:root{
  --bg:#f3f6f9; --card:#fff; --ink:#15232f; --mut:#62747f; --line:#dbe3e9;
  --brand:#0f3d5e; --brand2:#1a6a9a; --red:#c62828; --amber:#b26a00; --green:#2e7d32;
  --redbg:#fdecea; --amberbg:#fff3e0; --greenbg:#e8f5e9; --graybg:#eceff1;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-text-size-adjust:100%}
a{color:var(--brand2);text-decoration:none}
h1{font-size:1.35rem;margin:.2rem 0 .8rem}
h2{font-size:1.05rem;margin:1.4rem 0 .5rem;color:var(--brand)}
button,input,select,textarea{font:inherit;color:inherit}
[hidden]{display:none!important}

/* layout */
.topbar{position:sticky;top:0;z-index:20;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:calc(.6rem + env(safe-area-inset-top)) 1rem .6rem}
.topbar b{font-size:1.05rem}
.topbar .who{font-size:.8rem;opacity:.85;display:flex;gap:.6rem;align-items:center}
.topbar button{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:8px;padding:.25rem .6rem;font-size:.8rem}
main{max-width:980px;margin:0 auto;padding:1rem 1rem 6rem}
nav.tabs{position:fixed;bottom:0;left:0;right:0;z-index:20;background:#fff;border-top:1px solid var(--line);display:flex;padding-bottom:env(safe-area-inset-bottom)}
nav.tabs a{flex:1;text-align:center;padding:.55rem .2rem;font-size:.72rem;color:var(--mut)}
nav.tabs a .ic{display:block;font-size:1.25rem;line-height:1.2}
nav.tabs a.on{color:var(--brand);font-weight:600}
@media(min-width:760px){
  nav.tabs{position:sticky;top:48px;bottom:auto;border-top:0;border-bottom:1px solid var(--line);justify-content:center;gap:.5rem}
  nav.tabs a{flex:0 0 auto;padding:.6rem 1.1rem;font-size:.9rem}
  nav.tabs a .ic{display:inline;margin-right:.35rem;font-size:1rem}
  main{padding-bottom:3rem}
}

/* cards & lists */
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.9rem 1rem;margin-bottom:.7rem}
.item{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.75rem .9rem;margin-bottom:.55rem;color:inherit}
.item:active{background:#f0f5f9}
.item .t{font-weight:600}
.item .s{font-size:.85rem;color:var(--mut);margin-top:.1rem}
.row{display:flex;justify-content:space-between;align-items:center;gap:.6rem}
.row.wrap{flex-wrap:wrap}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.6rem}
@media(min-width:760px){.grid.g4{grid-template-columns:repeat(4,1fr)}}
.stat{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.8rem;color:inherit}
.stat b{display:block;font-size:1.8rem;line-height:1.1}
.stat span{font-size:.8rem;color:var(--mut)}
.stat.red b{color:var(--red)} .stat.amber b{color:var(--amber)} .stat.green b{color:var(--green)}
.kv{display:grid;grid-template-columns:130px 1fr;gap:.25rem .8rem;font-size:.92rem}
.kv dt{color:var(--mut)} .kv dd{margin:0}
.empty{color:var(--mut);text-align:center;padding:1.2rem .5rem}
.muted{color:var(--mut);font-size:.85rem}

/* badges */
.badge{display:inline-block;border-radius:999px;padding:.1rem .6rem;font-size:.75rem;font-weight:600;white-space:nowrap}
.badge.red{background:var(--redbg);color:var(--red)} .badge.amber{background:var(--amberbg);color:var(--amber)}
.badge.green{background:var(--greenbg);color:var(--green)} .badge.gray{background:var(--graybg);color:var(--mut)}
.badge.blue{background:#e3f1fb;color:var(--brand2)}

