/* Base & Typography */
    html {
        scroll-behavior: smooth;
        scroll-padding-top: 80px;
    }

    body {
        overflow-x: hidden;
    }

    ::selection {
        background: rgba(45, 212, 191, 0.3);
        color: #f1f5f9;
    }

    /* Scrollbar */
    ::-webkit-scrollbar {
        width: 8px;
    }
    ::-webkit-scrollbar-track {
        background: #0a0f1e;
    }
    ::-webkit-scrollbar-thumb {
        background: #1e293b;
        border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: #334155;
    }

    /* Navbar */
    #navbar {
        background: transparent;
        transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
    }

    #navbar.scrolled {
        background: rgba(6, 11, 24, 0.85);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: 0 1px 0 rgba(45, 212, 191, 0.05), 0 4px 30px rgba(0, 0, 0, 0.3);
    }

    .nav-link::after {
        content: '';
        display: block;
        width: 0;
        height: 1.5px;
        background: linear-gradient(90deg, #2dd4bf, #14b8a6);
        transition: width 0.3s ease;
        margin-top: 2px;
    }

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

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

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

    .mobile-nav-link {
        position: relative;
        padding-left: 0;
    }

    /* Hero Stat Cards */
    .stat-card {
        animation: floatIn 0.6s ease both;
    }

    .stat-card:nth-child(1) { animation-delay: 0.1s; }
    .stat-card:nth-child(2) { animation-delay: 0.2s; }
    .stat-card:nth-child(3) { animation-delay: 0.3s; }
    .stat-card:nth-child(4) { animation-delay: 0.4s; }

    @keyframes floatIn {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Scroll Reveal */
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    /* Button hover glow effect */
    .group:hover .group-hover\:scale-110 {
        transform: scale(1.1);
    }

    /* Image hover */
    .rounded-2xl.overflow-hidden {
        overflow: hidden;
    }

    /* Form 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='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
    }

    /* Reduced motion */
    @media (prefers-reduced-motion: reduce) {
        html {
            scroll-behavior: auto;
        }
        .stat-card {
            animation: none;
            opacity: 1;
        }
        .reveal {
            opacity: 1 !important;
            transform: none !important;
        }
        .rounded-2xl.overflow-hidden img {
            transition: none;
        }
    }

    /* Focus visible */
    :focus-visible {
        outline: 2px solid #2dd4bf;
        outline-offset: 2px;
    }