/* ============================================================
   MASEST / VertKleen — Scrollytelling story v5 (homepage opener)
   GSAP ScrollTrigger engine, native browser scroll (js/story.js).
   Dark, cinematic, art-directed; hands off to the light factual
   sections below. Reduced-motion + no-JS = static stacked layout.
   ============================================================ */

.story {
  --s-bg: #0b0d12;
  --s-bg-2: #10141c;
  --s-ink: #f4f6f8;
  --s-mut: rgba(244, 246, 248, .62);
  --s-danger: #a93420;
  --s-danger-ink: #ff8a6c;
  --s-danger-soft: rgba(169, 52, 32, .14);
  --s-safe: #08796f;
  --s-safe-text: #cffff8;
  --s-safe-soft: rgba(16, 179, 163, .18);
  --s-line: rgba(255, 255, 255, .12);
  /* HMIS axis colors — taught in Act 3, reused on Act 4 lockups + Act 5 zeros */
  --hmis-h: #3b82f6;   /* Health */
  --hmis-f: #ef4444;   /* Flammability */
  --hmis-r: #f5b301;   /* Reactivity */
  --s-ease: cubic-bezier(.16, 1, .3, 1);

  position: relative;
  background: var(--s-bg);
  color: var(--s-ink);
  isolation: isolate;
  left: 50%;
  margin-left: -50vw;
  overflow-x: clip;
  width: 100vw;
}

/* Acts give scroll room; the stage pins (CSS sticky, JS scrubs) */
.story .act { position: relative; height: 212vh; padding: 0; }
.story .act[data-act="1"] { height: 168vh; }   /* photo reel needs less sequencing */
.story .act[data-act="3"] { height: 212vh; }   /* HMIS factor-by-factor */
.story .act[data-act="4"] { height: 260vh; }   /* chemicals one by one */
.story .act-savior { height: 228vh; }
.story .stage {
  position: sticky; top: 0; height: 100vh; height: 100svh; min-height: 620px;
  width: 100vw;
  overflow: hidden; display: grid; place-items: center;
  background: radial-gradient(120% 90% at 50% 0%, var(--s-bg-2) 0%, var(--s-bg) 60%);
}

/* Layers */
.story .bd {
  position: absolute; inset: -4%; width: 108%; height: 108%;
  object-fit: cover; z-index: 0; will-change: transform; pointer-events: none;
}
.story .fx-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; z-index: 2; pointer-events: none; }

/* Cinematic finish: vignette + static film grain on every stage */
.story .stage::before {
  content: ""; position: absolute; inset: 0; z-index: 4; pointer-events: none;
  background:
    radial-gradient(130% 100% at 50% 50%, transparent 55%, rgba(5, 6, 9, .55) 100%),
    linear-gradient(180deg, rgba(5, 6, 9, .35) 0%, transparent 14%, transparent 86%, rgba(5, 6, 9, .4) 100%);
}
.story .stage::after {
  content: ""; position: absolute; inset: 0; z-index: 4; pointer-events: none; opacity: .05;
  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");
}

/* ---------- Chapter rail ---------- */
.story-rail {
  position: sticky; top: 50vh; height: 0; z-index: 30;
  pointer-events: none;
}
.rail-inner {
  position: absolute; left: clamp(14px, 2.4vw, 34px); transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 18px; pointer-events: auto;
}
.rail-btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: none; border: 0; padding: 4px; cursor: pointer;
  color: var(--s-mut); font: inherit; text-align: left;
}
.rail-btn b {
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--body-font);
  font-size: .66rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; font-variant-numeric: tabular-nums;
  border: 1px solid var(--s-line); background: rgba(11, 13, 18, .55);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transition: border-color .4s var(--s-ease), color .4s var(--s-ease), background .4s var(--s-ease);
}
.rail-btn span {
  font-family: var(--body-font);
  font-size: .7rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  opacity: 0; transform: translateX(-6px); transition: opacity .4s var(--s-ease), transform .4s var(--s-ease);
  white-space: nowrap;
}
.rail-btn:hover span, .rail-btn.is-on span { opacity: 1; transform: none; }
.rail-btn.is-on b { border-color: var(--s-danger-ink); color: var(--s-danger-ink); background: rgba(169, 52, 32, .1); }
.rail-btn.is-on.safe b { border-color: var(--s-safe-text); color: var(--s-safe-text); background: rgba(16, 179, 163, .18); }
@media (max-width: 900px) { .story-rail { display: none; } }

