:root{
  --bg:#fafaf8; --fg:#16171a; --muted:#6b6f76; --line:#e4e4df; --card:#ffffff;
  --accent:#2f6b4f; --accent-fg:#fff; --radius:14px; --max:1080px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#101112; --fg:#f2f2ef; --muted:#9a9ea6; --line:#2a2c30; --card:#17191b; --accent:#6fbf93; --accent-fg:#0b1a12; }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg);line-height:1.55}
body{min-height:100vh;display:flex;flex-direction:column}
a{color:inherit}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:24px 20px 56px;flex:1}

/* header */
.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top{display:flex;align-items:center;gap:16px;padding:14px 20px;max-width:var(--max);margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;letter-spacing:-.01em}
#nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
#nav a{text-decoration:none;color:var(--muted);padding:6px 10px;border-radius:999px;font-size:.92rem}
#nav a:hover{color:var(--fg)}
#nav a.on{color:var(--fg);background:var(--line)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:var(--fg);padding:6px 12px;border-radius:999px;font:inherit;cursor:pointer}

/* home */
.hero{padding:40px 0 24px}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.05;letter-spacing:-.03em;margin:0 0 12px;max-width:16ch}
.hero p{color:var(--muted);font-size:1.1rem;max-width:58ch;margin:0}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));margin-top:28px}
.card{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-decoration:none;transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-2px);border-color:var(--accent)}
.card svg{color:var(--accent);margin-bottom:6px}
.card h3{margin:0;font-size:1.08rem}
.card p{margin:0;color:var(--muted);font-size:.93rem}

/* page */
.crumb{font-size:.9rem;color:var(--muted);margin-bottom:8px}
.crumb a{text-decoration:none}
h1.title{font-size:clamp(1.7rem,4vw,2.4rem);letter-spacing:-.02em;margin:0 0 6px}
.lead{color:var(--muted);margin:0 0 24px;max-width:70ch}
.panel{display:grid;gap:24px;grid-template-columns:1fr;align-items:start}
@media (min-width:860px){.panel{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.box h2{font-size:1rem;margin:0 0 14px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.fields{display:grid;gap:14px;grid-template-columns:1fr 1fr}
.fields .full{grid-column:1/-1}
label{display:grid;gap:6px;font-size:.92rem;color:var(--muted)}
input,select{font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;width:100%;min-width:0}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px}
.unit{font-size:.8rem}
.btn{margin-top:18px;width:100%;font:inherit;font-weight:600;background:var(--accent);color:var(--accent-fg);border:0;border-radius:10px;padding:12px;cursor:pointer}
.btn:hover{filter:brightness(1.06)}
.results{display:grid;gap:10px}
.res{display:flex;justify-content:space-between;gap:12px;align-items:baseline;border-bottom:1px dashed var(--line);padding-bottom:10px}
.res span{color:var(--muted)}
.res strong{font-size:1.25rem;font-variant-numeric:tabular-nums}
.note{font-size:.88rem;color:var(--muted);margin-top:14px}
.err{color:#c0392b;font-size:.9rem;min-height:1.2em}
.draw{width:100%;height:auto;color:var(--fg);margin-bottom:12px}
.draw .dim{fill:var(--accent);font-size:12px;font-family:inherit}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap}
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:8px 16px}
.section{margin-top:32px}
.section h2{font-size:1.2rem;margin:0 0 12px}

.foot{border-top:1px solid var(--line);padding:20px;text-align:center;color:var(--muted);font-size:.85rem}

/* mobile */
@media (max-width:720px){
  #nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg);flex-direction:column;padding:10px 20px;border-bottom:1px solid var(--line)}
  #nav.open{display:flex}
  #nav a{padding:10px 4px;border-radius:0;border-bottom:1px solid var(--line)}
  .menu-btn{display:block}
  .top{position:sticky}
  .fields{grid-template-columns:1fr}
  .hero{padding-top:20px}
}

/* --- Grafici automatici --- */
.charts { margin-top: 1.5rem; display: grid; gap: 1rem; }
.chh { margin: 0.5rem 0 0; }
.chart-box { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1rem; }
.chart-box h3 { margin: 0 0 .6rem; font-size: 1rem; color: var(--fg); }
.chart { width: 100%; height: auto; display: block; }
.chart .bar { fill: var(--accent); }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .mark { fill: #c1121f; }
.chart .ct { font-size: 12px; fill: var(--muted); font-family: inherit; }
.chart polyline { stroke-linejoin: round; }
.sel { display: flex; flex-wrap: wrap; gap: .8rem; margin-bottom: .6rem; }
.sel label { display: grid; gap: .25rem; font-size: .9rem; }
.sel select { padding: .4rem .5rem; border-radius: 6px; border: 1px solid #ccc; max-width: 100%; }

/* --- Layout v2: sidebar + ricerca --- */
.top{max-width:none;margin:0;z-index:30;padding:12px 20px}
.search{flex:1;max-width:420px;margin-left:auto;border-radius:999px;padding:9px 16px}
.menu-btn{display:none}
.layout{display:grid;grid-template-columns:250px minmax(0,1fr);flex:1;width:100%;max-width:1320px;margin:0 auto;align-items:start}
#side{position:sticky;top:65px;height:calc(100vh - 65px);overflow-y:auto;padding:18px 14px 40px;border-right:1px solid var(--line);background:var(--bg)}
#side a{display:block;text-decoration:none;color:var(--muted);padding:5px 10px;border-radius:8px;font-size:.92rem}
#side a:hover{color:var(--fg);background:var(--line)}
#side a.on{color:var(--fg);background:var(--line);font-weight:600}
#side a.sl{font-weight:600;color:var(--fg);margin-bottom:6px}
.sgroup{margin-top:16px}
.sgroup h4{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 4px 10px}
.nores{color:var(--muted);font-size:.9rem;padding:8px 10px}
.wrap{max-width:none;margin:0;padding:24px 32px 56px;min-width:0}
.wrap > .crumb, .wrap > .title, .wrap > .lead, .wrap > .panel, .wrap > .charts{max-width:1000px}
.hero{padding:28px 0 8px}
.hgroup{margin-top:34px}
.hgroup h2{font-size:1.15rem;margin:0 0 4px;letter-spacing:-.01em}
.hgroup .grid{margin-top:14px}
.hero + .hgroup{margin-top:20px}
.card{min-width:0}
@media (max-width:860px){
  .layout{grid-template-columns:1fr}
  .menu-btn{display:block;margin-left:0}
  .search{max-width:none;min-width:0}
  #side{position:fixed;top:65px;left:0;height:calc(100vh - 65px);width:290px;max-width:85vw;z-index:25;transform:translateX(-105%);transition:transform .2s ease;box-shadow:0 0 0 1px var(--line);display:block}
  #side.open{transform:none}
  .wrap{padding:20px 18px 48px}
}