/* =============================================
   INVENTORY MODULE DESIGN SYSTEM
   ============================================= */

/* --- CSS Variables / Tokens --- */
:root {
    --inv-primary: #6366f1;
    --inv-primary-light: #818cf8;
    --inv-primary-dark: #4f46e5;
    --inv-success: #22c55e;
    --inv-success-light: #dcfce7;
    --inv-warning: #f59e0b;
    --inv-warning-light: #fef3c7;
    --inv-danger: #ef4444;
    --inv-danger-light: #fee2e2;
    --inv-info: #06b6d4;
    --inv-info-light: #cffafe;
    --inv-bg: #f8fafc;
    --inv-card-bg: #ffffff;
    --inv-border: #e2e8f0;
    --inv-text: #1e293b;
    --inv-text-muted: #64748b;
    --inv-text-light: #94a3b8;
    --inv-radius: 12px;
    --inv-radius-sm: 8px;
    --inv-shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);
    --inv-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);
    --inv-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .05);
    --inv-transition: all .2s ease;
}

/* --- Dashboard Layout --- */
.inv-dashboard {
    padding: 24px;
    background: var(--inv-bg);
    min-height: calc(100vh - 60px);
}

.inv-dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

.inv-dashboard-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--inv-text);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.inv-dashboard-header h1 i {
    color: var(--inv-primary);
    font-size: 1.5rem;
}

.inv-subtitle {
    color: var(--inv-text-muted);
    font-size: .9rem;
    margin-top: 4px;
}

.inv-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.inv-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--inv-radius-sm);
    font-size: .85rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--inv-transition);
    text-decoration: none;
}

.inv-btn-primary {
    background: linear-gradient(135deg, var(--inv-primary), var(--inv-primary-dark));
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, .35);
}

.inv-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, .45);
    color: #fff;
}

.inv-btn-outline {
    background: var(--inv-card-bg);
    color: var(--inv-text);
    border: 1px solid var(--inv-border);
}

.inv-btn-outline:hover {
    border-color: var(--inv-primary-light);
    color: var(--inv-primary);
    background: #f0f0ff;
}

/* --- KPI Cards --- */
.inv-kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.inv-kpi-card {
    background: var(--inv-card-bg);
    border-radius: var(--inv-radius);
    padding: 22px;
    box-shadow: var(--inv-shadow);
    border: 1px solid var(--inv-border);
    transition: var(--inv-transition);
    position: relative;
    overflow: hidden;
}

.inv-kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: var(--inv-radius) 0 0 var(--inv-radius);
}

.inv-kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--inv-shadow-md);
}

.inv-kpi-card.success::before {
    background: var(--inv-success);
}

.inv-kpi-card.warning::before {
    background: var(--inv-warning);
}

.inv-kpi-card.danger::before {
    background: var(--inv-danger);
}

.inv-kpi-card.info::before {
    background: var(--inv-info);
}

.inv-kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.inv-kpi-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.inv-kpi-icon.success {
    background: var(--inv-success-light);
    color: var(--inv-success);
}

.inv-kpi-icon.warning {
    background: var(--inv-warning-light);
    color: var(--inv-warning);
}

.inv-kpi-icon.danger {
    background: var(--inv-danger-light);
    color: var(--inv-danger);
}

.inv-kpi-icon.info {
    background: var(--inv-info-light);
    color: var(--inv-info);
}

.inv-kpi-label {
    font-size: .8rem;
    color: var(--inv-text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.inv-kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--inv-text);
    line-height: 1.2;
}

.inv-kpi-trend {
    font-size: .78rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 6px;
}

.inv-kpi-trend.up {
    color: var(--inv-success);
}

.inv-kpi-trend.down {
    color: var(--inv-danger);
}

/* --- Content Grid --- */
.inv-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
}

@media (max-width: 992px) {
    .inv-content-grid {
        grid-template-columns: 1fr;
    }
}

.inv-card {
    background: var(--inv-card-bg);
    border-radius: var(--inv-radius);
    box-shadow: var(--inv-shadow);
    border: 1px solid var(--inv-border);
    overflow: hidden;
}

.inv-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    border-bottom: 1px solid var(--inv-border);
}

.inv-card-title {
    font-size: .95rem;
    font-weight: 700;
    color: var(--inv-text);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.inv-card-title i {
    color: var(--inv-primary);
}

.inv-card-body {
    padding: 22px;
}

/* --- Alerts Panel --- */
.inv-alert-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.inv-alert-summary {
    font-size: .8rem;
    font-weight: 600;
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 10px;
}

.inv-alert-summary.has-alerts {
    background: #fff7ed;
    color: #c2410c;
    border: 1px solid #fed7aa;
}

.inv-alert-summary.all-good {
    background: #ecfdf3;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.inv-alert-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid #f1f5f9;
    transition: var(--inv-transition);
}

