/* ── Base & Utilities ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; }

::selection { background: rgba(212, 160, 23, 0.3); color: #fff; }

/* ── Custom Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0f172a; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

/* ── Animations ── */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}
@keyframes float-delayed {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}
.animate-float { animation: float 6s ease-in-out infinite; }
.animate-float-delayed { animation: float-delayed 5s ease-in-out infinite; animation-delay: 1.5s; }

/* ── Reveal on Scroll ── */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    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; }

/* ── Nav Scrolled State ── */
nav.scrolled {
    background: rgba(2, 6, 23, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* ── Mobile Menu ── */
.mobile-menu-open { overflow: hidden; }
#mobile-menu.open { opacity: 1; pointer-events: all; }

/* ── Gradient Text Utility ── */
.text-gradient-gold {
    background: linear-gradient(135deg, #d4a017, #c9a227);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Select Arrow ── */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* ── Responsive Tweaks ── */
@media (max-width: 640px) {
    .font-display { font-size: clamp(2rem, 8vw, 3rem); }
}