/* Header entrance and scroll state */
.site-header {
    animation: header-slide-down 0.4s ease forwards;
}

.site-header.is-scrolled {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
    border-bottom-color: var(--border-strong);
}

@keyframes header-slide-down {
    from {
        transform: translateY(-100%);
    }
    to {
        transform: translateY(0);
    }
}

/* Nav link underline */
.site-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: var(--link-color);
    transition: width 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
    width: 100%;
}

/* Card hover lift */
.hover-lift,
.specialty-card,
.bento-card,
.treatment-card,
.process-step {
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color var(--transition);
}

.specialty-card:hover,
.bento-card:hover,
.treatment-card:hover,
.process-step:hover,
.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
    border-color: var(--border-strong);
}

.specialty-card:hover {
    border-color: var(--accent);
}

.bento-card:hover {
    border-color: var(--accent);
}

/* Button micro-interactions */
.btn {
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.2s ease;
}

.btn:hover {
    transform: scale(1.02);
}

.btn:active {
    transform: scale(0.98);
}

/* Social icon hover scale */
.social-link:hover,
.social-link:focus-visible {
    transform: scale(1.08);
    box-shadow: var(--shadow-sm);
}

/* FAQ smooth content reveal */
.faq-item {
    transition: border-color var(--transition);
}

.faq-item > p,
.faq-item > div {
    animation: faq-fade-in 0.3s ease;
}

@keyframes faq-fade-in {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* WhatsApp pulse */
.whatsapp-float {
    animation: whatsapp-pulse 2.5s ease-in-out infinite;
}

.whatsapp-float:hover {
    animation: none;
    transform: scale(1.08);
}

@keyframes whatsapp-pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.45);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(37, 211, 102, 0);
    }
}

/* Reveal animations (enhanced) */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Reduced motion — disable or simplify all animations */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .site-header {
        animation: none;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .marquee-track {
        animation: none;
    }

    .btn:hover,
    .btn:active {
        transform: none;
    }

    .specialty-card:hover,
    .bento-card:hover,
    .treatment-card:hover,
    .process-step:hover,
    .hover-lift:hover,
    .social-link:hover,
    .social-link:focus-visible,
    .whatsapp-float:hover {
        transform: none;
    }

    .whatsapp-float {
        animation: none;
    }

    .site-nav a::after {
        transition: none;
    }

    .faq-item > p,
    .faq-item > div {
        animation: none;
    }
}