/* =================================================================
   Aula Sergio Santos · identidade Método SR
   Azul sobre foto, títulos condensados com destaque em ciano.
   ================================================================= */
:root{
  --grafite:#0B0E14; --carvao:#161B26; --surface:#12161F; --surface-2:#1A2030;
  --azul-eletrico:#0066FF; --azul-real:#0A2BFF; --azul-ciano:#00B2FF; --ciano-neon:#00F5FF;
  --azul-noite:#04122E;
  --branco-gelo:#F2F4F7; --prata:#E4E6EB; --aco:#B8BDC6;
  --erro:#FF6B7A;
  --linha:rgba(184,189,198,.14); --linha-forte:rgba(184,189,198,.26);
  --grad-azul:linear-gradient(135deg,var(--azul-eletrico),var(--azul-real));
  --grad-titulo:linear-gradient(135deg,#fff 30%,#B8BDC6);
  --fonte:'Inter Tight',system-ui,-apple-system,sans-serif;
  --condensada:'Barlow Condensed','Inter Tight',system-ui,sans-serif;
  --raio:20px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;
  background:var(--grafite);color:var(--prata);
  font-family:var(--fonte);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;position:relative;isolation:isolate;
}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--ciano-neon);outline-offset:3px;border-radius:8px}

/* ================= FUNDO: Sergio no palco, plateia cheia ================= */
.fundo{position:fixed;inset:0;z-index:-1;overflow:hidden;background:var(--grafite)}
.fundo img{width:100%;height:100%;object-fit:cover;object-position:46% 40%;filter:saturate(.5) brightness(.55)}
.fundo::after{ /* escurece o suficiente para o texto ler bem, sem colorir */
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,14,20,.55) 0%,rgba(11,14,20,.35) 40%,rgba(11,14,20,.75) 100%);
}

/* ================= TOPO ================= */
.topo{width:min(1440px,100%);margin:0 auto;padding:26px clamp(16px,4vw,56px) 0;position:relative;z-index:1}
.topo img{height:40px;width:auto;filter:drop-shadow(0 2px 12px rgba(0,0,0,.5))}

/* ================= LAYOUT ================= */
.palco{
  flex:1;width:min(1440px,100%);margin:0 auto;position:relative;z-index:1;
  padding:clamp(20px,3vw,40px) clamp(16px,4vw,56px) clamp(28px,4vw,48px);
  display:grid;grid-template-columns:minmax(0,1.55fr) minmax(360px,1fr);
  gap:clamp(28px,5vw,80px);align-items:center;
}

/* ================= BANNER (minimalista) ================= */
.banner{
  border-radius:var(--raio);overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background:var(--grafite);
  box-shadow:0 30px 60px -20px rgba(0,0,0,.6);
  animation:subir .8s cubic-bezier(.22,.7,.3,1) both;
}
.banner-arte{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--grafite);container-type:inline-size}
.banner-arte .arte{width:100%;height:100%;object-fit:cover}
.banner.com-arte .banner-auto{display:none}

.banner-auto{position:absolute;inset:0;overflow:hidden;background:var(--grafite)}
.ba-foto{position:absolute;inset:0 0 0 38%;background:var(--foto,none) 62% 30%/cover no-repeat}
.ba-foto::after{ /* uma única transição, do grafite para a foto */
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,var(--grafite) 0%,rgba(11,14,20,.6) 28%,rgba(11,14,20,0) 60%);
}
.ba-eng{display:none}
.ba-logo{display:none} /* a logo já está no topo da página */

.ba-conteudo{
  position:absolute;z-index:2;left:5.5cqw;top:0;bottom:0;width:50%;
  display:flex;flex-direction:column;justify-content:center;gap:2.4cqw;
}
.ba-tag{
  align-self:flex-start;display:inline-flex;align-items:center;gap:1.2cqw;
  font:700 1.6cqw/1 var(--fonte);letter-spacing:.22em;text-transform:uppercase;color:var(--aco);
}
.ponto{flex:none;width:max(6px,1cqw);height:max(6px,1cqw);border-radius:50%;background:var(--azul-ciano);animation:pulsar 1.6s ease-in-out infinite}
.ba-tema{
  font:800 6cqw/.95 var(--condensada);text-transform:uppercase;letter-spacing:-.005em;
  color:#fff;text-wrap:balance;
}
.ba-tema .destaque{display:block;margin-top:.1em;color:var(--azul-ciano)}
.ba-topicos{list-style:none;display:grid;gap:1.3cqw;margin-top:.8cqw;padding-top:2.4cqw;border-top:1px solid rgba(255,255,255,.14)}
.ba-topicos li{display:flex;align-items:center;gap:1.4cqw;font:500 1.75cqw/1.2 var(--fonte);color:var(--prata)}
.ba-topicos i{flex:none;display:grid;place-items:center;color:var(--azul-ciano)}
.ba-topicos svg{width:2.3cqw;height:2.3cqw}
.ba-assinatura{
  position:absolute;z-index:3;right:5cqw;bottom:4.6cqw;
  display:flex;flex-direction:column;align-items:flex-end;gap:.5cqw;text-align:right;
  text-shadow:0 1px 1.4cqw rgba(0,0,0,.7);
}
.ba-assinatura b{font:800 2.6cqw/1 var(--condensada);letter-spacing:.03em;text-transform:uppercase;color:#fff}
.ba-assinatura span{font:500 1.4cqw/1.2 var(--fonte);color:var(--prata)}

