.film { position: relative; }
.film-canvas { display: none; }
html.film-on .film {
  height: calc(100vh + 8925px);
  height: calc(100lvh + 8925px);
}
html.film-on .film-viewport {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100lvh;
  overflow: hidden;
  background: var(--stage-bg, var(--ink));
}
html.film-on .film-canvas {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
html.film-on .cap-col {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  z-index: 2;
  pointer-events: none;
  transform: translateY(-50%);
}
html.film-on .cap {
  width: min(46%, 620px);
  opacity: 0;
  transform: translateY(var(--cap-y, 0px));
}
html.film-on .cap a,
html.film-on .cap button { pointer-events: auto; }
html.film-on .cap-top + .cap-bottom { margin-top: clamp(26px, 3.6vh, 46px); }
.scroll-hint { display: none; }
html.film-on .scroll-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: clamp(48px, 9vh, 104px);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  opacity: 0;
  pointer-events: none;
  color: var(--route);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  transition: opacity .45s ease, transform .45s ease;
  transform: translateY(6px);
}
html.film-on .scroll-hint.is-on {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  html.film-on .scroll-hint { transition: opacity .2s linear; transform: none; }
  html.film-on .scroll-hint.is-on { transform: none; }
}
html.film-on .scroll-hint svg {
  width: 12px;
  height: 22px;
  animation: scroll-hint-nudge 1.9s ease-in-out infinite;
}
@keyframes scroll-hint-nudge {
  0%, 100% { transform: translateY(0); opacity: .5; }
  50% { transform: translateY(5px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html.film-on .scroll-hint svg { animation: none; opacity: .8; }
}
.film-viewport .section-title,
.film-viewport h1 { color: var(--stage-fg, var(--ink)); }
.film-viewport .section-sub,
.film-viewport .cap-lead,
.film-viewport .cap-aside,
.film-viewport .hero-sub,
.film-viewport .hero-note { color: var(--stage-fg-dim, var(--ink-70)); }
.film-viewport .cap-lead b:not(.mark) { color: var(--stage-fg, var(--ink)); }
.film-viewport.is-dark .accent,
.film-viewport.is-dark .mark { color: var(--route); }
.film-viewport.is-dark .section-title { color: var(--route); }
.film-viewport.is-dark .cap-lead b:not(.mark) { color: var(--route); }
.film-viewport.is-dark .btn { background: var(--route); color: var(--ink); }
.film-viewport.is-dark .btn:hover,
.film-viewport.is-dark .btn:focus-visible { background: var(--paper); color: var(--ink); }
.film-viewport.is-route .section-title,
.film-viewport.is-route .mark,
.film-viewport.is-route .stack-list b { color: var(--paper); }
.film-viewport.is-route .section-title .accent,
.film-viewport.is-route .accent,
.film-viewport.is-route .stack-list span,
.film-viewport.is-route .stack-list li::before { color: var(--ink); }
.film-viewport.is-route .btn { background: var(--ink); color: var(--paper); }
.film-viewport.is-route .btn:hover,
.film-viewport.is-route .btn:focus-visible { background: var(--paper); color: var(--ink); }
.cap-hero h1 {
  font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.02;
  font-size: clamp(30px, 3.4vw, 54px);
  margin: 0 0 22px;
  text-wrap: balance;
}
.cap-hero .hero-sub { font-size: clamp(15px, 1.2vw, 18px); margin: 0 0 26px; }
.cap-hero .hero-ctas { display: flex; gap: 18px; flex-wrap: wrap; }
.cap-hero .hero-note {
  margin: 16px 0 0;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px; line-height: 1.5;
}
.film-viewport .section-title {
  margin: 0;
  letter-spacing: -.025em;
  line-height: 1.02;
  text-wrap: balance;
}
.cap-lead {
  margin: 0 0 15px;
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.55;
  text-wrap: pretty;
}
.cap-lead:last-child { margin-bottom: 0; }
.cap-bottom .btn { margin-top: 6px; }
@media (min-width: 901px) {
  html.film-on .cap-lead.hold-line {
    width: max(100%, 35em);
    max-width: min(calc(58vw - 40px), 620px);
  }
}
.cap [data-in] { transform: translateY(var(--cap-y, 0px)); }
.cap-thesis {
  margin: 0;
  font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-weight: 900;
  font-size: clamp(26px, 2.6vw, 40px);
  line-height: 1.08;
  letter-spacing: -.03em;
  color: var(--stage-fg, var(--ink));
  text-wrap: balance;
}
html.film-on .cap-mid { width: min(58%, 760px); }
.cap-aside {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.55;
  text-wrap: pretty;
}
.film-steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; }
.film-step {
  display: grid; grid-template-columns: 2.4em 1fr; gap: 12px; align-items: baseline;
  border-top: 1px solid var(--stage-rule, var(--grid)); padding: 13px 0 12px;
}
.film-step:last-child { border-bottom: 1px solid var(--stage-rule, var(--grid)); }
.film-step-num {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px; font-weight: 700; letter-spacing: .06em;
  color: var(--stage-fg-dim, var(--ink-55));
  transition: color var(--t-panel) var(--ease-out);
