:root{
  --bg:#080c14;--panel:#0e1522;--ink:#e6edf7;--mute:#8d9ab0;--line:rgba(160,185,230,.14);
  --amb:#ffb347;--cy:#5ad1ff;--ok:#6ee7a8;
  --pad:clamp(20px,5vw,72px);--r:20px;--ease:cubic-bezier(.16,1,.3,1);
  --d:'Space Grotesk',system-ui,sans-serif;--m:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--bg);color-scheme:dark;scroll-behavior:smooth;scroll-padding-top:80px}
body{font:400 clamp(16px,1.12vw,18px)/1.65 var(--d);color:var(--ink);background:var(--bg);overflow-x:clip;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--amb);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;background:var(--amb);color:#1a1100;padding:10px 16px;border-radius:10px;z-index:100;font-weight:700}
.skip:focus{top:12px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.nav{position:fixed;inset:0 0 auto;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px var(--pad);border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.nav.stuck{background:rgba(8,12,20,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:var(--line)}
.logo{font:700 1.1rem var(--d);letter-spacing:-.02em;display:flex;gap:10px;align-items:center}
.caret-logo{font:500 .95rem var(--m);color:var(--amb)}
.nav nav{display:flex;gap:6px}
.nav nav a{padding:8px 14px;border-radius:99px;color:var(--mute);font-size:.95rem;transition:color .25s,background .25s}
.nav nav a:hover{color:var(--ink);background:rgba(255,255,255,.06)}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 28px;border-radius:14px;background:var(--amb);color:#1a1100;font-weight:700;border:1px solid transparent;transition:background .25s,box-shadow .3s,transform .25s var(--ease),border-color .25s}
.btn:hover{background:#ffc46e;box-shadow:0 12px 40px -10px rgba(255,179,71,.6);transform:translateY(-2px)}
.btn:active{transform:translateY(0);filter:brightness(.94)}
.btn.ghost{background:transparent;color:var(--ink);border-color:rgba(255,255,255,.22)}
.btn.ghost:hover{background:rgba(255,255,255,.07);box-shadow:none;border-color:rgba(255,255,255,.4)}
.btn-sm{min-height:42px;padding:0 20px;font-size:.92rem;border-radius:12px}

/* hero */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden}
#net{position:absolute;inset:0;width:100%;height:100%}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 80% 70% at 30% 50%,transparent 30%,var(--bg) 100%)}
.hero-in{position:relative;z-index:1;padding:130px var(--pad) 90px;max-width:1200px}
.status{display:inline-flex;align-items:center;gap:10px;font:400 .85rem var(--m);color:var(--mute);margin-bottom:26px}
.led{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok);animation:blink 2.4s infinite}
@keyframes blink{50%{opacity:.35}}
h1{font:700 clamp(2.6rem,7.2vw,6.8rem)/1 var(--d);letter-spacing:-.045em}
h1>span{display:block}
.l2{color:var(--amb);min-height:1em;white-space:nowrap}
.caret{display:inline-block;width:.07em;height:.82em;margin-left:.06em;background:var(--cy);vertical-align:-.05em;animation:caret 1s steps(1) infinite}
@keyframes caret{50%{opacity:0}}
.lead{max-width:58ch;margin-top:30px;color:var(--mute);font-size:clamp(1.05rem,1.45vw,1.25rem)}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}

.sec{padding:clamp(80px,12vw,160px) var(--pad) 0}
.head{display:grid;grid-template-columns:1fr 1fr;gap:20px 64px;align-items:end;margin-bottom:clamp(34px,5vw,60px)}
h2{font:700 clamp(2rem,4.6vw,4.2rem)/1.02 var(--d);letter-spacing:-.04em}
.head p{color:var(--mute);justify-self:end;max-width:44ch}

/* demo chatbot */
.demo{display:grid;grid-template-columns:1fr minmax(0,520px);gap:clamp(32px,6vw,96px);align-items:center}
.demo-copy p{color:var(--mute);margin-top:22px;max-width:50ch}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.chips button{font:500 .92rem var(--d);color:var(--ink);background:rgba(255,255,255,.04);border:1px solid var(--line);padding:11px 18px;border-radius:99px;cursor:pointer;transition:background .25s,border-color .25s,transform .25s var(--ease)}
.chips button:hover{background:rgba(90,209,255,.12);border-color:rgba(90,209,255,.5);transform:translateY(-2px)}
.chips button:active{transform:translateY(0)}
.chips button:disabled{opacity:.5;cursor:wait;transform:none}
.note{font:400 .82rem var(--m)!important;color:var(--mute);margin-top:22px!important}
.chat{border:1px solid var(--line);border-radius:26px;background:linear-gradient(170deg,#101a2b,var(--panel));box-shadow:0 40px 100px -40px rgba(90,209,255,.25);overflow:hidden}
.chat-head{display:flex;align-items:center;gap:14px;padding:18px 22px;border-bottom:1px solid var(--line)}
.av{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--amb),#ff7e5f);color:#1a1100;font-weight:700}
.chat-head b{display:block;font-size:.98rem;line-height:1.2}
.chat-head small{display:flex;align-items:center;gap:7px;color:var(--mute);font-size:.8rem}
.chat-log{height:clamp(340px,44vh,420px);overflow-y:auto;padding:22px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth}
.msg{max-width:84%;padding:12px 16px;border-radius:18px;font-size:.96rem;line-height:1.5;animation:pop .45s var(--ease)}
.msg.bot{align-self:flex-start;background:rgba(255,255,255,.06);border-bottom-left-radius:6px}
.msg.me{align-self:flex-end;background:var(--cy);color:#04141c;font-weight:500;border-bottom-right-radius:6px}
.msg.typing{display:flex;gap:5px;align-items:center;padding:16px 18px}
.msg.typing i{width:7px;height:7px;border-radius:50%;background:var(--mute);animation:dot 1s infinite}
.msg.typing i:nth-child(2){animation-delay:.15s}.msg.typing i:nth-child(3){animation-delay:.3s}
@keyframes dot{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}}

