/* Alpha Aquecedores — identidade: papel creme, petróleo, cobre. Fonte única: Archivo (largura + peso variáveis). */
:root{
  --ink:#1E2124; --ink-2:#2D3237; --copper:#E30A0A; --copper-2:#FF4A3D; --copper-ink:#B80D0D;
  --paper:#F5F4F2; --paper-2:#E9E7E4; --white:#FFFFFF; --steel:#9AA0A5; --line:rgba(30,33,36,.16);
  --wa:#1FA855;
  --wrap:1180px; --gut:clamp(18px,4vw,40px);
  --f:'Archivo',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.62 var(--f);font-stretch:100%;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--f);font-stretch:70%;font-weight:800;line-height:1.02;letter-spacing:-.005em;margin:0 0 .5em;text-transform:uppercase;text-wrap:balance}
h1{font-size:clamp(2.3rem,5.6vw,4.7rem)}
h2{font-size:clamp(2rem,4.6vw,3.4rem)}
h3{font-size:clamp(1.35rem,2.2vw,1.7rem);font-stretch:78%}
p{margin:0 0 1em;text-wrap:pretty}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:3px solid var(--copper);outline-offset:3px}

/* utilitária */
.topbar{background:var(--ink);color:#E1E3E5;font-size:.82rem;font-stretch:90%;letter-spacing:.02em}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px;padding-top:8px;padding-bottom:8px;flex-wrap:wrap}
.topbar a{text-decoration:none;font-weight:600;color:#fff}
.topbar span.dot{color:var(--copper-2);margin:0 .5em}

/* header */
.hdr{position:sticky;top:0;z-index:100;background:rgba(245,244,242,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand img{width:38px;height:38px}
.brand b{display:block;font-stretch:68%;font-weight:900;font-size:1.7rem;line-height:.9;letter-spacing:.02em}
.brand small{display:block;font-stretch:110%;font-weight:600;font-size:.62rem;letter-spacing:.32em;color:var(--copper-ink);margin-top:3px}
.nav{display:flex;align-items:center;gap:clamp(14px,2vw,28px)}
.nav a{text-decoration:none;font-weight:600;font-size:.93rem;font-stretch:95%;position:relative;padding:6px 0}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--copper);transform:scaleX(0);transform-origin:left;transition:transform .25s}
.nav a:hover::after,.nav a[aria-current]::after{transform:scaleX(1)}
.btn{display:inline-flex;align-items:center;gap:10px;font:700 1rem/1 var(--f);font-stretch:92%;letter-spacing:.01em;text-decoration:none;padding:15px 24px;border-radius:3px;border:2px solid var(--ink);background:var(--ink);color:#fff;transition:transform .15s,background .2s,color .2s;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn svg{width:20px;height:20px;flex:none}
.btn.wa{background:var(--wa);border-color:var(--wa);color:#fff}
.btn.wa:hover{background:#178a46;border-color:#178a46}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:#fff}
.btn.sm{padding:11px 16px;font-size:.9rem}
.btn.dark{background:var(--ink);border-color:var(--ink)}
.menu-btn{display:none;background:none;border:2px solid var(--ink);border-radius:3px;width:46px;height:46px;cursor:pointer;padding:0;align-items:center;justify-content:center}
.menu-btn i{display:block;width:20px;height:2px;background:var(--ink);position:relative}
.menu-btn i::before,.menu-btn i::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink)}
.menu-btn i::before{top:-6px}.menu-btn i::after{top:6px}

