/* ================================
   BESS Management Design System
   Modern, Professional & Mobile-First
   ================================ */

/* CSS Variables */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
}

/* ================================
   Typography & Text Utilities
   ================================ */

.fw-700 {
    font-weight: 700;
}

.fw-600 {
    font-weight: 600;
}

.fw-500 {
    font-weight: 500;
}

.text-muted {
    color: rgba(0, 0, 0, 0.56);
}

.text-primary {
    color: var(--mud-palette-primary) !important;
}

.text-success {
    color: var(--mud-palette-success) !important;
}

.text-warning {
    color: var(--mud-palette-warning) !important;
}

.text-error {
    color: var(--mud-palette-error) !important;
}

.brand-primary {
    color: #667eea;
}

.brand-gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Text Overflow */
.ellipsis-1 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ellipsis-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ellipsis-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ================================
   Border Radius Utilities
   ================================ */

.br-4 {
    border-radius: 4px;
}

.br-8 {
    border-radius: var(--radius-sm);
}

.br-10 {
    border-radius: 10px;
}

.br-12 {
    border-radius: var(--radius-md);
}

.br-16 {
    border-radius: var(--radius-lg);
}

.br-20 {
    border-radius: var(--radius-xl);
}

.br-full {
    border-radius: var(--radius-full);
}

/* ================================
   Page Layout
   ================================ */

.page-container {
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
    animation: fadeIn 0.4s ease;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation: slideDown 0.4s ease;
}

    .page-header .left {
        flex: 1;
        min-width: 0;
    }

    .page-header .title {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        font-weight: 700;
        color: var(--mud-palette-text-primary);
    }

    .page-header .subtitle {
        margin-top: 4px;
        color: var(--mud-palette-text-secondary);
        font-size: 0.9rem;
    }

    .page-header .right {
        flex-shrink: 0;
    }

/* ================================
   Sections & Cards
   ================================ */

.section {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: var(--mud-palette-background-paper);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--mud-palette-divider);
    transition: all var(--transition-base);
    animation: fadeInUp 0.5s ease;
}

    .section:hover {
        box-shadow: var(--shadow-md);
    }

    .section + .section {
        margin-top: var(--spacing-lg);
    }

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--mud-palette-divider);
}

.section-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--mud-palette-text-primary);
}

/* Card Variants */
.card-elevated {
    box-shadow: var(--shadow-lg);
}

.card-gradient {
    background: var(--primary-gradient);
    color: white;
}

.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* ================================
   Sticky Elements
   ================================ */

.sticky-top {
    position: sticky;
    top: 48px;
    z-index: 11;
    background: var(--mud-palette-background);
    padding: var(--spacing-md) 0;
    margin: -8px 0 var(--spacing-md);
    border-bottom: 1px solid var(--mud-palette-divider);
    backdrop-filter: blur(8px);
    animation: slideDown 0.3s ease;
}

.sticky-search {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--mud-palette-background);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--mud-palette-divider);
    backdrop-filter: blur(8px);
}

/* ================================
   Tables - Modern Design
   ================================ */

.table-card {
    overflow: hidden;
    border-radius: var(--radius-lg);
}

    .table-card table {
        border-collapse: separate !important;
        border-spacing: 0 var(--spacing-md);
    }

    .table-card thead th {
        color: var(--mud-palette-text-secondary);
        font-weight: 600;
        font-size: 0.875rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        border-bottom: none !important;
        padding: var(--spacing-md) var(--spacing-lg) !important;
    }

    .table-card tbody tr {
        background: var(--mud-palette-background-paper);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        transition: all var(--transition-base);
    }

    .table-card tbody td {
        border-top: none !important;
        border-bottom: none !important;
        padding: var(--spacing-lg) !important;
        vertical-align: middle;
    }

        .table-card tbody td:first-child {
            border-top-left-radius: var(--radius-md);
            border-bottom-left-radius: var(--radius-md);
        }

        .table-card tbody td:last-child {
            border-top-right-radius: var(--radius-md);
            border-bottom-right-radius: var(--radius-md);
        }

