/* ═══════════════════════════════════════════════════════════════════════════
   blue-hour · Leo Malinen
   Theme is six colours and two faces. Everything structural lives in
   scrollcraft.css and is never restyled here.
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --sc-canvas:     #070A0F;
  --sc-surface:    #0E141C;
  --sc-ink:        #E8EDF4;
  --sc-ink-soft:   #8A97A8;
  --sc-accent:     #FFB35C;
  --sc-accent-ink: #1A1006;

  --sc-font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --sc-font-text:    "Geist", ui-sans-serif, system-ui, sans-serif;
  --sc-font-mono:    "Geist Mono", ui-monospace, "SFMono-Regular", monospace;

  /* Page-owned, written by sweep.js */
  --lit: 0;        /* sweep progress, 0 to 1 */
  --scan-o: 0;     /* scan line visibility */
  --city-o: 1;     /* how present the photograph is */
  --plate-y: 0px;
  --haze-y: 0px;
  --near-y: 0px;

  /* The third ink step, tinted from the ground rather than flat grey, and a
     token so the same value cannot drift between the footer, the record and
     the marquee's back row. Measured at 5.2:1 on the darkest ground. */
  --ink-faint: #8795A6;

  --edge: rgba(232,237,244,0.10);
  --edge-2: rgba(232,237,244,0.18);
}

body { background: var(--sc-canvas); }

.skip {
  position: fixed; top: 0; left: 0; z-index: 90;
  transform: translateY(-120%);
  background: var(--sc-accent); color: var(--sc-accent-ink);
  padding: .7rem 1.1rem; font: 500 .85rem/1 var(--sc-font-text);
  border-radius: 0 0 4px 0;
}
.skip:focus-visible { transform: translateY(0); }

/* ── THE CITY ─────────────────────────────────────────────────────────────
   One fixed place. Planes translate at different rates; nothing re-renders. */
.city {
  position: fixed; inset: 0; z-index: 0;
  overflow: hidden;
  opacity: var(--city-o);
  will-change: opacity;
  pointer-events: none;
}
.city__plate { position: absolute; inset: 0; }
.city__plate {
  transform: translate3d(0, var(--plate-y), 0) scale(1.06);
  transform-origin: 50% 50%;
}
.city__img, .city__lights {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; object-position: 50% 50%;
  max-width: none;
}
/* The sweep. A soft leading edge walks left to right and the lights it has
   passed stay on for the rest of the page. */
.city__lights {
  mix-blend-mode: screen;
  opacity: 1;
  -webkit-mask-image: linear-gradient(93deg,
      #000 0%,
      #000 calc(var(--lit) * 120% - 11%),
      rgba(0,0,0,.45) calc(var(--lit) * 120% - 3%),
      rgba(0,0,0,0) calc(var(--lit) * 120% + 6%),
      rgba(0,0,0,0) 100%);
  mask-image: linear-gradient(93deg,
      #000 0%,
      #000 calc(var(--lit) * 120% - 11%),
      rgba(0,0,0,.45) calc(var(--lit) * 120% - 3%),
      rgba(0,0,0,0) calc(var(--lit) * 120% + 6%),
      rgba(0,0,0,0) 100%);
}
.city__haze {
  position: absolute; left: 0; width: 100%; max-width: none;
  top: 46%; height: auto;
  transform: translate3d(0, var(--haze-y), 0);
  opacity: .8;
}
.city__near {
  position: absolute; left: 0; bottom: -3%;
  width: 100%; height: auto; max-width: none;
  transform: translate3d(0, var(--near-y), 0);
}
.city__scan {
  position: absolute; top: -5%; bottom: -5%;
  left: calc(var(--lit) * 120% - 4%);
  width: 2px;
  background: linear-gradient(to bottom,
      transparent, rgba(255,179,92,.7) 22%, rgba(255,214,166,.95) 50%, rgba(255,179,92,.7) 78%, transparent);
  box-shadow: 0 0 34px 6px rgba(255,179,92,.20);
  opacity: var(--scan-o);
}
/* Density where the hero copy sits, and a floor so the planes never show a
   clip line. Not a full-frame overlay: it is a corner and a floor. */
.city__veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(115% 110% at 6% 84%, rgba(5,7,11,.93) 0%, rgba(5,7,11,.66) 30%, rgba(5,7,11,.22) 54%, rgba(5,7,11,0) 72%),
    linear-gradient(to top, var(--sc-canvas) 0%, rgba(7,10,15,.55) 9%, rgba(7,10,15,0) 24%);
}

