/* General responsive helpers (non-destructive) */
img, video, iframe {
    max-width: 100%;
    height: auto;
}

/* Ensure common containers fit small screens without changing desktop styles */
.container, .content, .main, .card, .hero-shell, .hero-card, .stats-grid {
    box-sizing: border-box;
}

/* Small-screen adjustments only (preserve desktop styling) */
@media (max-width: 768px) {
    html, body {
        -webkit-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
    }

    .top-bar {
        padding: 0 12px;
        height: auto;
        gap: 8px;
        flex-wrap: wrap;
        align-items: center;
    }

    .hero-shell {
        margin: 24px auto;
        padding: 0 12px;
    }

    .hero-card {
        padding: 28px;
        border-radius: 16px;
    }

    .hero-card h1 {
        font-size: 2rem;
    }

    .hero-card p {
        font-size: 1rem;
        margin: 16px auto 20px;
    }

    .primary-button, .secondary-button {
        padding: 10px 16px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-top: 20px;
    }

    .nav-link {
        padding: 8px 10px;
    }
}

@media (max-width: 420px) {
    .hero-card h1 {
        font-size: 1.6rem;
    }

    .hero-card p {
        font-size: 0.95rem;
    }
}