/* --- CORE VARIABLES --- */
    :root {
        /* Refined Palette */
        --primary: #004B87;
        --primary-dark: #003666;
        --secondary: #FFCD00;
        --secondary-hover: #e6b800;
        --dark: #0f172a;
        /* Darker, more modern navy/black */
        --light: #f8fafc;
        --text: #334155;
        --text-light: #64748b;
        --white: #ffffff;

        /* Spacing & Effects */
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
        --radius: 8px;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'Inter', sans-serif;
        /* Modern Tech Font */
        margin: 0;
        padding: 0;
        color: var(--text);
        line-height: 1.6;
        background-color: var(--white);
        overflow-x: hidden;
    }

    /* --- HEADER & NAV --- */
    header {
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        /* "Frosted Glass" effect */
        box-shadow: var(--shadow-sm);
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
        transition: var(--transition);
    }

    /* Class added via JS when scrolling */
    header.scrolled {
        box-shadow: var(--shadow-md);
        padding: 5px 0;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 80px;
    }

    .logo {
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--primary);
        text-decoration: none;
        letter-spacing: -0.02em;
    }

    .logo span {
        color: var(--dark);
    }

    .nav-links {
        display: flex;
        gap: 32px;
        align-items: center;
    }

    .nav-links a {
        text-decoration: none;
        color: var(--text);
        font-weight: 500;
        font-size: 0.95rem;
        transition: var(--transition);
    }

    .nav-links a:not(.btn-login):hover {
        color: var(--primary);
    }

    .nav-links a.btn-login {
        background-color: var(--primary);
        color: white;
        padding: 10px 24px;
        border-radius: var(--radius);
        font-weight: 600;
    }

    .nav-links a.btn-login:hover {
        background-color: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(0, 75, 135, 0.2);
    }

    /* Mobile Menu Button (Hidden on Desktop) */
    .mobile-menu-btn {
        display: none;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--dark);
    }

    /* --- HERO SECTION --- */
    .hero {
        /* Modern Gradient */
        background: linear-gradient(135deg, var(--primary) 0%, #0f172a 100%);
        color: white;
        padding: 180px 0 120px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    /* Abstract Background decoration */
    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
        background-size: 40px 40px;
        opacity: 0.3;
        pointer-events: none;
    }

    .hero h1 {
        font-size: 3.5rem;
        margin-bottom: 24px;
        font-weight: 800;
        letter-spacing: -0.03em;
        line-height: 1.1;
    }

    .hero p {
        font-size: 1.25rem;
        color: #cbd5e1;
        /* Softer white for reading */
        max-width: 600px;
        margin: 0 auto 48px;
    }

    .cta-button {
        display: inline-block;
        background-color: var(--secondary);
        color: var(--primary-dark);
        padding: 16px 40px;
        border-radius: var(--radius);
        text-decoration: none;
        font-weight: 700;
        font-size: 1.1rem;
        transition: var(--transition);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .cta-button:hover {
        background-color: var(--secondary-hover);
        transform: translateY(-2px);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
    }

    /* --- FEATURES --- */
    .features {
        padding: 100px 0;
        background-color: var(--light);
    }

    .section-header {
        text-align: center;
        margin-bottom: 60px;
    }

    .grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 40px;
    }

    .card {
        background: white;
        padding: 40px;
        border-radius: 12px;
        box-shadow: var(--shadow-sm);
        border: 1px solid rgba(0, 0, 0, 0.05);
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }

    .card::top {
        /* Decorative colored line */
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: var(--primary);
    }

    .card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-lg);
    }

    .card h3 {
        color: var(--primary);
        font-size: 1.5rem;
        margin-top: 0;
        margin-bottom: 16px;
    }

    .card p {
        color: var(--text-light);
        margin: 0;
    }

    /* --- SPECS --- */
    .specs {
        padding: 100px 0;
    }

    .specs h2 {
        text-align: center;
        font-size: 2.5rem;
        color: var(--dark);
        margin-bottom: 20px;
    }

    table {
        width: 100%;
        border-collapse: separate;
        border-spacing: 0;
        margin-top: 20px;
        border: 1px solid #e2e8f0;
        border-radius: 12px;
        overflow: hidden;
    }

    th,
    td {
        text-align: left;
        padding: 20px 24px;
        border-bottom: 1px solid #e2e8f0;
    }

    th {
        background-color: #f1f5f9;
        color: var(--dark);
        font-weight: 700;
        text-transform: uppercase;
        font-size: 0.85rem;
        letter-spacing: 0.05em;
    }

    tr:last-child td {
        border-bottom: none;
    }

    tr:hover td {
        background-color: #f8fafc;
    }

    /* --- FOOTER --- */
    footer {
        background-color: var(--dark);
        color: #94a3b8;
        padding: 80px 0 40px;
        font-size: 0.95rem;
    }

    .footer-content {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 40px;
    }

    .footer-col h4 {
        color: white;
        margin-bottom: 24px;
        font-size: 1.1rem;
    }

    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .footer-col li {
        margin-bottom: 12px;
    }

    .footer-col a {
        color: #94a3b8;
        text-decoration: none;
        transition: color 0.2s;
    }

    .footer-col a:hover {
        color: white;
    }

    .copyright {
        text-align: center;
        margin-top: 60px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 30px;
        font-size: 0.85rem;
    }

    /* --- ANIMATION CLASSES (JS will toggle these) --- */
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: all 0.8s ease-out;
    }

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

    /* --- MOBILE RESPONSIVENESS --- */
    @media (max-width: 768px) {
        .mobile-menu-btn {
            display: block;
            /* Show hamburger on mobile */
        }

        .nav-links {
            position: absolute;
            top: 80px;
            left: 0;
            width: 100%;
            background-color: white;
            flex-direction: column;
            padding: 20px 0;
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
            clip-path: circle(0% at 100% 0);
            /* Cool transition setup */
            transition: clip-path 0.5s ease-in-out;
        }

        .nav-links.active {
            clip-path: circle(150% at 100% 0);
        }

        .nav-links a {
            margin: 15px 0;
        }

        .hero h1 {
            font-size: 2.5rem;
        }

        .container {
            padding: 0 20px;
        }
    }