:root {
  --azul: #0d47a1; --azul2: #1976d2; --mar: #e3f2fd; --mar2: #bbdefb; --verde: #2e7d32; --vermelho: #c62828;
  --amarelo: #ffca28; --tinta: #1a2233; --fundo: #f3f7fc; --cartao: #ffffff; --borda: #d6e2f0; --sub: #5b6b82;
}
@media (prefers-color-scheme: dark) {
  :root { --mar: #13294b; --mar2: #1c3a66; --tinta: #e8eef8; --fundo: #0b1424; --cartao: #12203a; --borda: #233a5e; --sub: #9fb3cf; }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--fundo); color: var(--tinta); min-height: 100vh; }
button, input { font: inherit; }
.topo { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; padding-top: max(10px, env(safe-area-inset-top)); background: var(--azul); color: #fff; }
.marca { color: #fff; text-decoration: none; font-size: 18px; }
.status { font-size: 13px; opacity: .9; text-align: right; }
main { max-width: 980px; margin: 0 auto; padding: 16px; padding-bottom: max(24px, env(safe-area-inset-bottom)); }
.cartao { background: var(--cartao); border: 1px solid var(--borda); border-radius: 18px; padding: 18px; margin-bottom: 16px; box-shadow: 0 2px 10px rgba(13, 71, 161, .06); }
.centro { text-align: center; }
.centro .linha { justify-content: center; }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 0 0 10px; }
h3 { font-size: 15px; margin: 14px 0 8px; color: var(--sub); }
.sub { color: var(--sub); margin: 6px 0 10px; }
.erro { color: var(--vermelho); font-weight: 600; margin: 6px 0 10px; }
.rotulo { display: block; font-weight: 700; margin: 12px 0 6px; }
.linha { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.botoes { margin-top: 14px; }
.campo { flex: 1; min-width: 0; width: 100%; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--borda); background: var(--fundo); color: var(--tinta); font-size: 17px; }
.linha .campo { width: auto; }
.campo:focus { outline: none; border-color: var(--azul2); }
.codigo, .palavra-campo { text-transform: uppercase; letter-spacing: 3px; font-weight: 800; }
.botao { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 12px 16px; border-radius: 12px; border: 0; background: var(--azul2); color: #fff; font-weight: 800; cursor: pointer; text-decoration: none; }
.botao:disabled { opacity: .45; cursor: not-allowed; }
.botao.grande { padding: 14px 20px; font-size: 17px; }
.botao.claro { background: var(--mar2); color: var(--tinta); }
.botao.verde { background: #25a244; }
section > .botao.grande { margin-top: 16px; width: 100%; }
.chip { padding: 9px 14px; border-radius: 999px; border: 2px solid var(--borda); background: transparent; color: var(--tinta); font-weight: 700; cursor: pointer; }
.chip.ativo { background: var(--azul2); border-color: var(--azul2); color: #fff; }
.codigo-grande { font-size: 40px; font-weight: 900; letter-spacing: 8px; margin: 10px 0; color: var(--azul2); }
.pulsando { animation: pulsa 1.6s ease-in-out infinite; }
@keyframes pulsa { 50% { opacity: .45; } }
.regras ol { margin: 0; padding-left: 20px; line-height: 1.6; }

/* tabuleiro 8x8 com letras/números nas bordas */
.grade { --t: min(40px, calc((100vw - 80px) / 9)); display: grid; grid-template-columns: calc(var(--t) * .7) repeat(var(--n), var(--t)); grid-auto-rows: var(--t); gap: 3px; justify-content: center; margin: 10px auto; user-select: none; }
.grade.pequena { --t: min(30px, calc((100vw - 80px) / 9)); }
.grade .eixo, .grade .canto { display: grid; place-items: center; font-size: 12px; font-weight: 700; color: var(--sub); }
.casa { border: 0; border-radius: 7px; background: var(--mar); color: var(--tinta); font-weight: 900; font-size: calc(var(--t) * .5); padding: 0; display: grid; place-items: center; }
.casa:disabled { cursor: default; color: var(--tinta); opacity: 1; }
.casa.mira { cursor: crosshair; }
.casa.mira:hover { background: var(--mar2); outline: 2px solid var(--azul2); }
.casa.minha { background: var(--amarelo); color: #3a2a00; }
.casa.atingida { background: var(--vermelho); color: #fff; }
.casa.acerto { background: var(--verde); color: #fff; animation: estoura .35s ease-out; }
.casa.agua { color: var(--azul2); font-size: calc(var(--t) * .6); }
@keyframes estoura { 0% { transform: scale(.4); } 70% { transform: scale(1.15); } 100% { transform: scale(1); } }

.fichas { margin: 8px 0; min-height: 44px; }
.ficha { min-width: 42px; height: 44px; border-radius: 10px; border: 2px solid var(--azul2); background: var(--cartao); color: var(--tinta); font-weight: 900; font-size: 20px; cursor: pointer; }
.ficha.sel { background: var(--azul2); color: #fff; transform: translateY(-3px); }
.ficha.posta { opacity: .35; }
.espacos { display: flex; gap: 6px; justify-content: center; margin: 8px 0 12px; }
.espaco { width: 42px; height: 48px; border-bottom: 4px solid var(--azul2); display: grid; place-items: center; font-size: 26px; font-weight: 900; }
.espaco.cheio { animation: estoura .25s ease-out; }
.palavra { letter-spacing: 3px; font-size: 18px; }

.vez { text-align: center; padding: 12px; border-radius: 14px; margin-bottom: 14px; font-weight: 800; background: var(--mar2); }
.vez.minha { background: var(--verde); color: #fff; animation: pulsa 2s ease-in-out infinite; }
.jogo { display: grid; grid-template-columns: 1.3fr 1fr; gap: 16px; align-items: start; }
.jogo .cartao { margin-bottom: 0; }
@media (max-width: 760px) { .jogo { grid-template-columns: 1fr; } }
.historico ul { list-style: none; padding: 0; margin: 0; font-weight: 600; line-height: 1.8; }
.revelado { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.vitoria { background: linear-gradient(180deg, #fff8e1, var(--cartao)); }
@media (prefers-color-scheme: dark) { .vitoria { background: linear-gradient(180deg, #3a2f0b, var(--cartao)); } }

.aviso { position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom)); transform: translateX(-50%); max-width: calc(100vw - 32px); background: #1a2233; color: #fff; padding: 12px 18px; border-radius: 14px; font-weight: 700; box-shadow: 0 6px 24px rgba(0, 0, 0, .3); z-index: 20; text-align: center; transition: opacity .2s; }
.aviso.escondido { opacity: 0; pointer-events: none; }