* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background: #2e58af;
    color: white;
    text-align: center;
    padding: 15px;
}

nav {
    background: #2e58af;
    color: white;
    padding: 10px;
    text-align: center;
}

nav a {
    color: white;
    margin: 15px;
    text-decoration: none;
}

.container {
    display: flex;
    flex: 1;
}

aside {
    background: #ddd;
    width: 20%;
    padding: 20px;
}

main {
    flex: 1;
    padding: 20px;
}

footer {
    background: #2e58af;
    color: white;
    text-align: center;
    padding: 10px;
}