:root{--sfondo: #0f1419;--card: #171d24;--bordo: #2a333d;--testo: #e6e9ec;--tenue: #9aa5b1;--accento: #d6a756;--ok: #4caf7d;--errore: #e06c6c;--parziale: #e0b35c;--radius: 14px;color-scheme:dark}@media(prefers-color-scheme:light){:root{--sfondo: #f6f4ef;--card: #ffffff;--bordo: #dcd7cc;--testo: #1d2229;--tenue: #5b6673;--accento: #a9772a;color-scheme:light}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--sfondo);color:var(--testo);font:17px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-tap-highlight-color:transparent}.app{display:flex;flex-direction:column;min-height:100%}.contenuto{flex:1;padding:calc(16px + var(--safe-area-inset-top, env(safe-area-inset-top, 0px))) 16px calc(84px + var(--safe-area-inset-bottom, env(safe-area-inset-bottom, 0px)));max-width:760px;width:100%;margin:0 auto}.centro{display:grid;place-items:center;height:100%;color:var(--tenue)}h1{font-size:1.5rem;margin:8px 0 12px}h2{font-size:1.15rem;margin:18px 0 8px}h3{font-size:1rem;margin:12px 0 6px;color:var(--tenue);font-weight:600;text-transform:uppercase;letter-spacing:.04em}p{margin:6px 0}small,.tenue{color:var(--tenue)}.card{background:var(--card);border:1px solid var(--bordo);border-radius:var(--radius);padding:14px 16px;margin:10px 0}.riga{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.riga>span{min-width:0;overflow-wrap:anywhere}.spazio{flex:1}button,.bottone{font:inherit;border:1px solid var(--bordo);background:var(--card);color:var(--testo);border-radius:12px;padding:12px 16px;min-height:48px;cursor:pointer}button.primario{background:var(--accento);color:#1a1409;border-color:transparent;font-weight:600}button.piccolo{min-height:36px;padding:6px 12px;font-size:.9rem}button:disabled{opacity:.5;cursor:default}input,textarea,select{font:inherit;width:100%;background:var(--sfondo);color:var(--testo);border:1px solid var(--bordo);border-radius:12px;padding:12px;min-height:48px}textarea{min-height:96px;resize:vertical}label{display:block;margin:10px 0 4px;color:var(--tenue);font-size:.9rem}.nav{position:fixed;bottom:0;left:0;right:0;display:flex;background:var(--card);border-top:1px solid var(--bordo);padding-bottom:var(--safe-area-inset-bottom, env(safe-area-inset-bottom, 0px))}.nav button{flex:1;border:0;border-radius:0;background:transparent;color:var(--tenue);padding:10px 4px 8px;font-size:.78rem;display:flex;flex-direction:column;gap:2px;align-items:center}.nav button span.icona{font-size:1.3rem}.nav button.attivo{color:var(--accento)}.banner-offline{background:var(--parziale);color:#1a1409;padding:8px 16px;font-size:.9rem;text-align:center}.badge{display:inline-block;border-radius:999px;padding:2px 10px;font-size:.78rem;border:1px solid var(--bordo);color:var(--tenue)}.badge.ok{color:var(--ok);border-color:var(--ok)}.badge.errore{color:var(--errore);border-color:var(--errore)}.badge.parziale{color:var(--parziale);border-color:var(--parziale)}.comandi{display:flex;gap:8px;overflow-x:auto;padding:4px 0 8px;scrollbar-width:none}.comandi button{white-space:nowrap}.chat{display:flex;flex-direction:column;gap:10px}.msg{padding:12px 14px;border-radius:var(--radius);max-width:92%;white-space:pre-wrap;word-break:break-word}.msg.tutor{background:var(--card);border:1px solid var(--bordo);align-self:flex-start}.msg.studente{background:color-mix(in srgb,var(--accento) 18%,var(--card));align-self:flex-end}.msg .meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px;font-size:.78rem;color:var(--tenue)}.msg .domanda{margin-top:8px;font-weight:600}.cit{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;padding:0 6px;border-radius:999px;background:var(--accento);color:#1a1409;font-size:.75rem;font-weight:700;margin:0 2px;cursor:pointer;vertical-align:middle}.scheda{position:fixed;inset:auto 0 0;background:var(--card);border-top:1px solid var(--bordo);border-radius:18px 18px 0 0;padding:16px;max-height:80vh;overflow:auto;z-index:20;box-shadow:0 -8px 30px #0006}.velo{position:fixed;inset:0;background:#00000073;z-index:19}.barra-input{position:sticky;bottom:calc(70px + var(--safe-area-inset-bottom, env(safe-area-inset-bottom, 0px)));background:var(--sfondo);padding:8px 0;display:flex;flex-direction:column;gap:8px}.barra-input .riga textarea{min-height:56px}.sicurezza{display:flex;gap:6px}.sicurezza button{flex:1;min-height:40px;padding:6px;font-size:.85rem}.sicurezza button.attivo{border-color:var(--accento);color:var(--accento)}.mcq .opzione{display:block;width:100%;text-align:left;margin:8px 0;padding:14px;font-size:1.05rem}.mcq .opzione.giusta{border-color:var(--ok)}.mcq .opzione.sbagliata{border-color:var(--errore)}.timer{font-variant-numeric:tabular-nums;font-size:1.1rem}.lista{list-style:none;padding:0;margin:0}.lista li{padding:10px 0;border-bottom:1px solid var(--bordo);overflow-wrap:anywhere}.progresso{height:8px;background:var(--bordo);border-radius:4px;overflow:hidden}.progresso>div{height:100%;background:var(--accento)}.pdf{width:100%;height:70vh;border:0;border-radius:var(--radius);background:#fff}.errore-testo{color:var(--errore)}pre.yaml{font:13px/1.4 ui-monospace,Menlo,monospace;white-space:pre-wrap}textarea.yaml{font:13px/1.4 ui-monospace,Menlo,monospace;min-height:320px}details.avanzato{margin-top:14px}details.avanzato summary{color:var(--tenue);cursor:pointer;padding:6px 0}details.avanzato textarea{margin-top:8px}.griglia2{display:grid;grid-template-columns:1fr 1fr;gap:10px}@media(max-width:420px){.griglia2{grid-template-columns:1fr}}.voce-stato{text-align:center;padding:22px 16px}.voce-fase{font-size:1.6rem;font-weight:700;margin-bottom:8px}.voce-livello{height:10px;background:var(--bordo);border-radius:5px;overflow:hidden;margin:10px auto;max-width:320px}.voce-livello>div{height:100%;background:var(--ok);transition:width .05s linear}.voce-testo{font-size:1.15rem;line-height:1.6}.voce-pulsanti{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:14px 0}button.grande{min-height:72px;min-width:140px;font-size:1.15rem;flex:1}.qr{background:#fff;padding:8px;border-radius:12px;display:inline-block}.qr svg{width:220px;height:220px;display:block}