/* ─── 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 { min-height: 100vh; }
img, video { max-width: 100%; height: auto; display: block; }

/* ─── HERO BACKGROUND ─── */
.hero-bg {
    background-image: url('https://images.pexels.com/photos/135620/pexels-photo-135620.jpeg?auto=compress&cs=tinysrgb&fit=crop&w=1920&h=1200');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* ─── NAV SCROLL STATE ─── */
#site-header.scrolled {
    background: rgba(9, 21, 36, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

/* ─── REVEAL ANIMATIONS (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 0;
        transform: translateY(28px);
        transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal-up.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal-left {
        opacity: 0;
        transform: translateX(-32px);
        transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal-left.revealed {
        opacity: 1;
        transform: translateX(0);
    }

    .reveal-right {
        opacity: 0;
        transform: translateX(32px);
        transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal-right.revealed {
        opacity: 1;
        transform: translateX(0);
    }

    /* Hero entrance animations */
    .hero-eyebrow {
        opacity: 0;
        animation: fadeUp 0.9s 0.3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-title {
        opacity: 0;
        animation: fadeUp 1s 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-sub {
        opacity: 0;
        animation: fadeUp 1s 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-cta {
        opacity: 0;
        animation: fadeUp 1s 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-scroll {
        opacity: 0;
        animation: fadeUp 1s 1.3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-scroll-line {
        animation: scrollLine 2s 1.8s ease-out forwards;
    }

    @keyframes fadeUp {
        from { opacity: 0; transform: translateY(24px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes scrollLine {
        from { opacity: 0; height: 0; }
        to   { opacity: 1; height: 48px; }
    }
}

/* ─── MOBILE MENU ─── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: auto;
}

/* ─── FOCUS VISIBLE ─── */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid #5ec49e;
    outline-offset: 2px;
    border-radius: 2px;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f0f4f8; }
::-webkit-scrollbar-thumb { background: #b8cce0; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #8faecf; }

/* ─── SELECTION ─── */
::selection { background: rgba(94, 196, 158, 0.2); color: #0f2236; }