.container {
  max-width: 500px;
  margin: 0 auto;
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.container.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Estilos para el selector de idioma con banderas */
.lang-switch {
  text-align: right;
  margin-bottom: 10px;
}

.lang-option {
  display: inline-block;
  cursor: pointer;
  margin-left: 5px;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.lang-option:hover,
.lang-option.active {
  opacity: 1;
}

.lang-option img {
  vertical-align: middle;
  border: 1px solid #ccc;
  border-radius: 3px;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

input[type="number"],
select {
  width: 100%;
  padding: 8px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  transition: box-shadow 0.3s ease;
}

input[type="number"]:focus,
select:focus {
  box-shadow: 0 0 8px rgba(6,48,95,0.5);
  outline: none;
}

button {
  display: block;
  width: 100%;
  padding: 10px;
  background-color: #06305F;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

button:hover {
  background-color: #041e3d;
  transform: scale(1.02);
}

.result {
  margin-top: 20px;
  text-align: center;
  font-size: 1.2rem;
  font-weight: bold;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.result.visible {
  opacity: 1;
}