* {
  box-sizing: border-box;
}

body {
  font-family: 'Helvetica', sans-serif;
}

h1, h2, h3, h4 {
  font-family: 'Red Hat Display', sans-serif;
}

.heading-container {
  margin: 35vh 10vw 0;
}

@media screen and (min-width: 768px) {
  .heading-container {
    margin-left: 20vw;
    margin-right: 20vw;
  }
}

.heading-container h1 {
  margin-top: 0;
}

.subhead {
  display: block;
  font-size: 0.5em;
}

a, a:visited, a:active {
  color: #666;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.btn-social {
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.5rem;
  width: 1.4rem;
  height: 1.4rem;
  overflow: hidden;
  text-indent: -999999px;
  line-height: 28px;
}

.btn-linkedin {
  background-image: url(../img/linkedin-icon.png);
  background-size: contain;
  background-repeat: no-repeat;
  filter: grayscale(100%) contrast(300%);
}

.btn-linkedin:hover {
  filter: none;
}