:root{
  --accent:#2563eb; --accent-d:#1d4ed8;
  --bg:#f1f5f9; --card:#fff; --line:#e7eaf0; --ink:#0f172a; --muted:#64748b;
  --sidebar:#0f172a; --side-ink:#cbd5e1; --side-muted:#7689a8;
  --radius:12px;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 1px 3px rgba(16,24,40,.05);
  --shadow-lg:0 12px 34px rgba(16,24,40,.12);
}
*{box-sizing:border-box}
body{font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}

/* ---------- Layout shell ---------- */
.nav-chk{position:absolute;opacity:0;pointer-events:none}
.shell{display:flex;min-height:100vh}
.sidebar{width:252px;flex:0 0 252px;background:var(--sidebar);color:var(--side-ink);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
.sidebar::-webkit-scrollbar{width:7px}.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:4px}
.brand{display:flex;align-items:center;gap:11px;padding:18px 16px 16px;border-bottom:1px solid rgba(255,255,255,.07)}
.brand .logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#7c3aed);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:16px;flex:0 0 auto}
.brand .bt{min-width:0}
.brand b{color:#fff;font-size:14px;font-weight:600;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.brand small{color:var(--side-muted);font-size:11px}
.nav{flex:1;padding:8px 10px 14px}
.nav-group{margin-top:14px}
.nav-group-t{font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--side-muted);padding:0 10px 6px;font-weight:700}
.nav-a{display:flex;align-items:center;gap:10px;padding:8px 11px;border-radius:9px;color:var(--side-ink);font-size:13.5px;margin-bottom:2px;transition:background .12s,color .12s}
.nav-a:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-a.on{background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;font-weight:600;box-shadow:0 4px 14px rgba(37,99,235,.4)}
.nav-a .ico{width:8px;height:8px;border-radius:50%;background:currentColor;opacity:.5;flex:0 0 auto}
.nav-a.on .ico{opacity:1}
.nav-pill{margin-left:auto;background:#ef4444;color:#fff;font-size:10.5px;font-weight:700;padding:1px 7px;border-radius:10px}
.nav-a.on .nav-pill{background:rgba(255,255,255,.28)}
.side-foot{padding:12px;border-top:1px solid rgba(255,255,255,.07);display:flex;align-items:center;gap:10px}
.side-foot .av{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:700;flex:0 0 auto}
.side-foot .who{min-width:0;flex:1}
.side-foot .who b{display:block;color:#e2e8f0;font-size:12px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-foot .who a{color:var(--side-muted);font-size:11px}
.side-foot .who a:hover{color:#fff}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{min-height:60px;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:10px 24px;position:sticky;top:0;z-index:5}
.topbar h1{font-size:16px;margin:0;font-weight:600;letter-spacing:-.01em}
.topbar .role{margin-left:auto;font-size:11px;font-weight:600;color:var(--accent);background:#eaf1ff;padding:5px 11px;border-radius:20px}
.nav-burger{display:none}
.nav-ovl{display:none}
.content{padding:26px 24px;max-width:1280px;width:100%;margin:0 auto}

