.nist {
  margin: 0;
  padding: 0;
}
.nist-header {
  box-sizing: border-box;
  background: #000;
  color: #fff;
  padding: 10px 20px 4px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  position: relative;
  margin-bottom: 0px;
}
.nist-header:after {
  content: "";
  display: table;
  clear: both;
}
.nist-header * {
  box-sizing: inherit;
}
.nist-header a, .nist-header a:link, .nist-header a:visited {
  color: #EEE;
  text-decoration: none;
}
.nist-header h1 {
  margin: 0 10px 0 0;
  float: left;
  font-size: 0;
}
.nist-header h1 a {
  font-weight: normal;
  font-size: 20px;
  height: 40px;
  width: 280px;
  background: url('nist_logo.png') no-repeat;
  background-size: 280px auto;
  text-indent: -9999px;
  overflow: hidden;
  display: inline-block;
}
.nist-header-text {
  position: absolute;
  left: -9999px;
  background: yellow;
}
.nist-links {
  float: right;
}
a.nist-links-button {
  display: inline-block;
  padding: 6px;
  margin: 0 2px;
  border-radius: 3px;
  border: 1px solid #666;
  font-size: 14px;
}
.nist-header a.nist-links-button:hover,
.nist-header a.nist-links-button:focus {
  background: #ccc;
  color: #333;
}

@media screen and (max-width: 700px) {
  .nist-header {
    padding: 6px 10px;
  }
  .nist-header h1 a {
    height: 26px;
    width: 80px;
    background: url('nist_logo_mark.png') 0 4px no-repeat;
    background-size: 80px auto;
  }
  .mobile-hide {
    display:none !important;
  }
}