/* manual.css — pagine per-manuale (recap argomenti + esercizi a fisarmonica).
   Generate da tools/gen_manuals.py a partire dai README di book_labs.
   Coerente con lo stile dell'index (font, palette, taglio "terminale"). */
:root{
  --bg:#F4F5F2; --panel:#FFFFFF; --bg-alt:#ECEDE8;
  --ink:#1E2228; --soft:#6B7178;
  --prompt:#1A8F6B; --accent:#16B070; --path:#C24A8E; --kw:#2D6CC4;
  --hairline:rgba(30,34,40,0.10); --hairline-strong:rgba(30,34,40,0.16);
  --shadow:0 24px 60px -32px rgba(30,34,40,0.4);
  /* livelli della collana (fissi) */
  --lv-fond:#2e7d32; --lv-interm:#1565c0; --lv-avan:#c62828; --lv-cloud:#4a148c;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--ink);font-family:'JetBrains Mono',monospace;font-weight:400;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
a{color:inherit;text-decoration:none;}
::selection{background:var(--accent);color:#fff;}
body::before{content:'';position:fixed;inset:0;z-index:60;pointer-events:none;opacity:0.5;background:repeating-linear-gradient(0deg,rgba(30,34,40,0.015) 0,rgba(30,34,40,0.015) 1px,transparent 1px,transparent 4px);}

/* nav (come index) */
nav{position:fixed;top:0;left:0;right:0;z-index:40;display:flex;justify-content:space-between;align-items:center;padding:20px 5vw;font-size:12px;letter-spacing:0.04em;color:var(--soft);background:linear-gradient(180deg,rgba(244,245,242,0.96) 0%,rgba(244,245,242,0) 100%);backdrop-filter:blur(4px);}
nav .mark{color:var(--ink);font-weight:700;letter-spacing:0.08em;}
nav .mark .dot{color:var(--accent);}
nav .nav-right{display:flex;gap:26px;align-items:center;}
nav a{transition:color .25s ease;}
nav a:hover{color:var(--accent);}
nav .lang a.active{color:var(--ink);font-weight:500;}

/* hero manuale */
.mhero{max-width:1080px;margin:0 auto;padding:118px 5vw 8px;}
.crumb{font-size:12px;color:var(--soft);margin-bottom:26px;}
.crumb a:hover{color:var(--accent);}
.crumb .sep{opacity:0.5;margin:0 8px;}
.eyebrow{font-size:12px;letter-spacing:0.16em;text-transform:uppercase;color:var(--vol);font-weight:500;margin-bottom:14px;}
.mhero h1{font-family:'Fraunces',serif;font-weight:400;font-size:clamp(40px,6.4vw,72px);line-height:1.0;letter-spacing:-0.01em;color:var(--ink);}
.mhero .metaphor{font-family:'Fraunces',serif;font-style:italic;font-size:clamp(18px,2.4vw,25px);color:var(--soft);margin-top:16px;max-width:42ch;line-height:1.4;}
.mstats{display:flex;flex-wrap:wrap;gap:12px 22px;margin-top:30px;font-size:13px;color:var(--soft);align-items:center;}
.mstats .bar{width:44px;height:3px;background:var(--vol);border-radius:3px;}
.mstats b{color:var(--ink);font-weight:500;}
.legend{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}

/* riquadro pull (sparse checkout) */
.pull{margin:30px 0 0;background:var(--panel);border:1px solid var(--hairline-strong);border-radius:10px;overflow:hidden;box-shadow:var(--shadow);max-width:660px;}
.pull .pbar{display:flex;align-items:center;gap:12px;padding:11px 16px;border-bottom:1px solid var(--hairline);background:var(--bg-alt);}
.pull .pbar i{width:10px;height:10px;border-radius:50%;display:inline-block;}
.pull .pbar i:nth-child(1){background:#E8645A;} .pull .pbar i:nth-child(2){background:#E3B341;} .pull .pbar i:nth-child(3){background:#42C063;}
.pull .pbar span{font-size:11.5px;color:var(--soft);margin-left:4px;}
.pull pre{padding:16px 18px;font-size:12.5px;line-height:1.85;overflow-x:auto;color:var(--ink);}
.pull pre .c{color:var(--soft);}

