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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* Login Screen Styles */
.login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
    text-align: center;
    animation: loginSlideIn 0.5s ease;
}

@keyframes loginSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-header {
    margin-bottom: 30px;
}

.login-header i {
    font-size: 4rem;
    color: #3498db;
    margin-bottom: 15px;
    display: block;
}

.login-header h1 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.login-header p {
    color: #666;
    font-size: 1rem;
}

.login-form {
    text-align: left;
}

.login-form .form-group {
    margin-bottom: 25px;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.9rem;
}

.input-group {
    position: relative;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 1rem;
}

.input-group input {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 2px solid #ddd;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.input-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
    background: white;
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 1rem;
    padding: 5px;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: #3498db;
}

.login-btn {
    width: 100%;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    padding: 15px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    margin-top: 10px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.login-btn:active {
    transform: translateY(0);
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    padding: 12px 15px;
    border-radius: 8px;
    margin-top: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    animation: errorShake 0.5s ease;
}

@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.login-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.login-footer p {
    color: #999;
    font-size: 0.9rem;
}

/* Main App Styles */
.main-app {
    display: none;
}

/* User Info in Navigation */
.user-info {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 8px;
    margin-right: 10px;
    color: #2c3e50;
    font-weight: 500;
}

.user-info i {
    margin-right: 8px;
    color: #3498db;
}

.logout-btn {
    background: linear-gradient(135deg, #e74c3c, #c0392b) !important;
    color: white !important;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3) !important;
}

.logout-btn:hover {
    background: linear-gradient(135deg, #c0392b, #a93226) !important;
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4) !important;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 25px 30px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.header h1 {
    color: #2c3e50;
    font-size: 2.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 15px;
}

.header h1 i {
    color: #e74c3c;
    font-size: 2.5rem;
}

.header-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    min-width: 100px;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.stat-item:nth-child(2) {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.stat-item:nth-child(3) {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.8rem;
    opacity: 0.9;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 10px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}

.nav-tab {
    background: none;
    border: none;
    padding: 15px 25px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.nav-tab:hover {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

.nav-tab.active {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

/* Main Content */
.main-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    min-height: 500px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Dashboard Styles */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.dashboard-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.dashboard-card h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    margin-top: 10px;
}

.stat-item {
    text-align: center;
    padding: 15px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-2px);
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.action-btn {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
    border: none;
    padding: 15px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(39, 174, 96, 0.4);
}

.sales-chart, .vehicles-list {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 10px;
    border: 2px dashed #ddd;
}

.chart-placeholder {
    text-align: center;
    color: #999;
}

.chart-placeholder i {
    font-size: 3rem;
    margin-bottom: 10px;
    display: block;
}

.vehicles-list {
    flex-direction: column;
    gap: 10px;
    padding: 15px;
    overflow-y: auto;
}

.vehicle-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.vehicle-item.scrap {
    border-left-color: #e74c3c;
    background: #fdf2f2;
}

.vehicle-info {
    flex: 1;
}

.vehicle-name {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
}

.vehicle-details {
    font-size: 0.9rem;
    color: #666;
}

.vehicle-actions {
    display: flex;
    gap: 8px;
}

/* Vehicles Styles */
.vehicles-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.vehicles-header h2 {
    color: #2c3e50;
    font-size: 1.8rem;
}

.search-filter {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    min-width: 250px;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

.search-box input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: #3498db;
}

#brandFilter, #statusFilter {
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    min-width: 150px;
}

/* Vehicles Grid */
.vehicles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.vehicle-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.vehicle-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #3498db;
}

.vehicle-card.scrap {
    border-color: #e74c3c;
    background: linear-gradient(135deg, #fdf2f2, #fce4ec);
}

.vehicle-photo {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.vehicle-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.vehicle-photo .photo-placeholder {
    text-align: center;
    color: #999;
}

.vehicle-photo .photo-placeholder i {
    font-size: 3rem;
    margin-bottom: 10px;
    display: block;
}

.vehicle-content {
    padding: 20px;
}

.vehicle-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.vehicle-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.vehicle-status.active {
    background: #d4edda;
    color: #155724;
}

.vehicle-status.scrap {
    background: #f8d7da;
    color: #721c24;
}

.vehicle-details {
    margin-bottom: 15px;
}

.vehicle-detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.vehicle-detail-label {
    color: #666;
    font-weight: 500;
}

.vehicle-detail-value {
    color: #2c3e50;
    font-weight: 600;
}

.vehicle-sales {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 15px;
    text-align: center;
}

