/* ============================================================
   EXTENDED STYLES - Teaching, Supervision, Experience, etc.
   ============================================================ */

/* Section Nav Bar */
.section-nav-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
  position: sticky;
  top: calc(var(--nav-h) + 54px);
  z-index: 800;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.snav-buttons { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.snav-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.45rem 1rem; border-radius: 50px; font-size: 0.83rem; font-weight: 600;
  border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text-secondary);
  cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.snav-btn:hover { border-color: var(--secondary); color: var(--secondary); }
.snav-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* Section Panels */
.section-panel { display: none; padding: 3rem 0; }
.section-panel.active { display: block; }

/* Experience */
.exp-filter-row { display: flex; gap: 0.5rem; margin-bottom: 1.75rem; flex-wrap: wrap; }
.exp-filter-btn {
  padding: 0.4rem 1rem; border-radius: 50px; font-size: 0.83rem; font-weight: 600;
  border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.exp-filter-btn:hover { border-color: var(--secondary); color: var(--secondary); }
.exp-filter-btn.active { background: var(--secondary); border-color: var(--secondary); color: #fff; }
.exp-timeline { display: flex; flex-direction: column; gap: 1.25rem; }
.exp-card {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden; transition: var(--transition); box-shadow: var(--shadow-sm);
}
.exp-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.exp-header {
  display: flex; align-items: flex-start; gap: 1rem; padding: 1.25rem 1.5rem;
  background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.exp-icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: #fff; flex-shrink: 0;
}
.exp-icon.academic { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.exp-icon.industry { background: linear-gradient(135deg, #f093fb, #f5576c); }
.exp-title-block { flex: 1; }
.exp-title-block h3 { font-size: 1rem; color: var(--primary); margin-bottom: 0.25rem; }
.exp-company { display: block; font-size: 0.85rem; color: var(--secondary); font-weight: 500; }
.exp-period { display: block; font-size: 0.78rem; color: var(--text-muted); margin-top: 0.15rem; }
.exp-badge {
  padding: 0.2rem 0.7rem; border-radius: 50px; font-size: 0.72rem; font-weight: 700;
  white-space: nowrap; align-self: flex-start; flex-shrink: 0;
}
.exp-badge.current { background: #c6f6d5; color: #276749; }
.exp-badge.past { background: #ebf4ff; color: #2b6cb0; }
.exp-duties { list-style: none; padding: 1.25rem 1.5rem; display: grid; gap: 0.55rem; }
.exp-duties li {
  font-size: 0.86rem; color: var(--text-secondary);
  padding-left: 1.25rem; position: relative; line-height: 1.6;
}
.exp-duties li::before { content: '\203A'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-bottom: 1rem; }
.skills-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 1.5rem; border: 1px solid var(--border); box-shadow: var(--shadow-sm);
}
.skills-card h3 {
  font-size: 1rem; font-weight: 700; color: var(--primary);
  margin-bottom: 1.25rem; display: flex; align-items: center; gap: 0.5rem;
}
.skills-card h3 i { color: var(--accent); }
.skill-item {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.5rem 0; border-bottom: 1px solid var(--border);
}
.skill-item:last-child { border-bottom: none; }
.skill-name {
  font-size: 0.88rem; font-weight: 500; color: var(--text);
  min-width: 90px; display: flex; align-items: center; gap: 0.4rem;
}
.skill-name i { color: var(--secondary); width: 16px; }
.skill-dots { display: flex; gap: 4px; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--border); }
.dot.filled { background: var(--secondary); }
.skill-level-label { font-size: 0.75rem; color: var(--text-muted); margin-left: auto; white-space: nowrap; }

.reviewer-tags { display: flex; flex-direction: column; gap: 0.5rem; }
.reviewer-tag {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.83rem; color: var(--text-secondary);
  padding: 0.35rem 0; border-bottom: 1px solid var(--border);
}
.reviewer-tag::before { content: "\2713"; color: var(--accent); font-weight: 700; font-size: 0.8rem; }
.reviewer-tag:last-child { border-bottom: none; }

