:root {
    --primary-color: #003366; /* Deep blue, refined from #000099 */
    --accent-color: #D77A08; /* Existing orange */
    --text-color: #333;
    --bg-color: #fcfcfc;
    --link-color: #0066cc;
    --link-hover-color: #004499;
    --nav-bg: #f8f9fa;
    --border-color: #e0e0e0;
}

* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

/* Layout */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 0 20px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

header h1 {
    color: var(--accent-color);
    margin: 0;
    font-size: 2.5rem;
}

header img.profile-photo {
    float: right;
    max-width: 150px;
    height: auto;
    border-radius: 8px;
    margin-left: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Clearfix for the floated image */
header::after {
    content: "";
    display: table;
    clear: both;
}

/* Navigation */
nav {
    background-color: var(--nav-bg);
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

nav li {
    margin: 0;
}

nav a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

nav a:hover {
    background-color: #e9ecef;
    color: var(--link-hover-color);
}

/* Main Content */
main {
    padding: 20px 0;
}

h2, h3 {
    color: var(--primary-color);
    margin-top: 1.5em;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
}

/* Scientific Presentation Specifics */
.research-item {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.research-item:last-child {
    border-bottom: none;
}

.research-content {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.research-text {
    flex: 2;
    min-width: 300px;
}

.research-citation {
    flex: 1;
    min-width: 250px;
    font-size: 0.9rem;
    background: #f8f9fa;
    padding: 15px;
    border-radius: 4px;
}

.image-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    margin: 20px 0;
}

.image-gallery figure {
    margin: 0;
    text-align: center;
}

.image-gallery img {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    padding: 4px;
    background: #fff;
}

.image-gallery figcaption {
    font-size: 0.85rem;
    color: #666;
    margin-top: 5px;
}

/* Contact Page */
.contact-section {
    margin-bottom: 30px;
}

pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 4px;
    overflow-x: auto;
    font-family: "Courier New", Courier, monospace;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: #666;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    header img.profile-photo {
        float: none;
        display: block;
        margin: 0 auto 20px;
    }
    
    header {
        text-align: center;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .research-content {
        flex-direction: column;
    }
}