}
.film-step-title, .film-step-sub { grid-column: 2; }
.film-step-title {
  margin: 0; font-size: clamp(16px, 1.35vw, 21px); font-weight: 800;
  line-height: 1.25; letter-spacing: -.01em;
  color: var(--stage-fg-dim, var(--ink-70));
  transition: color var(--t-panel) var(--ease-out);
}
.film-step-sub {
  margin: 4px 0 0; font-size: clamp(14px, 1.05vw, 16px); line-height: 1.45;
  color: var(--stage-fg-dim, var(--ink-70));
  min-height: 2.9em;
  opacity: var(--on, 0);
}
.film-step.is-on .film-step-num { color: var(--route); }
.film-step.is-on .film-step-title { color: var(--stage-fg, var(--ink)); }
.stack-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; counter-reset: stack; }
.stack-list li {
  counter-increment: stack;
  display: grid; grid-template-columns: 2.4em 1fr; gap: 5px 12px;
  border-top: 1px solid var(--stage-rule, var(--grid));
  padding: 12px 0;
  font-size: clamp(14px, 1.05vw, 16px); line-height: 1.45;
  color: var(--stage-fg-dim, var(--ink-70));
}
.stack-list li:last-child { border-bottom: 1px solid var(--stage-rule, var(--grid)); }
.stack-list li::before {
  content: counter(stack, decimal-leading-zero);
  grid-row: 1 / span 2;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px; font-weight: 700; letter-spacing: .06em;
  color: var(--route);
  padding-top: .2em;
}
.stack-list b { font-size: clamp(16px, 1.3vw, 20px); color: var(--stage-fg, var(--ink)); }
.stack-list span { grid-column: 2; }
.cap-points { margin: 20px 0 0; padding: 0; list-style: none; }
.cap-points li {
  border-top: 1px solid var(--stage-rule, var(--grid));
  padding: 9px 0 8px;
  font-size: 14px; line-height: 1.45;
  color: var(--stage-fg-dim, var(--ink-70));
  text-wrap: pretty;
}
.cap-points li:last-child { border-bottom: 1px solid var(--stage-rule, var(--grid)); }
.kit-row { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; }
.kit-row li {
  border-top: 1px solid var(--stage-rule, var(--grid));
  padding: 13px 0 12px;
  font-size: clamp(14px, 1.05vw, 16px); line-height: 1.45;
  color: var(--stage-fg-dim, var(--ink-70));
  display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; align-items: baseline;
}
.kit-row li:last-child { border-bottom: 1px solid var(--stage-rule, var(--grid)); }
.kit-row b { font-size: clamp(16px, 1.3vw, 20px); color: var(--stage-fg, var(--ink)); }
.br-narrow { display: none; }
.br-wide { display: inline; }
@media (max-width: 900px) {
  .br-narrow { display: inline; }
  .br-wide { display: none; }
  html.film-on .cap-lead.hold-line {
    font-size: clamp(13px, 3.75vw, 15px);
    letter-spacing: -.01em;
  }
  .cap-hero .hero-sub { font-size: clamp(13px, 3.85vw, 15px); }
  html.film-on .film-canvas { inset: 0; height: 100%; }
  html.film-on .cap-col {
    top: 44px;
    bottom: 44%;
    padding: 0 24px 14px;
    transform: none;
    display: flex;
    flex-direction: column;
    justify-content: safe center;
  }
  html.film-on .cap { width: 100%; }
  html.film-on .cap-top + .cap-bottom { margin-top: clamp(12px, 2vh, 26px); }
  html.film-on .cap-col:has(.cap-hero) { bottom: 30%; }
  .cap-hero h1 { font-size: clamp(28px, 7.5vw, 42px); }
  .film-step {
    padding: clamp(5px, 0.98vh, 8px) 0 clamp(4px, 0.86vh, 7px);
    gap: 4px 10px; grid-template-columns: 2em 1fr;
  }
  .film-step-title { font-size: clamp(12.5px, 1.79vh, 14.5px); line-height: 1.25; }
  .film-step-sub {
    margin-top: 2px; font-size: clamp(10px, 1.42vh, 11.5px);
    line-height: 1.3; min-height: 2.6em;
  }
  .stack-list li,
  .kit-row li {
    padding: clamp(5px, 0.98vh, 8px) 0 clamp(4px, 0.86vh, 7px);
    font-size: clamp(12px, 1.6vh, 13px); line-height: 1.35;
  }
  .stack-list li { gap: 2px 10px; grid-template-columns: 2em 1fr; }
  .kit-row li { grid-template-columns: 1fr; gap: 2px; }
  .stack-list b,
  .kit-row b { font-size: clamp(12.5px, 1.79vh, 14.5px); line-height: 1.25; }
  .stack-list span,
  .kit-row li span { font-size: clamp(10px, 1.42vh, 11.5px); line-height: 1.3; }
  .stack-list ~ .cap-aside,
  .film-steps ~ .cap-aside { display: none; }
  html.film-on .cap-col:has(.kit-row) { bottom: 36%; }
  html.film-on .cap-col:has(.stack-list) { bottom: 45%; }
}
@media (max-width: 560px) {
  html.film-on .cap-col { padding: 0 18px 14px; }
}
html.film-static .film { height: auto; }
html.film-static .film-viewport {
  position: static;
  height: auto;
  overflow: visible;
  padding: 0 0 64px;
}
html.film-static .film-canvas {
  position: relative;
  inset: auto;
  aspect-ratio: 4 / 3;
  height: auto;
  margin-bottom: 40px;
}
html.film-static .cap-col {
  position: static;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  transform: none;
  pointer-events: auto;
}
html.film-static .cap {
  width: auto;
  opacity: 1;
  transform: none;
  margin-bottom: 34px;
}
html.film-static .cap-top + .cap-bottom { margin-top: 0; }
html.film-static .scroll-hint { display: none; }
html.film-static .film-step-sub { opacity: 1; }