/* ==================== Genel Stiller ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

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

/* ==================== Navbar ==================== */
.navbar {
    background-color: var(--surface);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

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

.nav-menu a:hover {
    color: var(--primary-color);
}

.btn-logout {
    color: var(--danger-color) !important;
}

.btn-register {
    background-color: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

/* ==================== Hero Section ==================== */
.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: #475569;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    text-align: center;
}

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

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

/* ==================== Features ==================== */
.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* ==================== CTA Section ==================== */
.cta-section {
    background-color: var(--primary-color);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

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

/* ==================== Auth Pages ==================== */
.auth-page {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.auth-box {
    background: var(--surface);
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
}

.auth-box h1 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    font-weight: 600;
}

/* ==================== Alerts ==================== */
.alert {
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 2px solid var(--success-color);
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 2px solid var(--danger-color);
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 2px solid var(--warning-color);
}

.success-info {
    margin: 1rem 0;
    padding: 1rem;
    background-color: white;
    border-radius: 0.5rem;
}

.success-info code {
    background-color: #f1f5f9;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-family: monospace;
}

.note {
    font-size: 0.875rem;
    font-style: italic;
    margin-top: 0.5rem;
}

/* ==================== Dashboard ==================== */
.dashboard-page {
    padding: 3rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    font-size: 3rem;
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-info p {
    color: var(--text-secondary);
}

.dashboard-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.action-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.action-card h2 {
    margin-bottom: 1rem;
}

.action-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.info-box {
    background: #eff6ff;
    padding: 2rem;
    border-radius: 1rem;
    border: 2px solid var(--primary-color);
    margin-top: 2rem;
}

.info-box ol {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.info-box a {
    color: var(--primary-color);
    font-weight: 600;
}

/* ==================== Products Page ==================== */
.products-page {
    padding: 3rem 0;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.quota-badge {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-weight: 600;
}

.products-controls {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.search-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.search-input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.view-info {
    color: var(--text-secondary);
    text-align: center;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: var(--surface);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-card.selected {
    border: 3px solid var(--success-color);
}

.product-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s;
}

.product-image:hover {
    transform: scale(1.05);
}

.product-no-image {
    width: 100%;
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    background-color: var(--background);
}

.product-info {
    padding: 1rem;
}

.product-name {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-sku {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.product-price {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

.product-actions {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.btn-toggle {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.product-overlay {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--success-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.product-card.selected .product-overlay {
    display: flex;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* ==================== Feed Page ==================== */
.feed-page {
    padding: 3rem 0;
}

.feed-stats {
    margin: 2rem 0;
}

.feed-info-box {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.feed-info-box h2 {
    margin-bottom: 1rem;
}

.feed-url-box {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
}

.feed-url-input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: monospace;
}

.api-key-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: #f8fafc;
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

.api-key-box code {
    flex: 1;
    background: white;
    padding: 0.5rem;
    border-radius: 0.25rem;
    font-family: monospace;
    word-break: break-all;
}

.feed-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.feed-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 2rem 0;
}

.feed-help {
    background: #eff6ff;
    padding: 2rem;
    border-radius: 1rem;
    margin-top: 2rem;
}

.feed-help h3 {
    margin-bottom: 1rem;
}

.feed-help ol {
    margin-left: 1.5rem;
}

.feed-help li {
    margin-bottom: 0.5rem;
}

/* ==================== Error Pages ==================== */
.error-page {
    text-align: center;
    padding: 6rem 2rem;
}

.error-page h1 {
    font-size: 6rem;
    margin-bottom: 1rem;
}

.error-page h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.error-page p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* ==================== Footer ==================== */
.footer {
    background-color: var(--surface);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* ==================== Main Content ==================== */
.main-content {
    min-height: calc(100vh - 200px);
}

/* ==================== Image Gallery Modal ==================== */
.image-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
}

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

.image-modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.image-modal-main {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 0.5rem;
}

.image-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 3rem;
    font-weight: bold;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    line-height: 1;
}

.image-modal-close:hover {
    color: #ddd;
}

.image-modal-nav {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.image-modal-nav button {
    background-color: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.image-modal-nav button:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.image-modal-nav button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.image-thumbnails {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    max-width: 100%;
    padding: 0.5rem;
}

.image-thumbnail {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 0.25rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
    border: 2px solid transparent;
}

.image-thumbnail:hover {
    opacity: 1;
}

.image-thumbnail.active {
    opacity: 1;
    border-color: white;
}

.image-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        gap: 0.5rem;
        font-size: 0.875rem;
    }
    
    .page-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .feed-url-box {
        flex-direction: column;
    }
    
    .feed-actions {
        flex-direction: column;
    }
}