.compare-card {
            background: #f8fafc;
            border-radius: 12px;
            padding: 1.5rem;
            margin: 1rem 0;
            border: 1px solid #e2e8f0;
        }
        .spec-badge {
            display: inline-block;
            background: #eef2f6;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin: 0.2rem;
        }
        .spec-badge.primary {
            background: var(--primary-color);
            color: #fff;
        }
        .fitment-visual {
            background: #1a202c;
            border-radius: 12px;
            padding: 1.5rem;
            margin: 1rem 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            min-height: 180px;
        }
        .tire-visual {
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .tire-circle {
            border-radius: 50%;
            border: 3px solid #4a5568;
            background: radial-gradient(circle at 40% 40%, #2d3748, #1a202c);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #a0aec0;
            font-size: 0.75rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .tire-label {
            color: #e2e8f0;
            font-size: 0.8rem;
            margin-top: 0.5rem;
            text-align: center;
        }
        .compare-arrow {
            color: #4a5568;
            font-size: 2rem;
        }
        .section-divider {
            border: 0;
            border-top: 2px dashed #e2e8f0;
            margin: 2rem 0;
        }
        .formula-box {
            background: #f7fafc;
            border-radius: 8px;
            padding: 1rem 1.5rem;
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
            border-left: 4px solid var(--primary-color);
            margin: 1rem 0;
        }
        .fitment-note {
            background: #ebf8ff;
            border: 1px solid #bee3f8;
            color: #2b6cb0;
            padding: 0.75rem 1rem;
            border-radius: 6px;
            font-size: 0.95rem;
        }
        .unit-toggle {
            display: flex;
            gap: 0.5rem;
            align-items: center;
            margin: 0.5rem 0;
        }
        .unit-toggle .btn-group .btn {
            font-size: 0.85rem;
            padding: 0.25rem 0.75rem;
        }
        .spec-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 0.75rem;
            margin: 1rem 0;
        }
        .spec-item {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            padding: 0.75rem;
            text-align: center;
        }
        .spec-item .label {
            font-size: 0.7rem;
            text-transform: uppercase;
            color: #718096;
            letter-spacing: 0.5px;
        }
        .spec-item .value {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2d3748;
        }
        .property-table th,
        .property-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .deep-dive p {
            text-align: justify;
        }
        .toast {
            background: #333;
            color: #fff;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 0.95rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
            opacity: 0;
            transition: opacity 0.3s ease;
            pointer-events: none;
        }
        .toast.show {
            opacity: 1;
            pointer-events: auto;
        }
        .tire-visual-compare {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            padding: 1rem;
        }
        @media (max-width: 576px) {
            .tire-visual-compare {
                gap: 1rem;
            }
            .compare-arrow {
                font-size: 1.2rem;
            }
        }