/* ---------- Copy blocks ---------- */
.story .act-copy { position: relative; z-index: 5; width: min(680px, 86vw); padding: 0 28px; }
.story .act-copy.bl { justify-self: start; align-self: end; padding-bottom: 12vh; padding-left: clamp(56px, 8vw, 110px); }
.story .act-copy.top { position: absolute; top: clamp(64px, 9vh, 130px); left: 0; right: 0; margin: 0 auto; text-align: center; z-index: 5; }
.story .act-copy.onscrim { padding-top: 18px; padding-bottom: 22px; }
/* Full-bleed, edge-feathered scrim — melts into the page instead of a boxed band. */
.story .act-copy.onscrim::before {
  content: ""; position: absolute; z-index: -1; pointer-events: none;
  left: 50%; transform: translateX(-50%);
  top: -28px; width: 100vw; height: calc(100% + 64px);
  background: radial-gradient(58% 78% at 50% 42%,
    rgba(8, 10, 14, .82) 0%, rgba(8, 10, 14, .44) 44%, transparent 72%);
}

.story .kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--body-font);
  font-size: .74rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--s-mut); margin-bottom: 18px;
}
.story .kicker::before { content: ""; width: 22px; height: 1.5px; background: currentColor; opacity: .7; }
.story .kicker.danger { color: var(--s-danger-ink); }
.story .kicker.safe { color: var(--s-safe-text); }

.story .act-h {
  font-size: clamp(2rem, 4.6vw, 3.5rem); font-weight: 900; line-height: 1.04;
  letter-spacing: -.035em; text-wrap: balance; margin: 0;
  text-shadow: 0 2px 32px rgba(7, 9, 13, .65);
}
.story .act-p {
  margin-top: 20px; font-size: clamp(1.02rem, 1.5vw, 1.2rem); line-height: 1.6;
  color: var(--s-mut); max-width: 54ch; text-wrap: pretty;
  text-shadow: 0 2px 24px rgba(7, 9, 13, .6);
}
.story .act-copy.top .act-p { margin-left: auto; margin-right: auto; }

/* Chemical id tag */
.story .chem-tag {
  display: inline-flex; align-items: center; gap: 12px; margin-top: 28px;
  padding: 11px 18px; border-radius: 999px; border: 1px solid var(--s-line);
  background: rgba(255, 255, 255, .04); font-size: .92rem; font-weight: 600;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.story .chem-tag b { font-variant-numeric: tabular-nums; color: var(--s-danger-ink); font-weight: 800; letter-spacing: .02em; }
.story .chem-tag .pulse {
  width: 9px; height: 9px; border-radius: 50%; background: var(--s-danger);
  box-shadow: 0 0 0 0 rgba(169, 52, 32, .6); animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(169, 52, 32, .55); }
  70% { box-shadow: 0 0 0 12px rgba(169, 52, 32, 0); }
  100% { box-shadow: 0 0 0 0 rgba(169, 52, 32, 0); }
}

/* Reveal driver: JS sets opacity/transform every frame */
.story.story-ready [data-at] { opacity: 0; transform: translateY(28px); will-change: opacity, transform; }

