/* ---------- foundations ---------- */
:root{
  --bg: #0a0a12;
  --bg-2: #0d0e1a;
  --ink: #f3ede1;
  --ink-dim: #9b96a8;
  --accent: #f4b942;
  --line: rgba(243,237,225,0.14);
  --serif: "Fraunces", "Iowan Old Style", serif;
  --mono: "Space Mono", "SFMono-Regular", monospace;
  --sans: "Archivo", -apple-system, sans-serif;
  --display: "Italiana", "Fraunces", serif;
}

*{ box-sizing: border-box; }

html, body{
  margin:0;
  padding:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  scroll-behavior: smooth;
}

body{
  overflow-x: hidden;
}

body:not(.revealed) .fact{
  display: none;
}

.sr-only{
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}

#starfield{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.glow{
  position: fixed;
  top: -20vh;
  left: 50%;
  transform: translateX(-50%);
  width: 140vw;
  height: 90vh;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%);
  filter: blur(10px);
  z-index: 0;
  pointer-events: none;
  transition: background 900ms ease;
}

.grain{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

.progress{
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255,255,255,0.06);
  z-index: 50;
}
.progress-fill{
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: background 900ms ease, width 80ms linear;
}

.rail{
  position: fixed;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: none;
  flex-direction: column;
  gap: 13px;
}
body.revealed .rail{ display: flex; }
.rail-dot{
  width: 8px;
  height: 8px;
  border-radius: 5px;
  border: none;
  padding: 0;
  background: rgba(243,237,225,0.25);
  cursor: pointer;
  transition: all 280ms cubic-bezier(.16,1,.3,1);
}
.rail-dot:hover{ background: rgba(243,237,225,0.55); }
.rail-dot.active{
  background: var(--accent);
  height: 24px;
}
@media (max-width: 900px){
  .rail{ display: none !important; }
}

.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms cubic-bezier(.16,1,.3,1), transform 700ms cubic-bezier(.16,1,.3,1);
}
.reveal.in-view{
  opacity: 1;
  transform: translateY(0);
}

main#story{
  position: relative;
  z-index: 1;
}

/* ---------- shared section chrome ---------- */
section{
  min-height: 100svh;
  width: 100%;
  padding: 8vh 6vw 10vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  border-top: 1px solid var(--line);
}

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.6rem;
  transition: color 900ms ease;
}
.idx{
  font-weight: 700;
  border: 1px solid currentColor;
  padding: 0.15em 0.5em;
  border-radius: 2px;
}

.fact-title{
  font-family: var(--serif);
  font-weight: 600;
  font-optical-sizing: auto;
  font-size: clamp(1.9rem, 4.4vw, 3.4rem);
  line-height: 1.05;
  margin: 0 0 1.2rem;
  max-width: 18ch;
}

.fact-sub{
  font-family: var(--serif);
  font-style: normal;
  font-weight: 400;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: color-mix(in srgb, var(--ink) 72%, transparent);
  max-width: 56ch;
  line-height: 1.55;
  margin: -0.4rem 0 2rem;
}
.fact-footnote{
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-dim);
  margin-top: 2rem;
  opacity: 0.7;
}

/* ---------- hero ---------- */
.hero{
  align-items: center;
  text-align: center;
  border-top: none;
}
.hero-frame{
  max-width: 640px;
}
.wordmark{
  font-family: var(--display);
  font-weight: 400;
  font-style: normal;
  font-size: clamp(3.2rem, 12vw, 7rem);
  letter-spacing: 0.1em;
  margin: 0.5rem 0 1.5rem;
  background: linear-gradient(180deg, var(--ink) 40%, color-mix(in srgb, var(--accent) 70%, var(--ink)) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub{
  font-family: var(--serif);
  font-style: normal;
  font-weight: 400;
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  color: color-mix(in srgb, var(--ink) 75%, transparent);
  line-height: 1.55;
  margin: 0 auto 2.6rem;
  max-width: 42ch;
}