/* hero */
.hero{position:relative;padding:clamp(40px,7vw,84px) 0 clamp(48px,7vw,90px);overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(24px,5vw,72px);align-items:center}
.kicker{display:inline-flex;align-items:center;gap:12px;font-stretch:112%;font-weight:700;font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;color:var(--copper-ink);margin-bottom:22px}
.kicker::before{content:"";width:34px;height:2px;background:var(--copper)}
.hero h1 em{font-style:normal;color:var(--copper)}
.hero .lead{font-size:clamp(1.05rem,1.6vw,1.25rem);max-width:34em;margin:22px 0 30px;color:#33383D}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.hero-points{list-style:none;padding:0;margin:34px 0 0;display:flex;flex-wrap:wrap;gap:10px 26px;font-weight:600;font-size:.95rem;font-stretch:95%}
.hero-points li{display:flex;align-items:center;gap:9px}
.hero-points li::before{content:"";width:9px;height:9px;background:var(--copper);transform:rotate(45deg)}
.hero-art{position:relative;aspect-ratio:1/1.02;max-width:480px;margin-left:auto;width:100%}
.hero-art .disc{position:absolute;inset:6% 4% 8% 6%;border-radius:50%;background:var(--copper)}
.hero-art .ring{position:absolute;inset:0;border-radius:50%;border:2px solid var(--ink);transform:rotate(-8deg) scale(.98)}
.hero-art img.main{position:absolute;left:14%;top:9%;width:72%;height:auto;aspect-ratio:1/.82;object-fit:contain;background:#fff;border:2px solid var(--ink);padding:16px;box-shadow:10px 10px 0 var(--ink)}
.hero-art .chip{position:absolute;background:var(--white);border:2px solid var(--ink);padding:9px 14px;font-weight:700;font-stretch:90%;font-size:.88rem;line-height:1.1;box-shadow:5px 5px 0 var(--ink)}
.hero-art .chip small{display:block;font-weight:500;font-size:.72rem;color:#565B60;margin-top:2px}
.chip.c1{left:-2%;bottom:20%}.chip.c2{right:-2%;top:18%}.chip.c3{right:6%;bottom:4%}

/* faixa */
.strip{background:var(--ink);color:#fff;overflow:hidden;border-block:3px solid var(--copper)}
.strip ul{list-style:none;margin:0;padding:0;display:flex;gap:0;white-space:nowrap;animation:slide 38s linear infinite;width:max-content}
.strip li{font-stretch:72%;font-weight:800;text-transform:uppercase;font-size:1.25rem;letter-spacing:.06em;padding:16px 28px;display:flex;align-items:center;gap:28px}
.strip li::after{content:"";width:8px;height:8px;background:var(--copper-2);transform:rotate(45deg)}
@keyframes slide{to{transform:translateX(-50%)}}

/* seções */
.sec{padding:clamp(56px,9vw,112px) 0}
.sec.alt{background:var(--paper-2)}
.sec.dark{background:var(--ink);color:#EEEFF0}
.sec.dark .kicker{color:var(--copper-2)}
.sec.dark .kicker::before{background:var(--copper-2)}
.sec-head{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,5vw,72px);align-items:end;margin-bottom:clamp(32px,5vw,56px)}
.sec-head p{margin:0;max-width:38em}
.sec-head h2{margin:0}

/* equipamentos */
.grid-eq{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--white);border:2px solid var(--ink);display:flex;flex-direction:column;text-decoration:none;transition:transform .2s,box-shadow .2s;position:relative}
.card:hover{transform:translate(-4px,-4px);box-shadow:8px 8px 0 var(--copper)}
.card .pic{background:var(--paper-2);border-bottom:2px solid var(--ink);padding:22px;display:grid;place-items:center;aspect-ratio:1/.8}
.card .pic img{height:100%;width:auto;max-height:190px}
.card .body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:8px;flex:1}
.card .num{font-stretch:112%;font-weight:700;font-size:.72rem;letter-spacing:.18em;color:var(--copper-ink)}
.card h3{margin:0}
.card p{margin:0;color:#3F4449;font-size:.97rem}
.card .more{margin-top:auto;padding-top:12px;font-weight:700;font-stretch:92%;display:flex;gap:8px;align-items:center}
.card .more::after{content:"→";transition:transform .2s}
.card:hover .more::after{transform:translateX(5px)}

/* serviços */
.svc-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;column-gap:clamp(24px,5vw,72px)}
.svc-list li{display:grid;grid-template-columns:64px 1fr;gap:6px 14px;padding:26px 0;border-top:1px solid rgba(255,255,255,.22)}
.light .svc-list li{border-top-color:var(--line)}
.svc-list .n{font-stretch:68%;font-weight:900;font-size:2.6rem;line-height:.9;color:var(--copper-2)}
.light .svc-list .n{color:var(--copper)}
.svc-list h3{margin:0 0 6px}
.svc-list p{margin:0;opacity:.86;font-size:.98rem}