.table-row-hover tbody tr {
    cursor: pointer;
    transition: all var(--transition-base);
}

    .table-row-hover tbody tr:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
        background: var(--mud-palette-action-default-hover);
    }

    .table-row-hover tbody tr:active {
        transform: translateY(0);
    }

/* Table Size Variants */
.table-tight thead th,
.table-tight tbody td {
    padding: var(--spacing-sm) var(--spacing-md) !important;
}

.table-comfortable thead th,
.table-comfortable tbody td {
    padding: var(--spacing-xl) var(--spacing-lg) !important;
}

/* ================================
   Key-Value Display
   ================================ */

.kv-table {
    width: 100%;
}

    .kv-table td {
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--mud-palette-divider);
    }

    .kv-table tr:last-child td {
        border-bottom: none;
    }

.kv-k {
    font-weight: 500;
    color: var(--mud-palette-text-secondary);
    min-width: 140px;
}

.kv-v {
    font-weight: 600;
    color: var(--mud-palette-text-primary);
}

/* Horizontal KV */
.kv-horizontal {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--mud-palette-action-default-hover);
}

    .kv-horizontal .label {
        font-weight: 500;
        color: var(--mud-palette-text-secondary);
    }

    .kv-horizontal .value {
        font-weight: 600;
        color: var(--mud-palette-text-primary);
    }

/* ================================
   Stats & Metrics
   ================================ */

.stats-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: 1px solid rgba(102, 126, 234, 0.2);
    transition: all var(--transition-base);
}

    .stats-box:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
        border-color: rgba(102, 126, 234, 0.4);
    }

.stats-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: var(--mud-palette-background-paper);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--mud-palette-divider);
    transition: all var(--transition-base);
}

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

.stats-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--mud-palette-primary);
    margin-bottom: var(--spacing-xs);
}

.stats-label {
    font-size: 0.875rem;
    color: var(--mud-palette-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ================================
   Buttons & Actions
   ================================ */

.btn-gradient {
    background: var(--primary-gradient) !important;
    border: none !important;
    color: white !important;
    transition: all var(--transition-base);
}

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

.btn-glass {
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
}

/* ================================
   Badges & Chips
   ================================ */

.badge-gradient {
    background: var(--primary-gradient);
    color: white;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.chip-modern {
    border-radius: var(--radius-md) !important;
    font-weight: 500 !important;
}

/* ================================
   Loading & Empty States
   ================================ */

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    gap: var(--spacing-lg);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    gap: var(--spacing-md);
    text-align: center;
}

.empty-state-icon {
    font-size: 64px;
    color: var(--mud-palette-text-disabled);
    opacity: 0.5;
}

/* ================================
   Animations
   ================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 0.4s ease;
}

.animate-slide-up {
    animation: slideUp 0.5s ease;
}

.animate-scale-in {
    animation: scaleIn 0.3s ease;
}

/* ================================
   Mobile Optimizations
   ================================ */

@media (max-width: 900px) {
    :root {
        --spacing-xs: 4px;
        --spacing-sm: 6px;
        --spacing-md: 10px;
        --spacing-lg: 12px;
        --spacing-xl: 16px;
        --spacing-2xl: 24px;
    }

    .page-container {
        padding: var(--spacing-md);
    }

    .page-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }

        .page-header .title {
            font-size: 1.5rem;
        }

    /* Mobile Header */
    .mobile-header {
        position: sticky;
        top: 0;
        z-index: 12;
        background: var(--mud-palette-background);
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--mud-palette-divider);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-sm);
        backdrop-filter: blur(8px);
    }

        .mobile-header .title {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            min-width: 0;
            flex: 1;
        }

        .mobile-header .text {
            min-width: 0;
            font-weight: 600;
        }

    /* Mobile Cards */
    .mobile-card {
        margin: var(--spacing-md) var(--spacing-sm);
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
        background: var(--mud-palette-background-paper);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--mud-palette-divider);
        transition: all var(--transition-base);
        animation: fadeInUp 0.4s ease;
    }

        .mobile-card:active {
            transform: scale(0.98);
            box-shadow: var(--shadow-md);
        }