/* card */
.cards{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.card{grid-column:span 2;position:relative;padding:clamp(24px,2.6vw,34px);border:1px solid var(--line);border-radius:var(--r);background:var(--panel);overflow:hidden;display:flex;flex-direction:column;transition:transform .5s var(--ease),border-color .3s}
.card.wide{grid-column:span 3}
.card::before{content:"";position:absolute;inset:0;background:radial-gradient(380px circle at var(--x,50%) var(--y,0%),rgba(255,179,71,.14),transparent 45%);opacity:0;transition:opacity .35s;pointer-events:none}
.card:hover{transform:translateY(-3px);border-color:rgba(255,179,71,.4)}
.card:hover::before{opacity:1}
.card code{font:500 .85rem var(--m);color:var(--cy);margin-bottom:clamp(30px,4vw,54px)}
.card h3{font:700 clamp(1.5rem,2.2vw,2rem)/1.1 var(--d);letter-spacing:-.03em;margin-bottom:12px}
.card p{color:var(--mute)}
.card ul{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:24px}
.card li{padding:6px 12px;border:1px solid var(--line);border-radius:8px;font:400 .8rem var(--m);color:var(--ink)}

/* terminale */
.term{border:1px solid var(--line);border-radius:18px;background:#060a11;overflow:hidden;box-shadow:0 40px 100px -50px rgba(255,179,71,.25)}
.term-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.025)}
.term-bar i{width:11px;height:11px;border-radius:50%;background:#2a3446}
.term-bar span{margin-left:10px;font:400 .8rem var(--m);color:var(--mute)}
.term pre{font:400 clamp(.78rem,1.35vw,1.02rem)/2 var(--m);padding:clamp(20px,3vw,40px);white-space:pre-wrap;color:var(--ink)}
.term .cmd{color:var(--amb)}
.term b{color:var(--ok);font-weight:500}
.term .end{color:var(--cy)}
.ln{display:block}

.cta{text-align:center;padding-bottom:clamp(80px,12vw,160px)}
.cta h2{font-size:clamp(2.2rem,6vw,5.6rem);max-width:14ch;margin:0 auto}
.cta .lead{margin:24px auto 0}
.mail{display:inline-block;margin-top:40px;font:700 clamp(1.3rem,4vw,3.2rem)/1.1 var(--d);letter-spacing:-.035em;padding:18px 34px;border-radius:18px;border:1px solid rgba(255,255,255,.2);transition:background .3s,color .3s,border-color .3s,transform .3s var(--ease),box-shadow .4s;overflow-wrap:anywhere}
.mail:hover{background:var(--amb);color:#1a1100;border-color:var(--amb);transform:translateY(-3px);box-shadow:0 24px 80px -16px rgba(255,179,71,.55)}
.foot{display:flex;justify-content:space-between;gap:16px;padding:28px var(--pad);border-top:1px solid var(--line);color:var(--mute);font-size:.92rem}
.foot a:hover{color:var(--ink)}

.js [data-r]{visibility:hidden}
.js .term .ln{visibility:hidden}

@media (max-width:980px){
  .head{grid-template-columns:1fr}.head p{justify-self:start}
  .demo{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr 1fr}
  .card,.card.wide{grid-column:span 1}
  .card.wide:last-child{grid-column:span 2}
}
@media (max-width:720px){
  .nav nav{display:none}
  .cards{grid-template-columns:1fr}
  .card.wide:last-child{grid-column:span 1}
  .actions .btn{flex:1 1 100%}
  .foot{flex-direction:column}
  .l2{white-space:normal}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .led,.caret,.msg,.msg.typing i{animation:none}
  .card,.btn,.chips button,.mail{transition:none}
}

/* area riservata */
.nav-actions{display:flex;align-items:center;gap:10px}
.area svg{width:16px;height:16px;margin-right:8px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.foot-links{display:flex;gap:24px}
@media (max-width:720px){
  .nav-actions .scrivimi{display:none}
  .foot-links{justify-content:space-between}
}