/* ============================================================
   REVOLT — design tokens
   Nero materico dei materiali aziendali + blu cavo campionato
   dalle immagini prodotto Etrotek (#57A9E4).
   Montserrat (dal file .ai) per il display, Source Sans 3 per
   il testo, JetBrains Mono per codici e dati tecnici.
   ============================================================ */
:root{
  --nero:#0B0B0C;
  --carbon:#131316;
  --carbon-2:#191920;
  --line:rgba(255,255,255,.13);
  --line-soft:rgba(255,255,255,.07);
  --white:#fff;
  --grey:#C8C8CE;
  --grey-dim:#95959D;
  --volt:#57A9E4;
  --volt-dim:rgba(87,169,228,.18);

  --display:"Montserrat",system-ui,sans-serif;
  --body:"Source Sans 3",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;

  --wrap:1280px;
  --pad:clamp(20px,5vw,64px);
  --sec:clamp(72px,10vw,140px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--nero);color:var(--white);
  font-family:var(--body);font-size:clamp(16px,1.05vw,17.5px);line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);font-weight:700;margin:0;line-height:1.04;letter-spacing:-.02em;text-transform:uppercase}
p{margin:0}
::selection{background:var(--volt);color:#04121e}
:focus-visible{outline:2px solid var(--volt);outline-offset:3px}

.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.section{padding-block:var(--sec);position:relative}

/* ---------- micro-tipografia di sistema ---------- */
.eyebrow{
  font-family:var(--display);font-weight:600;font-size:.72rem;
  letter-spacing:.34em;text-transform:uppercase;color:var(--white);
  display:inline-flex;align-items:center;gap:.7em;margin-bottom:26px;
}
.eyebrow::before{content:"[";color:var(--volt);font-weight:500;letter-spacing:0}
.eyebrow::after{content:"]";color:var(--volt);font-weight:500;letter-spacing:0}
.code{font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;color:var(--volt)}
.lead{color:var(--grey);font-size:clamp(1.02rem,1.35vw,1.2rem);max-width:62ch}
.h2{font-size:clamp(2rem,4.6vw,3.6rem)}
.h3{font-size:clamp(1.25rem,2vw,1.6rem)}

/* leader punteggiato: citazione diretta dei richiami tecnici del catalogo */
.leader{display:flex;align-items:center;gap:14px;color:var(--grey);font-size:.9rem}
.leader::before{content:"";width:7px;height:7px;border-radius:50%;border:1px solid var(--volt);flex:none}
.leader-line{flex:1;height:1px;background-image:linear-gradient(90deg,var(--line) 50%,transparent 0);background-size:6px 1px;min-width:24px}
@media(max-width:700px){.leader{flex-wrap:wrap;row-gap:8px}.leader .code{width:100%;padding-left:21px}}

/* ---------- bottoni ---------- */
.btn{
  --bg:var(--white);--fg:#0B0B0C;
  display:inline-flex;align-items:center;gap:.75em;
  font-family:var(--display);font-weight:700;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;
  background:var(--bg);color:var(--fg);padding:16px 26px;border:1px solid var(--bg);
  transition:transform .35s var(--ease),background .3s,color .3s,border-color .3s;
  position:relative;overflow:hidden;
}
.btn svg{flex:none;transition:transform .35s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn:hover svg{transform:translateY(2px)}
.btn--ghost{--bg:transparent;--fg:#fff;border-color:var(--line)}
.btn--ghost:hover{border-color:var(--white)}
.btn--volt{--bg:var(--volt);--fg:#04121e}
.btn--volt:hover{--bg:#7cc0f0}
.btn--lg{padding:20px 34px;font-size:.9rem}

/* ---------- header ---------- */
.hdr{
  position:fixed;inset:0 0 auto;z-index:60;
  border-bottom:1px solid transparent;transition:background .4s,border-color .4s,backdrop-filter .4s;
}
.hdr.is-stuck{background:rgba(11,11,12,.86);backdrop-filter:blur(14px);border-bottom-color:var(--line-soft)}
.hdr__in{display:flex;align-items:center;gap:28px;height:78px;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.hdr__logo{display:flex;align-items:center;margin-right:auto;flex:none}
.hdr__logo img{height:56px;width:auto;display:block}
.nav{display:flex;gap:30px}
.nav a{
  font-family:var(--display);font-weight:600;font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--grey);padding:6px 0;position:relative;transition:color .25s;
}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--volt);transition:width .35s var(--ease)}
.nav a:hover{color:#fff}
.nav a:hover::after{width:100%}
.hdr .btn{padding:12px 18px;font-size:.72rem}
.burger{display:none;width:44px;height:44px;background:none;border:1px solid var(--line);color:#fff;cursor:pointer;align-items:center;justify-content:center;padding:0}
.burger span{display:block;width:18px;height:1px;background:#fff;position:relative;transition:.3s}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:1px;background:#fff;transition:.3s}
.burger span::before{top:-6px}.burger span::after{top:6px}
body.nav-open .burger span{background:transparent}
body.nav-open .burger span::before{transform:rotate(45deg);top:0}
body.nav-open .burger span::after{transform:rotate(-45deg);top:0}