/* ── BAR ──────────────────────────────────────────────────────────────────
   Does not invert: the ground is dark the whole way down. Carries a descent
   readout instead, because a dossier's chrome is about how much you've seen. */
.bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; align-items: center; gap: var(--sc-5);
  padding: .95rem var(--sc-gutter);
  background: linear-gradient(to bottom, rgba(5,7,11,.86), rgba(5,7,11,.42) 62%, rgba(5,7,11,0));
  backdrop-filter: blur(9px); -webkit-backdrop-filter: blur(9px);
}
.mark { display: flex; align-items: center; gap: .62rem; margin-right: auto; }
.mark__glyph {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
  width: 19px; height: 19px; flex: none;
}
.mark__glyph i { background: #2C3A4E; }
.mark__glyph i:nth-child(1), .mark__glyph i:nth-child(4) { background: var(--sc-accent); }
.mark__name {
  font: 600 .93rem/1 var(--sc-font-display);
  letter-spacing: -.012em; color: var(--sc-ink);
}
.bar__nav { display: flex; gap: var(--sc-5); }
.bar__nav a {
  font: 400 .87rem/1 var(--sc-font-text);
  color: var(--sc-ink-soft);
  padding: .3rem 0;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--sc-ease-out), border-color .16s var(--sc-ease-out);
}
.bar__nav a:hover, .bar__nav a.is-here { color: var(--sc-ink); border-bottom-color: var(--sc-accent); }
.bar__meter {
  position: absolute; left: 0; bottom: 0; height: 1px;
  width: 100%;
  transform: scaleX(var(--descent, 0)); transform-origin: 0 50%;
  background: linear-gradient(to right, rgba(255,179,92,.35), var(--sc-accent));
}

/* ── BUTTONS AND LINKS ────────────────────────────────────────────────────
   The engine themes the underline but does not remove it, which is right for
   running prose and wrong for chrome. Anything that draws its own rule or is
   a button opts out; body links keep the underline. */
.mark, .bar__nav a, .btn, .lnk, .foot a, .close__addr a { text-decoration: none; }
.btn {
  display: inline-block;
  background: var(--sc-accent); color: var(--sc-accent-ink);
  font: 600 .92rem/1 var(--sc-font-text); letter-spacing: -.005em;
  padding: .86rem 1.35rem; border-radius: 4px;
  transition: transform .13s var(--sc-ease-out), background-color .16s var(--sc-ease-out);
}
.btn:hover { background: #FFC483; }
.btn:active { transform: translateY(1px); }
.btn--bar { padding: .62rem 1rem; font-size: .84rem; }
.btn--big { padding: 1.05rem 1.9rem; font-size: 1.02rem; }
.lnk {
  font: 400 .92rem/1.4 var(--sc-font-text); color: var(--sc-ink);
  border-bottom: 1px solid var(--edge-2);
  padding-bottom: 2px;
  transition: border-color .16s var(--sc-ease-out), color .16s var(--sc-ease-out);
}
.lnk:hover { border-bottom-color: var(--sc-accent); color: var(--sc-accent); }

.stamp {
  /* fit-content, so the element's box is its ink. A full-width box makes a
     contrast measurement grade photograph the text never sits on. */
  width: fit-content;
  font: 500 .70rem/1.3 var(--sc-font-mono);
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--sc-accent);
  display: flex; align-items: center; gap: .7rem;
}
.stamp::before {
  content: ""; width: 1.6rem; height: 1px; flex: none;
  background: var(--sc-accent); opacity: .7;
}

/* ── ACTS, shared ─────────────────────────────────────────────────────────*/
main { position: relative; z-index: 2; pointer-events: none; }
main > * { pointer-events: auto; }
/* The hero is mostly empty frame. Let the pointer reach the lights behind it,
   while the copy block itself stays a normal target. Everywhere else content
   wins, which is why a light never sits on top of a paragraph. */
.act--hero { pointer-events: none; }
.hero, .hero a { pointer-events: auto; }
.act { position: relative; }
.act [data-sc-stage] { display: grid; align-content: center; }

/* ── ACT 1 · HERO ─────────────────────────────────────────────────────────*/
.act--hero { min-height: 100svh; display: grid; align-items: end; }
.hero {
  position: relative; z-index: 1;
  padding: 0 var(--sc-gutter) clamp(3.5rem, 11vh, 8rem);
  max-width: 62rem;
}
.stamp--hero { margin-bottom: var(--sc-5); }
.hero__h {
  font-family: var(--sc-font-display);
  font-weight: 500;
  font-size: clamp(3.6rem, 11.5vw, 10.5rem);
  line-height: .88;
  letter-spacing: -.045em;
  color: var(--sc-ink);
  margin: 0 0 var(--sc-5);
  text-wrap: balance;
}
.hero__lede {
  font: 300 clamp(1.05rem, 1.9vw, 1.42rem)/1.5 var(--sc-font-text);
  color: var(--sc-ink); max-width: 34ch;
  margin: 0 0 var(--sc-5); text-wrap: pretty;
}
.hero__do { display: flex; align-items: center; gap: var(--sc-5); flex-wrap: wrap; margin: 0; }

