/* Shared tabbed layout (principal, vision, scholarships, etc.) */

.principal-section {
  padding: 5.5rem 0;
  background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
}

.principal-section .section-header {
  margin-bottom: 2.5rem;
}

.principal-layout {
  display: grid;
  grid-template-columns: minmax(260px, 300px) 1fr;
  gap: 1.75rem;
  align-items: start;
}

.principal-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.principal-tab {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  background: var(--white);
  color: var(--gray-600);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-align: left;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(30, 58, 95, 0.04);
}

.principal-tab i {
  font-size: 0.85rem;
  color: var(--gray-400);
  flex-shrink: 0;
}

.principal-tab:hover {
  border-color: rgba(255, 184, 0, 0.5);
  color: var(--navy);
}

.principal-tab.active {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
  box-shadow: 0 10px 28px rgba(30, 58, 95, 0.22);
}

.principal-tab.active i {
  color: var(--gold);
}

.principal-panel-wrap {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--ab-radius-lg, 24px);
  box-shadow: 0 16px 48px rgba(30, 58, 95, 0.1);
  overflow: hidden;
}

.principal-panel {
  display: none;
  padding: 2.75rem 3rem;
  animation: principalFadeIn 0.35s ease;
}

.principal-panel.active {
  display: block;
}

@keyframes principalFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.principal-tab-intro {
  margin-bottom: 1.75rem;
}

.principal-tab-intro h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-top: 0.5rem;
}

.principal-panel-body p {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.85;
  margin-bottom: 1.1rem;
  text-align: justify;
}

.principal-panel-body p:last-child {
  margin-bottom: 0;
}

.principal-panel-body strong {
  color: var(--navy);
  font-weight: 600;
}

.principal-membership-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-width: 400px;
}

.principal-membership-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  background: var(--off-white);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--navy);
}

.principal-membership-list li i {
  color: var(--gold-dark);
  font-size: 1.15rem;
}

.principal-info-block {
  padding: 1.35rem 1.5rem;
  background: var(--off-white);
  border-left: 4px solid var(--gold);
  border-radius: 0 14px 14px 0;
  margin-bottom: 1.15rem;
}

.principal-info-block p {
  text-align: left;
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .principal-layout {
    grid-template-columns: 1fr;
  }

  .principal-tabs {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .principal-tab {
    flex: 1 1 calc(50% - 0.25rem);
    font-size: 0.75rem;
    padding: 0.85rem 0.9rem;
  }

  .principal-panel {
    padding: 2rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .principal-tab {
    flex: 1 1 100%;
  }
}

.principal-profile-head {
  text-align: center;
  max-width: 280px;
  margin: 0 auto 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-200);
}

.principal-profile-photo {
  width: 200px;
  height: 250px;
  margin: 0 auto 1.25rem;
  border-radius: var(--ab-radius-lg, 24px);
  overflow: hidden;
  border: 3px solid rgba(255, 184, 0, 0.4);
  box-shadow: var(--shadow-lg);
}

.principal-profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.principal-profile-head h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.35rem;
  line-height: 1.35;
}

.principal-profile-head p {
  font-size: 0.86rem;
  color: var(--gray-600);
  line-height: 1.55;
}

/* ---- Principal page — scroll layout with intro, stats & sections ---- */

body.principal-page .animate-on-scroll {
  opacity: 1;
  transform: none;
}

body.principal-page .principal-intro {
  padding: 4rem 0 2.5rem;
  background: var(--white);
  position: relative;
  overflow: hidden;
}

body.principal-page .principal-intro::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 184, 0, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

body.principal-page .principal-intro-grid {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

body.principal-page .principal-intro-photo {
  position: relative;
}

body.principal-page .principal-intro-photo::before {
  content: '';
  position: absolute;
  inset: -12px -12px 12px 12px;
  border: 2px solid var(--gold);
  border-radius: var(--ab-radius-xl, 24px);
  opacity: 0.5;
  z-index: 0;
}

body.principal-page .principal-intro-photo img {
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--ab-radius-xl, 24px);
  box-shadow: var(--shadow-lg);
}

body.principal-page .principal-intro-info .section-title {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  margin-bottom: 0.35rem;
}

