body {
  font-family: Arial, sans-serif;
  background: #f4f6f9;
  margin: 0;
  color: #000;
  line-height: 1.6;
}
.skip-link {
  position: absolute;
  left: -1000px;
}
.skip-link:focus {
  left: 10px;
  top: 10px;
  background: #000;
  color: #fff;
  padding: 8px;
}
header {
  background: #9b1c1f;
  color: white;
  padding: 20px;
  text-align: center;
}
header img {
  max-width: 90px;
  margin-bottom: 10px;
}
.container {
  max-width: 1000px;
  margin: auto;
  padding: 15px;
}
.alert {
  background: #fff3cd;
  border-left: 6px solid #ffc107;
  padding: 15px;
}
.img-centrada {
  display: block;
  margin: 0 auto;
}
.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 15px;
}
.options button {
  padding: 15px;
  font-size: 16px;
  background: #9b1c1f;
  color: #fff;
  border: none;
  border-radius: 6px;
}
.options button:focus {
  outline: 3px solid #000;
}
.content {
  display: none;
  background: #fff;
  margin-top: 20px;
  padding: 20px;
  border-radius: 6px;
}
footer {
  text-align: center;
  font-size: 13px;
  padding: 15px;
}