/* marcas */
.brands{display:grid;grid-template-columns:repeat(6,1fr);border-top:2px solid var(--ink);border-left:2px solid var(--ink)}
.brands a,.brands span{display:grid;place-items:center;text-align:center;min-height:92px;padding:14px 10px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);font-stretch:70%;font-weight:800;text-transform:uppercase;font-size:1.35rem;letter-spacing:.04em;text-decoration:none;background:var(--white);transition:background .2s,color .2s}
.brands a:hover{background:var(--ink);color:#fff}
.brands span{background:transparent;color:#52575C}
.note{font-size:.85rem;color:#565B60;margin-top:18px}

/* passos */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;counter-reset:s;border-top:2px solid var(--ink)}
.steps li{list-style:none;padding:28px 28px 30px 0;position:relative}
.steps li+li{padding-left:28px;border-left:1px solid var(--line)}
.steps li::before{counter-increment:s;content:"0" counter(s);font-stretch:68%;font-weight:900;font-size:3.4rem;line-height:1;color:var(--copper);display:block;margin-bottom:10px}
.steps h3{margin-bottom:8px}
.steps p{margin:0}
.steps{padding:0;margin:0}

/* por que */
.why{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(28px,6vw,90px);align-items:start}
.checks{list-style:none;margin:0;padding:0;display:grid;gap:0}
.checks li{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.2);font-weight:500}
.checks li::before{content:"";width:22px;height:22px;margin-top:2px;background:var(--copper-2);clip-path:polygon(14% 52%,0 66%,38% 100%,100% 22%,86% 8%,38% 70%)}
.checks b{display:block;font-stretch:80%;text-transform:uppercase;font-size:1.2rem;font-weight:800;letter-spacing:.01em}

/* FAQ */
.faq{max-width:860px}
.faq details{border-top:2px solid var(--ink);padding:0}
.faq details:last-child{border-bottom:2px solid var(--ink)}
.faq summary{list-style:none;cursor:pointer;padding:22px 48px 22px 0;font-stretch:78%;font-weight:800;text-transform:uppercase;font-size:clamp(1.15rem,2vw,1.4rem);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:2rem;font-weight:400;color:var(--copper);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq details p{padding:0 48px 24px 0;margin:0;color:#34393E}

/* regiões */
.areas{display:flex;flex-wrap:wrap;gap:10px}
.areas li{list-style:none;border:2px solid var(--ink);padding:9px 16px;font-weight:600;font-stretch:92%;background:var(--white)}
.areas{padding:0;margin:0}

/* CTA final */
.cta-band{background:var(--copper);color:var(--ink);padding:clamp(48px,7vw,84px) 0}
.cta-band .wrap{display:grid;grid-template-columns:1.3fr .7fr;gap:30px;align-items:center}
.cta-band h2{margin:0;color:var(--ink)}
.cta-band p{margin:12px 0 0;font-weight:500;font-size:1.1rem;max-width:32em}
.cta-band .cta-row{justify-content:flex-end}
.cta-band .btn.ghost{border-color:var(--ink)}

