body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #212529;
    color: #e9ecef;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid #495057;
    margin-bottom: 30px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.language-selector {
    display: flex;
    align-items: center;
}

.language-btn {
    cursor: pointer;
    margin-left: 10px;
    opacity: 0.6;
    transition: opacity 0.3s;
    width: 32px;
    height: 32px;
    border: 2px solid transparent;
    border-radius: 4px;
}

.language-btn:hover {
    opacity: 1;
}

.language-btn.active {
    opacity: 1;
    border-color: #6c757d;
}

#content {
    background-color: #2a2e33;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

h1 {
    color: #f8f9fa;
    font-size: 32px;
    text-align: center;
    margin-bottom: 30px;
}

h3 {
    color: #8ecdf7; /* Changed h3 color to a light blue to distinguish from content */
    border-bottom: 1px solid #495057;
    padding-bottom: 8px;
    margin-top: 30px;
    font-size: 20px;
}

p {
    margin-bottom: 20px;
    color: #dee2e6;
}

ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #495057;
    color: #6c757d;
    font-size: 14px;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    #content {
        padding: 20px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .language-selector {
        margin-top: 15px;
    }
}