html {
  background: #003856;
}
body {
  background: #003856;
  width: 100%;
  margin: 0 auto;
  padding: 0;
  height: 100%;
  font-size: 110%;
}

.wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
header {
  background-color: #0066cc;
  color: #fff;
  padding: 15px 20px;
  text-align: center;
  font-size: 26px;
  font-weight: bold;
}

/* Hamburger */
.hamburger {
  display: none;
  font-size: 28px;
  cursor: pointer;
  padding: 10px 20px;
  background-color: #005bb5;
  color: #fff;
  text-align: right;
}

/* Navigation */
nav {
  display: flex;
  justify-content: left;
  flex-wrap: wrap;
  background-color: #007bff;
  gap: 15px;
  padding: 3px 0;
  width: 100%;
}

nav a {
  color: white !important;
  text-decoration: none;
  font-weight: bold;
  padding: 6px 15px;
  border-radius: 5px;
  transition: background 0.3s;
}

nav a:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

/* Main content scrollable */
main {
  padding: 20px;
  flex: 1;
  overflow-y: auto;
  background: #d6ebfc;
  max-height: calc(100vh - 200px);
}

/* Footer always at bottom */
footer {
  background-color: #0066cc;
  color: white;
  text-align: center;
  padding: 10px;
  font-size: 14px;
}

a { color:black; text-decoration: none; }
a:hover { color: red; }

 img.responsive-image {
    width: 50%;
  }
 #banner {
	background: #0066cc url('https://goe-brd.github.io/goe_banner.png');
	background-size: 70%;
	background-repeat: no-repeat;
	background-position: left center;
	padding: 10px;
	height: 100px;
 }

/* Responsive menu */
@media (max-width: 768px) {
  .hamburger {
    display: block;
    font-size: 14px;
    text-align:left;
  }

  nav {
    display: none;
    flex-direction: column;
    align-items: center;
  }

  .nav-open nav {
    display: flex;
  }
  img.responsive-image {
      width: 100%;
    }
 #banner {
	background: #0066cc url('https://goe-brd.github.io/goe_banner.png');
	background-size: 85%;
	background-repeat: no-repeat;
	background-position: left center;
	padding: 10px;
	height: 130px;
 }
}