.date-form{
  display: flex;
  align-items: center;
  gap: 1.1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.date-input-group{
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  border: none;
  padding: 0;
  margin: 0;
}
.date-seg{
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--line);
  color: var(--ink);
  text-align: center;
  width: 2.2ch;
  padding: 0.3rem 0.15rem;
  border-radius: 0;
  transition: border-color 220ms ease;
}
.date-seg-year{ width: 4.4ch; }
.date-seg::placeholder{ color: var(--ink-dim); opacity: 0.55; }
.date-seg:focus{
  outline: none;
  border-color: var(--accent);
}
.date-sep{
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  color: var(--ink-dim);
  opacity: 0.5;
}
.date-form button{
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  background: var(--accent);
  color: #100c02;
  border: none;
  padding: 0.9rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease;
}
.date-form button:hover{
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -10px color-mix(in srgb, var(--accent) 70%, transparent);
}
.hero-note{
  min-height: 1.4em;
  color: #ff8a8a;
  font-family: var(--mono);
  font-size: 0.85rem;
  margin-top: 1rem;
}
.hero-scroll-hint{
  position: absolute;
  bottom: 4vh;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  opacity: 0;
  animation: fadeUp 1200ms ease 400ms forwards, bob 2600ms ease-in-out 1600ms infinite;
}
@keyframes fadeUp{ from{opacity:0; transform:translate(-50%, 10px);} to{opacity:0.7; transform:translate(-50%,0);} }
@keyframes bob{ 0%,100%{transform:translate(-50%,0);} 50%{transform:translate(-50%,6px);} }

/* ---------- big numbers ---------- */
.bignum{
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(3.2rem, 13vw, 9rem);
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.bignum-label{
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 2.4rem;
  transition: color 900ms ease;
}

.chipline{
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}
.chip{
  font-family: var(--mono);
  font-size: 0.8rem;
  border: 1px solid var(--line);
  padding: 0.4em 0.8em;
  border-radius: 100px;
  color: var(--ink-dim);
}
.chip b{ color: var(--ink); font-weight: 700; }

.mini-grid{
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  max-width: 900px;
}
.mini-cell{
  background: var(--bg);
  padding: 1.4rem 1.2rem;
  flex: 1 1 180px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.mini-cell .v{
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  display: block;
}
.mini-cell .l{
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

/* ---------- life in weeks ---------- */
.lifegrid-wrap{
  max-width: 900px;
  margin-bottom: 2rem;
}
.lifegrid-legend{
  display: flex;
  gap: 1.4rem;
  margin-bottom: 0.9rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-dim);
}
.lifegrid-legend span{
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}
.sw{
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}
.sw-lived{ background: var(--accent); }
.sw-ahead{ background: rgba(255,255,255,0.08); }
.sw-bonus{ background: #ffd166; }
.legend-bonus{ display: none; }
.legend-bonus.show{ display: inline-flex; }
.lifegrid{
  display: grid;
  grid-template-columns: repeat(52, 1fr);
  gap: 2px;
}
.lifegrid .wk{
  aspect-ratio: 1;
  background: rgba(255,255,255,0.06);
  border-radius: 1px;
}
.lifegrid .wk.lived{
  background: var(--accent);
  transition: background 900ms ease;
}
.lifegrid .wk.bonus{
  background: #ffd166;
  animation: pulseGlow 3.2s ease-in-out infinite;
}
.lifebar-wrap{ max-width: 900px; }
.lifebar{
  height: 10px;
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
  overflow: hidden;
}
.lifebar-fill{
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 1200ms cubic-bezier(.16,1,.3,1), background 900ms ease;
}
.lifebar-fill.bonus{
  background: linear-gradient(90deg, var(--accent), #ffd166);
}
.lifebar-label{
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-dim);
  margin-top: 0.6rem;
}

/* ---------- card grids ---------- */
.card-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  max-width: 1100px;
}
.fcard{
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.4rem 1.4rem 1.6rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0));
  position: relative;
  overflow: hidden;
  transition: transform 220ms cubic-bezier(.16,1,.3,1), border-color 220ms ease, background 220ms ease;
}
.fcard::before{
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0.35;
  transition: opacity 220ms ease, background 900ms ease;
}
.fcard:hover{
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--line));
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0));
}
.fcard:hover::before{ opacity: 1; }
.fcard .icon{
  width: 42px;
  height: 42px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  transition: background 900ms ease, color 900ms ease;
}
.fcard .icon svg{
  width: 20px;
  height: 20px;
}
.fcard.next{
  border-color: var(--accent);
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, transparent), rgba(255,255,255,0));
}
.fcard .tag{
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25em 0.6em;
  border-radius: 100px;
  border: 1px solid currentColor;
  color: var(--accent);
}
.fcard .tag.tag-static{
  position: static;
  display: inline-block;
  margin-bottom: 0.8rem;
}
.fcard .stat{
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  display: block;
  margin-bottom: 0.3rem;
  color: var(--ink);
}
.fcard .name{
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  transition: color 900ms ease;
}
.fcard .desc{
  font-family: var(--serif);
  font-style: normal;
  font-weight: 400;
  font-size: 0.98rem;
  color: color-mix(in srgb, var(--ink) 68%, transparent);
  margin-top: 0.6rem;
  line-height: 1.5;
}