@media(max-width:960px){
  .nav{
    position:fixed;inset:78px 0 auto;flex-direction:column;gap:0;
    background:rgba(11,11,12,.97);backdrop-filter:blur(16px);
    padding:8px var(--pad) 28px;border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .45s var(--ease);
  }
  body.nav-open .nav{transform:none}
  .nav a{font-size:1rem;padding:18px 0;border-bottom:1px solid var(--line-soft);color:#fff}
  .burger{display:flex}
  .hdr__logo img{height:48px}
  .hdr__cta-text{display:none}
  .hdr .btn{padding:12px 14px}
}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;padding-top:120px;padding-bottom:60px;overflow:hidden}
.hero__grid{
  position:absolute;inset:0;z-index:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(120% 90% at 78% 55%,#000 0%,rgba(0,0,0,.5) 42%,transparent 72%);
  mask-image:radial-gradient(120% 90% at 78% 55%,#000 0%,rgba(0,0,0,.5) 42%,transparent 72%);
  opacity:.20;animation:drift 26s linear infinite;
}
@keyframes drift{to{background-position:26px 26px}}
.hero__glow{
  position:absolute;z-index:0;right:-10%;top:20%;width:70vw;height:70vw;max-width:900px;max-height:900px;
  background:radial-gradient(circle,rgba(87,169,228,.13),transparent 62%);pointer-events:none;
}
.hero__mark{
  position:absolute;z-index:0;right:-4%;top:50%;translate:0 -50%;width:min(46vw,620px);
  opacity:.07;filter:drop-shadow(0 0 60px rgba(87,169,228,.5));
}
.hero__in{position:relative;z-index:1;width:100%}
.hero h1{
  font-size:clamp(2.6rem,7.4vw,6.1rem);font-weight:800;letter-spacing:-.035em;
  max-width:16ch;margin-bottom:28px;
}
.hero h1 em{font-style:normal;color:var(--volt);position:relative;white-space:nowrap}
.hero__sub{max-width:54ch;color:var(--grey);font-size:clamp(1.05rem,1.5vw,1.3rem)}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:42px}
.hero__badges{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(22px,4vw,46px);margin-top:clamp(48px,7vw,80px);padding-top:30px;border-top:1px solid var(--line-soft)}
.hero__badges img{height:44px;width:auto;opacity:.85}
.hero__badges .txt{font-family:var(--mono);font-size:.72rem;color:var(--grey-dim);letter-spacing:.05em;max-width:24ch;line-height:1.5}
.scrollhint{position:absolute;left:var(--pad);bottom:26px;z-index:1;font-family:var(--mono);font-size:.66rem;letter-spacing:.28em;color:var(--grey-dim);text-transform:uppercase;display:flex;align-items:center;gap:10px}
.scrollhint::after{content:"";width:44px;height:1px;background:var(--grey-dim);animation:pulse 2.4s var(--ease) infinite}
@keyframes pulse{0%,100%{transform:scaleX(.3);transform-origin:left;opacity:.4}50%{transform:scaleX(1);opacity:1}}
@media(max-width:760px){.scrollhint{display:none}.hero{min-height:auto;padding-top:132px}}

/* ---------- strip loghi ---------- */
.strip{border-block:1px solid var(--line-soft);background:var(--carbon);overflow:hidden}
.strip__in{display:flex;align-items:center;gap:clamp(34px,6vw,80px);padding-block:26px;flex-wrap:wrap;justify-content:center}
.strip img{height:20px;width:auto;opacity:.6;transition:opacity .3s}
.strip img.tall{height:34px}
.strip img:hover{opacity:1}
.strip .sep{width:1px;height:24px;background:var(--line);display:none}
@media(min-width:900px){.strip .sep{display:block}}
.strip span{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--grey-dim)}

/* ---------- griglia servizi ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);margin-top:56px}
.card{background:var(--nero);padding:38px 30px 34px;position:relative;transition:background .4s}
.card:hover{background:var(--carbon)}
.card img{height:46px;width:auto;margin-bottom:26px;opacity:.9}
.card h3{font-size:1.02rem;letter-spacing:.02em;margin-bottom:12px}
.card p{color:var(--grey);font-size:.95rem}
.card::after{content:"";position:absolute;left:0;bottom:-1px;width:0;height:2px;background:var(--volt);transition:width .5s var(--ease)}
.card:hover::after{width:100%}

