/* ===== DARK MODE (PREMIUM) ===== */
body.dark {
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, .08), transparent 55%),
        radial-gradient(circle at bottom right, rgba(34, 197, 94, .10), transparent 55%),
        #020617;
    color: #e5e7eb;
}

/* Navbar */
body.dark nav {
    background: rgba(2, 6, 23, .7);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}

body.dark .nav-links a {
    color: #cbd5f5;
}

body.dark .nav-links a:hover {
    color: white;
}

/* Cards */
body.dark .card {
    background: linear-gradient(180deg, #020617, #020617);
    box-shadow: 0 40px 80px rgba(0, 0, 0, .6);
}

body.dark .card p {
    color: #9ca3af;
}

/* Feature Section */
body.dark .feature {
    background: linear-gradient(135deg, #020617, #030712);
}

/* Footer */
body.dark footer {
    background: #020617;
    color: #94a3b8;
}