*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

/* Scroll reveal — progressive enhancement, only active when JS runs & motion preferred */
.scroll-reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal.is-revealing {
        opacity: 0;
        transform: translateY(30px);
    }
    .scroll-reveal.is-visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Floating particles */
.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, #7ED1AA 0%, transparent 70%);
    border-radius: 50%;
    animation: float-particle var(--duration, 3s) ease-in-out infinite;
    animation-delay: var(--delay, 0s);
    opacity: 0;
}

@keyframes float-particle {
    0%, 100% {
        opacity: 0;
        transform: translateY(0) scale(0.5);
    }
    50% {
        opacity: 0.8;
        transform: translateY(-40px) scale(1);
    }
}

/* Navbar scroll state */
.navbar-scrolled {
    background: rgba(10, 22, 40, 0.95) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.3);
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0A1628;
}
::-webkit-scrollbar-thumb {
    background: #2E9B6E;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #4DB888;
}

/* Selection */
::selection {
    background: rgba(77, 184, 136, 0.3);
    color: #0A1628;
}