:root {
    --primary-color: #3498db;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #9b59b6;
    --secondary-color: #95a5a6;

    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: #e1e8ed;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;

    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.maintenance-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.maintenance-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    background: var(--card-bg);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.header-title h1 {
    color: var(--text-primary);
    margin-bottom: 5px;
    font-size: 1.8rem;
}

.header-title p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.header-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Button Styles */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-warning {
    background: var(--warning-color);
    color: white;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-info {
    background: var(--info-color);
    color: white;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border-radius: 50%;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Controls Section */
.controls-section {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    flex-wrap: wrap;
    align-items: center;
}

.search-input {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    width: 300px;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.filter-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-select {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    background: white;
    cursor: pointer;
}

/* Groups Section */
.groups-section {
    margin-bottom: 25px;
}

.groups-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.groups-container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.group-tag {
    background: var(--primary-color);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.group-tag:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* Table Styles */
.table-container {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 25px;
    overflow-x: auto;
}

.maintenance-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.maintenance-table th,
.maintenance-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.maintenance-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.maintenance-table tbody tr {
    transition: background-color 0.3s ease;
}

.maintenance-table tbody tr:hover {
    background: #f8f9fa;
}

/* Status Indicators */
.status-badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}

.status-good {
    background: #d5f4e6;
    color: #27ae60;
}

.status-warning {
    background: #fef5e7;
    color: #f39c12;
}

.status-critical {
    background: #fde8e6;
    color: #e74c3c;
}

/* Progress Bars */
.progress-bar {
    width: 100%;
    height: 8px;
    background: #ecf0f1;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 5px;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-good {
    background: var(--success-color);
}

.progress-warning {
    background: var(--warning-color);
}

.progress-critical {
    background: var(--danger-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }

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

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--danger-color);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
    padding: 0 25px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    padding: 0 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-control:read-only {
    background: #f8f9fa;
    color: var(--text-secondary);
}

.form-actions {
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Group Manager */
.group-manager {
    padding: 25px;
}

.group-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.group-form input {
    flex: 1;
}

.groups-list {
    max-height: 300px;
    overflow-y: auto;
}

.group-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 10px;
    background: #f8f9fa;
}

.group-actions {
    display: flex;
    gap: 5px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination button {
    padding: 8px 15px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 44px;
    min-height: 44px;
}

.pagination button:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination .active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Action Buttons in Table */
.action-buttons {
    display: flex;
    gap: 5px;
}

.action-btn {
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn.edit {
    background: var(--warning-color);
    color: white;
}

.action-btn.delete {
    background: var(--danger-color);
    color: white;
}

.action-btn:hover {
    transform: scale(1.05);
}

/* Checkbox Styles */
input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    min-width: 20px;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* ===== MOBILE RESPONSIVE STYLES ===== */

/* Large tablets and small desktops */
@media (max-width: 1024px) {
    .maintenance-container {
        padding: 15px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .maintenance-table {
        font-size: 0.85rem;
    }
}

/* Tablets */
@media (max-width: 768px) {
    .maintenance-header {
        flex-direction: column;
        gap: 15px;
        padding: 20px;
        text-align: center;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
    }

    .controls-section {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .search-input {
        width: 100%;
    }

    .filter-controls {
        justify-content: center;
        width: 100%;
    }

    .filter-select {
        flex: 1;
        min-width: 120px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }

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

    .stat-card {
        padding: 15px;
    }

    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }

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

    .maintenance-table th,
    .maintenance-table td {
        padding: 10px 8px;
        font-size: 0.8rem;
    }

    .action-buttons {
        flex-direction: column;
        gap: 5px;
    }

    .action-btn {
        padding: 6px 8px;
        font-size: 0.75rem;
    }

    .pagination-container {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

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

    .pagination {
        justify-content: center;
    }

    .table-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .bulk-actions-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .bulk-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .groups-container {
        justify-content: center;
    }

    .modal-content {
        width: 95%;
        margin: 10px;
    }

    .modal-header {
        padding: 15px 20px;
    }

    .form-group {
        padding: 0 20px;
    }

    .form-actions {
        padding: 15px 20px;
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: 12px 15px;
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    .maintenance-container {
        padding: 10px;
    }

    .maintenance-header {
        padding: 15px;
        margin-bottom: 20px;
    }

    .header-title h1 {
        font-size: 1.5rem;
    }

    .header-title p {
        font-size: 0.85rem;
    }

    .stats-grid {
        gap: 10px;
    }

    .stat-card {
        padding: 12px;
        gap: 10px;
    }

    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }

    .stat-value {
        font-size: 1.3rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .controls-section {
        margin-bottom: 20px;
    }

