:root {
  color-scheme: dark;
  --ink: #edf0e9;
  --muted: #aab5ad;
  --night: #091417;
  --road: #14292b;
  --amber: #ffb95c;
  --cyan: #88e0db;
  --alarm: #ff6d5a;
  --line: rgba(237, 240, 233, 0.28);
  --safe-top: max(18px, env(safe-area-inset-top));
  --safe-right: max(18px, env(safe-area-inset-right));
  --safe-bottom: max(18px, env(safe-area-inset-bottom));
  --safe-left: max(18px, env(safe-area-inset-left));
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--night);
  overscroll-behavior-y: none;
  scrollbar-color: var(--amber) #071012;
  scrollbar-width: thin;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100%;
  overflow-x: hidden;
  background: var(--night);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

button,
a {
  font: inherit;
}

button {
  color: inherit;
}

.chronology {
  height: 720vh;
  min-height: 4600px;
}

.stage {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
  isolation: isolate;
  background: var(--night);
}

#scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.grain {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.12;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

.mast {
  position: absolute;
  inset: var(--safe-top) var(--safe-right) auto var(--safe-left);
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.archive-link {
  color: var(--ink);
  text-decoration: none;
  pointer-events: auto;
  font: 700 0.68rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.82;
}

.archive-link:focus-visible,
button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.frame-count {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 700 0.66rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.frame-count i {
  display: block;
  width: 36px;
  height: 1px;
  background: var(--line);
}

.title-card {
  position: absolute;
  z-index: 5;
  top: clamp(76px, 11vh, 118px);
  left: var(--safe-left);
  width: min(430px, calc(100vw - 120px));
  pointer-events: none;
  transition: opacity 300ms ease, transform 400ms ease;
}

.title-card.quiet {
  opacity: 0.16;
  transform: translateY(-8px);
}

.kicker,
.decision-step,
.ending-label,
.evidence-time {
  margin: 0 0 10px;
  font: 700 0.66rem/1.1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

h1 {
  margin: 0;
  max-width: 12ch;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.75rem, 5.6vw, 5.7rem);
  font-weight: 400;
  line-height: 0.84;
  letter-spacing: -0.065em;
  text-wrap: balance;
}

.dek {
  margin: 18px 0 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(0.95rem, 1.5vw, 1.2rem);
  font-style: italic;
}

.time-rail {
  position: absolute;
  z-index: 6;
  top: 50%;
  right: var(--safe-right);
  width: 50px;
  transform: translateY(-50%);
}

.time-rail > p {
  margin: 0 0 12px;
  color: var(--ink);
  font: 700 0.58rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.04em;
  text-align: right;
  white-space: nowrap;
  transform: translateX(-2px);
}

.time-rail ol {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.time-rail li {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 28px;
  height: 10px;
  border-top: 1px solid rgba(237, 240, 233, 0.26);
  color: transparent;
  transition: width 180ms ease, border-color 180ms ease;
}

.time-rail li.passed {
  border-color: var(--amber);
}

.time-rail li.active {
  width: 50px;
  border-color: var(--ink);
  color: var(--ink);
}

.time-rail li span {
  margin-top: -13px;
  font: 700 0.5rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.evidence {
  position: absolute;
  z-index: 6;
  left: var(--safe-left);
  bottom: calc(var(--safe-bottom) + 22px);
  width: min(390px, calc(100vw - 112px));
  padding: 15px 18px 16px;
  border-left: 2px solid var(--amber);
  background: linear-gradient(90deg, rgba(6, 16, 18, 0.88), rgba(6, 16, 18, 0.4) 78%, transparent);
  backdrop-filter: blur(8px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.evidence.swap {
  opacity: 0;
  transform: translateY(6px);
}

.evidence-time {
  margin-bottom: 7px;
}

.evidence h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.25rem, 2.4vw, 2rem);
  font-weight: 400;
  line-height: 1;
}

.evidence > p:last-child {
  margin: 8px 0 0;
  max-width: 42ch;
  color: var(--muted);
  font-size: clamp(0.77rem, 1.2vw, 0.94rem);
  line-height: 1.42;
}

.scrub-cue {
  position: absolute;
  z-index: 7;
  right: calc(var(--safe-right) + 72px);
  bottom: calc(var(--safe-bottom) + 22px);
  display: grid;
  grid-template-columns: 26px auto;
  align-items: center;
  min-height: 48px;
  color: var(--ink);
  font: 700 0.7rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scrub-cue small {
  grid-column: 2;
  margin-top: -4px;
  color: var(--muted);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.cue-arrow {
  grid-row: span 2;
  font-size: 1.2rem;
  animation: nudge 1.4s ease-in-out infinite;
}

