/* =========================================================
   STA — Soluzioni Tecnologiche Avanzate
   Foglio di stile principale
   ========================================================= */

:root{
  --navy-900:#07111f;
  --navy-800:#0d1c31;
  --navy-700:#122a4b;
  --navy-600:#1A3C6E;
  --navy-400:#2f6bb5;
  --navy-200:#8fb4e0;

  --copper-700:#8a5526;
  --copper-600:#B87333;
  --copper-400:#d9924a;
  --copper-200:#f0c79b;

  --ink:#101a26;
  --ink-soft:#4d6070;
  --line:#e2e8f0;
  --line-dk:rgba(255,255,255,.12);
  --paper:#ffffff;
  --paper-soft:#f5f8fc;

  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --maxw:1200px;
  --nav-h:74px;

  --shadow-sm:0 1px 2px rgba(16,26,38,.05),0 4px 14px rgba(16,26,38,.05);
  --shadow-md:0 12px 34px rgba(16,26,38,.10);
  --shadow-lg:0 28px 70px rgba(7,17,31,.28);

  --ease:cubic-bezier(.22,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  margin:0;
  font-family:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;line-height:1.62;color:var(--ink);background:var(--paper);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--navy-600);text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.14;letter-spacing:-.025em;font-weight:750}
p{margin:0 0 1rem}
p:last-child{margin-bottom:0}
table{border-collapse:collapse;width:100%}

/* ---- switch lingua: una sola variante visibile ---- */
html[lang="it"] [data-l="en"],
html[lang="en"] [data-l="it"]{display:none !important}

/* ---------------------------------------------------- layout */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(20px,4vw,40px)}
.section{position:relative;padding-block:clamp(72px,10vw,132px);overflow:hidden;isolation:isolate}
.section > .wrap{position:relative;z-index:2}

/* strato di sfondo tematico */
.bg{
  position:absolute;inset:0;z-index:0;
  background-position:center;background-size:cover;background-repeat:no-repeat;
}
.bg::after{content:"";position:absolute;inset:0}
.bg-light::after{background:linear-gradient(180deg,rgba(255,255,255,.93),rgba(244,247,251,.90) 45%,rgba(255,255,255,.95))}
.bg-dark::after{background:linear-gradient(180deg,rgba(7,17,31,.90),rgba(10,26,48,.86) 50%,rgba(7,17,31,.93))}
.bg-cu::after{background:linear-gradient(180deg,rgba(38,24,14,.78),rgba(52,33,19,.66) 45%,rgba(32,20,12,.84))}
.bg-hero::after{background:linear-gradient(110deg,rgba(7,17,31,.86),rgba(10,26,48,.66) 55%,rgba(15,37,69,.72))}

/* --- modalita' fotografica ---------------------------------------------
   Attivata da PHP quando la sezione ha una fotografia di sfondo.
   Un solo velo in multiply: la tinta uniforma la foto alla palette e
   l'opacita' e' calcolata sui pixel reali per garantire 4,6:1 col testo
   bianco anche nel punto piu' chiaro dell'immagine. */
.bg.has-photo::before{
  content:"";position:absolute;inset:0;z-index:1;mix-blend-mode:multiply;
}
.bg-hero.has-photo::before {background:rgb(18,41,74); opacity:.62}
.bg-dark.has-photo::before {background:rgb(14,30,54); opacity:.54}
.bg-cu.has-photo::before   {background:rgb(38,26,16); opacity:.52}
.bg-light.has-photo::before{background:rgb(233,239,247);mix-blend-mode:screen;opacity:.86}

/* con la foto il velo a gradiente non serve: resta solo una vignettatura
   morbida che tiene lo sguardo al centro e stacca i bordi */
.bg.has-photo::after{
  background:none;z-index:2;
  box-shadow:inset 0 0 260px 80px rgba(0,0,0,.32);
}

/* ---------------------------------------------------- header */
.hdr{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.hdr .nav{display:flex;align-items:center;gap:clamp(14px,2.2vw,30px);height:var(--nav-h)}
.brand{display:flex;flex-direction:column;line-height:1.12;margin-right:auto;min-width:0}
.brand b{font-size:.98rem;font-weight:750;color:var(--navy-600);letter-spacing:-.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand span{font-size:.63rem;letter-spacing:.2em;text-transform:uppercase;color:var(--copper-600);font-weight:600}
.navlink{
  font-size:.9rem;font-weight:550;color:var(--ink-soft);position:relative;padding-block:6px;
  transition:color .2s var(--ease);white-space:nowrap;
}
.navlink::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--copper-600);border-radius:2px;transition:right .28s var(--ease);
}
.navlink:hover{color:var(--navy-600)}
.navlink:hover::after,.navlink.active::after{right:0}
.navlink.active{color:var(--navy-600)}

