:root{
  --navy:#1C3A5E;--sky:#29ABE2;--sky-l:#CDEBFA;--tint:#E4F4FC;--bg:#EEF7FC;--card:#FFFFFF;
  --ink:#111827;--ink2:#374151;--muted:#4B5563;--line:#E5E7EB;--red:#D52B1E;--green:#1A7F45;
  --quiz-bg:#FFF6D6;--quiz-ink:#4A3700;--quiz-line:#E8C34A;
  --head:'Barlow',system-ui,sans-serif;--body:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
img{max-width:100%}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{max-width:640px;margin:0 auto;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}

/* cover */
.cover{position:relative;overflow:hidden;background:var(--navy);color:#fff;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}
.cover .bg{position:absolute;inset:0;background:url(assets/road-bg.webp) center top/cover no-repeat}
.cover .scene{position:absolute;left:0;right:0;top:0;height:100%;pointer-events:none}
.cover .sg{position:absolute;display:flex;flex-direction:column;align-items:center}
.cover .sg img{display:block;height:auto}
.cover .sg i{display:block;background:#8A97A8;border-radius:0 0 2px 2px}
.cover .top{position:relative;padding:calc(48px + env(safe-area-inset-top)) 28px 0;display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.pill{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#fff;background:var(--navy);padding:6px 12px;border-radius:999px}
.cover h1{margin:0;font-family:var(--head);font-weight:800;font-size:clamp(40px,12vw,56px);line-height:.98;color:var(--navy)}
.cover .lead{margin:0;font-size:16px;font-weight:600;color:var(--navy)}
.cover .bottom{position:relative;margin-top:auto;padding:0 24px calc(22px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:12px}
.btn{display:flex;align-items:center;justify-content:center;gap:10px;min-height:56px;border-radius:16px;font-weight:700;border:0;cursor:pointer}
.btn-pri{background:var(--sky);color:#fff;font-family:var(--head);font-size:21px}
.btn-sec{min-height:48px;border-radius:14px;border:1.5px solid rgba(255,255,255,.4);color:#fff;font-weight:600;font-size:15px;background:transparent}
.made{display:flex;align-items:center;justify-content:center;gap:10px;padding-top:8px}
.made span{font-size:12px;color:var(--sky-l)}
.made b{display:inline-flex;background:#fff;border-radius:10px;padding:5px 8px}
.made img{height:28px;width:auto;display:block}

/* headers */
.hdr{position:sticky;top:0;z-index:5;background:var(--navy);color:#fff;padding:calc(12px + env(safe-area-inset-top)) 16px 16px;display:flex;flex-direction:column;gap:14px}
.hdr.light{background:#fff;color:var(--ink);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:8px}
.ib{display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.14);border:0;cursor:pointer;color:inherit;gap:6px;padding:0 10px;font-weight:600;font-size:14px}
.hdr.light .ib{background:var(--bg)}
.kick{font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--sky-l)}
.hdr.light .kick{color:var(--muted)}
.hdr h1{margin:0;font-family:var(--head);font-weight:800;font-size:clamp(28px,8vw,36px);line-height:1.02}
.prog{display:flex;flex-direction:column;gap:7px}
.prog .row{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}
.track{height:8px;border-radius:999px;background:var(--line);overflow:hidden}
.track>div{height:8px;background:var(--red);border-radius:999px}

/* lessons */
.list{padding:16px;display:flex;flex-direction:column;gap:8px}
.les{display:flex;align-items:center;gap:14px;padding:12px 14px;background:var(--card);border-radius:14px;min-height:64px}
.les .ic{flex:0 0 auto;width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:var(--tint)}
.les .tx{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.les small{font-size:12px;color:var(--muted)}
.les strong{font-weight:600;font-size:15px;line-height:1.25}
.les .bar2{height:4px;border-radius:9px;background:var(--line);margin-top:6px;overflow:hidden}
.les .bar2>div{height:4px;background:var(--green)}
.chev{flex:0 0 auto;color:#6B7280}

