body {
  background-color: #f4fafe;
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  color: #24292f;
}

header {
  background-color: #284b63;
  color: #fff;
  padding: 24px 0;
  text-align: center;
}

.autor {
  margin-top: 8px;
  font-size: 1.08em;
  color: #fff;
  font-weight: 600;
  text-align: center;
}


main {
  max-width: 920px;
  margin: 30px auto;
  padding: 15px;
}

.imagenes {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 32px;
}

.imagenes img {
  border-radius: 16px;
  max-width: 420px;
  height: auto;
  box-shadow: 0 4px 14px rgba(40,75,99,0.16);
  background: #fff;
  padding: 10px;
}

.opciones {
  display: flex;
  gap: 30px;
  justify-content: center;
  margin-bottom: 32px;
}

.boton {
  display: inline-block;
  font-size: 1.15em;
  background: #4099e5;
  color: white;
  padding: 12px 28px;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s;
  cursor: pointer;
}
.boton:hover {
  background: #235274;
}

.seccion-oculta {
  display: none;
  margin: 32px auto;
  padding: 24px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 8px #bbb5;
  max-width: 700px;
}

.submenu {
  display: flex;
  gap: 20px;
  justify-content: left;
  margin-top: 18px;
}

.subseccion-oculta {
  display: none;
  margin-top
  
.boton-volver {
  display: inline-block;
  margin: 30px auto 10px auto;
  background: #245174;
  border-radius: 7px;
  font-size: 1.05em;
  padding: 12px 34px;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  border: none;
  transition: background 0.18s;
}
.boton-volver:hover {
  background: #4099e5;
}