/* ===== Blog Calculadora de BTU — mesmo visual do calculabtu.com.br ===== */
:root{
  color-scheme:light;
  --bg:#FFFFFF; --ink:#12161C; --text:#2B313A; --muted:#6F7782; --line:#E9ECF0; --soft:#F5F7FA;
  --accent:#1C7CF2; --accent-soft:#EAF3FE; --deep:#0A2F6B; --sun:#F29A1C; --gold:#FFC53D;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{background:var(--bg);margin:0}
body{color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%;height:auto}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* ===== topo ===== */
.topo{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topo-in{max-width:1080px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.marca{display:flex;align-items:center;gap:10px;font-weight:800;font-size:15px;letter-spacing:-.01em;text-decoration:none;color:var(--ink)}
.marca svg{width:32px;height:32px;flex:none}
.nav{display:flex;align-items:center;gap:4px}
.nav a{font-size:14px;font-weight:700;text-decoration:none;color:var(--ink);padding:8px 12px;border-radius:999px}
.nav a:hover{background:var(--soft)}
.nav a[aria-current="page"]{background:var(--accent-soft);color:var(--accent)}
.nav a.cta{background:var(--accent);color:#fff}
.nav a.cta:hover{background:var(--deep)}
@media (max-width:560px){.marca span{display:none}.nav a{padding:8px 10px;font-size:13px}}

/* ===== capa do blog ===== */
.capa{background:radial-gradient(110% 90% at 50% 0%,#DCEBFD 0%,#EEF5FE 45%,#fff 85%);padding:48px 16px 28px;text-align:center}
.capa-in{max-width:760px;margin:0 auto;display:grid;gap:12px;justify-items:center}
.kicker{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.capa h1{margin:0;font-size:clamp(28px,5.4vw,44px);font-weight:800;letter-spacing:-.03em;line-height:1.1;text-wrap:balance}
.capa p{margin:0;color:var(--muted);font-size:17px;text-wrap:balance}

.cats{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:10px}
.cat{font:inherit;font-size:14px;font-weight:700;padding:8px 14px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}
.cat:hover{border-color:#cfd3d9}
.cat[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}

/* ===== lista de posts ===== */
.lista{max-width:1080px;margin:0 auto;padding:24px 16px 56px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
@media (max-width:900px){.lista{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.lista{grid-template-columns:minmax(0,1fr)}}
.post-card{display:grid;grid-template-rows:auto 1fr;border:1.5px solid var(--line);border-radius:20px;overflow:hidden;background:#fff;text-decoration:none;color:var(--ink);transition:transform .15s,box-shadow .2s,border-color .2s}
.post-card:hover{transform:translateY(-3px);border-color:#CFE2FB;box-shadow:0 14px 30px rgba(28,124,242,.14)}
.post-card .img{aspect-ratio:16/9;display:grid;place-items:center;background:linear-gradient(135deg,#1C7CF2 0%,#0A2F6B 100%);color:#fff}
.post-card .img svg{width:38%;height:auto;opacity:.95}
.post-card .img img{width:100%;height:100%;object-fit:cover}
.post-card .txt{padding:16px 18px 18px;display:grid;gap:8px;align-content:start}
.post-card .tag{font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.post-card h2{margin:0;font-size:18px;font-weight:800;letter-spacing:-.015em;line-height:1.3}
.post-card p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.5}
.post-card .meta{font-size:12.5px;color:var(--muted);font-weight:600}
.post-card.destaque{grid-column:1/-1;grid-template-columns:1.1fr 1fr;grid-template-rows:auto}
.post-card.destaque .img{aspect-ratio:auto;min-height:240px}
.post-card.destaque .txt{padding:28px;align-content:center}
.post-card.destaque h2{font-size:clamp(22px,3vw,28px)}
@media (max-width:760px){.post-card.destaque{grid-template-columns:minmax(0,1fr)}.post-card.destaque .img{min-height:180px}}
.vazio{grid-column:1/-1;text-align:center;color:var(--muted)}

/* ===== post ===== */
.post-topo{background:radial-gradient(110% 90% at 50% 0%,#DCEBFD 0%,#EEF5FE 50%,#fff 90%);padding:32px 16px 20px}
.post-topo-in{max-width:760px;margin:0 auto;display:grid;gap:12px}
.migalhas{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px}
.migalhas a{color:var(--muted);text-decoration:none}
.migalhas a:hover{color:var(--accent)}
.post-topo h1{margin:0;font-size:clamp(28px,5.4vw,42px);font-weight:800;letter-spacing:-.03em;line-height:1.12;text-wrap:balance}
.post-topo .resumo{margin:0;font-size:18px;color:var(--text)}
.post-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:13px;color:var(--muted);font-weight:600}

