.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.wood { background-color: #c49a6c; }
        .legend-color.joist { background-color: #6c757d; }
        .legend-color.fastener { background-color: #dc3545; }
        .legend-color.border { background-color: #0d6efd; }
        .cost-summary {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1.2rem;
            margin: 1rem 0;
            border: 1px solid #e9ecef;
        }
        .cost-summary .total-cost {
            font-size: 2rem;
            font-weight: 700;
            color: #2e7d32;
        }
        .material-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .material-badge.wood {
            background-color: #d4a373;
            color: #fff;
        }
        .material-badge.composite {
            background-color: #6c757d;
            color: #fff;
        }
        .material-badge.aluminum {
            background-color: #adb5bd;
            color: #fff;
        }
        .deck-dimension-input {
            max-width: 120px;
        }
        .result-card {
            background-color: #fff;
            border-radius: 8px;
            padding: 1rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
            margin: 0.5rem 0;
            border-left: 4px solid var(--primary-color);
        }
        .result-card .label {
            font-size: 0.85rem;
            color: #6c757d;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .result-card .value {
            font-size: 1.6rem;
            font-weight: 600;
            color: #1a1a2e;
        }
        .result-card .sub {
            font-size: 0.9rem;
            color: #6c757d;
        }
        .related-tools-container {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .related-tool .related-tool .related-name {
            font-weight: 600;
        }
        .related-tool .related-name a {
            text-decoration: none;
            color: #1a1a2e;
        }
        .related-tool .related-name a:hover {
            color: var(--primary-color);
        }
        .related-tool .related-desc {
            font-size: 0.85rem;
            color: #6c757d;
            margin-top: 0.25rem;
        }
        .tool-header .badge {
            font-size: 0.75rem;
            vertical-align: middle;
        }
        .hardware-note {
            font-size: 0.9rem;
            color: #856404;
            background-color: #fff3cd;
            padding: 0.4rem 0.8rem;
            border-radius: 4px;
            display: inline-block;
            margin-top: 0.5rem;
        }
        .print-btn {
            margin-left: 0.5rem;
        }
        .unit-toggle-group .btn {
            font-size: 0.85rem;
            padding: 0.3rem 0.9rem;
        }
        .unit-toggle-group .btn-check:checked+.btn {
            background-color: var(--primary-color);
            color: #fff;
            border-color: var(--primary-color);
        }
        @media print {
            .no-print { display: none !important; }
            }
        @media (max-width: 768px) {
            .result-card .value {
                font-size: 1.2rem;
            }
            .legend {
                gap: 0.75rem;
                font-size: 0.75rem;
            }
        }