/* Abakivo – foglio di stile comune. Caratteri Space Grotesk e Inter (SIL Open Font License, vedi /fonts/OFL-*.txt), serviti dal sito. */
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:500;font-display:swap;src:url("/fonts/space-grotesk-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:700;font-display:swap;src:url("/fonts/space-grotesk-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"Inter";font-style:normal;font-weight:400;font-display:swap;src:url("/fonts/inter-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"Inter";font-style:normal;font-weight:500;font-display:swap;src:url("/fonts/inter-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"Inter";font-style:normal;font-weight:600;font-display:swap;src:url("/fonts/inter-latin-600-normal.woff2") format("woff2")}
:root{
  --bg:#F6F4EC; --surface:#FFFFFF; --ink:#13241D; --muted:#566A60; --line:#DAD9CC;
  --accent:#C8F05A; --accent-strong:#7DB800; --accent-ink:#3D6300; --up:#C2402A; --ok:#1B7F45; --ad:#7C8B91; --focus:#1D6FB8;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --cond:"Space Grotesk",system-ui,sans-serif;
  color-scheme:light; box-sizing:border-box;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0F1814; --surface:#17241E; --ink:#EEF3E8; --muted:#9FB3A8; --line:#2A3C33;
    --accent:#C8F05A; --accent-strong:#A6D82E; --accent-ink:#D9F58A; --up:#FF8A73; --ok:#7BE0A0; --ad:#7E9096; --focus:#6FB3F2;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0F1814; --surface:#17241E; --ink:#EEF3E8; --muted:#9FB3A8; --line:#2A3C33;
  --accent:#C8F05A; --accent-strong:#A6D82E; --accent-ink:#D9F58A; --up:#FF8A73; --ok:#7BE0A0; --ad:#7E9096; --focus:#6FB3F2;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.55}
a{color:var(--focus)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.site{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.brand{font-family:var(--cond);font-weight:700;font-size:26px;color:var(--ink);text-decoration:none}
.brand span{color:var(--accent-ink)}
.proto{background:var(--accent);color:#2B1D00;font-size:14px;font-weight:600;text-align:center;padding:6px 12px}
.ad{border:2px dashed var(--ad);color:var(--ad);display:flex;align-items:center;justify-content:center;text-align:center;font-size:13px;font-weight:500;padding:8px;margin:16px auto;border-radius:4px}
.ad.leader{max-width:728px;min-height:90px}.ad.rect{max-width:336px;min-height:280px}.ad.inline{max-width:728px;min-height:120px}
h1{font-family:var(--cond);font-weight:700;font-size:clamp(34px,6vw,52px);line-height:1.02;margin:24px 0 8px;max-width:20ch}
.lede{color:var(--muted);max-width:62ch;margin:0 0 24px}
.calc{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;align-items:start}
@media (max-width:820px){.calc{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:22px}
fieldset{border:0;margin:0 0 18px;padding:0;min-width:0}
legend{font-family:var(--cond);font-weight:600;font-size:21px;margin-bottom:8px}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg label{flex:1 1 120px;display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:8px;padding:10px 12px;cursor:pointer;background:var(--bg);font-weight:500}
.seg input{accent-color:var(--accent)}
.seg label:has(input:checked){border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.row{display:grid;grid-template-columns:1fr 152px;gap:12px;align-items:center;padding:8px 0;border-top:1px solid var(--line)}
.row label{font-weight:500}
.row small{display:block;color:var(--muted);font-weight:400;font-size:14px;line-height:1.35}
.row .err{display:block;grid-column:1 / -1;color:var(--up);font-size:14px;font-weight:600;margin-top:-2px}
.row .err:empty{display:none}
.num{display:flex;align-items:center;border:1px solid var(--line);border-radius:6px;background:var(--bg)}
.num:has(input[aria-invalid="true"]){border-color:var(--up);box-shadow:0 0 0 1px var(--up)}
.num input{width:100%;min-width:0;font:600 17px var(--sans);color:var(--ink);background:transparent;border:0;padding:8px 6px 8px 10px;text-align:right}
.num span{color:var(--muted);font-size:13px;padding-right:8px;white-space:nowrap}
select{width:100%;font:500 16px var(--sans);color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:9px 10px}
.hint{color:var(--muted);font-size:14px;margin:6px 0 0}
.hidden{display:none !important}
.result{position:sticky;top:16px}
.verdict{font-family:var(--cond);font-weight:700;font-size:26px;line-height:1.15;margin:0 0 10px}
.verdict.up{color:var(--up)} .verdict.ok{color:var(--ok)}
.big{font-family:var(--cond);font-weight:700;font-size:clamp(52px,9vw,80px);line-height:.95}
.big-label{color:var(--muted);margin:4px 0 18px}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.stat{border-top:2px solid var(--line);padding-top:6px}
.stat b{display:block;font-family:var(--cond);font-size:28px;font-weight:600}
.stat span{color:var(--muted);font-size:14px}
.note{font-size:16px;margin:14px 0 0;padding:12px 14px;border-left:4px solid var(--accent);background:var(--bg)}
.affiliate{border:2px dashed var(--accent);border-radius:8px;padding:14px 16px;margin-top:16px;font-size:15px}
.affiliate strong{display:block;font-family:var(--cond);font-size:20px}
.affiliate em{color:var(--muted);font-style:normal;font-size:13px}
article{max-width:68ch;margin:40px 0}
article h2{font-family:var(--cond);font-weight:700;font-size:32px;line-height:1.1;margin:36px 0 10px}
.formula{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;overflow-x:auto;font-size:16px}
table{border-collapse:collapse;width:100%;font-size:15px;margin:8px 0}
th,td{border-bottom:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
th{font-weight:600}
details{border-top:1px solid var(--line);padding:12px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{font-weight:600;cursor:pointer}
details p{margin:8px 0 0;color:var(--muted)}
.meta{color:var(--muted);font-size:14px}
footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:14px}

