/* General Reset and Variables */
:root {
    --primary-color: #000040;
    --secondary-color: #8080FF;
    --text-color: #000000;
    --background-color: #ffffff;
    --border-color: #ddd;
    --font-family: 'Verdana', Arial, Helvetica, sans-serif;
    --border-radius: 5px;
    --transition-duration: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Layout Container */
.container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 1.25rem;
    padding: 1.25rem;
    min-height: calc(100vh - 100px);
}

@media (max-width: 668px) {
    .container {
        grid-template-columns: 1fr;
        display: flex;
        flex-direction: column;
    }
}

/* Sidebar */
.sidebar {
    background-color: var(--primary-color);
    color: var(--background-color);
    padding: 1rem;
}

.sidebar h2 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav a {
    color: var(--background-color);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-duration), color var(--transition-duration);
}

.nav a:hover, .nav a:focus {
    background-color: var(--background-color);
    color: var(--primary-color);
}

/* Main Content */
.content {
    padding: 1rem;
}

.content h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.content p {
    margin-bottom: 1rem;
}

/* General Image Styling */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Gallery-Specific Styling */
.image-gallery img {
    max-width: 90%;
    height: auto;
    margin: 0 auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: transform var(--transition-duration), box-shadow var(--transition-duration);
}

.image-gallery img:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Contact Details Section */
.contact-details {
    margin-top: 1.25rem;
    line-height: 1.8;
}

.contact-details h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-top: 15px;
}

/* Floating Feature Image */
.feature-image {
    float: left;
    margin: 0 15px 15px 0;
    width: 300px;
    height: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

/* Specifications Table */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 1em;
    text-align: left;
}

.specs-table thead {
    background-color: var(--primary-color);
    color: var(--background-color);
}

.specs-table th, .specs-table td {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
}

.specs-table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

.specs-table tbody tr:hover {
    background-color: #f1f1f1;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--background-color);
    text-align: center;
    padding: 1rem 0;
    margin-top: auto;
}

footer .footer-nav {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

footer .footer-nav a {
    color: var(--background-color);
    text-decoration: none;
    transition: color var(--transition-duration);
}

footer .footer-nav a:hover {
    color: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 668px) {
    .sidebar {
        order: 1;
    }

    .content {
        order: 2;
    }

    .image-gallery img {
        max-width: 100%;
    }
}