/* ── 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;
}

img {
    display: block;
    max-width: 100%;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
}

/* ── Hero Animations ── */
@media (prefers-reduced-motion: no-preference) {
    .hero-subtitle {
        animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
    }

    .hero-title {
        animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.4s both;
    }

    .hero-body {
        animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.6s both;
    }

    .hero-cta {
        animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.8s both;
    }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

#navbar.scrolled #nav-brand,
#navbar.scrolled .nav-link {
    color: #1e293b;
}

#navbar.scrolled .nav-link {
    color: #475569;
}

#navbar.scrolled .nav-link:hover {
    color: #0f766e;
}

/* ── Mobile Menu ── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

/* ── Selection ── */
::selection {
    background: #ccfbf1;
    color: #134e4a;
}

/* ── Form Focus ── */
input:focus,
textarea:focus {
    outline: none;
}

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