.bar-compare{
  margin: 1rem 0 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.bar-row{
  display: grid;
  grid-template-columns: 34px 1fr 48px;
  align-items: center;
  gap: 0.6rem;
}
.bar-label{
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.bar-track{
  height: 7px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.bar-fill{
  height: 100%;
  border-radius: 10px;
  transition: width 1000ms cubic-bezier(.16,1,.3,1);
}
.bar-fill.you{ background: var(--accent); }
.bar-fill.them{ background: rgba(255,255,255,0.3); }
.bar-value{
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-dim);
  text-align: right;
}

/* ---------- planets row ---------- */
.orbit-row{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  max-width: 1100px;
}
.planet{
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.8rem 1rem 1.6rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0));
  transition: transform 220ms cubic-bezier(.16,1,.3,1), border-color 220ms ease, background 220ms ease;
}
.planet::before{
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0.35;
  transition: opacity 220ms ease, background 900ms ease;
}
.planet:hover{
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--line));
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0));
}
.planet:hover::before{ opacity: 1; }
.planet .dot{
  width: 30px; height: 30px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: pulseGlow 3.2s ease-in-out infinite;
}
@keyframes pulseGlow{
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.35); }
}
.planet .age{
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.5rem;
  display: block;
}
.planet .unit{
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.planet .pname{
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-top: 0.6rem;
  display: block;
}

/* ---------- timeline ---------- */
.timeline-wrap{
  max-width: 1100px;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.5rem 0 2.2rem;
  margin-bottom: 1rem;
}
.timeline{
  position: relative;
  height: 40px;
  min-width: 720px;
  margin: 50px 30px 0;
}
.timeline-track{
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--line);
  transform: translateY(-50%);
}
.timeline-progress{
  position: absolute;
  top: 50%;
  left: 0;
  height: 2px;
  background: var(--accent);
  transform: translateY(-50%);
  transition: width 1400ms cubic-bezier(.16,1,.3,1), background 900ms ease;
}
.tl-point{
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.tl-dot{
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  box-sizing: border-box;
}
.tl-point.reached .tl-dot{ background: var(--accent); }
.tl-point.next .tl-dot{
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent);
  animation: pulseRing 2.4s ease-in-out infinite;
}
@keyframes pulseRing{
  0%, 100% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent); }
  50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--accent) 12%, transparent); }
}
.tl-label{
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--ink-dim);
  white-space: nowrap;
}
.tl-point.today{ z-index: 5; }
.tl-point.today .tl-dot{
  width: 12px; height: 12px;
  background: var(--ink);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 35%, transparent);
}
.tl-point.today .tl-label{ color: var(--accent); font-weight: 700; }
.tl-point.golden{ top: calc(50% + 24px); gap: 6px; }
.tl-point.golden .tl-dot{
  background: transparent;
  border: 2px solid var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
  width: 8px; height: 8px;
}
.tl-point.golden .tl-label{ color: var(--accent); }

/* ---------- deep time (vertical, to scale) ---------- */
.vtimeline{
  position: relative;
  max-width: 640px;
  margin-bottom: 1.5rem;
  /* height set inline via JS to match the computed, to-scale layout */
}
.vtimeline::before{
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
}
.vt-tick{
  position: absolute;
  left: 0;
  width: 12px;
  height: 2px;
  background: var(--line);
}
.vt-item{
  position: absolute;
  left: 34px;
  right: 0;
}
.vt-dot{
  position: absolute;
  left: -28px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  transition: background 900ms ease;
}
.vt-title{
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  display: block;
}
.vt-meta{
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent);
  transition: color 900ms ease;
}
.vt-desc{
  font-size: 0.92rem;
  color: var(--ink-dim);
  margin: 0.35rem 0 0;
  max-width: 50ch;
  line-height: 1.5;
}
.vt-item.you .vt-dot{
  width: 4px;
  height: 4px;
  left: -26px;
  top: 9px;
  background: var(--ink);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);
}
.vt-item.you .vt-title{ color: var(--accent); }

.deeptime-callout{
  margin-top: 2rem;
  max-width: 640px;
}
.deeptime-callout .bignum{ font-size: clamp(2.4rem, 8vw, 5rem); }

/* ---------- share ---------- */
.share{
  align-items: center;
  text-align: center;
}
#shareCanvas{
  width: min(340px, 70vw);
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 30px 80px -30px rgba(0,0,0,0.6);
  margin-bottom: 2rem;
}
.share-actions{
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.share-actions button{
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.9rem 1.6rem;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--accent);
  color: #100c02;
}
.share-actions button.ghost{
  background: transparent;
  color: var(--ink);
}

@media (max-width: 640px){
  .lifegrid{ grid-template-columns: repeat(26, 1fr); }
  section{ padding: 7vh 6vw 8vh; }
}