/* Base reset */
html,body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}

/* Layout: dark "chaufferie" hero with a live manometer, then light working sections; sticky call bar on phones */
:root{
  --bg:#f3f5f8; --surface:#ffffff; --ink:#121a26; --muted:#556072; --line:#d9dee7;
  --night:#0f1724; --night-2:#18243a; --on-night:#e9eef6; --on-night-muted:#9fb0c8;
  --flame:#e8551e; --flame-ink:#ffffff; --flame-soft:#fde6db; --ok:#1f9d63; --cool:#2f6fd6;
  --f-display:"Archivo","Arial Narrow",system-ui,sans-serif;
  --f-body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --r:10px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0c121c; --surface:#141d2b; --ink:#e7ecf4; --muted:#9aa7ba; --line:#263247;
  --night:#070b12; --night-2:#111a29; --flame:#ff6a32; --flame-soft:#3a1d12; --cool:#6c9cf0; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0c121c; --surface:#141d2b; --ink:#e7ecf4; --muted:#9aa7ba; --line:#263247;
  --night:#070b12; --night-2:#111a29; --flame:#ff6a32; --flame-soft:#3a1d12; --cool:#6c9cf0; color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.6;padding-bottom:72px}
@media (min-width:860px){body{padding-bottom:0}}
.wrap{max-width:1160px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--f-display);line-height:1.05;text-wrap:balance;margin:0}
h2{font-size:clamp(1.9rem,4vw,2.8rem);font-weight:850;font-stretch:80%;letter-spacing:-.01em}
h3{font-size:1.2rem;font-weight:750;font-stretch:90%}
p{margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--flame);outline-offset:3px;border-radius:4px}
.eyebrow{font-family:var(--f-mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--flame);font-weight:700}
.btn{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;text-decoration:none;border-radius:999px;padding:.9rem 1.4rem;border:2px solid transparent;cursor:pointer;font:inherit;font-weight:700;transition:transform .15s}
.btn:hover{transform:translateY(-1px)}
.btn-flame{background:var(--flame);color:var(--flame-ink)}
.btn-ghost{border-color:currentColor;background:transparent;color:inherit}
.tel{font-family:var(--f-mono);font-weight:700;letter-spacing:.02em}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--night);color:var(--on-night);border-bottom:1px solid #ffffff14}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:21;background:var(--night)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:.7rem}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;font-family:var(--f-display);font-weight:850;font-stretch:85%;font-size:1.2rem;letter-spacing:.01em}
.brand svg{flex:none}
.nav{display:none;gap:1.4rem;font-size:.92rem;color:var(--on-night-muted)}
.nav a{text-decoration:none}.nav a:hover{color:var(--on-night)}
@media (min-width:960px){.nav{display:flex}}
.top .btn{padding:.55rem 1rem;font-size:.95rem}
.top .label-long{display:none}@media (min-width:560px){.top .label-long{display:inline}}

/* hero */
.hero{background:radial-gradient(1200px 500px at 85% 20%,#2a1a14 0%,transparent 60%),var(--night);color:var(--on-night);padding-block:3.5rem 4rem}
.hero .wrap{display:grid;gap:2.5rem;align-items:center}
@media (min-width:900px){.hero .wrap{grid-template-columns:1.25fr .9fr}}
.status{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--f-mono);font-size:.8rem;background:#ffffff10;border:1px solid #ffffff1f;border-radius:999px;padding:.35rem .8rem;color:var(--on-night)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 #1f9d6399;animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px #1f9d6300}100%{box-shadow:0 0 0 0 #1f9d6300}}
.hero h1{font-size:clamp(2.6rem,7vw,5rem);font-weight:900;font-stretch:72%;letter-spacing:-.01em;margin-top:1.2rem;text-transform:uppercase}
.hero h1 em{font-style:normal;color:var(--flame)}
.hero .lead{max-width:56ch;color:var(--on-night-muted);font-size:1.08rem;margin-top:1.1rem}
.hero .ctas{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.hero .btn-flame{font-size:1.15rem;padding:1rem 1.6rem}
.facts{display:flex;flex-wrap:wrap;gap:1.6rem 2.2rem;margin-top:2.2rem;padding-top:1.4rem;border-top:1px solid #ffffff1a}
.fact b{display:block;font-family:var(--f-display);font-stretch:80%;font-size:1.7rem;font-weight:850;color:var(--on-night)}
.fact span{font-size:.85rem;color:var(--on-night-muted)}

/* manometer */
.gauge-card{background:var(--night-2);border:1px solid #ffffff17;border-radius:18px;padding:1.4rem;max-width:420px;width:100%;justify-self:center}
.gauge-card svg{width:100%;height:auto;display:block}
.gauge-read{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;margin-top:.4rem}
.gauge-read .val{font-family:var(--f-mono);font-size:1.6rem;font-weight:700}
.gauge-read .verdict{font-size:.85rem;font-weight:700;padding:.25rem .6rem;border-radius:999px}
.v-ok{background:#1f9d6326;color:#5fd59c}.v-low{background:#e8551e2b;color:#ff9a70}.v-high{background:#2f6fd62e;color:#8fb4ff}
.gauge-card label{display:block;font-size:.85rem;color:var(--on-night-muted);margin-top:1rem}
.gauge-card input[type=range]{width:100%;accent-color:var(--flame);margin-top:.4rem}
.gauge-tip{font-size:.88rem;color:var(--on-night-muted);margin-top:.6rem;min-height:3.2em}

section{padding-block:4.5rem}
.sec-head{display:grid;gap:.7rem;margin-bottom:2.4rem;max-width:62ch}
.sec-head p{color:var(--muted)}

