/* ── Base & Utilities ── */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #040B18; }
::-webkit-scrollbar-thumb { background: #152E55; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2F855A; }

/* ── Nav active state ── */
nav.scrolled {
    background: rgba(4, 11, 24, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* ── Mobile menu transitions ── */
.mobile-link { transition: opacity 0.3s ease, transform 0.3s ease; }
#mobile-menu.open { opacity: 1; pointer-events: all; }
#mobile-menu.closed { opacity: 0; pointer-events: none; }

/* ── Select styling ── */
select option {
    background: #0A1628;
    color: #fff;
}

/* ── Focus visible ── */
:focus-visible {
    outline: 2px solid #68D391;
    outline-offset: 2px;
}