*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    display: flex;
    align-items: center;
    justify-content: center;
}
h1{
    font-family: sans-serif;
    font-size: 50px;
    font-weight: 900;
    padding-top: 50px;
}
.content{
    padding-top: 100px;
}
.content label{
    font-weight: bold;
    font-size: 22px;
}
.content input[type="text"]{
    width: 280px;
    height: 45px;
    padding-left: 17px;
    font-size: 17px;
    border-radius: 25px;
    outline: none;
    transition: .2s ease;
    border: 1px solid black;
}
input[type="text"]:focus{
    border: 2px solid rgb(9, 180, 9);
}
input[type="submit"]{
    cursor: pointer;
    border: none;
    outline: none;
    padding: 13px 29px;
    border-radius: 25px;
    background: rgb(9, 180, 9);
    margin: 0 10px;
    font-size: 17px;
    font-weight: bold;
    color: white;
}
.to-do{
    max-width: 500px;
    display: flex;
    flex-direction: column;
    margin-top: 25px;
    border: 1px solid black;
    margin-bottom: 20px;
}
.to-do div{
    display: flex;
    max-width: 320px;
    height: 40px;
    margin: 15px 80px;
    align-items: center;
}
.to-do div > li{
    margin: 15px 20px;
    list-style: none;
    font-size: 17px;
    font-weight: bold;
    font-family: sans-serif;
}
.to-do button{
    cursor: pointer;
    border: none;
    outline: none;
    padding: 9px 13px;
    border-radius: 25px;
    background: rgb(223, 21, 21);
    font-size: 15px;
    font-weight: bold;
    color: white;
}