:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --accent: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

.product-card {
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.product-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding: 40px;
}

.product-gallery {
    position: relative;
}

.main-image {
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 16px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition);
}

.thumbnails {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.thumbnail {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    background: #f8fafc;
}

.thumbnail:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.thumbnail.active {
    border-color: var(--primary);
    transform: scale(1.05);
}

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

.product-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.product-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 24px;
}

.product-badge {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-title {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.product-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 16px;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.rating-stars {
    color: var(--accent);
    display: flex;
    gap: 2px;
}

.rating-text {
    color: var(--text-secondary);
    font-size: 14px;
}

.rating-text a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.price-section {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.current-price {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.old-price {
    font-size: 20px;
    color: var(--text-secondary);
    text-decoration: line-through;
}

.availability {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: #dcfce7;
    color: #166534;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 14px;
}

.availability::before {
    content: "✓";
    font-weight: bold;
}

.actions-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.primary-actions {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
    padding: 14px 24px;
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.action-icons {
    display: flex;
    gap: 12px;
}

.icon-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--background);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid var(--border);
    color: var(--text-secondary);
}

.icon-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 8px;
}

.feature-item {
    background: var(--background);
    padding: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.feature-name {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.feature-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.product-tabs {
    margin-top: 8px;
}

.tabs-header {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    padding: 0 40px;
}

.tab {
    padding: 20px 32px;
    cursor: pointer;
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    color: var(--text-secondary);
    position: relative;
}

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

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    padding: 40px;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

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

.description-text {
    line-height: 1.8;
    color: var(--text-primary);
}

.description-text p {
    margin-bottom: 16px;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.spec-name {
    color: var(--text-secondary);
}

.spec-value {
    font-weight: 500;
}

.delivery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.delivery-card {
    background: var(--background);
    padding: 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.delivery-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.delivery-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 16px;
    font-weight: bold;
}

.delivery-title {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 18px;
}

.delivery-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* Стили для системы отзывов */
.reviews-section {
    max-width: 800px;
}

.reviews-stats {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 40px;
    margin-bottom: 40px;
    padding: 24px;
    background: var(--background);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.rating-overview {
    text-align: center;
}

.average-rating {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.rating-breakdown {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rating-bar {
    display: flex;
    align-items: center;
    gap: 12px;
}

.bar {
    flex: 1;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.add-review-btn {
    margin-bottom: 30px;
}

.review-form {
    background: var(--background);
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 40px;
    display: none;
}

.review-form.active {
    display: block;
    animation: slideDown 0.3s ease;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input, .form-textarea, .form-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: var(--transition);
    background: var(--surface);
}

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

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.star-rating {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.star {
    font-size: 32px;
    color: #ddd;
    cursor: pointer;
    transition: var(--transition);
}

.star:hover, .star.active {
    color: var(--accent);
    transform: scale(1.1);
}

.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.review-item {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.review-item:hover {
    box-shadow: var(--shadow);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.review-author {
    font-weight: 600;
    color: var(--text-primary);
}

.review-date {
    color: var(--text-secondary);
    font-size: 14px;
}

.review-rating {
    color: var(--accent);
    margin-bottom: 12px;
}

.review-text {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.review-response {
    background: #f0f9ff;
    padding: 20px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary);
    margin-top: 16px;
}

.response-header {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.no-reviews {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.loading {
    opacity: 0.7;
    pointer-events: none;
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-weight: 500;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fee2e2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

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

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

/* Адаптивность */
@media (max-width: 1024px) {
    .product-main {
        gap: 32px;
        padding: 32px;
    }
    
    .tab-content {
        padding: 32px;
    }
    
    .reviews-stats {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .product-main {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 24px;
    }
    
    .product-title {
        font-size: 24px;
    }
    
    .current-price {
        font-size: 28px;
    }
    
    .primary-actions {
        flex-direction: column;
    }
    
    .tabs-header {
        padding: 0 24px;
        flex-wrap: wrap;
    }
    
    .tab {
        padding: 16px 20px;
        flex: 1;
        min-width: 120px;
        text-align: center;
    }
    
    .tab-content {
        padding: 24px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .review-header {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .product-main {
        padding: 20px;
    }
    
    .product-title {
        font-size: 20px;
    }
    
    .current-price {
        font-size: 24px;
    }
    
    .tabs-header {
        padding: 0 20px;
    }
    
    .tab {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .tab-content {
        padding: 20px;
    }
    
    .btn {
        padding: 14px 20px;
        font-size: 14px;
    }
    
    .review-form {
        padding: 20px;
    }
}

/* Убираем точки у всех списков */
ul {
    list-style: none;
}