/* ---------- Scroll cue ---------- */
.story .scroll-cue {
  position: absolute; z-index: 6; bottom: calc(26px + env(safe-area-inset-bottom, 0px)); left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  font-size: .7rem; letter-spacing: .2em; text-transform: uppercase; color: var(--s-mut);
}
.story .scroll-cue i { font-size: 1.1rem; animation: bob 1.8s var(--s-ease) infinite; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ============================================================
   ACT 1 — THE ENEMY (curated field-photo reel)
   ============================================================ */
.reel {
  position: absolute; z-index: 3; margin: 0;
  right: clamp(20px, 7vw, 110px); top: clamp(88px, 11vh, 112px); transform: none;
  width: min(430px, 64vw); aspect-ratio: 9 / 10;
}
.reel-slide {
  position: absolute; inset: 0; margin: 0; opacity: 0; will-change: opacity, transform;
  border-radius: 18px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  background: #14171e;
  box-shadow: 0 40px 80px -36px rgba(0, 0, 0, .9), inset 0 1px 0 rgba(255, 255, 255, .07);
}
/* First photo shows immediately on load; the scrub takes over on first scroll. */
.reel-slide[data-slide="0"] { opacity: 1; }
.reel-slide img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}
.reel-slide::after {  /* legibility scrim under the caption */
  content: ""; position: absolute; inset: auto 0 0 0; height: 46%;
  background: linear-gradient(180deg, transparent, rgba(7, 9, 13, .88));
}
.reel-slide figcaption {
  position: absolute; z-index: 1; left: 22px; right: 22px; bottom: 18px;
}
.reel-slide figcaption b {
  display: block; font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 900;
  letter-spacing: -.02em; line-height: 1.1; color: var(--s-ink);
}
.reel-slide figcaption span {
  display: block; margin-top: 6px; font-size: .92rem; line-height: 1.45; color: var(--s-mut);
}
.reel-tag {
  position: absolute; z-index: 20; top: -14px; left: 18px;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--s-line); background: rgba(11, 13, 18, .85);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  font-size: .68rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--s-mut);
}
.reel-tag i { color: var(--s-danger-ink); font-size: .9rem; }
.reel-idx {
  position: absolute; z-index: 20; top: -12px; right: 18px;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--s-line); background: rgba(11, 13, 18, .85);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  font-size: .78rem; font-weight: 700; letter-spacing: .08em; color: var(--s-mut);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   ACT 2 — THE BUILDUP (debris canvas + anchored caption chips)
   ============================================================ */
.pipe-chips { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
/* --burn (0..1) is driven by scroll in story.js: each chip ignites as its debris
   type accumulates in the pipe, so the label conveys the physics, not just a fade. */
.pipe-chips .chip {
  --burn: 0; --c: var(--s-line);
  position: absolute; display: inline-flex; align-items: center; gap: 9px;
  padding: 9px 15px; border-radius: 999px;
  border: 1px solid color-mix(in oklab, var(--s-line), var(--c) calc(var(--burn) * 55%));
  background:
    linear-gradient(0deg, color-mix(in oklab, transparent, var(--c) calc(var(--burn) * 12%)) 0 100%),
    rgba(11, 13, 18, .78);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  font-size: .84rem; font-weight: 700; letter-spacing: .02em; color: var(--s-ink);
  white-space: nowrap;
}
.pipe-chips .chip i {
  position: relative; width: 9px; height: 9px; border-radius: 50%; flex: none;
  background: var(--c);
  box-shadow: 0 0 calc(3px + var(--burn) * 16px) calc(var(--burn) * 1px)
    color-mix(in oklab, var(--c), transparent 35%);
  transform: scale(calc(1 + var(--burn) * 0.4));
}
/* Leader drawing from the chip toward its clog zone on the pipe (down-right). */
.pipe-chips .chip::after {
  content: ""; position: absolute; left: 17px; top: calc(100% - 3px);
  width: 1.5px; height: 24px; border-radius: 2px;
  background: linear-gradient(var(--c), transparent);
  transform-origin: top center; transform: rotate(40deg) scaleY(var(--burn));
  opacity: calc(var(--burn) * .9);
}
/* Active accumulation: a ring pulses out of the dot (reuses the page's pulse motif). */
.pipe-chips .chip.is-burning i::after {
  content: ""; position: absolute; inset: -3px; border-radius: 50%;
  border: 1.5px solid var(--c);
  animation: chipPulse 2.2s var(--s-ease) infinite;
}
@keyframes chipPulse {
  0%   { transform: scale(.55); opacity: .6; }
  70%, 100% { transform: scale(2.4); opacity: 0; }
}
/* Anchored just above each vertical run's mouth, staggered down-right with the
   pipe (PIPE_N in story.js: run mouths at x 0.25/0.44/0.63/0.84). Sit below the
   centered copy so chips never collide with the headline or paragraph. */
.chip.c-scale  { left: clamp(236px, 20vw, 306px); top: 43%; --c: #c9d4d0; }
.chip.c-rust   { left: 35%; top: 53%; --c: #c2553a; }
.chip.c-grease { left: 56%; top: 63%; --c: #c2a04e; }
.chip.c-bio    { left: 74%; top: 78%; --c: #6fa863; }

/* ============================================================
   ACT 3 — THE SCORE (HMIS explained, factor by factor)
   ============================================================ */
.hmis-rig {
  position: relative; z-index: 5; width: min(880px, 90vw); margin: 18vh auto 0;
  display: flex; flex-direction: column; justify-content: center; gap: 30px;
}
.hmis-factors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.factor {
  position: relative; border-radius: 18px; padding: 26px 22px; text-align: center;
  border: 1px solid var(--s-line); background: rgba(255, 255, 255, .03);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.factor .bar { height: 5px; border-radius: 3px; margin-bottom: 18px; }
.f-health .bar { background: var(--hmis-h); }
.f-flam .bar  { background: var(--hmis-f); }
.f-react .bar { background: var(--hmis-r); }
.factor .fico { display: block; font-size: clamp(2rem, 4.4vw, 2.9rem); line-height: 1; color: var(--s-ink); }
.factor .flabel { display: block; margin-top: 12px; font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--s-ink); }
.factor .fmeaning { display: block; margin-top: 8px; font-size: .86rem; line-height: 1.5; color: var(--s-mut); }

.scale-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 12px; font-size: .8rem; color: var(--s-mut); letter-spacing: .04em; }
.scale-track {
  position: relative; height: 14px; border-radius: 999px;
  background: linear-gradient(90deg, #1d2a2f 0%, #6b3a2e 55%, var(--s-danger) 100%);
}
.scale-ticks { display: flex; justify-content: space-between; margin-top: 8px; font-size: .72rem; color: var(--s-mut); font-variant-numeric: tabular-nums; }

