/**
 * ============================================
 * POS Design System - Components & Utilities
 * ============================================
 *
 * Reusable component classes and utility classes
 * that use design system tokens.
 *
 * @version 1.0.0
 */

/* ============================================
 * UTILITY - BACKGROUNDS
 * ============================================ */
.bg-surface { background-color: var(--color-surface) !important; }
.bg-elevated { background-color: var(--color-elevated) !important; }
.bg-primary { background-color: var(--color-primary) !important; }
.bg-success { background-color: var(--color-success) !important; }
.bg-warning { background-color: var(--color-warning) !important; }
.bg-danger { background-color: var(--color-danger) !important; }
.bg-info { background-color: var(--color-info) !important; }
.bg-primary-subtle { background-color: var(--color-primary-subtle) !important; }
.bg-success-subtle { background-color: var(--color-success-subtle) !important; }
.bg-warning-subtle { background-color: var(--color-warning-subtle) !important; }
.bg-danger-subtle { background-color: var(--color-danger-subtle) !important; }
.bg-info-subtle { background-color: var(--color-info-subtle) !important; }

/* ============================================
 * UTILITY - TEXT
 * ============================================ */
.text-primary { color: var(--color-primary) !important; }
.text-success { color: var(--color-success) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-info { color: var(--color-info) !important; }
.text-muted { color: var(--color-text-muted) !important; }
.text-secondary { color: var(--color-text-secondary) !important; }
.text-heading { color: var(--color-heading) !important; }

/* ============================================
 * UTILITY - BORDERS
 * ============================================ */
.border-primary { border-color: var(--color-primary) !important; }
.border-success { border-color: var(--color-success) !important; }
.border-warning { border-color: var(--color-warning) !important; }
.border-danger { border-color: var(--color-danger) !important; }
.border-info { border-color: var(--color-info) !important; }

/* ============================================
 * UTILITY - FOCUS RING
 * ============================================ */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

.focus-visible:focus-visible {
    outline: none;
    box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

/* ============================================
 * STAT CARDS (Dashboard)
 * ============================================ */
.stat-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-4);
    border-left: 4px solid var(--color-primary);
    transition: all var(--duration-normal) var(--ease-in-out);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-card--primary { border-left-color: var(--color-primary); }
.stat-card--success { border-left-color: var(--color-success); }
.stat-card--warning { border-left-color: var(--color-warning); }
.stat-card--danger { border-left-color: var(--color-danger); }
.stat-card--info { border-left-color: var(--color-info); }

.stat-card__title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

.stat-card__value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-heading);
    line-height: var(--line-height-tight);
}

.stat-card__change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin-top: var(--space-1);
}

.stat-card__change--positive { color: var(--color-success); }
.stat-card__change--negative { color: var(--color-danger); }
.stat-card__change--neutral { color: var(--color-text-muted); }

/* ============================================
 * ICON CONTAINERS
 * ============================================ */
.icon-container {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-lg);
}

.icon-container--sm { width: 2rem; height: 2rem; }
.icon-container--lg { width: 3rem; height: 3rem; }

.icon-container--primary {
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
}

.icon-container--success {
    background-color: var(--color-success-subtle);
    color: var(--color-success);
}

.icon-container--warning {
    background-color: var(--color-warning-subtle);
    color: var(--color-warning);
}

.icon-container--danger {
    background-color: var(--color-danger-subtle);
    color: var(--color-danger);
}

.icon-container--info {
    background-color: var(--color-info-subtle);
    color: var(--color-info);
}

/* ============================================
 * EMPTY STATES
 * ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    text-align: center;
}

.empty-state__icon {
    font-size: 3rem;
    color: var(--color-text-muted);
    opacity: 0.5;
    margin-bottom: var(--space-4);
}

.empty-state__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-heading-secondary);
    margin-bottom: var(--space-2);
}

.empty-state__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    max-width: 24rem;
}

/* ============================================
 * CHART CONTAINER
 * ============================================ */
.chart-container {
    background: var(--color-card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.chart-container__header {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.chart-container__title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin: 0;
}

.chart-container__body {
    padding: var(--space-4);
}

/* ============================================
 * STATUS INDICATORS
 * ============================================ */
.status-dot {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-full);
}

.status-dot--available { background-color: var(--color-status-available); }
.status-dot--busy { background-color: var(--color-status-busy); }
.status-dot--reserved { background-color: var(--color-status-reserved); }
.status-dot--pending { background-color: var(--color-status-pending); }
.status-dot--preparing { background-color: var(--color-status-preparing); }
.status-dot--delivered { background-color: var(--color-status-delivered); }
.status-dot--cancelled { background-color: var(--color-status-cancelled); }

/* Animated pulse for active states */
.status-dot--pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================
 * LOADING SKELETON
 * ============================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-surface) 0%,
        var(--color-surface-hover) 50%,
        var(--color-surface) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton--text {
    height: 1rem;
    margin-bottom: var(--space-2);
}

.skeleton--title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: var(--space-3);
}

.skeleton--avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
}

/* ============================================
 * DIVIDERS
 * ============================================ */
.divider {
    height: 1px;
    background-color: var(--color-border);
    margin: var(--space-4) 0;
}

.divider--light {
    background-color: var(--color-border-light);
}

.divider--vertical {
    width: 1px;
    height: auto;
    margin: 0 var(--space-3);
}

/* ============================================
 * QUICK ACTION BUTTONS
 * ============================================ */
.quick-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-in-out);
}

.quick-action:hover {
    background-color: var(--color-surface-hover);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.quick-action:focus {
    outline: none;
    box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

.quick-action--primary:hover {
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.quick-action--danger:hover {
    background-color: var(--color-danger-subtle);
    color: var(--color-danger);
    border-color: var(--color-danger);
}

/* ============================================
 * THEME TOGGLE BUTTON
 * ============================================ */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-in-out);
}

.theme-toggle:hover {
    background-color: var(--color-surface-hover);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.theme-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

/* Sun icon for dark theme, moon icon for light theme */
[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: inline; }

/* ============================================
 * TRANSITION UTILITIES
 * ============================================ */
.transition-colors {
    transition: background-color var(--duration-fast) var(--ease-in-out),
                border-color var(--duration-fast) var(--ease-in-out),
                color var(--duration-fast) var(--ease-in-out);
}

.transition-all {
    transition: all var(--duration-normal) var(--ease-in-out);
}

.transition-transform {
    transition: transform var(--duration-fast) var(--ease-in-out);
}

/* ============================================
 * RESPONSIVE UTILITIES
 * ============================================ */
@media (max-width: 768px) {
    .stat-card {
        padding: var(--space-3);
    }

    .stat-card__value {
        font-size: var(--font-size-xl);
    }

    .chart-container__header {
        padding: var(--space-2) var(--space-3);
    }
}

/* ============================================
 * PRINT STYLES
 * ============================================ */
@media print {
    body {
        background-color: #ffffff !important;
        color: #000000 !important;
    }

    .card,
    .stat-card,
    .chart-container {
        box-shadow: none !important;
        border: 1px solid #dee2e6 !important;
    }

    .theme-toggle,
    .sidebar-theme,
    .navbar {
        display: none !important;
    }
}