/**
 * Toast Notification Component
 * Feature: 051-optimistic-collect (FR-009)
 *
 * Accessible toast notifications for error/success feedback.
 * Bottom-center position, auto-dismiss, optional action buttons.
 *
 * Z-index: 9999 (above all other elements)
 */

/* ==========================================================================
   Toast Container
   ========================================================================== */

.qs-toast-container {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    pointer-events: none;
    /* Safe area inset for iOS devices */
    padding-bottom: env(safe-area-inset-bottom, 0);
}

/* ==========================================================================
   Toast Base Styles
   ========================================================================== */

.qs-toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--qs-toast-bg, #1a1a1a);
    color: var(--qs-toast-text, #fff);
    border-radius: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 200ms ease-out, transform 200ms ease-out;
    max-width: min(90vw, 400px);
    min-width: 280px;
}

.qs-toast--visible {
    opacity: 1;
    transform: translateY(0);
}

.qs-toast--hiding {
    opacity: 0;
    transform: translateY(0.5rem);
}

/* ==========================================================================
   Toast Type Variants
   ========================================================================== */

.qs-toast--error {
    border-left: 4px solid var(--bs-danger, #dc3545);
}

.qs-toast--success {
    border-left: 4px solid var(--bs-success, #198754);
}

.qs-toast--info {
    border-left: 4px solid var(--bs-info, #0dcaf0);
}

/* ==========================================================================
   Toast Content
   ========================================================================== */

.qs-toast__message {
    flex: 1;
    font-size: 0.9rem;
    line-height: 1.4;
}

/* ==========================================================================
   Toast Action Button
   ========================================================================== */

.qs-toast__action {
    background: transparent;
    border: 1px solid currentColor;
    color: inherit;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 150ms ease;
    white-space: nowrap;
}

.qs-toast__action:hover {
    background: rgba(255, 255, 255, 0.15);
}

.qs-toast__action:focus {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

/* ==========================================================================
   Toast Close Button
   ========================================================================== */

.qs-toast__close {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    margin-left: 0.25rem;
}

.qs-toast__close:hover {
    color: #fff;
}

.qs-toast__close:focus {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

/* ==========================================================================
   Accessibility: Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .qs-toast {
        transition: none;
    }
}

/* ==========================================================================
   Mobile Adjustments
   ========================================================================== */

@media (max-width: 480px) {
    .qs-toast-container {
        left: 0.5rem;
        right: 0.5rem;
        transform: none;
        bottom: 0.5rem;
    }

    .qs-toast {
        max-width: 100%;
        min-width: auto;
    }
}