90px);
  animation: receiptFeed 4.8s ease-out infinite alternate;
}
.receipt p { font-size: .95rem; border-bottom: 1px dashed rgba(23,21,18,.35); padding-bottom: 12px; }
.receipt h3 { font-family: var(--display); font-size: clamp(2rem, 4vw, 4rem); line-height: .95; letter-spacing: -.05em; }

@keyframes tickerDrift { to { transform: translateX(-50%); } }
@keyframes bulbBlink { 50% { background: var(--oxide); box-shadow: 0 0 18px var(--oxide); } }
@keyframes scanSweep { 0%, 100% { transform: translateX(-160px) rotate(22deg); opacity: .3; } 50% { transform: translateX(460px) rotate(22deg); opacity: 1; } }
@keyframes puckFloat { 50% { translate: 0 -16px; } }
@keyframes layerPulse { 0%, 100% { transform: scaleX(.7); } 50% { transform: scaleX(1); } }
@keyframes planetTurn { to { transform: rotate(360deg); } }
@keyframes orbitSpin { to { transform: rotateX(65deg) rotateZ(375deg); } }
@keyframes receiptFeed { to { transform: translateY(0); } }

@media (max-width: 980px) {
  .ticker-rail { grid-template-columns: 1fr; height: auto; min-height: 96px; padding: 10px 0; }
  .ticker-window, .rail-coordinate { display: none; }
  .spine { position: sticky; top: 96px; left: 0; bottom: auto; width: auto; height: auto; display: flex; gap: 8px; overflow-x: auto; padding: 8px; border-right: 0; border-bottom: 3px solid var(--brass); }
  .spine-tab { min-width: 150px; margin: 0; }
  .spine-meter { display: none; }
  .briefing { margin-left: 0; }
  .chapter { grid-template-columns: 1fr; padding: 34px 18px; }
  .ticket-board { grid-template-columns: 1fr; }
  .orbit-map { width: 100%; }
}