style.css

body {
    background-color: whitesmoke;
  }
  * {
    margin: 0;
    padding: 0;
    font-family: "Inter", sans-serif;
  }
  
  
 header {
   background-color: black;
   color: white;
   position: sticky;
   overflow:hidden;
   top: 0;
   width: 100%;
 }
li {
    display: inline;
    font-size: 25px;
    padding: 12px;
    float: right;
  }
#content-wrapper {
    background: white;
    display: flex;
    flex-direction: column;
    min-height: 80vh;
    width: 50vw;
    margin: 4em auto;
    padding: 2.5em;
  }
  table,
  th,
  td {
    border: 1px solid rgb(230 224 224);
  }
  table {
    background-color: white;
    width: 50vw;
    border-collapse: collapse;
    margin: 0 auto;
    height: 15vh;
  }
  .innertable {
    width: 90%;
    margin: 5px 10px;
    padding: 10 px;
  }
  td a {
    color: blue;
    text-decoration: underline;
  }
  .cap {
    text-align: left;
    font-size: 25px;
    margin: 0 0 15px 0px;
    text-decoration-color: black;
  }
  a {
    text-decoration: none;
    color: white;
  }
  input{
    width: 50vw;
    padding: 10px;
    margin: 0 auto;
    display: inline-block;
    border: 1px solid rgb(230 224 224);
    background: #f1f1f1;
  }
  hr {
    border: 0px solid #f1f1f1;
    margin-bottom: 25px;
  }
  .registerbtn {
    background-color: black;
    color: white;
    padding: 10px;
    cursor: pointer;
    width: 51.6vw;
    opacity: 0.9;
  }