/* buttons & forms */
.btn{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:.6rem 1rem;font-weight:600;cursor:pointer}
.btn.sec{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.danger{background:#fff;color:var(--red);border:1px solid var(--red)}
.btn.ok{background:var(--green)}
.btn.sm{padding:.3rem .7rem;font-size:.85rem;border-radius:8px}
.btn:disabled{opacity:.5}
.actions{display:flex;flex-wrap:wrap;gap:.5rem;margin:.6rem 0}
label{display:block;font-size:.85rem;color:var(--mut);margin-bottom:.7rem}
input,select,textarea{display:block;width:100%;margin-top:.2rem;padding:.55rem .65rem;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);font-size:16px}
input[type=checkbox],input[type=radio]{display:inline-block;width:auto;margin:0 .35rem 0 0}
textarea{resize:vertical}
.search{margin-bottom:.7rem}
.filters{display:flex;gap:.5rem;margin-bottom:.7rem}
.filters select{margin:0}

/* modal */
.modal{position:fixed;inset:0;z-index:50;background:rgba(10,25,40,.55);display:flex;align-items:flex-end;justify-content:center}
.sheet{background:#fff;width:100%;max-width:560px;max-height:92vh;overflow:auto;border-radius:16px 16px 0 0;padding:1rem 1rem calc(1rem + env(safe-area-inset-bottom))}
@media(min-width:760px){.modal{align-items:center}.sheet{border-radius:16px}}
.sheet h2{margin-top:.2rem}

/* login */
.login{max-width:380px;margin:12vh auto;padding:1.4rem;background:#fff;border:1px solid var(--line);border-radius:16px}
.login h1{text-align:center;color:var(--brand)}
.login .btn{width:100%;margin-top:.3rem}
.login .alt{text-align:center;margin-top:.8rem;font-size:.9rem}
.err{color:var(--red);font-size:.9rem;margin:.4rem 0}

/* checklist */
.chk{border-top:1px solid var(--line);padding:.6rem 0}
.chk:first-child{border-top:0}
.chk-v{margin-bottom:.35rem}
.seg{display:flex;gap:.4rem}
.seg label{margin:0;flex:1}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;text-align:center;padding:.45rem 0;border:1px solid var(--line);border-radius:9px;color:var(--ink);background:#fff;font-size:.9rem;font-weight:600}
.seg input:checked+span.ok{background:var(--green);border-color:var(--green);color:#fff}
.seg input:checked+span.ko{background:var(--red);border-color:var(--red);color:#fff}
.seg input:checked+span.na{background:#78909c;border-color:#78909c;color:#fff}
.chk-n{margin-top:.4rem;padding:.4rem .6rem;font-size:.9rem}
.mat{display:grid;grid-template-columns:1fr 70px 70px 34px;gap:.4rem;margin-bottom:.4rem}
.mat input,.mat select{margin:0}
canvas.sig{width:100%;height:150px;border:1px dashed #90a4ae;border-radius:10px;background:#fff;touch-action:none}

/* toast */
#toast{position:fixed;left:50%;bottom:5.5rem;transform:translateX(-50%);background:#22313c;color:#fff;padding:.6rem 1rem;border-radius:10px;z-index:99;max-width:90vw;font-size:.9rem}
#toast.err{background:var(--red)}

/* stampa rapporto */
#print-area{display:none}
@media print{
  body{background:#fff}
  #app,#toast{display:none!important}
  #print-area{display:block;color:#000;font:11pt/1.35 Arial,Helvetica,sans-serif}
  .pr h1{font-size:16pt;margin:0}
  .pr .hd{display:flex;justify-content:space-between;align-items:flex-start;border:1px solid #999;padding:8px 10px;margin-bottom:10px}
  .pr .hd .az{font-weight:700;font-size:13pt}
  .pr table{width:100%;border-collapse:collapse;margin:6px 0 10px}
  .pr th,.pr td{border:1px solid #999;padding:4px 6px;text-align:left;vertical-align:top;font-size:10pt}
  .pr th{background:#eef2f5;width:28%}
  .pr table.list th{width:auto}
  .pr h3{font-size:11pt;margin:10px 0 3px;border-bottom:1px solid #999}
  .pr .firma img{max-height:90px}
  .pr .ko{font-weight:700}
  .pr .foot{margin-top:14px;font-size:8pt;color:#555;text-align:center}
}