@media screen and (max-width: 500px) {
    html {
        scroll-behavior: smooth;
        display: block;
        margin-left: auto;
        margin-right: auto;
        width: 90%;
    }
}

@media screen and (min-width: 500px) {
    html {
        scroll-behavior: smooth;
        display: block;
        margin-left: auto;
        margin-right: auto;
        width: 50%;
      }
    }

h1{
    text-align: center;
}

hr {
    border-color: rgb(209, 209, 209);
}

img {
    border-radius: 50%;
    text-align: center;
}

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 35%;
}

.topnav a {
    float: left;
    color: #000000;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    margin-left: auto;
    margin-right: auto;
    width: 25%;
  }

  .topnav a.active {
    font-weight: bold;
  }


  *, ::after, ::before {
    box-sizing: border-box;
}

ol {
    counter-reset: list;
}

ol > li {
    list-style: none;
    position: relative;
}

ol > li:before {
    content: "[" counter(list) "]";
    counter-increment: list;
    left: -40px;
    padding-right: 10px;
    position: absolute;
    text-align: right;
    width: 40px;
}