/* ---------- Components ---------- */
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px;font-size:11.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-weight:600}
.card .big{font-size:27px;font-weight:700;letter-spacing:-.02em}
.card .sub{font-size:12px;color:var(--muted);margin-top:4px}
table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:13.5px;box-shadow:var(--shadow)}
th,td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f8fafc;font-size:11px;text-transform:uppercase;color:var(--muted);letter-spacing:.03em;font-weight:600}
tr:last-child td{border-bottom:none}
tr:hover td{background:#f8fbff}
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:600}
.badge.ok{background:#e7f6ec;color:#1a7f37}.badge.warn{background:#fef7e0;color:#8a6d00}.badge.off{background:#fde8e8;color:#b42318}
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:#fff;border:none;padding:9px 16px;border-radius:9px;cursor:pointer;font-size:13.5px;text-decoration:none;font-weight:500;transition:filter .12s,transform .08s,box-shadow .12s;box-shadow:0 1px 2px rgba(37,99,235,.28)}
.btn:hover{filter:brightness(1.06);box-shadow:0 5px 14px rgba(37,99,235,.32)}
.btn:active{transform:translateY(1px)}
.btn.sec{background:#eef2f7;color:var(--ink);box-shadow:none}.btn.sec:hover{background:#e3e8f0;filter:none}
.btn.danger{background:#dc2626;box-shadow:0 1px 2px rgba(220,38,38,.28)}
.btn.sm{padding:5px 11px;font-size:12px;border-radius:7px}
form.box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
label{display:block;font-size:12.5px;color:var(--muted);margin:12px 0 5px;font-weight:600}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],textarea,select{width:100%;padding:10px 12px;border:1px solid #d7dae0;border-radius:9px;font-size:14px;font-family:inherit;background:#fff;transition:border-color .12s,box-shadow .12s}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
textarea{resize:vertical;min-height:70px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.flash{padding:12px 16px;border-radius:10px;margin-bottom:18px;font-size:13.5px;font-weight:500;box-shadow:var(--shadow)}
.flash.ok{background:#e7f6ec;color:#1a7f37}.flash.err{background:#fde8e8;color:#b42318}
.muted{color:var(--muted)}
h2.sec{font-size:16px;margin:24px 0 14px;font-weight:600;letter-spacing:-.01em}
h3.sec{font-weight:600}
.bar{height:8px;background:#eef0f3;border-radius:6px;overflow:hidden}
.bar>span{display:block;height:100%;background:var(--accent)}
.bar.warn>span{background:#e0a800}.bar.over>span{background:#dc2626}
small.code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#f0f2f5;padding:1px 6px;border-radius:5px;font-size:12px}

/* ---------- Login ---------- */
.login{max-width:390px;margin:8vh auto;padding:0 20px}
.login .lbrand{text-align:center;margin-bottom:22px}
.login .lbrand .logo{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--accent),#7c3aed);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:22px;box-shadow:var(--shadow-lg)}
.login .lbrand h2{margin:14px 0 2px;font-size:18px}
.login .lbrand p{margin:0;color:var(--muted);font-size:13px}
.login form.box{box-shadow:var(--shadow-lg)}

/* ---------- Responsive ---------- */
@media(max-width:860px){
  .nav-burger{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer;font-size:18px;color:var(--ink);flex:0 0 auto}
  .sidebar{position:fixed;left:0;top:0;z-index:60;transform:translateX(-100%);transition:transform .22s ease;box-shadow:var(--shadow-lg)}
  .nav-chk:checked ~ .shell .sidebar{transform:none}
  .nav-ovl{position:fixed;inset:0;background:rgba(2,6,23,.45);z-index:50}
  .nav-chk:checked ~ .shell .nav-ovl{display:block}
  .content{padding:18px 16px}
  .row2{grid-template-columns:1fr}
  table{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
}

/* ---------- Dark mode (segue le preferenze del sistema) ---------- */
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b1120; --card:#131b2e; --line:#26324a; --ink:#e5ecf7; --muted:#93a3bd; }
  th{background:#0f1830;color:#93a3bd}
  tr:hover td{background:rgba(255,255,255,.03)}
  .topbar{background:rgba(15,23,42,.85)}
  .topbar .role{background:#1e2a44}
  .nav-burger{background:#131b2e;color:#e5ecf7}
  input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],textarea,select{background:#0f1830;border-color:#2c3a56;color:#e5ecf7}
  .btn.sec{background:#26324a;color:#e5ecf7}.btn.sec:hover{background:#30405e}
  .bar{background:#26324a}
  small.code{background:#26324a;color:#cbd5e1}
  .badge.ok{background:#0f2e1c;color:#4ade80}.badge.warn{background:#3a2f0a;color:#fbbf24}.badge.off{background:#3a1414;color:#f87171}
  .flash.ok{background:#0f2e1c;color:#86efac}.flash.err{background:#3a1414;color:#fca5a5}
}