/* ================================================================
   BILLING DISCREPANCY BANNER
   Site-wide warning banner for unresolved billing states
   ================================================================ */

.billing-discrepancy-banner {
    position: -webkit-sticky;
    position: sticky;
    top: 0; 
    z-index: var(--z-sticky, 1020);
    width: 100%;
    /* Using existing accent-gold token for the warning feel without being red/error */
    background-color: var(--accent-gold);
    color: var(--bg-dark, #212529); 
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-card);
    border-bottom: 1px solid rgba(0,0,0,0.1);
    /* Prevent text selection rendering artifacts if double-clicked */
    user-select: none;
}

@keyframes slideDownBanner {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (prefers-reduced-motion: no-preference) {
    .billing-discrepancy-banner {
        animation: slideDownBanner 0.2s ease-out forwards;
    }
}

/* Hidden States */
.billing-discrepancy-banner--dismissed {
    display: none !important;
}

/* Pure CSS Dismiss Fallback */
.billing-discrepancy-banner:has(.billing-discrepancy-banner__dismiss-toggle:checked) {
    display: none !important;
}

.billing-discrepancy-banner__dismiss-toggle {
    display: none;
}

.billing-discrepancy-banner__content {
    display: flex;
    flex: 1;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap; 
}

.billing-discrepancy-banner__icon {
    font-size: 1.25rem;
    display: inline-flex;
    flex-shrink: 0;
    color: var(--bg-dark, #212529);
}

.billing-discrepancy-banner__message {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base, 1rem); /* Base size for readability */
    line-height: var(--line-height-sm, 1.45);
    flex: 1 1 auto;
    min-width: 200px;
}

.billing-discrepancy-banner__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-dark, #212529);
    color: var(--text-white, #ffffff) !important;
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    padding: var(--btn-padding-sm-y, 0.25rem) var(--btn-padding-x, 1rem);
    border-radius: var(--radius-sm, 0.5rem);
    font-size: var(--font-size-sm, 0.875rem);
    transition: background-color var(--transition-fast, 0.15s ease), transform var(--transition-fast, 0.15s ease);
    /* Minimum touch target 44px */
    min-height: var(--min-touch-target-wcag, 44px);
    white-space: nowrap;
    border: 2px solid transparent;
}

.billing-discrepancy-banner__cta:hover {
    background-color: #000000;
    transform: translateY(-1px);
    color: var(--text-white, #ffffff);
}

.billing-discrepancy-banner__cta:focus-visible {
    outline: none;
    /* High contrast focus ring that stands out on gold background */
    box-shadow: 0 0 0 2px var(--accent-gold), 0 0 0 4px var(--bg-dark, #212529); 
}

.billing-discrepancy-banner__dismiss {
    background: transparent;
    border: none;
    color: var(--bg-dark, #212529);
    opacity: 0.8;
    padding: var(--spacing-xs, 0.25rem);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    /* Maintain 44x44px hit area footprint without bloating physical visual size too much */
    min-width: var(--min-touch-target-wcag, 44px);
    min-height: var(--min-touch-target-wcag, 44px);
    border-radius: var(--radius-sm, 0.5rem);
    transition: opacity var(--transition-fast, 0.15s ease), background-color var(--transition-fast, 0.15s ease);
}

.billing-discrepancy-banner__dismiss:hover {
    opacity: 1;
    background-color: rgba(0, 0, 0, 0.05);
}

.billing-discrepancy-banner__dismiss:focus-visible {
    opacity: 1;
    outline: none;
    background-color: rgba(0, 0, 0, 0.05);
    box-shadow: inset 0 0 0 2px var(--bg-dark, #212529);
}

/* Mobile Stacking (< 640px) */
@media (max-width: 639.98px) {
    .billing-discrepancy-banner {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md) var(--spacing-sm);
        position: relative; /* On tiny screens, content pushes it away to preserve real estate? We can keep it sticky if space permits */
    }
    
    .billing-discrepancy-banner__content {
        align-items: flex-start;
        width: 100%;
        padding-right: var(--spacing-xl); /* Room for absolute dismiss icon */
    }
    
    .billing-discrepancy-banner__icon {
        margin-top: 2px; /* optical alignment with multi-line text */
    }

    .billing-discrepancy-banner__dismiss {
        position: absolute;
        top: var(--spacing-xs);
        right: var(--spacing-xs);
    }

    .billing-discrepancy-banner__cta {
        width: 100%;
        margin-top: var(--spacing-sm);
    }
}