body {
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 50px;
}

.todo-container {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    width: 350px;
}

h2 {
    text-align: center;
    padding-bottom: 20px;
}

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

li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    border-bottom: 1px solid white;
}

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

.delete-btn {
    background-color: red;
    margin-left: 10px;
}