body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
}

header {
  background-color: #4caf50;
  color: white;
  padding: 10px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

header .login_ p {
  margin: 0;
}

header button {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
  border-radius: 5px;
}

#mainContainer {
  display: flex;
  margin-top: 20px;
}

#aside {
  width: 30%;
  background-color: #fff;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#aside > a {
  display: block;
  padding: 10px;
  margin-bottom: 10px;
  background-color: #e4e4e4;
  color: #333;
  text-decoration: none;
  border-radius: 5px;
}

#aside a.active {
  font-weight: bold;
  color: #fff;
  background-color: #4caf50;
}

#main {
  flex: 1;
  padding: 20px;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
}

.form-group input {
  width: calc(100% - 22px);
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
}

.form-group button {
  width: 100%;
  padding: 10px;
  background-color: #4caf50;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
  border-radius: 5px;
}

.form-group button:hover {
  background-color: #45a049;
}

.product {
  background-color: #fff;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border-radius: 5px;
}

.product h3 {
  margin-top: 0;
}

.product img {
  max-width: 100%;
  border-radius: 5px;
}

.cart-items .product {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.total-price {
  font-size: 20px;
  font-weight: bold;
  margin-top: 20px;
}

button {
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #45a049;
}