/* O topo da Black nas páginas de LF e LM no ar (07/10/2026): "deixe a mesma página antiga e coloque uma header mais
   chamativa e parecida com a black atual". É a primeira dobra da Black B do lps (lp-vite/black/b.html, gerada pelo
   scripts/gerar_black.py) dentro da página antiga do curso: o céu da logo (navy indo pro violeta) com poucas
   estrelas, a logo da Black, o título em Museo 900 com o degradê ciano->menta na palavra de destaque, o formulário
   numa folha quadriculada presa com fita, o botão azul-claro com a borda de adesivo da logo, o adesivo "vai ter
   Vitalícia e mais!" e o contador em círculos de papel. A foto é a que já era da página.
   A faixa corrida que fecha a dobra é a da própria página antiga (a da Black por cima dela virava duas faixas seguidas).
   Sem glow: nada de halo, text-shadow nem sombra colorida, só sombra escura de objeto.
   Tudo preso em .bh e com famílias de fonte próprias: a página antiga só declara Museo 500 e 900, e um Museo 300/700
   solto aqui mudaria a letra dela inteira (o negrito 700 deixaria de cair no 900). */
@font-face{font-family:"Museo BH";src:url("/produtos/_comum/fontes/Museo300-Regular.woff2") format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:"Museo BH";src:url("/produtos/_comum/fontes/Museo500-Regular.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Museo BH";src:url("/produtos/_comum/fontes/Museo700-Regular.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Museo BH";src:url("/produtos/_comum/fontes/Museo900-Regular.woff2") format("woff2");font-weight:900;font-display:swap}
@font-face{font-family:"Kalam BH";src:url("/_comum/black-pausa/Kalam700-latin.woff2") format("woff2");font-weight:700;font-display:swap}

/* tokens da Black B (a barra fixa usa os mesmos) */
.bh,.bh-barra{--acc:#18F0FF;--tinta:#03203D;--tinta-2:#4A5670;--tinta-borda:rgba(3,32,61,.16);--folha:#FFFDF7;--fita:rgba(24,240,255,.6);
  --paper:#F5F4F0;--dim:rgba(245,244,240,.76);--mao:"Kalam BH",cursive;--fonte:"Museo BH",ui-rounded,"Segoe UI",system-ui,sans-serif;
  --grade:linear-gradient(rgba(0,153,255,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(0,153,255,.09) 1px,transparent 1px);
  --borda-adesivo:0 0 0 3px #fff,0 0 0 5.5px #03203D}

.bh{position:relative;z-index:1;margin:0;padding:0;min-height:calc(min(100svh,980px) - 58px);display:flex;flex-direction:column;overflow-x:clip;
  color:var(--paper);font:300 16px/1.55 var(--fonte);text-align:left;-webkit-font-smoothing:antialiased;
  /* o céu da logo, o miolo das letras da Black */
  background:linear-gradient(180deg,#02141F 0%,#06203F 36%,#0A2A55 60%,#2B1B6E 86%,#3A1A7A 100%)}
.bh *,.bh *::before,.bh *::after{box-sizing:border-box}
/* as estrelas da Black B (as mesmas duas peças, repetidas), só onde não tem texto: "nada atrás de conteúdo" */
.bh::before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%22560%22 height=%22500%22%3E%3Ccircle cx=%22253.3%22 cy=%22279.9%22 r=%221%22 fill=%22%23fff%22 opacity=%220.62%22/%3E%3Ccircle cx=%22478.8%22 cy=%2295.0%22 r=%221%22 fill=%22%23fff%22 opacity=%220.73%22/%3E%3Ccircle cx=%22444.1%22 cy=%2247.1%22 r=%220.6%22 fill=%22%23fff%22 opacity=%220.67%22/%3E%3Ccircle cx=%22498.6%22 cy=%22317.2%22 r=%221%22 fill=%22%23fff%22 opacity=%220.93%22/%3E%3Ccircle cx=%22366.2%22 cy=%22307.8%22 r=%220.6%22 fill=%22%2318F0FF%22 opacity=%220.85%22/%3E%3Ccircle cx=%2235.4%22 cy=%2217.8%22 r=%221.2%22 fill=%22%23fff%22 