/* i-socket.it - sito di presentazione (statico, nessuna dipendenza esterna) */
:root{
  --ink:#16181d;--ink-2:#3b3f48;--muted:#5d626d;--paper:#f6f3ee;--paper-2:#efebe4;--white:#fff;--line:#e3ddd3;
  --accent:#cc4700;--accent-h:#a83a00;--dark:#121316;--radius:20px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.6 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--display);margin:0;letter-spacing:-.025em;line-height:1.08}
h2{font-size:clamp(32px,4.6vw,54px);font-weight:700}
h3{font-size:20px;font-weight:650;letter-spacing:-.01em;line-height:1.25}
p{margin:0}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.center{text-align:center}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-h);margin-bottom:14px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}

/* pulsanti */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 26px;border-radius:999px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;font-size:16px;border:1.5px solid var(--ink);transition:transform .2s ease,background-color .2s ease,color .2s ease}
.btn:hover{background:#000;transform:translateY(-1px)}
.btn--sm{min-height:40px;padding:0 18px;font-size:14px;background:var(--accent);border-color:var(--accent)}
.btn--sm:hover{background:var(--accent-h);border-color:var(--accent-h)}
.btn--ghost{background:transparent;color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff}
.btn--wide{width:100%;background:var(--accent);border-color:var(--accent);min-height:56px;font-size:17px}
.btn--wide:hover{background:var(--accent-h);border-color:var(--accent-h)}
.btn--light{background:#fff;color:var(--ink);border-color:#fff}
.btn--light:hover{background:var(--paper);color:var(--ink)}
.link-arrow{display:inline-block;margin-top:22px;font-weight:600;color:var(--accent-h);text-decoration:none}
.link-arrow::after{content:" \2192";transition:margin .2s ease}
.link-arrow:hover::after{margin-left:4px}

/* intestazione */
.top{position:sticky;top:0;z-index:50;background:rgba(246,243,238,.82);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid transparent;transition:border-color .2s ease}
.top.is-scrolled{border-bottom-color:var(--line)}
.top__in{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo__mark{width:30px;height:30px;color:var(--ink)}
.logo__name{font-family:var(--display);font-weight:700;font-size:21px;letter-spacing:-.03em}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{text-decoration:none;font-size:15px;color:var(--ink-2)}
.nav a:hover{color:var(--ink)}

/* apertura */
.hero{position:relative;min-height:clamp(560px,84vh,780px);display:flex;align-items:center;overflow:hidden;background:#efe7dc}
.hero__img,.hero__img img{position:absolute;inset:0;width:100%;height:100%}
.hero__img img{object-fit:cover;object-position:62% 50%}
.hero__in{position:relative;padding-top:56px;padding-bottom:56px}
/* desktop: la foto sta a destra e sfuma nel colore del muro, cosi' il testo non finisce mai sopra le placche */
@media (min-width:900px){
  .hero{background:linear-gradient(90deg,#c3b7ab,#bfb3a7)}
  .hero__img{left:auto;right:0;width:min(74%,1320px)}
  .hero__img img{object-position:70% 50%;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 24%);mask-image:linear-gradient(90deg,transparent 0,#000 24%)}
}
.hero__in>*{max-width:500px}
.hero h1{font-size:clamp(44px,6.4vw,80px);font-weight:750;letter-spacing:-.04em}
.hero__lead{margin-top:22px;font-size:clamp(18px,1.6vw,21px);color:var(--ink-2);line-height:1.5}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.trust{list-style:none;margin:28px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px 20px;font-size:14px;color:var(--ink-2)}
.trust li{display:inline-flex;align-items:center;gap:8px}
.trust li::before{content:"";width:14px;height:8px;border-left:2px solid #1f8a4c;border-bottom:2px solid #1f8a4c;transform:rotate(-45deg) translateY(-2px)}

/* numeri */
.facts{background:var(--dark);color:#fff}
.facts__in{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:44px;padding-bottom:44px}
.fact strong{display:block;font-family:var(--display);font-size:clamp(44px,5vw,64px);font-weight:700;line-height:1;letter-spacing:-.04em}
.fact span{display:block;margin-top:8px;font-size:15px;color:#b9bcc4}