/* Spazi pubblicitari e di affiliazione: nascosti finché non sono attivi.
   Per attivarli: togliere la classe "off" dal contenitore (le misure minime restano riservate). */
.ad.off,.affiliate.off{display:none}
.proto{display:none}
nav.site a{color:var(--muted);text-decoration:none;font-weight:500;margin-left:16px}
nav.site a:hover{color:var(--ink)}
footer a{color:var(--muted)}
footer nav a{margin-right:16px}
.cards{display:grid;grid-template-columns:1fr;gap:16px;max-width:720px;margin:24px 0 40px}
.card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;color:var(--ink);text-decoration:none}
.card:hover{border-color:var(--accent)}
.card h2{font-family:var(--cond);font-size:26px;line-height:1.1;margin:0 0 6px}
.card p{margin:0;color:var(--muted)}
.card.soon{opacity:.6;pointer-events:none}
.tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent-ink);border:1px solid var(--accent);border-radius:99px;padding:1px 8px;margin-bottom:8px}
.page{max-width:68ch;margin:24px 0 40px}
.page h1{max-width:none}
.page h2{font-family:var(--cond);font-weight:700;font-size:28px;margin:28px 0 8px}

/* Classifica dei sistemi (strumento «scaldare una stanza») */
.checks{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.checks label{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:8px;padding:9px 12px;background:var(--bg);font-weight:500;cursor:pointer}
.checks input{accent-color:var(--accent)}
.checks label:has(input:checked){border-color:var(--accent)}
.fs-err{color:var(--up);font-size:14px;font-weight:600;margin:6px 0 0}
.fs-err:empty{display:none}
.rank{list-style:none;margin:0 0 6px;padding:0}
.rank li{display:grid;grid-template-columns:1fr auto;gap:2px 10px;padding:8px 0;border-top:1px solid var(--line)}
.rank li.off{display:none}
.rank .name{font-weight:600}
.rank .val{font-family:var(--cond);font-weight:600;font-size:22px;text-align:right}
.rank .sub{grid-column:1 / -1;color:var(--muted);font-size:14px}
.rank .bar{grid-column:1 / -1;height:8px;border-radius:4px;background:var(--line);overflow:hidden}
.rank .bar i{display:block;height:100%;background:var(--accent);width:0}
.rank li.best .name::after{content:"più economico";margin-left:8px;font-size:12px;font-weight:600;color:var(--ok);border:1px solid var(--ok);border-radius:99px;padding:0 7px;vertical-align:2px}
.rank li.best .bar i{background:var(--ok)}

/* Sezione richiudibile nel modulo e link tra strumenti */
form details.adv{border:1px solid var(--line);border-radius:8px;padding:0 12px;margin:0 0 12px;background:var(--surface)}
form details.adv:last-of-type{border-bottom:1px solid var(--line)}
form details.adv>summary{padding:12px 0;font-family:var(--cond);font-size:20px;font-weight:600}
form details.adv>summary span{display:block;font-family:var(--sans);font-size:14px;font-weight:400;color:var(--muted)}
form details.adv[open]>summary{border-bottom:1px solid var(--line);margin-bottom:10px}
ul.related{padding-left:20px}
ul.related li{margin:6px 0;color:var(--muted)}
ul.related a{font-weight:600;margin-right:4px}

/* Cursori (strumento ricarica) */
.slider{grid-column:1 / -1;display:flex;align-items:center;gap:12px}
.slider input{flex:1;accent-color:var(--accent)}
.slider output{font:600 17px var(--sans);min-width:4ch;text-align:right}

/* Palette viva (proposta 31/10/2026): scheda dei risultati scura con numeri in evidenza, selezioni nette, etichette piene */
.result .panel{--bg:#1B3328;--surface:#10231A;--ink:#F4F3EC;--muted:#A9BDB2;--line:#2E4A3B;--up:#FF8A73;--ok:#7BE0A0;background:#10231A;color:#F4F3EC;border-color:#10231A;border-radius:16px;padding:26px}
.result .panel .big{color:var(--accent)}
.result .panel .stat b{color:#fff}
.seg label:has(input:checked),.checks label:has(input:checked){border-color:var(--ink);background:var(--accent);box-shadow:none}
.tag{background:var(--accent);border-color:var(--accent);color:#13241D}
.card{border-radius:16px}
.card:hover{border-color:var(--ink);transform:translateY(-2px);transition:transform .15s}
@media (prefers-reduced-motion:reduce){.card:hover{transform:none;transition:none}}
.panel{border-radius:16px}
.rank .bar i{background:var(--accent-strong)}