:root {
  --bgcolor: #121212;
  --lightbgcolor:#20292d;
  --bordercolor:#333447;
  --fontcolor:#f0f0f0;
  --hovercolor:#a2daff;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family:'Courier New', Courier, monospace;
}

html, body {
  overflow-x:hidden;
  overflow-y:auto;
}

/* Title Bar */
#title {
  z-index: 200;
  position: fixed;
  width:100%;
  background-color: var(--bgcolor);
  color:var(--fontcolor);
  font-size:medium;
  padding-left: 100px;
  padding-top:10px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--bordercolor);
}
#title .tech-art {
  color:var(--hovercolor);
  font-weight:lighter;
}
#title .contact-pointer, #title .plus-art {
  color:red;
  font-weight: lighter;
}

/* Main Content Area */
#main-content {
  padding-top:100px;
  background-image: url("../images/wu-bg.png");
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

/* TILT EFFECT */
.page {
  height: 200%;
  background-color: var(--bgcolor);
}
.content {
  transform-origin: top left;
  transition: transform 0.7s cubic-bezier(1, 0.005, 0.24, 1);
  background-color: var(--lightbgcolor);
  border-left: 2px solid var(--bordercolor);
}

.side-buttons {
  z-index: 800;
  position: fixed;
  list-style-type: none;
  margin-top:100px;
  padding: 20px 20px 20px 0px;
  display:block;
  background-color: var(--bordercolor);
  border-top-right-radius: 100%;
  border-bottom-right-radius: 100%;
  border-bottom-right-radius: 100%;
  border-style: solid;
  border-width: 2px 2px 2px 0px;
  border-color: var(--bgcolor);
}

.side-button img {
  height: 60px;
  width: 60px;
  padding:12px;
  top:50%;
  left:50%;
}
.side-button img:hover {
  color: var(--hovercolor);
  mix-blend-mode:overlay;
}

.top-btn {
  color: var(--fontcolor);
  font-size: xx-large;
  padding: 10px 0px 100px 14px;
}
.top-btn:hover {
  color:var(--hovercolor);
}

.menu-toggle {
  z-index: 900;
  position: fixed;
  top: 0;
  left: 0;
  display: block;
  cursor: pointer;
  width: 100px;
  height: 80px;
  background-color:var(--bordercolor);
  border-bottom-right-radius: 100%;
  border-style: solid;
  border-width: 0px 2px 2px 0px;
  border-color: var(--bgcolor);
  color: var(--fontcolor);
}
.menu-toggle .menu-open, .menu-toggle .menu-close {
  position: absolute;
  top: 48%;
  left: 38%;
  margin-top: -15px;
  margin-left: -12px;
  transition: transform 0.7s cubic-bezier(1, 0.005, 0.24, 1);
}
.menu-toggle .menu-open:hover, .menu-toggle .menu-close:hover {
  color:var(--hovercolor)
}
.menu-toggle .menu-open {
  transform-origin: -100px -100px;
}
.menu-toggle .menu-close {
  transform: rotate(20deg);
  transform-origin: -100px -160px;
}
.menu-items {
  position: fixed;
  bottom: 0;
  left: 50px;
  list-style-type: none;
  margin: 0;
  padding: 0;
}
.menu-items li {
  height: 60px;
  margin-bottom: 40px;
  transform: translateX(-340px);
  transition: transform 0.7s 0s cubic-bezier(1, 0.005, 0.24, 1);
}
.menu-items li:nth-child(2) {
  margin-left: 40px;
}
.menu-items li:nth-child(3) {
  margin-left: 80px;
}
.menu-items li:nth-child(4) {
  margin-left: 120px;
}
.menu-items li:nth-child(5) {
  margin-left: 160px;
}
.menu-items a {
  display: block;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--fontcolor);
  transition: color 0.2s;
}
.menu-items a .icon {
  position: relative;
  display: inline-block;
  margin-right: 25px;
  color: var(--fontcolor);
}
.menu-items a .icon:after {
  position: absolute;
  top: 50%;
  left: 50%;
  content: '';
  display: block;
  width: 60px;
  height: 60px;
  margin-left: -33px;
  margin-top: -32px;
  border-radius: 100%;
  border: 2px solid var(--fontcolor);
  transition: border-color 0.2s;
}
.menu-items a:hover {
  color: var(--hovercolor);
}
.menu-items a:hover .icon:after {
  border-color: var(--hovercolor);
}
.menu-items a:active .icon {
  color: var(--hovercolor);
}

.tilt .content {
  transform: rotate(-30deg);
}
.tilt .menu-open {
  transform: rotate(-20deg);
}
.tilt .menu-close {
  transform: rotate(0);
}
.tilt .menu-items li {
  transform: translateX(0);
  transition: transform 0.35s 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.tilt .menu-items li:nth-child(2) {
  transition-delay: 0.47s;
}
.tilt .menu-items li:nth-child(3) {
  transition-delay: 0.48s;
}
.tilt .menu-items li:nth-child(4) {
  transition-delay: 0.49s;
}
.tilt .menu-items li:nth-child(5) {
  transition-delay: 0.50s;
}


/* RESPONSIVE IMAGE GRID */
.row {
  display: flex;
  flex-wrap: wrap;
  padding-top: 20px;
}

.root-row {
  padding-left: 100px;
}

#animations-line {
  background: linear-gradient(rgba(33, 33, 33, 0.75), rgba(68, 68, 68, 0.85));
  border-bottom: 2px solid var(--bgcolor);
  border-top: 2px solid var(--bgcolor);
}
#animations-line .column {
  flex: 20%;
  max-width: 20%;
}
#animations-line img {
  filter:none;
}

/* Create four equal columns that sits next to each other */
.column {
  flex: 50%;
  max-width: 50%;
  padding-right: 8px;
}

.column img {
  vertical-align: middle;
  width: 100%;
  padding: 4px;
  filter:grayscale(80%);
}
.column img:hover {
  filter:none;
}

.card {
  position: relative;
  text-align: center;
  color: var(--fontcolor);
  padding: 20px;
}
.card-info {
  position: absolute;
  text-align: center;
  width: 100%;
  bottom:20px;
  left:0px;
  background-color: var(--lightbgcolor);
  opacity: 0.8;
}
.card-text-only {
  display: block;
  background-color: var(--bgcolor);
  margin-top: auto;
  margin-bottom: auto;
  padding: 20px;
  filter:drop-shadow(5px 5px 5px black);
}
.card-text-only:hover {
  filter:drop-shadow(2px 2px 2px var(--fontcolor));
}

.flip-img {
  transform: scaleX(-1);
}

@media screen and (orientation:portrait) {
  .column {
    flex: 100%;
    max-width: 100%;
  }
}

@media screen and (max-width: 640px) {
  #title {
    font-size: smaller;
  }
}