/* brands */
.brands{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.brand-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.4rem;display:grid;gap:.6rem;align-content:start}
.brand-card .name{font-family:var(--f-display);font-size:1.9rem;font-weight:900;font-stretch:75%;text-transform:uppercase;letter-spacing:.01em}
.brand-card p{color:var(--muted);font-size:.95rem}
.models{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.3rem}
.models span{font-family:var(--f-mono);font-size:.74rem;background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:.15rem .5rem;color:var(--ink)}
.also{margin-top:1.4rem;color:var(--muted);font-size:.95rem}

/* symptoms */
.symptoms{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.sym{background:var(--surface);padding:1.4rem;display:grid;gap:.5rem;align-content:start}
.sym .tag{justify-self:start;font-family:var(--f-mono);font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;padding:.2rem .55rem;border-radius:5px}
.t-urg{background:var(--flame-soft);color:var(--flame)}
.t-std{background:var(--bg);color:var(--muted);border:1px solid var(--line)}
.sym p{color:var(--muted);font-size:.95rem}

/* services */
.services{display:grid;gap:1.2rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.svc{border-top:3px solid var(--ink);padding-top:1rem;display:grid;gap:.5rem;align-content:start}
.svc.hot{border-top-color:var(--flame)}
.svc p{color:var(--muted);font-size:.95rem}
.svc ul{margin:.3rem 0 0;padding-left:1.1rem;color:var(--muted);font-size:.92rem}

/* process */
.dark{background:var(--night);color:var(--on-night)}
.dark .sec-head p{color:var(--on-night-muted)}
.steps{display:grid;gap:1.4rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));counter-reset:s;list-style:none;margin:0;padding:0}
.steps li{counter-increment:s;display:grid;gap:.5rem;align-content:start;padding-top:1rem;border-top:1px solid #ffffff26}
.steps li::before{content:"0" counter(s);font-family:var(--f-mono);color:var(--flame);font-weight:700;font-size:.9rem}
.steps p{color:var(--on-night-muted);font-size:.95rem}

/* zones */
.zones{display:grid;gap:1.4rem}
@media (min-width:880px){.zones{grid-template-columns:320px 1fr}}
.dept-list{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem;align-content:start}
.dept{font:inherit;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:.7rem .8rem;cursor:pointer;color:var(--ink);display:grid;gap:.1rem}
.dept b{font-family:var(--f-mono);font-size:1.1rem}
.dept span{font-size:.82rem;color:var(--muted)}
.dept[aria-pressed="true"]{border-color:var(--flame);box-shadow:inset 0 0 0 1px var(--flame)}
.dept[aria-pressed="true"] b{color:var(--flame)}
.dept-detail{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.6rem;min-width:0}
.dept-detail h3{font-size:1.7rem;font-stretch:80%}
.dept-detail .delay{font-family:var(--f-mono);font-size:.85rem;color:var(--ok);margin-top:.4rem}
.cities{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1.1rem}
.cities span{font-size:.88rem;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:.25rem .7rem}

/* faq */
.faq{display:grid;gap:.6rem;max-width:820px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.2rem}
.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--f-mono);color:var(--flame);font-size:1.2rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin-top:.7rem}

/* contact */
.contact{display:grid;gap:2rem}
@media (min-width:900px){.contact{grid-template-columns:1fr 1.1fr}}
.callbox{background:var(--flame);color:var(--flame-ink);border-radius:16px;padding:2rem;display:grid;gap:1rem;align-content:start}
.callbox .big{font-family:var(--f-mono);font-size:clamp(1.8rem,5vw,2.6rem);font-weight:700;letter-spacing:.02em;user-select:all}
.callbox .btn-ghost{justify-self:start}
.callbox small{opacity:.9}
form{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:1.6rem;display:grid;gap:1rem}
.row{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
form label{display:grid;gap:.3rem;font-size:.88rem;font-weight:600}
form input,form select,form textarea{font:inherit;padding:.7rem .8rem;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);width:100%}
form textarea{min-height:110px;resize:vertical}
.form-msg{font-size:.92rem;padding:.8rem 1rem;border-radius:8px;background:var(--flame-soft);color:var(--ink)}

footer{background:var(--night);color:var(--on-night-muted);padding-block:2.5rem;font-size:.9rem}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem}

/* mobile call bar */
.callbar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:var(--night);border-top:1px solid #ffffff1f;padding:.6rem max(16px,env(safe-area-inset-right,0px)) calc(.6rem + env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px));display:flex;gap:.6rem}
.callbar .btn{flex:1;justify-content:center;padding:.8rem}
@media (min-width:860px){.callbar{display:none}}