    .filter-controls {
        flex-direction: column;
        gap: 8px;
    }

    .filter-select {
        width: 100%;
    }

    .search-input {
        font-size: 16px;
        /* Prevents zoom on iOS */
    }

    .maintenance-table {
        min-width: 600px;
    }

    .maintenance-table th,
    .maintenance-table td {
        padding: 8px 5px;
        font-size: 0.75rem;
    }

    .status-badge {
        font-size: 0.7rem;
        padding: 4px 8px;
    }

    .group-tag {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .pagination button {
        padding: 6px 10px;
        min-width: 40px;
        min-height: 40px;
        font-size: 0.8rem;
    }

    .page-size-select {
        padding: 8px;
        font-size: 14px;
    }

    /* Ensure touch targets are at least 44px */
    .btn,
    .action-btn,
    .pagination button,
    input[type="checkbox"] {
        min-height: 44px;
    }

    .action-btn {
        min-width: 44px;
    }

    /* Modal improvements for mobile */
    .modal-content {
        width: 98%;
        margin: 5px;
    }

    .modal-header h3 {
        font-size: 1.2rem;
    }

    .form-control {
        padding: 14px 12px;
        font-size: 16px;
        /* Prevents zoom on iOS */
    }
}

/* Very small phones */
@media (max-width: 360px) {
    .maintenance-container {
        padding: 5px;
    }

    .maintenance-header {
        padding: 12px;
    }

    .header-title h1 {
        font-size: 1.3rem;
    }

    .btn {
        padding: 10px 12px;
        font-size: 0.8rem;
    }

    .stat-value {
        font-size: 1.2rem;
    }

    .pagination {
        gap: 5px;
    }

    .pagination button {
        padding: 5px 8px;
        min-width: 36px;
        min-height: 36px;
        font-size: 0.75rem;
    }
}

/* Landscape orientation for mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .modal-content {
        max-height: 80vh;
    }

    .groups-list {
        max-height: 200px;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {
    .stat-icon {
        font-size: 2.2rem;
    }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== ENHANCED GROUP MANAGEMENT STYLES (MySQL Integration) ===== */

/* Group Tags with Database Status */
.group-tag.active {
    background: var(--success-color);
}

.group-tag .vehicle-count {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: bold;
}

/* Group Manager Modal Styles */
.group-manager {
    padding: 20px 25px;
}

.group-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 6px;
}

.group-form input {
    flex: 1;
}

.groups-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 10px 0;
}

.group-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    background: var(--bg-color);
    border-radius: 6px;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.group-item:hover {
    background: #f0f3f6;
    transform: translateX(5px);
    border-left-color: var(--primary-color);
}

.group-info h4 {
    margin: 0 0 5px 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.group-count {
    color: white;
    font-size: 0.85rem;
    opacity: 0.95;
}

.no-groups {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.no-groups-icon {
    font-size: 3rem;
    margin-bottom: 10px;
    opacity: 0.5;
}

/* Group Badge in Table */
.group-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    background: var(--primary-color);
    color: white;
}

.text-muted {
    color: var(--text-secondary);
    font-style: italic;
}

/* Selected Row for Bulk Operations */
.maintenance-table tbody tr.selected {
    background: #e3f2fd;
    border-left: 3px solid var(--primary-color);
}

/* Bulk Actions Bar */
.bulk-actions {
    background: var(--info-color);
    color: white;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: none;
    animation: slideDown 0.3s ease;
}

.bulk-actions.show {
    display: block;
}

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

.bulk-buttons {
    display: flex;
    gap: 10px;
}

/* Notification System */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 6px;
    color: white;
    font-weight: 500;
    z-index: 10001;
    animation: slideInNotification 0.3s ease;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.notification.notification-success {
    background: var(--success-color);
}

.notification.notification-error {
    background: var(--danger-color);
}

.notification.notification-info {
    background: var(--primary-color);
}

@keyframes slideInNotification {
    from {
        transform: translateX(400px);
    }

    to {
        transform: translateX(0);
    }
}

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

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

/* Vehicle Info in Table */
.vehicle-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.vehicle-info strong {
    color: var(--text-primary);
    font-size: 0.9rem;
}

.vehicle-info small {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Maintenance Progress Bars */
.maintenance-progress {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 120px;
}

.progress-value {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    transition: width 0.3s ease, background-color 0.3s ease;
    border-radius: 4px;
}

.progress-bar.good {
    background-color: #10b981;
}

.progress-bar.warning {
    background-color: #f59e0b;
}

.progress-bar.critical {
    background-color: #ef4444;
}

.progress-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.progress-text.good {
    color: #10b981;
}

.progress-text.warning {
    color: #f59e0b;
}

.progress-text.critical {
    color: #ef4444;
}