/* ── Base ── */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

/* ── Scroll Reveal ── */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Navbar ── */
#navbar {
    background: transparent;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

/* ── Mobile Menu ── */
#mobile-menu.open {
    transform: translateX(0);
}

#mobile-menu:not(.open) {
    transform: translateX(-100%);
}

/* ── Menu Button Animation ── */
#menu-btn.active #menu-line-1 {
    transform: translateY(4px) rotate(45deg);
}

#menu-btn.active #menu-line-2 {
    opacity: 0;
}

#menu-btn.active #menu-line-3 {
    transform: translateY(-4px) rotate(-45deg);
    width: 1.5rem;
}

/* ── Selection ── */
::selection {
    background: #99f6e4;
    color: #134e4a;
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f8fafc;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ── Image placeholder fallback ── */
img {
    background-color: #f1f5f9;
}