/* «La scienza — come funziona»: narrazione guidata dallo scorrimento sull'impianto di timeline.com/science.
   Ogni .story è alta N×100vh; la scena interna è sticky e riceve --p (0→1) e data-step da cf.js. */

/* apertura: frase centrata con immagini incastonate */
.cf-open{min-height:calc(100svh - 78px);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:40px 20px 80px}
.cf-open .t-label{margin-bottom:28px}
.cf-open h1{font-weight:400;font-size:clamp(34px,4.6vw,64px);line-height:1.12;letter-spacing:-.03em;max-width:17ch;margin:0}
.cf-pill{display:inline-block;width:1.9em;height:.92em;border-radius:999px;overflow:hidden;vertical-align:-.08em;margin:0 .12em;background:var(--panel)}
.cf-pill img{width:100%;height:100%;object-fit:cover}
.cf-open p{font-family:var(--serif);font-size:clamp(17px,1.4vw,20px);line-height:1.45;color:var(--ink-2);max-width:46ch;margin:28px 0 0}
.cf-cue{margin-top:44px;display:flex;flex-direction:column;align-items:center;gap:10px;font-size:11px;font-weight:500;letter-spacing:.28em;text-transform:uppercase;color:var(--ink-2)}
.cf-cue i{width:1px;height:46px;background:linear-gradient(var(--ink-2),transparent)}

/* struttura comune delle storie */
.story{position:relative}
.story__stage{position:sticky;top:0;height:100svh;overflow:hidden}
.story__cap{position:absolute;left:0;right:0;text-align:center;padding:0 20px;font-size:clamp(22px,2.4vw,34px);font-weight:400;letter-spacing:-.02em;line-height:1.2;color:#fff;opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);pointer-events:none}
.story__cap.on{opacity:1;transform:none}
.story__cap small{display:block;font-size:12px;font-weight:500;letter-spacing:.24em;text-transform:uppercase;opacity:.75;margin-top:14px}

/* storia 1: dalla pelle alla vena (zoom sulla foto reale) */
.s1{height:340svh}
.s1 .story__stage{margin:0 var(--edge);border-radius:var(--r);background:#2a1f1a}
.s1__img{position:absolute;inset:0;transform-origin:63% 57%;will-change:transform,filter}
.s1__img img{width:100%;height:100%;object-fit:cover;object-position:63% 57%}
.s1__shade{position:absolute;inset:0;background:rgba(22,18,15,.32);transition:background .4s}
.s1__dots{position:absolute;inset:0;opacity:0;background-image:radial-gradient(rgba(255,255,255,.75) 1.2px,transparent 1.6px);background-size:46px 46px;transition:opacity .6s}
.s1 .story__cap{top:44%}

