html {
    scroll-behavior: smooth;
}

.reveal-on-scroll {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
    transition: opacity 0.65s ease, transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: transform, opacity;
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: none;
}

.interactive-card {
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    transform-style: preserve-3d;
}

.interactive-card:hover {
    box-shadow: 0 14px 30px rgba(2, 6, 23, 0.12);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    height: 3px;
    width: 0;
    background: linear-gradient(90deg, #2e7d32, #004a99);
    transition: width 0.08s linear;
}

.back-to-top {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 9999;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 9999px;
    background: #004a99;
    color: #ffffff;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0, 74, 153, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #2e7d32;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .reveal-on-scroll,
    .reveal-on-scroll.is-visible,
    .interactive-card,
    .back-to-top,
    .scroll-progress {
        transition: none !important;
        transform: none !important;
    }
}