main.css

html {
  box-sizing:border-box;
  background-color: #ffc600;
  font-family: 'helvetica neue';
  font-size:20px;
  font-weight:200;
}

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

.container {
  max-width: 480px;
  margin:50px auto;
}

input.search {
  width:120%;
  left:-10%;
  position: relative;
  margin:0;
  top:10px;
  text-align:center;
  font-size:40px;
  border: 10px solid #F7F7F7;
  border-radius:5px;
  z-index:2;
}

.results {
  margin:0;
  padding:0;
}
.results li {
  background-color:white;
  list-style:none;
  margin:0;
  padding:20px;
  border-bottom: 1px solid #D8D8D8;
}
.results li:nth-child(even) {
  transform: perspective(100px) rotateX(2deg) translateY(2px) scale(1.001);
  background: linear-gradient(to bottom,  #ffffff 0%,#EFEFEF 100%);
}
.results li:nth-child(odd) {
  transform: perspective(100px) rotateX(-2deg) translateY(3px);
  background: linear-gradient(to top,  #ffffff 0%,#EFEFEF 100%);
}

span.rank {
  font-size: 18px;
  float:left;
  width:20%;
}
span.country {
  font-weight:500;
  text-transform: capitalize;
}
span.population {
  font-size: 20px;
  float:right;
}

.hl {
  background-color: #ffc600;
}