/* testo + immagine */
.split{padding:120px 0}
.split__in{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split__text p:not(.eyebrow){margin-top:22px;font-size:19px;color:var(--ink-2)}
.split__img img,.detail__img img{border-radius:var(--radius);box-shadow:0 30px 60px -30px rgba(22,24,29,.35)}
.split__img,.detail__img{margin:0}

/* vantaggi */
.features{padding:110px 0;background:var(--white)}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px}
.card{background:var(--paper);border-radius:var(--radius);padding:30px 26px}
.card svg{width:36px;height:36px;fill:none;stroke:var(--accent);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;margin-bottom:22px}
.card p{margin-top:10px;font-size:16px;color:var(--muted)}

/* serie */
.series{padding:120px 0}
.series__head{max-width:640px}
.series__body{display:grid;grid-template-columns:1.15fr 1fr;gap:56px;margin-top:48px;align-items:center}
.series__stage{background:var(--white);border-radius:28px;overflow:hidden;aspect-ratio:1/1}
.series__stage img{width:100%;height:100%;object-fit:cover;transition:opacity .25s ease}
.series__stage img.is-swapping{opacity:0}
.swatches{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.swatch{display:inline-flex;align-items:center;gap:10px;min-height:46px;padding:0 18px 0 12px;border-radius:999px;border:1.5px solid var(--line);background:var(--white);font:600 15px var(--font);color:var(--ink);cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease}
.swatch:hover{border-color:var(--ink-2)}
.swatch[aria-pressed="true"]{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.dot{width:22px;height:22px;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.18)}
.dot--light{background:#f4f4f2}
.dot--living{background:#26272b}
.dot--tech{background:linear-gradient(135deg,#c9ccd1,#8d9096)}
/* confezione: 1 presa / kit 2 / kit 4 (senza JavaScript restano i link nelle domande frequenti) */
.packs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:-12px 0 28px}
html:not(.js) .packs{display:none}
.pack{display:flex;flex-direction:column;align-items:flex-start;gap:2px;min-height:64px;padding:10px 14px;border-radius:16px;border:1.5px solid var(--line);background:var(--white);font:400 14px/1.25 var(--font);color:var(--muted);text-align:left;cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease}
.pack strong{font-size:15px;font-weight:600;color:var(--ink)}
.pack em{font-style:normal;font-size:12px;font-weight:600;color:#1f7a45}
.pack:hover{border-color:var(--ink-2)}
.pack[aria-pressed="true"]{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.swatch:focus-visible,.pack:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.series__panel h3{font-size:30px;letter-spacing:-.025em}
.series__finish{margin-top:10px;color:var(--muted)}
.price{margin:24px 0 18px;font-family:var(--display);font-size:34px;font-weight:700;letter-spacing:-.02em}
.price small{font-family:var(--font);font-size:14px;font-weight:400;color:var(--muted);letter-spacing:0}
.series__note{margin-top:14px;font-size:14px;color:var(--muted)}
.hint{margin-top:28px;padding:20px 22px;border-radius:16px;background:var(--paper-2);font-size:15px;color:var(--ink-2)}
.hint p{margin-top:4px}
.hint a{color:var(--accent-h);font-weight:600}

/* galleria */
.gallery{padding:110px 0;background:var(--white)}
.tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:48px}
.tile{position:relative;margin:0;border-radius:var(--radius);overflow:hidden}
.tile img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .6s ease}
.tile:hover img{transform:scale(1.03)}
.tile figcaption{position:absolute;left:16px;right:16px;bottom:16px;padding:16px 18px;border-radius:14px;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);font-size:15px;color:var(--ink-2);line-height:1.45}
.tile figcaption strong{display:block;color:var(--ink);font-size:16px}