/* ============================================================
   ACT 4 — THE CHEMICALS (dots drop onto the shared scale)
   ============================================================ */
.chem-rig {
  position: relative; z-index: 5; width: min(880px, 90vw); margin: 24vh auto 0;
  display: flex; flex-direction: column; justify-content: center; gap: 18px;
}
.chem-scale { position: relative; padding-top: 26px; padding-bottom: 4px; }
.chem-scale .scale-track { overflow: visible; }
/* Dots cluster tightly around their score: small horizontal jitter,
   shallow vertical offsets, labels alternating above/below */
.cdot {
  position: absolute; top: 50%;
  left: clamp(0%, calc((var(--v, 3) + var(--vj, 0)) / 4 * 100%), 100%);
  transform: translate(-50%, -50%) translateY(var(--lift, 0px));
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--s-danger); border: 2.5px solid var(--s-bg);
  box-shadow: 0 0 0 1.5px var(--s-danger), 0 6px 14px rgba(169, 52, 32, .45);
  opacity: 0; will-change: opacity, left;
}
.cdot[data-dot="0"] { --vj: -0.10; --lift: -12px; }
.cdot[data-dot="1"] { --vj: -0.03; --lift: 12px; }
.cdot[data-dot="2"] { --vj: 0.04;  --lift: -12px; }
.cdot[data-dot="3"] { --vj: 0.11;  --lift: 12px; }
.cdot span {
  position: absolute; left: 50%; top: -130%; transform: translateX(-50%);
  font-size: .62rem; font-weight: 800; letter-spacing: .06em; color: var(--s-danger-ink);
}
.cdot[data-dot="1"] span, .cdot[data-dot="3"] span { top: auto; bottom: -130%; }
.chem-scale.safe .cdot { background: var(--s-safe); box-shadow: 0 0 0 1.5px var(--s-safe), 0 6px 14px rgba(8, 121, 111, .36); }
.story .chem-scale .cdot { color: #f4f6f8; }
/* Four distinct label levels so labels stay legible when all four dots
   converge on the same value (at 3, then at 0). Shadow lifts them off
   the track. */
.cdot[data-dot="0"] span { top: -205%; bottom: auto; }
.cdot[data-dot="2"] span { top: -110%; bottom: auto; }
.cdot[data-dot="1"] span { top: auto; bottom: -110%; }
.cdot[data-dot="3"] span { top: auto; bottom: -205%; }
.story .chem-scale .cdot span { text-shadow: 0 1px 3px rgba(8, 10, 14, .75); white-space: nowrap; }
.chem-scale.safe .cdot,
.chem-scale.safe .cdot span { color: #f4f6f8; }
/* One framed HMIS spec panel split into quadrants — not four repeated cards. */
.chem-list {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.chem-card {
  padding: 17px 20px;
  border: 1px solid var(--s-line); border-radius: 14px;
  background: rgba(255, 255, 255, .03);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.chem-card .chead { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.chem-card .chead b { font-size: 1.02rem; font-weight: 800; letter-spacing: -.01em; }
.chem-card .vs {
  font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--s-mut); padding: 4px 10px; border-radius: 999px; border: 1px solid var(--s-line);
}
.chem-card .lockup { margin-left: auto; display: inline-flex; gap: 4px; font-variant-numeric: tabular-nums; }
/* Real HMIS lockup: each digit wears its axis color (Health / Flammability / Reactivity). */
.chem-card .lockup em {
  --ax: var(--s-mut);
  font-style: normal; width: 26px; height: 30px; border-radius: 7px;
  display: grid; place-items: center; font-size: .95rem; font-weight: 900;
  background: color-mix(in oklab, transparent, var(--ax) 16%);
  border: 1px solid color-mix(in oklab, transparent, var(--ax) 48%);
  color: color-mix(in oklab, var(--ax), #fff 50%);
}
.chem-card .lockup em:nth-child(1) { --ax: var(--hmis-h); }
.chem-card .lockup em:nth-child(2) { --ax: var(--hmis-f); }
.chem-card .lockup em:nth-child(3) { --ax: var(--hmis-r); }
.chem-card p { margin: 10px 0 0; font-size: .9rem; line-height: 1.55; color: var(--s-mut); }
.chem-out, .chem-final { margin: 4px auto 0; text-align: center; max-width: 62ch; font-size: 1rem; line-height: 1.6; color: var(--s-mut); }
.chem-out b { color: var(--s-danger-ink); font-weight: 800; }
.chem-final { font-size: clamp(1.15rem, 2vw, 1.45rem); font-weight: 800; color: var(--s-ink); }
.chem-final b { color: var(--s-safe-text); font-weight: 900; }