/* Workshops */
.workshops-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.9rem; }
.workshop-card {
  display: flex; align-items: flex-start; gap: 0.85rem;
  background: var(--surface); border-radius: var(--radius-sm);
  padding: 1rem 1.1rem; border: 1px solid var(--border); transition: var(--transition);
}
.workshop-card:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.workshop-icon { font-size: 1.2rem; color: var(--secondary); flex-shrink: 0; margin-top: 2px; }
.workshop-card div strong { display: block; font-size: 0.87rem; color: var(--text); margin-bottom: 0.2rem; }
.workshop-card div span { font-size: 0.78rem; color: var(--text-muted); }

/* Awards */
.awards-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }
.award-full-card {
  display: flex; align-items: flex-start; gap: 1rem;
  background: var(--surface); border-radius: var(--radius);
  padding: 1.25rem 1.4rem; border: 1px solid var(--border); border-left: 4px solid;
  transition: var(--transition); box-shadow: var(--shadow-sm);
}
.award-full-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.award-full-card.gold   { border-left-color: #f6ad55; }
.award-full-card.silver { border-left-color: #a0aec0; }
.award-full-card.bronze { border-left-color: #cd7f32; }
.award-icon { font-size: 1.5rem; flex-shrink: 0; }
.award-full-card.gold   .award-icon { color: #f6ad55; }
.award-full-card.silver .award-icon { color: #a0aec0; }
.award-full-card.bronze .award-icon { color: #cd7f32; }
.award-info strong { display: block; font-size: 0.9rem; color: var(--text); margin-bottom: 0.2rem; }
.award-info span   { display: block; font-size: 0.8rem; color: var(--secondary); font-weight: 500; }
.award-info small  { display: block; font-size: 0.77rem; color: var(--text-muted); margin-top: 0.15rem; font-style: italic; }

/* Memberships */
.memberships-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }
.membership-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--surface); border-radius: var(--radius);
  padding: 1.25rem 1.4rem; border: 1px solid var(--border); transition: var(--transition);
}
.membership-card:hover { border-color: var(--secondary); box-shadow: var(--shadow-sm); }
.membership-icon {
  width: 46px; height: 46px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.membership-info strong { display: block; font-size: 0.9rem; color: var(--text); }
.membership-info span   { font-size: 0.8rem; color: var(--text-muted); }

/* Teaching */
.teaching-section { padding: 3rem 0 4rem; }
.teaching-filters { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-bottom: 2rem; }
.tfilter-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1rem; border-radius: 50px; font-size: 0.84rem; font-weight: 600;
  border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.tfilter-btn:hover { border-color: var(--secondary); color: var(--secondary); }
.tfilter-btn.active { background: var(--secondary); border-color: var(--secondary); color: #fff; }
.tfilter-btn .filter-count { background: rgba(0,0,0,0.12); border-radius: 50px; padding: 0 0.4rem; font-size: 0.72rem; }
.tfilter-btn.active .filter-count { background: rgba(255,255,255,0.25); }

.subjects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.subject-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 1.5rem; border: 1px solid var(--border); transition: var(--transition); box-shadow: var(--shadow-sm);
}
.subject-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.subject-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: #fff; margin-bottom: 1rem;
}
.subject-icon.ai-data          { background: linear-gradient(135deg, #667eea, #764ba2); }
.subject-icon.programming       { background: linear-gradient(135deg, #f093fb, #f5576c); }
.subject-icon.info-systems      { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.subject-icon.networks-systems  { background: linear-gradient(135deg, #43e97b, #38f9d7); }
.subject-card h4 { font-size: 0.97rem; color: var(--primary); font-weight: 700; margin-bottom: 0.5rem; }
.subject-card p  { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 1rem; line-height: 1.6; }
.subject-meta    { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.subject-badge   { padding: 0.2rem 0.65rem; border-radius: 50px; font-size: 0.72rem; font-weight: 700; }
.subject-badge.current { background: #c6f6d5; color: #276749; }
.subject-level { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; }

/* Supervision */
.supervision-section { padding: 3rem 0 4rem; }
.sup-tabs { display: flex; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.sup-tab-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.25rem; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 600;
  border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.sup-tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.sup-tab-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.sup-tab-btn .tab-badge { background: rgba(255,255,255,0.25); }
.sup-tab-btn:not(.active) .tab-badge { background: var(--secondary); color: #fff; }
.suptab-content { display: none; }
.suptab-content.active { display: block; }

