:root {
  --fundo: #0d141f;
  --fundo-2: #131d2b;
  --cartao: #1a2536;
  --borda: #27364d;
  --texto: #e9eff7;
  --texto-fraco: #93a4bd;
  --acento: #f0b429;
  --acento-2: #4f8ef7;
  --perigo: #e5484d;
  --sucesso: #3fb950;
  --raio: 14px;
  --sombra: 0 18px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, #1c2941 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 110%, #1a3040 0%, transparent 55%),
    var(--fundo);
  color: var(--texto);
  font-family: "Segoe UI", Roboto, system-ui, -apple-system, sans-serif;
}

.oculto { display: none !important; }

.topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 26px;
  border-bottom: 1px solid var(--borda);
  backdrop-filter: blur(6px);
}

.marca { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .3px; }

.logo-peca {
  width: 22px; height: 22px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #ffffff, #b9c6d6);
  box-shadow: inset 0 0 0 3px #6d1f3a;
}

.usuario { display: flex; align-items: center; gap: 12px; color: var(--texto-fraco); }

main { max-width: 1000px; margin: 30px auto 60px; padding: 0 20px; }

.tela { animation: surgir .25s ease; }
@keyframes surgir { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.cartao {
  background: linear-gradient(180deg, var(--cartao), var(--fundo-2));
  border: 1px solid var(--borda);
  border-radius: var(--raio);
  box-shadow: var(--sombra);
  padding: 22px;
}

.cartao-auth { max-width: 420px; margin: 40px auto; }

h2 { margin: 0 0 14px; font-size: 1rem; text-transform: uppercase; letter-spacing: .12em; color: var(--texto-fraco); }

.abas { display: flex; gap: 8px; margin-bottom: 18px; background: #101a27; padding: 6px; border-radius: 10px; }

.aba {
  flex: 1; padding: 10px; border: 0; border-radius: 8px; cursor: pointer;
  background: transparent; color: var(--texto-fraco); font-weight: 600; font-size: .92rem;
}
.aba.ativa { background: var(--acento); color: #22190a; }

.formulario { display: flex; flex-direction: column; gap: 14px; }
.formulario label { display: flex; flex-direction: column; gap: 6px; font-size: .85rem; color: var(--texto-fraco); }

input {
  padding: 12px 14px; border-radius: 10px; border: 1px solid var(--borda);
  background: #0f1826; color: var(--texto); font-size: 1rem; outline: none;
}
input:focus { border-color: var(--acento-2); box-shadow: 0 0 0 3px rgba(79, 142, 247, .18); }

.botao-primario, .botao-fantasma, .botao-perigo {
  padding: 12px 16px; border-radius: 10px; font-weight: 700; font-size: .95rem;
  cursor: pointer; border: 1px solid transparent; transition: transform .08s, filter .15s;
}
.botao-primario { background: var(--acento); color: #22190a; }
.botao-fantasma { background: transparent; color: var(--texto); border-color: var(--borda); }
.botao-perigo { background: transparent; color: var(--perigo); border-color: rgba(229, 72, 77, .45); }
.botao-primario:hover, .botao-fantasma:hover, .botao-perigo:hover { filter: brightness(1.08); }
.botao-primario:active { transform: scale(.98); }

.mensagem { min-height: 20px; margin: 0; color: var(--perigo); font-size: .88rem; }

.dica { margin: 0; color: var(--texto-fraco); font-size: .9rem; }

.colunas { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.colunas-jogo { display: grid; grid-template-columns: minmax(0, 620px) 1fr; gap: 20px; align-items: start; }

.lista-online, .historico { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }

.item-online, .item-historico {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 12px; border: 1px solid var(--borda); border-radius: 10px; background: #101a27;
}

.ponto-online { width: 9px; height: 9px; border-radius: 50%; background: var(--sucesso); box-shadow: 0 0 8px var(--sucesso); }

.placar { display: flex; gap: 10px; margin-bottom: 18px; }
.placar div { flex: 1; text-align: center; padding: 12px; border-radius: 10px; background: #101a27; border: 1px solid var(--borda); }
.placar strong { display: block; font-size: 1.5rem; }
.placar span { font-size: .78rem; color: var(--texto-fraco); text-transform: uppercase; letter-spacing: .08em; }

.faixa-jogo { display: flex; justify-content: space-between; margin-bottom: 12px; font-weight: 600; }
#vezJogo { color: var(--acento); }

.tabuleiro {
  display: grid; grid-template-columns: repeat(8, 1fr);
  aspect-ratio: 1 / 1; width: 100%;
  border-radius: var(--raio); overflow: hidden;
  border: 1px solid var(--borda); box-shadow: var(--sombra);
}

.casa { position: relative; display: flex; align-items: center; justify-content: center; }
.casa-clara { background: #182432; }
.casa-escura { background: #2c3d55; }

.destino { cursor: pointer; }
.destino::after {
  content: ""; position: absolute; inset: 26%; border-radius: 50%;
  background: rgba(63, 185, 80, .35); border: 2px solid var(--sucesso);
}

.peca {
  width: 68%; height: 68%; border-radius: 50%; z-index: 1;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, .5), inset 0 -3px 6px rgba(0, 0, 0, .35);
}
.peca-branca { background: radial-gradient(circle at 32% 28%, #ffffff, #b9c6d6); }
.peca-preta { background: radial-gradient(circle at 32% 28%, #7d2740, #43101f); }
.peca.dama::after {
  content: ""; width: 40%; height: 40%; border-radius: 50%;
  border: 2px solid var(--acento); box-shadow: 0 0 8px rgba(240, 180, 41, .7);
}
.peca.minha.selecionada { outline: 3px solid var(--acento); outline-offset: 2px; }
.peca.minha { cursor: pointer; }

.painel-lateral .info-partida { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; color: var(--texto-fraco); }

.modal {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(6, 11, 18, .72); backdrop-filter: blur(3px); z-index: 20;
}
.modal-conteudo { max-width: 380px; width: 90%; text-align: center; }
.modal-conteudo .acoes { display: flex; gap: 10px; margin-top: 18px; }
.modal-conteudo .acoes button { flex: 1; }

.aviso {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--cartao); border: 1px solid var(--borda); color: var(--texto);
  padding: 12px 18px; border-radius: 10px; box-shadow: var(--sombra); z-index: 30;
}

@media (max-width: 760px) {
  .colunas, .colunas-jogo { grid-template-columns: 1fr; }
  .topo { padding: 14px 16px; }
}