.example-btn i {
            font-size: 0.8rem;
        }
        .property-table th,
        .property-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .input-group-custom {
            margin-bottom: 1rem;
        }
        .result-value-lg {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 2.8rem;
            line-height: 1.2;
        }
        .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;
        }
        .result-card {
            background: #f8fafc;
            border-radius: 12px;
            padding: 1.5rem;
            border: 1px solid #e9ecef;
            margin: 0.5rem 0;
        }
        .result-card .label {
            font-size: 0.9rem;
            color: #6c757d;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .result-card .value {
            font-size: 2rem;
            font-weight: 700;
            color: #0d6efd;
        }
        .result-card .value.tons {
            font-size: 1.8rem;
            color: #198754;
        }
        .breakdown-bar {
            display: flex;
            height: 28px;
            border-radius: 6px;
            overflow: hidden;
            margin: 0.5rem 0;
            background: #e9ecef;
        }
        .breakdown-bar .segment {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 600;
            color: #fff;
            transition: width 0.5s ease;
            min-width: 20px;
        }
        .breakdown-bar .segment.structure {
            background: #0d6efd;
        }
        .breakdown-bar .segment.windows {
            background: #fd7e14;
        }
        .breakdown-bar .segment.occupants {
            background: #198754;
        }
        .breakdown-bar .segment.appliances {
            background: #6f42c1;
        }
        .breakdown-bar .segment.climate {
            background: #dc3545;
        }
        .breakdown-legend {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem 1.5rem;
            margin-top: 0.5rem;
            font-size: 0.85rem;
        }
        .breakdown-legend .item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .breakdown-legend .color-dot {
            width: 12px;
            height: 12px;
            border-radius: 3px;
            display: inline-block;
        }
        .efficiency-badge {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
        }
        .efficiency-badge.excellent {
            background: #d1e7dd;
            color: #0a3622;
        }
        .efficiency-badge.good {
            background: #cff4fc;
            color: #055160;
        }
        .efficiency-badge.fair {
            background: #fff3cd;
            color: #664d03;
        }
        .efficiency-badge.poor {
            background: #f8d7da;
            color: #58151c;
        }
        .recommendation-box {
            background: #e7f3ff;
            border-radius: 8px;
            padding: 1.2rem;
            border-left: 4px solid #0d6efd;
            margin: 0.8rem 0;
        }
        .recommendation-box i {
            color: #0d6efd;
        }
        .canvas-container {
            text-align: center;
            margin-top: 1rem;
        }
        .btu-canvas {
            width: 100%;
            height: auto;
            background-color: #f9f9f9;
            border: 1px solid #ddd;
            border-radius: 8px;
            display: block;
        }
        .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.blue {
            background: #0d6efd;
        }
        .legend-color.orange {
            background: #fd7e14;
        }
        .legend-color.green {
            background: #198754;
        }
        .legend-color.purple {
            background: #6f42c1;
        }
        .legend-color.red {
            background: #dc3545;
        }
        .related-tools-container {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .related-content .related-name {
            font-weight: 600;
            font-size: 0.95rem;
        }
        .related-content .related-name a {
            color: #0d6efd;
            text-decoration: none;
        }
        .related-content .related-name a:hover {
            text-decoration: underline;
        }
        .related-content .related-desc {
            font-size: 0.8rem;
            color: #6c757d;
            margin-top: 0.2rem;
        }
        .preset-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            margin: 0.5rem 0 1rem 0;
        }
        .preset-btn {
            background: #f1f3f5;
            border: 1px solid #dee2e6;
            border-radius: 20px;
            padding: 0.3rem 0.9rem;
            font-size: 0.8rem;
            cursor: pointer;
            transition: all 0.15s;
            color: #212529;
        }
        .preset-btn:hover {
            background: #0d6efd;
            color: #fff;
            border-color: #0d6efd;
        }
        .preset-btn i {
            margin-right: 0.3rem;
        }
        .input-group-prepend-custom {
            background: #f8f9fa;
            border: 1px solid #ced4da;
            border-right: none;
            border-radius: 4px 0 0 4px;
            padding: 0.375rem 0.75rem;
            display: flex;
            align-items: center;
            font-size: 0.9rem;
            color: #495057;
        }
        .form-select-sm-custom {
            padding: 0.25rem 0.5rem;
            font-size: 0.875rem;
            border-radius: 4px;
        }
        @media (max-width: 768px) {
            .result-card .value {
                font-size: 1.5rem;
            }
            .result-value-lg {
                font-size: 2rem;
            }
        }