style.css

*{
      box-sizing: border-box;
}
html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  width:100%;
  height:100%;
}

@-webkit-keyframes colorPulse{
  0% {background-color:#45CEEF;}
  25% {background-color:#FFF5A5;}
  50% {background-color:#FFD4DA;}
  75% {background-color:#99D2E4;}
  100% {background-color:#D8CAB4;}
}


input,
input::-webkit-input-placeholder {
    color: #000000;
    font-size: 20px;
    line-height: 2;
}

header{
  background: #FFFFFF;
  box-shadow: inset 0px -4px 15px -2px #000000;
  padding: 0 50px;
  font-size: 30px;
  text-transform: uppercase;
  width:100%;
  height:75px;
  line-height: 75px;
  position: relative;
  z-index:100;
}

#container{
  width:100%;
  height:calc(100vh - 75px);
}

#left{
  float:left;
  width: 50%;
  background: orange;
  min-height:100%;
  -webkit-animation: colorPulse 40s infinite alternate;
}

#right{
  float:right;
  width:50%;
  min-height:100%;
  background: url("img/pug.jpg") no-repeat center left;
  background-size: cover;
}

.inner{
  margin:0 auto;
  width: 80%;
}
#getstarted{
  padding-top:50%;
}
#getstarted button{
  border: 2px solid rgba(255,255,255,0.2); 
  padding: 20px;
  border-radius: 15px;
  background: rgba(255,255,255,0.45);
  font-weight: bold;
  font-size:16px;
  margin: 0 auto;
  display:block;

}
#getstarted button:hover{
  background: rgba(255,255,255,0.55);
  cursor: pointer;
}

#messages{
  display:none;
  margin-top:50px;
}

#messagesDiv{
  border: 2px solid rgba(255,255,255,0.2); 
    -webkit-box-shadow: 
      inset 0 0 8px  rgba(0,0,0,0.1),
            0 0 16px rgba(0,0,0,0.1); 
    -moz-box-shadow: 
      inset 0 0 8px  rgba(0,0,0,0.1),
            0 0 16px rgba(0,0,0,0.1); 
    box-shadow: 
      inset 0 0 8px  rgba(0,0,0,0.1),
            0 0 16px rgba(0,0,0,0.1); 
    padding: 15px;
    background: rgba(255,255,255,0.5);
}

#messagesDiv > div{
  margin-bottom:15px;
  font-size:1.5em;
}

#messages h3{
  border-bottom: 1px solid #222222;
  margin: 30px 0 10px;
}

#messages h3 span {
  font-size:80%;
  font-style:italic;
  color:#555555;
}

input[type=text]{
    border: 0; 
    -webkit-box-shadow: 
      inset 0 0 8px  rgba(0,0,0,0.1),
            0 0 16px rgba(0,0,0,0.1); 
    -moz-box-shadow: 
      inset 0 0 8px  rgba(0,0,0,0.1),
            0 0 16px rgba(0,0,0,0.1); 
    box-shadow: 
      inset 0 0 8px  rgba(0,0,0,0.1),
            0 0 16px rgba(0,0,0,0.1); 
    padding: 15px;
    background: rgba(0,0,0,0.1);
    margin: 0 0 10px 0;
    width:100%;
    height:70px;
}