.students-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.student-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 1.5rem; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition);
}
.student-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.phd-card { border-top: 4px solid var(--primary); }
.fyp-card { border-top: 4px solid var(--secondary); }
.student-header {
  display: flex; align-items: flex-start; gap: 1rem;
  margin-bottom: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border);
}
.student-avatar {
  width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: #fff; flex-shrink: 0;
}
.phd-avatar            { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.fyp-avatar.current    { background: linear-gradient(135deg, #f093fb, #f5576c); }
.fyp-avatar.completed  { background: linear-gradient(135deg, #43e97b, #38f9d7); }
.student-title-block { flex: 1; }
.student-title-block h3 { font-size: 0.95rem; color: var(--primary); margin-bottom: 0.2rem; }
.student-degree { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.student-status-badge {
  padding: 0.2rem 0.7rem; border-radius: 50px; font-size: 0.72rem; font-weight: 700;
  align-self: flex-start; white-space: nowrap;
}
.student-status-badge.current   { background: #c6f6d5; color: #276749; }
.student-status-badge.completed { background: #ebf4ff; color: #2b6cb0; }
.student-details { display: flex; flex-direction: column; gap: 0.6rem; }
.student-detail-item {
  display: flex; align-items: flex-start; gap: 0.6rem;
  font-size: 0.85rem; color: var(--text-secondary);
}
.student-detail-item i { color: var(--accent); width: 16px; margin-top: 2px; flex-shrink: 0; }
.student-detail-item strong { color: var(--text); }

.fyp-filter-row { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.fyp-filter-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.4rem 0.9rem; border-radius: 50px; font-size: 0.82rem; font-weight: 600;
  border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.fyp-filter-btn:hover  { border-color: var(--secondary); color: var(--secondary); }
.fyp-filter-btn.active { background: var(--secondary); border-color: var(--secondary); color: #fff; }
.fyp-filter-btn .filter-count { background: rgba(0,0,0,0.10); border-radius: 50px; padding: 0 0.35rem; font-size: 0.72rem; }
.fyp-filter-btn.active .filter-count { background: rgba(255,255,255,0.25); }

.coming-soon {
  text-align: center; padding: 4rem 2rem; color: var(--text-muted);
  background: var(--surface); border-radius: var(--radius); border: 2px dashed var(--border);
}
.coming-soon i { font-size: 2.5rem; margin-bottom: 1rem; opacity: 0.4; display: block; }
.coming-soon h3 { color: var(--text-secondary); margin-bottom: 0.5rem; }
.coming-soon p { font-size: 0.9rem; }

/* Research Projects */
.projects-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem;
}
.project-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 1.5rem; border: 1px solid var(--border);
  border-left: 4px solid var(--secondary); box-shadow: var(--shadow-sm); transition: var(--transition);
}
.project-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-left-color: var(--accent); }
.project-badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  padding: 0.2rem 0.65rem; border-radius: 50px;
  background: var(--surface-2); color: var(--secondary); border: 1px solid var(--border);
  margin-bottom: 0.75rem;
}
.project-card h4 { font-size: 0.95rem; color: var(--primary); font-weight: 700; margin-bottom: 0.6rem; }
.project-card p  { font-size: 0.84rem; color: var(--text-secondary); line-height: 1.65; margin: 0; }

