/* TAPROOT: tokens first. Every colour, size and motion value comes from here. */
:root {
  --basalt: #12110F;
  --basalt-2: #1A1815;
  --basalt-3: #23201C;
  --paper: #E9E4D8;
  --paper-mute: rgba(233, 228, 216, 0.62);
  --paper-faint: rgba(233, 228, 216, 0.32);
  --rule: rgba(233, 228, 216, 0.16);
  --ochre: #C8894A;
  --sienna: #9C4A2A;
  --sage: #8A9478;
  --heat: #D4693A;
  --signal: #8FD3FF;
  --signal-dim: rgba(143, 211, 255, 0.22);

  --display: 'Archivo', 'Helvetica Neue', sans-serif;
  --serif: 'Newsreader', Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --gutter: clamp(16px, 4vw, 64px);
  --bar-h: 72px;
  --track-display: 0.3em;
  --track-mono: 0.08em;

  --ease-settle: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-draw: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-dissolve: cubic-bezier(0.4, 0, 0.2, 1);
  --quick: 220ms;
  --beat: 720ms;
  --phrase: 1600ms;
}

* { box-sizing: border-box; }
html { background: var(--basalt); }
body {
  margin: 0;
  background: var(--basalt);
  color: var(--paper);
  font: 400 clamp(16px, 1.15vw, 19px)/1.6 var(--serif);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-loading { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
::selection { background: var(--signal); color: var(--basalt); }

/* Film grain over everything, very quiet */
body::after {
  content: ''; position: fixed; inset: -50%; z-index: 90; pointer-events: none; opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 0.9s steps(6) infinite;
}
@keyframes grain { 0%{transform:translate(0,0)} 20%{transform:translate(-3%,2%)} 40%{transform:translate(2%,-3%)} 60%{transform:translate(-2%,-1%)} 80%{transform:translate(3%,3%)} 100%{transform:translate(0,0)} }

h1, h2 {
  font-family: var(--display);
  font-stretch: 125%;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--track-display);
  line-height: 1.05;
  margin: 0;
}
h2 { font-size: clamp(26px, 3.2vw, 54px); }
.ch { display: inline-block; will-change: transform; }
.word { display: inline-block; white-space: nowrap; overflow: hidden; vertical-align: top; padding-bottom: 0.08em; }

.btn {
  display: inline-block; font: 500 13px/1 var(--mono); letter-spacing: var(--track-mono); text-decoration: none;
  border: 1px solid var(--paper-mute); padding: 15px 22px; position: relative; overflow: hidden; z-index: 0;
  transition: color var(--quick) var(--ease-settle), border-color var(--quick);
}
.btn::before { content: ''; position: absolute; inset: 0; background: var(--paper); transform: scaleX(0); transform-origin: left; transition: transform var(--beat) var(--ease-settle); z-index: -1; }
.btn:hover, .btn:focus-visible { color: var(--basalt); border-color: var(--paper); }
.btn:hover::before, .btn:focus-visible::before { transform: scaleX(1); }

/* Loader */
.loader { position: fixed; inset: 0; z-index: 100; background: var(--basalt); display: grid; place-items: center; align-content: center; gap: 28px; }
.loader-mark { width: 120px; height: 120px; color: var(--paper); }
.loader-line { width: 180px; height: 1px; background: var(--rule); }
.loader-line span { display: block; height: 100%; width: 0; background: var(--signal); box-shadow: 0 0 8px var(--signal); }

