/* ===== RESET & BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(212, 168, 67, 0.3);
    color: #f1f5f9;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #020617;
}

::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* ===== NAVBAR ===== */
#navbar {
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    background: transparent;
    transition: background 0.5s ease, backdrop-filter 0.5s ease, box-shadow 0.5s ease;
}

#navbar.scrolled {
    background: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(148, 163, 184, 0.05);
}

/* ===== MOBILE MENU ===== */
#mobileMenu.open {
    opacity: 1;
    pointer-events: all;
}

#mobileMenu .mobile-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobileMenu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobileMenu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

/* ===== HAMBURGER ===== */
.menu-line {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

#menuBtn.active .menu-line:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
}

#menuBtn.active .menu-line:nth-child(2) {
    opacity: 0;
}

#menuBtn.active .menu-line:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
    width: 1.25rem;
}

/* ===== SERVICE CARDS ===== */
.service-card {
    transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.5);
}

/* ===== TESTIMONIAL CARDS ===== */
.testimonial-card {
    transition: transform 0.4s ease, border-color 0.4s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
}

/* ===== FORM INPUTS ===== */
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: rgba(212, 168, 67, 0.5) !important;
    box-shadow: 0 0 0 1px rgba(212, 168, 67, 0.1);
}

/* ===== BACK TO TOP ===== */
#backToTop.visible {
    opacity: 1;
    pointer-events: all;
}

#backToTop:not(.visible) {
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#backToTop.visible {
    transform: translateY(0);
}

/* ===== PROGRESSIVE ENHANCEMENT: Scroll Reveal ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }

    .reveal.revealed {
        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; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .font-serif {
        line-height: 1.1;
    }
}