/* storia 2: dentro la vena */
.s2{height:420svh}
.s2 .story__stage{background:var(--bg);display:grid;grid-template-columns:4fr 8fr;align-items:center;gap:20px;padding:0 var(--pad)}
.s2__txt{position:relative;min-height:330px}
.s2__step{position:absolute;inset:0;opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.s2__step.on{opacity:1;transform:none}
.s2__step h2{font-size:clamp(28px,2.8vw,40px);font-weight:400;letter-spacing:-.025em;line-height:1.1;margin:10px 0 16px}
.s2__step p{font-family:var(--serif);font-size:clamp(17px,1.3vw,19px);line-height:1.45;margin:0;max-width:36ch}
.s2__step .src{display:block;margin-top:14px;font-size:12px;color:var(--ink-2)}
.s2__prog{display:flex;gap:6px;margin-top:22px}
.s2__prog i{width:28px;height:2px;background:var(--line)}
.s2__prog i.on{background:var(--ink)}
.s2__fig{position:relative;border-radius:var(--r);background:var(--panel);aspect-ratio:2/1.08;overflow:hidden}
.s2__fig svg{width:100%;height:100%;display:block}
.s2__wl{position:absolute;right:18px;top:16px;display:inline-flex;padding:3px;border-radius:6px;background:rgba(255,255,255,.7);z-index:2}
.s2__wl button{border:0;background:transparent;padding:6px 12px;border-radius:4px;font-size:11px;font-weight:500;letter-spacing:.9px;cursor:pointer;color:var(--ink-2)}
.s2__wl button[aria-pressed="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.06)}
.cf-svg text{font-family:var(--sans);font-size:13px;fill:var(--ink)}
.cf-svg .muted{fill:rgba(0,0,0,.56)}
.cf-svg .wall{stroke:#CFC9BF;stroke-width:1.5;fill:none}
.cf-svg .wall2{stroke:#E2DCD2;stroke-width:6;fill:none}
.cf-svg .plasma{fill:#F6EFE8}
.cf-svg .rbc{fill:#B8323F}
.cf-svg .rbc-in{fill:#9C2232}
.cf-svg .wbc{fill:#EFEAF0;stroke:#C9BFCB;stroke-width:1.2}
.cf-svg .wbc-n{fill:#C9B8CF}
.cf-svg .plt{fill:#E3C59A}
.cf-svg .hot-ring{fill:none;stroke:var(--wl);stroke-width:2.4;opacity:0;transition:opacity .4s}
.cf-svg .hot .hot-ring{opacity:1}
.cf-svg .fib{stroke:#9A9A95;stroke-width:5;stroke-linecap:round;fill:none}
.cf-svg .fib-core{stroke:var(--wl);stroke-width:1.6;fill:none;opacity:.9}
.cf-svg .cone{fill:url(#cfCone);opacity:0;transition:opacity .6s}
.cf-svg .tip{fill:#fff;stroke:var(--wl);stroke-width:2}
.cf-svg .lab{opacity:0;transition:opacity .45s}
.cf-svg .lab.on{opacity:1}
.cf-svg .dim{stroke:var(--ink);stroke-width:1;fill:none}
@media (max-width:980px){
  .s2 .story__stage{grid-template-columns:1fr;grid-template-rows:auto auto;align-content:center;gap:16px;padding:70px 16px 16px}
  .s2__txt{min-height:220px;order:2}
  .s2__step h2{font-size:24px}.s2__step p{font-size:16px}
}

/* storia 3: la cascata in una cellula */
.s3{height:460svh}
.s3 .story__stage{background:var(--bg);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:60px 20px 20px}
.s3__row{display:grid;grid-template-columns:auto auto;gap:56px;align-items:center}
.s3__cell{width:min(400px,40vw);aspect-ratio:1}
.s3__cell svg{width:100%;height:100%;overflow:visible}
.s3__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;max-width:340px}
.s3__list li{display:grid;grid-template-columns:22px 1fr;gap:12px;align-items:start;font-size:14.5px;line-height:1.35;color:rgba(0,0,0,.32);transition:color .45s}
.s3__list li i{width:18px;height:18px;border-radius:50%;border:1px solid currentColor;display:grid;place-items:center;font-style:normal;font-size:10px;margin-top:1px}
.s3__list li b{display:block;font-weight:500}
.s3__list li span{display:block;font-size:12.5px;margin-top:2px}
.s3__list li.on{color:var(--ink)}
.s3__list li.on span{color:var(--ink-2)}
.s3__list li.on i{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.s3__list .lvl{display:inline-block;margin-top:5px;font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:2px 6px;border-radius:3px;background:var(--panel);color:var(--ink)}
.s3__cap{margin-top:34px;text-align:center;font-size:clamp(22px,2.2vw,30px);font-weight:400;letter-spacing:-.02em;line-height:1.2;max-width:24ch}
.s3__cap small{display:block;font-family:var(--serif);font-size:16px;letter-spacing:0;color:var(--ink-2);margin-top:12px;max-width:52ch}
.cf-cell .mem{fill:#F3F0F4;stroke:#D8D0DB;stroke-width:1.5}
.cf-cell .nuc{fill:#E4DAE8}
.cf-cell .mito{fill:#EAF0F2;stroke:#B9C7CC;stroke-width:1.4}
.cf-cell .cris{fill:none;stroke:#B9C7CC;stroke-width:1.2}
.cf-cell .ph{stroke:var(--wl);stroke-width:2.2;fill:none;stroke-dasharray:6 6}
.cf-cell .no{fill:#6E8FA0}
.cf-cell .atp{fill:#D9A441}
.cf-cell .ros{fill:none;stroke:#C8102E;stroke-width:1.4}
.cf-cell .shield{fill:none;stroke:#2C7A4B;stroke-width:1.6}
.cf-cell .out{stroke:var(--ink);stroke-width:1.3;fill:none;stroke-dasharray:3 5}
.cf-cell [data-k]{opacity:0;transition:opacity .5s var(--ease)}
.cf-cell [data-k].on{opacity:1}
@media (max-width:980px){.s3__row{grid-template-columns:1fr;gap:18px;justify-items:center}.s3__cell{width:min(260px,62vw)}.s3__list{gap:8px}.s3__list li{font-size:13.5px}.s3__cap{margin-top:16px;font-size:20px}.s3__cap small{display:none}}

