body {
  padding: 16px;
  margin: 0;
  display: flex;
  justify-content: center;
}

h1 {
  text-decoration: underline;
  margin-top: 0;
}

.contenedor {
  background: white;
  padding: 40px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  max-width: 500px;
  width: 100%;
}

.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
}

input[type="text"] {
  flex: 1;
  padding: 12px 15px;
  font-size: 16px;
  border: 2px solid #ddd;
  border-radius: 5px;
  outline: none;
  transition: border-color 0.3s;
}

input[type="text"]:focus {
  border-color: #f5576c;
}

#btnAgregar {
  padding: 12px 25px;
  font-size: 16px;
  background-color: #f5576c;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
  transition: all 0.3s;
}

#btnAgregar:hover {
  background-color: #e04055;
  transform: translateY(-2px);
}

#btnAgregar:active {
  transform: translateY(0);
}

#lista {
  list-style: none;
  padding: 0;
  margin: 0;
}

#lista li {
  background-color: #f8f9fa;
  padding: 15px;
  margin-bottom: 10px;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-left: 4px solid #f5576c;
  animation: aparecer 0.3s ease;
}

@keyframes aparecer {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

#lista li span {
  flex: 1;
  word-break: break-word;
}

.btnEliminar {
  padding: 8px 15px;
  background-color: #dc3545;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
  margin-left: 10px;
}

.btnEliminar:hover {
  background-color: #c82333;
  transform: scale(1.05);
}

.volver {
  display: block;
  text-align: center;
  margin-top: 30px;
  padding: 10px 20px;
  background-color: #f5576c;
  text-decoration: none;
  color: white;
  border-radius: 5px;
  font-weight: bold;
  transition: background-color 0.3s;
}

.volver:hover {
  background-color: #e04055;
}