.banner-info{display:flex;background:var(--surface);border-top:1px solid rgba(255,255,255,.1)}
.info{
  flex:1;display:flex;align-items:center;justify-content:center;gap:10px;padding:16px 10px;
  font:700 15px/1.2 var(--fonte);letter-spacing:.05em;text-transform:uppercase;color:var(--branco-gelo);
  text-align:center;white-space:nowrap;
}
.info+.info{border-left:1px solid var(--linha)}
.info svg{width:20px;height:20px;flex:none;color:var(--azul-ciano)}

/* ================= CARD DO FORMULÁRIO ================= */
.card{
  position:relative;
  background:rgba(14,18,26,.82);
  -webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);
  border:1px solid rgba(255,255,255,.12);border-radius:24px;
  padding:clamp(24px,2.6vw,38px);
  box-shadow:0 30px 70px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.06);
  animation:subir .8s cubic-bezier(.22,.7,.3,1) .12s both;
}
.selo{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;
  padding:7px 14px;border-radius:999px;
  background:transparent;border:1px solid rgba(0,178,255,.4);
  font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--azul-ciano);
}
.card-titulo{
  font-size:clamp(28px,2.5vw,36px);font-weight:800;line-height:1.1;letter-spacing:-.025em;
  color:#fff;
}
.card-sub{margin-top:12px;font-size:15.5px;line-height:1.55;color:var(--aco)}

form{margin-top:22px}
.campo{margin-bottom:14px}
.campo label{display:block;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--prata)}
.campo input{
  width:100%;min-height:54px;padding:14px 18px;
  font:500 16px/1.2 var(--fonte);color:var(--branco-gelo);
  background:rgba(0,0,0,.28);border:1px solid rgba(255,255,255,.12);border-radius:12px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.campo input::placeholder{color:rgba(184,189,198,.55)}
.campo input:focus{outline:none;border-color:var(--azul-eletrico);background:rgba(0,0,0,.45);box-shadow:0 0 0 3px rgba(0,102,255,.3)}
.campo input.invalido{border-color:var(--erro);box-shadow:0 0 0 3px rgba(255,107,122,.14)}
.campo input.valido{border-color:rgba(0,178,255,.55)}
.erro{display:block;margin-top:6px;font-size:13px;font-weight:500;color:var(--erro)}
.erro[hidden]{display:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

.btn{
  position:relative;overflow:hidden;width:100%;min-height:60px;margin-top:8px;
  display:flex;align-items:center;justify-content:center;gap:10px;
  background:var(--azul-eletrico);color:#fff;border:1px solid transparent;border-radius:12px;
  font:800 16px/1 var(--fonte);letter-spacing:.06em;text-transform:uppercase;cursor:pointer;
  transition:background .2s ease,transform .2s ease;text-decoration:none;
}
.btn::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(105deg,transparent 38%,rgba(255,255,255,.42) 50%,transparent 62%);
  transform:translateX(-115%);animation:brilho 3.6s ease-in-out 1.2s infinite;
}
.btn:hover{background:#1A75FF;transform:translateY(-1px)}
.btn::after{display:none}
.btn:active{transform:translateY(1px)}
.btn-seta{transition:transform .2s ease}
.btn:hover .btn-seta{transform:translateX(3px)}
.spinner{display:none;width:22px;height:22px;border-radius:50%;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;animation:girar .8s linear infinite}
.btn.carregando{cursor:wait}
.btn.carregando .btn-txt,.btn.carregando .btn-seta{display:none}
.btn.carregando .spinner{display:block}

.privacidade{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:12px;font-size:12.5px;color:var(--aco)}

.sociais{
  display:flex;align-items:center;justify-content:center;gap:10px;
  margin-top:24px;padding-top:22px;border-top:1px solid var(--linha);
}
.sociais span{font-size:13.5px;font-weight:600;color:var(--aco);margin-right:4px}
.sociais a{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--linha-forte);background:rgba(255,255,255,.06);color:var(--prata);
  transition:border-color .2s ease,background .2s ease,transform .2s ease,color .2s ease;
}
.sociais a:hover{border-color:var(--azul-eletrico);background:rgba(0,102,255,.25);color:#fff;transform:translateY(-2px)}

