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

/* ── Navbar ── */
#navbar {
    background: transparent;
    transition: background 0.35s ease, box-shadow 0.35s ease, padding 0.35s ease;
}
#navbar.scrolled {
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 20px rgba(0,0,0,0.25);
}

/* ── Hero ── */
.hero-bg { will-change: transform; }
.hero-content {
    animation: heroFadeIn 1s ease-out both;
}
.hero-scroll-indicator {
    animation: heroFadeIn 1s ease-out 0.6s both;
}
@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Scroll Dot ── */
.scroll-dot {
    animation: scrollBounce 1.8s ease-in-out infinite;
}
@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50%      { transform: translateY(8px); opacity: 0.4; }
}

/* ── Reveal on Scroll ── */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Hidden by default for progressive enhancement — JS adds .revealed */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Mobile Menu ── */
#mobile-menu {
    animation: menuSlideDown 0.3s ease-out both;
}
@keyframes menuSlideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.mobile-link {
    transition: color 0.2s ease, padding-left 0.2s ease;
}
.mobile-link:hover {
    color: #5eead4;
    padding-left: 0.5rem;
}

/* ── Menu Card Image Hover ── */
.group:hover .group-hover\:scale-110 {
    transform: scale(1.1);
}

/* ── Button Hover Scale ── */
button, a {
    display: inline-block;
}

/* ── Smooth Scroll Offset for Fixed Nav ── */
section[id] {
    scroll-margin-top: 80px;
}

/* ── Selection Color ── */
::selection {
    background: rgba(20, 184, 166, 0.3);
    color: #0f172a;
}

/* ── Focus Styles ── */
a:focus-visible, button:focus-visible {
    outline: 2px solid #14b8a6;
    outline-offset: 3px;
    border-radius: 4px;
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}