/* ================================
   Simple Academic Homepage Template 5
   ================================
   
   Left sidebar navigation design.
   Clean layout with sidebar navigation.
   
   HOW TO CUSTOMIZE:
   - Adjust sidebar width
   - Change colors
   - Modify spacing
   ================================ */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #ffffff;
    overflow-x: hidden;
}

img,
svg {
    max-width: 100%;
    height: auto;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: #f8f9fa;
    border-right: 1px solid #e0e0e0;
    padding: 40px 30px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-content {
    text-align: center;
}

.sidebar-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
    border: 3px solid #ddd;
}

.sidebar-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: #1a1a1a;
}

.sidebar-title {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 3px;
}

.sidebar-affiliation {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 30px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 30px;
    text-align: left;
}

.nav-link {
    padding: 10px 15px;
    color: #555;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.nav-link:hover {
    background: #e9ecef;
    color: #000;
}

.nav-link.active {
    background: #333;
    color: #fff;
}

.sidebar-social {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.social-icon {
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #666;
    transition: opacity 0.2s ease;
}

.social-icon img {
    width: 24px;
    height: 24px;
    display: block;
}

.social-icon:hover {
    opacity: 0.75;
}

/* Main content */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 50px 60px;
    max-width: 900px;
}

.content-section {
    margin-bottom: 50px;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1a1a1a;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e0e0;
}

.section-text {
    font-size: 1rem;
    color: #444;
    line-height: 1.8;
}

/* Research list */
.research-list {
    list-style: none;
    padding-left: 0;
}

.research-list li {
    font-size: 1rem;
    color: #444;
    line-height: 1.8;
    margin-bottom: 12px;
    padding-left: 0;
}

.research-list strong {
    color: #1a1a1a;
}

/* Publications */
.pub-item {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

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

.pub-title {
    font-size: 1.05rem;
    color: #1a1a1a;
    font-weight: 500;
    margin-bottom: 5px;
    line-height: 1.5;
}

.pub-authors {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 3px;
}

.pub-venue {
    font-size: 0.9rem;
    color: #888;
    font-style: italic;
    margin-bottom: 8px;
}

.pub-links {
    display: flex;
    gap: 10px;
}

.pub-links a {
    font-size: 0.85rem;
    color: #0066cc;
    text-decoration: none;
}

.pub-links a:hover {
    text-decoration: underline;
}

/* Education */
.edu-item {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

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

.edu-degree {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 5px;
}

.edu-school {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 3px;
}

.edu-period {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 3px;
}

.edu-details {
    font-size: 0.85rem;
    color: #999;
}

/* Experience */
.exp-item {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

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

.exp-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 5px;
}

.exp-company {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 3px;
}

.exp-period {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 8px;
}

.exp-desc {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.6;
}

/* Responsive design */
@media (max-width: 968px) {
    .sidebar {
        width: 200px;
    }

    .main-content {
        margin-left: 200px;
        padding: 40px 40px;
    }

    .page-footer {
        margin-left: 200px;
        padding: 25px 40px;
    }
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
        padding: 30px 20px;
    }

    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .main-content {
        margin-left: 0;
        padding: 30px 20px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .page-footer {
        margin-left: 0;
        padding: 25px 20px;
    }
}

@media (max-width: 480px) {
    .sidebar-photo {
        width: 100px;
        height: 100px;
    }

    .sidebar-name {
        font-size: 1.3rem;
    }

    .main-content {
        padding: 25px 15px;
    }

    .section-title {
        font-size: 1.3rem;
    }
}

/* Footer */
.page-footer {
    margin-left: 250px;
    margin-top: 60px;
    padding: 25px 60px;
    text-align: center;
    font-size: 0.85rem;
    color: #999;
    border-top: 1px solid #e0e0e0;
}

.page-footer a {
    color: #666;
    text-decoration: none;
    transition: color 0.2s ease;
}

.page-footer a:hover {
    color: #333;
    text-decoration: underline;
}