/* sezioni */
.block{max-width:1080px;margin:0 auto;padding:clamp(42px,6vh,72px) 5vw;}
.block .bhead{display:flex;align-items:center;gap:12px;margin-bottom:34px;font-size:13px;color:var(--soft);flex-wrap:wrap;}
.block .bhead .pr{color:var(--prompt);font-weight:500;}
.block .bhead .cmd{color:var(--kw);font-weight:500;}
.block .bhead .arg{color:var(--path);}
.block .bhead .rule{flex:1;height:1px;background:var(--hairline);min-width:30px;}

/* badge livello */
.badge{font-size:10.5px;letter-spacing:0.03em;padding:2px 9px;border-radius:999px;color:#fff;white-space:nowrap;font-weight:500;}
.badge.fond{background:var(--lv-fond);} .badge.interm{background:var(--lv-interm);}
.badge.avan{background:var(--lv-avan);} .badge.cloud{background:var(--lv-cloud);}

/* recap: Parti */
.parts{display:grid;gap:18px;}
.part{border:1px solid var(--hairline);border-radius:12px;padding:22px 26px;background:var(--panel);}
.part .pnum{color:var(--vol);font-size:11.5px;letter-spacing:0.1em;text-transform:uppercase;}
.part h3{font-family:'Fraunces',serif;font-weight:400;font-size:23px;color:var(--ink);margin:4px 0 14px;}
.part ul{list-style:none;display:grid;gap:9px;}
.part li{display:flex;gap:14px;align-items:baseline;font-size:14px;line-height:1.4;}
.part li .n{color:var(--soft);font-variant-numeric:tabular-nums;min-width:2.2em;}
.part li .t{flex:1;color:var(--ink);}
.appx{margin-top:20px;font-size:13.5px;color:var(--soft);line-height:1.7;}
.appx b{color:var(--ink);font-weight:500;}

/* esercizi a fisarmonica */
.exlist{display:grid;gap:12px;}
details.ex{border:1px solid var(--hairline);border-radius:12px;background:var(--panel);overflow:hidden;transition:border-color .2s ease;}
details.ex[open]{border-color:var(--vol);box-shadow:var(--shadow);}
details.ex summary{list-style:none;cursor:pointer;padding:18px 22px;display:flex;gap:14px;align-items:center;}
details.ex summary::-webkit-details-marker{display:none;}
summary .exn{font-family:'Fraunces',serif;color:var(--vol);font-size:19px;min-width:2.6em;font-variant-numeric:tabular-nums;}
summary .extitle{font-family:'Fraunces',serif;font-size:19px;color:var(--ink);flex:1;line-height:1.2;}
summary .chev{color:var(--soft);transition:transform .25s ease;flex:0 0 auto;}
details.ex[open] summary .chev{transform:rotate(90deg);color:var(--vol);}
.exbody{padding:2px 22px 26px;}
.exbody h4{font-size:11.5px;letter-spacing:0.12em;text-transform:uppercase;color:var(--soft);margin:22px 0 10px;}
.exbody p{font-size:14px;line-height:1.75;color:var(--ink);max-width:72ch;}
.exbody p + p{margin-top:10px;}
.exbody ul{margin-top:8px;list-style:none;display:grid;gap:7px;}
.exbody ul li{font-size:14px;line-height:1.6;padding-left:20px;position:relative;max-width:72ch;color:var(--ink);}
.exbody ul li::before{content:'›';position:absolute;left:2px;color:var(--vol);font-weight:700;}
.exbody pre{background:var(--bg-alt);border:1px solid var(--hairline);border-radius:8px;padding:14px 16px;font-size:12.5px;line-height:1.7;overflow-x:auto;margin-top:4px;}
.exbody code{background:var(--bg-alt);padding:1px 5px;border-radius:4px;font-size:0.92em;}
.exbody p code{background:var(--bg-alt);}
.exlinks{margin-top:22px;display:flex;gap:20px;flex-wrap:wrap;font-size:13px;}
.exlinks a{color:var(--vol);border-bottom:1px solid transparent;transition:border-color .2s ease;}
.exlinks a:hover{border-color:var(--vol);}

footer{max-width:1080px;margin:0 auto;padding:34px 5vw 60px;border-top:1px solid var(--hairline);font-size:11.5px;color:var(--soft);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;}
footer a:hover{color:var(--accent);}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none;}}

@media (max-width:640px){
  nav .nav-right{gap:16px;}
  .exbody{padding:2px 16px 22px;}
  details.ex summary{padding:16px;}
}