*, ::before, :after {
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

body {
  padding: 0;
  margin: 0;
  font-family: Helvetica, Arial, sans-serif;
  background-color: #373737;
}

#menu { overflow: hidden; }

#menu>* {
  display: block;
  overflow: hidden;
}

.menu-item {
  width: 25%;
  height: 100%;
  display: block;
  position: absolute;
  float: left;
  -webkit-transform: translateY(-100%);
  transform: translateY(-100%);
  transition: transform 300ms linear;
  will-change: transform;
  pointer-events: auto;
}

.menu-item.active {
  -webkit-transform: translateY(0%);
  transform: translateY(0%);
  transition: transform 300ms linear;
}

h1 {
  font-size: 2.9vw;
  color: #ffffff;
  top: 15%;
  width: 260px;
  text-transform: uppercase;
  text-align: center;
  margin-left: -130px;
  left: 50%;
  z-index: 100;
}

.menu-item p {
  opacity: 0;
  text-align: center;
  margin-left: -130px;
  left: 50%;
  z-index: 100;
  top: 30%;
  width: 280px;
  color: #ffffff;
  -webkit-transition: opacity 0.5s, height 0.4s;
  -moz-transition: opacity 0.5s, height 0.4s;
  transition: opacity 0.5s, height 0.4s;
}

.menu-item.menu-expanded p { opacity: 1; }

.menu-item>* {
  position: absolute;
  will-change: transform;
}
 @media screen and (max-width: 768px) {

.menu-horizontal .menu-item {
  width: 100%;
  float: none;
  position: relative;
  height: 250px;
  -webkit-transform: translateX(-100%);
  transform: translateX(-100%);
  transition: transform 300ms linear;
}

.menu-horizontal .menu-item.active {
  -webkit-transform: translateX(0%);
  transform: translateX(0%);
  transition: transform 300ms linear;
}
}

.menu-item:after {
  content: '';
  position: absolute;
  opacity: 0;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100%;
  background-image: url("https://unsplash.it/1800/1200?image=823");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  -webkit-transition: opacity 0.5s, height 0.4s;
  -moz-transition: opacity 0.5s, height 0.4s;
  transition: opacity 0.5s, height 0.4s;
}

.menu-item.menu-expanded:after {
  opacity: 1;
  -webkit-transform: scale(1);
  -moz-transform: scale(1);
  -ms-transform: scale(1);
  -o-transform: scale(1);
  transform: scale(1);
}

/* -------------------------------- 

Menu trigger

-------------------------------- */

h2 {
  color: #fff;
  position: absolute;
  left: 60%;
  top: 50px;
  -ms-transform: rotate(198deg);
  -webkit-transform: rotate(198deg);
  transform: rotate(198deg);
}

.arrow-container {
  height: 100px;
  width: 340px;
  position: absolute;
  -ms-transform: rotate(162deg);
  -webkit-transform: rotate(162deg);
  transform: rotate(162deg);
  right: 7%;
  top: 113px;
}

.arrow {
  background: url(arrow.png) no-repeat;
  width: 100%;
  height: 100%;
  -moz-transform: scaleX(-1);
  -o-transform: scaleX(-1);
  -webkit-transform: scaleX(-1);
  transform: scaleX(-1);
  filter: FlipH;
  -ms-filter: "FlipH";
}

.nav-trigger {
  position: absolute;
  z-index: 9999;
  top: 24px;
  right: 5%;
  height: 52px;
  width: 52px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.8);
  -webkit-transition: background 0.2s;
  -moz-transition: background 0.2s;
  transition: background 0.2s;
}

.nav-trigger .nav-icon, .nav-trigger .nav-icon::before, .nav-trigger .nav-icon::after {
  /* menu icon created in CSS */
  position: absolute;
  background-color: #ffffff;
  border-radius: 2px;
  /* Force Hardware Acceleration in WebKit */
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  -o-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.no-touch .nav-trigger:hover { background-color: black; }

.nav-trigger .nav-icon {
  /* middle line of the menu icon */
  display: inline-block;
  width: 18px;
  height: 2px;
  left: 50%;
  top: 50%;
  bottom: auto;
  right: auto;
  -webkit-transform: translateX(-50%) translateY(-50%);
  -moz-transform: translateX(-50%) translateY(-50%);
  -ms-transform: translateX(-50%) translateY(-50%);
  -o-transform: translateX(-50%) translateY(-50%);
  transform: translateX(-50%) translateY(-50%);
  -webkit-transition: -webkit-transform 0.3s, background-color 0.3s;
  -moz-transition: -moz-transform 0.3s, background-color 0.3s;
  transition: transform 0.3s, background-color 0.3s;
}

.nav-trigger .nav-icon::before, .nav-trigger .nav-icon::after {
  /* upper and lower lines of the menu icon */
  content: '';
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  -webkit-transition: -webkit-transform 0.3s;
  -moz-transition: -moz-transform 0.3s;
  transition: transform 0.3s;
}

