/* ============================================================
   IL PULITO CHE CONVIENE — style.css
   Palette e tipografia derivate dalla creatività ufficiale.
   ============================================================ */

:root{
  --blu-900:#0B3D7A;
  --blu-800:#0A4E92;
  --blu-700:#0B5FA8;
  --blu-600:#0E6CB5;
  --blu-500:#1F86C9;
  --cielo-200:#BFE9F2;
  --cielo-100:#DFF4FA;
  --cielo-050:#F2FBFD;
  --giallo:#FFB612;
  --giallo-600:#F6A800;
  --teal:#2FB4C7;
  --ink:#123F73;
  --carta:#FBF4E4;
  --carta-scura:#EFE3C8;
  --bianco:#FFFFFF;

  --font-display:'Baloo 2','Arial Rounded MT Bold',system-ui,sans-serif;
  --font-body:'Nunito',system-ui,-apple-system,'Segoe UI',sans-serif;

  --container:1120px;
  --radius:20px;
  --shadow-card:0 10px 30px rgba(11,61,122,.12);
  --shadow-lift:0 18px 40px rgba(11,61,122,.18);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --ease-out:cubic-bezier(.22,.8,.3,1);
}

/* ---------- Reset essenziale ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.6;
  color:var(--ink);
  background:var(--bianco);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
picture{display:block}
a{color:var(--blu-700)}
address{font-style:normal}
strong{font-weight:800}

.container{max-width:var(--container);margin-inline:auto;padding-inline:24px}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:16px;top:-60px;z-index:100;
  background:var(--giallo);color:var(--blu-900);
  padding:10px 18px;border-radius:0 0 12px 12px;
  font-weight:800;text-decoration:none;transition:top .25s var(--ease-out);
}
.skip-link:focus{top:0}

:where(a,button,summary):focus-visible{
  outline:3px solid var(--giallo);outline-offset:3px;border-radius:6px;
}

/* ============================================================
   HERO — banner ufficiale, switch desktop/mobile a 860px
   ============================================================ */
.hero{position:relative;background:var(--cielo-100)}
.hero--desktop,.hero--mobile{position:relative;overflow:hidden}
.hero--desktop{display:block}
.hero--mobile{display:none}
.hero__banner,.hero--mobile img{width:100%;height:auto}

/* Riflesso che attraversa il banner una sola volta dopo il load */
.hero__shine{
  position:absolute;top:-20%;bottom:-20%;left:-30%;width:22%;
  background:linear-gradient(105deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,.55) 45%,
    rgba(255,255,255,0) 100%);
  transform:skewX(-18deg);
  pointer-events:none;opacity:0;
}
html.js .hero__shine{animation:shine 1.4s var(--ease-out) 1s 1 forwards}
@keyframes shine{
  0%{left:-30%;opacity:0}
  15%{opacity:1}
  100%{left:130%;opacity:0}
}

html.js .fade-hero{opacity:0;transform:scale(1.015)}
html.js .fade-hero.in,
html.js.loaded .fade-hero{
  opacity:1;transform:scale(1);
  transition:opacity .8s var(--ease-out),transform 1.2s var(--ease-out);
}

@media (max-width:860px){
  .hero--desktop{display:none}
  .hero--mobile{display:block;max-width:640px;margin-inline:auto}
}

/* ============================================================
   STRIP date + CTA
   ============================================================ */
.strip{background:var(--blu-800);color:#fff;position:relative;z-index:5}
html.js .strip{transform:translateY(-14px);opacity:0}
html.js.loaded .strip{
  transform:none;opacity:1;
  transition:transform .7s var(--ease-spring) .25s,opacity .5s ease .25s;
}
.strip__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding-block:14px;flex-wrap:wrap;
}
.strip__text{margin:0;font-size:1rem}
.strip__text strong{color:var(--giallo)}