.lang{display:flex;border:1px solid var(--line);border-radius:99px;overflow:hidden;background:#fff}
.lang a{
  padding:6px 13px;font-size:.75rem;font-weight:750;letter-spacing:.06em;
  color:var(--ink-soft);transition:.2s var(--ease);
}
.lang a[aria-current="true"]{background:var(--navy-600);color:#fff}

.burger{
  display:none;width:40px;height:40px;border:1px solid var(--line);background:#fff;
  border-radius:var(--r-sm);cursor:pointer;padding:0;position:relative;
}
.burger span{
  position:absolute;left:11px;right:11px;height:2px;background:var(--navy-600);border-radius:2px;
  transition:.25s var(--ease);
}
.burger span:nth-child(1){top:14px}
.burger span:nth-child(2){top:19px}
.burger span:nth-child(3){top:24px}
.burger[aria-expanded="true"] span:nth-child(1){top:19px;transform:rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){top:19px;transform:rotate(-45deg)}

.progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:linear-gradient(90deg,var(--navy-600),var(--copper-600));transition:width .1s linear}

/* ---------------------------------------------------- hero */
.hero{
  position:relative;isolation:isolate;color:#fff;overflow:hidden;
  padding-block:clamp(90px,13vw,168px);
}
.hero .wrap{position:relative;z-index:2}
.hero h1{max-width:17ch;margin-bottom:1.2rem;background:linear-gradient(180deg,#fff,#c9dcf2);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{color:#bed3ea;max-width:60ch}
.hero .eyebrow{color:#f0c79b}

.stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(18px,3vw,40px);
  margin-top:clamp(40px,6vw,64px);padding-top:clamp(26px,4vw,38px);
  border-top:1px solid rgba(255,255,255,.16);
}
.stats b{display:block;font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;color:#fff;letter-spacing:-.03em}
.stats span{font-size:.85rem;color:#9fbadb}

/* ---------------------------------------------------- pulsanti */
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(26px,4vw,36px)}
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:13px 26px;border-radius:99px;font-weight:650;font-size:.95rem;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:focus-visible{outline:3px solid var(--copper-400);outline-offset:3px}
.btn-cu{background:var(--copper-600);color:#fff;box-shadow:0 10px 26px rgba(184,115,51,.34)}
.btn-cu:hover{background:var(--copper-400)}
.btn-navy{background:var(--navy-600);color:#fff;box-shadow:0 10px 26px rgba(26,60,110,.26)}
.btn-navy:hover{background:var(--navy-700)}
.btn-out{border-color:var(--navy-600);color:var(--navy-600)}
.btn-out:hover{background:var(--navy-600);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.42);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.7)}
.btn .arw{transition:transform .2s var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* ---------------------------------------------------- griglie e card */
.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.split{display:grid;grid-template-columns:1.25fr .95fr;gap:clamp(30px,5vw,64px);align-items:start}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
  padding:clamp(20px,2.4vw,28px);box-shadow:var(--shadow-sm);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--navy-200)}
.card p{color:var(--ink-soft);font-size:.94rem}
.card h3{margin-bottom:.45rem;color:var(--navy-600)}

.section-dark .card{
  background:rgba(255,255,255,.055);border-color:var(--line-dk);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:none;
}
.section-dark .card:hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.28);box-shadow:var(--shadow-lg)}
.section-dark .card p{color:#adc4de}

.ic{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:1rem;
  background:linear-gradient(140deg,rgba(26,60,110,.10),rgba(184,115,51,.12));
  border:1px solid var(--line);color:var(--navy-600);
}
.ic svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.section-dark .ic{background:rgba(255,255,255,.08);border-color:var(--line-dk);color:var(--copper-400)}

