/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

html {
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

/* Nav Badge (Bildirim) */
.nav-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 9px;
    background: var(--danger-color);
    color: white;
    font-size: 0.6875rem;
    font-weight: 700;
    line-height: 1;
    margin-left: 4px;
    vertical-align: super;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    font-weight: 500;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

.btn-secondary {
    background: var(--background);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
}

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

/* Auth Section */
.auth-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    padding: 2rem 0;
}

.auth-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.auth-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.auth-tab {
    flex: 1;
    padding: 0.75rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.auth-tab.active {
    background: var(--primary-color);
    color: white;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

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

.form-group input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.auth-error {
    color: var(--danger-color);
    font-size: 0.875rem;
    text-align: center;
    min-height: 1.25rem;
}

/* Suppliers Page Header */
.suppliers-page-header {
    padding: 2rem 0 1rem;
    text-align: center;
}

.suppliers-page-header h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.suppliers-page-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Suppliers Section */
.suppliers-section {
    padding: 1.5rem 0;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Supplier Connect Card */
.supplier-connect-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1rem 1.25rem;
    flex: 1;
    min-width: 280px;
}

.supplier-connect-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.supplier-connect-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.supplier-connect-status {
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
}

.supplier-connect-status-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.supplier-connect-form .form-row {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.supplier-connect-form .form-group {
    flex: 1;
    min-width: 120px;
}

.supplier-connect-form .form-group input {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.supplier-connect-form .form-group label {
    font-size: 0.8125rem;
}

.supplier-error {
    color: var(--danger-color);
    font-size: 0.8125rem;
    margin-top: 0.5rem;
}

.supplier-connected {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.connected-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.status-icon {
    font-size: 1rem;
}

/* Search Section */
.search-section {
    padding: 2rem 0;
    text-align: center;
}

.search-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

.search-input-wrapper {
    display: flex;
    gap: 0.75rem;
    background: var(--surface);
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.search-input-wrapper input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: none;
    font-size: 1rem;
    background: transparent;
}

.search-input-wrapper input:focus {
    outline: none;
}

.search-input-wrapper .btn {
    padding: 0.875rem 2rem;
}

.search-note {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--warning-color);
    text-align: center;
    font-style: italic;
}

/* Spinner */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Results Section */
.results-section {
    padding-bottom: 3rem;
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.results-header h3 {
    font-size: 1.125rem;
}

#searchTermDisplay {
    color: var(--primary-color);
}

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

/* Results Filters */
.results-filters {
    padding: 0.75rem 1rem;
    background: var(--surface);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.filter-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.filter-checkbox input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Sort Control */
.sort-control {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.sort-control select {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
}

.sort-control select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Sortable Table Header */
.sortable {
    cursor: pointer;
    user-select: none;
}

.sortable:hover {
    color: var(--primary-color);
}

.sort-indicator {
    font-size: 0.625rem;
    margin-left: 0.25rem;
    color: var(--primary-color);
}

/* Supplier Error Banner */
.supplier-errors {
    margin-bottom: 0.75rem;
}

.supplier-error-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.15);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.error-supplier-name {
    font-weight: 600;
    color: var(--danger-color);
    white-space: nowrap;
}

.error-message {
    color: var(--text-secondary);
}

/* Unified Table Wrapper */
.unified-table-wrapper {
    background: var(--surface);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
}

/* Supplier Badge (in table rows) */
.supplier-badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.supplier-badge.martas {
    background: rgba(59, 130, 246, 0.1);
    color: #2563eb;
}

.supplier-badge.atak {
    background: rgba(234, 88, 12, 0.1);
    color: #ea580c;
}

/* Out of Stock Row */
tr.out-of-stock {
    opacity: 0.45;
}

tr.out-of-stock:hover {
    opacity: 0.7;
}

/* Empty Table Message */
.empty-table-message {
    text-align: center;
    padding: 2rem !important;
    color: var(--text-secondary);
    font-style: italic;
}

/* Legacy supplier card (kept for compatibility) */
.supplier-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.supplier-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--background);
    border-bottom: 1px solid var(--border-color);
}

.supplier-name {
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.supplier-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.badge-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-color);
}

.badge-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.supplier-products {
    padding: 1rem;
}

/* Product Table */
.product-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.product-table th,
.product-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.product-table th {
    background: var(--background);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-table tr:last-child td {
    border-bottom: none;
}

.product-table tr:hover td {
    background: var(--background);
}

.product-name {
    font-weight: 500;
    color: var(--text-primary);
    max-width: 300px;
}

.product-brand {
    font-weight: 600;
    color: var(--primary-color);
}

.price-cell {
    text-align: right;
}

.price-main {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

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

/* Stock Indicator */
.stock-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.stock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

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

.stock-unavailable {
    background: var(--danger-color);
}

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

/* Stock Badges */
.stock-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.stock-badge {
    font-size: 0.6875rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-color);
}

.stock-badge.unavailable {
    background: rgba(239, 68, 68, 0.05);
    color: var(--text-secondary);
}

/* Campaign Badge */
.campaign-badge {
    display: inline-block;
    background: var(--warning-color);
    color: white;
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-left: 0.5rem;
}

/* OEM Match Indicators */
.oem-exact {
    color: var(--success-color);
    font-weight: 500;
}

.oem-partial {
    color: var(--text-secondary);
}

.oem-match-badge {
    display: inline-block;
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-color);
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-left: 0.375rem;
    vertical-align: middle;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 4rem 2rem;
}

.no-results-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.no-results h3 {
    margin-bottom: 0.5rem;
}

.no-results p {
    color: var(--text-secondary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: 0.75rem;
        border-top: 1px solid var(--border-color);
        margin-top: 0.75rem;
    }

    .suppliers-section {
        flex-direction: column;
    }

    .supplier-connect-card {
        min-width: auto;
    }

    .supplier-connect-form .form-row {
        flex-direction: column;
    }

    .search-input-wrapper {
        flex-direction: column;
    }

    .product-table {
        display: block;
        overflow-x: auto;
    }

    .supplier-products {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: 1.5rem;
    }

    .supplier-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}