html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: sans-serif;
  /*color: #004d00;*/
  /*background-color: #999900;*/
  color: #6a3d0d;
  background-color: #ffffdc;
}
/* Globale Links */
a {
  color: #004d00;
  text-decoration: none;
}
a:hover {
  color: #007700;
  text-decoration: underline;
}

/* Bereichsspezifische Links */
#main a {
  color: #0066cc;
}
#news a {
  color: #cc0000;
}
#footer a {
  color: #666666;
}

.grid-container {
  display: grid;
  grid-template-rows: 40px 1fr 40px;
  grid-template-columns: 15% 1fr 12%;
  grid-template-areas:
    "header header header"
    "menu main news"
    "footer footer footer";
  height: 100vh;
}

iframe {
  width: 100%;
  height: 100%;
  border: 0px solid #004d00;
}

#header { grid-area: header; }
#menu   { grid-area: menu; }
#main   { grid-area: main; }
#news   { grid-area: news; }
#footer { grid-area: footer; }

/* Menü */
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

nav li { position: relative; }

nav a {
  display: block;
  padding: 10px;
  text-decoration: none;
  color: #004d00;
}

nav a:hover {
  background: #7fbf7f;
  color: #fff;
}

nav ul ul {
  display: none;
  position: absolute;
  top: 0;
  left: 100%;
  background: #a8d5a2;
  min-width: 150px;
  border: 0px solid #6a3d0d;
}

nav li:hover > ul { display: block; }