.inv-alert-item:last-child {
    border-bottom: none;
}

.inv-alert-item:hover {
    background: #fafbfd;
    margin: 0 -22px;
    padding-left: 22px;
    padding-right: 22px;
}

.inv-alert-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-top: 5px;
    flex-shrink: 0;
    animation: pulse-dot 2s infinite;
}

.inv-alert-dot.critical {
    background: var(--inv-danger);
}

.inv-alert-dot.warning {
    background: var(--inv-warning);
}

.inv-alert-dot.info {
    background: var(--inv-info);
}

.inv-alert-dot.safe {
    background: var(--inv-success);
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: .4;
    }
}

.inv-alert-content {
    flex: 1;
}

.inv-alert-title {
    font-size: .85rem;
    font-weight: 600;
    color: var(--inv-text);
    margin-bottom: 2px;
}

.inv-alert-desc {
    font-size: .78rem;
    color: var(--inv-text-muted);
}

.inv-alert-time {
    font-size: .72rem;
    color: var(--inv-text-light);
    white-space: nowrap;
}

.inv-alert-link {
    color: var(--inv-primary-dark);
    text-decoration: none;
    font-weight: 600;
}

.inv-alert-link:hover {
    text-decoration: underline;
    color: var(--inv-primary);
}

/* --- Quick Access Grid --- */
.inv-quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 14px;
}

.inv-quick-card {
    text-align: center;
    padding: 20px 12px;
    border-radius: var(--inv-radius-sm);
    border: 1px solid var(--inv-border);
    background: var(--inv-card-bg);
    transition: var(--inv-transition);
    text-decoration: none;
    color: var(--inv-text);
    cursor: pointer;
}

.inv-quick-card:hover {
    border-color: var(--inv-primary-light);
    box-shadow: var(--inv-shadow-md);
    transform: translateY(-2px);
    color: var(--inv-primary);
}

.inv-quick-card i {
    font-size: 1.6rem;
    margin-bottom: 8px;
    display: block;
    color: var(--inv-primary);
}

.inv-quick-card span {
    font-size: .78rem;
    font-weight: 600;
    display: block;
}

/* --- IoT Table --- */
.inv-iot-table {
    width: 100%;
    border-collapse: collapse;
}

.inv-iot-table th {
    text-align: left;
    font-size: .72rem;
    font-weight: 600;
    color: var(--inv-text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: 10px 12px;
    border-bottom: 2px solid var(--inv-border);
}

.inv-iot-table td {
    padding: 12px;
    font-size: .82rem;
    color: var(--inv-text);
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.inv-iot-table tr:hover td {
    background: #fafbfd;
}

.inv-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 600;
    gap: 4px;
}

.inv-badge.success {
    background: var(--inv-success-light);
    color: #16a34a;
}

.inv-badge.warning {
    background: var(--inv-warning-light);
    color: #d97706;
}

.inv-badge.danger {
    background: var(--inv-danger-light);
    color: #dc2626;
}

.inv-badge.info {
    background: var(--inv-info-light);
    color: #0891b2;
}

/* --- Chart Container --- */
.inv-chart-container {
    position: relative;
    height: 280px;
    width: 100%;
}

/* --- Sidebar Inventory Section --- */
.inv-sidebar-section {
    padding: 0;
    margin: 0;
}

.inv-sidebar-header {
    font-size: .65rem;
    font-weight: 700;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    padding: 18px 16px 6px;
    margin: 0;
}

.inv-sidebar-divider {
    border: none;
    border-top: 1px solid #e2e8f0;
    margin: 6px 16px;
}

.inv-sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 16px;
    color: #475569;
    font-size: .82rem;
    font-weight: 500;
    text-decoration: none;
    transition: all .15s ease;
    border-radius: 6px;
    margin: 2px 8px;
}

.inv-sidebar-link:hover {
    background: #f1f5f9;
    color: var(--inv-primary);
}

.inv-sidebar-link.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, .08), rgba(99, 102, 241, .04));
    color: var(--inv-primary);
    font-weight: 600;
}

.inv-sidebar-link i {
    width: 20px;
    text-align: center;
    font-size: .9rem;
}

.inv-sidebar-badge {
    margin-left: auto;
    background: var(--inv-danger);
    color: #fff;
    font-size: .65rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 999px;
    min-width: 18px;
    text-align: center;
}

.inv-sidebar-badge.warning {
    background: var(--inv-warning);
}

.inv-sidebar-badge.info {
    background: var(--inv-info);
}

/* --- Full-width card (spans whole row) --- */
.inv-card-full {
    grid-column: 1 / -1;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .inv-dashboard {
        padding: 16px;
    }

    .inv-kpi-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .inv-dashboard-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .inv-quick-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 480px) {
    .inv-kpi-grid {
        grid-template-columns: 1fr;
    }

    .inv-quick-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}