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

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

header {
    background-color: #4db8f7;
    color: white;
    padding: 1rem;
    text-align: center;
}

header nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}

header nav ul li {
    display: inline;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

.content {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    flex-grow: 1;
}

main {
    flex: 3;
    background-color: #f4f4f4;
    padding: 20px;
    margin-right: 20px;
}

aside {
    flex: 1;
    background-color: #e9ecef;
    padding: 20px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
}