/* chapter grid */
.grid{padding:16px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
@media(min-width:560px){.grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.card{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 8px 12px;background:var(--card);border-radius:16px;min-height:150px}
.card .th{width:100%;height:76px;display:flex;align-items:center;justify-content:center}
.card .th img{max-width:88%;max-height:76px;object-fit:contain}
.card span{font-size:12.5px;font-weight:600;line-height:1.25;text-align:center;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .sub{font-weight:500;color:var(--muted)}
.ok{position:absolute;top:8px;right:8px;width:22px;height:22px;border-radius:999px;background:var(--green);display:inline-flex;align-items:center;justify-content:center}
.les .ok{position:static;flex:0 0 auto}
.num{flex:0 0 auto;width:32px;height:32px;border-radius:999px;background:var(--tint);color:var(--navy);font-weight:700;font-size:13px;display:inline-flex;align-items:center;justify-content:center}

/* scheda */
.sch{flex:1;display:flex;flex-direction:column}
.shead{background:#fff;padding:8px 20px 22px;display:flex;flex-direction:column;gap:14px;align-items:center;text-align:center}
.shead .pic{display:flex;justify-content:center;width:100%}
.shead .pic img{max-height:220px;max-width:100%;object-fit:contain}
.shead .pic.tav img{max-height:none;width:100%;border-radius:14px}
.shead h1{margin:0;font-family:var(--head);font-weight:800;font-size:clamp(26px,7.4vw,34px);line-height:1.06}
.body{padding:16px;display:flex;flex-direction:column;gap:12px}
.sec{background:#fff;border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:10px}
.sec h2,.sec h3{margin:0;font-family:var(--head);font-weight:700;font-size:20px;line-height:1.2;color:var(--navy)}
.sec h3{color:#8A1F17}
.sec p{margin:0;font-size:16px;line-height:1.6;color:var(--ink2)}
.sec ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:7px;font-size:16px;line-height:1.55;color:var(--ink2)}
.sec .pic{display:flex;justify-content:center}
.sec .pic img{max-height:220px;object-fit:contain}
.quiz{background:var(--quiz-bg);box-shadow:inset 0 0 0 1.5px var(--quiz-line)}
.quiz h2{color:#5C4300;display:flex;align-items:center;gap:8px;font-size:19px}
.quiz p{color:var(--quiz-ink)}
.done{display:flex;align-items:center;justify-content:center;gap:10px;min-height:54px;border-radius:14px;border:0;background:#fff;color:var(--green);box-shadow:inset 0 0 0 2px var(--green);font-weight:600;font-size:16px;cursor:pointer}
.done.on{background:var(--green);color:#fff;box-shadow:none}
.pn{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.pn a{display:flex;flex-direction:column;gap:2px;padding:12px 14px;background:#fff;border-radius:14px;min-height:64px}
.pn a.nx{background:var(--navy);color:#fff;align-items:flex-end;text-align:right}
.pn small{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--muted)}
.pn a.nx small{color:var(--sky-l)}
.pn strong{font-weight:600;font-size:15px;line-height:1.25;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pn .ph{visibility:hidden}

/* search */
#srch{position:fixed;inset:0;z-index:20;background:rgba(5,12,24,.55);display:flex;justify-content:center;align-items:flex-start}
#srch[hidden]{display:none}
.sbox{width:100%;max-width:640px;max-height:80vh;display:flex;flex-direction:column;background:var(--bg);padding:calc(14px + env(safe-area-inset-top)) 16px 14px;border-radius:0 0 18px 18px;box-shadow:0 12px 30px rgba(0,0,0,.35)}
#q{height:48px;border:0;border-radius:12px;padding:0 14px;font:inherit;font-size:16px;background:#fff;box-shadow:0 0 0 2px var(--sky-l);outline:none}
#q:focus{box-shadow:0 0 0 2px var(--sky)}
#res{overflow:auto;margin-top:8px}
#res:empty{display:none}
#res a{display:block;padding:12px 6px;border-bottom:1px solid var(--line)}
#res b{display:block;font-weight:600;font-size:15px}
#res small{display:block;color:var(--muted);font-size:13px;margin-top:3px;line-height:1.4}
#res .none{padding:14px 6px;color:var(--muted)}

@media (hover:hover) and (pointer:fine){
  .les:hover,.card:hover,.pn a:hover{box-shadow:0 0 0 2px var(--sky)}
  .btn-pri:hover{filter:brightness(1.06)}
}
a:focus-visible,button:focus-visible{outline:3px solid var(--sky);outline-offset:2px}