html,
body {
  height: 100%;
  
}

body {
  display: flex;
  flex-direction: column;
  background:#00b4ff;
  margin: 0;
}
#background-wrap {
  bottom: 0;
  left: 0;
  padding-top: 50px;
  position: fixed;
  right: 0;
  top: 0;
  z-index: -1;
}

/* KEYFRAMES */

@-webkit-keyframes animateCloud {
  0% {
    margin-left: -1000px;
  }
  100% {
    margin-left: 100%;
  }
}

@-moz-keyframes animateCloud {
  0% {
    margin-left: -1000px;
  }
  100% {
    margin-left: 100%;
  }
}

@keyframes animateCloud {
  0% {
    margin-left: -1000px;
  }
  100% {
    margin-left: 100%;
  }
}

/* ANIMATIONS */

.x1 {
  -webkit-animation: animateCloud 35s linear infinite;
  -moz-animation: animateCloud 35s linear infinite;
  animation: animateCloud 35s linear infinite;

  -webkit-transform: scale(0.65);
  -moz-transform: scale(0.65);
  transform: scale(0.65);
}

.x2 {
  -webkit-animation: animateCloud 20s linear infinite;
  -moz-animation: animateCloud 20s linear infinite;
  animation: animateCloud 20s linear infinite;

  -webkit-transform: scale(0.3);
  -moz-transform: scale(0.3);
  transform: scale(0.3);
}

.x3 {
  -webkit-animation: animateCloud 30s linear infinite;
  -moz-animation: animateCloud 30s linear infinite;
  animation: animateCloud 30s linear infinite;

  -webkit-transform: scale(0.5);
  -moz-transform: scale(0.5);
  transform: scale(0.5);
}

.x4 {
  -webkit-animation: animateCloud 18s linear infinite;
  -moz-animation: animateCloud 18s linear infinite;
  animation: animateCloud 18s linear infinite;

  -webkit-transform: scale(0.4);
  -moz-transform: scale(0.4);
  transform: scale(0.4);
}

.x5 {
  -webkit-animation: animateCloud 25s linear infinite;
  -moz-animation: animateCloud 25s linear infinite;
  animation: animateCloud 25s linear infinite;

  -webkit-transform: scale(0.55);
  -moz-transform: scale(0.55);
  transform: scale(0.55);
}

/* OBJECTS */

.cloud {
  background: #fff;
  background: -moz-linear-gradient(top, #fff 5%, #f1f1f1 100%);
  background: -webkit-gradient(
    linear,
    left top,
    left bottom,
    color-stop(5%, #fff),
    color-stop(100%, #f1f1f1)
  );
  background: -webkit-linear-gradient(top, #fff 5%, #f1f1f1 100%);
  background: -o-linear-gradient(top, #fff 5%, #f1f1f1 100%);
  background: -ms-linear-gradient(top, #fff 5%, #f1f1f1 100%);
  background: linear-gradient(top, #fff 5%, #f1f1f1 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#fff', endColorstr='#f1f1f1',GradientType=0 );

  -webkit-border-radius: 100px;
  -moz-border-radius: 100px;
  border-radius: 100px;

  -webkit-box-shadow: 0 8px 5px rgba(0, 0, 0, 0.1);
  -moz-box-shadow: 0 8px 5px rgba(0, 0, 0, 0.1);
  box-shadow: 0 8px 5px rgba(0, 0, 0, 0.1);

  height: 120px;
  position: relative;
  width: 350px;
}

.cloud:after,
.cloud:before {
  background: #fff;
  content: '';
  position: absolute;
  z-index: -1;
}

.cloud:after {
  -webkit-border-radius: 100px;
  -moz-border-radius: 100px;
  border-radius: 100px;

  height: 100px;
  left: 50px;
  top: -50px;
  width: 100px;
}

.cloud:before {
  -webkit-border-radius: 200px;
  -moz-border-radius: 200px;
  border-radius: 200px;

  width: 180px;
  height: 180px;
  right: 50px;
  top: -90px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background-color: #D33F49;
}

h1,
a,
button {
  color: white;
}

main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100%;
}

.green-background {
  padding: 150px;
  background-color: black;
}

.results {
  display: none;
  padding: 50px;
  background-color: black;
  font-weight: bold;
  font-size: large;
  color: white;
}

.input-label {
  margin-bottom: 40px;
}

input {
  padding: 5px 10px;
}

button {
  padding: 10px 10px 10px 10px;
  background-color: #1E3888;
  font-weight: bold;
  border: none;
  border-radius: 5px;
}

.red-background {
  background-color: red;
}

.red {
  color: red;
}