.vehicle-sales-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: #27ae60;
    margin-bottom: 5px;
}

.vehicle-sales-label {
    font-size: 0.9rem;
    color: #666;
}

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

.vehicle-btn {
    flex: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.vehicle-btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
}

.vehicle-btn-primary:hover {
    background: linear-gradient(135deg, #2980b9, #1f618d);
}

.vehicle-btn-secondary {
    background: #95a5a6;
    color: white;
}

.vehicle-btn-secondary:hover {
    background: #7f8c8d;
}

.vehicle-btn-danger {
    background: #e74c3c;
    color: white;
}

.vehicle-btn-danger:hover {
    background: #c0392b;
}

.vehicle-btn-success {
    background: #27ae60;
    color: white;
}

.vehicle-btn-success:hover {
    background: #229954;
}

.products-table-container {
    overflow-x: auto;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.products-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

.products-table th {
    background: linear-gradient(135deg, #34495e, #2c3e50);
    color: white;
    padding: 15px 12px;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.products-table td {
    padding: 15px 12px;
    border-bottom: 1px solid #eee;
    font-size: 0.9rem;
}

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

.stock-status {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-align: center;
}

.stock-status.in-stock {
    background: #d4edda;
    color: #155724;
}

.stock-status.low-stock {
    background: #fff3cd;
    color: #856404;
}

.stock-status.out-of-stock {
    background: #f8d7da;
    color: #721c24;
}

.action-buttons {
    display: flex;
    gap: 8px;
}

.btn-small {
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.btn-edit {
    background: #3498db;
    color: white;
}

.btn-edit:hover {
    background: #2980b9;
}

.btn-delete {
    background: #e74c3c;
    color: white;
}

.btn-delete:hover {
    background: #c0392b;
}

/* Form Styles */
.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.form-container h2 {
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.vehicle-form {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Photo Upload */
.photo-upload {
    position: relative;
    margin-bottom: 20px;
}

.photo-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.photo-preview {
    width: 100%;
    height: 200px;
    border: 2px dashed #ddd;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    transition: all 0.3s ease;
    cursor: pointer;
}

.photo-preview:hover {
    border-color: #3498db;
    background: #e3f2fd;
}

.photo-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.photo-preview i {
    font-size: 3rem;
    color: #999;
    margin-bottom: 10px;
}

.photo-preview p {
    color: #666;
    font-size: 1rem;
}

/* QR Scanner */
.scanner-container {
    text-align: center;
    padding: 20px;
}

.scanner-box {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.scanner-info {
    background: #e3f2fd;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
}

.scanner-info p {
    margin: 10px 0;
    color: #1976d2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* QR Code */
.qr-container {
    text-align: center;
    padding: 20px;
}

.qr-container #qrCode {
    margin: 20px 0;
    display: flex;
    justify-content: center;
    min-height: 220px;
    align-items: center;
}

.qr-container #qrCode canvas {
    border: 2px solid #eee;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.qr-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

/* Parts Management */
.parts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #eee;
}

.parts-header h4 {
    color: #2c3e50;
    margin: 0;
}

.add-part-form {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.parts-list {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.part-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: white;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.part-info {
    flex: 1;
}

.part-name {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
}

.part-description {
    font-size: 0.9rem;
    color: #666;
}

.part-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: #27ae60;
    margin-right: 15px;
}

.part-actions {
    display: flex;
    gap: 8px;
}

.parts-summary {
    display: flex;
    justify-content: space-around;
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
}

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

.summary-item span:first-child {
    display: block;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.summary-item span:last-child {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
}

/* Export Actions */
.export-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #eee;
}

/* Modal Large */
.modal-content.large {
    max-width: 900px;
    width: 95%;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

/* Reports Styles */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.report-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.report-card h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.report-content {
    background: white;
    padding: 20px;
    border-radius: 10px;
    min-height: 150px;
}

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

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    background: linear-gradient(135deg, #34495e, #2c3e50);
    color: white;
    padding: 20px 30px;
    border-radius: 15px 15px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.close {
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #e74c3c;
}

.modal-body {
    padding: 30px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .header-stats {
        justify-content: center;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .search-filter {
        flex-direction: column;
        width: 100%;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .products-table-container {
        font-size: 0.8rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .stat-item {
        padding: 10px 15px;
        min-width: 100px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .nav-tab {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .main-content {
        padding: 20px;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Success/Error Messages */
.message {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
    color: #ddd;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: #666;
}

.empty-state p {
    font-size: 1.1rem;
}