/* Reticle cursor (fine pointers only) */
.reticle { position: fixed; left: 0; top: 0; z-index: 95; pointer-events: none; width: 0; height: 0; display: none; }
@media (pointer: fine) {
  html.has-reticle, html.has-reticle a, html.has-reticle button, html.has-reticle input { cursor: none; }
  html.has-reticle .reticle { display: block; }
}
.reticle-ring {
  position: absolute; left: -16px; top: -16px; width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--paper);
  transition: width var(--beat) var(--ease-settle), height var(--beat) var(--ease-settle), left var(--beat) var(--ease-settle), top var(--beat) var(--ease-settle), border-color var(--quick), background var(--quick);
}
.reticle-ring::before, .reticle-ring::after { content: ''; position: absolute; background: var(--paper); }
.reticle-ring::before { left: 50%; top: -7px; width: 1px; height: 6px; }
.reticle-ring::after { top: 50%; left: -7px; height: 1px; width: 6px; }
.reticle.is-link .reticle-ring { width: 56px; height: 56px; left: -28px; top: -28px; border-color: var(--signal); background: rgba(143,211,255,0.08); }
.reticle.is-lens .reticle-ring { width: 0; height: 0; left: 0; top: 0; border-color: transparent; }
.reticle-label { position: absolute; left: 22px; top: 18px; font: 500 11px/1 var(--mono); letter-spacing: 0.12em; color: var(--signal); opacity: 0; transition: opacity var(--quick); white-space: nowrap; }
.reticle.is-lens .reticle-label { opacity: 1; left: 120px; top: 110px; }

/* Bar: an instrument, not a menu */
.bar {
  position: fixed; inset: 0 0 auto 0; z-index: 40; height: var(--bar-h);
  display: grid; grid-template-columns: auto 1fr auto auto; align-items: center; gap: 36px;
  padding: 0 var(--gutter);
  background: linear-gradient(rgba(18,17,15,0.86), rgba(18,17,15,0));
  transition: transform var(--beat) var(--ease-settle);
}
.bar.is-hidden, body.is-loading .bar { transform: translateY(-100%); }
.lockup { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.lockup-mark { width: 38px; height: 38px; }
.lockup span { font: 600 15px/1 var(--display); font-stretch: 125%; letter-spacing: 0.42em; }
.spine-nav { position: relative; display: flex; justify-content: space-between; align-items: center; height: 100%; max-width: 860px; justify-self: center; width: 100%; }
.spine-track { position: absolute; left: 11px; right: 11px; top: 50%; height: 1px; background: var(--rule); }
.spine-fill { position: absolute; left: 0; top: 0; height: 100%; width: 0; background: var(--signal); box-shadow: 0 0 10px var(--signal); }
.spine-nav a { position: relative; z-index: 1; display: grid; place-items: center; width: 22px; height: 22px; text-decoration: none; }
.spine-nav i { width: 7px; height: 7px; border-radius: 50%; background: var(--basalt); border: 1px solid var(--paper-faint); transition: transform var(--beat) var(--ease-settle), background var(--quick), border-color var(--quick), box-shadow var(--beat); }
.spine-nav b { position: absolute; top: calc(50% + 14px); left: 50%; transform: translate(-50%, 4px); font: 500 10px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; white-space: nowrap; color: var(--paper-mute); opacity: 0; transition: opacity var(--quick), transform var(--beat) var(--ease-settle); }
.spine-nav a:hover b, .spine-nav a.is-on b { opacity: 1; transform: translate(-50%, 0); }
.spine-nav a.is-past i { background: var(--signal); border-color: var(--signal); }
.spine-nav a.is-on i { transform: scale(1.8); background: var(--basalt); border-color: var(--signal); box-shadow: 0 0 0 3px var(--signal-dim); }
.readout { margin: 0; display: flex; align-items: baseline; gap: 10px; font: 500 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--paper-mute); }
.readout b { font: 400 22px/1 var(--mono); letter-spacing: 0.02em; color: var(--paper); min-width: 3.2em; }
.menu-btn { display: grid; gap: 6px; align-items: center; grid-template-columns: 22px auto; grid-template-rows: auto auto; column-gap: 12px; }
.menu-btn span { grid-column: 1; height: 1px; width: 22px; background: var(--paper); transition: transform var(--beat) var(--ease-settle), width var(--beat) var(--ease-settle); }
.menu-btn span:nth-child(2) { width: 14px; }
.menu-btn em { grid-column: 2; grid-row: 1 / 3; font: 500 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; font-style: normal; }
.menu-btn[aria-expanded='true'] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-btn[aria-expanded='true'] span:nth-child(2) { width: 22px; transform: translateY(-3.5px) rotate(-45deg); }

