body {
    font-family: 'Roboto Mono', monospace;
    background-color: #e0e0e0;
    color: #333;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0.1) 1px, transparent 1px), linear-gradient(to bottom, rgba(0, 0, 0, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    padding: 2em 0;
    background-color: #ffffff;
    border-bottom: 2px solid #333333;
    position: relative;
}

header h1 {
    font-size: 2.5em;
    margin: 0;
    position: relative;
    z-index: 1;
    color: #333333;
}

header p {
    font-size: 1.2em;
    margin-top: 0.5em;
    color: #777777;
    position: relative;
    z-index: 1;
}

header::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 90%;
    height: 80%;
    border: 2px solid #333333;
    transform: translate(-50%, -50%);
    z-index: 0;
}

nav {
    background-color: #ffffff;
    padding: 1em 0;
    border-bottom: 2px solid #333333;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 0 1.5em;
}

nav ul li a {
    text-decoration: none;
    color: #333333;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #555555;
}

main {
    flex: 1;
    padding: 2em 0;
    background-color: #ffffff;
}

section {
    margin-bottom: 2em;
    padding: 1em;
    position: relative;
}

section h2 {
    border-bottom: 2px solid #333333;
    padding-bottom: 0.5em;
    margin-bottom: 1em;
    font-size: 1.8em;
    color: #333333;
}

section ul {
    list-style: none;
    padding: 0;
}

section ul li {
    margin-bottom: 1.5em;
}

section ul li h3 {
    margin: 0;
    font-size: 1.4em;
    color: #333333;
}

section ul li p {
    margin: 0.5em 0 0 0;
    color: #666666;
}

footer {
    text-align: center;
    padding: 1em 0;
    background-color: #ffffff;
    border-top: 2px solid #333333;
}

.email-button {
    display: inline-block;
    padding: 0.5em 1.5em;
    margin-top: 1em;
    background-color: #333333;
    color: #ffffff;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.email-button:hover {
    background-color: #555555;
}

@media (min-width: 768px) {
    header {
        padding: 3em 0;
    }

    main {
        padding: 3em 0;
    }

    section {
        padding: 2em;
    }
}