body {
  font-family: 'Segoe UI', sans-serif;
  background: #111827;
  color: #f9fafb;
  margin: 0;
  padding: 0;
}

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
}

h1 {
  font-size: 28px;
  margin-bottom: 20px;
  color: #facc15;
  text-align: center;
}

/* Buscador */
#buscador {
  width: 100%;
  max-width: 600px;
  margin: 0 auto 30px;
  padding: 14px 18px;
  font-size: 16px;
  border: 2px solid #374151;
  border-radius: 10px;
  background: #1f2937;
  color: #f9fafb;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

/* Botones de canciones */
#resultados button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  margin-bottom: 14px;
  background: #1f2937;
  border: 1px solid #374151;
  border-radius: 10px;
  font-size: 16px;
  transition: background 0.2s, transform 0.1s;
  cursor: pointer;
  color: #f9fafb;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

#resultados button:hover {
  background: #374151;
  transform: scale(1.01);
}

/* Botón deshabilitado */
#resultados button:disabled {
  background: #10b981;
  color: white;
  opacity: 0.9;
  cursor: default;
}

/* Botón de retorno */
a.btn {
  display: block;
  margin: 40px auto 0;
  padding: 14px 24px;
  background: #3b82f6;
  color: white;
  text-align: center;
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  max-width: 300px;
  transition: background 0.2s;
}

a.btn:hover {
  background: #2563eb;
}