/* ============================================================
   BOTTONI
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:700;font-size:1.05rem;
  text-decoration:none;border-radius:999px;padding:13px 26px;
  transition:transform .3s var(--ease-spring),box-shadow .3s ease,background .25s ease;
  will-change:transform;
}
.btn .ico{width:20px;height:20px;transition:transform .3s var(--ease-spring)}
.btn:hover{transform:translateY(-3px)}
.btn:hover .ico{transform:translateY(2px)}
.btn:active{transform:translateY(-1px) scale(.98)}

.btn--ghost{
  color:#fff;border:2px solid rgba(255,255,255,.85);
  background:rgba(255,255,255,.06);
}
.btn--ghost:hover{background:rgba(255,255,255,.16);box-shadow:0 8px 20px rgba(0,0,0,.18)}

.btn--primary{
  color:var(--blu-900);background:var(--giallo);
  box-shadow:0 10px 24px rgba(246,168,0,.4);
  border:2px solid transparent;
}
.btn--primary:hover{background:#FFC23A;box-shadow:0 16px 32px rgba(246,168,0,.5)}

.btn--pulse{position:relative}
.btn--pulse::after{
  content:"";position:absolute;inset:-7px;border-radius:inherit;
  border:3px solid rgba(255,182,18,.65);opacity:0;
}
html.js .btn--pulse.in::after{animation:pulse 2.2s ease-out .8s infinite}
@keyframes pulse{
  0%{transform:scale(.92);opacity:.9}
  70%{transform:scale(1.12);opacity:0}
  100%{opacity:0}
}

/* ============================================================
   SEZIONI, TITOLI, REVEAL
   ============================================================ */
.section{padding-block:clamp(56px,8vw,96px);position:relative}

.eyebrow{
  display:inline-block;margin:0 0 6px;
  font-family:var(--font-display);font-weight:700;font-size:.95rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--teal);
}
.eyebrow--light{color:var(--cielo-200)}

.section__title{
  margin:0 0 18px;font-family:var(--font-display);font-weight:800;
  font-size:clamp(1.9rem,4.2vw,2.9rem);line-height:1.12;color:var(--blu-800);
}
.section__title--light{color:#fff}
.section__sub{margin:0 0 34px;font-size:1.1rem;max-width:56ch}
.section--busta .section__sub{color:var(--cielo-100)}

/* Reveal allo scroll (solo con JS attivo) */
html.js .reveal{opacity:0;transform:translateY(24px)}
html.js .reveal.in{
  opacity:1;transform:none;
  transition:opacity .7s ease,transform .8s var(--ease-out);
}

/* ============================================================
   COME PARTECIPARE — step
   ============================================================ */
#come-partecipare{background:var(--bianco)}

.steps{
  list-style:none;margin:44px 0 0;padding:0;position:relative;
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;
  counter-reset:step;
}
.steps__line{
  position:absolute;top:26px;left:6%;width:88%;height:40px;
  color:var(--cielo-200);z-index:0;pointer-events:none;
}
html.js .steps__line{clip-path:inset(0 100% 0 0)}
html.js .steps__line.in{
  clip-path:inset(0 0 0 0);
  transition:clip-path 1.3s var(--ease-out) .35s;
}

.step{
  position:relative;z-index:1;
  background:var(--cielo-050);
  border:2px solid var(--cielo-200);
  border-radius:var(--radius);
  padding:58px 26px 26px;
  box-shadow:var(--shadow-card);
  transition:transform .35s var(--ease-spring),box-shadow .35s ease;
}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-lift)}

html.js .reveal-step{opacity:0;transform:translateY(28px) scale(.97)}
html.js .reveal-step.in{
  opacity:1;transform:none;
  transition:
    opacity .6s ease calc(var(--i)*.14s),
    transform .7s var(--ease-spring) calc(var(--i)*.14s);
}

.step__num{
  position:absolute;top:-26px;left:26px;
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--giallo);color:var(--blu-900);
  font-family:var(--font-display);font-weight:800;font-size:1.5rem;
  box-shadow:0 8px 18px rgba(246,168,0,.45);
}
html.js .reveal-step .step__num{transform:scale(0)}
html.js .reveal-step.in .step__num{
  transform:scale(1);
  transition:transform .6s var(--ease-spring) calc(.25s + var(--i)*.14s);
}