/* Enemy-first cards: a small cast-color cue before the enemy name (matches
   the Act 2 chips), and the chemical it forces rendered as a tagged tool. */
.chem-card .chead .ecue {
  width: 8px; height: 8px; border-radius: 50%; flex: none;
  display: inline-block; margin-right: 7px; vertical-align: middle;
}
.ecue.c-scale  { background: #c9d4d0; }
.ecue.c-rust   { background: #c2553a; }
.ecue.c-grease { background: #c2a04e; }
.ecue.c-bio    { background: #6fa863; }
.ecue.c-solvent { background: #a78bdb; }
/* Dot label morphs enemy -> chemical; both spans stack, JS crossfades opacity */
.cdot .enemy, .cdot .chem { transition: opacity .25s linear; }
.cdot .chem { opacity: 0; }

/* Act 4 layout: the headline (.act-copy.top, absolutely floated at the stage top)
   and the tall 2x2 .chem-rig were positioned independently — on laptop heights the
   centered rig rose under the headline and clipped its second line. On desktop/laptop,
   lay the whole act out as one vertically-centered flex column so headline and rig
   stack as a single group and can never overlap. Mobile (<=760px) keeps its own
   single-column flow defined above. */
@media (min-width: 761px) {
  .act-chems .stage { display: flex; flex-direction: column; align-items: center; justify-content: center; }
  .act-chems .act-copy.top { position: static; top: auto; margin: 0 0 clamp(10px, 1.8vh, 28px); }
  /* Tighten the rig so headline + full rig clear short laptop heights (~720px)
     without the trailing punchline clipping past the fold. */
  .act-chems .chem-rig { margin: 0; gap: 12px; }
  .act-chems .chem-scale { padding-top: 14px; }
  .act-chems .chem-card { padding-top: 14px; padding-bottom: 14px; }
}

/* ============================================================
   ACT 5 — SAVIOR (VertKleen)
   ============================================================ */
.act-savior .stage { background: linear-gradient(180deg, var(--s-bg) 0%, #0f1a1e 55%, #0c1417 100%); }
.savior-wrap { position: relative; z-index: 5; width: min(900px, 90vw); text-align: center; padding: 0 24px; }
.savior-badge {
  display: inline-flex; align-items: center; gap: 9px; margin-bottom: clamp(12px, 2vh, 22px);
  padding: 8px 16px; border-radius: 999px; border: 1px solid var(--s-safe-soft);
  background: var(--s-safe-soft); color: var(--s-safe-text);
  font-size: .76rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
}
.savior-wrap h2 {
  font-size: clamp(2.2rem, 5vw, 3.7rem); font-weight: 900; letter-spacing: -.045em; line-height: 1.02;
  margin: 0; text-wrap: balance;
}
.savior-wrap h2 .accent { color: var(--s-safe-text); }
.savior-wrap .lede { margin: clamp(12px, 2vh, 22px) auto 0; max-width: 50ch; font-size: clamp(1rem, 1.4vw, 1.18rem); color: var(--s-mut); line-height: 1.5; }
.savior-zero { display: inline-flex; gap: 14px; margin: clamp(16px, 3vh, 34px) 0 6px; font-variant-numeric: tabular-nums; }
.savior-zero .z {
  position: relative; overflow: hidden;
  width: clamp(62px, 10vw, 98px); aspect-ratio: 5 / 6; border-radius: 18px;
  display: grid; place-items: center; font-size: clamp(2.9rem, 6.5vw, 4.7rem); font-weight: 900;
  letter-spacing: -.05em; color: var(--s-safe-text);
  background: linear-gradient(180deg, rgba(8, 121, 111, .18), rgba(8, 121, 111, .06));
  border: 1px solid rgba(8, 121, 111, .42);
  box-shadow: 0 30px 60px -34px rgba(8, 121, 111, .46);
}
/* Each zero caps one HMIS axis — the three colored factors from Act 3, resolved. */
.savior-zero .z::before {
  content: ""; position: absolute; top: 0; left: 22%; right: 22%; height: 3px;
  border-radius: 0 0 3px 3px; background: var(--ax, var(--s-safe-text)); opacity: .8;
}
.savior-zero .z:nth-child(1) { --ax: var(--hmis-h); }
.savior-zero .z:nth-child(2) { --ax: var(--hmis-f); }
.savior-zero .z:nth-child(3) { --ax: var(--hmis-r); }
.savior-cap { font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; color: var(--s-mut); margin-bottom: clamp(12px, 2.2vh, 24px); }
.savior-proof { display: flex; gap: 14px; justify-content: center; }
.savior-proof-before { gap: 10px; margin-bottom: 8px; }
.savior-proof-before figure { opacity: .72; transform: scale(.82); transform-origin: center bottom; }
.savior-proof figure { margin: 0; width: clamp(96px, 12vw, 132px); }
.savior-proof img {
  width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 14px;
  border: 1px solid rgba(8, 121, 111, .38); display: block;
  filter: saturate(.95);
}
.savior-proof figcaption { margin-top: 8px; font-size: .76rem; font-weight: 700; letter-spacing: .04em; color: var(--s-mut); }
.savior-proof-cap { margin: clamp(10px, 1.6vh, 14px) 0 clamp(16px, 2.6vh, 28px); font-size: .8rem; color: var(--s-mut); letter-spacing: .04em; }
.savior-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.savior-ctas .btn-primary { background: var(--s-safe); color: #f4f6f8; box-shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 30px -10px rgba(8, 121, 111, .62); }
.savior-ctas .btn-primary:hover { background: #5fe9d6; }
.savior-ctas .btn-ghost { background: rgba(255, 255, 255, .04); color: #fff; border: 1.5px solid rgba(255, 255, 255, .28); }
.savior-ctas .btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .1); }

