/* Custom styles — progressive enhancement, content visible without JS */

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Base styles */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scroll reveal — default state is VISIBLE (progressive enhancement) */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* When JS is enabled and prefers-reduced-motion allows, we can add entrance effects */
@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    /* Initial state for reveal elements — only applied via JS */
    .js-enabled .scroll-reveal:not(.revealed) {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navbar transition */
#navbar {
    transition: background-color 0.4s ease, backdrop-filter 0.4s ease, padding 0.3s ease;
}

#navbar.scrolled {
    background-color: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* Mobile menu */
#mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Floating card animations */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #020c1b;
}

::-webkit-scrollbar-thumb {
    background: #112240;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1a3a5e;
}

/* Selection color */
::selection {
    background-color: rgba(20, 184, 166, 0.3);
    color: #f0fdfa;
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #5eead4;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Image placeholder fallbacks */
img {
    background: linear-gradient(135deg, #112240 0%, #1a3a5e 100%);
}

/* Subtle pattern overlay for sections */
.section-pattern {
    background-image: radial-gradient(circle at 1px 1px, rgba(94, 234, 212, 0.03) 1px, transparent 0);
    background-size: 40px 40px;
}