/* ── Base & Utilities ── */
html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    .reveal-left {
        opacity: 0;
        transform: translateX(-40px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .reveal-left.revealed {
        opacity: 1;
        transform: translateX(0);
    }

    .reveal-right {
        opacity: 0;
        transform: translateX(40px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .reveal-right.revealed {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ── Hero Animations ── */
@media (prefers-reduced-motion: no-preference) {
    .hero-line {
        display: inline-block;
        transform: translateY(105%);
        animation: slideUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    }

    .hero-line:nth-child(1) { animation-delay: 0.1s; }
    .hero-line:nth-child(2) { animation-delay: 0.25s; }
    .hero-line:nth-child(3) { animation-delay: 0.4s; }

    .hero-subtitle {
        opacity: 0;
        animation: fadeIn 0.7s ease forwards 0.6s;
    }

    .hero-desc {
        opacity: 0;
        animation: fadeIn 0.7s ease forwards 0.8s;
    }

    .hero-cta {
        opacity: 0;
        animation: fadeIn 0.7s ease forwards 1s;
    }
}

@keyframes slideUp {
    to {
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* ── Navbar ── */
#navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: #5eead4;
    transition: width 0.3s ease;
}

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

/* ── Mobile Menu ── */
.mobile-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

#mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

/* ── Image hover parallax ── */
.rounded-2xl.overflow-hidden {
    will-change: transform;
}

/* ── Selection ── */
::selection {
    background: #0D7377;
    color: #fff;
}

/* ── Focus visible ── */
:focus-visible {
    outline: 2px solid #0D7377;
    outline-offset: 2px;
}

/* ── Smooth image loading ── */
img {
    image-rendering: -webkit-optimize-contrast;
}