/* Full-screen menu */
.menu { position: fixed; inset: 0; z-index: 35; background: var(--basalt); display: grid; grid-template-columns: 7fr 5fr; align-items: center; gap: 4vw; padding: calc(var(--bar-h) + 4vh) var(--gutter) 6vh; clip-path: inset(0 0 100% 0); }
.menu[hidden] { display: grid; visibility: hidden; }
.menu-list { list-style: none; margin: 0; padding: 0; }
.menu-list li { overflow: hidden; border-bottom: 1px solid var(--rule); }
.menu-list a { display: block; padding: 1.1vh 0; text-decoration: none; font: 600 clamp(22px, 3.1vw, 50px)/1.1 var(--display); font-stretch: 125%; letter-spacing: 0.12em; text-transform: uppercase; color: var(--paper-mute); transition: color var(--quick), padding-left var(--beat) var(--ease-settle); }
.menu-list a:hover, .menu-list a:focus-visible { color: var(--paper); padding-left: 24px; }
.menu-thumb { margin: 0; aspect-ratio: 4 / 5; overflow: hidden; justify-self: end; width: min(100%, 460px); }
.menu-thumb img { width: 100%; height: 100%; object-fit: cover; }
.menu-foot { position: absolute; left: var(--gutter); bottom: 3vh; margin: 0; font: 400 12px/1 var(--mono); color: var(--paper-mute); }

/* Hero */
.hero { position: relative; height: 100vh; min-height: 640px; overflow: hidden; }
.stage, .stage-still { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.stage-still { display: none; }
.hero::after { content: ''; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(rgba(18,17,15,0.45), rgba(18,17,15,0) 28%, rgba(18,17,15,0) 55%, rgba(18,17,15,0.75)); }
.hero-type { position: absolute; inset: 0; z-index: 2; display: grid; place-items: center; align-content: center; text-align: center; pointer-events: none; }
.hero-mark { width: clamp(150px, 20vw, 340px); height: clamp(150px, 20vw, 340px); margin-bottom: -2vw; }
.wordmark { font-size: clamp(54px, 12vw, 220px); letter-spacing: 0.18em; margin-right: -0.18em; }
.tagline { font: 400 clamp(20px, 2.4vw, 42px)/1.2 var(--serif); margin: 0.4em 0 0; }
.scrubber { position: absolute; left: var(--gutter); right: var(--gutter); bottom: 28px; z-index: 3; }
.scrubber-line { position: relative; height: 1px; background: var(--paper-faint); }
.scrubber-fill { position: absolute; left: 0; top: 0; height: 1px; width: 0; background: var(--signal); box-shadow: 0 0 8px var(--signal); }
.scrubber-dot { position: absolute; top: -5px; left: 0; width: 11px; height: 11px; margin-left: -5px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px var(--signal-dim), 0 0 16px var(--signal); }
.scrubber-years { list-style: none; margin: 10px 0 0; padding: 0; display: flex; justify-content: space-between; font: 400 12px/1 var(--mono); letter-spacing: var(--track-mono); }
.plate-caption { font: 400 12px/1 var(--mono); color: var(--paper-mute); margin: 14px 0 0; }
.hero-hint { position: absolute; right: var(--gutter); bottom: 74px; z-index: 3; margin: 0; font: 400 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--signal); }

/* Shared annotation */
.notes { list-style: none; margin: 0; padding: 0; position: absolute; inset: 0; pointer-events: none; }
.notes li { position: absolute; left: var(--x); top: var(--y); font: 400 12px/1.2 var(--mono); letter-spacing: var(--track-mono); padding-left: 14px; transform: translateY(-50%); text-shadow: 0 1px 6px rgba(0,0,0,0.7); white-space: nowrap; }
.notes li::before { content: ''; position: absolute; left: -4px; top: 50%; width: 7px; height: 7px; margin-top: -3.5px; border-radius: 50%; border: 1px solid var(--paper); background: rgba(18,17,15,0.4); }
.notes li::after { content: ''; position: absolute; left: 3px; top: 50%; width: 9px; height: 1px; background: var(--paper); }

