* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
:root {
  --menu-speed: 0.75s;
}
body {
  font-family: "Roboto";
  line-height: 1.4;
  background: url("https://www.jqueryscript.net/dummy/1.jpg") no-repeat center center/cover;
   height: 100vh;
  width: 100vw;
  overflow: hidden;
}
main {
  margin: 150px auto;
  max-width: 768px;
  padding: 2rem;
  background-color: #fafafa;
  border-radius: 3px;
  text-align: center;
}