/* scena 4: la dose */
.cf-dose{display:grid;grid-template-columns:5fr 7fr;gap:48px;padding:56px 48px}
.cf-dose h2{font-size:clamp(30px,3.2vw,46px);font-weight:400;letter-spacing:-.025em;line-height:1.1;margin:10px 0 16px}
.cf-dose .t-serif{max-width:40ch}
.cf-ctl{display:grid;gap:18px;margin-top:28px}
.cf-ctl label{display:grid;grid-template-columns:1fr auto;gap:8px;font-size:12px;font-weight:500;letter-spacing:1.08px;text-transform:uppercase}
.cf-ctl output{font-variant-numeric:tabular-nums;font-size:14px;letter-spacing:0;text-transform:none}
.cf-ctl input[type=range]{grid-column:1/-1;width:100%;accent-color:var(--ink)}
.cf-seg{display:inline-flex;padding:3px;border-radius:6px;background:rgba(0,0,0,.06)}
.cf-seg button{border:0;background:transparent;padding:6px 12px;border-radius:4px;font-size:11px;font-weight:500;letter-spacing:.9px;text-transform:uppercase;cursor:pointer;color:rgba(0,0,0,.6)}
.cf-seg button[aria-pressed="true"]{background:#fff;color:var(--ink)}
.cf-out{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-radius:8px;overflow:hidden;margin-top:24px}
.cf-out div{background:#fff;padding:14px 16px}
.cf-out b{display:block;font-size:26px;font-weight:400;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.cf-out span{font-size:12px;color:var(--ink-2)}
.cf-vol{background:#fff;border-radius:8px;padding:20px}
.cf-vol__dots{display:grid;grid-template-columns:repeat(25,1fr);gap:5px;margin:16px 0 14px}
.cf-vol__dots i{aspect-ratio:1;border-radius:50%;background:#E6E1D8;transition:background .35s}
.cf-vol__dots i.on{background:var(--wl)}
.cf-vol p{margin:0;font-size:13px;color:var(--ink-2);line-height:1.5}
.cf-vol h3{font-size:17px;font-weight:500;margin:0}
.cf-curve{margin-top:14px;background:#fff;border-radius:8px;padding:16px 18px}
.cf-curve svg{width:100%;height:auto}
.cf-curve text{font-family:var(--sans);font-size:11px;fill:rgba(0,0,0,.6)}
.cf-curve figcaption{font-size:12px;color:var(--ink-2);margin-top:8px;line-height:1.45}
@media (max-width:980px){.cf-dose{grid-template-columns:1fr;padding:32px 20px}.cf-vol__dots{gap:3px}}