    .mobile-list {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-md);
    }

    /* Product/Item Cards */
    .product-card {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
        background: var(--mud-palette-action-default-hover);
        border: 1px solid var(--mud-palette-divider);
        transition: all var(--transition-fast);
    }

        .product-card:active {
            transform: scale(0.98);
        }

    /* KV Grid for Mobile */
    .kv-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
        margin-top: var(--spacing-md);
    }

    .kv .k {
        font-size: 0.85rem;
        color: var(--mud-palette-text-secondary);
        margin-bottom: 2px;
    }

    .kv .v {
        font-weight: 600;
        color: var(--mud-palette-text-primary);
    }

    /* Sticky Actions (Bottom Bar) */
    .sticky-actions {
        position: sticky;
        bottom: 0;
        z-index: 15;
        background: var(--mud-palette-background);
        padding: var(--spacing-md);
        padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
        border-top: 1px solid var(--mud-palette-divider);
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.05);
        backdrop-filter: blur(8px);
    }

        .sticky-actions.single {
            grid-template-columns: 1fr;
        }

    /* FAB (Floating Action Button) */
    .fab {
        position: fixed;
        right: var(--spacing-lg);
        bottom: calc(76px + env(safe-area-inset-bottom));
        z-index: 20;
        box-shadow: var(--shadow-xl);
        animation: scaleIn 0.3s ease;
    }

        .fab:active {
            transform: scale(0.95);
        }

    /* Mobile Tables Hide */
    .hide-on-mobile {
        display: none !important;
    }

    .show-on-mobile {
        display: block !important;
    }

    /* Section Adjustments */
    .section {
        padding: var(--spacing-lg);
        border-radius: var(--radius-md);
    }

    /* Stats Adjustments */
    .stats-box {
        flex-direction: column;
        text-align: center;
    }

    .stats-value {
        font-size: 1.75rem;
    }
}

/* ================================
   Tablet Optimizations
   ================================ */

@media (min-width: 600px) and (max-width: 900px) {
    .page-container {
        padding: var(--spacing-lg);
    }

    .mobile-card {
        margin: var(--spacing-md);
    }
}

/* ================================
   Extra Small Devices
   ================================ */

@media (max-width: 600px) {
    .page-header .title {
        font-size: 1.25rem;
    }

    .section {
        padding: var(--spacing-md);
    }

    .stats-value {
        font-size: 1.5rem;
    }

    .kv-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================
   Utility Classes
   ================================ */

.cursor-pointer {
    cursor: pointer;
}

.hover-lift {
    transition: transform var(--transition-base);
}

    .hover-lift:hover {
        transform: translateY(-4px);
    }

.no-select {
    user-select: none;
    -webkit-user-select: none;
}

.full-width {
    width: 100%;
}

.text-center {
    text-align: center;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Spacing Utilities */
.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: var(--spacing-xs);
}

.mt-2 {
    margin-top: var(--spacing-sm);
}

.mt-3 {
    margin-top: var(--spacing-md);
}

.mt-4 {
    margin-top: var(--spacing-lg);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--spacing-xs);
}

.mb-2 {
    margin-bottom: var(--spacing-sm);
}

.mb-3 {
    margin-bottom: var(--spacing-md);
}

.mb-4 {
    margin-bottom: var(--spacing-lg);
}

.pt-0 {
    padding-top: 0;
}

.pt-1 {
    padding-top: var(--spacing-xs);
}

.pt-2 {
    padding-top: var(--spacing-sm);
}

.pt-3 {
    padding-top: var(--spacing-md);
}

.pt-4 {
    padding-top: var(--spacing-lg);
}

.pb-0 {
    padding-bottom: 0;
}

.pb-1 {
    padding-bottom: var(--spacing-xs);
}

.pb-2 {
    padding-bottom: var(--spacing-sm);
}

.pb-3 {
    padding-bottom: var(--spacing-md);
}

.pb-4 {
    padding-bottom: var(--spacing-lg);
}

/* ================================
   Dark Mode Support (Optional)
   ================================ */

@media (prefers-color-scheme: dark) {
    :root {
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
        --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.6);
    }
}