/* Premise */
.premise { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(24px, 4vw, 72px); align-items: end; padding: 18vh var(--gutter) 14vh; }
.premise-fig { position: relative; margin: 0; aspect-ratio: 16 / 9; overflow: hidden; }
.premise-fig img { width: 100%; height: 100%; object-fit: cover; }
.survey { position: absolute; inset: 0; width: 100%; height: 100%; }
.survey-line { fill: none; stroke: var(--paper); stroke-width: 1; opacity: 0.55; vector-effect: non-scaling-stroke; }
.survey-line.flag { stroke: var(--signal); stroke-width: 1.5; opacity: 0.9; stroke-dasharray: 6 5; filter: url(#glow); }
.premise-copy h2 { margin-bottom: 28px; }
.premise-copy p { max-width: 34em; color: var(--paper-mute); }

/* Story */
.story { position: relative; height: 600vh; }
.story-pin { position: sticky; top: 0; height: 100vh; display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: 1fr auto; gap: 0 clamp(20px, 3vw, 48px); padding: calc(var(--bar-h) + 24px) var(--gutter) 28px; }
.story-plate { position: relative; overflow: hidden; }
.act-plate { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; clip-path: inset(0 0 100% 0); transition: clip-path var(--phrase) var(--ease-draw); }
.act-plate.is-on { clip-path: inset(0 0 0 0); z-index: 1; }
.act-plate.was-on { clip-path: inset(0 0 0 0); z-index: 0; transition: none; }
.scanline { position: absolute; left: 0; right: 0; top: 0; height: 2px; z-index: 3; background: var(--signal); box-shadow: 0 0 18px 2px var(--signal); opacity: 0; }
.story-copy { position: relative; }
.act { position: absolute; inset: 0; opacity: 0; transform: translateY(16px); transition: opacity var(--beat) var(--ease-settle), transform var(--beat) var(--ease-settle); pointer-events: none; display: flex; flex-direction: column; justify-content: flex-end; }
.act.is-on { opacity: 1; transform: none; pointer-events: auto; }
.act h2 { font-size: clamp(22px, 2.3vw, 40px); margin-bottom: 18px; }
.act p { color: var(--paper-mute); margin: 0 0 22px; }
.act img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.year { position: absolute; right: var(--gutter); top: calc(var(--bar-h) + 24px); margin: 0; font: 300 clamp(40px, 5vw, 88px)/1 var(--mono); color: var(--paper); }
.rail { grid-column: 1 / -1; list-style: none; margin: 22px 0 0; padding: 14px 0 0; display: flex; justify-content: space-between; border-top: 1px solid var(--rule); }
.rail button { font: 500 12px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--paper-mute); position: relative; padding-left: 16px; }
.rail button::before { content: ''; position: absolute; left: 0; top: 50%; width: 7px; height: 7px; margin-top: -3.5px; border-radius: 50%; border: 1px solid var(--paper-mute); }
.rail button.is-on { color: var(--paper); }
.rail button.is-on::before { background: var(--signal); border-color: var(--signal); box-shadow: 0 0 10px var(--signal); }

/* Assembly */
.assembly { position: relative; height: 420vh; }
.assembly-pin { position: sticky; top: 0; height: 100vh; overflow: hidden; }
.asm { position: absolute; margin: 0; overflow: hidden; }
.asm img { width: 100%; height: 100%; object-fit: cover; }
.asm figcaption { position: absolute; left: 16px; bottom: 14px; font: 500 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; text-shadow: 0 1px 8px rgba(0,0,0,0.8); }
.asm-a, .asm-b { left: var(--gutter); top: calc(var(--bar-h) + 24px); width: 50vw; aspect-ratio: 16 / 9; }
.asm-b { clip-path: inset(0 100% 0 0); }
.asm-c { right: var(--gutter); bottom: 8vh; width: 38vw; aspect-ratio: 16 / 9; }
.asm-d { inset: 0; clip-path: circle(0% at 50% 55%); z-index: 3; }
.asm-d::after { content: ''; position: absolute; inset: 0; background: linear-gradient(rgba(18,17,15,0.5), rgba(18,17,15,0) 40%); }
.assembly-copy { position: absolute; right: var(--gutter); top: calc(var(--bar-h) + 24px); width: min(36vw, 560px); z-index: 4; }
.assembly-copy p { color: var(--paper-mute); margin-top: 22px; }

