/* =========================================================
   About page — single-page centered layout
   ========================================================= */

.about-container {
  max-width: 980px;
  position: relative;
}

.about-container::before,
.about-container::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
  z-index: -1;
}

.about-container::before {
  top: -35px;
  right: -40px;
  background: rgba(37, 99, 235, 0.15);
}

.about-container::after {
  bottom: 90px;
  left: -50px;
  background: rgba(124, 58, 237, 0.12);
}

.profile-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.9fr);
  gap: 1.7rem;
  align-items: stretch;
  margin-bottom: 2.15rem;
}

.profile-avatar {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, #7c3aed 100%);
  color: #fff;
  font-size: 2.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.34);
}

.hero-copy,
.hero-card {
  position: relative;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 22px;
  padding: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.1);
}

.hero-copy::before,
.hero-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.45) 0%, transparent 70%);
  pointer-events: none;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  display: inline-flex;
  align-self: flex-start;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(219, 234, 254, 0.9) 0%, rgba(224, 231, 255, 0.9) 100%);
  border: 1px solid rgba(255, 255, 255, 0.65);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.profile-name {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
  color: var(--color-text);
  letter-spacing: -0.015em;
}

.profile-role {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-weight: 500;
}

.profile-summary {
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: 1.5rem;
  line-height: 1.95;
}

.profile-links {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.profile-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.15rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.profile-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 14px 24px rgba(37, 99, 235, 0.16);
}

.profile-link:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.4);
  outline-offset: 2px;
}

.link-icon {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.hero-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.quick-stats {
  display: grid;
  gap: 0.85rem;
}

.stat-item {
  background: linear-gradient(135deg, rgba(249, 250, 252, 0.9) 0%, rgba(239, 246, 255, 0.82) 100%);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-item:hover {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.2);
}

.stat-item strong {
  display: block;
  color: var(--color-text);
  font-size: 1.15rem;
}

.stat-item span {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.about-sections {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.7rem;
}

.about-card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 18px;
  padding: 1.75rem;
  backdrop-filter: blur(11px);
  -webkit-backdrop-filter: blur(11px);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.09);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.about-card:hover {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 20px 36px rgba(15, 23, 42, 0.13);
}

.highlight-card {
  grid-column: 1 / -1;
}

.card-heading {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(37, 99, 235, 0.14);
  position: relative;
}

.card-heading::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 72px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent) 0%, #7c3aed 100%);
}

.card-icon {
  font-size: 1.3rem;
  filter: drop-shadow(0 2px 8px rgba(37, 99, 235, 0.25));
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.focus-item {
  padding: 1.15rem;
  border-radius: 14px;
  background: rgba(249, 250, 252, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.focus-item:hover {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.1);
}

.focus-item h3 {
  font-size: 1rem;
  margin-bottom: 0.45rem;
}

.focus-item p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  background: rgba(249, 250, 252, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.62);
}

.info-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
}

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

/* =========================================================
   Chips grid (teaching)
   ========================================================= */
.chips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.chip {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.15rem;
  border-radius: 10px;
  background: rgba(249, 250, 252, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.chip:hover {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 12px 20px rgba(15, 23, 42, 0.1);
}

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

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

.ltr-text {
  direction: ltr;
  unicode-bidi: embed;
}

/* =========================================================
   Timeline
   ========================================================= */
.timeline {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-right: 2px solid rgba(37, 99, 235, 0.15);
  padding-right: 1rem;
  margin-right: 1rem;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  position: relative;
  padding: 0 1.5rem 2rem 0;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-surface);
  flex-shrink: 0;
  position: absolute;
  right: -8px;
  top: 8px;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.timeline-body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  background: rgba(249, 250, 252, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.62);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  flex: 1;
}

.timeline-item:hover .timeline-body {
  transform: translateX(-3px);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.1);
}

@media (prefers-reduced-motion: reduce) {
  .about-card,
  .focus-item,
  .chip,
  .profile-link,
  .stat-item,
  .timeline-body {
    transition: none;
  }
}

.timeline-role {
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
}

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

@media (max-width: 860px) {
  .profile-hero,
  .about-sections,
  .focus-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-card {
    padding: 1.55rem;
  }
}

@media (max-width: 600px) {
  .hero-copy,
  .hero-card,
  .about-card {
    padding: 1.25rem;
  }

  .info-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .chips-grid {
    grid-template-columns: 1fr;
  }

  .profile-name {
    font-size: 1.65rem;
  }

  .profile-links {
    flex-direction: column;
  }

  .timeline {
    margin-right: 0.25rem;
    padding-right: 0.8rem;
  }

  .timeline-item {
    padding-right: 0.95rem;
  }

  .timeline-dot {
    right: -7px;
  }
}

html[data-theme="dark"] .hero-copy,
html[data-theme="dark"] .hero-card,
html[data-theme="dark"] .about-card {
  background: rgba(15, 23, 42, 0.66);
  border-color: rgba(100, 116, 139, 0.35);
  box-shadow: 0 18px 36px rgba(2, 6, 23, 0.35);
}

html[data-theme="dark"] .eyebrow {
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.28) 0%, rgba(67, 56, 202, 0.25) 100%);
  border-color: rgba(100, 116, 139, 0.35);
  color: #bfdbfe;
}

html[data-theme="dark"] .profile-link,
html[data-theme="dark"] .stat-item,
html[data-theme="dark"] .focus-item,
html[data-theme="dark"] .info-item,
html[data-theme="dark"] .chip,
html[data-theme="dark"] .timeline-body {
  background: rgba(30, 41, 59, 0.84);
  border-color: rgba(100, 116, 139, 0.32);
  box-shadow: none;
}

html[data-theme="dark"] .card-heading {
  border-bottom-color: rgba(96, 165, 250, 0.24);
}

html[data-theme="dark"] .timeline {
  border-right-color: rgba(96, 165, 250, 0.26);
}

html[data-theme="dark"] .timeline-dot {
  border-color: #111827;
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}