/* =============================================
   ABOUT PAGE STYLES
   ============================================= */

.about-hero {
  padding: 8rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: center;
}

.about-photo-container {
  position: relative;
}

.about-photo-wrap {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  aspect-ratio: 3/4;
  max-width: 380px;
  margin: 0 auto;
}

.about-photo-wrap img {
  border-radius: var(--border-radius-lg);
  border-top: 5px var(--accent-gold);
  border-bottom: 5px solid var(--accent-gold);
  border-left: 5px solid var(--accent-gold);
  border-right: 5px solid var(--accent-gold);
}

.about-photo-wrap:hover img {
  transform: scale(1.04);
}

.about-photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,14,26,0.8) 0%, transparent 50%);
  pointer-events: none;
}

.about-photo-info {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
}

.about-photo-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
}

.about-photo-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  text-transform: uppercase;
}

.about-decor-shape {
  position: absolute;
  width: 200px;
  height: 200px;
  border: 1px solid var(--border-color);
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  top: -20px;
  right: -20px;
  animation: rotate 25s linear infinite;
  z-index: -1;
  opacity: 0.4;
}

.about-content h2 {
  margin-bottom: 0.5rem;
}

.about-tagline {
  font-size: 1.1rem;
  color: var(--accent-gold);
  font-style: italic;
  margin-bottom: 1.5rem;
  font-family: var(--font-body);
}

.about-description p {
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

.about-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 2rem 0;
}

.about-info-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.about-info-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.about-info-value {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.about-expertise {
  margin-top: 2rem;
}

.about-expertise h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
}

.expertise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.expertise-tag {
  padding: 0.4rem 1rem;
  border-radius: var(--border-radius-full);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.expertise-tag:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

/* Achievements in about */
.about-achievements {
  padding: 5rem 0;
  background: var(--bg-secondary);
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.achievement-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  position: relative;
}

.achievement-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  display: block;
  margin-bottom: 0.5rem;
}

.achievement-label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .about-info-grid { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
}

/* =============================================
   SKILLS PAGE STYLES
   ============================================= */

.skills-hero {
  padding: 8rem 0 5rem;
  text-align: center;
}

.skills-categories {
  padding: 2rem 0 5rem;
}

.skill-category {
  margin-bottom: 4rem;
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.skill-category-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.skill-category-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
}

.skill-category-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius-full);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: var(--transition-med);
  position: relative;
  overflow: hidden;
}

.skill-card::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: var(--gradient-gold);
  transition: width var(--transition-med);
}

.skill-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.skill-card:hover::after {
  width: 100%;
}

.skill-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.skill-icon {
  font-size: 1.8rem;
}

.skill-level-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.6rem;
  border-radius: var(--border-radius-full);
}

.level-expert {
  background: rgba(212, 175, 55, 0.15);
  color: var(--accent-gold);
  border: 1px solid rgba(212, 175, 55, 0.3);
}

.level-advanced {
  background: rgba(74, 158, 255, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(74, 158, 255, 0.25);
}

.level-intermediate {
  background: rgba(32, 178, 170, 0.1);
  color: var(--accent-teal);
  border: 1px solid rgba(32, 178, 170, 0.2);
}

.skill-name {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.skill-bar-wrap {
  height: 5px;
  background: var(--bg-secondary);
  border-radius: 3px;
  overflow: hidden;
}

.skill-bar {
  height: 100%;
  background: var(--gradient-gold);
  border-radius: 3px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Soft Skills */
.soft-skills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 3rem;
}

.soft-skill-pill {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.5rem;
  border-radius: var(--border-radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition-med);
}

.soft-skill-pill:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}

.skill-icon i {
  font-size: 1.8rem;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.soft-skill-icon {
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .skills-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}

/* =============================================
   EXPERIENCE PAGE STYLES
   ============================================= */

.experience-hero {
  padding: 8rem 0 5rem;
  text-align: center;
}

.exp-tabs {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 4rem;
}

.exp-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  border-radius: var(--border-radius-full);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition-med);
}

.exp-tab-btn:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.exp-tab-btn.active {
  background: var(--gradient-gold);
  border-color: transparent;
  color: #0a0e1a;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.35);
}