/* ── MARQUEE ──────────────────────────────────────────────────────────────
   Runs on its own clock. Act 5's rail runs on the visitor's hand. The
   contrast between the two is the point of having both. */
.strip {
  position: relative; z-index: 1;
  padding: clamp(2.2rem,5vh,3.6rem) 0;
  background: linear-gradient(to bottom, rgba(7,10,15,0), rgba(7,10,15,.92) 22%, rgba(7,10,15,.92) 78%, rgba(7,10,15,0));
  border-block: 1px solid var(--edge);
  display: grid; gap: .9rem;
}
.strip__row { overflow: hidden; -webkit-mask-image: linear-gradient(to right, transparent, #000 9%, #000 91%, transparent); mask-image: linear-gradient(to right, transparent, #000 9%, #000 91%, transparent); }
.strip__track {
  display: flex; align-items: center; gap: 2.6rem;
  width: max-content;
  animation: strip-run 44s linear infinite;
}
.strip__row--back .strip__track { animation-duration: 58s; animation-direction: reverse; }
.strip__track span {
  font: 400 clamp(.88rem,1.45vw,1.12rem)/1 var(--sc-font-mono);
  letter-spacing: .07em; text-transform: uppercase;
  color: var(--sc-ink-soft); white-space: nowrap;
  display: flex; align-items: center; gap: 2.6rem;
}
.strip__track span::after {
  content: ""; width: 4px; height: 4px; border-radius: 50%;
  background: var(--sc-accent); opacity: .55; flex: none;
}
.strip__row--back .strip__track span { color: var(--ink-faint); }
@keyframes strip-run { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ── ACT 2 · THREE ────────────────────────────────────────────────────────*/
.three { min-height: 100svh; padding: var(--sc-section) var(--sc-gutter); gap: var(--sc-5); }
.three .stamp { margin-bottom: var(--sc-5); }
.three__set { display: grid; gap: clamp(1.6rem, 3.6vw, 3rem); grid-template-columns: repeat(3, 1fr); max-width: var(--sc-maxw); }
.three__i h2 { margin: 0 0 .7rem; color: var(--sc-ink); }
.three__i p { color: var(--sc-ink-soft); max-width: 34ch; margin: 0; }
.three__i { border-top: 1px solid var(--edge); padding-top: var(--sc-5); }

/* ── ACT 3 · NOISE ────────────────────────────────────────────────────────
   The one surface on the page that is not the photograph. */
.act--noise { position: relative; }
.noise {
  position: relative; min-height: 100svh;
  display: grid; place-items: center;
  padding: var(--sc-section) var(--sc-gutter);
  background: radial-gradient(90% 70% at 50% 50%, rgba(5,7,11,.72), var(--sc-canvas) 78%);
}
.noise__field {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  -webkit-mask-image: radial-gradient(86% 72% at 50% 50%, transparent 12%, #000 46%);
  mask-image: radial-gradient(86% 72% at 50% 50%, transparent 12%, #000 46%);
}
/* The clearing the lens opens. Full-bleed, so the iris is a transition and
   not a fidget. */
.noise__clear {
  position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(closest-side circle at 50% 50%,
      var(--sc-canvas) 0%, var(--sc-canvas) 52%, rgba(7,10,15,.86) 72%, rgba(7,10,15,0) 100%);
}
.noise__cut { position: relative; z-index: 2; line-height: 1; padding: 1.2rem 0; }
/* Driven from the act's own progress rather than a cue, which keeps the type
   out of the clip path entirely. opacity clamps on its own. */
.noise__line { opacity: calc((var(--sc-p, 1) - 0.30) * 4); }
@media (prefers-reduced-motion: reduce) { .noise__line { opacity: 1; } }
.noise__line {
  color: var(--sc-ink); text-align: center; margin: 0;
  font-size: clamp(1.5rem, 4.2vw, 3.1rem); line-height: 1.22;
  letter-spacing: -.022em; font-weight: 300;
}
.noise__line em { color: var(--sc-accent); font-style: italic; }
/* Authored silence: the run-up to the peak. Documented in BRIEF.md so the
   verification pass does not read it as dead scroll. */
.noise__hold { height: 42vh; }