/* ---------------------------------------------------- timeline */
.tl{position:relative;padding-left:30px;margin:0}
.tl::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--copper-600),var(--navy-200),transparent);border-radius:2px}
.tl li{position:relative;padding-bottom:26px}
.tl li:last-child{padding-bottom:0}
.tl li::before{
  content:"";position:absolute;left:-30px;top:7px;width:12px;height:12px;border-radius:50%;
  background:var(--copper-600);box-shadow:0 0 0 4px rgba(184,115,51,.16);
}
.tl b{display:block;font-size:.76rem;letter-spacing:.13em;text-transform:uppercase;color:var(--navy-600);font-weight:750}
.tl p{margin:.3rem 0 0;font-size:.94rem;color:var(--ink-soft)}

/* ---------------------------------------------------- divisioni */
.divs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.2vw,24px);margin-top:clamp(40px,6vw,60px)}
.div-card{
  position:relative;overflow:hidden;border-radius:var(--r-lg);padding:clamp(24px,2.8vw,34px);
  color:#fff;min-height:280px;display:flex;flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.div-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.div-card h3{font-size:1.3rem;color:#fff;margin-bottom:.5rem}
.div-card p{color:rgba(255,255,255,.85);font-size:.95rem;flex:1}
.div-card .go{font-weight:700;font-size:.9rem;display:inline-flex;align-items:center;gap:.4rem;color:#fff}
.div-card .go::after{content:"→";transition:transform .2s var(--ease)}
.div-card:hover .go::after{transform:translateX(4px)}
.div-card .num{position:absolute;right:20px;top:8px;font-size:5rem;font-weight:850;color:rgba(255,255,255,.10);line-height:1;letter-spacing:-.04em}
.dv1{background:linear-gradient(150deg,#1A3C6E,#2f6bb5)}
.dv2{background:linear-gradient(150deg,#07111f,#1A3C6E)}
.dv3{background:linear-gradient(150deg,#8a5526,#d9924a)}

/* ---------------------------------------------------- badge */
.badge{
  display:inline-flex;align-items:center;gap:.55rem;margin-bottom:1rem;
  background:rgba(76,214,140,.13);border:1px solid rgba(76,214,140,.34);
  color:#7ff0b4;border-radius:99px;padding:6px 15px;font-size:.8rem;font-weight:650;
}
.badge i{width:8px;height:8px;border-radius:50%;background:#4cd68c;animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(76,214,140,.55)}50%{box-shadow:0 0 0 7px rgba(76,214,140,0)}}

/* ---------------------------------------------------- partner */
.partner{display:grid;grid-template-columns:1.1fr .95fr;gap:clamp(28px,4vw,56px);align-items:center;margin-top:clamp(34px,5vw,52px)}
.panel{background:rgba(255,255,255,.05);border:1px solid var(--line-dk);border-radius:var(--r-lg);padding:clamp(24px,3vw,34px);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.panel h3{margin-bottom:1rem}
.panel li{position:relative;padding:.8rem 0 .8rem 1.7rem;border-bottom:1px solid var(--line-dk);font-size:.93rem;color:#c8d8ea}
.panel li:last-child{border-bottom:0}
.panel li::before{content:"";position:absolute;left:0;top:1.45rem;width:9px;height:9px;border-radius:50%;background:var(--copper-400)}

/* ---------------------------------------------------- schede cavi */
.cables{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.2vw,24px);margin-top:clamp(26px,4vw,38px)}
.cable{
  border:1px solid var(--line-dk);border-radius:var(--r-md);overflow:hidden;
  background:rgba(255,255,255,.045);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.cable:hover{transform:translateY(-5px);border-color:rgba(217,146,74,.55);box-shadow:var(--shadow-lg)}
.cable .fig{
  padding:20px;display:grid;place-items:center;border-bottom:1px solid var(--line-dk);
  background:radial-gradient(circle at 50% 45%,rgba(217,146,74,.16),transparent 68%);
}
.cable .fig svg{width:150px;height:auto}
.cable .bd{padding:20px 22px 24px}
.cable h4{font-size:1rem;color:#fff;margin-bottom:.15rem}
.cable .sub{font-size:.78rem;color:#9fb6d0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.cable .mat{
  display:inline-block;margin:.7rem 0 .9rem;padding:4px 11px;border-radius:6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.76rem;font-weight:700;
  background:linear-gradient(135deg,var(--copper-700),var(--copper-600));color:#fff;letter-spacing:.04em;
}
.cable dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0;font-size:.84rem}
.cable dt{color:#93aac4;margin:0}
.cable dd{margin:0;text-align:right;font-weight:650;color:#e9f1fa}