/* Metabolism */
.metabolism { position: relative; padding: 0 var(--gutter) 10vh; }
.ground-strip { height: 24vh; background: url('/taproot/img/w05-backbone.jpg') center 45% / cover; border-bottom: 1px solid var(--paper); margin: 0 calc(-1 * var(--gutter)) 40px; }
.metabolism-head { display: grid; grid-template-columns: 5fr 7fr; gap: 0 clamp(20px, 3vw, 56px); align-items: end; margin-bottom: 8px; }
.metabolism-head h2, .metabolism-head > p { grid-column: 1; }
.metabolism-head > p { color: var(--paper-mute); margin: 18px 0 0; }
.loops { grid-column: 2; grid-row: 1 / 3; align-self: end; justify-self: end; display: inline-flex; border: 1px solid var(--rule); border-radius: 999px; padding: 4px; }
.loops button { font: 500 12px/1 var(--mono); letter-spacing: var(--track-mono); padding: 11px 18px; border-radius: 999px; transition: background var(--quick), color var(--quick); }
.loops button[aria-selected='true'] { background: var(--paper); color: var(--basalt); }
.roots-wrap { position: relative; }
.roots { width: 100%; height: auto; overflow: visible; display: block; }
.roots .flow { fill: none; stroke-linecap: round; transition: opacity var(--beat) var(--ease-settle); filter: url(#glow); }
.roots .flow.power { stroke: var(--ochre); } .roots .flow.water { stroke: var(--sage); } .roots .flow.heat { stroke: var(--heat); } .roots .flow.data { stroke: var(--signal); }
.roots .grain { fill: #fff; }
.roots .dim { opacity: 0.1; }
.nodes { position: absolute; inset: 0; pointer-events: none; }
.node { position: absolute; transform: translate(-50%, -50%); text-align: center; pointer-events: auto; width: 180px; }
.node .disc { display: block; width: clamp(76px, 8.2vw, 132px); aspect-ratio: 1; border-radius: 50%; overflow: hidden; border: 1px solid var(--paper-faint); margin: 0 auto; box-shadow: 0 0 0 6px var(--basalt), 0 0 0 7px var(--rule); transition: transform var(--beat) var(--ease-settle), border-color var(--quick), box-shadow var(--beat); background: var(--basalt-2); }
.node .disc img { width: 100%; height: 100%; object-fit: cover; }
.node b { display: block; font: 500 13px/1.2 var(--mono); letter-spacing: 0.04em; margin-top: 12px; }
.node small { display: block; font: 400 10px/1.2 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--paper-mute); margin-top: 5px; }
.node:hover .disc, .node:focus-visible .disc { border-color: var(--signal); box-shadow: 0 0 0 6px var(--basalt), 0 0 0 7px var(--signal), 0 0 30px var(--signal-dim); }
.node .disc { transition: border-color var(--quick), box-shadow var(--beat); }
.node.dim { filter: opacity(0.18); }
.legend { display: flex; align-items: center; gap: 28px; border-top: 1px solid var(--rule); padding-top: 18px; margin-top: 10px; font: 500 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; }
.legend span::before { content: ''; display: inline-block; width: 28px; height: 2px; margin-right: 10px; vertical-align: middle; border-radius: 2px; }
.legend .power::before { background: var(--ochre); } .legend .water::before { background: var(--sage); } .legend .heat::before { background: var(--heat); } .legend .data::before { background: var(--signal); }
.node-note { margin: 0 0 0 auto; font: 400 13px/1.5 var(--mono); text-transform: none; letter-spacing: 0.02em; color: var(--paper-mute); max-width: 52ch; text-align: right; }