/* ============================================================
   SHORT-VIEWPORT FIT — Acts 4 & 5
   The stage is a pinned 100vh box with vertically-centered content.
   On laptop heights the savior stack (~829px) and the chem rig + slider
   exceed the fold, clipping the badge (top) and the proof row / HMIS
   scale (bottom). Tighten the vertical rhythm so both fit < 100vh.
   ============================================================ */
@media (min-width: 761px) and (max-height: 960px) {
  /* Act 4 — chemicals + shared scale */
  .act-chems .act-copy.top { margin-bottom: clamp(6px, 1.2vh, 16px); }
  .act-chems .act-h { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
  .act-chems .chem-rig { gap: 10px; }
  .act-chems .chem-card { padding: 12px 16px; }
  .act-chems .chem-card p { margin-top: 7px; font-size: .86rem; line-height: 1.45; }
  .act-chems .chem-scale { padding-top: 10px; }
  .act-chems .chem-out { font-size: .92rem; line-height: 1.45; }
  .act-chems .chem-final { font-size: clamp(1.05rem, 1.7vw, 1.3rem); }

  /* Act 5 — savior stack */
  .act-savior .savior-badge { margin-bottom: 8px; }
  .act-savior .savior-wrap h2 { font-size: clamp(2rem, 4.2vw, 3rem); }
  .act-savior .savior-wrap .lede { margin-top: 8px; font-size: 1rem; max-width: 54ch; }
  .act-savior .savior-zero { margin: 10px 0 4px; gap: 12px; }
  .act-savior .savior-zero .z { width: clamp(50px, 7.2vw, 74px); border-radius: 14px; font-size: clamp(2.4rem, 5vw, 3.6rem); }
  .act-savior .savior-cap { margin-bottom: 10px; }
  .act-savior .savior-proof { gap: 12px; }
  .act-savior .savior-proof figure { width: clamp(88px, 9.5vw, 112px); }
  .act-savior .savior-proof figcaption { margin-top: 5px; font-size: .7rem; }
}

/* Clear the fixed nav so the "Enter VertKleen" badge never tucks under it,
   then scale the savior stack to fit the height that's left. .savior-wrap is
   NOT GSAP-transformed, so a CSS scale is safe and stays centered via the
   stage's place-items:center. Steps cascade — shortest matching rule wins. */
@media (min-width: 761px) {
  .act-savior .stage { padding-top: 64px; box-sizing: border-box; }
  .act-savior .savior-wrap { transform-origin: center center; }
}
@media (min-width: 761px) and (max-height: 800px) { .act-savior .savior-wrap { transform: scale(.94); } }
@media (min-width: 761px) and (max-height: 730px) { .act-savior .savior-wrap { transform: scale(.88); } }
@media (min-width: 761px) and (max-height: 670px) { .act-savior .savior-wrap { transform: scale(.81); } }
@media (min-width: 761px) and (max-height: 610px) { .act-savior .savior-wrap { transform: scale(.74); } }
@media (min-width: 761px) and (max-height: 560px) { .act-savior .savior-wrap { transform: scale(.68); } }

