html {
  scroll-behavior: smooth;
}

* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  max-width: 100%;
  font-family: Arial, Helvetica, sans-serif;
}

li {
  list-style: none;
}

a {
  color: white;
  text-decoration: none;
}

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  height: 100vh;
}

header {
  text-align: center;
  text-shadow: 1px 1px 2px black;
  margin: 20px 0;
}

.wrapper {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  border: 1px solid black;
  border-radius: 20px;
  width: 350px;
  padding: 10px 20px;
}

.link-border {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  width: 100%;
}
.link-border a {
  text-align: center;
  background-color: #0077ff;
  border-radius: 10px;
  width: 100%;
  margin: 10px 0;
  padding: 20px 50px;
}
.link-border a:hover {
  background-color: #3392ff;
}