html { scroll-behavior: smooth; }
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), transform 1s cubic-bezier(0.4, 0, 0.2, 1); }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.hero-overlay { background: linear-gradient(to right, rgba(17, 17, 17, 0.95) 0%, rgba(17, 17, 17, 0.4) 100%); }
.btn-solid { display: inline-block; padding: 1.25rem 3rem; text-transform: uppercase; letter-spacing: 0.2em; font-weight: 700; transition: all 0.3s ease; border: 1px solid transparent; }
.nav-scrolled { background-color: rgba(255, 255, 255, 0.98); box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1); padding-top: 1rem !important; padding-bottom: 1rem !important; }
.whatsapp-float { position: fixed; bottom: 2rem; right: 2rem; background-color: #25D366; color: white; width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; z-index: 100; transition: transform 0.3s ease; border-radius: 2px; }
.whatsapp-float:hover { transform: translateY(-5px); }
.service-card { transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1); }
.service-card:hover { transform: translateY(-5px); }