/* ============================================================
   REDUCED MOTION + NO-JS FALLBACK: stacked, fully visible.
   story.js never adds .story-ready in either case.
   ============================================================ */
.story:not(.story-ready) .act { height: auto; }
.story:not(.story-ready) .stage { position: relative; height: auto; min-height: 0; padding: 80px 0; }
.story:not(.story-ready) [data-at] { opacity: 1; transform: none; }
.story:not(.story-ready) .fx-canvas,
.story:not(.story-ready) .story-rail,
.story:not(.story-ready) .cdot,
.story:not(.story-ready) .scroll-cue { display: none; }
.story:not(.story-ready) .bd { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .5; }
.story:not(.story-ready) .act-copy.top { position: static; margin: 0 auto; }
.story:not(.story-ready) .act-copy.bl { padding-left: 28px; align-self: center; }
.story:not(.story-ready) .reel {
  position: relative; right: auto; top: auto; transform: none;
  width: min(640px, 90vw); aspect-ratio: auto; margin: 30px auto 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
.story:not(.story-ready) .reel-slide { position: relative; opacity: 1; aspect-ratio: 9 / 10; }
.story:not(.story-ready) .reel-tag, .story:not(.story-ready) .reel-idx { display: none; }
.story:not(.story-ready) .pipe-chips {
  position: static; display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 26px;
}
.story:not(.story-ready) .pipe-chips .chip { position: static; }
.story:not(.story-ready) .hmis-rig, .story:not(.story-ready) .chem-rig { margin-top: 30px; }
@media (prefers-reduced-motion: reduce) {
  .story .scroll-cue i, .story .chem-tag .pulse,
  .pipe-chips .chip.is-burning i::after { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .story .act { height: 198vh; }
  .story .act[data-act="1"] { height: 170vh; }
  .story .act[data-act="3"] { height: 212vh; }
  .story .act[data-act="4"] { height: 226vh; }
  .story .act-savior { height: 235vh; }
  .reel { position: relative; right: auto; top: auto; transform: none; width: 78vw; margin: 0 auto 24px; }
  .story .act-copy.bl { align-self: center; text-align: center; padding-bottom: 4vh; padding-left: 28px; }
  .chip.c-scale  { left: 6%; top: 51%; }
  .chip.c-rust   { left: 28%; top: 58%; }
  .chip.c-grease { left: 52%; top: 67%; }
  .pipe-chips .chip { max-width: min(44vw, 172px); white-space: normal; line-height: 1.15; }
  .chip.c-bio    { left: auto; right: 6%; top: 78%; }
  .hmis-factors { gap: 10px; }
  .factor { padding: 18px 10px; border-radius: 14px; }
  .factor .fmeaning { font-size: .78rem; }
  .hmis-rig { margin-top: 24vh; }
  /* Stacked single column: drop the desktop quadrant frame and give each row
     its own bordered card (the quadrant panel only reads as one in 2 columns). */
  .chem-list {
    grid-template-columns: 1fr; gap: 10px;
    border: 0; border-radius: 0; background: none;
    -webkit-backdrop-filter: none; backdrop-filter: none;
  }
  .chem-card {
    padding: 14px 16px;
    border: 1px solid var(--s-line); border-radius: 14px;
    background: rgba(255, 255, 255, .03);
    -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  }
  .chem-card:nth-child(2n) { border-right: 1px solid var(--s-line); }
  .chem-card:nth-child(n+3) { border-bottom: 1px solid var(--s-line); }
  .chem-card p { font-size: .84rem; }
  .chem-rig { margin-top: 14vh; gap: 10px; }
  .chem-scale { order: -1; padding-top: 18px; }
  .chem-list { gap: 8px; }
  .chem-card { padding: 12px 14px; }
  .chem-card .chead { gap: 8px; }
  .chem-card p { font-size: .78rem; line-height: 1.38; }
  .chem-card .vs { font-size: .62rem; }
 .savior-zero { margin: 10px 0 8px; gap: 8px; }
 .savior-zero .z { width: clamp(54px, 18vw, 68px); border-radius: 14px; }
 .savior-proof { gap: 8px; }
 .savior-proof-before { margin-bottom: 2px; }
 .savior-proof figure { width: 22vw; }
 .savior-proof figcaption { margin-top: 4px; font-size: .68rem; }
 .savior-proof-cap { margin: 6px 0 12px; font-size: .72rem; line-height: 1.35; }
}

/* Image polish layer: keeps the real field evidence, but frames it with more
   deliberate industrial contrast and stronger small-screen legibility. */
.story .bd {
  filter: saturate(1.06) contrast(1.08) brightness(.82);
}

.reel-slide {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .04), transparent 28%),
    #101319;
  border-color: rgba(255, 255, 255, .2);
  box-shadow:
    0 42px 92px -40px rgba(0, 0, 0, .92),
    0 0 0 1px rgba(255, 255, 255, .03),
    inset 0 1px 0 rgba(255, 255, 255, .08);
}

.reel-slide img {
  transform: scale(1.012);
  filter: saturate(1.02) contrast(1.08) brightness(.96);
}

.reel-slide figcaption {
  text-shadow: 0 2px 18px rgba(0, 0, 0, .8);
}

.savior-proof figure {
  width: clamp(112px, 13vw, 148px);
}

.savior-proof img {
  filter: saturate(1.04) contrast(1.08) brightness(1.02);
  box-shadow:
    0 18px 42px -28px rgba(8, 121, 111, .48),
    inset 0 1px 0 rgba(255, 255, 255, .1);
}

