.timeline-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.navbar-sticky {
  position: sticky;
  top: 0;
  background-color: white;
  z-index: 50;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
}

.scrollbar-hide::-webkit-scrollbar {
  display: none;
}

.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.carousel-container {
    perspective: 1000px;
    touch-action: pan-y pinch-zoom;
}

.carousel-track {
    transform-style: preserve-3d;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.carousel-item {
    backface-visibility: hidden;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.carousel-item.active {
    opacity: 1;
    transform: scale(1) translateZ(0);
}

@media (max-width: 640px) {
    .carousel-item.prev {
        opacity: 0;
        transform: scale(0.8) translateX(-50%) translateZ(-100px);
    }

    .carousel-item.next {
        opacity: 0;
        transform: scale(0.8) translateX(50%) translateZ(-100px);
    }
}

@media (min-width: 641px) {
    .carousel-item.prev {
        opacity: 0.7;
        transform: scale(0.9) translateX(-100%) translateZ(-100px);
    }

    .carousel-item.next {
        opacity: 0.7;
        transform: scale(0.9) translateX(100%) translateZ(-100px);
    }
}

.carousel-item.hidden {
    opacity: 0;
    transform: scale(0.8) translateZ(-200px);
}

.nav-button {
    transition: all 0.3s;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

@media (hover: hover) {
    .nav-button:hover {
        background: rgba(255, 255, 255, 0.2);
        transform: scale(1.1);
    }
}

.nav-button:active {
    transform: scale(0.95);
}

.progress-bar {
    transition: width 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}