body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f4f9;
  color: #333;
  margin: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  color: #4caf50;
}

input[type="text"],
input[type="date"] {
  padding: 10px;
  width: 200px;
  border: 1px solid #ccc;
  border-radius: 5px;
  margin-right: 10px;
}

button {
  padding: 10px 15px;
  border: none;
  border-radius: 5px;
  background-color: #4caf50;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s;
}

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

ul {
  list-style-type: none;
  padding: 0;
  width: 100%;
  max-width: 400px;
}

.task {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: white;
  padding: 10px;
  margin-bottom: 10px;
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.completed {
  text-decoration: line-through;
  color: #888;
}

.task div {
  display: flex;
  gap: 5px;
}