:root{--blu:#173a5e;--blu2:#102e4c;--carta:#f7f6f1;--giallo:#f3d66b;--arancione:#f39223;--bordo:#dce2e7;--grigio:#627184;--bianco:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:#17202a;background:#fff;font-family:Arial,Helvetica,sans-serif;line-height:1.55}button,input,select{font:inherit}a{color:inherit}.contenitore{width:min(1180px,calc(100% - 48px));margin:auto}
.site-header{background:#fff;border-bottom:1px solid var(--bordo);position:sticky;top:0;z-index:20}.barra{min-height:94px;display:flex;align-items:center;justify-content:space-between;gap:28px}.logo-link{display:block;line-height:0}.logo{display:block;width:min(420px,46vw);height:72px;object-fit:contain;object-position:left center}.barra nav{display:flex;align-items:center;gap:20px}.barra nav>a{color:var(--blu);font-weight:700;text-decoration:none}.barra nav>a:hover{text-decoration:underline}.barra .youtube{padding:11px 16px;border-radius:8px;background:#d9342b;color:#fff;text-decoration:none}
.hero{position:relative;overflow:hidden;padding:66px 0 62px;color:#fff;background:linear-gradient(118deg,var(--blu2),var(--blu) 64%,#245782)}.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;background:var(--arancione);opacity:.94}.hero:before{width:170px;height:170px;right:7%;top:-90px}.hero:after{width:70px;height:70px;right:23%;bottom:-35px}.hero .contenitore{position:relative;z-index:1}.sopratitolo{margin:0 0 12px;color:var(--giallo);font-size:13px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.hero h1{max-width:880px;margin:0;font-size:clamp(40px,5.2vw,68px);line-height:1.04;letter-spacing:-.04em}.hero p.intro{max-width:720px;margin:22px 0 0;color:#e8eef5;font-size:19px}.aggiornamento{display:inline-flex;align-items:center;gap:8px;margin-top:24px;padding:8px 12px;border:1px solid #ffffff52;border-radius:999px;background:#ffffff12;font-size:14px}.punto{width:9px;height:9px;border-radius:50%;background:var(--giallo)}
main{padding:48px 0 82px}.sezione{scroll-margin-top:120px;margin-top:58px}.sezione:first-child{margin-top:0}.titolo-sezione{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.titolo-sezione h2{margin:0;color:var(--blu);font-size:clamp(28px,3vw,40px);letter-spacing:-.025em}.titolo-sezione p{margin:0;color:var(--grigio)}
.classi{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.classe-card{display:block;padding:25px;border:1px solid var(--bordo);border-radius:14px;background:var(--carta);text-decoration:none;box-shadow:0 6px 20px #173a5e0b}.classe-card strong{display:block;color:var(--blu);font-size:22px}.classe-card span{color:var(--grigio)}.classe-card:hover{border-color:var(--arancione);transform:translateY(-2px)}
.griglia-unita{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.unita-card{display:flex;min-height:195px;flex-direction:column;padding:24px;border:1px solid var(--bordo);border-radius:14px;text-decoration:none;background:#fff;box-shadow:0 8px 25px #173a5e0c}.unita-card:hover{border-color:var(--arancione);transform:translateY(-2px)}.badge{align-self:flex-start;padding:5px 9px;border-radius:6px;background:var(--arancione);color:#fff;font-size:12px;font-weight:800;letter-spacing:.05em}.unita-card h3{margin:14px 0 5px;color:var(--blu);font-size:22px;line-height:1.2}.unita-card p{margin:0;color:var(--grigio)}.freccia{margin-top:auto;padding-top:18px;color:var(--blu);font-weight:800}
.strumenti{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:14px;margin-bottom:20px}.strumenti input,.strumenti select{height:54px;border:1px solid #bac5cf;border-radius:9px;background:#fff;padding:0 16px;outline:0}.strumenti input:focus,.strumenti select:focus{border-color:var(--blu);box-shadow:0 0 0 3px #173a5e1f}.conteggio{margin:0 0 12px;color:var(--grigio);font-size:14px}.elenco{display:grid;gap:12px}.lezione-riga{display:grid;grid-template-columns:145px minmax(0,1fr) auto;align-items:center;gap:20px;padding:19px 21px;border:1px solid var(--bordo);border-radius:12px;text-decoration:none;background:#fff}.lezione-riga:hover{border-color:var(--arancione);box-shadow:0 7px 22px #173a5e0d}.codice{color:var(--arancione);font-size:13px;font-weight:900;text-transform:uppercase}.lezione-riga h3{margin:0;color:var(--blu);font-size:18px;line-height:1.3}.lezione-riga p{margin:3px 0 0;color:var(--grigio);font-size:14px}.apri{color:var(--blu);font-weight:800}