.step__title{
  margin:0 0 10px;font-family:var(--font-display);font-weight:800;
  font-size:1.35rem;color:var(--blu-700);
}
.step p{margin:0 0 12px}
.step address{
  margin:0 0 12px;padding:12px 16px;border-radius:12px;
  background:#fff;border:2px dashed var(--cielo-200);
  font-weight:700;line-height:1.45;
}
.note{
  display:block;font-size:.88rem;color:var(--blu-700);
  background:rgba(47,180,199,.12);border-radius:10px;padding:8px 12px;
}

/* Accordion insegne */
.insegne{margin-top:14px}
.insegne summary{
  cursor:pointer;list-style:none;display:inline-flex;align-items:center;gap:8px;
  font-weight:800;color:var(--blu-700);
}
.insegne summary::-webkit-details-marker{display:none}
.insegne summary::after{
  content:"";width:9px;height:9px;
  border-right:3px solid currentColor;border-bottom:3px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  transition:transform .3s var(--ease-spring);
}
.insegne[open] summary::after{transform:rotate(225deg) translateY(-1px)}
.insegne__body{padding-top:12px}
.insegne__group{margin:0 0 10px;font-size:.9rem}
.insegne__group strong{display:block;color:var(--blu-800);margin-bottom:4px}
.chip{
  display:inline-block;margin:3px 4px 3px 0;padding:4px 11px;
  background:#fff;border:1.5px solid var(--cielo-200);border-radius:999px;
  font-size:.8rem;font-weight:700;color:var(--blu-700);white-space:nowrap;
}
html.js .insegne[open] .chip{animation:chipIn .45s var(--ease-spring) both;animation-delay:calc(var(--i,0)*.035s)}
@keyframes chipIn{
  from{opacity:0;transform:translateY(8px) scale(.85)}
  to{opacity:1;transform:none}
}

@media (max-width:900px){
  .steps{grid-template-columns:1fr;gap:44px}
  .steps__line{display:none}
}

/* ============================================================
   BOLLE decorative (sezioni blu)
   ============================================================ */
.bubbles{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.bubbles span{
  position:absolute;bottom:-80px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.35),rgba(255,255,255,.08));
  border:1px solid rgba(255,255,255,.25);
}
.bubbles span:nth-child(1){left:8%;width:26px;height:26px}
.bubbles span:nth-child(2){left:22%;width:14px;height:14px}
.bubbles span:nth-child(3){left:41%;width:34px;height:34px}
.bubbles span:nth-child(4){left:63%;width:18px;height:18px}
.bubbles span:nth-child(5){left:78%;width:28px;height:28px}
.bubbles span:nth-child(6){left:91%;width:12px;height:12px}
html.js .bubbles span{animation:rise linear infinite}
html.js .bubbles span:nth-child(1){animation-duration:11s;animation-delay:.3s}
html.js .bubbles span:nth-child(2){animation-duration:14s;animation-delay:2.4s}
html.js .bubbles span:nth-child(3){animation-duration:9.5s;animation-delay:1.1s}
html.js .bubbles span:nth-child(4){animation-duration:13s;animation-delay:3.6s}
html.js .bubbles span:nth-child(5){animation-duration:10.5s;animation-delay:.9s}
html.js .bubbles span:nth-child(6){animation-duration:15s;animation-delay:5s}
@keyframes rise{
  0%{transform:translateY(0);opacity:0}
  8%{opacity:1}
  92%{opacity:1}
  100%{transform:translateY(-115vh) translateX(14px);opacity:0}
}

