html {
  background:  url(../images/flicker.gif) no-repeat center center fixed;
  background-size: cover;
}

#container {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  height: 100%;
}

.button {
    display: block;
    min-width: 150px;
    display: block;
    margin: 1em;
    background: none;
    vertical-align: middle;
    position: relative;
    z-index: 1;
    font-size: 16px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: 40px;
    border: 3px solid;
    color: #ECEFF1;
    border-color: #ECEFF1;
    text-decoration: none;
    font-family: 'Raleway', sans-serif;
    transition: border-color 0.3s, color 0.3s;
    align-self: flex-start;
    margin-top: 60vh;
    font-weight: 700;
}

.button:hover {
  border-color: #ff0000;
  color: #ff0000;
}

.button span {
  padding: 1em 2em;
  display: block;
  vertical-align: middle;
}

@media only screen and (max-device-width: 768px) {
    /* For mobile phones: */
    .button {
      font-size: 2.5em;
      font-weight: 600;
      border: 6px solid;
      border-radius: 40em;
      margin-top: 55vh;
    }
}