body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}

* {
  box-sizing: border-box;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 420px;
  text-align: center;
}

h1 {
  color: #0d47a1;
  margin-bottom: 20px;
}

select,
input,
button {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  transition: all 0.3s ease;
}

select:focus,
input:focus {
  border-color: #1976d2;
  outline: none;
  box-shadow: 0 0 6px rgba(25, 118, 210, 0.3);
}

button {
  background: #1976d2;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background: #1565c0;
}

.resultado {
  margin-top: 20px;
  font-size: 1.3rem;
  font-weight: bold;
  color: #0d47a1;
}