:root {
  --fundo: #140d24;
  --superficie: #20163a;
  --superficie-2: #2c2050;
  --borda: #43346e;
  --texto: #f5f0ff;
  --suave: #c0b5dc;
  --tecido: #ff8fa3;
  --faisca: #5eead4;
  --ouro: #ffd166;
  --raio: 18px;
  --titulo: "Fraunces", Georgia, serif;
  --corpo: "Nunito Sans", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--fundo); color: var(--texto); font: 400 1.0625rem/1.55 var(--corpo); min-height: 100vh; }
#rede { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.topo, main, .rodape { position: relative; z-index: 1; }
.topo { z-index: 3; }
[hidden] { display: none !important; }
h1, h2, h3 { font-family: var(--titulo); font-weight: 700; line-height: 1.15; margin: 0 0 .5rem; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 .75rem; }
a { color: var(--faisca); }
:focus-visible { outline: 3px solid var(--ouro); outline-offset: 2px; }

.topo { display: flex; align-items: center; justify-content: space-between; max-width: 1120px; margin: 0 auto; padding: 16px; }
.marca { display: flex; align-items: center; gap: 10px; color: var(--texto); text-decoration: none; font: 700 1.35rem var(--titulo); }
.nav { display: flex; gap: 4px; }
.nav a { display: flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; color: var(--suave); text-decoration: none; font-weight: 600; }
.nav a:hover { color: var(--texto); }
.nav a[aria-current="page"] { background: var(--superficie-2); color: var(--faisca); }
.nav svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

main { max-width: 1120px; margin: 0 auto; padding: 8px 16px 40px; }
.vista { animation: surgir .35s ease; }
@keyframes surgir { from { opacity: 0; transform: translateY(8px); } }
.lead { color: var(--suave); font-size: 1.15rem; max-width: 60ch; }
.sobre { color: var(--faisca); font-weight: 800; margin-bottom: .5rem; }

.hero { display: grid; grid-template-columns: 1fr 1.1fr; gap: 32px; align-items: center; padding: 16px 0 28px; }
.stats { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.stat { background: var(--superficie); border: 1px solid var(--borda); border-radius: 14px; padding: 10px 16px; min-width: 104px; }
.stat b { display: block; font: 700 1.6rem var(--titulo); color: var(--ouro); }
.stat span { color: var(--suave); font-size: .9rem; }

#cerebro { display: block; width: 100%; max-width: 460px; margin: 0 auto; filter: drop-shadow(0 12px 40px rgba(255, 143, 163, .25)); }
.tecido { fill: url(#g-tecido); }
.tronco { fill: #b84f6c; }
.sulcos { fill: none; stroke: #a83f60; stroke-width: 3; stroke-linecap: round; opacity: .55; pointer-events: none; }
.estrias { fill: none; stroke: #6d3f8e; stroke-width: 2.5; stroke-linecap: round; pointer-events: none; }
.regiao { cursor: pointer; outline: none; }
.regiao > :first-child { fill: #fff; fill-opacity: .1; stroke: #fff; stroke-opacity: .55; stroke-width: 1.5; transition: fill-opacity .2s, stroke .2s; }
.regiao[data-regiao="cerebelo"] > :first-child { fill: #b98ae0; fill-opacity: 1; }
.regiao[data-regiao="nucleos"] > :first-child { fill: #7c4dc4; fill-opacity: .75; }
.regiao[data-regiao="amigdala"] > :first-child { fill: var(--ouro); fill-opacity: 1; stroke: #7a5a00; }
.regiao.linha > :first-child { fill: none; stroke: var(--faisca); stroke-opacity: 1; stroke-width: 13; stroke-linecap: round; pointer-events: stroke; }
.regiao:hover > :first-child { fill-opacity: .35; }
.regiao[data-regiao="cerebelo"]:hover > :first-child, .regiao[data-regiao="amigdala"]:hover > :first-child { fill-opacity: .8; }
.regiao:focus-visible > :first-child { stroke: var(--ouro); stroke-opacity: 1; stroke-width: 4; }
.regiao.ativa > :first-child { stroke: #fff; stroke-opacity: 1; stroke-width: 3.5; animation: pulso 1.6s ease-in-out infinite; }
.regiao.linha.ativa > :first-child { stroke: #b7fff0; stroke-width: 16; }
@keyframes pulso { 50% { filter: brightness(1.3); } }

.regiao-info { background: var(--superficie); border: 1px solid var(--borda); border-radius: var(--raio); padding: 16px 18px; margin-top: 12px; min-height: 164px; }
.regiao-info .papel { color: var(--faisca); font-weight: 800; font-size: .95rem; margin-bottom: 2px; }
.regiao-info a { font-weight: 700; }

