* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Segoe UI', Roboto, sans-serif;
  background: #f4f6f9;
  padding: 20px;
  max-width: 800px;
  margin: auto;
}
header {
  background: #cc0000;
  color: white;
  padding: 15px;
  border-radius: 12px;
  text-align: center;
  margin-bottom: 20px;
}
header h1 { font-size: 24px; }
menu {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 30px;
}
menu a {
  display: block;
  background: white;
  padding: 20px 10px;
  border-radius: 12px;
  text-align: center;
  text-decoration: none;
  font-weight: bold;
  color: #cc0000;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  font-size: 18px;
  transition: 0.2s;
}
menu a:active { transform: scale(0.95); }
.protocolo {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}
.protocolo h2 { color: #cc0000; margin-bottom: 10px; }
.protocolo ul, .protocolo ol { padding-left: 20px; margin: 10px 0; }
.boton-volver {
  display: inline-block;
  background: #cc0000;
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  margin-top: 15px;
}
@media (max-width: 480px) {
  menu { grid-template-columns: 1fr; }
}