styles.css

body {
  background: linear-gradient(217deg, rgba(255,0,0,.8), rgba(255,0,0,0) 70.71%),
              linear-gradient(127deg, rgba(0,255,0,.8), rgba(0,255,0,0) 70.71%),
              linear-gradient(336deg, rgba(0,0,255,.8), rgba(0,0,255,0) 70.71%);
;
  height: 100vh;
  overflow: hidden;
}

.box {
  height: 150px;
  width: 150px;
  background: linear-gradient(30deg, #2c3e50, #34495e);
  border-radius: 12px;
  box-shadow: 0px 10px 40px rgba(255, 255, 200,.3);
  text-align: center;
  vertical-align: middle;
  line-height: 150px;
  font-size: 24px;
}

.animatebox {
  height: 100vh;
  width: 100%;
  color: white;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.picker {
  background-color: white;
  height: 32.5px;
  border: solid 1px black;
  color: black;
}

.subButton {
  background-color: white;
  border: solid 1px black;;
  border-radius: 4px;
  margin: 5px;
  padding: 5px;
  color: black;
}

h1 {
  font-size: 450%;
  color: white;
}

a .btn {
  position: absolute;
  bottom: 10%;
  left: 50%;
  right: 50%;
}

.footer {
  position: absolute;
  left: 0;
  bottom: 10px;
  color: white;
  text-align: center;
  width: 100%;
}