opacity=%220.37%22/%3E%3Ccircle cx=%22259.8%22 cy=%22220.3%22 r=%221.2%22 fill=%22%23fff%22 opacity=%220.49%22/%3E%3Ccircle cx=%22164.7%22 cy=%222.3%22 r=%221.5%22 fill=%22%2318F0FF%22 opacity=%220.52%22/%3E%3Ccircle cx=%22558.7%22 cy=%22497.8%22 r=%221.5%22 fill=%22%23fff%22 opacity=%220.50%22/%3E%3Ccircle cx=%22424.5%22 cy=%22256.4%22 r=%221.2%22 fill=%22%2318F0FF%22 opacity=%220.81%22/%3E%3Ccircle cx=%22224.2%22 cy=%22423.3%22 r=%220.6%22 fill=%22%23fff%22 opacity=%220.86%22/%3E%3Ccircle cx=%220.3%22 cy=%22104.9%22 r=%221%22 fill=%22%23fff%22 opacity=%220.58%22/%3E%3Ccircle cx=%22397.0%22 cy=%22209.9%22 r=%220.7%22 fill=%22%23fff%22 opacity=%220.82%22/%3E%3Ccircle cx=%22151.1%22 cy=%2243.6%22 r=%221%22 fill=%22%23fff%22 opacity=%220.80%22/%3E%3Ccircle cx=%2266.1%22 cy=%22123.2%22 r=%220.6%22 fill=%22%2318F0FF%22 opacity=%220.63%22/%3E%3Cpath d=%22M273.0 330.9Q273.0 335.9 278.0 335.9Q273.0 335.9 273.0 340.9Q273.0 335.9 268.0 335.9Q273.0 335.9 273.0 330.9Z%22 fill=%22%23fff%22/%3E%3C/svg%3E"),url("data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%22380%22 height=%22340%22%3E%3Ccircle cx=%22208.3%22 cy=%22117.6%22 r=%220.8%22 fill=%22%23fff%22 opacity=%220.40%22/%3E%3Ccircle cx=%22352.4%22 cy=%22133.6%22 r=%220.6%22 fill=%22%2318F0FF%22 opacity=%220.41%22/%3E%3Ccircle cx=%22169.0%22 cy=%2276.4%22 r=%221%22 fill=%22%23fff%22 opacity=%220.55%22/%3E%3Ccircle cx=%22231.0%22 cy=%22142.7%22 r=%221%22 fill=%22%23fff%22 opacity=%220.94%22/%3E%3Ccircle cx=%2283.4%22 cy=%22266.6%22 r=%221.5%22 fill=%22%23fff%22 opacity=%220.69%22/%3E%3Ccircle cx=%2274.6%22 cy=%22229.1%22 r=%221.2%22 fill=%22%23fff%22 opacity=%220.80%22/%3E%3Ccircle cx=%22311.1%22 cy=%22325.9%22 r=%220.7%22 fill=%22%23fff%22 opacity=%220.80%22/%3E%3C/svg%3E");
  -webkit-mask-image:linear-gradient(90deg,transparent 42%,#000 58%);mask-image:linear-gradient(90deg,transparent 42%,#000 58%)}
.bh > *{position:relative;z-index:1}
.bh :is(p,h2,figure,form){margin:0;padding:0}
.bh img{display:block;max-width:100%;height:auto}
.bh b{font-weight:700;color:var(--paper)}
.bh-wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- primeira dobra: duas colunas com o mesmo peso ----------
   A altura desconta a faixa corrida da página antiga (~58 px), que vem logo depois: é ela que fecha a primeira tela,
   como a faixa da Black B. */
.bh-topo{display:flex;justify-content:center;padding-top:22px}
.bh .bh-logo-topo{display:none}
.bh-grid{flex:1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-areas:"cabeca visual" "form visual";
  column-gap:clamp(32px,5vw,80px);align-content:center;align-items:center;padding-block:clamp(18px,3vh,36px) clamp(22px,3.5vh,40px)}
.bh-cabeca{grid-area:cabeca;align-self:end;container-type:inline-size}
.bh-visual{grid-area:visual;position:relative;display:flex;flex-direction:column;align-items:center}
.bh-form-area{grid-area:form;align-self:start}

.bh .bh-pilula{display:inline-flex;align-items:center;gap:8px;background:var(--acc);color:var(--tinta);font:900 13px/1.3 var(--fonte);letter-spacing:.02em;
  padding:7px 15px;border-radius:999px}
.bh-pilula::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--tinta);animation:bh-vivo 1.4s ease-in-out infinite}
@keyframes bh-vivo{0%,100%{opacity:1}50%{opacity:.25}}
/* duas linhas fixas, "Não compre o Lições" / "de Matemática agora.": a letra acompanha a coluna pra linha mais longa
   (a da LM, 10,5 vezes o corpo) sempre caber */
