/* tema.css — páginas públicas de tema (SEO) · Rumo ao 10 */
:root{
  --azul:#1E3A8A; --azul-m:#2563EB; --azul-l:#EFF6FF;
  --verde:#16A34A; --verde-l:#F0FDF4; --laranja:#EA580C;
  --texto:#0F172A; --texto-2:#475569; --borda:#E2E8F0;
  --bg:#F8FAFC; --branco:#FFFFFF; --radius:12px;
  --font-title:'DM Serif Display',Georgia,serif; --font-body:'DM Sans',system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--branco);color:var(--texto);line-height:1.65}
img{max-width:100%}
a{color:var(--azul-m)}

nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--borda);padding:0 5%;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-family:var(--font-title);font-size:1.4rem;color:var(--azul);text-decoration:none;display:flex;align-items:center;gap:8px}
.nav-logo em{font-style:normal;color:#2E7032}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-links a{color:var(--texto-2);text-decoration:none;font-size:.95rem}
.nav-links a:hover{color:var(--azul)}
.nav-cta{background:var(--azul);color:#fff!important;padding:9px 18px;border-radius:8px;font-weight:600}

.wrap{max-width:820px;margin:0 auto;padding:0 20px}
.hero{background:linear-gradient(160deg,var(--azul-l) 0%,var(--branco) 100%);padding:44px 0 36px;border-bottom:1px solid var(--borda)}
.crumb{font-size:.85rem;color:var(--texto-2);margin-bottom:14px}
.crumb a{color:var(--texto-2);text-decoration:none}
.crumb a:hover{text-decoration:underline}
h1{font-family:var(--font-title);font-size:2.1rem;line-height:1.2;margin-bottom:14px;font-weight:400}
.sub{color:var(--texto-2);font-size:1.05rem;max-width:62ch}
.selos{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.selo{background:var(--branco);border:1px solid var(--borda);border-radius:999px;padding:5px 13px;font-size:.82rem;color:var(--texto-2);font-weight:500}

section{padding:38px 0}
h2{font-family:var(--font-title);font-size:1.55rem;font-weight:400;margin-bottom:8px}
h2+.dica{color:var(--texto-2);font-size:.95rem;margin-bottom:22px}
h3{font-size:1.02rem;margin-bottom:10px;font-weight:600}

.q{border:1px solid var(--borda);border-radius:var(--radius);padding:22px;margin-bottom:18px;background:var(--branco)}
.q-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.q-num{background:var(--azul);color:#fff;width:26px;height:26px;border-radius:6px;display:grid;place-items:center;font-size:.82rem;font-weight:700;flex-shrink:0}
.q-tag{font-size:.78rem;color:var(--texto-2);background:var(--bg);border-radius:999px;padding:3px 10px}
.q-txt{margin-bottom:14px}
/* figura da questao: SVG inline ou <img> extraido para /images/q/ */
.q-fig{margin:16px 0 4px}
.q-fig svg,.q-fig img{display:block;margin:0 auto;max-width:100%;height:auto}
.alts{list-style:none;display:flex;flex-direction:column;gap:7px}
.alt{border:1px solid var(--borda);border-radius:8px;padding:9px 13px;display:flex;gap:10px;align-items:flex-start;font-size:.96rem}
.alt .letra{font-weight:700;color:var(--texto-2);flex-shrink:0}
.alt.correta{border-color:var(--verde);background:var(--verde-l)}
.alt.correta .letra{color:var(--verde)}
.marca{color:var(--verde);font-weight:600;font-size:.8rem;white-space:nowrap}
.exp{margin-top:14px;background:var(--bg);border-left:3px solid var(--azul-m);border-radius:0 8px 8px 0;padding:12px 15px;font-size:.94rem;color:var(--texto-2)}
.exp strong{color:var(--texto)}

.topicos{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.topicos span{border:1px solid var(--borda);border-radius:8px;padding:6px 12px;font-size:.9rem;color:var(--texto-2)}