/* ================= RODAPÉ ================= */
.rodape{
  position:relative;z-index:1;
  padding:22px 16px calc(22px + env(safe-area-inset-bottom));text-align:center;
  font-size:12.5px;color:var(--aco);border-top:1px solid var(--linha);
  background:rgba(11,14,20,.75);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.rodape a{color:var(--azul-ciano);font-weight:600;text-decoration:none}
.rodape a:hover{text-decoration:underline}

/* ================= OBRIGADO ================= */
.obrigado{flex:1;display:grid;place-items:center;padding:clamp(24px,5vw,56px) 16px;position:relative;z-index:1}
.obrigado .card{width:min(620px,100%);text-align:center}
.obrigado .selo{margin-bottom:20px}
.progresso{
  height:34px;margin:0 0 26px;border-radius:999px;overflow:hidden;
  background:rgba(0,0,0,.35);border:1px solid var(--linha-forte);
}
.progresso-barra{
  width:90%;height:100%;border-radius:999px;background:var(--grad-azul);
  display:flex;align-items:center;justify-content:space-between;padding:0 14px;
  font-size:11.5px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:#fff;white-space:nowrap;
  animation:encher 1.2s cubic-bezier(.22,.7,.3,1) both;
}
.obrigado .card-titulo{font-size:clamp(28px,4.4vw,40px)}
.obrigado .card-sub{font-size:16px;margin:14px auto 26px;max-width:44ch}
.obrigado .card-sub b{color:var(--branco-gelo)}
.btn.whats{background:#1FAF55}
.btn.whats:hover{background:#23C25F}
.contagem{margin-top:14px;font-size:13.5px;color:var(--aco);min-height:1.4em}
.resumo-aula{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--linha);
  display:grid;gap:6px;font-size:14px;color:var(--aco);
}
.resumo-aula b{font:800 22px/1.05 var(--condensada);text-transform:uppercase;color:var(--branco-gelo);letter-spacing:.01em}

/* ================= ANIMAÇÕES ================= */
@keyframes subir{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@keyframes pulsar{0%,100%{opacity:1}50%{opacity:.35}}
@keyframes girar{to{transform:rotate(360deg)}}
@keyframes brilho{0%{transform:translateX(-115%)}40%,100%{transform:translateX(115%)}}
@keyframes encher{from{width:0}to{width:90%}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* ================= RESPONSIVO ================= */
@media (max-width:1100px){
  .palco{grid-template-columns:minmax(0,1.3fr) minmax(340px,1fr);gap:32px}
  .info{font-size:13px}
}
@media (max-width:960px){
  .palco{grid-template-columns:1fr;gap:18px;padding-top:16px}
  .card,.banner{max-width:640px;width:100%;margin:0 auto}
}

/* celular: foto do Sergio vira faixa no topo e o banner sobe por cima */
@media (max-width:600px){
  .fundo{position:absolute;inset:0 0 auto 0;height:min(78vw,340px)}
  .fundo img{object-position:50% 22%;filter:saturate(.6) brightness(.7)}
  .fundo::after{background:linear-gradient(180deg,rgba(11,14,20,.45) 0%,rgba(11,14,20,.15) 35%,rgba(11,14,20,.5) 70%,var(--grafite) 100%)}
  .topo{padding-top:16px;text-align:center}
  .topo img{height:30px;margin:0 auto}
  .palco{padding:min(29vw,120px) 14px 24px;gap:12px}
  .banner{border-radius:14px}
  .ba-conteudo{width:60%;gap:2.6cqw}
  .ba-tema{font-size:7.2cqw}
  .ba-topicos{display:none}
  .ba-tag{font-size:max(8px,2.2cqw)}
  .ba-assinatura b{font-size:max(11px,3.4cqw)}
  .ba-assinatura span{display:none}
  .info{gap:6px;padding:11px 6px;font-size:11.5px;letter-spacing:.02em;white-space:normal}
  .info svg{width:16px;height:16px}
  .card{padding:20px 18px 18px;border-radius:18px}
  .card .selo,.card .card-sub{display:none}
  .card-titulo{font-size:25px;text-align:center}
  form{margin-top:16px}
  .campo{margin-bottom:10px}
  .campo label{margin-bottom:6px}
  .campo input{min-height:50px;padding:12px 16px}
  .btn{min-height:56px;font-size:14.5px;letter-spacing:.04em;padding:0 14px}
  .privacidade{margin-top:10px}
  .sociais{margin-top:18px;padding-top:16px}
  .obrigado{padding:min(30vw,130px) 14px 32px;place-items:start center}
  .obrigado .card .selo{display:inline-flex}
  .obrigado .card .card-sub{display:block}
  .obrigado .card-titulo{font-size:28px}
  .obrigado .card-sub{font-size:15px;margin:12px auto 20px}
  .progresso{margin-bottom:20px}
  .progresso-barra{font-size:10px;padding:0 10px}
  .so-desk{display:none}
}
@media (max-width:360px){
  .info{flex-direction:column;gap:3px}
  .card-titulo{font-size:23px}
}