/* Basic styles */
body {
    margin: 0;
    font-family: Arial, sans-serif;
}

header {
    background-color: #2196F3;
    color: white;
    text-align: center;
    padding: 1rem;
}

.container {
    display: flex;
    height: 100vh;
}

aside {
    width: 20%;
    background-color: #f5f5f5;
    padding: 1rem;
    border-right: 1px solid #ddd;
}

main {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
}