.cta{background:var(--azul);color:#fff;border-radius:var(--radius);padding:32px 28px;text-align:center;margin:8px 0}
.cta h2{color:#fff;margin-bottom:10px}
.cta p{opacity:.92;max-width:52ch;margin:0 auto 20px}
.btn{display:inline-block;background:#fff;color:var(--azul);padding:13px 26px;border-radius:8px;font-weight:600;text-decoration:none}
.btn:hover{opacity:.92}
.cta small{display:block;margin-top:14px;opacity:.8;font-size:.85rem}

.irmaos{border-top:1px solid var(--borda);padding-top:26px}
.irmaos ul{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px;margin-top:14px}
.irmaos a{display:block;border:1px solid var(--borda);border-radius:8px;padding:12px 14px;text-decoration:none;color:var(--texto);font-size:.94rem}
.irmaos a:hover{border-color:var(--azul-m);background:var(--azul-l)}

footer{border-top:1px solid var(--borda);padding:30px 5%;text-align:center;color:var(--texto-2);font-size:.9rem;margin-top:20px}
footer a{color:var(--texto-2)}

@media(max-width:640px){
  h1{font-size:1.65rem} h2{font-size:1.35rem}
  .nav-links a:not(.nav-cta){display:none}
  .hero{padding:30px 0 26px}
  .q{padding:17px}
}

/* hub /materia/ano */
.temas{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.temas a{display:flex;flex-direction:column;gap:5px;border:1px solid var(--borda);border-radius:var(--radius);
  padding:16px 18px;text-decoration:none;color:var(--texto);height:100%}
.temas a:hover{border-color:var(--azul-m);background:var(--azul-l)}
.temas strong{font-size:1.02rem}
.temas-desc{font-size:.88rem;color:var(--texto-2);line-height:1.45}
.temas-n{font-size:.8rem;color:var(--azul-m);font-weight:600;margin-top:auto;padding-top:6px}

/* ══════════ CHAMADA NO MEIO DO CONTEUDO ══════════ */
.cta-meio{
  position:relative;overflow:hidden;isolation:isolate;
  margin:14px 0 28px;padding:28px 24px;border-radius:18px;
  text-align:center;color:#fff;
  background:linear-gradient(135deg,#1E3A8A 0%,#2563EB 100%);
  box-shadow:0 10px 30px rgba(37,99,235,.30);
  animation:respira 3.2s ease-in-out infinite;
}
.cta-meio.gratis{
  background:linear-gradient(135deg,#047857 0%,#16A34A 55%,#22C55E 100%);
  box-shadow:0 10px 32px rgba(22,163,74,.38);
  animation:respiraVerde 3.2s ease-in-out infinite;
}
/* faixa de brilho que atravessa o cartao de tempos em tempos */
.cta-meio::after{
  content:"";position:absolute;z-index:-1;top:0;left:-60%;width:45%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.30),transparent);
  transform:skewX(-18deg);animation:brilho 5s ease-in-out infinite;
}
.cta-meio-tag{
  display:inline-block;margin-bottom:12px;padding:5px 15px;border-radius:999px;
  background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.5);
  font-size:.76rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  animation:pula 2.6s ease-in-out infinite;
}
.cta-meio-titulo{
  font-family:var(--font-title);font-size:1.55rem;line-height:1.25;margin:0 0 10px;
}
.cta-meio-texto{
  font-size:1rem;line-height:1.6;margin:0 auto;max-width:44ch;opacity:.95;
}
.cta-meio-btn{
  display:inline-block;margin-top:20px;padding:15px 30px;border-radius:12px;
  background:#fff;color:#14532D;font-weight:800;font-size:1.05rem;text-decoration:none;
  box-shadow:0 5px 16px rgba(0,0,0,.20);
  transition:transform .15s ease,box-shadow .15s ease;
}
.cta-meio:not(.gratis) .cta-meio-btn{color:#1E3A8A}
.cta-meio-btn:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 10px 26px rgba(0,0,0,.26)}

