/* ─── BASE ─── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }

/* ─── HEADER SCROLL STATE ─── */
#site-header {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}
#site-header.scrolled {
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

/* ─── MOBILE MENU ─── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}
#mobile-menu.open .mobile-link {
    animation: fadeUp 0.4s ease forwards;
    opacity: 0;
}
#mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }

.menu-line:nth-child(3) {
    width: 1.4rem;
}

/* ─── FLOATING CARDS ─── */
.floating-card {
    animation: float 6s ease-in-out infinite;
}
.card-1 { animation-delay: 0s; }
.card-2 { animation-delay: -2s; }
.card-3 { animation-delay: -4s; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

/* ─── REVEAL ANIMATIONS ─── */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Default state: visible (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal[data-reveal] {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal[data-reveal].revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── PRODUCT CARDS ─── */
.card-product {
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.card-product:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(94, 234, 212, 0.08);
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0a1628; }
::-webkit-scrollbar-thumb { background: #1a3568; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #284a8a; }

/* ─── SELECTION ─── */
::selection { background: rgba(94, 234, 212, 0.3); color: #f0f3f9; }

/* ─── FOCUS ─── */
:focus-visible {
    outline: 2px solid #5eead4;
    outline-offset: 2px;
}

/* ─── MOBILE MENU ANIMATION ─── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── MOBILE MENU LINKS ─── */
.mobile-link {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}