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

body {
    overflow-x: hidden;
}

::selection {
    background: #5EEAD4;
    color: #0A2540;
}

/* Scroll reveal base — content is visible by default, JS adds animated state */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
    opacity: 0;
    transform: translateY(32px);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
    }

    .reveal.revealed {
        opacity: 1;
        transform: none;
    }

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

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

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(10, 37, 64, 0.06);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #5EEAD4;
    transition: width 0.3s ease;
}

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

#navbar.scrolled .nav-link {
    color: rgba(10, 37, 64, 0.7);
}

#navbar.scrolled .nav-link:hover {
    color: #0A2540;
}

/* Mobile menu */
#mobile-menu.open {
    transform: translateX(0);
}

#mobile-menu .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

#mobile-menu .menu-line:nth-child(2) {
    opacity: 0;
}

#mobile-menu .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 5px;
}

/* Subtle patterns */
.section-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(10, 37, 64, 0.1), transparent);
}

/* Button micro-interactions */
a, button {
    -webkit-tap-highlight-color: transparent;
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #F0FFF8;
}

::-webkit-scrollbar-thumb {
    background: #5EEAD4;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #10B981;
}