body {
  background: #111;
  color: white;
  font-family: sans-serif;
  padding: 20px;
}

h2 {
  text-align: center;
  margin-bottom: 30px;
}

.mesa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.mesa-box {
  padding: 15px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 0 10px #000;
  position: relative;
}

.mesa-box.verde {
  background-color: #2e7d32;
}

.mesa-box.amarela {
  background-color: #fbc02d;
  color: #000;
}

.mesa-box.vermelha {
  background-color: #c62828;
}

.acoes a {
  display: inline-block;
  margin: 5px;
  padding: 5px 10px;
  background: #333;
  color: #fff;
  border-radius: 5px;
  text-decoration: none;
  font-size: 14px;
}

.btn-alerta {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: red;
  color: white;
  font-size: 18px;
  padding: 5px 8px;
  border-radius: 50%;
  animation: piscar 1s infinite;
}

@keyframes piscar {
  0% { opacity: 1; }
  50% { opacity: 0.3; }
  100% { opacity: 1; }
}