How do i line up the input

HTML-CSS
1

title says it how do line up the page input https://codepen.io/Gsimelus92/pen/QVXPPz

like this project https://codepen.io/freeCodeCamp/full/VPaoNP

2

Is that what you’re looking for?
Theres probably a better solution but that might send you somewhere in the right direction

Also. I believe Inputs need label tags.

form {
    background-color: rgb(191, 192, 192);
    margin-left: auto;
    margin-right: auto;
    padding: 100px;
    line-height: 2.3em;
    width: 50%;
     
}

input {
    border-radius: 20px;
    margin-left: auto;
    margin-right: auto;
    display: block;
      
}