body {
  font-family: Georgia;
  background: white;
}
a {
  font-weight: bold;
  text-decoration: none;
}
h1,
h2 {
  text-align: center;
}
#contact {
    text-align: center;
    width: 500px;
    margin: auto;
}

@media screen and (width >= 650px) {
  #welcome, #musicwelcome, #videowelcome {
    text-align: center;
    width: 500px;
    margin: auto;
  }

  .vidblock {
    width: 160px;
    text-align: center;
    display: inline-block;
    margin: 10px;
    vertical-align: top;
  }

  .vidgrid {
    text-align: center;
    width: 600px;
    margin: auto;
  }
  .vidwindow {
    width: 560px;
    margin: auto;
  }
  .viddetails {
    text-align: center;
    width: 500px;
    margin: auto;
  }
    .musicvids {
    width: 404px;
    text-align:center;
    margin: auto;
  } 
}

@media screen and (width <= 650px) {
  #welcome, #musicwelcome, #videowelcome {
    text-align: center;
    width: 100%;
    margin: auto;
  }

  .vidblock {
    width: 30%;
    text-align: center;
    display: inline-block;
    margin: 25px;
    vertical-align: top;
  }

  .vidgrid {
    text-align: center;
    width: 100%;
    margin: auto;
  }
  .vidwindow {
    width: 95%;
    margin: auto;
  }
  .viddetails {
    text-align: center;
    width: 100%;
    margin: auto;
  }
  .musicvids {
    width: 404px;
    text-align:center;
    margin: auto;
  }  
}