.bh .bh-titulo{margin-top:clamp(12px,2vh,20px);font:900 min(58px,9.2cqi)/1.04 var(--fonte);letter-spacing:-.025em;color:var(--paper);text-transform:none}
.bh-l{display:block;white-space:nowrap}
.bh-titulo em{font-style:normal;background:linear-gradient(92deg,#18F0FF,#0CF2B5);-webkit-background-clip:text;background-clip:text;
  color:transparent;-webkit-text-fill-color:transparent}
.bh .bh-lead{margin-top:clamp(10px,1.8vh,16px);max-width:33em;font-size:clamp(15px,min(1.35vw,2.2vh),18px);line-height:1.55;color:var(--dim);text-wrap:pretty}

/* o formulário é uma folha quadriculada presa com fita */
.bh-painel{position:relative;max-width:500px;margin-top:clamp(14px,2.4vh,24px);padding:clamp(18px,2.4vh,26px) 20px;border-radius:4px;rotate:-.8deg;
  background-color:var(--folha);background-image:var(--grade);background-size:20px 20px;box-shadow:0 26px 50px rgba(0,0,0,.45)}
.bh-painel::before{content:"";position:absolute;top:-13px;left:50%;width:112px;height:28px;translate:-50% 0;rotate:-3deg;background:var(--fita)}
.bh .bh-painel-rotulo{margin-bottom:10px;font:700 clamp(16px,1.35vw,18px)/1.25 var(--mao);color:var(--tinta)}
.bh-campos{display:grid;gap:clamp(7px,1.1vh,9px)}
.bh .bh-campos input{display:block;width:100%;height:clamp(46px,6vh,52px);margin:0;padding:0 16px;background:#fff;border:1.5px solid var(--tinta-borda);
  border-radius:14px;color:var(--tinta);font:500 16px/1 var(--fonte);box-shadow:none}
.bh .bh-campos input::placeholder{color:#8A93A6;opacity:1}
.bh .bh-campos input:focus{outline:none;border-color:var(--tinta);box-shadow:0 0 0 1px var(--tinta)}
.bh .bh-campos input.is-error{border-color:#C62828;box-shadow:0 0 0 1px #C62828}
.bh .bh-campos .bh-isca{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
/* o botão com a borda de adesivo da logo */
.bh .bh-btn{display:grid;place-items:center;width:100%;min-height:clamp(50px,6.6vh,56px);margin-top:6px;padding:0 16px;border:0;border-radius:14px;
  background:var(--acc);color:var(--tinta);font:900 clamp(14px,1.6vw,16px)/1.2 var(--fonte);letter-spacing:.06em;text-transform:uppercase;cursor:pointer;
  box-shadow:var(--borda-adesivo),0 10px 22px rgba(0,0,0,.35);transition:transform .12s,box-shadow .12s}
.bh .bh-btn:hover{transform:translateY(-2px)}
.bh .bh-btn:active{transform:translateY(1px);box-shadow:var(--borda-adesivo),0 4px 10px rgba(0,0,0,.35)}
.bh .bh-btn:focus-visible{outline:2px solid #fff;outline-offset:8px}
.bh .bh-btn:disabled{opacity:.65;cursor:progress;transform:none}
.bh .bh-erro{margin-top:4px;font-size:13px;font-weight:700;color:#C62828;text-align:center}
.bh-erro:empty{display:none}

/* ---------- a coluna da direita: logo, a foto da página e o contador ---------- */
.bh-logo-coluna{order:-1;position:relative;z-index:3;width:min(100%,clamp(320px,51vh,476px));margin:0 0 clamp(6px,1.2vh,14px)}
.bh-foto{position:relative;margin:0}
/* LF: o recorte do Felipe apontando pro logo do UN; o pé some no céu, abaixo da mão */
.bh-foto--felipe{width:min(100%,clamp(300px,50vh,460px))}
.bh-foto--felipe > img{
  -webkit-mask-image:radial-gradient(ellipse 64% 86% at 50% 34%,#000 70%,rgba(0,0,0,.8) 78%,rgba(0,0,0,.45) 87%,rgba(0,0,0,.15) 95%,transparent 100%),
    linear-gradient(#000 80%,rgba(0,0,0,.75) 90%,rgba(0,0,0,.35) 96%,transparent 100%);
  -webkit-mask-composite:source-in;
  mask-image:radial-gradient(ellipse 64% 86% at 50% 34%,#000 70%,rgba(0,0,0,.8) 78%,rgba(0,0,0,.45) 87%,rgba(0,0,0,.15) 95%,transparent 100%),
