/* ARCH HOME V5.0 - stile della vetrina e dell'area privata. Struttura ripresa da ARCH AI SYSTEMS (sidebar, hero, pannello agente, card)
   e dal mockup HOME approvato. Sfondo e finitura della A dipendono dal grado (MASTER 11.2: proposte da validare). */
:root{--bg:#050506;--panel:#0d0d10;--panel2:#16161b;--line:#3a3222;--txt:#f4f1ea;--mut:#d9d4c8;--acc:#f5b82e;--acc2:#ffd25e;--ok:#25c26e;--warn:#f0b43c;--err:#ef5350}
*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--txt);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;transition:background .4s}
a{color:var(--acc2)}button,input,select,textarea{font:inherit}
.top{display:flex;align-items:center;gap:22px;padding:10px 22px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.25);position:sticky;top:0;z-index:5;backdrop-filter:blur(6px)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--txt)}.brand img{width:64px;height:auto;border-radius:6px}
.brand b{display:block;font-size:22px;letter-spacing:.18em;font-weight:700}.brand small{display:block;font-size:10px;letter-spacing:.3em;color:var(--mut)}
.top nav{display:flex;gap:18px;flex:1;justify-content:center;flex-wrap:wrap}.top nav a{color:var(--txt);text-decoration:none;font-size:14px;padding:6px 2px;border-bottom:2px solid transparent}.top nav a.on,.top nav a:hover{border-color:var(--acc)}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:8px;padding:10px 16px;border:1px solid var(--line);background:transparent;color:var(--txt);text-decoration:none;cursor:pointer}
.btn.pri{background:linear-gradient(180deg,#ffd45c,#f2ae1f);border-color:transparent;color:#140c00;font-weight:700}.btn.ok{background:var(--ok);border-color:transparent;color:#fff}
.lay{display:grid;grid-template-columns:200px 1fr 360px;gap:0;min-height:calc(100vh - 70px)}
.side{border-right:1px solid var(--line);padding:16px 0}.side a{display:block;padding:11px 22px;color:var(--txt);text-decoration:none}.side a.on{background:linear-gradient(90deg,rgba(245,184,46,.35),transparent);border-left:3px solid var(--acc)}
main{padding:26px 30px;min-width:0}
.eyebrow{letter-spacing:.25em;font-size:12px;color:var(--acc2);text-transform:uppercase}
h1.hero{font-size:clamp(30px,4.4vw,54px);line-height:1.05;margin:.3em 0}h1.hero em{font-style:normal;color:var(--acc2)}
.hero-wrap{border-radius:14px;padding:26px;background:radial-gradient(circle at 80% 20%,rgba(245,184,46,.18),transparent 55%),linear-gradient(160deg,var(--panel),transparent);border:1px solid var(--line)}
.presenter{display:flex;gap:16px;align-items:center;flex-wrap:wrap;border:1px solid var(--line);border-radius:12px;padding:14px;margin:18px 0;background:rgba(0,0,0,.25)}
.presenter .ph{width:72px;height:72px;border-radius:50%;background:var(--panel2) center/cover;display:grid;place-items:center;font-size:28px;color:var(--mut)}
.presenter .who small{color:var(--mut);display:block}.presenter .who strong{font-size:20px}.presenter .code{font-family:ui-monospace,Consolas,monospace;background:var(--panel2);padding:3px 8px;border-radius:6px;cursor:copy}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:22px}
.card{border:1px solid var(--line);border-radius:12px;padding:16px;background:linear-gradient(160deg,var(--panel),var(--panel2));min-height:110px}.card i{font-style:normal;font-size:24px}.card strong{display:block;margin:6px 0 2px}.card small{color:var(--mut)}
.banner{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:space-between;margin-top:22px;border:1px solid var(--line);border-radius:12px;padding:18px 22px;background:rgba(245,184,46,.06)}
.banner h2{margin:0}.banner h2 span{color:var(--acc2)}
.agent{border-left:1px solid var(--line);padding:16px;display:flex;flex-direction:column;gap:10px}
.agent .head{display:flex;gap:12px;align-items:center}.agent .head img{width:52px;border-radius:6px}.agent .msgs{flex:1;overflow:auto;max-height:46vh;display:flex;flex-direction:column;gap:8px}
.bubble{background:var(--panel2);border-radius:10px;padding:10px 12px;font-size:14px}.bubble.me{background:rgba(245,184,46,.25);align-self:flex-end}
.qa{display:flex;flex-direction:column;gap:6px}.qa button{text-align:left;border:1px solid var(--line);background:var(--panel);color:var(--txt);border-radius:8px;padding:9px 12px;cursor:pointer}.qa button.net{border-color:var(--acc);}
.agent form{display:flex;gap:6px}.agent input{flex:1;background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:9px}
footer{border-top:1px solid var(--line);padding:16px 22px;color:var(--mut);font-size:13px;display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
.note{font-size:12px;color:var(--mut)}.tag{display:inline-block;font-size:11px;padding:2px 7px;border-radius:20px;border:1px solid var(--line);color:var(--mut)}
table{width:100%;border-collapse:collapse;font-size:14px}th,td{border-bottom:1px solid var(--line);padding:7px 8px;text-align:left;vertical-align:top}th{color:var(--mut);font-weight:600}
.panel{border:1px solid var(--line);border-radius:12px;padding:18px;background:var(--panel);margin:14px 0;overflow-x:auto}
input,select,textarea{background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:8px}label{display:block;margin:8px 0 3px;color:var(--mut);font-size:13px}
.err{color:var(--err)}.okc{color:var(--ok)}
/* Finitura della A ORIGINALE per grado: solo filtri sul file originale, geometria invariata. Valori = proposta da validare. */
.a-argento{filter:grayscale(1) brightness(1.15)}.a-verde{filter:hue-rotate(-75deg) saturate(1.2)}.a-turchese{filter:hue-rotate(-25deg)}.a-viola{filter:hue-rotate(40deg)}
.a-porpora{filter:hue-rotate(80deg) saturate(1.3)}.a-rubino{filter:hue-rotate(140deg) saturate(1.6)}.a-oro-satinato{filter:sepia(1) saturate(1.6) hue-rotate(-12deg) brightness(.95)}
.a-oro-scintillante{filter:sepia(1) saturate(2.6) hue-rotate(-10deg) brightness(1.15);animation:luce 3s ease-in-out infinite}@keyframes luce{50%{filter:sepia(1) saturate(3) hue-rotate(-10deg) brightness(1.45) drop-shadow(0 0 8px #ffe29a)}}
@media (prefers-reduced-motion:reduce){.a-oro-scintillante{animation:none}}
@media (max-width:1100px){.lay{grid-template-columns:1fr}.side{display:none}.agent{border-left:0;border-top:1px solid var(--line)}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.top{flex-wrap:wrap;padding:10px 16px}.top nav{display:none}main{padding:18px 16px}.cards{grid-template-columns:1fr}}