@keyframes respira{
  0%,100%{box-shadow:0 10px 30px rgba(37,99,235,.30)}
  50%    {box-shadow:0 14px 42px rgba(37,99,235,.55)}
}
@keyframes respiraVerde{
  0%,100%{box-shadow:0 10px 32px rgba(22,163,74,.38)}
  50%    {box-shadow:0 16px 46px rgba(34,197,94,.62)}
}
@keyframes brilho{0%,70%{left:-60%}100%{left:135%}}
@keyframes pula{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}

/* ══════════ BENEFICIOS NO CTA FINAL ══════════ */
.cta-bens{list-style:none;text-align:left;max-width:34ch;margin:0 auto 20px;
  display:flex;flex-direction:column;gap:8px}
.cta-bens li{font-size:.94rem;opacity:.96;padding-left:26px;position:relative}
.cta-bens li::before{content:"✓";position:absolute;left:0;font-weight:800}

/* ══════════ MARCADORES DE EXERCICIO LIBERADO ══════════ */
.selo-gratis{
  background:linear-gradient(135deg,#15803D,#22C55E)!important;
  border-color:#15803D!important;color:#fff!important;
  font-weight:800!important;letter-spacing:.02em;
  box-shadow:0 4px 14px rgba(22,163,74,.40);
  animation:respiraSelo 2.8s ease-in-out infinite;
}
@keyframes respiraSelo{
  0%,100%{box-shadow:0 4px 14px rgba(22,163,74,.40);transform:scale(1)}
  50%    {box-shadow:0 7px 22px rgba(34,197,94,.65);transform:scale(1.04)}
}
.tag-gratis{display:inline-block;background:linear-gradient(135deg,#15803D,#22C55E);color:#fff;
  border-radius:999px;padding:3px 10px;font-size:.7rem;font-weight:800;letter-spacing:.03em;
  vertical-align:middle;margin-left:7px;text-transform:uppercase}

/* quem prefere menos movimento nao ve animacao nenhuma */
@media (prefers-reduced-motion: reduce){
  .cta-meio,.cta-meio-tag,.selo-gratis{animation:none}
  .cta-meio::after{display:none}
  .cta-meio-btn{transition:none}
}

@media(max-width:640px){
  .cta-meio{padding:24px 18px}
  .cta-meio-titulo{font-size:1.3rem}
  .cta-meio-btn{width:100%;padding:15px 20px}
}

/* listas dentro de enunciado/explicacao (ex.: <ol class="exp-steps">) */
.q-txt ol,.q-txt ul,.exp ol,.exp ul{padding-left:1.5em;margin:6px 0}
.q-txt li,.exp li{margin:2px 0}

/* ───── Bloco de download do PDF (04/10/2026) ─────────────────────────────
   Fica antes das questões: quem chega de "exercícios com gabarito" procura
   isso nos primeiros segundos. Era o único formato em que os concorrentes
   ganhavam por ausência, não por qualidade. */
.pdfbox{display:flex;align-items:center;gap:20px;border:1.5px solid var(--verde);
  background:var(--verde-l);border-radius:14px;padding:18px 22px}
.pdfbox-txt{flex:1;min-width:0}
.pdfbox h2{margin:0 0 4px;font-size:1.12rem;color:#14532D}
.pdfbox p{margin:0;font-size:.92rem;color:#166534;max-width:none}
.btn-pdf{flex:none;display:inline-block;background:var(--verde);color:#fff;
  font-weight:700;font-size:.98rem;padding:12px 22px;border-radius:10px;
  text-decoration:none;white-space:nowrap}
.btn-pdf:hover{background:#15803D}
@media(max-width:620px){
  .pdfbox{flex-direction:column;align-items:stretch;gap:12px;padding:16px}
  .btn-pdf{text-align:center}
}