:root {
    --primary-color: #a588ae; /* Lavender */
    --link-hover: #8e7396;
    --text-color: #444;       /* Professional Grey */
    --light-text: #666;
    --heading-color: #222;
    --bg-color: #ffffff;
    --sidebar-bg: #fdfdfd;
    --border-color: #eee;
    --container-width: 900px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #c7b1ce; /* Lighter lavender for dark mode */
        --link-hover: #d9c8de;
        --text-color: #ccc;
        --light-text: #999;
        --heading-color: #eee;
        --bg-color: #121212;
        --sidebar-bg: #1a1a1a;
        --border-color: #333;
    }
}

body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.site-layout {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
    padding-top: 4rem;
}

/* Sidebar Styling - Peter Innes Style */
.sidebar {
    width: 220px;
    position: sticky;
    top: 4rem;
    flex-shrink: 0;
}

.sidebar h1 {
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    margin-bottom: 1.5rem;
    color: var(--heading-color);
    font-weight: 400;
}

.profile-image {
    width: 100%;
    max-width: 180px;
    height: auto;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    display: block;
    border: 1px solid var(--border-color);
}

.profile-info {
    margin-bottom: 2rem;
}

.profile-info p {
    margin: 0.4rem 0;
    font-size: 0.9rem;
    color: var(--light-text);
    text-align: left !important; /* Ensure sidebar isn't justified */
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.social-links a {
    color: var(--text-color);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 500;
}

.social-links a i {
    color: var(--primary-color);
    width: 18px;
    text-align: center;
}

/* Main Body */
.main-body {
    flex: 1;
}

.main-body p {
    text-align: justify;
    margin-bottom: 1.2rem;
    overflow-wrap: break-word;
    hyphens: auto;
}

header {
    margin-bottom: 3rem;
}

.nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--light-text);
    font-weight: 400;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    border-bottom: 1px solid var(--primary-color);
}

/* Headings throughout the site */
h1, h2, h3, h4 {
    color: var(--heading-color);
    font-weight: 400; /* Unbolded headers */
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
}

/* Publications */
.publications-list {
    margin-top: 2rem;
}

.pub-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1.2rem 0;
    border-bottom: 1px solid var(--border-color);
    gap: 2rem;
}

.pub-main {
    flex: 1;
}

.pub-title {
    font-weight: 400;
    margin-bottom: 0.2rem;
}

.highlighted-publications .pub-title a {
    color: var(--primary-color);
}

.all-publications .pub-title a {
    color: var(--heading-color);
}

.pub-meta {
    color: var(--light-text);
    font-size: 0.85rem;
}

.pub-venue {
    font-style: italic;
}

.pub-year {
    color: var(--light-text);
    font-size: 0.9rem;
    min-width: 50px;
    text-align: right;
}

.pub-divider {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 3rem 0;
}

footer {
    text-align: center;
    padding: 3rem 0;
    color: var(--light-text);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    margin-top: 5rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .container {
        padding: 0 1.2rem;
    }

    .site-layout {
        flex-direction: column;
        gap: 2rem;
        padding-top: 2rem;
    }

    .sidebar {
        width: 100%;
        position: static;
        text-align: center;
    }

    .profile-image {
        margin: 0 auto 1.5rem;
    }

    .social-links {
        align-items: center;
    }

    .nav-links {
        justify-content: center;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .pub-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .pub-year {
        text-align: left;
        font-weight: 500;
    }

    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.4rem;
    }
}