.info-card {
            background: rgba(30, 41, 59, 0.8);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(6, 182, 212, 0.2);
            transition: all 0.3s ease;
        }

        .info-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
        }

        .book-cover {
            background: linear-gradient(135deg, #1e293b, #334155);
            border: 2px solid rgba(34, 211, 238, 0.3);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }

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

        .star {
            color: #fbbf24;
            font-size: 1.2rem;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .star:hover {
            transform: scale(1.2);
        }

        .star.filled {
            color: #f59e0b;
        }

        .tag {
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: var(--cyan);
        }

        .comment-card {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(100, 116, 139, 0.2);
            transition: all 0.3s ease;
        }

        .comment-card:hover {
            background: rgba(30, 41, 59, 0.8);
            border-color: rgba(34, 211, 238, 0.3);
        }

        .comment-form {
            background: rgba(30, 41, 59, 0.9);
            border: 1px solid rgba(6, 182, 212, 0.3);
        }

        .form-input {
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(100, 116, 139, 0.4);
            color: var(--ink);
            transition: all 0.3s ease;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
            background: rgba(15, 23, 42, 0.95);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--cyan), var(--blue));
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(34, 211, 238, 0.3);
        }

        .btn-secondary {
            background: rgba(100, 116, 139, 0.2);
            border: 1px solid rgba(100, 116, 139, 0.4);
            color: var(--muted);
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            background: rgba(34, 211, 238, 0.1);
            border-color: var(--cyan);
            color: var(--cyan);
        }

        .progress-bar {
            background: rgba(100, 116, 139, 0.3);
            border-radius: 10px;
            overflow: hidden;
        }

        .progress-fill {
            background: linear-gradient(90deg, var(--cyan), var(--blue));
            height: 8px;
            border-radius: 10px;
            transition: width 0.5s ease;
        }

        .fade-in {
            animation: fadeIn 0.5s ease-out;
        }

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

        .like-btn {
            transition: all 0.2s ease;
        }

        .like-btn:hover {
            transform: scale(1.1);
        }

        .like-btn.liked {
            color: #ef4444;
        }

        .data-grid {
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 0.5rem 1rem;
        }

        .breadcrumb {
            color: var(--muted);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .breadcrumb:hover {
            color: var(--cyan);
        }

        .floating-action {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: linear-gradient(135deg, var(--cyan), var(--blue));
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 30px rgba(34, 211, 238, 0.4);
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .floating-action:hover {
            transform: scale(1.1);
            box-shadow: 0 15px 40px rgba(34, 211, 238, 0.6);
        }

        @media (max-width: 768px) {
            .floating-action {
                bottom: 1rem;
                right: 1rem;
                width: 50px;
                height: 50px;
            }
        }

        /*レビューいいねcss*/
        .like-btn i {
  transition: transform 0.15s ease, color 0.3s ease;
}
.like-btn:active i {
  transform: scale(1.3);
  color: #60a5fa; /* 明るい青 */
}