/* Book Review Styles */
.book-detail-tabs {
    display: flex;
    margin: 20px 0;
    border-bottom: 2px solid #f0f0f0;
}

.tab-btn {
    background: none;
    border: none;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: #e74c3c;
    border-bottom-color: #e74c3c;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe6e6 100%);
}

.tab-btn:hover {
    color: #e74c3c;
    background: #fff5f5;
}

.tab-hidden {
    display: none !important;
}

/* Book Rating Container */
.book-rating-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    padding: 24px;
    margin: 20px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.book-rating-options {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.book-rating-option {
    background: #fff;
    border: 1px solid #e9ecef;
    border-radius: 12px;
    padding: 16px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.book-rating-option:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    border-color: #ffd93d;
}

.book-rating-option.selected {
    background: linear-gradient(135deg, #ffd93d 0%, #ffb74d 100%);
    border-color: #ffc107;
    color: #333;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 193, 7, 0.3);
}

.book-emoji {
    font-size: 28px;
    margin-bottom: 8px;
    display: block;
}

.book-rating-label {
    font-size: 13px;
    font-weight: 600;
    color: #495057;
}

.book-rating-option.selected .book-rating-label {
    color: #333;
}

/* Comment Section */
.book-comment-section {
    margin-top: 20px;
}

.book-comment-input {
    width: 100%;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    transition: border-color 0.3s ease;
}

.book-comment-input:focus {
    outline: none;
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.book-comment-input::placeholder {
    color: #adb5bd;
}

/* Button Group */
.book-button-group {
    margin-top: 20px;
    text-align: center;
}

.book-btn {
    border: none;
    border-radius: 8px;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.book-btn-primary {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.book-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
    background: linear-gradient(135deg, #c0392b 0%, #a93226 100%);
}

/* Reviews Display */
.existing-reviews {
    margin-top: 30px;
}

.reviews-summary {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.avg-rating {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.rating-number {
    font-size: 32px;
    font-weight: 700;
    color: #e74c3c;
}

.stars {
    display: flex;
    gap: 2px;
}

.stars i {
    font-size: 20px;
    color: #ffd93d;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.review-count {
    font-size: 14px;
    color: #6c757d;
    font-weight: 500;
}

/* Individual Reviews */
.reviews-list {
    space: 16px;
}

.review-item {
    background: #fff;
    border: 1px solid #e9ecef;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.review-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 10px;
}

.reviewer-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.reviewer-name {
    font-weight: 600;
    color: #333;
    font-size: 15px;
}

.review-rating {
    display: flex;
    gap: 1px;
}

.review-rating i {
    font-size: 14px;
    color: #ffd93d;
}

.review-date {
    color: #6c757d;
    font-size: 13px;
    font-weight: 500;
}

.review-comment {
    color: #495057;
    line-height: 1.6;
    margin-bottom: 12px;
    font-size: 14px;
}

.review-image img {
    max-width: 150px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* No Reviews State */
.no-reviews {
    text-align: center;
    padding: 40px 20px;
    color: #6c757d;
}

.no-reviews i {
    font-size: 48px;
    margin-bottom: 16px;
    color: #adb5bd;
}

.no-reviews p {
    font-size: 16px;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .book-rating-options {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .book-rating-option {
        padding: 12px 6px;
    }
    
    .book-emoji {
        font-size: 24px;
    }
    
    .book-rating-label {
        font-size: 12px;
    }
    
    .avg-rating {
        flex-direction: column;
        gap: 8px;
    }
    
    .rating-number {
        font-size: 28px;
    }
    
    .review-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .book-rating-container {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .book-rating-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .book-detail-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        text-align: center;
        border-bottom: 1px solid #e9ecef;
        border-radius: 0;
    }
    
    .tab-btn.active {
        border-bottom-color: #e74c3c;
        border-left: 4px solid #e74c3c;
    }
}

/* Animation cho khi review mới được thêm */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.review-item.new-review {
    animation: slideInUp 0.5s ease;
}

/* Loading state */
.reviews-loading {
    text-align: center;
    padding: 20px;
    color: #6c757d;
}

.reviews-loading::after {
    content: "...";
    animation: dots 1.5s steps(5, end) infinite;
}

@keyframes dots {
    0%, 20% { content: "."; }
    40% { content: ".."; }
    60% { content: "..."; }
    90%, 100% { content: ""; }
}