/* Hallmark · custom viral propagation · P4 H4 E4 S5 R4 V5.
   Scroll controls the spread; typography and controls stay intact. */
:root{--color-transmission-glow:oklch(66% .235 26 / .24);--color-transmission-faint:oklch(66% .235 26 / .045);--color-transmission-edge:oklch(66% .235 26 / .55)}
.spread-hero{height:235svh;position:relative;border-bottom:1px solid var(--color-rule);background:var(--color-paper)}
.spread-pin{height:calc(100svh - 76px);min-height:680px;position:sticky;top:76px;overflow:clip;isolation:isolate}
.spread-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
.spread-noise{position:absolute;inset:0;pointer-events:none;z-index:1;opacity:.24;background-image:repeating-linear-gradient(0deg,var(--color-clear) 0 5px,var(--color-transmission-faint) 5px 6px);mask-image:linear-gradient(to right,var(--color-clear),var(--color-paper) 40%)}
.spread-copy{position:relative;margin-left:max(40px,calc((100vw - 1380px)/2));width:32%;max-width:450px;height:100%;display:flex;flex-direction:column;justify-content:center;z-index:3;padding-block:34px 90px}
.spread-copy h1{font:600 clamp(43px,4.3vw,68px)/1.06 var(--font-pixel);letter-spacing:-1.5px;margin:28px 0 24px;text-wrap:balance;text-shadow:0 0 24px var(--color-shadow)}
.spread-copy h1 span{color:var(--color-accent);text-shadow:0 0 28px var(--color-transmission-glow)}
.spread-copy>p{font:15px/1.9 var(--font-body);color:var(--color-muted);margin:0 0 28px;max-width:395px}
.spread-copy .origin-actions{gap:18px}.spread-copy .origin-actions .text-link{font-size:12px}.spread-copy .px-btn{font-size:12px}
.specimen-evolution{display:flex;align-items:center;gap:6px;border:1px dashed var(--color-transmission-edge);background:var(--color-transmission-faint);padding:12px;margin-top:34px;max-width:390px;height:85px}
.specimen-evolution img{mix-blend-mode:screen;object-fit:contain;flex-shrink:0}.specimen-evolution i{font:12px var(--font-mono);font-style:normal;color:var(--color-accent)}.specimen-evolution>span{font:7px var(--font-mono);color:var(--color-muted);writing-mode:vertical-rl;letter-spacing:1px}
.spread-platform{position:absolute;z-index:2;display:grid;place-items:center;gap:6px;width:72px;min-height:72px;border:1px solid var(--color-accent);background:var(--color-paper);color:var(--color-accent-bright);padding:12px;clip-path:polygon(10px 0,calc(100% - 10px) 0,100% 10px,100% calc(100% - 10px),calc(100% - 10px) 100%,10px 100%,0 calc(100% - 10px),0 10px);transform:translateY(calc(var(--spread-progress,0)*-35px));transition:opacity 350ms var(--ease-out)}
.spread-platform svg{width:28px;height:28px}.spread-platform span{font:7px var(--font-mono);letter-spacing:.4px}.platform-x{left:75%;top:17%}.platform-community{left:39%;top:14%}.platform-content{left:36%;top:52%}.platform-world{left:72%;top:83%}
.spread-monitor{position:absolute;z-index:3;right:40px;top:35px;width:225px;padding:18px;border:1px dashed var(--color-transmission-edge);background:var(--color-paper);font-family:var(--font-mono)}
.spread-monitor>span{color:var(--color-accent);font:600 13px var(--font-pixel)}.spread-monitor>b{display:block;color:var(--color-ink);font:500 12px/1.7 var(--font-body);margin-top:12px;min-height:40px}.spread-monitor>small{font:6px var(--font-mono);color:var(--color-dim)}.spread-phase-list{display:grid;gap:8px;border-top:1px solid var(--color-rule);padding-top:15px;margin-top:15px;font:9px var(--font-mono);color:var(--color-dim)}
[data-spread-stage="0"] .spread-phase-list>span:nth-child(1),[data-spread-stage="1"] .spread-phase-list>span:nth-child(2),[data-spread-stage="2"] .spread-phase-list>span:nth-child(3),[data-spread-stage="3"] .spread-phase-list>span:nth-child(4){color:var(--color-accent-bright)}
.spread-bottom{position:absolute;z-index:4;inset:auto 40px 20px;display:flex;justify-content:space-between;align-items:center;gap:20px;font:8px var(--font-mono);color:var(--color-muted);letter-spacing:1px}.spread-bottom button{font:10px var(--font-body);color:var(--color-muted);background:var(--color-paper);border:1px solid var(--color-rule);padding:8px 12px}.spread-bottom button:hover{border-color:var(--color-accent);color:var(--color-ink)}.spread-meter{position:absolute;left:0;right:0;bottom:-20px;height:2px;background:var(--color-rule)}.spread-meter i{display:block;width:100%;height:100%;background:var(--color-accent);transform:scaleX(var(--spread-progress,0));transform-origin:left}
