* {
    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: #f5f5f5;
}

/* Navbar Styles */
nav {
    background-color: #1a3a52;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 15px 20px;
    transition: background-color 0.3s ease;
    font-weight: 500;
}

nav ul li a:hover {
    background-color: #0d1f2d;
}

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

/* Header Styles */
h1 {
    color: #1a3a52;
    margin-bottom: 10px;
    font-size: 2.5rem;
    border-bottom: 3px solid #0066cc;
    padding-bottom: 10px;
}

h2 {
    color: #1a3a52;
    margin-top: 20px;
    margin-bottom: 15px;
    font-size: 1.8rem;
}

h3 {
    color: #0066cc;
    margin-top: 15px;
    margin-bottom: 10px;
}

/* Paragraph Styles */
p {
    margin-bottom: 15px;
    text-align: justify;
    color: #555;
}

/* Link Styles */
a {
    color: #0066cc;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #004999;
    text-decoration: underline;
}

/* List Styles */
ul, ol {
    margin-left: 30px;
    margin-bottom: 15px;
}

ul li, ol li {
    margin-bottom: 10px;
    color: #555;
}

/* Card/Content Box */
.content-box {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

/* Preformatted text */
pre {
    background-color: #f0f0f0;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    border-left: 4px solid #0066cc;
    margin: 15px 0;
}

/* Footer Styles */
footer {
    background-color: #1a3a52;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: 50px;
}

footer p {
    color: white;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    .container {
        padding: 15px;
    }

    nav ul {
        flex-direction: column;
    }

    nav ul li a {
        padding: 12px 15px;
    }
}