/* ============================================================
   SEZIONE BUSTA 3D
   ============================================================ */
.section--busta{
  background:linear-gradient(180deg,var(--blu-600) 0%,var(--blu-800) 100%);
  color:#fff;overflow:hidden;
}
.section--busta::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:52px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 60' preserveAspectRatio='none'%3E%3Cpath d='M0,0 H1200 V18 C1000,58 800,-8 600,26 C400,58 200,4 0,34 Z' fill='%23FFFFFF'/%3E%3C/svg%3E") center/100% 100% no-repeat;
}

.scene{perspective:1300px;margin:clamp(150px,32vw,225px) auto 0;max-width:600px}
.busta{
  position:relative;width:100%;aspect-ratio:3/2.02;
  transform-style:preserve-3d;transform:rotateX(7deg);
}
html.js .busta.is-open{animation:bustaBob 6s ease-in-out 3s infinite alternate}
@keyframes bustaBob{
  from{transform:rotateX(7deg) translateY(0)}
  to{transform:rotateX(7deg) translateY(-8px)}
}

.busta__back{
  position:absolute;inset:0;border-radius:12px;
  background:
    repeating-linear-gradient(0deg,rgba(11,61,122,.03) 0 2px,transparent 2px 5px),
    linear-gradient(160deg,var(--carta) 0%,var(--carta-scura) 100%);
  box-shadow:0 30px 60px rgba(0,0,0,.35);
  z-index:1;
}

/* Lettera: parte nascosta nella busta, sale quando .is-open */
.busta__letter{
  position:absolute;left:5%;right:5%;top:5%;bottom:7%;
  background:linear-gradient(180deg,#fff 0%,#F4FAFD 100%);
  border-radius:10px;box-shadow:0 10px 28px rgba(11,61,122,.25);
  padding:clamp(14px,3.5vw,24px) clamp(16px,4vw,28px);
  z-index:2;transform:translateY(4%);
}
html.js .busta.is-open .busta__letter{
  transform:translateY(-62%);
  transition:transform 1s var(--ease-spring) .55s;
}
.letter__title{
  margin:0 0 10px;font-family:var(--font-display);font-weight:800;
  color:var(--blu-800);font-size:clamp(1rem,2.6vw,1.25rem);
  letter-spacing:.02em;
}
.letter__list{list-style:none;margin:0;padding:0}
.letter__list li{
  position:relative;padding:5px 0 5px 36px;
  font-size:clamp(.8rem,2.1vw,.95rem);line-height:1.4;color:var(--ink);
}
.letter__list li::before{
  content:"";position:absolute;left:0;top:7px;width:20px;height:20px;
  border:2.5px solid var(--blu-500);border-radius:6px;background:#fff;
}
.letter__list li::after{
  content:"";position:absolute;left:5px;top:11px;width:10px;height:6px;
  border-left:3px solid var(--giallo-600);border-bottom:3px solid var(--giallo-600);
  transform:rotate(-45deg) scale(0);transform-origin:center;
}
html.js .busta.is-open .letter__list li::after{
  animation:checkPop .45s var(--ease-spring) forwards;
  animation-delay:calc(1.45s + var(--i)*.3s);
}
@keyframes checkPop{
  from{transform:rotate(-45deg) scale(0)}
  60%{transform:rotate(-45deg) scale(1.3)}
  to{transform:rotate(-45deg) scale(1)}
}

/* Tasca frontale con piega a V */
.busta__pocket{
  position:absolute;left:0;right:0;bottom:0;height:64%;
  background:
    linear-gradient(105deg,rgba(11,61,122,.10) 0 1.5px,transparent 1.5px 50%,rgba(11,61,122,.10) 50% calc(50% + 1.5px),transparent calc(50% + 1.5px)) ,
    linear-gradient(180deg,var(--carta) 0%,var(--carta-scura) 100%);
  clip-path:polygon(0 0,50% 42%,100% 0,100% 100%,0 100%);
  border-radius:0 0 12px 12px;
  z-index:3;
  box-shadow:inset 0 6px 12px rgba(11,61,122,.08);
}
.busta__address{
  position:absolute;left:50%;transform:translateX(-50%);
  bottom:12%;width:min(78%,420px);
  font-weight:800;color:var(--blu-900);
  font-size:clamp(.72rem,2vw,.95rem);line-height:1.45;text-align:left;
}
.addr__to{
  display:inline-block;font-family:var(--font-display);
  color:var(--blu-500);margin-right:6px;
}
.busta__lines{position:absolute;left:7%;top:52%;display:grid;gap:6px}
.busta__lines i{width:70px;height:3px;border-radius:3px;background:rgba(11,61,122,.18)}
.busta__lines i:nth-child(2){width:52px}
.busta__lines i:nth-child(3){width:60px}

