/* 28 October 2026 — consistent ALPHA CARVIONEX primary call-to-action color.
 * Preserve white/outlined actions against image heroes, secondary outlined
 * service buttons, and green WhatsApp-specific submissions. */
:root{--ac-primary-action:#4b2b1c;--ac-primary-action-hover:#633d2b}
.nav .nav-cta,
.page-top .nav .nav-cta,
.site-header .nav .nav-cta,
a.btn:not(.btn-white):not(.btn-outline),
button.btn:not(.brief-whatsapp-button):not(.home-whatsapp-submit):not(.wa-primary-action){
 background:#4b2b1c!important;
 background-image:none!important;
 border-color:#4b2b1c!important;
 color:#fff!important;
}
.nav .nav-cta:hover,
.page-top .nav .nav-cta:hover,
.site-header .nav .nav-cta:hover,
a.btn:not(.btn-white):not(.btn-outline):hover,
button.btn:not(.brief-whatsapp-button):not(.home-whatsapp-submit):not(.wa-primary-action):hover{
 background:#633d2b!important;
 border-color:#633d2b!important;
 color:#fff!important;
}
.nav .nav-cta .arrow-icon,
a.btn:not(.btn-white):not(.btn-outline) .arrow-icon,
button.btn:not(.brief-whatsapp-button):not(.home-whatsapp-submit):not(.wa-primary-action) .arrow-icon{
 filter:brightness(0) invert(1);
}
/* Gallery selection remains visibly active in the brand's dark brown. */
#projects .pills button[aria-pressed="true"],
#projects .pills button:hover{
 background:#4b2b1c!important;
 border-color:#4b2b1c!important;
 color:#fff!important;
}
/* These buttons send visitors to WhatsApp; keep familiar WhatsApp green. */
.brief-dock .brief-whatsapp-button,
.contact-section .home-whatsapp-submit,
#pageEnquiryForm button[type="submit"]{
 background:#1e7546!important;
 border-color:#1e7546!important;
 color:#fff!important;
}
.brief-dock .brief-whatsapp-button:hover,
.contact-section .home-whatsapp-submit:hover,
#pageEnquiryForm button[type="submit"]:hover{
 background:#176339!important;
 border-color:#176339!important;
 color:#fff!important;
}
/* Keep image-hero white/transparent buttons and card secondary actions as-is. */