.cartao { background: var(--superficie); border: 1px solid var(--borda); border-radius: var(--raio); padding: 20px; }
.dia { margin-bottom: 16px; border-color: var(--faisca); }
.dia .sobre { margin-bottom: 4px; }
.alerta { border-left: 5px solid var(--ouro); }
.alerta p { color: var(--suave); margin: 0; }

.filtros { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }
.chip { font: 600 .95rem var(--corpo); color: var(--suave); background: var(--superficie); border: 1px solid var(--borda); border-radius: 999px; padding: 8px 16px; min-height: 40px; cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--faisca); border-color: var(--faisca); color: #0c2a26; }

.grade { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.grade.dois { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin-top: 16px; }
.dica { display: flex; flex-direction: column; }
.dica .etiqueta, .video .etiqueta { color: var(--tecido); font-weight: 800; font-size: .85rem; }
.dica p { color: var(--suave); }
.dica ul { margin: 0 0 16px; padding-left: 20px; }
.dica li { margin-bottom: 4px; }
.marcar { margin-top: auto; align-self: flex-start; font: 700 .95rem var(--corpo); color: var(--faisca); background: none; border: 1px solid var(--faisca); border-radius: 999px; padding: 8px 14px; min-height: 40px; cursor: pointer; }
.marcar[aria-pressed="true"] { background: var(--faisca); color: #0c2a26; }

.video { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.tela { position: relative; aspect-ratio: 16 / 9; background: #000; display: block; width: 100%; border: 0; padding: 0; cursor: pointer; }
.tela img, .tela iframe { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border: 0; }
.tela .play { position: absolute; left: 50%; top: 50%; width: 60px; height: 60px; margin: -30px 0 0 -30px; border-radius: 50%; background: var(--tecido); display: grid; place-items: center; box-shadow: 0 0 0 8px rgba(255, 143, 163, .25); }
.tela .play::after { content: ""; margin-left: 5px; border-left: 18px solid #3a0d1c; border-top: 11px solid transparent; border-bottom: 11px solid transparent; }
.video .texto { padding: 14px 16px 16px; }
.video h3 { margin-bottom: 4px; }
.video .canal { color: var(--suave); font-size: .95rem; margin: 0 0 4px; }
.video a { font-size: .95rem; font-weight: 700; }

.jogo p { color: var(--suave); }
.neuronios { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; max-width: 270px; margin: 16px auto; }
.neuronio { aspect-ratio: 1; border-radius: 50%; border: 2px solid var(--borda); background: var(--superficie-2); cursor: pointer; transition: background .12s, box-shadow .12s, transform .12s; touch-action: manipulation; }
.neuronio:disabled { cursor: default; }
.neuronio.dispara { background: var(--faisca); border-color: #fff; box-shadow: 0 0 26px var(--faisca); transform: scale(1.06); }
.neuronio.erro { background: var(--tecido); box-shadow: 0 0 26px var(--tecido); }
.jogo .placar { font-weight: 700; color: var(--texto); }
.botao { font: 800 1rem var(--corpo); color: #3a0d1c; background: var(--tecido); border: 0; border-radius: 999px; padding: 12px 24px; min-height: 46px; cursor: pointer; }
.botao:hover { filter: brightness(1.08); }
.lista-palavras { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; padding: 0; list-style: none; }
.lista-palavras li { background: var(--superficie-2); border-radius: 10px; padding: 6px 12px; font-weight: 600; }
.lista-palavras li.acerto { background: var(--faisca); color: #0c2a26; }
.jogo .contagem { font: 700 2rem var(--titulo); color: var(--ouro); margin: 0; }
textarea { width: 100%; min-height: 110px; margin: 12px 0; padding: 12px; border-radius: 12px; border: 1px solid var(--borda); background: var(--fundo); color: var(--texto); font: 400 1rem var(--corpo); }
label { font-weight: 700; }

.rodape { text-align: center; color: var(--suave); font-size: .9rem; padding: 8px 16px 24px; }

@media (max-width: 800px) {
  body { padding-bottom: 84px; }
  .hero { grid-template-columns: 1fr; gap: 16px; }
  .stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .stat { min-width: 0; padding: 10px; }
  .stat span { display: block; font-size: .8rem; line-height: 1.25; }
  .nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 5; justify-content: space-around; gap: 0; background: var(--superficie); border-top: 1px solid var(--borda); padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); }
  .nav a { flex-direction: column; gap: 2px; padding: 6px 12px; font-size: .8rem; border-radius: 14px; }
  .grade, .grade.dois { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}