/* Linguetta superiore che si apre in 3D */
.busta__flap{
  position:absolute;left:0;right:0;top:0;height:52%;
  transform-origin:top center;transform-style:preserve-3d;
  z-index:4;
}
.busta__flap::before,
.flap__inner{
  content:"";position:absolute;inset:0;
  clip-path:polygon(0 0,100% 0,50% 100%);
}
.busta__flap::before{
  background:linear-gradient(180deg,var(--carta) 0%,#E7D8B6 100%);
  border-radius:12px 12px 0 0;
  backface-visibility:hidden;
  box-shadow:inset 0 -10px 16px rgba(11,61,122,.10);
}
.flap__inner{
  background:linear-gradient(180deg,#E2D2AC 0%,#D8C79E 100%);
  transform:rotateX(180deg);backface-visibility:hidden;
  border-radius:12px 12px 0 0;
}
html.js .busta.is-open .busta__flap{animation:flapOpen 1s var(--ease-out) forwards}
@keyframes flapOpen{
  0%{transform:rotateX(0deg);z-index:4}
  55%{z-index:4}
  56%{z-index:1}
  100%{transform:rotateX(-172deg);z-index:1}
}

/* Francobollo + timbro */
.busta__stamp{
  position:absolute;top:6%;right:6%;z-index:5;
  background:#fff;padding:5px;border-radius:4px;
  border:2px dashed var(--cielo-200);
  box-shadow:0 4px 10px rgba(11,61,122,.25);
  transform:rotate(3deg);
}
.busta__stamp img{width:clamp(40px,9vw,60px);height:auto;border-radius:2px}

.busta__postmark{
  position:absolute;top:3%;right:14%;z-index:6;
  width:clamp(70px,16vw,104px);color:var(--blu-900);
  opacity:.85;mix-blend-mode:multiply;
  transform:rotate(-12deg);
}
.busta__postmark svg{width:100%;height:auto}
html.js .busta:not(.is-open) .busta__postmark{opacity:0}
html.js .busta.is-open .busta__postmark{animation:stampIn .55s var(--ease-spring) .25s both}
@keyframes stampIn{
  from{transform:rotate(-30deg) scale(1.8);opacity:0}
  to{transform:rotate(-12deg) scale(1);opacity:.85}
}

.busta__caption{
  margin:44px auto 0;text-align:center;color:var(--cielo-100);
  max-width:52ch;font-size:.95rem;
}
.busta__caption strong{color:var(--giallo)}

/* ============================================================
   PREMIO — palco a livelli: ombra → tagliere → coltello
   ============================================================ */
.section--premio{background:var(--cielo-100);overflow:hidden}
.section--premio::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:52px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 60' preserveAspectRatio='none'%3E%3Cpath d='M0,0 H1200 V22 C980,60 760,-4 560,28 C360,58 180,8 0,38 Z' fill='%230A4E92'/%3E%3C/svg%3E") center/100% 100% no-repeat;
}

.premio__grid{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.premio__copy p{max-width:46ch}
.premio__note{font-size:.85rem;color:var(--blu-700);opacity:.85}
.excelsa{color:var(--teal)}

