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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background: #f5f7fa;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-box h1 {
    font-size: 28px;
    margin-bottom: 8px;
    color: #667eea;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

.auth-form h2 {
    font-size: 22px;
    margin-bottom: 20px;
    color: #333;
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.toggle-form {
    text-align: center;
    margin-top: 20px;
    color: #666;
}

.toggle-form a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 6px;
    margin-top: 15px;
    text-align: center;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
}

.btn-danger {
    background: #f56565;
    color: white;
}

.btn-danger:hover {
    background: #e53e3e;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: #2d3748;
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
    font-size: 20px;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #cbd5e0;
    text-decoration: none;
    transition: all 0.2s;
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
    color: white;
}

.nav-item.active {
    background: rgba(102, 126, 234, 0.2);
    color: white;
    border-left: 3px solid #667eea;
}

.nav-item .icon {
    margin-right: 12px;
    font-size: 18px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
    margin-bottom: 12px;
    padding: 8px;
    background: rgba(255,255,255,0.05);
    border-radius: 6px;
    font-size: 13px;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 30px;
    max-width: 1400px;
}

.page-header {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 600;
    color: #2d3748;
}

.page-header p {
    color: #718096;
    margin-top: 4px;
}

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.kpi-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.kpi-label {
    font-size: 13px;
    color: #718096;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-icon {
    font-size: 24px;
}

.kpi-value {
    font-size: 32px;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 4px;
}

.kpi-value.profit {
    color: #48bb78;
}

.kpi-subtitle {
    font-size: 12px;
    color: #a0aec0;
}

/* Controls */
.controls {
    margin-bottom: 30px;
    display: flex;
    gap: 12px;
}

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.chart-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.chart-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: #2d3748;
}

.time-range-selector button {
    padding: 6px 12px;
    border: 1px solid #e2e8f0;
    background: white;
    color: #4a5568;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    margin-left: 4px;
    transition: all 0.2s;
}

.time-range-selector button:hover {
    background: #f7fafc;
}

.time-range-selector button.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* Filters Bar */
.filters-bar {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.filters-bar input,
.filters-bar select {
    flex: 1;
    min-width: 150px;
}

/* Inventory Grid */
.inventory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.inventory-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.item-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #f7fafc;
}

.item-content {
    padding: 16px;
}

.item-title {
    font-size: 16px;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 8px;
}

.item-meta {
    font-size: 13px;
    color: #718096;
    margin-bottom: 12px;
}

.item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid #e2e8f0;
}

.item-price {
    font-size: 18px;
    font-weight: 700;
    color: #667eea;
}

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

.item-actions button {
    padding: 6px 12px;
    font-size: 12px;
}

.status-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-draft {
    background: #e2e8f0;
    color: #4a5568;
}

.status-listed {
    background: #bee3f8;
    color: #2c5282;
}

.status-sold {
    background: #c6f6d5;
    color: #22543d;
}

.platform-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
    margin-right: 8px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    overflow-y: auto;
}

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

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    margin: 20px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid #e2e8f0;
}

.modal-header h2 {
    font-size: 22px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    color: #a0aec0;
    cursor: pointer;
}

.modal-content form {
    padding: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 24px;
    border-top: 1px solid #e2e8f0;
}

.photo-preview {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 12px;
}

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

/* Table */
.data-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.data-table table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background: #f7fafc;
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: #4a5568;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 16px;
    border-top: 1px solid #e2e8f0;
    color: #2d3748;
}

.data-table tr:hover {
    background: #f7fafc;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: #a0aec0;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
        padding: 20px;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }
    
    .main-content {
        margin-left: 0;
    }
}