*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Hero entrance animations — above the fold, no JS required */
.hero-sub {
    animation: fadeUp 0.8s ease both;
    animation-delay: 0.2s;
}

.hero-title {
    animation: fadeUp 0.8s ease both;
    animation-delay: 0.4s;
}

.hero-desc {
    animation: fadeUp 0.8s ease both;
    animation-delay: 0.6s;
}

.hero-cta {
    animation: fadeUp 0.8s ease both;
    animation-delay: 0.8s;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll reveal — progressive enhancement, hidden by default */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }

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

/* Navbar scroll state */
.nav-scrolled #navbar {
    background: rgba(4, 47, 46, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-scrolled .nav-link {
    color: rgba(255, 255, 255, 0.7);
}

.nav-scrolled .menu-line {
    background: white;
}

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

.mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 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; }

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

/* Selection color */
::selection {
    background: rgba(13, 148, 136, 0.2);
    color: inherit;
}
</style>