/* Architecture */
.architecture { padding: 10vh 0; }
.arch-fig { position: relative; margin: 0; overflow: hidden; }
.arch-fig img { width: 100%; }
.arch-copy { position: relative; display: grid; grid-template-columns: 5fr 5fr 2fr; gap: clamp(20px, 3vw, 56px); padding: 48px var(--gutter) 0; align-items: start; }
.arch-copy p { color: var(--paper-mute); margin: 0; }
.arch-float { position: absolute; right: var(--gutter); top: -14vw; width: 28vw; margin: 0; filter: drop-shadow(0 30px 40px rgba(0,0,0,0.6)); pointer-events: none; }

/* Blueprints */
.blueprints { padding: 12vh var(--gutter); }
.bp-head { display: grid; grid-template-columns: 5fr 7fr; gap: 0 clamp(20px, 3vw, 56px); align-items: end; margin-bottom: 32px; }
.bp-head h2, .bp-head > p { grid-column: 1; }
.bp-head > p { color: var(--paper-mute); margin: 18px 0 0; }
.bp-tabs { grid-column: 2; grid-row: 1 / 3; justify-self: end; display: inline-flex; gap: 4px; border: 1px solid var(--rule); border-radius: 999px; padding: 4px; }
.bp-tabs button { font: 500 12px/1 var(--mono); letter-spacing: var(--track-mono); padding: 11px 18px; border-radius: 999px; transition: background var(--quick), color var(--quick); }
.bp-tabs button[aria-selected='true'] { background: var(--signal); color: var(--basalt); }
.table { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #0B1620; border: 1px solid var(--signal-dim); }
.table-grid { position: absolute; inset: 0; background-image: linear-gradient(var(--signal-dim) 1px, transparent 1px), linear-gradient(90deg, var(--signal-dim) 1px, transparent 1px), linear-gradient(rgba(143,211,255,0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(143,211,255,0.07) 1px, transparent 1px); background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px; opacity: 0.6; }
.bp-render, .bp-draw { position: absolute; inset: 0; margin: 0; }
.bp-render img, .bp-draw img { width: 100%; height: 100%; object-fit: contain; }
.bp-render { opacity: 0; }
.bp-render img { object-fit: cover; }
.bp-draw img { filter: brightness(0) invert(1) sepia(1) saturate(4) hue-rotate(160deg) brightness(1.05) drop-shadow(0 0 6px rgba(143,211,255,0.55)); }
.bp-scan { position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--signal); box-shadow: 0 0 22px 4px var(--signal); opacity: 0; }
.bp-hint { position: absolute; left: 18px; bottom: 54px; margin: 0; font: 400 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--signal); }
.bp-slider { position: absolute; left: 18px; right: 18px; bottom: 18px; width: calc(100% - 36px); accent-color: var(--signal); }
.exploded { margin: 9vh 0 0; display: grid; grid-template-columns: 8fr 4fr; gap: clamp(20px, 3vw, 56px); align-items: end; }
.exploded img { width: 100%; }
.exploded figcaption { font: 400 clamp(18px, 1.6vw, 26px)/1.35 var(--serif); color: var(--paper-mute); }

