/* Reset e base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    padding-bottom: 80px;
}

/* Header */
.app-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content h1 {
    color: #2196F3;
    font-size: 1.5rem;
    font-weight: 600;
}

.header-content h1 i {
    margin-right: 0.5rem;
}

.header-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: #666;
}

.header-stats span {
    background: rgba(33, 150, 243, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
}

/* Main content */
.app-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

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

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

/* Dashboard Cards */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.summary-card {
    border-left: 5px solid #2196F3;
}

.recent-items-card {
    border-left: 5px solid #4CAF50;
}

.card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2196F3, #21CBF3);
    border-radius: 12px;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.card h3 {
    color: #333;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2196F3;
}

/* Recent Items */
.recent-items {
    max-height: 200px;
    overflow-y: auto;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid #eee;
}

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

.recent-item-image {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    object-fit: cover;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
}

.recent-item-info h4 {
    font-size: 0.9rem;
    color: #333;
    margin-bottom: 0.25rem;
}

.recent-item-info p {
    font-size: 0.8rem;
    color: #666;
}

.empty-state {
    text-align: center;
    color: #999;
    font-style: italic;
    padding: 2rem 0;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #2196F3, #21CBF3);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1976D2, #00BCD4);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, #757575, #9E9E9E);
    color: white;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #616161, #757575);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(117, 117, 117, 0.3);
}

.btn-accent {
    background: linear-gradient(135deg, #FFC107, #FF9800);
    color: white;
}

.btn-accent:hover {
    background: linear-gradient(135deg, #FFB300, #F57C00);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #4CAF50, #8BC34A);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #388E3C, #689F38);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #F44336, #E91E63);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #D32F2F, #C2185B);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(244, 67, 54, 0.3);
}

/* Forms */
.item-form {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2196F3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Photo and Receipt Sections */
.photo-section,
.receipt-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.photo-section h3,
.receipt-section h3 {
    color: #333;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.photo-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.photo-preview,
.receipt-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.photo-item,
.receipt-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.photo-item img,
.receipt-item img {
    width: 100%;
    height: 100px;
    object-fit: cover;
}

.photo-remove,
.receipt-remove {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(244, 67, 54, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 25px;
    height: 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* Inventory */
.inventory-header {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.inventory-header h2 {
    color: #333;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.inventory-controls {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 1rem;
    align-items: center;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 1rem;
}

.search-box i {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

.inventory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.inventory-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.inventory-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.inventory-item-image {
    width: 100%;
    height: 200px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 3rem;
    overflow: hidden;
}

.inventory-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.inventory-item-content {
    padding: 1.5rem;
}

.inventory-item h3 {
    color: #333;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.inventory-item-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
}

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

.meta-value {
    color: #333;
    font-weight: 600;
}

.category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(33, 150, 243, 0.1);
    color: #2196F3;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: capitalize;
}

.empty-inventory {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: #666;
}

.empty-inventory i {
    font-size: 4rem;
    color: #ddd;
    margin-bottom: 1rem;
}

.empty-inventory h3 {
    margin-bottom: 0.5rem;
    color: #999;
}

/* Reports */
.report-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.report-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.report-card h3 {
    color: #333;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.report-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.report-content {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
}

/* FAQ */
.faq-container {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.faq-item {
    border-bottom: 1px solid #eee;
}

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

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question[aria-expanded="true"] {
    background-color: #f0f8ff;
    color: #2196F3;
}

.faq-icon {
    font-size: 1.2rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #666;
    line-height: 1.6;
    animation: slideDown 0.3s ease-out;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 15px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-50px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: #333;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: 1.5rem;
}

.modal-actions {
    padding: 1.5rem;
    border-top: 1px solid #eee;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Camera Modal */
.camera-modal-content {
    max-width: 500px;
}

#camera-video {
    width: 100%;
    height: 300px;
    background: #000;
    border-radius: 10px;
    object-fit: cover;
}

.camera-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: 0.75rem 0;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    text-decoration: none;
    color: #666;
    transition: color 0.3s ease, transform 0.3s ease;
    padding: 0.5rem;
    border-radius: 10px;
    min-width: 60px;
}

.nav-item:hover {
    color: #2196F3;
    transform: translateY(-2px);
}

.nav-item.active {
    color: #2196F3;
    background: rgba(33, 150, 243, 0.1);
}

.nav-item i {
    font-size: 1.2rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 600;
}

/* Footer */
footer {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    text-align: center;
    padding: 1rem;
    margin-top: 3rem;
    color: white;
    font-size: 0.9rem;
}

footer a {
    color: #FFC107;
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-main {
        padding: 0.5rem;
    }
    
    .header-content {
        padding: 0 0.5rem;
    }
    
    .header-content h1 {
        font-size: 1.2rem;
    }
    
    .header-stats {
        flex-direction: column;
        align-items: flex-end;
        gap: 0.25rem;
    }
    
    .dashboard-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .inventory-controls {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .inventory-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .photo-controls {
        flex-direction: column;
    }
    
    .quick-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .modal-content {
        margin: 1rem;
        max-height: calc(100vh - 2rem);
    }
    
    .report-options {
        grid-template-columns: 1fr;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .item-form {
        padding: 1rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .summary-stats {
        grid-template-columns: 1fr;
    }
    
    .inventory-item-meta {
        grid-template-columns: 1fr;
    }
    
    .nav-item span {
        font-size: 0.6rem;
    }
    
    .nav-item i {
        font-size: 1rem;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .bottom-nav,
    .app-header,
    .modal,
    .btn {
        display: none !important;
    }
    
    .content-section {
        display: block !important;
    }
    
    .inventory-item {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
        margin-bottom: 1rem;
    }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .card {
        border: 1px solid #333;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        border: 2px solid #333;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        color: #e0e0e0;
    }
    
    .card,
    .item-form,
    .modal-content,
    .inventory-header,
    .faq-container {
        background: #2a2a3e;
        color: #e0e0e0;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        background: #3a3a4e;
        border-color: #4a4a5e;
        color: #e0e0e0;
    }
    
    .app-header,
    .bottom-nav {
        background: rgba(42, 42, 62, 0.95);
    }
    
    .nav-item {
        color: #b0b0b0;
    }
    
    .nav-item.active {
        color: #64B5F6;
        background: rgba(100, 181, 246, 0.1);
    }
}