/* Global layout */
body {
  margin: 0;
  padding: 0;
  text-align: center;       /* center inline content */
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
}

/* Center the main content block */
.page-container {
  max-width: 1100px;
  width: 100%;
  margin-left: auto;           /* center block */
  margin-right: auto;
  text-align: center;
}

main {
    max-width: 1100px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    box-sizing: border-box;
}

/* Existing rules from html files */

header > div:first-child{
    max-width: 2200px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
    box-sizing: border-box;
    background-color: #004080;
    color: white;
}
header .logo-placeholder {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 60px;
    height: 60px;
    background-color: rgba(255,255,255,0.3);
    border: 2px dashed white;
    border-radius: 8px;
    text-align: center;
    line-height: 60px;
    font-size: 12px;
}
nav {
    background-color: #003366;
    overflow: hidden;
}
nav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}
nav a:hover {
    background-color: #ddd;
    color: black;
}
footer {
    background-color: #004080;
    color: white;
    text-align: center;
    padding: 10px;
    position: relative;
    bottom: 0;
    width: 100%;
}
img.example {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
}