/* bento «che cosa è stato misurato» (impianto della griglia clinica di timeline.com/science) */
.cf-bento{display:grid;grid-template-columns:4fr 8fr;gap:48px}
.cf-bento__h h2{font-size:clamp(30px,3.2vw,46px);font-weight:400;letter-spacing:-.025em;line-height:1.1;margin:12px 0 22px}
.cf-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.cf-tile{background:var(--panel);border-radius:8px;padding:22px;display:flex;flex-direction:column;min-height:230px;position:relative;overflow:hidden}
.cf-tile--wide{grid-column:1/-1}
.cf-tile--img{color:#fff;background:#2a1f1a}
.cf-tile--img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.62}
.cf-tile--img > *:not(img){position:relative}
.cf-tile h3{font-size:17px;font-weight:500;margin:0}
.cf-tile .big{font-size:clamp(40px,4vw,58px);font-weight:400;letter-spacing:-.03em;line-height:1;margin-top:auto}
.cf-tile .big small{font-size:.4em;margin-left:4px}
.cf-tile p{font-family:var(--serif);font-size:16px;line-height:1.4;margin:10px 0 0;max-width:44ch}
.cf-tile .bar{height:3px;background:var(--line);margin-top:16px;position:relative}
.cf-tile .bar i{position:absolute;left:0;top:0;bottom:0;background:var(--wl);width:var(--w,50%)}
.cf-tile .meta{display:flex;justify-content:space-between;gap:12px;margin-top:14px;font-size:11px;font-weight:500;letter-spacing:1px;text-transform:uppercase;color:var(--ink-2)}
.cf-tile--img .meta,.cf-tile--img p{color:rgba(255,255,255,.86)}
.cf-tile .meta a{border-bottom:.5px solid currentColor}
.cf-tile .tag{position:absolute;top:18px;right:18px;font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:3px 7px;border-radius:3px;background:#fff;color:var(--ink)}
.cf-note{font-size:12px;color:var(--ink-2);margin-top:14px;line-height:1.5}
@media (max-width:980px){.cf-bento{grid-template-columns:1fr;gap:20px}.cf-grid{grid-template-columns:1fr}}

/* banner finale scuro */
.cf-banner{position:relative;overflow:hidden;color:#fff;background:#1C1F2B;border-radius:var(--r);margin:0 var(--edge);min-height:400px;display:flex;align-items:center}
.cf-banner img{position:absolute;right:0;top:0;height:100%;width:62%;object-fit:cover}
.cf-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#1C1F2B 38%,rgba(28,31,43,.2) 70%)}
.cf-banner .wrap{position:relative;z-index:2;width:100%}
.cf-banner h2{font-size:clamp(26px,2.6vw,38px);font-weight:400;letter-spacing:-.02em;line-height:1.15;max-width:22ch;margin:12px 0 24px}
.cf-banner h2 span{color:rgba(255,255,255,.6)}
@media (max-width:900px){.cf-banner img{width:100%;opacity:.35}.cf-banner::after{background:rgba(28,31,43,.6)}}

/* movimento ridotto: tutte le scene mostrano lo stato finale, niente sticky */
@media (prefers-reduced-motion:reduce){
  .s1,.s2,.s3{height:auto}
  .story__stage{position:relative;height:auto;min-height:0}
  .s1 .story__stage{height:70svh}
  .story__cap,.s2__step,.cf-cell [data-k],.cf-svg .lab{opacity:1;transform:none;transition:none}
  .s2__txt{min-height:0}.s2__step{position:relative;margin-bottom:20px}
  .s3__list li{color:var(--ink)}
}

/* ritocchi dopo la prima cattura */
.s2 .story__stage{grid-template-columns:5fr 7fr;gap:40px}
.s2__prog{position:absolute;left:0;bottom:-8px;margin:0}
.s3__cell{width:min(480px,40vw)}
.s3__list .lvl{font-style:normal}
.s3__row{gap:72px}
@media (max-width:980px){.s2 .story__stage{grid-template-columns:1fr;gap:16px}.s2__prog{bottom:0}.s3__cell{width:min(280px,66vw)}}
.s3__list .lvl,.cf-tile .tag{font-size:11px}
.cf-tile .big small{font-size:max(.4em,13px)}
.cf-curve text{font-size:12px}

/* ===== versione istituzionale: fotografia vera + annotazioni a filo ===== */
.cf-hero{padding:48px 0 56px}
.cf-hero__txt{display:grid;grid-template-columns:7fr 5fr;gap:24px 56px;align-items:end;margin-bottom:40px}
.cf-hero__txt .t-label{grid-column:1/-1}
.cf-hero h1{font-weight:400;font-size:clamp(36px,4.2vw,60px);line-height:1.06;letter-spacing:-.03em;margin:0;max-width:18ch}
.cf-hero p{font-family:var(--serif);font-size:clamp(17px,1.35vw,20px);line-height:1.45;color:var(--ink);margin:0;max-width:44ch}
.cf-hero__facts{grid-column:1/-1;list-style:none;margin:8px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.cf-hero__facts li{padding:16px 16px 0 0}
.cf-hero__facts b{display:block;font-size:20px;font-weight:400;letter-spacing:-.01em}
.cf-hero__facts span{font-size:12px;color:var(--ink-2)}
.cf-hero__fig{margin:0 var(--edge);position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:21/8.4;background:var(--panel)}
.cf-hero__fig img{width:100%;height:100%;object-fit:cover;object-position:50% 45%}
.cf-hero__fig figcaption,.s2__cap,.s3__cell--photo figcaption{position:absolute;left:14px;bottom:12px;font-size:11px;font-weight:500;letter-spacing:.6px;background:rgba(255,255,252,.9);color:var(--ink);padding:5px 9px;border-radius:4px}
.cf-hero .cf-cue{margin-top:32px}
@media (max-width:900px){.cf-hero__txt{grid-template-columns:1fr}.cf-hero__facts{grid-template-columns:1fr 1fr}.cf-hero__fig{aspect-ratio:4/3}}

