/* ── Base & Reset ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; -webkit-font-smoothing: antialiased; }

/* ── Navbar ── */
#navbar {
    background: transparent;
    transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}
#navbar.scrolled {
    background: rgba(8, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

.nav-link {
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #2dd4bf;
    transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

/* ── Mobile Menu ── */
.menu-line { display: block; }
body.menu-open .menu-line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu-open .menu-line:nth-child(2) { opacity: 0; }
body.menu-open .menu-line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); width: 5px; }
#mobileMenu.open { opacity: 1; pointer-events: all; }
.mobile-link { transition: opacity 0.3s ease, transform 0.3s ease; }

/* ── Floating Animations ── */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}
@keyframes float-delayed {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}
@keyframes float-delayed-2 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}
.animate-float { animation: float 4s ease-in-out infinite; }
.animate-float-delayed { animation: float-delayed 5s ease-in-out infinite 0.5s; }
.animate-float-delayed-2 { animation: float-delayed-2 4.5s ease-in-out infinite 1s; }

/* ── 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, #2dd4bf, transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}
.service-card:hover::before { opacity: 1; }

/* ── Gallery ── */
.gallery-item {
    cursor: pointer;
}
.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(8, 14, 26, 0);
    transition: background 0.3s ease;
    border-radius: inherit;
}
.gallery-item:hover::after {
    background: rgba(8, 14, 26, 0.2);
}
.gallery-item { position: relative; }

/* ── Scroll Reveal ── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.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; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ── Selection ── */
::selection {
    background: rgba(45, 212, 191, 0.3);
    color: #f0fdfa;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0f172a; }
::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #334155; }

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