:root {
  --paper: #f2f2ef;
  --ink: #090909;
  --quiet: #6c6c68;
  --line: rgba(9, 9, 9, 0.2);
  --signal: #2457ff;
  --finale: 0;
  --copy: 0;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body {
  margin: 0;
  overflow-x: hidden;
}

.scroll-film {
  height: 500vh;
}

.stage {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  background: var(--paper);
}

.masthead {
  position: absolute;
  z-index: 4;
  inset: 24px 28px auto;
  display: flex;
  justify-content: space-between;
  font: 700 11px/1 "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: calc(1 - var(--copy));
}

.film-frame {
  position: absolute;
  z-index: 1;
  inset: 0;
  overflow: hidden;
  background: #000;
  transform-origin: 50% 50%;
  transform:
    translate3d(calc(var(--finale) * -20vw), 0, 0)
    scale(calc(1 - var(--finale) * 0.16));
  clip-path: inset(
    calc(var(--finale) * 5vh)
    calc(var(--finale) * 8vw)
    calc(var(--finale) * 5vh)
    calc(var(--finale) * 2vw)
  );
  border-radius: calc(var(--finale) * 4px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, calc(var(--finale) * 0.14));
  will-change: transform, clip-path;
}

video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-copy {
  position: absolute;
  z-index: 3;
  top: 50%;
  right: clamp(22px, 4vw, 72px);
  width: min(46vw, 760px);
  transform: translate3d(calc((1 - var(--copy)) * 12vw), -50%, 0);
  opacity: var(--copy);
  pointer-events: none;
}

.eyebrow,
.hint {
  margin: 0;
  font: 700 clamp(10px, 0.78vw, 13px)/1.2 "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  margin-bottom: clamp(18px, 2.4vh, 30px);
  color: var(--signal);
}

h1 {
  margin: 0;
  font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  font-size: clamp(68px, 9.4vw, 176px);
  font-weight: 900;
  line-height: 0.77;
  letter-spacing: -0.055em;
  text-transform: uppercase;
}

h1 span {
  display: block;
  transform: translate3d(calc((1 - var(--copy)) * 8vw), 0, 0);
}

h1 span:nth-child(2) {
  margin-left: 0.36em;
  transition-delay: 40ms;
}

h1 span:nth-child(3) {
  margin-left: -0.04em;
}

.hint {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: clamp(24px, 4vh, 52px);
  color: var(--quiet);
}

.hint::before {
  width: 42px;
  height: 2px;
  background: var(--signal);
  content: "";
}

.scroll-cue {
  position: absolute;
  z-index: 4;
  left: 28px;
  bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font: 700 10px/1 "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: calc(1 - min(1, var(--finale) * 5));
}

.scroll-cue i {
  display: block;
  width: 42px;
  height: 1px;
  background: currentColor;
  animation: breathe 1.8s ease-in-out infinite;
  transform-origin: left;
}

.progress {
  position: absolute;
  z-index: 5;
  right: 28px;
  bottom: 24px;
  display: grid;
  grid-template-columns: 24px 96px 24px;
  gap: 9px;
  align-items: center;
  color: color-mix(in srgb, var(--ink) calc(var(--copy) * 100%), white);
  font: 700 9px/1 "SFMono-Regular", Consolas, monospace;
}

.progress div {
  height: 1px;
  overflow: hidden;
  background: currentColor;
  opacity: 0.4;
}

.progress i {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--signal);
  transform: scaleX(var(--progress, 0));
  transform-origin: left;
}

.after {
  min-height: 100vh;
  padding: 12vh 5vw;
  background: var(--ink);
  color: var(--paper);
}

.after p {
  margin: 0 0 30vh;
  font: 700 11px/1 monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.after h2 {
  max-width: 9ch;
  margin: 0;
  font-size: clamp(64px, 10vw, 160px);
  line-height: 0.9;
  letter-spacing: -0.055em;
}

@keyframes breathe {
  0%, 100% { transform: scaleX(0.35); }
  50% { transform: scaleX(1); }
}

@media (max-width: 820px) {
  .scroll-film { height: 420vh; }
  .masthead { inset: 18px 18px auto; }
  .masthead span:last-child { display: none; }
  .film-frame {
    transform: translate3d(0, calc(var(--finale) * -17vh), 0) scale(calc(1 - var(--finale) * 0.22));
    clip-path: inset(calc(var(--finale) * 4vh) calc(var(--finale) * 4vw));
  }
  .hero-copy {
    top: auto;
    right: 18px;
    bottom: calc(28px + env(safe-area-inset-bottom));
    left: 18px;
    width: auto;
    transform: translate3d(0, calc((1 - var(--copy)) * 10vh), 0);
  }
  h1 { font-size: clamp(58px, 18vw, 112px); line-height: 0.79; }
  .eyebrow { margin-bottom: 14px; }
  .hint { margin-top: 20px; }
  .scroll-cue { left: 18px; bottom: 18px; }
  .progress { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-cue i { animation: none; }
  .film-frame,
  .hero-copy,
  h1 span { will-change: auto; }
}