body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background: #f0f0f0;
  display: flex;
  flex-direction: column;
  gap: 30px;
  align-items: center;
}
h1 {
  color: #333;
  text-align: center;
}
.contenedor {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.gemelo-container {
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  width: 300px;
  text-align: center;
}
.gemelo-viajero {
  background-color: #e0f2ff;
}
.gemelo-tierra {
  background-color: #f5f5f5;
  opacity: 0.8;
}
.gemelo {
  width: 80px;
  height: 80px;
  background: url('https://cdn-icons-png.flaticon.com/512/706/706830.png') no-repeat center/contain;
  margin: 0 auto 10px;
}
.reloj {
  width: 40px;
  height: 40px;
  background: url('https://cdn-icons-png.flaticon.com/512/61/61112.png') no-repeat center/contain;
  margin: 10px auto;
}
.reloj-animado {
  animation: girar 2s linear infinite;
}
@keyframes girar {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.botones {
  display: flex;
  gap: 10px;
}
.botones button {
  padding: 10px 20px;
  font-size: 1em;
  border: none;
  border-radius: 6px;
  background-color: #007BFF;
  color: white;
  cursor: pointer;
}
.botones button:hover {
  background-color: #0056b3;
}
#grafica {
  max-width: 600px;
}
.explicacion {
  max-width: 800px;
  text-align: left;
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}