*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}

.container {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(90deg, #df3e3e 0%, #3F5EFB 100%);
    padding: 10px;
}

.todo-app {
    width: 100%;
    max-width: 540px;
    background-color: white;
    margin: 100px auto 20px;
    padding: 40px 30px 70px;
    border-radius: 10px;
}

.todo-app h2 {
    color: #0743a3;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

.todo-app h2 img {
    width: 35px;
    margin-left: 5px;
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #edeef0;
    border-radius: 30px;
    padding-left: 20px;
    margin-bottom: 25px;
}

.todo-app input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    padding: 10px;
}

.todo-app button {
    border: none;
    outline: none;
    padding: 15px 50px;
    background-color: #ff5945;
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 30px;
}

ul li {
    position: relative;
    list-style: none;
    font-size: 17px;
    padding: 13px 8px 12px 60px;
    user-select: none;
    cursor: pointer;
    
}

ul li::before{
    content: '';
    position: absolute;
    height: 38px;
    width: 38px;
    border-radius: 50%;
    background-image: url(unchecked.png);
    background-size: cover;
    background-position: bottom;
    top: 5px;
    left: 10px;
}

ul li.checked::before {
    background-image: url(checked.png);
    background-size: cover;
    background-position: bottom;
}

ul li.checked {
     text-decoration: line-through;
}

ul li span {
    position: absolute;
    right: 0px;
    top: 5px;
    width: 40px;
    height: 40px;
    font-size: 22px;
    color: #ff5945;
    line-height: 40px;
    text-align: center;
}

ul li span:hover {
    background: #edeef0;
    border-radius: 50%;
}