/* Media Gallery */
.media-section { padding: 3rem 0 4rem; }
.media-filters { display: flex; gap: 0.55rem; margin-bottom: 2rem; flex-wrap: wrap; }
.media-filter-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1rem; border-radius: 50px; font-size: 0.84rem; font-weight: 600;
  border: 1.5px solid var(--border); background: var(--surface-2); color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.media-filter-btn:hover  { border-color: var(--secondary); color: var(--secondary); }
.media-filter-btn.active { background: var(--secondary); border-color: var(--secondary); color: #fff; }
.media-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
}
.media-card {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.media-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.media-thumb {
  position: relative; overflow: hidden; cursor: pointer;
  aspect-ratio: 16/9; background: var(--surface-2);
}
.media-thumb img {
  width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease;
}
.media-card:hover .media-thumb img { transform: scale(1.05); }
.media-placeholder {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; color: var(--border);
}
.media-play-btn, .media-zoom-btn {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0); transition: background 0.3s;
}
.media-play-btn i, .media-zoom-btn i {
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255,255,255,0.15); backdrop-filter: blur(4px);
  color: #fff; font-size: 1.1rem; display: flex; align-items: center; justify-content: center;
  border: 2px solid rgba(255,255,255,0.5); opacity: 0; transition: opacity 0.3s, transform 0.3s;
  transform: scale(0.8);
}
.media-card:hover .media-play-btn i,
.media-card:hover .media-zoom-btn i { opacity: 1; transform: scale(1); }
.media-card:hover .media-play-btn,
.media-card:hover .media-zoom-btn { background: rgba(0,0,0,0.25); }
.video-thumb { cursor: pointer; }
.media-info { padding: 1rem 1.25rem 1.25rem; }
.media-info h4 { font-size: 0.92rem; color: var(--text); font-weight: 700; margin-bottom: 0.35rem; }
.media-info p  { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 0.75rem; }
.media-meta { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.media-date { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.3rem; }
.media-type-badge {
  font-size: 0.7rem; font-weight: 700; padding: 0.15rem 0.55rem; border-radius: 50px;
  display: inline-flex; align-items: center; gap: 0.3rem;
}
.media-type-badge.image { background: #ebf8ff; color: #2b6cb0; }
.media-type-badge.video { background: #fef3c7; color: #92400e; }
.media-type-badge.social { background: #f0fdf4; color: #166534; }

/* Social media cards */
.media-card.social .media-thumb { background: #f8fafc; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 0.5rem; min-height: 140px; text-decoration: none; transition: background 0.2s; }
.media-card.social .media-thumb:hover { background: #f0f4f8; }
.social-platform-icon { font-size: 2.6rem; }
.social-platform-icon.linkedin { color: #0077b5; }
.social-platform-icon.facebook { color: #1877f2; }
.social-platform-icon.instagram { color: #e1306c; }
.social-platform-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.social-view-btn { display: inline-flex; align-items: center; gap: 0.3rem; margin-top: 0.5rem; padding: 0.3rem 0.85rem; border-radius: 50px; font-size: 0.75rem; font-weight: 700; color: #fff; text-decoration: none; }
.social-view-btn.linkedin { background: #0077b5; }
.social-view-btn.facebook { background: #1877f2; }
.social-view-btn.instagram { background: linear-gradient(45deg,#f09433,#e6683c,#dc2743,#cc2366,#bc1888); }

/* Lightbox / Video Modal */
.lightbox-overlay {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,0.92); display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.lb-close {
  position: absolute; top: 1rem; right: 1rem;
  width: 44px; height: 44px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.1); color: #fff; font-size: 1.1rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: var(--transition);
  z-index: 9001;
}
.lb-close:hover { background: rgba(255,255,255,0.25); border-color: rgba(255,255,255,0.6); }
.lb-img { max-width: 90vw; max-height: 85vh; border-radius: var(--radius); object-fit: contain; }
.lb-title {
  position: absolute; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.85); font-size: 0.9rem; font-weight: 500;
  background: rgba(0,0,0,0.5); padding: 0.4rem 1rem; border-radius: 50px;
  max-width: 80vw; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.video-container {
  width: min(900px, 92vw); aspect-ratio: 16/9;
  border-radius: var(--radius); overflow: hidden;
}
.video-container iframe { width: 100%; height: 100%; }

/* Responsive */
@media (max-width: 960px) {
  .skills-grid     { grid-template-columns: repeat(2, 1fr); }
  .subjects-grid   { grid-template-columns: repeat(2, 1fr); }
  .students-grid   { grid-template-columns: 1fr; }
  .awards-grid     { grid-template-columns: 1fr; }
  .memberships-grid{ grid-template-columns: 1fr; }
  .workshops-grid  { grid-template-columns: 1fr; }
  .projects-grid   { grid-template-columns: 1fr; }
  .media-grid      { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .skills-grid   { grid-template-columns: 1fr; }
  .subjects-grid { grid-template-columns: 1fr; }
  .media-grid    { grid-template-columns: 1fr; }
  .snav-btn { font-size: 0.78rem; padding: 0.38rem 0.75rem; }
  .section-nav-bar { top: calc(var(--nav-h) + 48px); }
}