:root {
  --color-primary: #1a3a5d;
  --color-primary-dark: #102a43;
  --color-secondary: #c5a47e;
  --color-secondary-light: #e0c9a6;
  --color-background: #f9f9f9;
  --color-surface: #ffffff;
  --color-text-primary: #212529;
  --color-text-secondary: #5a6169;
  --color-border: #e3e6e9;

  --font-body: 'Montserrat', sans-serif;
  --font-heading: 'Playfair Display', serif;

  --spacing-xs: 0.5rem;   /* 8px */
  --spacing-sm: 1rem;     /* 16px */
  --spacing-md: 1.5rem;   /* 24px */
  --spacing-lg: 2.5rem;   /* 40px */
  --spacing-xl: 4rem;     /* 64px */

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-strong: 0 12px 36px rgba(0, 0, 0, 0.1);

  --transition-cubic: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--color-secondary);
  color: var(--color-surface);
}

.content-container {
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 70px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-secondary), transparent);
    margin: 0.75rem auto 0;
    opacity: 0.8;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 65vh;
  min-height: 450px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-surface);
  background: url('../images/hero-background.jpg') no-repeat center center/cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 58, 93, 0.8), rgba(26, 58, 93, 0.5));
}

.hero-content {
  position: relative;
  animation: fadeIn-Up 1s ease-out forwards;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 4.5rem);
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  letter-spacing: 1px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 400;
  margin-top: var(--spacing-xs);
  text-shadow: 0 1px 5px rgba(0,0,0,0.2);
  opacity: 0.9;
}

/* --- Intro Section --- */
.intro-section {
    text-align: center;
    font-size: 1.15rem;
    max-width: 800px;
    color: var(--color-text-secondary);
}

/* --- Timeline Section --- */
.timeline-section {
    background-color: var(--color-surface);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 3px;
  background-color: var(--color-border);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1.5px;
}

.timeline-item {
  padding: var(--spacing-sm) var(--spacing-lg);
  position: relative;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background-color: var(--color-background);
  border: 4px solid var(--color-secondary);
  top: 2rem;
  border-radius: 50%;
  z-index: 1;
  transition: transform 0.2s ease-out;
}

.timeline-item:hover::after {
  transform: scale(1.2);
}

.timeline-item:nth-child(odd)::after { right: -9px; }
.timeline-item:nth-child(even)::after { left: -9px; }

.timeline-year {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--color-secondary);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.timeline-content {
  padding: var(--spacing-md);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  transition: var(--transition-cubic);
  border: 1px solid var(--color-border);
}

.timeline-item:hover .timeline-content {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-secondary-light);
}

.timeline-content h3 {
    margin-top: 0;
    color: var(--color-primary);
    font-size: 1.25rem;
}

.timeline-content p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* --- Key Figures Section --- */
.figures-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.figure-card {
  text-align: center;
  background: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  transition: var(--transition-cubic);
}

.figure-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-strong);
}

.figure-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: var(--spacing-md);
  border: 6px solid var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-border), var(--shadow-medium);
}

.figure-name {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-primary);
}

.figure-title {
  color: var(--color-secondary);
  font-weight: 700;
  margin-top: 0.25rem;
  font-size: 1rem;
}

.figure-bio {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
}

/* --- Stats Section --- */
.stats-section {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-surface);
  text-align: center;
}

.stats-section .content-container {
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.stat-item i {
  font-size: 3.5rem;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
  transition: transform 0.3s ease;
}
.stat-item:hover i {
    transform: scale(1.1);
}

.stat-number {
  display: block;
  font-size: 2.8rem;
  font-weight: 700;
}
.stat-item p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* --- Departments Section (Accordion) --- */
.accordion {
  max-width: 850px;
  margin: 0 auto;
}

.accordion-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-cubic);
}
.accordion-item:hover {
    box-shadow: var(--shadow-medium);
    border-color: var(--color-secondary-light);
}
.accordion-item.active {
    border-color: var(--color-secondary);
}

.accordion-header {
  width: 100%;
  background-color: var(--color-surface);
  border: none;
  padding: 1.25rem var(--spacing-md);
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.3s;
}

.accordion-header:hover {
    background-color: #fafcff;
}

.accordion-header i {
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  color: var(--color-secondary);
  font-size: 1.4rem;
}

.accordion-item.active .accordion-header i {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-in-out, padding 0.4s ease-in-out;
  padding: 0 var(--spacing-md);
  color: var(--color-text-secondary);
}

.accordion-content p {
    margin: 0;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
}

/* --- Gallery Section --- */
.gallery-section {
    background-color: var(--color-surface);
}

.gallery-container {
  position: relative;
  max-width: 1200px;
  margin: auto;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-medium);
}

.gallery-slider {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.gallery-slider img {
  width: 100%;
  flex-shrink: 0;
  display: block;
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: rgba(255, 255, 255, 0.8);
  color: var(--color-primary);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 2;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  opacity: 0.7;
}

.gallery-nav:hover {
  background-color: var(--color-surface);
  color: var(--color-secondary);
  transform: translateY(-50%) scale(1.1);
  opacity: 1;
}

.gallery-nav.prev { left: var(--spacing-sm); }
.gallery-nav.next { right: var(--spacing-sm); }

/* --- Animations --- */
[data-animate] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeIn-Up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
  .timeline::after { left: 30px; }
  .timeline-item { width: 100%; padding-left: 70px; padding-right: var(--spacing-sm); text-align: left !important; }
  .timeline-item:nth-child(even) { left: 0; }
  .timeline-item::after { left: 21px; }
  .timeline-item:nth-child(odd)::after,
  .timeline-item:nth-child(even)::after { left: 21px; }

  .hero { height: 50vh; }

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

@media (max-width: 480px) {
  body { line-height: 1.6; }

  .content-container { padding: var(--spacing-lg) var(--spacing-sm); }

  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1rem; }
  
  .timeline::after { left: 20px; }
  .timeline-item { padding-left: 50px; }
  .timeline-item::after { left: 11px; }
  .timeline-item:nth-child(odd)::after,
  .timeline-item:nth-child(even)::after { left: 11px; }
  
  .stats-grid, .figures-grid { grid-template-columns: 1fr; }
  .stats-grid { gap: var(--spacing-md); }
  
  .gallery-nav { width: 44px; height: 44px; font-size: 1.2rem; }
}