@import url("https://fonts.googleapis.com/css?family=Space+Mono");
body {
  font: sans-serif;
}

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

.handle {
  position: absolute;
  width: 250px;
  border-radius: 15px;
  left: 15px;
  top: 15px;
  bottom: 15px;
  padding: 15px;
  background: radial-gradient(center, circle, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0) 20%, rgba(255, 255, 255, 0) 21%), radial-gradient(center, circle, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0) 20%, rgba(0, 0, 0, 0) 21%), radial-gradient(center, circle farthest-corner, grey, #a6a6a6);
  background-size: 10px 10px, 10px 10px, 100% 100%;
  background-position: 1px 1px, 0px 0px, center center;
}

.display {
  background: lime;
  background-image: repeating-linear-gradient(0deg, #00e600 0px, #00e600 2px, transparent 2px, transparent 10px), repeating-linear-gradient(90deg, #00e600, #00e600 2px, transparent 2px, transparent 9px);
  border: 11px solid #333;
  border-radius: 8px;
  width: 100%;
  padding: 7px 17px;
  font-family: Space Mono, monospace;
  height: 80px;
  overflow-y: hidden;
  color: #000;
  line-height: 1.45;
  box-shadow: inset 0px 0px 0px 2px black, 0px 0px 0px 2px black;
  margin-bottom: 10px;
}

.buttons {
  display: flex;
  width: 100%;
  height: 370px;
  justify-content: space-around;
  flex-wrap: wrap-reverse;
}

.btn-container {
  flex-basis: 50%;
  position: relative;
}
.btn-container.bottom {
  flex-basis: 100%;
}

button.btn-floor {
  position: relative;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  border: 2px solid lightgray;
  box-shadow: inset 0px 0px 2px 1px gray, inset 0px -3px 4px rgba(0, 0, 0, 0.3), inset 0px 3px 4px rgba(255, 255, 255, 0.6), 0px -2px 3px rgba(0, 0, 0, 0.6), 0px 1px 2px rgba(255, 255, 255, 0.7), 0px 0px 1px 1px black, 0px 0px 0px 5px gray, 0px 0px 1px 6px black;
  display: block;
  cursor: pointer;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: 23px;
  color: #3c3c3c;
  outline: none;
}
button.btn-floor:hover {
  border-color: lime;
}
button.btn-floor:active, button.btn-floor.active {
  background: lime;
  color: #ccffcc;
  border-color: green;
}

.building {
  width: 300px;
  position: absolute;
  background: #ccc26b;
  background-image: linear-gradient(rgba(204, 194, 107, 0.6), rgba(204, 194, 107, 0.6)), url("http://gdj.graphicdesignjunction.com/wp-content/uploads/2011/05/photoshop-texture-35.jpg");
  background-size: cover, cover;
  height: 460px;
  left: 300px;
  top: 50px;
}
.building:before {
  position: absolute;
  display: block;
  content: "";
  background: inherit;
  top: -30px;
  left: 85px;
  width: 130px;
  height: 30px;
}
.building:after {
  position: absolute;
  display: block;
  content: "";
  background: #333;
  bottom: -20px;
  left: -15px;
  width: 330px;
  height: 20px;
}

.floors {
  display: flex;
  height: 100%;
  width: 100%;
  justify-content: stretch;
  flex-direction: column-reverse;
}
.floors .floor {
  position: relative;
  height: 100%;
}
.floors .floor:after {
  content: "";
  display: block;
  width: 100%;
  position: absolute;
  top: 0;
  border-top: 10px solid turquoise;
  opacity: 0.8;
}
.floors .floor .floor-door {
  background: silver;
  background-image: repeating-linear-gradient(90deg, transparent 0px, transparent 33px, #333 33px, #333 37px, transparent 37px, transparent 70px);
  width: 80px;
  height: 55px;
  border: 5px solid #333;
  border-bottom: none;
  position: absolute;
  bottom: 0;
  left: 5px;
}
.floors .floor .floor-window {
  position: absolute;
  width: 100%;
  left: 0;
  top: 0;
  bottom: 0;
  right: 0;
  height: 100%;
}
.floors .floor .floor-window:after, .floors .floor .floor-window:before {
  content: "";
  position: absolute;
  display: block;
  background: goldenrod;
  border: 2px solid darkgoldenrod;
  width: 40px;
  height: 40px;
  top: 20px;
  margin-left: -20px;
}
.floors .floor .floor-window:after {
  left: 80%;
}
.floors .floor .floor-window:before {
  left: 20%;
}

.elevator-container {
  position: absolute;
  background: turquoise;
  width: 100px;
  left: 100px;
  height: 100%;
  z-index: 10;
}
.elevator-container .elevator {
  width: 40px;
  height: 60px;
  margin-left: -20px;
  margin-top: 7px;
  left: 50%;
  background: white;
  border: 3px solid #333;
  border-top-width: 10px;
  position: absolute;
}
.elevator-container .elevator-door {
  width: 100%;
  height: 100%;
  right: 0;
  position: relative;
  background: silver;
  background: radial-gradient(center, circle, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0) 20%, rgba(255, 255, 255, 0) 21%), radial-gradient(center, circle, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0) 20%, rgba(0, 0, 0, 0) 21%), radial-gradient(center, circle farthest-corner, grey, #8a8a8a);
  background-size: 7px 7px, 7px 7px, 100% 100%;
  background-position: 1px 1px, 0px 0px, center center;
}
.elevator-container .elevator-light {
  position: absolute;
  top: -8px;
  left: 50%;
  border-radius: 50%;
  border: 1px solid black;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  background: lime;
}