body {
  margin: 0;
  background: linear-gradient(135deg, #1a1a1a, #111);
  color: white;
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  flex-direction: column;
}
.contenedor { text-align: center; }
.panel {
  display: grid;
  grid-template-columns: repeat(2, 100px);
  gap: 20px;
  margin: 30px auto;
}
.circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  opacity: 0.6;
  cursor: pointer;
  transition: 0.3s;
  box-shadow: 0 0 10px #000;
}
.circle.rojo { background: #e74c3c; }
.circle.azul { background: #3498db; }
.circle.verde { background: #2ecc71; }
.circle.amarillo { background: #f1c40f; }
.circle.activo {
  opacity: 1;
  transform: scale(1.1);
  box-shadow: 0 0 25px white;
}
.botonera { margin-top: 20px; }
button {
  padding: 10px 20px;
  font-size: 1em;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  background-color: #2980b9;
  color: white;
}
button:hover { background-color: #1f618d; }
.resumen {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
}
.oculto { display: none; }

body.light-mode .secuencia-container {
  background: linear-gradient(to right, #ffecd2, #fcb69f);
  color: #333;
}

body.light-mode .circle {
  filter: brightness(1.2);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

body.light-mode h1 {
  color: #333;
}

body.light-mode .botonera button {
  background-color: #4a90e2;
  color: white;
}

body.light-mode .info p {
  color: #444;
}