/* Machines: floating cut-outs on the night basin */
.machines { padding: 0 0 12vh; }
.machines-stage { position: relative; height: 100vh; min-height: 680px; overflow: hidden; }
.machines-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.55; filter: saturate(0.8); }
.machines-stage::after { content: ''; position: absolute; inset: 0; background: linear-gradient(rgba(18,17,15,0.85), rgba(18,17,15,0.1) 40%, rgba(18,17,15,0.9)); pointer-events: none; }
.machines-stage h2, .machines-stage .lead { position: relative; z-index: 2; padding: 0 var(--gutter); }
.machines-stage h2 { padding-top: calc(var(--bar-h) + 6vh); }
.machines-stage .lead { color: var(--paper-mute); max-width: 40em; margin: 20px 0 0; }
.floaters { position: absolute; inset: 0; z-index: 3; }
.floater { position: absolute; transform: translate(-50%, -50%); filter: drop-shadow(0 24px 30px rgba(0,0,0,0.65)); transition: filter var(--beat); }
.floater img { width: 100%; }
.floater:hover, .floater.is-on { filter: drop-shadow(0 24px 30px rgba(0,0,0,0.65)) drop-shadow(0 0 18px rgba(143,211,255,0.45)); }
.f-strider { left: 16%; top: 70%; width: 15vw; }
.f-printer { left: 36%; top: 62%; width: 19vw; }
.f-shuttle { left: 57%; top: 74%; width: 18vw; }
.f-kestrel { left: 78%; top: 46%; width: 22vw; }
.f-tree { left: 92%; top: 72%; width: 9vw; }
.spec-card { position: absolute; z-index: 4; left: var(--gutter); bottom: 6vh; border-left: 1px solid var(--signal); padding: 6px 0 6px 18px; max-width: 34em; }
.spec-card b { display: block; font: 500 13px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal); margin-bottom: 10px; }
.spec-card span { font: 400 clamp(16px, 1.3vw, 20px)/1.4 var(--serif); }
.nextgen { margin: 10vh var(--gutter) 0; }
.nextgen img { width: 100%; }
.nextgen figcaption { margin-top: 18px; max-width: 60em; color: var(--paper-mute); }

/* Process */
.process { padding: 12vh var(--gutter); display: grid; grid-template-columns: 4fr 8fr; gap: clamp(20px, 3vw, 56px); }
.process-head p { color: var(--paper-mute); margin: 22px 0 32px; }
.council { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.council li { font: 500 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; border: 1px solid var(--rule); border-radius: 999px; padding: 12px 10px; text-align: center; }
.lighttable { background: var(--basalt-2); padding: 18px; }
.sheets { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; }
.sheets button { text-align: left; }
.sheets img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; outline: 1px solid transparent; outline-offset: 3px; transition: outline-color var(--quick); }
.sheets button[aria-pressed='true'] img { outline-color: var(--signal); }
.sheets span { display: block; font: 500 10px/1.3 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--paper-mute); margin-top: 8px; }
.frames { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-top: 18px; }
.frames img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; transition: opacity var(--beat) var(--ease-settle), filter var(--beat) var(--ease-settle); }
.frames img.off { opacity: 0.16; filter: blur(2px) grayscale(1); }

/* Network */
.network { position: relative; padding: 10vh 0; }
.network-fig { overflow: hidden; }
.network-fig img { width: 100%; transform-origin: 45% 70%; }
.network-copy { padding: 40px var(--gutter) 0; display: grid; grid-template-columns: 4fr 8fr; gap: clamp(20px, 3vw, 56px); }
.network-copy p { color: var(--paper-mute); margin: 0; max-width: 36em; }

/* Close */
.close { padding: 8vh var(--gutter) 14vh; text-align: center; }
.close-figs { position: relative; display: grid; grid-template-columns: 1fr 1fr; }
.close-figs img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.close-mark { position: absolute; left: 50%; top: 50%; width: clamp(120px, 14vw, 240px); height: clamp(120px, 14vw, 240px); transform: translate(-50%, -50%); color: var(--paper); filter: drop-shadow(0 2px 18px rgba(0,0,0,0.5)); }
.close-line { font: 400 clamp(28px, 4vw, 64px)/1.15 var(--serif); margin: 56px 0 32px; }
.foot { display: flex; justify-content: space-between; gap: 20px; padding: 22px var(--gutter); border-top: 1px solid var(--rule); font: 400 12px/1.4 var(--mono); color: var(--paper-mute); letter-spacing: var(--track-mono); }

/* Reduced motion: a complete page of stills */
@media (prefers-reduced-motion: reduce) {
  body::after { animation: none; }
  .loader { display: none; }
  .stage { display: none; }
  .stage-still { display: block; }
  .story, .assembly { height: auto; }
  .story-pin { position: static; height: auto; grid-template-columns: 1fr; }
  .story-plate, .year, .rail { display: none; }
  .act { position: static; opacity: 1; transform: none; margin-bottom: 48px; }
  .assembly-pin { position: static; height: auto; display: grid; gap: 16px; padding: 0 var(--gutter); }
  .asm, .assembly-copy { position: static; width: auto; clip-path: none; }
  .hero-hint { display: none; }
  .wordmark { font-size: 17vw; letter-spacing: 0.06em; margin-right: -0.06em; }
  .hero-mark { width: 38vw; height: 38vw; }
  .tagline { font-size: 19px; padding: 0 var(--gutter); }
  * { transition-duration: 0ms !important; }
}