/* ---------------------------------------------------- tabella */
.tablewrap{margin-top:clamp(22px,3vw,32px);border:1px solid var(--line-dk);border-radius:var(--r-md);overflow:auto;background:rgba(255,255,255,.04)}
.tablewrap table{min-width:640px;font-size:.9rem}
.tablewrap th,.tablewrap td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line-dk);white-space:nowrap}
.tablewrap thead th{
  position:sticky;top:0;background:#12253f;color:#fff;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;font-weight:750;z-index:1;
}
.tablewrap tbody tr{transition:background .18s var(--ease)}
.tablewrap tbody tr:hover{background:rgba(255,255,255,.055)}
.tablewrap tbody td{color:#cbdbec}
.tablewrap tbody td:first-child{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:750;color:var(--copper-400)}

/* ---------------------------------------------------- note */
.note{
  margin-top:clamp(22px,3vw,30px);padding:20px 24px;border-radius:var(--r-md);
  border:1px solid rgba(217,146,74,.30);border-left:3px solid var(--copper-400);
  background:rgba(184,115,51,.10);font-size:.92rem;color:#f0d9be;
}
.note p + p{margin-top:.7rem}

/* ---------------------------------------------------- contatti */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,56px);margin-top:clamp(26px,4vw,38px)}
.contact address{font-style:normal;color:var(--ink-soft);line-height:1.85}
.contact .big{font-size:1.05rem;color:var(--ink);font-weight:700}
.contact a{font-weight:600}
.contact a:hover{color:var(--copper-600)}
.chan{display:flex;align-items:center;gap:.7rem;padding:.7rem 0;border-bottom:1px solid var(--line);font-size:.94rem}
.chan:last-child{border-bottom:0}
.chan .ic{width:34px;height:34px;margin:0;border-radius:9px;flex:none}
.chan .ic svg{width:17px;height:17px}
.chan b{display:block;font-size:.8rem;color:var(--ink-soft);font-weight:600}

/* ---------------------------------------------------- footer */
.ftr{background:var(--navy-900);color:#8ba3c2;padding-block:clamp(46px,6vw,66px) 28px;font-size:.9rem}
.ftr h4{color:#fff;font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:1rem}
.ftr a{color:#8ba3c2;transition:color .2s var(--ease)}
.ftr a:hover{color:#fff}
.fgrid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:clamp(24px,3.4vw,44px);padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.09)}
.fgrid li{padding:5px 0}
.fbot{padding-top:22px;font-size:.8rem;color:#607893}

/* ---------------------------------------------------- animazioni */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv-d1{transition-delay:.06s}.rv-d2{transition-delay:.12s}.rv-d3{transition-delay:.18s}
.rv-d4{transition-delay:.24s}.rv-d5{transition-delay:.3s}.rv-d6{transition-delay:.36s}
.rv-d7{transition-delay:.42s}.rv-d8{transition-delay:.48s}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

/* ---------------------------------------------------- utility
   Classi al posto degli attributi style="": la CSP vieta lo stile inline. */
.mt-lg{margin-top:2.2rem}
.mt-xl{margin-top:clamp(2rem,3.4vw,2.8rem)}
.mt-2xl{margin-top:clamp(2.6rem,5vw,3.6rem)}
.mt-sm{margin-top:.7rem}
.mb-md{margin-bottom:1rem}
.h-sub{font-size:clamp(1.2rem,2vw,1.45rem)}

.skip{position:absolute;left:-9999px;top:0;background:var(--navy-600);color:#fff;padding:10px 18px;border-radius:0 0 var(--r-sm) 0;z-index:200}
.skip:focus{left:0}

/* ---------------------------------------------------- responsive */
@media (max-width:1080px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cables{grid-template-columns:repeat(2,minmax(0,1fr))}
  .divs{grid-template-columns:1fr}
  .split,.partner,.contact{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  body{font-size:16px}
  .g2,.g3,.g4,.cables{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .burger{display:block}
  .navlink{display:none}
  .hdr .nav.open{height:auto;flex-wrap:wrap;padding-bottom:14px}
  .hdr .nav.open .navlink{display:block;width:100%;padding:11px 0;border-top:1px solid var(--line)}
  .fgrid{grid-template-columns:1fr}
  .cable dl{grid-template-columns:1fr auto}
}