/* dettaglio */
.detail{padding:120px 0}
.detail__in{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.specs{margin:30px 0 0;padding:0}
.specs div{display:grid;grid-template-columns:170px 1fr;gap:16px;padding:16px 0;border-top:1px solid var(--line)}
.specs div:last-child{border-bottom:1px solid var(--line)}
.specs dt{font-weight:600}
.specs dd{margin:0;color:var(--ink-2)}

/* installazione */
.steps{padding:110px 0;background:var(--white)}
.steps__list{list-style:none;margin:56px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:none}
.steps__list li{background:var(--paper);border-radius:var(--radius);padding:30px 26px}
.steps__n{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;margin-bottom:20px}
.steps__list p{margin-top:10px;color:var(--muted);font-size:16px}
.steps__note{margin-top:28px;text-align:center;font-size:15px;color:var(--muted)}

/* domande */
.faq{padding:120px 0}
.faq__in{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:start}
.faq__head p:not(.eyebrow){margin-top:18px;color:var(--ink-2)}
.faq__head a{color:var(--accent-h);font-weight:600}
.faq__list details{border-top:1px solid var(--line)}
.faq__list details:last-child{border-bottom:1px solid var(--line)}
.faq__list summary{list-style:none;cursor:pointer;padding:22px 40px 22px 0;font-weight:600;font-size:18px;position:relative}
.faq__list summary::-webkit-details-marker{display:none}
.faq__list summary::after{content:"";position:absolute;right:8px;top:50%;width:10px;height:10px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:translateY(-70%) rotate(45deg);transition:transform .2s ease}
.faq__list details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq__list details p{padding:0 0 22px;color:var(--ink-2)}
.faq__list a{color:var(--accent-h);font-weight:600}

/* chiusura */
.final{background:var(--dark);color:#fff;padding:110px 0;text-align:center}
.final__in>p:not(.final__small){margin:16px 0 30px;font-size:19px;color:#c9ccd3}
.final__small{margin-top:22px;font-size:14px;color:#9a9ea8}

/* piede */
.foot{background:var(--dark);color:#9a9ea8;border-top:1px solid #23252b;padding:44px 0 36px;font-size:14px}
.foot__in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px}
.foot .logo__name{color:#fff}
.foot p{margin-top:10px;line-height:1.7}
.foot a{color:#d6d8dd;text-decoration:none}
.foot p a{text-decoration:underline;text-underline-offset:3px}
.foot a:hover{color:#fff;text-decoration:underline}
.foot nav{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:flex-start}
.foot__legal{margin-top:28px;font-size:13px;color:#7d818b}

/* comparsa al passaggio */
/* nascosti solo se JavaScript e' attivo (classe "js" messa in <head>): senza JS si vede tutto */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .tile img,.btn{transition:none}
}

/* tablet */
@media (max-width:1080px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .split__in,.detail__in{gap:48px}
}
/* mobile */
@media (max-width:899px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .nav{display:none}
  .top__in{height:60px;justify-content:space-between}
  .hero{display:block;min-height:0;background:var(--paper)}
  .hero__img{position:relative;display:block;aspect-ratio:4/3;order:2}
  .hero__img img{position:absolute;object-position:50% 50%}
  .hero{display:flex;flex-direction:column}
  .hero__in{order:1;padding-top:36px;padding-bottom:28px}
  .hero__in>*{max-width:none}
  .facts__in{grid-template-columns:repeat(2,1fr);gap:28px 16px;padding-top:36px;padding-bottom:36px}
  .split,.features,.series,.gallery,.detail,.steps,.faq,.final{padding:72px 0}
  .split__in,.detail__in,.series__body,.faq__in{grid-template-columns:1fr;gap:36px}
  .detail__img{order:2}
  .cards{grid-template-columns:1fr;margin-top:36px}
  .tiles{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px;margin:36px -16px 0;padding:0 16px 8px;scrollbar-width:none}
  .tiles::-webkit-scrollbar{display:none}
  .tile{flex:0 0 85%;scroll-snap-align:center}
  .steps__list{grid-template-columns:1fr;margin-top:36px}
  .specs div{grid-template-columns:1fr;gap:2px}
  .series__panel h3{font-size:26px}
}