style.css

*{
    margin: 0px;
    padding: 0px;
}
#tittle {
    font-style: normal;
    font-family: sans-serif;
    color: red;
    text-align: center;
    margin-top: 0px;
}
#tittle :hover{
    font-style: normal;
    font-family: sans-serif;
    color:peru;
    text-align: center;
    margin-top: 0px;
}

.first {
    width: auto;
    height: 10px;
    background-color: yellow;
    padding: 30px;
    border-radius: 20px;
    margin-top: 20px;
    margin-left: 20%;
    margin-right: 20%;
}
.second{
    width: auto;
    height: auto;
    background-color:aquamarine;
    padding: 30px;
    margin-top: 20px;
    margin-left: 20%;
    margin-right: 20%;
    border-radius: 20px;
}
#total-body{
    background-color: blanchedalmond;
    border-radius: 5px;
    color: black;
    font-size: 16px;
    font-family: sans-serif;
    font-style: italic;
    margin: 0%;

}
#list-container{
    background-color:aquamarine;
    color: black;
    font-size: 16px;
    font-family: sans-serif;
    font-style: italic;
    margin-top: 2%;
    margin-left: 20px;
    margin-right: 20px;
}
input{
    text-align: center;
    width: 60%;
    display: inline-block;
    height: 20px;
    margin-left: 20px;
}
.btn{
    border-radius: 1px;
    background-color:lightgreen;
    color: darkblue;
    padding: 2px;
    margin-left: 10px;
}