/* ---------- sezione full-bleed immagine ---------- */
.showcase{position:relative;background:#000;border-block:1px solid var(--line-soft)}
.showcase img.full{width:100%;height:auto}
.split{display:grid;grid-template-columns:1fr;gap:clamp(28px,4vw,60px);align-items:start}
.split .h2{font-size:clamp(1.85rem,3.3vw,2.9rem)}
.split .lead{padding-top:6px}
@media(min-width:900px){.split{grid-template-columns:1fr 1fr}.split--wide{grid-template-columns:1.1fr .9fr}}

/* ---------- tabella kit ---------- */
.kits{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);margin-top:52px}
@media(min-width:560px){.kits{grid-template-columns:repeat(2,1fr)}}
@media(min-width:840px){.kits{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1120px){.kits{grid-template-columns:repeat(5,1fr)}}
.kit{background:var(--nero);padding:30px 26px;display:flex;flex-direction:column;gap:16px;transition:background .35s}
.kit:hover{background:var(--carbon)}
.kit__name{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:1.05rem;letter-spacing:.01em}
.kit__name small{display:block;font-weight:600;font-size:.66rem;letter-spacing:.26em;color:var(--grey-dim);margin-bottom:8px}
.kit ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.kit li{font-size:.88rem;color:var(--grey);display:flex;gap:10px;align-items:flex-start;line-height:1.45}
.kit li::before{content:"";width:5px;height:5px;margin-top:8px;border-radius:50%;background:var(--volt);flex:none}
.kit .code{margin-top:auto;padding-top:14px;border-top:1px solid var(--line-soft)}

/* ---------- service ---------- */
.service{display:grid;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);grid-template-columns:1fr;margin-top:54px}
@media(min-width:820px){.service{grid-template-columns:1fr 1fr}}
.service__box{background:var(--carbon);padding:clamp(30px,4vw,48px)}
.service__box img{height:36px;width:auto;margin-bottom:28px}
.service__box p{color:var(--grey);font-size:.97rem}
.service__box .tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--volt);display:block;margin-bottom:18px}

/* ---------- brevetti ---------- */
.figure{margin:0;border:1px solid var(--line-soft);background:#000;overflow:hidden}
.figure img{width:100%;transition:transform .8s var(--ease)}
.figure:hover img{transform:scale(1.02)}
.figure figcaption{padding:16px 22px;border-top:1px solid var(--line-soft);font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--grey-dim);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.figs{display:grid;gap:24px;margin-top:52px}
@media(min-width:900px){.figs{grid-template-columns:1fr 1fr}}

/* ---------- gamma prodotti ---------- */
.range{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);margin-top:52px}
@media(min-width:700px){.range{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1080px){.range{grid-template-columns:repeat(5,1fr)}}
.tile{background:var(--nero);aspect-ratio:1/1;display:flex;flex-direction:column;padding:20px;position:relative;transition:background .4s}
.tile:hover{background:var(--carbon-2)}
.tile__img{flex:1;display:flex;align-items:center;justify-content:center;padding:8px;min-height:0}
.tile__img img{max-height:100%;width:auto;object-fit:contain;transition:transform .6s var(--ease);filter:drop-shadow(0 12px 24px rgba(0,0,0,.6))}
/* foto già su fondo nero: il blend elimina il rettangolo scuro */
.tile__img img.blend{mix-blend-mode:screen;filter:none}
.tile:hover .tile__img img{transform:scale(1.07) translateY(-3px)}
.tile__label{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:.8rem;letter-spacing:.08em}
.tile__label span{display:block;font-family:var(--mono);font-weight:400;font-size:.66rem;letter-spacing:.06em;color:var(--grey-dim);text-transform:none;margin-top:4px}