.virus-atmosphere{position:fixed;inset:0;width:100vw;height:100dvh;pointer-events:none!important;z-index:12}
.infection-target{transition:border-color 650ms var(--ease-out),box-shadow 650ms var(--ease-out),background-color 650ms var(--ease-out)}
.infection-target.is-infected{border-color:var(--color-transmission-edge);box-shadow:inset 3px 0 var(--color-accent),8px 0 24px -20px var(--color-accent);background-color:var(--color-transmission-faint)}
.agent-index-row.is-infected>i{color:var(--color-accent)}.agent-index-row.is-infected .strain-icon{filter:drop-shadow(0 0 5px var(--color-transmission-glow))}.release-section .is-infected{box-shadow:inset 3px 0 var(--color-accent)}
.agents-title.is-infected,.release-copy.is-infected,.closing-section.is-infected,.lab-title.is-infected{padding-left:20px}
.virus-top .brand b{font-family:var(--font-pixel);letter-spacing:0}.lab-title:after{content:'TRANSMISSION ACTIVE';color:var(--color-accent-bright);font:8px var(--font-mono);letter-spacing:1px}
@media(max-width:1100px){.spread-copy{margin-left:24px;width:35%;padding-bottom:80px}.spread-copy h1{font-size:52px}.spread-copy>p{font-size:14px}.spread-monitor{right:24px;width:185px;padding:14px}.platform-x{top:29%;left:81%}.spread-bottom{inset-inline:24px}.specimen-evolution{gap:2px;padding:8px}.specimen-evolution img{max-width:52px}.platform-community{left:43%}}
@media(max-width:768px){.spread-hero{height:215svh}.spread-pin{top:70px;height:calc(100svh - 70px);min-height:760px}.spread-copy{width:44%;justify-content:flex-start;padding-top:60px}.spread-copy h1{font-size:44px}.spread-copy>p{font-size:13px;line-height:1.8}.spread-copy .origin-actions{gap:14px}.spread-monitor{width:175px;top:24px}.spread-platform{width:58px;min-height:58px;padding:10px}.spread-platform svg{width:23px;height:23px}.spread-platform span{font-size:6px}.platform-community{left:50%;top:28%}.platform-content{left:48%;top:68%}.platform-world{left:80%;top:82%}.specimen-evolution{margin-top:24px;gap:3px}.specimen-evolution img{max-width:42px}.specimen-evolution>span{font-size:6px}}
@media(max-width:600px){.spread-pin{min-height:810px}.spread-copy{margin-left:20px;width:calc(100% - 40px);height:auto;padding:32px 0 0;max-width:none}.spread-copy .eyebrow{font-size:8px}.spread-copy h1{font-size:43px;line-height:1.05;letter-spacing:0;margin:20px 0 18px;max-width:340px}.spread-copy h1 br{display:none}.spread-copy>p{max-width:440px;font-size:14px;line-height:1.7;margin-bottom:20px}.spread-copy .origin-actions{gap:15px}.spread-copy .px-btn{font-size:11px;padding-inline:14px;min-height:40px}.spread-copy .text-link{font-size:10px!important}.specimen-evolution{display:none}.spread-monitor{left:20px;right:20px;top:auto;bottom:68px;width:auto;padding:10px 12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--color-paper)}.spread-monitor>span{font-size:12px}.spread-monitor>b{font-size:10px;min-height:0;margin:0}.spread-monitor>small{width:100%;font-size:6px}.spread-phase-list{display:none}.spread-platform{width:48px;min-height:48px;padding:8px}.spread-platform svg{width:22px;height:22px}.spread-platform span{display:none}.platform-community{left:8%;top:52%}.platform-x{left:80%;top:51%}.platform-content{left:10%;top:77%}.platform-world{left:80%;top:78%}.spread-bottom{inset-inline:20px;bottom:19px;font-size:6px;letter-spacing:.5px;gap:8px}.spread-bottom button{font-size:9px;padding:7px 9px}.spread-copy .origin-actions{flex-wrap:wrap}.lab-title:after{display:none}}
@media(max-width:350px){.spread-copy{margin-left:16px;width:calc(100% - 32px)}.spread-copy h1{font-size:37px}.spread-copy>p{font-size:13px}.spread-copy .origin-actions{gap:12px}.spread-copy .text-link{font-size:9px!important}.spread-monitor{left:16px;right:16px}.spread-monitor>b{font-size:9px}}
@media(prefers-reduced-motion:reduce){.spread-hero{height:auto}.spread-pin{position:relative;top:0}.spread-platform{transform:none}.spread-bottom>span{letter-spacing:0}.virus-atmosphere{display:none}.infection-target{transition:none}}

.spread-canvas,.virus-atmosphere{mix-blend-mode:screen}

.spread-pin{background:var(--color-paper)}
/* Give the hero evolution strip an opaque blending surface and fill its width. */
.specimen-evolution{isolation:isolate;background:var(--color-panel);justify-content:space-between;width:100%;gap:6px}
.specimen-evolution img{mix-blend-mode:screen}