.nav-trigger .nav-icon::before {
  -webkit-transform: translateY(-6px);
  -moz-transform: translateY(-6px);
  -ms-transform: translateY(-6px);
  -o-transform: translateY(-6px);
  transform: translateY(-6px);
}

.nav-trigger .nav-icon::after {
  -webkit-transform: translateY(6px);
  -moz-transform: translateY(6px);
  -ms-transform: translateY(6px);
  -o-transform: translateY(6px);
  transform: translateY(6px);
}

.nav-trigger.project-open .nav-icon { /* user selects a projects - transform the icon into a 'X' */
background-color: rgba(255, 255, 255, 0); }

.nav-trigger.project-open .nav-icon::before, .nav-trigger.project-open .nav-icon::after { background-color: white; }

.nav-trigger.project-open .nav-icon::before {
  -webkit-transform: translateY(0) rotate(45deg);
  -moz-transform: translateY(0) rotate(45deg);
  -ms-transform: translateY(0) rotate(45deg);
  -o-transform: translateY(0) rotate(45deg);
  transform: translateY(0) rotate(45deg);
}

.nav-trigger.project-open .nav-icon::after {
  -webkit-transform: translateY(0) rotate(-45deg);
  -moz-transform: translateY(0) rotate(-45deg);
  -ms-transform: translateY(0) rotate(-45deg);
  -o-transform: translateY(0) rotate(-45deg);
  transform: translateY(0) rotate(-45deg);
}

.nav-trigger.nav-visible .nav-icon {
  /* user opens the navigation - transform the icon into an arrow */
  -webkit-transform: translateY(-50%) translateX(-50%);
  -moz-transform: translateY(-50%) translateX(-50%);
  -ms-transform: translateY(-50%) translateX(-50%);
  -o-transform: translateY(-50%) translateX(-50%);
  transform: translateY(-50%) translateX(-50%);
}

.nav-trigger.nav-visible .nav-icon::after {
  -webkit-transform: translateX(5px) translateY(3px) rotate(-45deg) scaleX(0.5);
  -moz-transform: translateX(5px) translateY(3px) rotate(-45deg) scaleX(0.5);
  -ms-transform: translateX(5px) translateY(3px) rotate(-45deg) scaleX(0.5);
  -o-transform: translateX(5px) translateY(3px) rotate(-45deg) scaleX(0.5);
  transform: translateX(5px) translateY(3px) rotate(-45deg) scaleX(0.5);
}

.nav-trigger.nav-visible .nav-icon::before {
  -webkit-transform: translateX(5px) translateY(-3px) rotate(45deg) scaleX(0.5);
  -moz-transform: translateX(5px) translateY(-3px) rotate(45deg) scaleX(0.5);
  -ms-transform: translateX(5px) translateY(-3px) rotate(45deg) scaleX(0.5);
  -o-transform: translateX(5px) translateY(-3px) rotate(45deg) scaleX(0.5);
  transform: translateX(5px) translateY(-3px) rotate(45deg) scaleX(0.5);
}
@media only screen and (min-width: 1024px) {

.nav-trigger.nav-visible .nav-icon {
  -webkit-transform: translateY(-50%) translateX(-50%) rotate(-90deg);
  -moz-transform: translateY(-50%) translateX(-50%) rotate(-90deg);
  -ms-transform: translateY(-50%) translateX(-50%) rotate(-90deg);
  -o-transform: translateY(-50%) translateX(-50%) rotate(-90deg);
  transform: translateY(-50%) translateX(-50%) rotate(-90deg);
}

.nav-trigger.nav-visible .nav-icon::after {
  -webkit-transform: translateX(-5px) translateY(3px) rotate(45deg) scaleX(0.5);
  -moz-transform: translateX(-5px) translateY(3px) rotate(45deg) scaleX(0.5);
  -ms-transform: translateX(-5px) translateY(3px) rotate(45deg) scaleX(0.5);
  -o-transform: translateX(-5px) translateY(3px) rotate(45deg) scaleX(0.5);
  transform: translateX(-5px) translateY(3px) rotate(45deg) scaleX(0.5);
}

.nav-trigger.nav-visible .nav-icon::before {
  -webkit-transform: translateX(-5px) translateY(-3px) rotate(-45deg) scaleX(0.5);
  -moz-transform: translateX(-5px) translateY(-3px) rotate(-45deg) scaleX(0.5);
  -ms-transform: translateX(-5px) translateY(-3px) rotate(-45deg) scaleX(0.5);
  -o-transform: translateX(-5px) translateY(-3px) rotate(-45deg) scaleX(0.5);
  transform: translateX(-5px) translateY(-3px) rotate(-45deg) scaleX(0.5);
}
}

.d-blue { background-color: #00a0e6; }

.red { background-color: #f2b635; }

.blue { background-color: #f19a2a; }

.green { background-color: #00caff; }

.yellow { background-color: #f25648; }

.d-blue button:hover { color: #00a0e6; }

.red button:hover { color: #f2b635; }

.blue button:hover { color: #f19a2a; }

.green button:hover { color: #00caff; }

.yellow button:hover { color: #f25648; }