.premio__stage{
  position:relative;width:min(540px,100%);aspect-ratio:100/104;
  margin-inline:auto;
}
.premio__stage::before{
  content:"";position:absolute;inset:-6% -10% -2%;z-index:0;border-radius:38% 42% 40% 44%;
  background:
    radial-gradient(58% 52% at 52% 46%,rgba(255,255,255,.75) 0%,rgba(255,255,255,0) 60%),
    radial-gradient(closest-side at 50% 52%,var(--blu-500) 0%,var(--blu-700) 62%,rgba(11,95,168,0) 78%);
}
html.js #stage:not(.is-live)::before{opacity:0}
html.js #stage.is-live::before{animation:haloIn 1s var(--ease-out) both}
@keyframes haloIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.stage__ombra,.stage__tagliere,.stage__coltello{
  position:absolute;will-change:transform;
}
.stage__ombra{left:34%;top:40%;width:52%;z-index:1;filter:blur(1px)}
.stage__tagliere{left:4%;top:30%;width:86%;z-index:2}
.stage__coltello{left:46%;top:3.5%;width:51.5%;z-index:3;
  filter:drop-shadow(-6px 10px 10px rgba(11,61,122,.30));
}
.stage__coltello img{transition:transform .45s var(--ease-spring)}
@media (hover:hover) and (pointer:fine){
  .premio__stage:hover .stage__coltello img{transform:translateY(-9px) rotate(.8deg)}
}

/* Stato iniziale (solo JS) e coreografia d'ingresso */
html.js #stage:not(.is-live) .stage__ombra,
html.js #stage:not(.is-live) .stage__tagliere,
html.js #stage:not(.is-live) .stage__coltello{opacity:0}

html.js #stage.is-live .stage__ombra{
  animation:
    ombraIn .8s var(--ease-out) .15s both,
    ombraBreathe 4.6s ease-in-out 1s infinite alternate;
}
html.js #stage.is-live .stage__tagliere{
  animation:
    boardIn .95s var(--ease-out) both,
    boardIdle 8s ease-in-out 1s infinite alternate;
}
html.js #stage.is-live .stage__coltello{
  animation:
    knifeDrop 1.05s var(--ease-out) .4s both,
    knifeFloat 4.2s ease-in-out 1.5s infinite alternate;
}

@keyframes boardIn{
  0%{opacity:0;transform:translateX(-70px) rotate(-7deg)}
  70%{opacity:1;transform:translateX(4px) rotate(1.2deg)}
  100%{opacity:1;transform:translateX(0) rotate(0)}
}
@keyframes boardIdle{
  from{transform:rotate(-.4deg)}
  to{transform:rotate(.4deg)}
}
@keyframes ombraIn{
  from{opacity:0;transform:scale(.55)}
  to{opacity:1;transform:scale(1)}
}
@keyframes ombraBreathe{
  from{opacity:.9;transform:scale(1)}
  to{opacity:1;transform:scale(1.05)}
}
@keyframes knifeDrop{
  0%{opacity:0;transform:translateY(-110px) rotate(9deg)}
  55%{opacity:1;transform:translateY(8px) rotate(-2deg)}
  75%{transform:translateY(-5px) rotate(1deg)}
  100%{opacity:1;transform:translateY(0) rotate(0)}
}
@keyframes knifeFloat{
  from{transform:translateY(0) rotate(0)}
  to{transform:translateY(-7px) rotate(.6deg)}
}

/* Scintille */
.spark{
  position:absolute;width:16px;height:16px;z-index:4;opacity:0;
  background:var(--giallo);
  clip-path:polygon(50% 0,62% 38%,100% 50%,62% 62%,50% 100%,38% 62%,0 50%,38% 38%);
  filter:drop-shadow(0 0 6px rgba(255,182,18,.85));
}
.spark--1{top:6%;left:40%}
.spark--2{top:26%;left:88%;width:11px;height:11px}
.spark--3{top:66%;left:6%;width:12px;height:12px}
.spark--4{top:88%;left:70%;width:9px;height:9px}
html.js #stage.is-live .spark{animation:twinkle 2.8s ease-in-out infinite}
html.js #stage.is-live .spark--1{animation-delay:1.2s}
html.js #stage.is-live .spark--2{animation-delay:2s}
html.js #stage.is-live .spark--3{animation-delay:2.7s}
html.js #stage.is-live .spark--4{animation-delay:3.4s}
@keyframes twinkle{
  0%,100%{opacity:0;transform:scale(.4) rotate(0deg)}
  50%{opacity:1;transform:scale(1) rotate(40deg)}
}

