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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

/* Scroll reveal styles — progressive enhancement, hidden by default via JS */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        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.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
    .reveal:nth-child(4) { transition-delay: 0.3s; }
}

/* Fallback: always visible if JS is disabled */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Navbar scroll state */
.nav-scrolled {
    background: rgba(10, 25, 41, 0.95) !important;
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

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

::-webkit-scrollbar-track {
    background: #f0fdf4;
}

::-webkit-scrollbar-thumb {
    background: #6dd5b5;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #48b896;
}

/* Selection color */
::selection {
    background: #6dd5b5;
    color: #102a43;
}

/* Image lazy load placeholder */
img {
    background: linear-gradient(135deg, #e6faf4 0%, #d9e2ec 100%);
}

/* Focus styles */
a:focus-visible, button:focus-visible {
    outline: 2px solid #6dd5b5;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Smooth transitions for all interactive elements */
a, button {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Mobile menu animation */
#mobile-menu {
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Gradient text utility */
.gradient-text {
    background: linear-gradient(135deg, #6dd5b5 0%, #48b896 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Subtle pattern backgrounds */
.pattern-dots {
    background-image: radial-gradient(circle, rgba(109, 213, 181, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Card hover lift */
.card-lift {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-lift:hover {
    transform: translateY(-4px);
}