@media (min-width: 901px) {
  .story .act[data-act="1"] .act-copy.bl {
    padding-bottom: clamp(260px, 32vh, 420px);
    /* Clear the chapter rail + active "THE ENEMY" label so they never overlap the headline. */
    padding-left: clamp(190px, 15vw, 240px);
  }
}

@media (max-width: 760px) {
  .savior-proof {
    gap: 10px;
  }

.savior-proof figure {
  width: min(28vw, 120px);
}
}

/* Keep the story openers procedural: the motion comes from canvas fumes/motes,
   not blurred photo collages behind the content. */
.story .act[data-act="1"] .stage {
  background:
    radial-gradient(45% 38% at 70% 25%, rgba(169, 52, 32, .12), transparent 64%),
    radial-gradient(55% 46% at 28% 64%, rgba(8, 121, 111, .12), transparent 68%),
    radial-gradient(110% 90% at 50% 0%, #151924 0%, #090c12 64%);
}

.story .act-savior .stage {
  background:
    radial-gradient(45% 44% at 50% 38%, rgba(8, 121, 111, .22), transparent 68%),
    radial-gradient(70% 58% at 78% 12%, rgba(8, 121, 111, .14), transparent 70%),
    radial-gradient(110% 90% at 50% 0%, #101821 0%, #070a10 64%);
}

.story .kicker {
  font-size: .82rem;
  letter-spacing: .045em !important;
  text-transform: none !important;
}

.story .chem-tag,
.story .scale-head,
.story .scale-ticks {
  text-transform: none !important;
}

.story .savior-cap {
  letter-spacing: .045em !important;
  text-transform: none !important;
}

@media (max-width: 760px) {
  .story .act[data-act="1"] .stage {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: clamp(28px, 5vh, 46px);
    padding-top: 68px;
  }

  .story .act[data-act="1"] .act-copy.bl {
    order: 1;
    align-self: stretch;
    text-align: left;
    padding-bottom: 0;
  }

  .story .act[data-act="1"] .reel {
    order: 2;
    width: min(78vw, 328px);
    margin-bottom: 0;
  }

  .act-chems .stage {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 72px;
  }

  .act-chems .act-copy.top {
    position: relative;
    top: auto;
    width: min(360px, 90vw);
    margin: 0 auto 18px;
    padding: 0 20px;
  }

  .act-chems .act-h {
    font-size: clamp(2rem, 11vw, 2.9rem);
  }

  .act-chems .chem-rig {
    width: min(350px, 90vw);
    margin-top: 0;
    gap: 12px;
  }

  .act-chems .chem-scale {
    order: 0;
    padding-top: 4px;
  }

  .act-chems .scale-ticks {
    font-size: .6rem;
  }

  .act-chems .cdot {
    width: 18px;
    height: 18px;
  }

  .act-chems .cdot span {
    font-size: .64rem;
  }

  .act-savior .savior-proof {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: min(310px, 82vw);
    margin: 10px auto 0;
    gap: 10px;
  }

  .act-savior .proof-pair:nth-child(3) {
    display: none;
  }

  .act-savior .savior-proof figure {
    width: 100%;
  }

  .act-savior .savior-proof figcaption {
    display: flex;
    justify-content: center;
    gap: .35em;
  }
}

.story .savior-proof figcaption {
  display: flex;
  justify-content: center;
  gap: .35em;
}

.story .cdot[data-dot="0"] span { transform: translateX(-92%); }
.story .cdot[data-dot="1"] span { transform: translateX(-8%); }
.story .cdot[data-dot="2"] span { transform: translateX(8%); top: -300%; }
.story .cdot[data-dot="3"] span { transform: translateX(-92%); bottom: -300%; }

.story .cdot span {
  display: none;
}

@media (max-width: 760px) {
  .act-chems .cdot span {
    display: none;
  }
}

@media (max-width: 760px) {
  .act-savior .stage {
    padding-top: calc(78px + env(safe-area-inset-top, 0px));
    align-items: start;
  }

  .act-savior .savior-wrap {
    align-self: stretch;
  }

  .act-savior .savior-ctas {
    margin-bottom: 72px;
  }

  .act-chems .stage {
    justify-content: flex-start;
    padding-top: calc(92px + env(safe-area-inset-top, 0px));
    gap: 8px;
  }

  .act-chems .act-copy.top {
    margin-bottom: 8px;
  }

  .act-chems .act-h {
    font-size: clamp(1.65rem, 9vw, 2.28rem);
    line-height: .98;
  }

  .act-chems .chem-rig {
    gap: 8px;
  }

  .act-chems .chem-list {
    gap: 8px;
  }

  .act-chems .chem-card {
    padding: 12px 14px;
  }

  .act-chems .chem-card p {
    margin-top: 8px;
    font-size: .8rem;
    line-height: 1.45;
  }
}
}