body.principal-page .principal-intro-credentials {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gold-dark);
  margin-bottom: 0.5rem;
}

body.principal-page .principal-intro-role {
  display: inline-flex;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  padding: 0.4rem 1rem;
  background: rgba(255, 184, 0, 0.12);
  border-radius: 999px;
  margin-bottom: 1.15rem;
}

body.principal-page .principal-intro-lead {
  font-size: 0.96rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 1.35rem;
  max-width: 56ch;
}

body.principal-page .principal-intro-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

body.principal-page .principal-intro-tags li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.9rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--navy);
  background: var(--off-white);
  border: 1px solid var(--gray-200);
  border-radius: 999px;
}

body.principal-page .principal-intro-tags i {
  color: var(--gold-dark);
  font-size: 0.72rem;
}

body.principal-page .principal-subnav-link i {
  margin-right: 0.35rem;
  font-size: 0.75rem;
  opacity: 0.85;
}

body.principal-page .principal-subnav-link.is-active i {
  color: var(--gold);
}

body.principal-page .principal-block {
  padding: 4.5rem 0;
  scroll-margin-top: calc(var(--header-h, 72px) + 64px);
  background: var(--white);
}

body.principal-page .principal-block--alt {
  background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
}

body.principal-page .principal-block-header {
  margin-bottom: 2rem;
}

body.principal-page .principal-message-quote {
  margin: 0 0 1.75rem;
  padding: 1.65rem 1.5rem;
  border-left: 4px solid var(--gold);
  background: linear-gradient(135deg, rgba(30, 58, 95, 0.04) 0%, rgba(255, 184, 0, 0.08) 100%);
  border-radius: 0 16px 16px 0;
}

body.principal-page .principal-message-quote p {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--navy);
  line-height: 1.75;
  margin: 0;
}

body.principal-page .principal-message-body p,
body.principal-page .principal-prose p,
body.principal-page .principal-research-note {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.85;
  margin-bottom: 1rem;
}

body.principal-page .principal-message-body p:last-child,
body.principal-page .principal-prose p:last-child {
  margin-bottom: 0;
}

body.principal-page .principal-signoff {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
  color: var(--navy);
  line-height: 1.7;
  font-size: 0.95rem;
}

body.principal-page .principal-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

body.principal-page .principal-timeline::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(30, 58, 95, 0.15) 100%);
}

body.principal-page .principal-timeline-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 1.25rem;
  padding: 1.15rem 0;
}

body.principal-page .principal-timeline-marker {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--white);
  border: 2px solid rgba(255, 184, 0, 0.45);
  color: var(--gold-dark);
  font-size: 1rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 16px rgba(30, 58, 95, 0.08);
}

body.principal-page .principal-timeline-content {
  padding: 1.15rem 1.35rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(30, 58, 95, 0.06);
}

body.principal-page .principal-block--alt .principal-timeline-content {
  background: var(--white);
}

body.principal-page .principal-timeline-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 0.35rem;
}

body.principal-page .principal-timeline-meta {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gold-dark);
  margin: 0 0 0.5rem;
}

body.principal-page .principal-timeline-content p:last-child {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin: 0;
}

body.principal-page .principal-highlight-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

body.principal-page .principal-highlight-card {
  padding: 1.35rem 1.25rem;
  background: var(--off-white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

body.principal-page .principal-highlight-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(30, 58, 95, 0.08);
}

body.principal-page .principal-highlight-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 0.75rem;
  border-radius: 12px;
  background: rgba(255, 184, 0, 0.15);
  color: var(--gold-dark);
  font-size: 1rem;
}

body.principal-page .principal-highlight-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 0.5rem;
}

body.principal-page .principal-highlight-card p {
  font-size: 0.86rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin: 0;
}

body.principal-page .principal-research-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

body.principal-page .principal-research-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.35rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(30, 58, 95, 0.05);
}

body.principal-page .principal-research-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(30, 58, 95, 0.08);
  color: var(--navy);
  font-size: 1rem;
}

body.principal-page .principal-research-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
}

body.principal-page .principal-research-card p {
  font-size: 0.86rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin: 0;
}

body.principal-page .principal-research-note {
  padding: 1.25rem 1.35rem;
  background: rgba(255, 184, 0, 0.08);
  border-left: 4px solid var(--gold);
  border-radius: 0 14px 14px 0;
  margin-bottom: 0;
}

