*, *:before, *:after { box-sizing: border-box; }
html { font-size: 62.5%; }

body {
  font-family: 'Open Sans', sans-serif;
  font-size: 1.1rem;
  line-height: 1.5;
  color: #111;
  font-weight: 300;
  letter-spacing: 0.1em;
}

img { 
  max-width: 100%; 
}

.container {
  width: 80%;
  max-width: 960px;
  margin: 5rem auto;
  box-shadow: 0 0 1px black;
  //overflow: hidden;
}

.grid_4 {
  background: white;
  width: 23%;
  float: left;
  margin-right: 2.66%;
  border: solid 1px rgba(black, 0.15);
  position: relative;
  cursor: pointer;

  &:last-child {
    margin-right: 0;
  }
  
  p {
    margin: 0;
    padding: 1rem 1.5rem;
  }
  
  &:before {
    background: white;
    content: '';
    position: absolute;
    width: 98%;
    height: 100%;
    display: block;
    border: solid 1px rgba(black, 0.15);
    left: 1%;
    top: 3px;
    z-index: -10;
  }
  
   &:after {
    content: '';
    position: absolute;
    width: 96%;
    height: 100%;
    display: block;
    border: solid 1px rgba(black, 0.15);
    left: 2%;
    top: 5px;
    z-index: -10;
  }
  
  &:hover img { opacity: 0.8; }
  
}