/* Section */
.section {
    margin-bottom: 2.5rem;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border);
    letter-spacing: -0.01em;
}

.page-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

/* Timeline items */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.timeline-item {
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.timeline-role {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}

.timeline-org {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.timeline-period {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-top: 0.25rem;
    margin-bottom: 0.5rem;
}

.timeline-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    display: inline-block;
    padding: 0.15rem 0.55rem;
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: 0.75rem;
    border-radius: 3px;
    border: 1px solid var(--border);
}

/* Tabs */
.tabs {
    margin-bottom: 2rem;
}

.tab-buttons {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.tab-button {
    background: none;
    border: none;
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    font-family: var(--font-sans);
    transition: color 0.2s;
}

.tab-button:hover {
    color: var(--text-secondary);
}

.tab-button.active {
    color: var(--text-primary);
    border-bottom-color: var(--text-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Skills grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
}

.skill-category h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.2rem 0;
}

.skill-list li::before {
    content: "- ";
    color: var(--text-muted);
}

/* Publications */
.year-group {
    margin-bottom: 1.5rem;
}

.year-header {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.publication-card {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.publication-card:last-child {
    border-bottom: none;
}

.pub-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.pub-authors {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.15rem;
}

.pub-venue {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

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

.pub-type,
.pub-status {
    display: inline-block;
    font-size: 0.75rem;
    padding: 0.1rem 0.4rem;
    background: var(--tag-bg);
    color: var(--tag-text);
    border-radius: 3px;
    border: 1px solid var(--border);
    margin-left: 0.35rem;
    font-style: normal;
}

.pub-link {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    border-bottom: none !important;
}

.pub-link:hover {
    color: var(--text-primary);
}

/* Projects grid */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.project-card {
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.project-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-primary);
}

.project-period {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-bottom: 0.5rem;
}

.project-card p {
    font-size: 0.88rem;
    line-height: 1.6;
}

.project-tags {
    margin-top: 0.6rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

/* Courses grid */
.courses-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.course-item {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: 0.8rem;
    border-radius: 3px;
    border: 1px solid var(--border);
}

/* Mentors */
.mentors-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mentor-card {
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.mentor-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.mentor-institution {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.mentor-area {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Awards */
.awards-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.award-card {
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.award-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.award-org {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.award-year {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-top: 0.25rem;
}

/* Gallery */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.gallery-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.gallery-caption {
    padding: 0.75rem 1rem;
}

.gallery-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.gallery-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    margin: 0 auto;
}

.lightbox-caption {
    text-align: center;
    padding: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1rem; top: 50%; transform: translateY(-50%); }

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    color: var(--text-primary);
}

/* Stats */
.stats-grid {
    display: flex;
    gap: 2rem;
}

.stat-card {
    text-align: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Social Links */
.social-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.social-link {
    font-size: 0.8rem;
    color: var(--text-muted) !important;
    border-bottom: none !important;
    padding: 0.25rem 0;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.social-link:hover {
    color: var(--text-primary) !important;
}

.social-link::before {
    content: "";
    display: inline-block;
    width: 14px;
    height: 14px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.6;
}

.social-link[data-icon="email"]::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z'/%3E%3Cpolyline points='22,6 12,13 2,6'/%3E%3C/svg%3E");
}

.social-link[data-icon="linkedin"]::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23999'%3E%3Cpath d='M20.447 20.452h-3.554v-5.569c0-1.328-.027-3.037-1.852-3.037-1.853 0-2.136 1.445-2.136 2.939v5.667H9.351V9h3.414v1.561h.046c.477-.9 1.637-1.85 3.37-1.85 3.601 0 4.267 2.37 4.267 5.455v6.286zM5.337 7.433a2.062 2.062 0 01-2.063-2.065 2.064 2.064 0 112.063 2.065zm1.782 13.019H3.555V9h3.564v11.452zM22.225 0H1.771C.792 0 0 .774 0 1.729v20.542C0 23.227.792 24 1.771 24h20.451C23.2 24 24 23.227 24 22.271V1.729C24 .774 23.2 0 22.222 0h.003z'/%3E%3C/svg%3E");
}

.social-link[data-icon="scholar"]::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23999'%3E%3Cpath d='M12 24a7 7 0 110-14 7 7 0 010 14zm0-24L0 9.5l4.838 3.94A8 8 0 0112 9a8 8 0 017.162 4.44L24 9.5z'/%3E%3C/svg%3E");
}

.social-link[data-icon="cv"]::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/%3E%3Cpolyline points='14 2 14 8 20 8'/%3E%3Cline x1='16' y1='13' x2='8' y2='13'/%3E%3Cline x1='16' y1='17' x2='8' y2='17'/%3E%3Cpolyline points='10 9 9 9 8 9'/%3E%3C/svg%3E");
}

.social-link[data-icon="github"]::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23999'%3E%3Cpath d='M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12'/%3E%3C/svg%3E");
}