.property-table th,
        .property-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .input-group-custom {
            margin-bottom: 1rem;
        }
        .deep-dive {
            margin: 1.8rem 0;
        }
        .deep-dive p {
            text-align: justify;
        }
        .unit-note {
            font-size: 0.9rem;
            color: #6c757d;
        }
        .coord-input {
            margin-bottom: 0.5rem;
        }
        .conversion-display {
            background-color: #f8f9fa;
            border-radius: 12px;
            padding: 2rem 1.5rem;
            text-align: center;
            border: 1px solid #e9ecef;
        }
        .conversion-display .big-number {
            font-size: 3.5rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1.2;
        }
        .conversion-display .unit-label {
            font-size: 1.2rem;
            color: #6c757d;
            font-weight: 400;
        }
        .conversion-display .arrow-icon {
            font-size: 2.5rem;
            color: #adb5bd;
            margin: 0 0.5rem;
        }
        .conversion-history {
            max-height: 160px;
            overflow-y: auto;
            font-size: 0.9rem;
        }
        .conversion-history .history-item {
            display: flex;
            justify-content: space-between;
            padding: 0.3rem 0;
            border-bottom: 1px solid #f1f3f5;
        }
        .conversion-history .history-item:last-child {
            border-bottom: none;
        }
        .conversion-chart-container {
            background-color: #f9f9f9;
            border-radius: 8px;
            padding: 1rem;
            margin-top: 1.5rem;
            border: 1px solid #e9ecef;
        }
        .conversion-chart-container canvas {
            width: 100% !important;
            height: auto !important;
            max-height: 180px;
        }
        .quick-ref-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 0.75rem;
            margin: 1rem 0;
        }
        .quick-ref-item {
            background-color: #f8f9fa;
            border-radius: 6px;
            padding: 0.5rem 0.75rem;
            text-align: center;
            border: 1px solid #e9ecef;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.15s;
        }
        .quick-ref-item:hover {
            background-color: #e9ecef;
            border-color: var(--primary-color);
        }
        .quick-ref-item .ref-value {
            font-weight: 700;
            color: var(--primary-color);
        }
        .conversion-mode-toggle {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
            justify-content: center;
        }
        .conversion-mode-toggle .btn-toggle {
            border-radius: 20px;
            padding: 0.4rem 1.2rem;
            border: 2px solid #dee2e6;
            background: transparent;
            font-weight: 500;
            transition: all 0.2s;
            color: #495057;
        }
        .conversion-mode-toggle .btn-toggle.active {
            border-color: var(--primary-color);
            background-color: var(--primary-color);
            color: #fff;
        }
        .conversion-mode-toggle .btn-toggle:hover:not(.active) {
            background-color: #f1f3f5;
        }
        @media (max-width: 576px) {
            .conversion-display .big-number {
                font-size: 2.5rem;
            }
            .conversion-display .arrow-icon {
                font-size: 1.8rem;
            }
        }