```css
body {
    font-family: Arial, sans-serif;
    background-color: #1a0f0f;
    color: #f8f1df;
    line-height: 1.6;
    padding: 16px;
}

header {
    background-color: #8b0000;
    padding: 20px;
    text-align: center;
    border-bottom: 5px solid #f4c542;
}

header img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    background-color: white;
    border: 2px solid #f4c542;
    border-radius: 8px;
}

header nav.navbar {
    background-color: #260909 !important;
}

.navbar .navbar-brand,
.navbar .nav-link {
    color: #f4c542 !important;
    font-weight: bold;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: white !important;
}

.navbar .navbar-toggler {
    border-color: #f4c542;
}

main {
    background-color: #2b1717;
    padding: 25px;
    margin: 20px auto;
    max-width: 900px;
    border: 1px solid #8b0000;
    border-radius: 8px;
}

h1, h2, h3 {
    color: #f4c542;
}

.bio {
    color: #f8f1df;
}

main a {
    color: #f4c542;
}

main a:hover {
    color: white;
}

#site-footer {
    background-color: #8b0000;
    color: #f4c542;
    text-align: center;
    padding: 15px;
    margin-top: 20px;
    border-top: 3px solid #f4c542;
    font-size: 14px;
    font-style: italic;
}

#site-footer p {
    margin-bottom: 0;
}

.form-label {
    color: #f8f1df;
}

.form-control {
    background-color: #f8f1df;
    color: #1a0f0f;
    border-color: #8b0000;
}

.form-control:focus {
    border-color: #f4c542;
    box-shadow: 0 0 0 0.2rem rgba(244, 197, 66, 0.25);
}

.btn-danger {
    background-color: #8b0000;
    color: #f4c542;
    border-color: #f4c542;
}

.btn-danger:hover {
    background-color: #5c0000;
    color: white;
    border-color: #f4c542;
}

@media (max-width: 767.98px) {
    body {
        padding: 8px;
    }

    header {
        padding: 15px 10px;
    }

    main {
        padding: 18px;
    }
}
```