body {
  margin: 0;
  font-family: futura-pt, sans-serif;
  color: #1d1d1d;
  -webkit-font-smoothing: antialiased;

}

h1,
h2,
h3,
h4,
h5,
h6,
b,
strong {
  margin: 0;
  font-family: itc-avant-garde-gothic-pro, sans-serif;
}

h2 {
  font-size: 30px;
}

a {
  text-decoration: none;
  color: #1d1d1d;
}

button:active,
button:focus {
  outline: none;
  border: none;
}

.twst-logo {
  margin: 60px 60px 0;
  width: 70px;
}

.twst-contact {
  position: absolute;
  bottom: 0;
  left: 0;
  margin: 0 60px 60px;
}

.twst-contact > a {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.twst-box {
  position: relative;
  height: 100vh;
  width: 50vw;
  float: left;
}

.twst-box--right:hover .twst-content > button {
  margin-top: 20px;
  opacity: 1;
  visibility: visible;
}

.twst-box--yellow {
  background-color: #ffd700;
}

.twst-content {
  position: absolute;
  top: 50%;
  left: 50%;
  text-align: center;
  transform: translate( -50%, -50%);
}

.twst-content > button {
  position: absolute;
  top: 100%;
  left: 50%;
  width: 54px;
  height: 54px;
  line-height: 54px;
  margin-top: 30px;
  background-color: #ffffff;
  border: none;
  border-radius: 50%;
  font-size: 18px;
  box-shadow: 0 10px 10px 0 rgba(0,0,0,0.3);
  transform: translate( -50%, 0);
  opacity: 0;
  visibility: hidden;
  transition-property: all;
  transition-duration: 0.2s;
  transition-timing-function: ease-out;
}

.twst-pseudo-banner {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

@media only screen and ( max-width: 768px ) {

  .twst-box {
    height: 50vh;
    width: 100vw;
  }

  .twst-logo {
    margin: 60px 60px 0;
  }

  .twst-contact {
    margin: 0 60px 60px;
  }

  .twst-content > button {
    position: static;
    width: 48px;
    height: 48px;
    line-height: 48px;
    margin-top: 20px;
    opacity: 1;
    visibility: visible;
    transform: none;
  }
}

@media only screen and ( max-width: 480px ) {
  .twst-logo {
    margin: 30px 30px 0;
  }

  .twst-contact {
    margin: 0 30px 30px;
  }

  h2 {
    font-size: 24px;
  }
}