/* Base & Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

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

body {
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: #98FFFB;
    color: #0A192F;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #F8F9FA;
}
::-webkit-scrollbar-thumb {
    background: #0A192F/20;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #0A192F/40;
}

/* Hero animations - only for below-fold content, hero is visible by default */
.hero-anim {
    opacity: 1;
    transform: translateY(0);
}

/* Reveal animations - only for below-fold, progressive enhancement */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    /* Stagger children */
    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
    .reveal:nth-child(4) { transition-delay: 0.3s; }
}

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

#mobile-menu:not(.open) {
    opacity: 0;
    pointer-events: none;
}

/* Hamburger animation */
#menu-toggle.active #line1 {
    transform: rotate(45deg) translate(4px, 4px);
}
#menu-toggle.active #line2 {
    opacity: 0;
}
#menu-toggle.active #line3 {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 1.5rem;
}

/* Header scroll state */
#header.scrolled {
    box-shadow: 0 1px 0 rgba(10, 25, 47, 0.05);
}

/* Custom select arrow */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%230A192F' stroke-width='1.5'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    padding-right: 2rem;
}

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

/* Focus visible */
:focus-visible {
    outline: 2px solid #98FFFB;
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
}