@media (max-width:940px){
  .premio__grid{grid-template-columns:1fr;gap:20px}
  .premio__stage{order:-1;width:min(440px,92%)}
}

/* ============================================================
   CTA FINALE
   ============================================================ */
.cta{
  position:relative;overflow:hidden;text-align:center;
  padding-block:clamp(64px,9vw,110px);
  background:linear-gradient(180deg,var(--blu-600) 0%,var(--blu-900) 100%);
  color:#fff;
}
.cta::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:52px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 60' preserveAspectRatio='none'%3E%3Cpath d='M0,0 H1200 V18 C1000,58 800,-8 600,26 C400,58 200,4 0,34 Z' fill='%23DFF4FA'/%3E%3C/svg%3E") center/100% 100% no-repeat;
}
.cta .container{position:relative}
.cta__hint{margin:0 0 26px;color:var(--cielo-100);font-size:1.1rem}
.cta__meta{display:block;margin-top:14px;font-size:.85rem;color:var(--cielo-200)}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{
  background:var(--blu-900);color:rgba(255,255,255,.88);
  padding-block:38px 110px;font-size:.82rem;line-height:1.65;
}
.footer p{margin:0 0 12px;max-width:100ch}
.footer a{color:var(--giallo);font-weight:700;text-decoration-thickness:2px}
.footer a:hover{color:#FFC94F}
.footer__contact{font-size:.9rem}
.footer__small{opacity:.75}

/* ============================================================
   STICKY CTA
   ============================================================ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;justify-content:center;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  pointer-events:none;
  transform:translateY(120%);
}
html.js .sticky-cta.is-visible{
  transform:none;
  transition:transform .55s var(--ease-spring);
}
html.js .sticky-cta{transition:transform .4s var(--ease-out)}
.sticky-cta .btn{pointer-events:auto;box-shadow:0 12px 30px rgba(11,61,122,.45)}

/* ============================================================
   NO-JS: tutto visibile e busta già aperta
   ============================================================ */
html:not(.js) .busta__letter{transform:translateY(-62%)}
html:not(.js) .busta__flap{transform:rotateX(-172deg);z-index:1}
html:not(.js) .letter__list li::after{transform:rotate(-45deg) scale(1)}
html:not(.js) .sticky-cta{display:none}

/* ============================================================
   PREFERS-REDUCED-MOTION: stati finali, zero animazioni
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.js .reveal,html.js .reveal-step{opacity:1;transform:none}
  html.js .reveal-step .step__num{transform:scale(1)}
  html.js .steps__line{clip-path:inset(0 0 0 0)}
  html.js .fade-hero{opacity:1;transform:none}
  html.js .strip{opacity:1;transform:none}
  html.js .busta__letter{transform:translateY(-62%) !important;transition:none}
  html.js .busta__flap{transform:rotateX(-172deg) !important;z-index:1;animation:none !important}
  html.js .letter__list li::after{transform:rotate(-45deg) scale(1);animation:none !important}
  html.js .busta__postmark{opacity:.85 !important}
  html.js #stage .stage__ombra,
  html.js #stage .stage__tagliere,
  html.js #stage .stage__coltello{opacity:1 !important;animation:none !important}
  .spark{display:none}
}

/* ============================================================
   RIFINITURE RESPONSIVE
   ============================================================ */
@media (max-width:640px){
  .strip__inner{justify-content:center;text-align:center}
  .step{padding:52px 20px 22px}
  .busta__caption{margin-top:34px}
  .busta{transform:rotateX(5deg)}
}