header {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 1rem 0;
  animation: headerBgChange 4s infinite alternate;
}
/* Animate header background color */

@keyframes headerBgChange {
  0% {
    background-color: #333;
  }
  100% {
    background-color: #007bff;
  }
}

header h1 {
  margin: 0;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem;
  background-color: #fff;
  border-radius: 5px;
}

#balance {
  text-align: center;
}

#balance h2 {
  margin: 0;
  font-size: 1.5rem;
}

#balance-amount {
  color: #28a745;
}

#transactions h2,
#add-transaction h2 {
  font-size: 1.2rem;
  margin-top: 1rem;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  display: flex;
  justify-content: space-between;
  margin: 0.5rem 0;
  padding: 0.5rem;
  border: 1px solid #ccc;
  background-color: #fff;
  border-radius: 5px;
  animation: listItemFadeIn 0.5s ease-in-out;
}
/* Animate transaction list items */

@keyframes listItemFadeIn {
  0% {
    opacity: 0;
    transform: translateY(-10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.income {
  color: #28a745;
}

.expense {
  color: #dc3545;
}

label,
input,
select,
button {
  display: block;
  margin-bottom: 0.5rem;
}

input[type='text'],
input[type='number'],
select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  background-color: #007bff;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

button:hover {
  background-color: #0056b3;
  transform: scale(1.05);
  transition: background-color 0.3s, transform 0.3s;
}