saikyo.css

html {
  font-size: 50%;
}
video {
  width:50%;
}
body {
    margin-top: 20px;
    margin-bottom: 20px;
    margin-left: 30px;
    margin-right: 30px;
}
select{
  height:30px;
}
@media screen and (min-width: 768px) {
  html {
    font-size: 75%;
  }
   body {
    margin-top: 30px;
    margin-bottom: 30px;
    margin-left: 70px;
    margin-right: 70px;
  }
    select{
    height:25px;
  }
}
@media screen and (min-width: 1024px) {
  html {
    font-size: 100%;
  }
  body {
    margin-top: 50px;
    margin-bottom: 50px;
    margin-left: 100px;
    margin-right: 100px;
  }
  select{
    height:50px;
  }
}

body {
    background-color: white;
    color: black;
}

input {
    width:50px
}

button {
    width: 100px;
    background-color: white;
    display: inline-block;
    padding: 0.3em 1em;
    text-decoration: none;
    color: black;
    border: solid 2px black;
    border-radius: 3px;
    transition: .4s;
}

button:hover {
    color: white;
    background: black;
}