/* ── Base ── */
html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

/* ── Nav ── */
#navbar {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}
#navbar.scrolled {
    background: rgba(254, 253, 248, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(16, 185, 129, 0.08);
}

/* ── Mobile menu ── */
#mobile-menu.show { display: block; animation: fadeDown 0.25s ease; }
@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.menu-line:last-child { transition: width 0.3s ease, transform 0.3s ease; }
#menu-btn.active .menu-line:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
#menu-btn.active .menu-line:nth-child(2) { opacity: 0; }
#menu-btn.active .menu-line:nth-child(3) { width: 1.5rem; transform: rotate(-45deg) translate(4px, -4px); }

/* ── Floating cards ── */
.floating-card {
    animation: floatA 3.5s ease-in-out infinite;
}
.floating-card-delayed {
    animation: floatB 4s ease-in-out infinite;
    animation-delay: 0.8s;
}
@keyframes floatA {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}
@keyframes floatB {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-14px); }
}

/* ── Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f0fdf4; }
::-webkit-scrollbar-thumb { background: #a7f3d0; border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: #6ee7b7; }