/* ---------- download ---------- */
#download{background:var(--carbon);border-block:1px solid var(--line-soft);position:relative;overflow:hidden}
#download::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);background-size:24px 24px;opacity:.12;
  -webkit-mask-image:radial-gradient(80% 120% at 15% 50%,#000,transparent 70%);
  mask-image:radial-gradient(80% 120% at 15% 50%,#000,transparent 70%);
}
.dl{position:relative;display:grid;gap:clamp(38px,6vw,80px);align-items:center;grid-template-columns:1fr}
@media(min-width:880px){.dl{grid-template-columns:1.15fr .85fr}}
.dl h2{margin-bottom:22px}
.dl__meta{display:flex;flex-wrap:wrap;gap:26px;margin:32px 0 34px;padding-top:24px;border-top:1px solid var(--line)}
.dl__meta div{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;color:var(--grey-dim)}
.dl__meta b{display:block;font-family:var(--display);font-weight:700;font-size:.95rem;letter-spacing:.04em;color:#fff;margin-top:6px;text-transform:uppercase}
.dl__cover{justify-self:center;position:relative;perspective:1200px}
.dl__cover img{
  width:min(320px,74vw);border:1px solid var(--line);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.04);
  transform:rotateY(-13deg) rotateX(4deg);transition:transform .7s var(--ease);
}
.dl__cover:hover img{transform:rotateY(-5deg) rotateX(1deg) translateY(-6px)}
.dl__cover::after{
  content:"PDF";position:absolute;right:-14px;top:-14px;background:var(--volt);color:#04121e;
  font-family:var(--display);font-weight:800;font-size:.7rem;letter-spacing:.14em;padding:8px 12px;
}

/* ---------- contatti ---------- */
.contact{display:grid;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);margin-top:52px;grid-template-columns:1fr}
@media(min-width:820px){.contact{grid-template-columns:1fr 1fr}}
.contact__col{background:var(--nero);padding:clamp(28px,3.4vw,44px)}
.contact dl{margin:0;display:flex;flex-direction:column;gap:22px}
.contact dt{font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--grey-dim);margin-bottom:6px}
.contact dd{margin:0;font-size:1.02rem}
.contact dd a:hover{color:var(--volt)}
.mails{display:grid;gap:1px;background:var(--line-soft);margin-top:34px;border-top:1px solid var(--line-soft)}
.mail{background:var(--nero);padding:16px 0 16px 0;display:flex;justify-content:space-between;gap:16px;align-items:baseline;flex-wrap:wrap;border-bottom:1px solid var(--line-soft)}
.mail span{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--grey-dim)}
.mail a{font-size:.98rem;transition:color .25s}
.mail a:hover{color:var(--volt)}
.map{background:var(--carbon);min-height:360px;height:100%;position:relative;border:0;overflow:hidden}
.map iframe{width:100%;height:100%;min-height:360px;border:0;display:block}

/* ---------- footer ---------- */
.ftr{border-top:1px solid var(--line-soft);padding-block:46px;background:var(--nero)}
.ftr__in{display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
.ftr img{height:40px;width:auto;opacity:.9}
.ftr p{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;color:var(--grey-dim)}
.ftr .up{font-family:var(--display);font-weight:600;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--grey);display:inline-flex;gap:10px;align-items:center}
.ftr .up:hover{color:#fff}

/* ---------- barra download mobile ---------- */
.dockbar{
  position:fixed;left:0;right:0;bottom:0;z-index:55;display:none;
  padding:12px var(--pad) calc(12px + env(safe-area-inset-bottom));
  background:rgba(11,11,12,.92);backdrop-filter:blur(12px);border-top:1px solid var(--line);
  transform:translateY(120%);transition:transform .45s var(--ease);
}
.dockbar.is-on{transform:none}
.dockbar .btn{width:100%;justify-content:center}
@media(max-width:760px){.dockbar{display:block}.ftr{padding-bottom:calc(96px + env(safe-area-inset-bottom))}}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  .rv{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---------- classi di utilità e varianti ---------- */
.section--alt{background:var(--carbon);border-block:1px solid var(--line-soft)}
.mb-l{margin-bottom:26px}
.mb-m{margin-bottom:22px}
.mt-m{margin-top:22px}
.leader--foot{margin-top:34px}
.leader-list .leader{padding-block:18px;border-bottom:1px solid var(--line-soft)}
.leader-list .leader:last-child{border-bottom:0}
.mail--last{border-bottom:0}

/* ---------- rimando al modulo di contatto esterno ---------- */
.formlink{margin-top:34px;padding-top:28px;border-top:1px solid var(--line)}
.formlink__note{color:var(--grey);font-size:.92rem;margin-bottom:20px;max-width:46ch}
.formlink__note strong{color:#fff;font-weight:600}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}


/* ---------- refinements 03/2026 ---------- */
@media(max-width:520px){
  .hdr__in{height:70px;gap:10px}
  .nav{inset:70px 0 auto}
  .hdr__logo img{height:42px}
  .hdr .btn{padding:11px 12px}
  .burger{width:40px;height:40px}
  .contact__col{padding-inline:22px}
  .mail{align-items:flex-start}
  .mail span,.mail a{width:100%}
  .mail a{font-size:1rem;overflow-wrap:anywhere}
  .ftr__in{align-items:flex-start}
  .ftr img{height:58px}
}