/* páginas internas */
.page-hero{padding:clamp(36px,6vw,72px) 0 clamp(32px,5vw,56px);border-bottom:1px solid var(--line)}
.crumbs{font-size:.84rem;font-stretch:92%;margin-bottom:26px;color:#565B60}
.crumbs a{text-decoration:none;font-weight:600;color:var(--ink)}
.crumbs a:hover{color:var(--copper)}
.crumbs span{margin:0 .5em;color:var(--copper)}
.page-hero .grid{display:grid;grid-template-columns:1.25fr .75fr;gap:clamp(24px,5vw,64px);align-items:center}
.page-hero h1{font-size:clamp(2.3rem,5.6vw,4.4rem)}
.page-hero .lead{font-size:1.15rem;color:#33383D;max-width:36em}
.page-hero .art{background:var(--paper-2);border:2px solid var(--ink);padding:28px;display:grid;place-items:center;aspect-ratio:1/1;max-width:340px;margin-left:auto;width:100%;box-shadow:10px 10px 0 var(--copper)}
.page-hero .art img{width:78%}
.two{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,6vw,80px)}
.two h2{font-size:clamp(1.8rem,3.6vw,2.7rem)}
.prose p{max-width:40em}
.tick{list-style:none;padding:0;margin:0}
.tick li{padding:14px 0 14px 34px;border-bottom:1px solid var(--line);position:relative}
.tick li::before{content:"";position:absolute;left:0;top:19px;width:16px;height:16px;background:var(--copper);clip-path:polygon(14% 52%,0 66%,38% 100%,100% 22%,86% 8%,38% 70%)}
.tick b{font-weight:700}
.alert{border:2px solid var(--ink);border-left:10px solid var(--copper);background:var(--white);padding:18px 22px;margin-top:28px}
.alert b{font-stretch:80%;text-transform:uppercase;font-weight:800;font-size:1.05rem;display:block;margin-bottom:4px}
.alert p{margin:0;font-size:.96rem}
.mini-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.mini-links a{border:2px solid var(--ink);padding:8px 14px;text-decoration:none;font-weight:600;font-stretch:92%;font-size:.92rem;background:var(--white)}
.mini-links a:hover{background:var(--ink);color:#fff}

/* contato */
.contact{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,6vw,80px);align-items:start}
.contact .big{font-stretch:68%;font-weight:900;font-size:clamp(2.4rem,6vw,4rem);line-height:1;display:block;text-decoration:none;margin:4px 0 8px}
.form{background:var(--white);border:2px solid var(--ink);padding:clamp(20px,3vw,34px);box-shadow:10px 10px 0 var(--copper);display:grid;gap:16px}
.form label{display:grid;gap:6px;font-weight:700;font-stretch:92%;font-size:.92rem}
.form input,.form select,.form textarea{font:400 1rem var(--f);padding:13px 14px;border:2px solid var(--ink);border-radius:2px;background:var(--paper);color:var(--ink);width:100%}
.form textarea{min-height:110px;resize:vertical}
.form .two-f{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* rodapé */
.ftr{background:var(--ink);color:#CFD2D5;padding:clamp(48px,7vw,80px) 0 28px;font-size:.95rem}
.ftr .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:clamp(24px,4vw,56px)}
.ftr h4{font-stretch:100%;font-size:.74rem;letter-spacing:.2em;color:var(--copper-2);margin-bottom:14px;font-weight:700}
.ftr ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.ftr a{text-decoration:none}
.ftr a:hover{color:#fff;text-decoration:underline}
.ftr .brand b{color:#fff}.ftr .brand small{color:var(--copper-2)}
.ftr .brand img{filter:none}
.ftr .legal{border-top:1px solid rgba(255,255,255,.16);margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.8rem;color:#A7ABAF}
.ftr .about{max-width:30em;margin-top:16px}

/* whatsapp flutuante */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:120;display:flex;align-items:center;gap:10px;background:var(--wa);color:#fff;text-decoration:none;font-weight:700;font-stretch:92%;padding:14px 20px 14px 16px;border-radius:999px;box-shadow:0 8px 24px rgba(30,33,36,.35);transition:transform .2s}
.wa-float:hover{transform:translateY(-3px)}
.wa-float svg{width:26px;height:26px}