/* ── ACT 4 · PEAK ─────────────────────────────────────────────────────────*/
.peak {
  min-height: 100svh; padding: var(--sc-section) var(--sc-gutter);
  gap: var(--sc-5);
  grid-template-columns: minmax(0,1fr);
  align-content: center;
  max-width: 78rem; margin-inline: auto;
}
.peak__head h2 { margin: .8rem 0 .5rem; color: var(--sc-ink); }
.peak__tech { font: 400 .84rem/1.5 var(--sc-font-mono); color: var(--sc-ink-soft); letter-spacing: .04em; margin: 0; }
.peak__body { display: grid; gap: 1.1rem; max-width: var(--sc-measure); }
.peak__body p { color: var(--sc-ink); margin: 0; }
.peak__nums { margin-top: var(--sc-5); }
.peak__nums .stamp { margin-bottom: 1.1rem; }
.nums { display: grid; gap: clamp(1.1rem, 3vw, 2.6rem); grid-template-columns: repeat(3, 1fr); margin: 0; }
.nums div { border-top: 1px solid var(--edge); padding-top: .9rem; }
.nums dt { font: 400 .82rem/1.45 var(--sc-font-text); color: var(--sc-ink-soft); margin-bottom: .35rem; max-width: 22ch; }
.peak__lit {
  font: 300 clamp(1.2rem, 2.6vw, 2.1rem)/1.3 var(--sc-font-display);
  letter-spacing: -.022em; color: var(--sc-ink);
  max-width: 24ch; margin: 0; text-wrap: balance;
}
.nums dd {
  margin: 0; font-family: var(--sc-font-display); font-weight: 500;
  font-size: clamp(1.9rem, 4vw, 3.1rem); line-height: 1; letter-spacing: -.035em;
  color: var(--sc-accent); font-variant-numeric: tabular-nums;
}

/* ── ACT 5 · RAIL ─────────────────────────────────────────────────────────*/
.rail {
  display: flex; align-items: stretch; gap: clamp(1.1rem, 2.4vw, 2rem);
  padding: 0 var(--sc-gutter);
  width: max-content;
}
.rail__lead, .rail__end {
  width: clamp(17rem, 25vw, 23rem); flex: none;
  align-self: center; display: grid; gap: .9rem; align-content: center;
}
.rail__lead h2 { margin: 0; color: var(--sc-ink); }
.rail__lead p, .rail__end p { color: var(--sc-ink-soft); margin: 0; }
.rail__end { gap: .7rem; }
.card {
  width: clamp(16rem, 23vw, 21rem); flex: none;
  display: grid; align-content: start; gap: .62rem;
  background: rgba(14,20,28,.72);
  border: 1px solid var(--edge);
  border-radius: 6px; padding: .8rem .8rem 1.25rem;
  backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
}
.card__shot { border-radius: 4px; overflow: hidden; aspect-ratio: 4/5; }
.card__shot svg { width: 100%; height: 100%; display: block; }

/* ── PROJECT DIAGRAMS ─────────────────────────────────────────────────────
   One monoline drawing per project, of what that project actually does. They
   share a stroke weight and a palette so the four read as one set, and they
   carry information rather than decorating the card. */
.dia { --s: 1.4px; }
.dia__bg { fill: #0B1119; }
.dia [fill="none"], .dia g > path, .dia g > circle, .dia g > rect { fill: none; }
.dia__dim  path,
.dia__dim2 rect { stroke: var(--sc-ink-soft); stroke-width: var(--s); opacity: .22; }
.dia__dim2 rect { stroke-width: 1.1px; }
.dia__sig  { fill: none; stroke: var(--sc-ink-soft); stroke-width: 1.7px; opacity: .55;
             stroke-linejoin: round; stroke-linecap: round; }
.dia__thr  path { stroke: var(--sc-accent); stroke-width: 1.1px; stroke-dasharray: 5 5; opacity: .6; }
.dia__on   circle, .dia__on path, .dia__on2 rect { stroke: var(--sc-accent); stroke-width: var(--s); }
.dia__on   path { opacity: .55; }
.dia__on2  rect { fill: rgba(255,179,92,.16); }
.dia__dot  { fill: var(--sc-accent); stroke: none; }
.dia__bar  { fill: none; stroke: var(--sc-ink-soft); stroke-width: 1.1px; opacity: .28; }
.dia__seg  rect { fill: rgba(255,179,92,.20); stroke: var(--sc-accent); stroke-width: 1.1px; }
.dia__scan path { stroke: var(--sc-accent); stroke-width: 1.2px; opacity: .45; }
.dia__brk  path { stroke: var(--sc-ink-soft); stroke-width: 1.1px; opacity: .34; }
.dia__node circle, .dia__node rect { stroke: var(--sc-ink-soft); stroke-width: var(--s); opacity: .55; }
.dia__feed path { stroke: var(--sc-ink-soft); stroke-width: 1.5px; opacity: .40; }
.dia__doc  { fill: none; stroke: var(--sc-ink-soft); stroke-width: var(--s); opacity: .40; }
.card h3 {
  font: 500 clamp(1.1rem,1.7vw,1.35rem)/1.15 var(--sc-font-display);
  letter-spacing: -.022em; color: var(--sc-ink); margin: .5rem 0 0;
}
.card__tech { font: 400 .74rem/1.4 var(--sc-font-mono); color: var(--sc-accent); letter-spacing: .04em; margin: 0; }
.card .sc-body { font-size: .89rem; color: var(--sc-ink-soft); margin: 0; }

