.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;
        }
        .geometry-canvas {
            width: 100%;
            height: auto;
            background-color: #f9f9f9;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin-top: 1.5rem;
            display: block;
        }
        .canvas-container {
            text-align: center;
            margin-top: 1rem;
        }
        .legend {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin: 0.5rem 0;
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .legend-item {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .legend-color {
            width: 16px;
            height: 16px;
            border-radius: 50%;
        }
        .legend-color.red {
            background-color: #dc3545;
        }
        .legend-color.blue {
            background-color: #0d6efd;
        }
        .legend-color.gray {
            background-color: #6c757d;
        }
        .legend-color.green {
            background-color: #28a745;
        }
        .result-box {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 1.2rem 1.5rem;
            margin: 0.5rem 0;
            border: 1px solid #e9ecef;
        }
        .result-box .label {
            font-size: 0.9rem;
            color: #6c757d;
            font-weight: 500;
        }
        .result-box .value {
            font-size: 2.2rem;
            font-weight: 700;
            color: #0d6efd;
            font-family: 'Cambria Math', serif;
        }
        .result-box .value.negative {
            color: #dc3545;
        }
        .result-box .value.zero {
            color: #6c757d;
        }
        .result-box .validation {
            font-size: 1rem;
            color: #28a745;
        }
        .property-card {
            background: white;
            border: 1px solid #e9ecef;
            border-radius: 8px;
            padding: 1rem 1.2rem;
            margin: 0.5rem 0;
            transition: all 0.2s;
        }
        .property-card:hover {
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
        }
        .property-card .prop-name {
            font-weight: 600;
            color: #0d6efd;
        }
        .property-card .prop-desc {
            color: #495057;
            font-size: 0.95rem;
        }
        .function-examples .example-btn .badge-example {
            font-size: 0.7rem;
            background: rgba(13, 110, 253, 0.1);
            color: #0d6efd;
            border-radius: 4px;
            padding: 0.1rem 0.4rem;
        }
        .history-timeline {
            position: relative;
            padding-left: 2rem;
        }
        .history-timeline::before {
            content: '';
            position: absolute;
            left: 6px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: #d1d9e6;
        }
        .history-item {
            position: relative;
            margin-bottom: 1.5rem;
        }
        .history-item::before {
            content: '';
            position: absolute;
            left: -2rem;
            top: 6px;
            width: 12px;
            height: 12px;
            background: #0d6efd;
            border-radius: 50%;
            border: 2px solid white;
            box-shadow: 0 0 0 2px #0d6efd;
        }
        .history-item .year {
            font-weight: 700;
            color: #0d6efd;
        }
        .history-item .event {
            color: #212529;
        }
        .formula-highlight {
            background: #f1f3f5;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            font-family: 'Cambria Math', serif;
            font-size: 1.05rem;
        }
        .tooltip-custom {
            border-bottom: 1px dashed #adb5bd;
            cursor: help;
        }
        @media (max-width: 576px) {
            .result-box .value {
                font-size: 1.6rem;
            }
            .legend {
                gap: 0.8rem;
                font-size: 0.8rem;
            }
        }