@keyframes nudge {
  50% { transform: translateY(-5px); }
}

.decision,
.ending {
  position: absolute;
  z-index: 12;
  top: 50%;
  left: 50%;
  width: min(780px, calc(100vw - 36px));
  max-height: calc(100svh - 128px);
  overflow-y: auto;
  padding: clamp(20px, 4vw, 40px);
  transform: translate(-50%, -50%);
  border: 1px solid rgba(237, 240, 233, 0.32);
  background: rgba(7, 17, 19, 0.94);
  box-shadow: 0 24px 90px rgba(0, 0, 0, 0.56);
  backdrop-filter: blur(16px);
}

.decision[hidden],
.ending[hidden],
.split-labels[hidden],
.scrub-cue[hidden],
.evidence[hidden] {
  display: none;
}

.decision h2,
.ending h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 5vw, 4.6rem);
  font-weight: 400;
  line-height: 0.94;
  letter-spacing: -0.045em;
}

.decision > p:not(.decision-step),
.ending > p:not(.ending-label) {
  margin: 14px 0 24px;
  max-width: 54ch;
  color: var(--muted);
  line-height: 1.5;
}

.choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.choices button,
.ending button {
  position: relative;
  min-height: 72px;
  border: 1px solid rgba(237, 240, 233, 0.26);
  border-radius: 0;
  background: rgba(237, 240, 233, 0.04);
  padding: 14px 14px 12px 48px;
  text-align: left;
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.choices button:hover,
.choices button:focus-visible,
.ending button:hover,
.ending button:focus-visible {
  border-color: var(--cyan);
  background: rgba(136, 224, 219, 0.09);
}

.choices button:active,
.ending button:active {
  transform: translateY(1px);
}

.choices button > span {
  position: absolute;
  top: 16px;
  left: 14px;
  color: var(--amber);
  font: 700 0.62rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.choices button small {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font: 500 0.64rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ending {
  width: min(610px, calc(100vw - 36px));
}

.ending button {
  min-height: 48px;
  padding: 12px 16px;
  color: var(--ink);
  font: 700 0.7rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.split-labels {
  position: absolute;
  z-index: 7;
  top: calc(var(--safe-top) + 40px);
  left: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  pointer-events: none;
}

.split-labels span {
  padding: 0 28px;
  color: var(--amber);
  font: 700 0.6rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.split-labels span:last-child {
  color: var(--cyan);
  text-align: right;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

noscript {
  position: fixed;
  inset: 20px;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 30px;
  background: var(--night);
  color: var(--ink);
  text-align: center;
}

@media (max-width: 720px) {
  .title-card {
    top: 72px;
    width: calc(100vw - 82px);
  }

  h1 {
    font-size: clamp(2.7rem, 13vw, 4.7rem);
  }

  .dek {
    margin-top: 12px;
  }

  .time-rail {
    right: 12px;
  }

  .evidence {
    left: 12px;
    bottom: calc(var(--safe-bottom) + 58px);
    width: calc(100vw - 70px);
    padding: 12px 14px;
  }

  .scrub-cue {
    right: auto;
    left: 14px;
    bottom: calc(var(--safe-bottom) + 8px);
  }

  .choices {
    grid-template-columns: 1fr;
  }

  .decision {
    padding: 22px 18px;
  }

  .decision > p:not(.decision-step) {
    margin-bottom: 16px;
    font-size: 0.88rem;
  }

  .choices button {
    min-height: 60px;
  }

  .split-labels span {
    padding: 0 12px;
  }
}

@media (min-width: 721px) {
  .time-rail {
    top: calc(var(--safe-top) + 42px);
    right: var(--safe-right);
    width: min(350px, 34vw);
    transform: none;
  }

  .time-rail > p {
    margin: 0 0 8px;
    text-align: right;
    transform: none;
  }

  .time-rail ol {
    flex-direction: row;
    justify-content: flex-end;
    gap: 8px;
  }

  .time-rail li {
    width: 32px;
    height: 12px;
  }

  .time-rail li.active {
    width: 58px;
  }

  .split-labels {
    top: calc(var(--safe-top) + 84px);
  }
}

@media (max-height: 650px) and (min-width: 721px) {
  .title-card {
    top: 60px;
  }

  h1 {
    font-size: clamp(2.6rem, 7.4vh, 4rem);
  }

  .evidence {
    bottom: 14px;
  }

  .scrub-cue {
    bottom: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}