body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background: #333;
  color: white;
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav a {
  color: white;
  margin-right: 10px;
  text-decoration: none;
}

main {
  padding: 20px;
}

form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

form input,
form select {
  padding: 5px;
  flex: 1 1 150px;
}

button {
  cursor: pointer;
  padding: 5px 10px;
  border: none;
  background: #007bff;
  color: white;
  border-radius: 5px;
}

button:hover {
  background: #0056b3;
}

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

li {
  background: #f4f4f4;
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.msg {
  color: green;
  margin-top: 10px;
  font-weight: bold;
}