/* Reset some default styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px 20px 20px;
}

header img {
    max-width: 100px;
    margin-bottom: 20px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2em;
    color: #555;
}

/* Navigation bar */
nav {
    text-align: center;
    margin: 30px 0;
}

nav a {
    display: inline-block;
    margin: 0 15px;
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 1em;
    transition: color 0.2s;
}

nav a:hover {
    color: #0078D7; /* subtle blue hover */
}

/* Main content */
main {
    max-width: 900px;
    margin: auto;
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.05);
}

main section {
    margin-bottom: 30px;
}

main h2 {
    margin-bottom: 15px;
    color: #0078D7;
}

main ul, main ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

main li {
    margin-bottom: 10px;
}

pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    color: #666;
    font-size: 0.9em;
    border-top: 1px solid #e0e0e0;
}

footer a {
    color: #0078D7;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    nav a {
        display: block;
        margin: 10px 0;
    }
    main {
        padding: 20px;
    }
}