/* Phone and small tablet: one column, native-feeling, nothing hidden that carries the story */
@media (max-width: 900px) {
  :root { --bar-h: 60px; }
  .bar { grid-template-columns: auto 1fr auto; gap: 16px; }
  .spine-nav { display: none; }
  .readout { justify-self: end; }
  .readout span { display: none; }
  .readout b { font-size: 18px; min-width: 0; }
  .menu { grid-template-columns: 1fr; align-content: start; }
  .menu-thumb { display: none; }
  .menu-list a { font-size: clamp(20px, 6.4vw, 30px); padding: 1.4vh 0; }
  .hero-hint { display: none; }
  .scrubber-years li:nth-child(even) { visibility: hidden; }
  .premise, .process, .network-copy { grid-template-columns: 1fr; padding-top: 10vh; }
  .story { height: 520vh; }
  .story-pin { grid-template-columns: 1fr; grid-template-rows: 42vh 1fr auto; padding-top: calc(var(--bar-h) + 12px); }
  .story-copy { margin-top: 16px; }
  .act { justify-content: flex-start; }
  .act img { display: none; }
  .year { top: calc(var(--bar-h) + 16px); font-size: 36px; text-shadow: 0 2px 12px rgba(0,0,0,0.6); z-index: 4; }
  .rail { overflow-x: auto; gap: 18px; justify-content: flex-start; }
  .rail button { white-space: nowrap; font-size: 10px; }
  .assembly { height: 360vh; }
  .asm-a, .asm-b { width: calc(100vw - 2 * var(--gutter)); top: calc(var(--bar-h) + 12px); }
  .asm-c { width: 70vw; bottom: 22vh; }
  .assembly-copy { left: var(--gutter); right: var(--gutter); top: auto; bottom: 4vh; width: auto; }
  .assembly-copy h2 { font-size: 24px; }
  .assembly-copy p { font-size: 15px; margin-top: 10px; }
  .metabolism-head, .bp-head { grid-template-columns: 1fr; }
  .loops, .bp-tabs { grid-column: 1; grid-row: auto; justify-self: start; margin-top: 18px; overflow-x: auto; max-width: 100%; }
  .roots-wrap { overflow-x: auto; margin: 0 calc(-1 * var(--gutter)); padding: 0 var(--gutter); }
  .roots, .nodes { min-width: 900px; }
  .nodes { right: auto; width: 900px; left: var(--gutter); }
  .legend { flex-wrap: wrap; gap: 14px; }
  .node-note { margin: 8px 0 0; text-align: left; flex-basis: 100%; }
  .arch-copy { grid-template-columns: 1fr; }
  .arch-float { position: static; width: 70vw; margin: 8px auto 0; }
  .table { aspect-ratio: 4 / 3; }
  .exploded { grid-template-columns: 1fr; }
  .machines-stage { height: auto; min-height: 0; padding-bottom: 32vh; }
  .floaters { position: relative; height: 70vw; inset: auto; margin-top: 4vh; }
  .f-strider { left: 18%; top: 72%; width: 30vw; } .f-printer { left: 42%; top: 40%; width: 36vw; }
  .f-shuttle { left: 70%; top: 76%; width: 36vw; } .f-kestrel { left: 72%; top: 18%; width: 42vw; } .f-tree { left: 12%; top: 30%; width: 16vw; }
  .spec-card { left: var(--gutter); right: var(--gutter); bottom: 4vh; }
  .sheets { grid-template-columns: repeat(4, 1fr); }
  .frames { grid-template-columns: repeat(3, 1fr); }
  .council { grid-template-columns: repeat(2, 1fr); }
  .close-figs { grid-template-columns: 1fr; }
  .foot { flex-direction: column; gap: 6px; }
}