html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}
.wrapper {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 100px;
    background-color: #000000;
    color: #09ff00;
    padding: 20px;
}
.sidebar h2{
    font-size: 1.2em;
}
.sidebar ul {
    list-style: none;
    padding: 0;
}
.sidebar li {
    margin: 10px 0;
}
.sidebar a {
    color: #fff600;
    text-decoration: none;
}
.sidebar a:hover {
    text-decoration: underline;
}
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
}
main {
    flex: 1;
    padding: 20px;
}
body {
    font-family: 'Orbitron', Tahoma, sans-serif;
    color: #fff600;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    background-color: #222;
}
.content {
    flex: 1;
}

header {
background: linear-gradient(to right, #09ff00, #fff600);
  color: black;
  padding: 10px;
  border-bottom: 2px solid #000000;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.45);
}

nav {
    background-color: #000000;
    text-align: center;
    padding: 10px 0;
}

nav a {
    color: #fff600;
    margin: 0 15px;
    text-decoration: none;
}
nav a:hover {
    text-decoration: underline;
}

main {
    padding: 20px;
}

footer {
    background-color: #000000;
    text-align: center;
    padding: 10px;
    font-size: 0.8em;
    color: #fff600;
}