body {
    font-family: sans-serif;
    margin: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #fff;
    padding: 10px 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.lang-select img {
    width: 20px;
    margin-right: 10px;
}

.auth-buttons .btn {
    text-decoration: none;
    color: #333;
    padding: 8px 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-left: 10px;
}

.auth-buttons .btn:hover {
    background-color: #eee;
}

nav ul {
    list-style: none;
    padding: 10px 0 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 20px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    font-size: 18px;
}

nav ul li a:hover {
    color: #007bff;
}

main {
    padding: 20px;
}

.content {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
}