/* Base & Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

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

::-webkit-scrollbar-track {
    background: #0f172a;
}

::-webkit-scrollbar-thumb {
    background: #1a2744;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #d4af37;
}

/* Selection */
::selection {
    background: rgba(212, 175, 55, 0.3);
    color: #f1f5f9;
}

/* Header transitions */
#main-header.scrolled {
    background: rgba(7, 13, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Mobile menu animations */
.mobile-link {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

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

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }

/* Hamburger animation */
.menu-line {
    display: block;
    transition: all 0.3s ease;
}

#mobile-menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

#mobile-menu-btn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    width: 1.25rem;
}

/* Service cards */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #d4af37, transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.service-card:hover::before {
    opacity: 1;
}

/* Gallery hover overlay */
.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(7, 13, 26, 0.6), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.gallery-item:hover::after {
    opacity: 1;
}

/* Decorative divider */
.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 0 auto;
}

.section-divider span {
    display: block;
    height: 1px;
    width: 48px;
    background: linear-gradient(90deg, transparent, #d4af37, transparent);
}

/* Input focus styles */
input:focus,
select:focus,
textarea:focus {
    outline: none;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .gallery-item img {
        transition: none;
    }

    .gallery-item:hover img {
        transform: none;
    }
}

/* Scroll reveal (progressive enhancement - JS adds classes) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile responsive */
@media (max-width: 768px) {
    .font-serif {
        line-height: 1.15;
    }

    #hero h1 {
        font-size: 2.75rem;
    }

    .service-card {
        padding: 1.5rem;
    }
}