/* === BASE === */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; }
button { cursor: pointer; border: none; background: none; }

/* === NAVBAR === */
#navbar { transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease; }
#navbar.scrolled {
    background: rgba(6, 18, 43, 0.95);
    backdrop-filter: blur(16px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}
.nav-link { position: relative; }
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #E8A838;
    transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

/* === MOBILE MENU === */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
.mobile-link {
    display: block;
}

/* === SERVICE CARDS === */
.service-card {
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: #E8A838;
    transition: height 0.4s ease;
}
.service-card:hover::before { height: 100%; }

/* === GALLERY === */
.gallery-item {
    cursor: pointer;
}
.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    border: 2px solid transparent;
    transition: border-color 0.3s ease;
    pointer-events: none;
}
.gallery-item:hover::after { border-color: rgba(232, 168, 56, 0.4); }

/* === SCROLL ANIMATIONS === */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.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; }

/* === BACK TO TOP === */
#back-to-top {
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}
#back-to-top.show {
    opacity: 1;
    pointer-events: auto;
}
#back-to-top:hover {
    transform: translateY(-2px);
}

/* === SELECTION === */
::selection { background: rgba(232, 168, 56, 0.3); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .font-heading { font-size: inherit; }
}