/* Hero Slider */
.hero-slider {
  position: relative;
  height: 60vh;
  min-height: 400px;
  max-height: 600px;
  overflow: hidden;
  background-color: var(--primary-color);
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 1;
}

.slide.active {
  opacity: 1;
  z-index: 2;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 37, 81, 0.6); /* Navy overlay */
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide-content {
  text-align: center;
  color: var(--text-light);
  max-width: 800px;
  padding: var(--spacing-4);
}

.slide-content h2 {
  font-family: var(--font-heading);
  font-size: 3rem;
  margin-bottom: var(--spacing-3);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.slide-content p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-4);
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.slider-controls {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 var(--spacing-4);
  transform: translateY(-50%);
  z-index: 3;
}

.slider-btn {
  background: rgba(255,255,255,0.2);
  color: var(--text-light);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.slider-btn:hover {
  background: var(--accent-color);
  color: var(--primary-color);
}

.slider-dots {
  position: absolute;
  bottom: var(--spacing-4);
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: var(--spacing-2);
  z-index: 3;
}

.slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.slider-dot.active {
  background: var(--accent-color);
}

/* Sections */
.section {
  padding: var(--spacing-8) 0;
}

.section-bg-light {
  background-color: var(--surface-color);
}

/* Welcome Section */
.welcome-section {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.welcome-text {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* Courses Highlight */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-5);
  margin-top: var(--spacing-5);
}

.course-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.course-card h3 {
  color: var(--primary-color);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-2);
}

.course-card .course-desc {
  color: var(--text-muted);
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
}

/* Why Choose Us */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-5);
  text-align: center;
}

.feature-item {
  padding: var(--spacing-4);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background-color: var(--primary-color);
  color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto var(--spacing-3);
  font-weight: bold;
}

/* Principal Preview */
.principal-preview {
  display: flex;
  gap: var(--spacing-6);
  align-items: center;
  background-color: var(--surface-color);
  padding: var(--spacing-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.principal-img {
  width: 200px;
  height: 250px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  background-color: #eee;
}

.principal-content h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-1);
}

.principal-title {
  color: var(--text-muted);
  margin-bottom: var(--spacing-3);
  font-weight: 500;
}

/* Gallery Preview */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-3);
}

.gallery-item {
  height: 200px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #eee;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* CTA Banner */
.cta-banner {
  background-color: var(--secondary-color);
  color: var(--text-light);
  text-align: center;
  padding: var(--spacing-6) 0;
}

.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-3);
  color: var(--accent-color);
}

/* Responsive */
@media (max-width: 768px) {
  .slide-content h2 { font-size: 2rem; }
  .principal-preview { flex-direction: column; text-align: center; }
}