    linear-gradient(#000 80%,rgba(0,0,0,.75) 90%,rgba(0,0,0,.35) 96%,transparent 100%);
  mask-composite:intersect}
/* LM: as duas aulas (Prof. Engenheiro e Prof. Guisoli) impressas e presas com fita, como os prints da Black */
.bh-foto--aulas{width:min(100%,clamp(360px,64vh,530px));padding:14px 0 30px}
.bh-aula{position:relative;width:82%;padding:8px;background:#fff;border-radius:4px;box-shadow:0 22px 40px rgba(0,0,0,.45)}
.bh-aula img{border-radius:2px}
.bh-aula::before{content:"";position:absolute;z-index:1;top:-12px;left:50%;width:92px;height:24px;translate:-50% 0;rotate:-4deg;background:var(--fita)}
.bh-aula-1{rotate:-3.5deg}
.bh-aula-2{rotate:2.5deg;margin:-9% 0 0 auto}
.bh-aula-2::before{rotate:3deg;background:rgba(255,255,255,.7)}

/* o adesivo torto da Black, com a borda da logo e duas faíscas nas quinas */
.bh .bh-adesivo{position:absolute;z-index:4;bottom:16%;right:-6%;padding:7px 16px 4px;border-radius:6px;rotate:-6deg;white-space:nowrap;
  background:var(--acc);color:var(--tinta);font:700 clamp(19px,1.8vw,24px)/1.2 var(--mao);
  box-shadow:0 0 0 4px #fff,0 0 0 6.5px #03203D,0 12px 24px rgba(0,0,0,.35)}
.bh-foto--aulas .bh-adesivo{bottom:3%;right:auto;left:-5%}
.bh-faiscas{position:absolute;inset:0;z-index:5;pointer-events:none}
.bh-faiscas svg{position:absolute;height:auto;overflow:visible}
.bh-faiscas path{fill:#fff;stroke:#03203D;stroke-width:1.6px;stroke-linejoin:round;paint-order:stroke}
.bh-faiscas svg:first-child{top:-15px;right:-14px;width:27px}
.bh-faiscas svg:last-child{bottom:-11px;left:-10px;width:18px}

/* contador: quatro círculos de papel, o anel azul-claro mostra quanto falta */
.bh-aneis-bloco{order:2;position:relative;z-index:3;display:flex;flex-direction:column;align-items:center;gap:8px;margin-top:clamp(10px,1.6vh,18px)}
.bh .bh-aneis-rotulo{font:700 17px/1.2 var(--mao);color:var(--acc);rotate:-2deg}
.bh-aneis{display:flex;gap:10px}
.bh-anel{position:relative;width:clamp(58px,7.4vh,68px);aspect-ratio:1}
.bh-anel i{position:absolute;inset:0;border-radius:50%;background:var(--folha);box-shadow:0 10px 20px rgba(0,0,0,.35)}
.bh-anel i::after{content:"";position:absolute;inset:-1px;border-radius:50%;background:conic-gradient(var(--acc) calc(var(--f,0) * 1turn),transparent 0);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px))}
.bh-anel span{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.bh .bh-anel b{font-weight:900;font-size:clamp(19px,2.6vh,23px);line-height:1;letter-spacing:-.02em;color:var(--tinta)}
.bh-anel small{margin-top:3px;font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:var(--tinta-2)}
.bh-anel:nth-child(1){rotate:-4deg}.bh-anel:nth-child(2){rotate:3deg}.bh-anel:nth-child(3){rotate:-2deg}.bh-anel:nth-child(4){rotate:4deg}

/* ---------- celular: a logo abre a página, depois título, formulário, foto e contador ---------- */
@media (max-width:900px){
  .bh{min-height:0}
  .bh::before{-webkit-mask-image:linear-gradient(180deg,#000 0,#000 90px,transparent 150px,transparent 62%,#000 70%);
    mask-image:linear-gradient(180deg,#000 0,#000 90px,transparent 150px,transparent 62%,#000 70%)}
  .bh .bh-logo-topo{display:block;width:min(85%,340px)}
  .bh .bh-logo-coluna{display:none}
  .bh-grid{grid-template-columns:1fr;grid-template-areas:"cabeca" "form" "visual";row-gap:30px;padding-top:22px;padding-bottom:40px}
  .bh-cabeca{align-self:auto}