/* ── ACT 6 · CLOSE ────────────────────────────────────────────────────────*/
.close {
  min-height: 100svh; padding: calc(var(--sc-section) * .8) var(--sc-gutter) 0;
  grid-template-rows: 1fr auto;
}
.close__in {
  display: grid; gap: clamp(2rem, 6vw, 5rem);
  grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
  align-items: center; align-content: center;
  max-width: var(--sc-maxw); margin-inline: auto; width: 100%;
}
.rec { margin: 1.1rem 0 0; display: grid; gap: .95rem; }
.rec div { border-top: 1px solid var(--edge); padding-top: .62rem; }
.rec dt { font: 500 .96rem/1.3 var(--sc-font-display); color: var(--sc-ink); letter-spacing: -.012em; }
.rec dd { margin: 0; font: 400 .86rem/1.45 var(--sc-font-text); color: var(--sc-ink-soft); }
.rec__t { font-family: var(--sc-font-mono); font-size: .74rem; letter-spacing: .05em; color: var(--ink-faint); margin-top: .12rem; }
.close__ask h2 { margin: 0 0 var(--sc-5); color: var(--sc-ink); }
.close__addr { margin: 1rem 0 0; }
.close__addr a {
  font: 400 1rem/1.4 var(--sc-font-mono); color: var(--sc-ink-soft);
  letter-spacing: .02em; border-bottom: 1px solid var(--edge-2); padding-bottom: 2px;
}
.close__addr a:hover { color: var(--sc-accent); border-bottom-color: var(--sc-accent); }
.foot {
  display: flex; justify-content: space-between; gap: var(--sc-5); flex-wrap: wrap;
  border-top: 1px solid var(--edge);
  padding: 1.15rem 0; margin-top: var(--sc-5);
  max-width: var(--sc-maxw); margin-inline: auto; width: 100%;
}
.foot p { font: 400 .78rem/1.5 var(--sc-font-text); color: var(--ink-faint); margin: 0; }
.foot a { color: var(--sc-ink-soft); margin-left: 1.1rem; }
.foot a:first-child { margin-left: 0; }
.foot a:hover { color: var(--sc-accent); }

/* ── PHONE ────────────────────────────────────────────────────────────────
   Art-directed, not shrunk: the hero steps down a rung, the grids unstack,
   the rail gets narrower cards, and the named lights grow to a real tap
   target while dropping to the four that fit the portrait crop. */
@media (max-width: 860px) {
  .three__set { grid-template-columns: 1fr; }
  .nums { grid-template-columns: 1fr; gap: 1.1rem; }
  .close__in { grid-template-columns: 1fr; gap: 2.2rem; }
}
@media (max-width: 720px) {
  .bar { gap: .8rem; padding: .8rem var(--sc-gutter); }
  .bar__nav { display: none; }
  .hero__h { font-size: clamp(3rem, 15vw, 4.6rem); }
  .hero__lede { font-size: 1.02rem; max-width: 30ch; }
  .hero__do { gap: 1rem; }
  .card { width: 76vw; }
  .rail__lead, .rail__end { width: 76vw; }
  .noise__hold { height: 26vh; }
  .strip__track { gap: 1.7rem; }
  .strip__track span { gap: 1.7rem; }
}

/* ── REDUCED MOTION ───────────────────────────────────────────────────────
   Fewer and gentler, not zero. The sweep resolves to a fully lit city so the
   page still means what it meant; the planes stop travelling. */
@media (prefers-reduced-motion: reduce) {
  .city__plate, .city__haze, .city__near { transform: none; }
  .city__lights { -webkit-mask-image: none; mask-image: none; }
  .city__scan { display: none; }
  .strip__track { animation: none; transform: none; }
  .strip__row { overflow-x: auto; }
}