/* Vehicle Management System - Main Stylesheet */

/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --success-color: #16a34a;
    --warning-color: #ca8a04;

    /* Status Colors */
    --active-color: #16a34a;
    --active-bg: #dcfce7;
    --maintenance-color: #ca8a04;
    --maintenance-bg: #fef9c3;
    --retired-color: #6b7280;
    --retired-bg: #f3f4f6;

    /* Background Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-header: #1e293b;

    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;

    /* Border Colors */
    --border-color: #e2e8f0;
    --border-focus: #2563eb;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.required {
    color: var(--danger-color);
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.app-header {
    background: linear-gradient(135deg, var(--bg-header) 0%, #334155 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

.btn-icon {
    font-size: 1.25rem;
    font-weight: bold;
}

.btn-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    width: 100%;
}

/* Dashboard Section */
.dashboard-section {
    margin-bottom: var(--spacing-xl);
}

.dashboard-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.stat-icon {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.stat-total .stat-icon {
    background-color: #dbeafe;
}

.stat-active .stat-icon {
    background-color: var(--active-bg);
}

.stat-maintenance .stat-icon {
    background-color: var(--maintenance-bg);
}

.stat-retired .stat-icon {
    background-color: var(--retired-bg);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Vehicles Section */
.vehicles-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.filters {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.filter-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.filter-group select,
.filter-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    min-width: 150px;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Loading Indicator */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Error Message */
.error-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-md);
    color: var(--danger-color);
}

.error-icon {
    font-size: 1.5rem;
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

.vehicles-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.vehicles-table th,
.vehicles-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.vehicles-table th {
    background-color: var(--bg-primary);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.vehicles-table tbody tr {
    transition: background-color var(--transition-fast);
}

.vehicles-table tbody tr:hover {
    background-color: #f1f5f9;
}

.vehicles-table td {
    vertical-align: middle;
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: capitalize;
}

.status-badge.active {
    background-color: var(--active-bg);
    color: var(--active-color);
}

.status-badge.maintenance {
    background-color: var(--maintenance-bg);
    color: var(--maintenance-color);
}

.status-badge.retired {
    background-color: var(--retired-bg);
    color: var(--retired-color);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.action-btn {
    padding: var(--spacing-xs);
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.action-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.action-btn.edit-btn:hover {
    color: var(--primary-color);
}

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

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

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Pagination */
.pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.page-info {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.2s ease;
}

.modal-small {
    max-width: 400px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* Form Styles */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input.error,
.form-group select.error {
    border-color: var(--danger-color);
}

.error-text {
    font-size: 0.75rem;
    color: var(--danger-color);
    min-height: 1rem;
}

/* Delete Modal */
.delete-vehicle-info {
    background-color: var(--bg-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    margin: var(--spacing-md) 0;
}

.warning-text {
    color: var(--danger-color);
    font-size: 0.875rem;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: toastSlideIn 0.3s ease;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    font-size: 0.875rem;
    font-weight: 500;
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

/* Footer Styles */
.app-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
    }

    .filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group select,
    .filter-group input {
        width: 100%;
    }

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

    .pagination {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .pagination-controls {
        justify-content: center;
    }

    .vehicles-table th,
    .vehicles-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }

    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
}

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

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

    .modal-content {
        margin: var(--spacing-sm);
    }

    .action-buttons {
        flex-direction: column;
    }
}