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

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

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(16, 185, 129, 0.15);
    color: #0a1628;
}

/* ── Scroll Indicator Animation ── */
@keyframes scrollIndicator {
    0% { transform: translateY(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(100%); opacity: 0; }
}

.animate-scroll-indicator {
    animation: scrollIndicator 1.8s ease-in-out infinite;
}

/* ── Navigation ── */
#nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(10, 22, 40, 0.06);
}

#nav.scrolled {
    box-shadow: 0 1px 0 rgba(10, 22, 40, 0.06);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 1px;
    background: #10b981;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

/* ── Mobile Menu ── */
.menu-line {
    display: block;
}

#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

#mobile-menu.open .menu-line:first-child {
    transform: rotate(45deg) translate(3px, 3px);
}

#mobile-menu.open .menu-line:last-child {
    transform: rotate(-45deg) translate(3px, -3px);
}

/* ── Reveal Animations (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }

    .reveal-left {
        opacity: 1;
        transform: translateX(0);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }

    .reveal-right {
        opacity: 1;
        transform: translateX(0);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }
}

/* ── Scroll Reveal (JS-enhanced, hidden by default for below-fold) ── */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 0;
    transform: translateY(30px);
}

.reveal-left {
    transform: translateX(-30px);
}

.reveal-right {
    transform: translateX(30px);
}

.reveal-up.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible {
    opacity: 1;
    transform: translateY(0) translateX(0);
}

/* ── Image Hover ── */
.group:hover .group-hover\:scale-105 {
    transform: scale(1.05);
}

/* ── Smooth focus outlines ── */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #10b981;
    outline-offset: 4px;
    border-radius: 4px;
}

/* ── Responsive tweaks ── */
@media (max-width: 640px) {
    .font-serif {
        line-height: 1.15;
    }
}