.exp-tab-icon {
  font-size: 1.1rem;
}

/* Timeline */
.timeline-panel {
  display: none;
}

.timeline-panel.active {
  display: block;
  animation: fadeInUp 0.5s ease forwards;
}

.timeline {
  position: relative;
  padding-left: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-gold), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -3.65rem;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2.5px solid var(--accent-gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.15);
  z-index: 1;
}

.timeline-item.current::before {
  background: var(--accent-gold);
  animation: pulse-ring 2s ease-out infinite;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.75rem 2rem;
  transition: var(--transition-med);
}

.timeline-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.timeline-role {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.2);
  padding: 0.3rem 0.8rem;
  border-radius: var(--border-radius-full);
  white-space: nowrap;
}

.timeline-org {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--accent-gold);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.timeline-location {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.timeline-description {
  font-size: 0.97rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.timeline-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

@media (max-width: 600px) {
  .exp-tab-btn { padding: 0.7rem 1.2rem; font-size: 0.82rem; }
  .timeline { padding-left: 2rem; }
  .timeline-item::before { left: -2.65rem; }
}

/* =============================================
   RESEARCH PAGE STYLES
   ============================================= */

.research-hero {
  padding: 8rem 0 5rem;
  text-align: center;
}

.research-tabs {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 4rem;
}

.research-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--border-radius-full);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition-med);
}

.research-tab-btn:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.research-tab-btn.active {
  background: var(--gradient-gold);
  border-color: transparent;
  color: #0a0e1a;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.35);
}

.research-panel {
  display: none;
}

.research-panel.active {
  display: block;
  animation: fadeInUp 0.5s ease forwards;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.75rem;
}

.research-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.75rem;
  transition: var(--transition-med);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-gold);
  transform: scaleX(0);
  transition: transform var(--transition-med);
}

.research-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-gold);
  transform: translateY(-4px);
}

.research-card:hover::before {
  transform: scaleX(1);
}

.research-card-type {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border-radius: var(--border-radius-full);
  margin-bottom: 1rem;
}

.type-paper { background: rgba(212,175,55,0.12); color: var(--accent-gold); border: 1px solid rgba(212,175,55,0.25); }
.type-patent { background: rgba(74,158,255,0.1); color: var(--accent-blue); border: 1px solid rgba(74,158,255,0.2); }
.type-copyright { background: rgba(32,178,170,0.1); color: var(--accent-teal); border: 1px solid rgba(32,178,170,0.2); }
.type-project { background: rgba(192,57,43,0.1); color: var(--accent-rose); border: 1px solid rgba(192,57,43,0.2); }
.type-fdp { background: rgba(150,100,200,0.12); color: #a87dd4; border: 1px solid rgba(150,100,200,0.25); }

.research-card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.research-card-meta {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.research-card-abstract {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.research-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.research-card-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.research-card-arrow {
  font-size: 1.1rem;
  color: var(--accent-gold);
  transition: transform var(--transition-fast);
}

.research-card:hover .research-card-arrow {
  transform: translateX(4px);
}

/* FDP List layout */
.fdp-grid {
  display: grid;
  gap: 1.25rem;
}

.fdp-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem 2rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: center;
  transition: var(--transition-med);
  cursor: pointer;
}

.fdp-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.fdp-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  line-height: 1;
  width: 40px;
}

.fdp-info { }

.fdp-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.fdp-meta {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.fdp-cert-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-full);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.25);
  color: var(--accent-gold);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.fdp-cert-btn:hover {
  background: rgba(212, 175, 55, 0.2);
}

/* Research Modal */
.research-modal-badge {
  margin-bottom: 1.5rem;
}

.research-modal-title {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.research-modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.research-modal-meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.research-modal-meta-item strong {
  color: var(--text-primary);
}

.research-modal-abstract {
  margin-bottom: 2rem;
}

.research-modal-abstract h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
}

.research-modal-abstract p {
  font-size: 1rem;
  line-height: 1.85;
}

.research-modal-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  border-radius: var(--border-radius-full);
  background: var(--gradient-gold);
  color: #0a0e1a;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-med);
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
}

.research-modal-link:hover {
  box-shadow: 0 8px 30px rgba(212, 175, 55, 0.5);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .research-grid { grid-template-columns: 1fr; }
  .fdp-card { grid-template-columns: 1fr; }
  .fdp-number { display: none; }
}