@media (max-width: 900px) {
  body.principal-page .principal-intro-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  body.principal-page .principal-intro-photo {
    max-width: 280px;
    margin: 0 auto;
  }

  body.principal-page .principal-highlight-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  body.principal-page .about-hero {
    min-height: 240px;
  }

  body.principal-page .about-hero-content h1 {
    font-size: 1.75rem;
  }

  body.principal-page .principal-intro {
    padding: 2rem 0 1.5rem;
  }

  body.principal-page .principal-intro-photo {
    max-width: 200px;
  }

  body.principal-page .principal-intro-info .section-title {
    font-size: 1.2rem;
  }

  body.principal-page .principal-intro-tags {
    flex-direction: column;
    align-items: stretch;
  }

  body.principal-page .principal-block {
    padding: 3rem 0;
  }

  body.principal-page .principal-subnav-link {
    font-size: 0.76rem;
    padding: 0.5rem 0.85rem;
  }

  body.principal-page .principal-subnav-link i {
    display: none;
  }

  body.principal-page .principal-message-quote p {
    font-size: 0.95rem;
  }

  body.principal-page .principal-timeline-item {
    grid-template-columns: 40px 1fr;
    gap: 0.85rem;
  }

  body.principal-page .principal-timeline::before {
    left: 19px;
  }

  body.principal-page .principal-timeline-marker {
    width: 40px;
    height: 40px;
    font-size: 0.85rem;
    border-radius: 12px;
  }

  body.principal-page .principal-research-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- Scroll layout (infrastructure, alumni, professional-societies) ---- */

.infrastructure-page .animate-on-scroll,
.alumni-page .animate-on-scroll,
.professional-societies-page .animate-on-scroll {
  opacity: 1;
  transform: none;
}

.principal-subnav {
  position: sticky;
  top: var(--header-h, 72px);
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: 0 4px 20px rgba(30, 58, 95, 0.06);
}

.principal-subnav-list {
  display: flex;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0.65rem 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.principal-subnav-list::-webkit-scrollbar {
  display: none;
}

.principal-subnav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-600);
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.principal-subnav-link:hover {
  color: var(--navy);
  background: var(--off-white);
}

.principal-subnav-link.is-active {
  color: var(--white);
  background: var(--navy);
  box-shadow: 0 6px 18px rgba(30, 58, 95, 0.2);
}

.infra-profile .about-principal-grid,
.alumni-profile .about-principal-grid,
.societies-profile .about-principal-grid {
  align-items: start;
}

.principal-highlights {
  padding: 0 0 4rem;
  background: var(--white);
}

.principal-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.principal-stat {
  padding: 1.35rem 1.15rem;
  text-align: center;
  background: linear-gradient(180deg, #f8fcfb 0%, var(--off-white) 100%);
  border: 1px solid rgba(30, 58, 95, 0.08);
  border-radius: 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.principal-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(30, 58, 95, 0.08);
}

.principal-stat-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 0.65rem;
  border-radius: 12px;
  background: rgba(255, 184, 0, 0.15);
  color: var(--gold-dark);
  font-size: 1rem;
}

.principal-stat strong {
  display: block;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
}

.principal-stat > span:last-child {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.76rem;
  line-height: 1.45;
  color: var(--gray-600);
}

.infra-block,
.alumni-block,
.societies-block {
  padding: 4.5rem 0;
  scroll-margin-top: calc(var(--header-h, 72px) + 64px);
}

.infra-block--alt,
.alumni-block--alt,
.societies-block--alt {
  background: var(--off-white);
}

.infra-block .section-header,
.alumni-block .section-header,
.societies-block .section-header {
  margin-bottom: 2rem;
}

@media (max-width: 900px) {
  .principal-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .principal-stats {
    grid-template-columns: 1fr;
  }

  .principal-subnav-link {
    font-size: 0.78rem;
    padding: 0.5rem 0.9rem;
  }
}