body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f6f8;
  display: flex;
  justify-content: center;
  padding-top: 60px;
}

.todo-container {
  background: white;
  padding: 30px;
  border-radius: 12px;
  width: 300px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

.input-section {
  display: flex;
  gap: 10px;
}

input[type="text"] {
  flex: 1;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
}

button {
  padding: 10px 15px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background-color: #218838;
}

ul {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}

li {
  background-color: #f0f0f0;
  margin-bottom: 10px;
  padding: 10px 15px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li.completed {
  text-decoration: line-through;
  color: gray;
}

.delete-btn {
  background-color: crimson;
  border: none;
  color: white;
  padding: 5px 8px;
  border-radius: 5px;
  cursor: pointer;
}