.conteudo{max-width:760px;margin:0 auto;padding:12px 16px 40px;font-size:17px;color:var(--text)}
.conteudo h2{margin:40px 0 12px;font-size:clamp(22px,3.4vw,27px);font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--ink)}
.conteudo h3{margin:28px 0 8px;font-size:19px;font-weight:800;color:var(--ink)}
.conteudo p{margin:0 0 16px}
.conteudo ul,.conteudo ol{margin:0 0 16px;padding-left:22px}
.conteudo li{margin:4px 0}
.conteudo strong{color:var(--ink)}
.conteudo .tabela-wrap{overflow-x:auto;border:1.5px solid var(--line);border-radius:16px;margin:8px 0 20px}
.conteudo table{width:100%;border-collapse:collapse;font-size:15px}
.conteudo th,.conteudo td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.conteudo th{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--soft);white-space:normal}
.conteudo tr:last-child td{border-bottom:0}
.conteudo td:first-child{font-weight:800;color:var(--ink)}
.dica{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:16px 18px;border-radius:16px;background:var(--accent-soft);margin:20px 0;font-size:16px}
.dica .ico{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--accent);color:#fff;font-weight:800}
.dica p{margin:0}
.dica.alerta{background:#FFF7E0}
.dica.alerta .ico{background:var(--gold);color:#3B2A00}

/* ===== calculadora dentro do post ===== */
.calc-mini{margin:28px 0;border-radius:22px;padding:22px;background:radial-gradient(90% 70% at 50% 0%,#2F86F5 0%,rgba(47,134,245,0) 70%),linear-gradient(180deg,#1453B8 0%,var(--deep) 100%);color:#fff}
.calc-mini h3{margin:0 0 4px;font-size:20px;font-weight:800;color:#fff;letter-spacing:-.01em}
.calc-mini .sub{margin:0 0 16px;font-size:14px;color:rgba(255,255,255,.8)}
.cm-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
@media (max-width:620px){.cm-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.cm-campo{display:grid;gap:4px}
.cm-campo label{font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--gold)}
.cm-campo input,.cm-campo select{font:inherit;font-size:16px;font-weight:700;width:100%;padding:10px 12px;border-radius:12px;border:0;background:#fff;color:var(--ink)}
.cm-sol{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.cm-sol button{font:inherit;font-size:13.5px;font-weight:700;padding:8px 13px;border-radius:999px;border:1px solid rgba(255,255,255,.3);background:rgba(3,20,52,.3);color:#fff;cursor:pointer}
.cm-sol button[aria-pressed="true"]{background:var(--sun);border-color:var(--sun)}
.cm-res{margin-top:16px;background:#fff;color:var(--ink);border-radius:16px;padding:14px 16px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px}
.cm-res .num{font-size:30px;font-weight:800;letter-spacing:-.03em;line-height:1}
.cm-res .num small{font-size:13px;font-weight:600;color:var(--muted);letter-spacing:0;margin-left:4px}
.cm-res .rec{font-size:14px;font-weight:700;color:var(--accent);background:var(--accent-soft);padding:8px 12px;border-radius:999px}
.cm-res .conta{flex-basis:100%;font-size:13.5px;color:var(--muted)}
.cm-res .conta b{color:var(--ink)}
.cm-acoes{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.cm-acoes a{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:800;text-decoration:none;padding:10px 16px;border-radius:999px}
.cm-acoes .a1{background:var(--gold);color:#3B2A00}
.cm-acoes .a2{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.3)}

