* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: -apple-system, system-ui, sans-serif;
  background: #c6c6c6;
  color: #1a1a1a;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

#app {
  width: 100%;
  max-width: 380px;
  padding: 16px;
  text-align: center;
  --celula: 34px;
}

.topo h1 {
  margin: 0 0 8px;
  font-size: 1.3rem;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

#bandeiras {
  font-weight: 700;
  font-size: 1.1rem;
  background: #1a1a1a;
  color: #ff4d4d;
  padding: 6px 12px;
  border-radius: 6px;
  font-family: monospace;
}

.mensagem {
  font-weight: 700;
  margin: 0 0 12px;
  padding: 8px;
  border-radius: 8px;
  background: #fff3b0;
}

.area-jogo {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}

.tabuleiro {
  display: grid;
  gap: 2px;
  background: #7b7b7b;
  border: 4px solid #7b7b7b;
  border-radius: 4px;
  padding: 2px;
}

.carregando {
  padding: 40px 20px;
  color: #4a4a4a;
  font-size: 0.9rem;
}

.celula {
  width: var(--celula);
  height: var(--celula);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: 2px;
  cursor: pointer;
  user-select: none;
}

.celula.oculta {
  background: #b8b8b8;
  box-shadow: inset 2px 2px 0 rgba(255, 255, 255, 0.6), inset -2px -2px 0 rgba(0, 0, 0, 0.25);
}

.celula.revelada {
  background: #d8d8d8;
  cursor: default;
}

.celula.mina {
  background: #ff6b6b;
}

.numero-1 { color: #1565c0; }
.numero-2 { color: #2e7d32; }
.numero-3 { color: #c62828; }
.numero-4 { color: #6a1b9a; }
.numero-5 { color: #ff8f00; }
.numero-6 { color: #00838f; }
.numero-7 { color: #212121; }
.numero-8 { color: #757575; }

.botao {
  border: none;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  padding: 12px 18px;
  font-size: 0.95rem;
}

.botao-novo {
  background: #1a1a1a;
  color: #fff;
}

.botao-modo {
  background: #5a6b7d;
  color: #fff;
  width: 100%;
  margin-bottom: 8px;
}

.botao-modo.ativo {
  background: #d64550;
}

.instrucoes {
  color: #4a4a4a;
  font-size: 0.78rem;
}