img {
  max-width: 100%;   
  height: auto;      
  display: block; }
  
  * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.banner {
  width: 100%;
  display: block;
}

body {
  margin-top: 0;
}

// <weight>: Use a value from 100 to 700
// <uniquifier>: Use a unique and descriptive class name

.roboto-mono-<uniquifier> {
  font-family: "Roboto Mono", monospace;
  font-optical-sizing: auto;
  font-weight: <weight>;
  font-style: normal;
}

div.gallery {
  border: 1px solid #ccc;
}

div.gallery:hover {
  border: 1px solid #777;
}

div.gallery img {
  width: 100%;
  height: auto;
}

div.desc {
  padding: 15px;
  text-align: center;
}

* {
  box-sizing: border-box;
}

.responsive {
  padding: 0 6px;
  float: left;
  width: 24.99999%;
}

@media only screen and (max-width: 700px) {
  .responsive {
    width: 49.99999%;
    margin: 6px 0;
  }
}

@media only screen and (max-width: 500px) {
  .responsive {
    width: 100%;
  }
}

.clearfix:after {
  content: "";
  display: table;
  clear: both;
}