/* ===== produtos dentro do post ===== */
.produtos-post{margin:28px 0;scroll-margin-top:80px}
.produtos-post .pp-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:6px 12px;margin-bottom:12px}
.produtos-post .pp-head h3{margin:0;font-size:19px;font-weight:800;color:var(--ink)}
.produtos-post .pp-head a{font-size:14px;font-weight:700;text-decoration:none}
.pp-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:700px){.pp-grid{grid-template-columns:minmax(0,1fr)}}
.pp-card{position:relative;display:grid;grid-template-columns:64px 1fr;grid-template-rows:auto auto;gap:6px 12px;padding:12px;border:1.5px solid var(--line);border-radius:18px;background:#fff}
.pp-card.top{border-color:var(--gold);box-shadow:0 0 0 1.5px var(--gold)}
.pp-card .ribbon{position:absolute;top:-10px;left:12px;font-size:11px;font-weight:800;padding:3px 9px;border-radius:999px;background:var(--gold);color:#3B2A00}
.pp-card .thumb{width:64px;height:64px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;overflow:hidden;background:#fff}
.pp-card .thumb img{width:100%;height:100%;object-fit:contain;padding:4px}
.pp-card .thumb svg{width:60%}
.pp-card .i{min-width:0;display:grid;gap:3px;align-content:start}
.pp-card .i .t{font-size:10.5px;font-weight:800;color:var(--accent);letter-spacing:.04em}
.pp-card .i h4{margin:0;font-size:13.5px;line-height:1.3;font-weight:700;color:var(--ink);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.pp-card .i .p{font-size:16px;font-weight:800;color:var(--ink)}
.pp-card .btn{grid-column:1/-1;display:block;text-align:center;white-space:nowrap;text-decoration:none;font-weight:800;font-size:13px;padding:10px 6px;border-radius:12px;background:var(--ink);color:#fff}
.pp-card .btn.loja-ml{background:#FFE600;color:#2D3277}
.pp-card .btn.loja-amz{background:#131921;color:#fff}
.pp-card .btn.loja-amz b{color:#FF9900}
.pp-disc{font-size:12px;color:var(--muted);margin:10px 0 0}

/* ===== chamada para a calculadora ===== */
.cta-calc{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 20px;margin:32px 0;padding:18px 20px;border-radius:18px;border:2px solid #CFE2FB;background:#fff;box-shadow:0 8px 22px rgba(28,124,242,.1)}
.cta-calc p{margin:0;font-size:16px;font-weight:700;color:var(--ink)}
.cta-calc p span{display:block;font-size:14px;font-weight:500;color:var(--muted)}
.cta-calc a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;font-weight:800;font-size:14px;padding:11px 18px;border-radius:999px;background:var(--accent);color:#fff}
.cta-calc a:hover{background:var(--deep)}

/* ===== perguntas frequentes ===== */
.faq{display:grid;gap:8px;margin:12px 0 20px}
.faq details{border:1.5px solid var(--line);border-radius:14px;padding:12px 14px}
.faq summary{cursor:pointer;font-weight:700;font-size:15.5px;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-weight:800;font-size:18px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:8px 0 0;font-size:15.5px}

/* ===== leia também e rodapé ===== */
.relacionados{max-width:1080px;margin:0 auto;padding:8px 16px 48px}
.relacionados h2{font-size:22px;font-weight:800;letter-spacing:-.02em;margin:0 0 14px}
.relacionados .lista{padding:0}
.rodape{border-top:1px solid var(--line);padding:28px 16px 36px;text-align:center;font-size:13px;color:var(--muted)}
.rodape a{color:var(--muted);font-weight:700}
.rodape p{margin:4px 0}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

.curto{display:none}
@media (max-width:560px){.longo{display:none}.curto{display:inline}}

/* ===== anúncios laterais ===== */
.lateral{position:fixed;top:84px;z-index:15;display:flex;flex-direction:column;gap:10px;transition:opacity .25s}
.lateral.troca{opacity:0}
.lateral .lrotulo,.lateral .lnota{font-size:10px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#8A919B;text-align:center}
.lateral .lnota{letter-spacing:.04em;text-transform:none;font-weight:600}
.lcard{display:flex;flex-direction:column;gap:5px;padding:10px;border-radius:16px;background:#fff;border:1.5px solid #E9ECF0;box-shadow:0 8px 22px rgba(10,47,107,.10);text-decoration:none;color:#12161C;transition:transform .15s,box-shadow .15s}
.lcard:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(10,47,107,.18)}
.lcard .lfoto{height:96px;display:grid;place-items:center;border-radius:10px;overflow:hidden;background:#fff}
.lcard .lfoto img{width:100%;height:100%;object-fit:contain}
.lcard .lfoto svg{width:60%}
.lcard .ltam{font-size:10.5px;font-weight:800;color:#1C7CF2;letter-spacing:.04em}
.lcard .lnome{font-size:12.5px;font-weight:700;line-height:1.3;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.lcard .lpreco{font-size:16px;font-weight:800}
.lcard .lbtn{display:block;text-align:center;font-size:12px;font-weight:800;padding:8px 6px;border-radius:10px;background:#12161C;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lcard .lbtn.ml{background:#FFE600;color:#2D3277}
.lcard .lbtn.amz{background:#131921;color:#FF9900}
@media (max-height:720px){.lateral .lcard:nth-of-type(2){display:none}}
@media (prefers-reduced-motion:reduce){.lateral{transition:none}}