/* revelar */
.js .rv{opacity:0;transform:translateY(22px);transition:opacity .7s,transform .7s}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.strip ul{animation:none}.js .rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* responsivo */
@media (max-width:980px){
  .menu-btn{display:inline-flex}
  .nav{position:fixed;inset:72px 0 auto 0;background:var(--paper);flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gut) 24px;border-bottom:2px solid var(--ink);transform:translateY(-130%);transition:transform .3s;max-height:calc(100vh - 72px);overflow:auto;z-index:99}
  .nav.open{transform:none}
  .nav a{padding:16px 0;border-bottom:1px solid var(--line);font-size:1.05rem}
  .nav a::after{display:none}
  .nav .btn{margin-top:16px;justify-content:center}
  .hero .wrap,.page-hero .grid,.why,.two,.contact,.sec-head,.cta-band .wrap{grid-template-columns:1fr}
  .hero-art{margin:10px auto 0;max-width:400px}
  .page-hero .art{margin:0;max-width:260px}
  .grid-eq{grid-template-columns:1fr 1fr}
  .brands{grid-template-columns:repeat(3,1fr)}
  .cta-band .cta-row{justify-content:flex-start}
  .ftr .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:16px}
  .topbar .wrap{justify-content:center;text-align:center}
  .topbar .hide-s{display:none}
  .grid-eq{grid-template-columns:1fr}
  .svc-list{grid-template-columns:1fr}
  .svc-list li{grid-template-columns:52px 1fr}
  .brands{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .steps li+li{padding-left:0;border-left:0;border-top:1px solid var(--line)}
  .form .two-f{grid-template-columns:1fr}
  .ftr .cols{grid-template-columns:1fr}
  .hero-art .chip{font-size:.78rem;padding:7px 10px}
  .chip.c1{left:0}.chip.c2{right:0}
  .wa-float span{display:none}
  .wa-float{padding:14px}
  .btn{width:100%;justify-content:center}
  .cta-row .btn{width:100%}
}

/* fotos reais de produto */
.card .pic{padding:14px}
.card .pic img{mix-blend-mode:multiply;width:100%;height:100%;max-height:none;object-fit:contain}
.page-hero .art{padding:18px}
.page-hero .art img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.page-hero .art.word{background:var(--ink);box-shadow:10px 10px 0 var(--copper)}
.page-hero .art.word span{font-stretch:62%;font-weight:900;color:var(--paper);font-size:clamp(2.6rem,7vw,4.4rem);line-height:.95;text-align:center;letter-spacing:.02em}
.gal{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.gal figure{margin:0;background:var(--white);border:2px solid var(--ink)}
.gal .ph{aspect-ratio:1/1;display:grid;place-items:center;padding:16px;border-bottom:2px solid var(--ink)}
.gal .ph img{width:100%;height:100%;object-fit:contain}
.gal figcaption{padding:14px 18px 18px;display:grid;gap:2px}
.gal figcaption b{font-stretch:80%;text-transform:uppercase;font-weight:800;font-size:1.1rem}
.gal figcaption span{font-size:.8rem;color:#565B60}

.card .pic{aspect-ratio:auto;height:230px;padding:16px}
.hero-art img.main{aspect-ratio:1/.82;padding:22px}
.card .pic{position:relative;display:block}
.card .pic img{position:absolute;inset:16px;width:calc(100% - 32px);height:calc(100% - 32px)}
.page-hero .art{position:relative;display:block}
.page-hero .art img{position:absolute;inset:18px;width:calc(100% - 36px);height:calc(100% - 36px)}
.page-hero .art.word{display:grid;place-items:center}
.gal{grid-template-columns:repeat(auto-fill,minmax(240px,300px))}
.gal .ph{position:relative;display:block}
.gal .ph img{position:absolute;inset:16px;width:calc(100% - 32px);height:calc(100% - 32px)}
/* logos de marcas */
.brands .lg{padding:18px 22px}
.brands .lg img{max-height:46px;max-width:100%;width:auto;height:auto;object-fit:contain}
.brands a.lg:hover{background:var(--paper-2)}
.brands span.lg{background:var(--white)}
.brands .lg img[src$="rheem.svg"]{max-height:68px}
.brands .lg img[src$="rowa.webp"]{max-height:56px}
.brands .lg img[src$="harman.webp"],.brands .lg img[src$="cumulus.webp"]{max-height:56px}
.brands .lg img[src$="orbis.webp"]{max-height:44px;max-width:150px}
.brands .lg img[src$="heliodin.webp"]{max-height:52px}
.brands .lg img{mix-blend-mode:multiply}

/* logo oficial */
.brand img{width:auto;height:46px;display:block}
.ftr .brand img{height:52px}
@media(max-width:560px){.brand img{height:38px}}
.cta-band{color:#fff}
.cta-band h2{color:#fff}
.cta-band .btn.ghost{border-color:#fff;color:#fff}
.cta-band .btn.ghost:hover{background:#fff;color:var(--copper-ink)}
.ftr .addr{color:#A7ABAF;line-height:1.5;margin-top:8px}