  .bh-painel{max-width:none;margin-top:0}
  .bh-foto--felipe{width:min(82%,380px)}
  .bh .bh-adesivo{right:-2%}
  .bh-foto--aulas .bh-adesivo{left:0;right:auto}
  .bh-faiscas svg:first-child{width:22px}
}
/* ---------- barra fixa (08/10/2026) ----------
   "um header fixo ali ou alguma coisa, uma barra deslizante fixa" (Felipe): no céu da logo, a logo à esquerda, o texto
   parado no meio (a primeira versão tinha faixa corrida e ela tirou: "nao quero texto correndo") e o botão azul-claro
   com a borda de adesivo à direita. Ela toda é o link. Escondida acima da tela (com folga pra sombra não vazar) até o barra.js pôr .is-on. */
.bh-barra{position:fixed;inset:0 0 auto;z-index:10000;translate:0 calc(-100% - 36px);transition:translate .35s cubic-bezier(.2,.8,.2,1);
  font:300 16px/1.2 var(--fonte);-webkit-font-smoothing:antialiased;
  background:linear-gradient(90deg,#02141F 0%,#06203F 30%,#0A2A55 55%,#2B1B6E 82%,#3A1A7A 100%);box-shadow:0 8px 24px rgba(3,32,61,.32)}
.bh-barra.is-on{translate:0 0}
.bh-barra *,.bh-barra *::before,.bh-barra *::after{box-sizing:border-box}
.bh-barra .bh-barra-link{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:20px;max-width:1200px;min-height:58px;
  margin:0 auto;padding:0 24px;color:var(--paper);text-decoration:none}
.bh-barra .bh-barra-logo{display:block;width:auto;max-width:none;height:30px}
.bh-barra-texto{min-width:0;font:500 15px/1.25 var(--fonte);color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bh-barra .bh-barra-texto b{margin-right:10px;font-weight:900;font-size:17px;color:var(--acc)}
.bh-barra-texto i{font-style:normal}
.bh-barra-btn{display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;border-radius:12px;background:var(--acc);color:var(--tinta);
  font:900 13px/1 var(--fonte);letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;box-shadow:0 0 0 2.5px #fff,0 0 0 4.5px #03203D;
  transition:transform .12s}
.bh-barra-btn svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.bh-barra-link:hover .bh-barra-btn{transform:translateY(-2px)}
.bh-barra-link:focus-visible{outline:none}
.bh-barra-link:focus-visible .bh-barra-btn{outline:2px solid #fff;outline-offset:6px}
/* abaixo de 1180 o texto vira duas linhas; a frase de cima pode quebrar de novo no celular */
@media (max-width:1180px){
  .bh-barra .bh-barra-link{padding-block:8px}
  .bh-barra-texto{font-size:13px;line-height:1.3;white-space:normal}
  .bh-barra .bh-barra-texto b{display:block;margin:0 0 2px;font-size:15px;line-height:1.2;text-wrap:balance}
  .bh-barra-texto > span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
}
/* celular: sai a logo (o texto já diz Black do UN), sai o "segunda," e o botão encolhe, pra tudo caber inteiro a 360 */
@media (max-width:640px){
  .bh-barra .bh-barra-link{grid-template-columns:minmax(0,1fr) auto;gap:10px;min-height:56px;padding:7px 12px 7px 14px}
  .bh-barra .bh-barra-logo{display:none}
  .bh-barra-texto{font-size:12px}
  .bh-barra .bh-barra-texto b{font-size:14px}
  .bh-barra-texto i{display:none}
  .bh-barra-btn{gap:6px;height:36px;padding:0 10px;font-size:11.5px;letter-spacing:.03em}
  .bh-barra-btn svg{width:13px;height:13px}
}
@media (max-width:359px){
  .bh-barra .bh-barra-texto b{font-size:12.5px}
  .bh-barra-texto{font-size:11px}
  .bh-barra-btn svg{display:none}
}
@media (prefers-reduced-motion:reduce){.bh-pilula::before{animation:none}.bh-barra{transition:none}}