html, body {
  height: 100%;
}

body {
  background-color: #333;
  color: #999;
}

.center {
  text-align: center;
}

.content {
  min-height: 70%;
}

a, a:hover {
  display: inline-block;
  margin: 30px;
  color: #999;
}

nav {
  background-color: #222;
  margin-left: -15px;
  margin-right: -15px;
}

img.top-logo {
  width: 300px;
}

img.logo {
  filter: brightness(50%);
  transition: filter 0.5s ease;
  transition-delay: 0.5s;
  max-width: 100%;
}

img.logo-company {
  max-height: 50px;
}

img.logo:hover {
  filter: brightness(100%);
  transition: filter 0.25s ease;
}

.keymailer, .keymailer-top {
  border: none;
  width: 200px;
  height: 50px;
  margin-bottom: 20px;
}

.keymailer-top {
  position: absolute;
  z-index: 999;
  top: 15px;
  right: 15px;
}