* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

ul {
  list-style-type: none;
}

section:nth-child(even) {
  background-color: #f9f9f9;
}

header {
  background: -webkit-gradient(linear, left top, left bottom, from(#090a1185), to(#000000)), url("../images/bg/headerBg.jpg");
  background: linear-gradient(to bottom, #090a1185, #000000), url("../images/bg/headerBg.jpg");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  height: 100vh;
}

.position-fixed.scrolled {
  background-color: transparent !important;
  -webkit-transition: background-color 200ms linear;
  transition: background-color 200ms linear;
}