/* --- Global Reset & Theme Variables --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-color: #1A2C20;
    --sidebar-bg: #2D4837;
    --text-color: #E2F0E8;
    --text-muted: #A0C0AE;
    --heading-color: #FFFFFF;
    --border-color: #4A6855;
    --accent-color: #48BB78;
    --sidebar-width: 280px;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
    --bg-color: #f8f8f8;
    --sidebar-bg: #ffffff;
    --text-color: #2D4837;
    --text-muted: #719680;
    --heading-color: #1A2C20;
    --border-color: #E2F0E8;
    --accent-color: #2F855A;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.3s;
}

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

.mlink {
    color: var(--accent-color);
    text-decoration: none;
    direction: rtl;
    unicode-bidi: bidi-override;
}

/* --- Layout Structure --- */
.container {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

/* --- Sidebar Layout --- */
.sidebar {
    background-color: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center;
    transition: background-color 0.3s, border-color 0.3s;
}

.profile-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    border: 3px solid var(--accent-color);
}

.sidebar h1 {
    font-size: 1.0rem;
    margin-bottom: 0.25rem;
    color: var(--heading-color);
}

.sidebar .title {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.nav-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    list-style: none;
    margin-bottom: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.25rem 0.5rem;
    transition: color 0.2s;
}

.nav-links a.active,
.nav-links a:hover {
    color: var(--accent-color);
}

.social-links {
    justify-content: center;
}

.social-links a {
    display: inline-block;
    margin: 0 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--accent-color);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.8rem;
    margin-top: 1rem;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    background-color: var(--border-color);
    color: var(--accent-color);
}

/* --- Main Content Layout --- */
.main-content {
    padding: 2rem;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

section {
    display: none;
    margin-bottom: 3rem;
}

section.active {
    display: block;
}

h2 {
    font-size: 1.75rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--heading-color);
}

.item {
    margin-bottom: 1.25rem;
}

.item-title {
    font-weight: 600;
    color: var(--heading-color);
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Media Query: Desktop Fixed Viewports --- */
@media (min-width: 992px) {
    body {
        flex-direction: row;
        justify-content: center;
    }

    .container {
        display: grid;
        grid-template-columns: var(--sidebar-width) 1fr;
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
    }

    .sidebar {
        position: sticky;
        top: 0;
        height: 100vh;
        border-right: 1px solid var(--border-color);
        border-bottom: none;
        padding: 4rem 2rem 2rem 2rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        overflow-y: auto;
        scrollbar-width: thin;
    }

    .sidebar::-webkit-scrollbar {
        width: 6px;
    }

    .sidebar::-webkit-scrollbar-track {
        background: transparent;
    }

    .sidebar::-webkit-scrollbar-thumb {
        background-color: var(--border-color);
        border-radius: 10px;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
        text-align: center;
        margin-top: 1rem;
    }

    .nav-links a {
        display: block;
        width: 100%;
        padding: 0.5rem;
    }

    .social-links {
        margin-top: 3rem;
        padding-bottom: 2rem;
    }

    .main-content {
        padding: 4rem 3rem;
        width: 100%;
        box-sizing: border-box;
    }
}

/* Publication Formatting --- */
.pub-category h3 {
    font-size: 1.2rem;
    color: var(--heading-color);
    margin: 2rem 0 1rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.pub-item {
    padding: 1rem 0;
    border-bottom: 1px dashed var(--border-color);
}

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

.pub-title {
    font-weight: 600;
    color: var(--heading-color);
    font-size: 1.05rem;
}

.pub-authors {
    font-size: 0.95rem;
    color: var(--text-color);
}

.pub-authors strong {
    color: var(--accent-color);
}

.pub-venue {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.pub-links {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.75rem;
}

.pub-link {
    font-size: 0.85rem;
    color: var(--accent-color);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    padding: 0;
}

.pub-link:hover {
    text-decoration: underline;
}

/* --- News Feed --- */
.news-post {
    background-color: var(--sidebar-bg);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 0 8px 8px 0;
    border-top: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.news-post:hover {
    transform: translateX(4px);
}

.news-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.news-body {
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.6;
}