// snackbar.js — лёгкие уведомления (без зависимостей)
// showSnackbar(msg, type='info') — type: info, success, error

function showSnackbar(msg, type) {
    type = type || 'info';
    let container = document.getElementById('snackbar-container');
    if (!container) {
        container = document.createElement('div');
        container.id = 'snackbar-container';
        container.className = 'snackbar-container';
        container.setAttribute('role', 'status');
        container.setAttribute('aria-live', 'polite');
        document.body.appendChild(container);
    }
    const el = document.createElement('div');
    el.className = 'snackbar ' + type;
    el.textContent = msg;
    el.onclick = function() { el.remove(); };
    container.appendChild(el);

    // Limit stacking
    const all = container.querySelectorAll('.snackbar');
    if (all.length > 4) all[0].remove();

    // Auto-hide: info/success 4s, error 8s
    const delay = (type === 'error') ? 8000 : 4000;
    setTimeout(function() {
        if (el.parentNode) el.remove();
    }, delay);
}