@import url(https://fonts.googleapis.com/css?family=Roboto:400,100,300,500,700,900);
body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
}
h1 { margin: 0; }
a { 
  color: #333;
  text-decoration: none;
}

div#logo-container {
  width: 100px;
}

div#logo-container img {
  width: 100%;
  display: block;
  margin: 0 auto;
}

header, nav {
  display: -webkit-flex;
  display: flex;
}

header {
  background-color: #CCC;
  padding: 20px;
  justify-content: space-between;
  flex: 1;
}

nav {
  justify-content: flex-end;
  align-self: center;
}

nav a {
  width: 100px;
  text-align: center;
}
nav a:hover {
  color: #FF0000;
}
section#works {
  margin: 0;
  padding: 0;
  font-size: 0;
}
div.work {
  display: inline-block;
  width: 33.3333%;
  height: 400px;
  background-color: #666;
  margin: 0;
}

div.work:nth-child(even) {
  background-color: #333;
}

#flex-works {
  display: -webkit-flex;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}

.flex-work {
  position: relative;
  flex-basis: 33.33333%;
  height: 200px;
  background-color: #FF0;
  padding: 0;
}

.flex-work h1 {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  margin-right: -50%;
  padding: 0;
}

@media screen and (max-width: 768px)
{
  header {
    flex-direction: column;
  }
  div#logo-container {
    width: 100%;
  }
  div#logo-container img {
    width: 100px;
    margin-bottom: 20px;
  }
}

@media screen and (max-width: 480px) {
  header, nav {
    flex-direction: column;
  }
  div.work {
    width: 50%;
  }
  
  div.flex-work {
    flex-basis: 50%;
  }
}