.s2__fig--photo{background:#EFE7E6}
.s2__photo{position:absolute;inset:0;overflow:hidden}
.s2__photo img{width:100%;height:100%;object-fit:cover;transform:scale(1.06);animation:cfdrift 26s ease-in-out infinite alternate}
@keyframes cfdrift{from{transform:scale(1.06) translateX(-1.5%)}to{transform:scale(1.06) translateX(1.5%)}}
@media (prefers-reduced-motion:reduce){.s2__photo img{animation:none}}
.cf-ov{position:absolute;inset:0;width:100%;height:100%}
.cf-ov text{font-family:var(--sans);font-size:22px;font-weight:500;fill:var(--ink);paint-order:stroke;stroke:rgba(255,255,252,.92);stroke-width:7px;stroke-linejoin:round}
.cf-ov .lead{stroke:var(--ink);stroke-width:1.6;fill:none}
.cf-ov .dim{stroke:var(--ink);stroke-width:1.6;fill:none}
.cf-ov .fib{stroke:#8E8E89;stroke-width:9;stroke-linecap:round;fill:none}
.cf-ov .fib-core{stroke:var(--wl);stroke-width:2.5;fill:none}
.cf-ov .tip{fill:#fff;stroke:var(--wl);stroke-width:3}
.cf-ov .cone{fill:url(#cfCone);opacity:0;transition:opacity .6s}
.cf-ov .tring{fill:none;stroke:var(--wl);stroke-width:3.5;stroke-dasharray:5 6;opacity:0;transition:opacity .4s}
.cf-ov .tring.on{opacity:1}
.cf-ov .lab{opacity:0;transition:opacity .45s}.cf-ov .lab.on{opacity:1}
.s2__cap{left:14px;bottom:12px}

.s3__cell--photo{position:relative;margin:0;width:min(640px,52vw);aspect-ratio:1000/565;border-radius:var(--r);overflow:hidden;background:#555}
.s3__cell--photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05)}
.cf-cell .mk circle{fill:#fff;stroke:var(--ink);stroke-width:2}
.cf-cell .mk text{font-family:var(--sans);font-size:17px;font-weight:600;text-anchor:middle;fill:var(--ink);stroke:none}
.cf-cell .mk.on circle{fill:var(--ink)}.cf-cell .mk.on text{fill:#fff}
.cf-cell .ph{stroke:var(--wl);stroke-width:3;stroke-dasharray:8 8;fill:none}
.cf-cell .out{stroke:#fff;stroke-width:2.4;stroke-dasharray:6 8;fill:none}
.cf-cell [data-k]{opacity:0;transition:opacity .5s var(--ease)}
.cf-cell [data-k].on{opacity:1}
.s3__row{gap:56px}
.s3__list li i{font-size:11px}
@media (max-width:980px){.s3__cell--photo{width:min(560px,92vw)}}
.s2__fig--photo{aspect-ratio:5/4;max-height:80vh}
.s2__fig--photo .s2__cap{top:12px;bottom:auto}
@media (max-width:980px){.s2__fig--photo{aspect-ratio:1/1;max-height:56vh}}
@media (max-width:980px){
  .s2__fig--photo .s2__cap{max-width:calc(100% - 180px);font-size:10px;line-height:1.35}
  .cf-ov text{font-size:34px;stroke-width:9px}
  .cf-ov .lab[data-s="2"],.cf-ov .lab[data-s="3"]{display:none}
}