.breadcrumb{margin:0 0 22px;color:var(--grigio);font-size:14px}.breadcrumb a{color:var(--blu)}.pagina-intro{padding:48px 0 42px;background:var(--carta);border-bottom:1px solid var(--bordo)}.pagina-intro h1{max-width:900px;margin:8px 0 12px;color:var(--blu);font-size:clamp(36px,4.6vw,58px);line-height:1.08;letter-spacing:-.035em}.pagina-intro .lead{max-width:800px;margin:0;color:var(--grigio);font-size:18px}.etichetta{color:var(--arancione);font-size:13px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}
.lista-unita{display:grid;gap:14px}.scheda-lezione{display:grid;grid-template-columns:95px minmax(0,1fr) auto;align-items:center;gap:22px;padding:22px;border:1px solid var(--bordo);border-radius:13px;text-decoration:none}.scheda-lezione:hover{border-color:var(--arancione)}.numero-lezione{width:72px;height:72px;display:grid;place-items:center;border-radius:50%;background:var(--arancione);color:#fff;font-size:26px;font-weight:900}.scheda-lezione h2{margin:0;color:var(--blu);font-size:21px}.scheda-lezione p{margin:5px 0 0;color:var(--grigio)}
.lezione-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(290px,.75fr);gap:32px;align-items:start}.video-frame{aspect-ratio:16/9;overflow:hidden;border-radius:14px;background:var(--blu2);box-shadow:0 12px 30px #102e4c1d}.video-frame iframe{width:100%;height:100%;border:0}.video-assente{height:100%;display:grid;place-items:center;padding:35px;color:#fff;text-align:center}.pannello{padding:24px;border:1px solid var(--bordo);border-radius:14px;background:var(--carta)}.pannello h2{margin:0 0 14px;color:var(--blu);font-size:21px}.argomenti{list-style:none;margin:0;padding:0}.argomenti li{position:relative;padding:7px 0 7px 21px}.argomenti li:before{content:"";position:absolute;left:0;top:15px;width:8px;height:8px;border-radius:50%;background:var(--arancione)}.materiali{display:grid;gap:10px;margin-top:20px}.pulsante{min-height:48px;display:flex;align-items:center;justify-content:center;padding:10px 15px;border-radius:8px;background:var(--blu);color:#fff;font-weight:800;text-align:center;text-decoration:none}.pulsante:hover{background:var(--blu2)}.pulsante.secondario{background:#fff;color:var(--blu);border:1px solid var(--blu)}.pulsante.extra{background:var(--arancione)}.nessun-materiale{color:var(--grigio);font-size:14px}
.navigazione-lezioni{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:35px}.nav-card{padding:18px;border:1px solid var(--bordo);border-radius:11px;text-decoration:none}.nav-card:last-child{text-align:right}.nav-card small{display:block;color:var(--grigio)}.nav-card strong{color:var(--blu)}
footer{padding:30px 0;border-top:1px solid var(--bordo);background:var(--carta);color:var(--grigio);font-size:14px}.piede{display:flex;justify-content:space-between;gap:20px}.piede p{margin:0}.piede a{color:var(--blu);font-weight:700}[hidden]{display:none!important}
@media(max-width:900px){.griglia-unita{grid-template-columns:repeat(2,1fr)}.lezione-layout{grid-template-columns:1fr}.logo{width:min(350px,43vw)}.barra nav>a:not(.youtube){display:none}}
@media(max-width:650px){.contenitore{width:calc(100% - 28px)}.site-header{position:static}.barra{min-height:78px;gap:12px}.logo{width:min(245px,60vw);height:58px}.barra .youtube{padding:9px 10px;font-size:0}.barra .youtube:first-letter{font-size:18px}.hero{padding:45px 0 48px}.hero h1{font-size:39px}.hero p.intro{font-size:17px}.classi,.griglia-unita{grid-template-columns:1fr}.strumenti{grid-template-columns:1fr}.lezione-riga{grid-template-columns:1fr;gap:6px}.apri{display:none}.scheda-lezione{grid-template-columns:58px minmax(0,1fr);gap:14px}.numero-lezione{width:52px;height:52px;font-size:20px}.scheda-lezione .apri{display:none}.pagina-intro{padding:35px 0}.pagina-intro h1{font-size:36px}.navigazione-lezioni{grid-template-columns:1fr}.nav-card:last-child{text-align:left}.piede{display:block}.piede a{display:inline-block;margin-top:10px}}