.roommate-table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        .roommate-table th, .roommate-table td {
            padding: 12px 8px;
            border-bottom: 1px solid #e9ecef;
            vertical-align: middle;
        }
        .roommate-table th {
            background-color: #f8fafc;
            font-weight: 600;
            color: #1e293b;
        }
        .rm-input {
            width: 100%;
            padding: 8px 10px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            transition: 0.2s;
        }
        .rm-input:focus {
            border-color: #3b82f6;
            outline: none;
            box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
        }
        .rm-input.is-invalid {
            border-color: #ef4444;
            background-color: #fee2e2;
        }
        .remove-rm-btn {
            background: none;
            border: none;
            color: #ef4444;
            font-size: 1.2rem;
            cursor: pointer;
            transition: 0.2s;
        }
        .remove-rm-btn:hover {
            color: #b91c1c;
            transform: scale(1.1);
        }
        .add-rm-btn {
            background-color: #f1f5f9;
            border: 1px dashed #3b82f6;
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 500;
            color: #1e40af;
            transition: 0.2s;
        }
        .add-rm-btn:hover {
            background-color: #e0f2fe;
        }
        .method-badge {
            background: #eef2ff;
            padding: 8px 14px;
            border-radius: 40px;
            font-size: 0.9rem;
        }
        .result-table {
            margin-top: 1.5rem;
            width: 100%;
            border-collapse: collapse;
        }
        .result-table th, .result-table td {
            padding: 12px 10px;
            border-bottom: 1px solid #e2e8f0;
        }
        .total-paid {
            font-weight: 700;
            background-color: #f8fafc;
        }
        .pie-canvas-container {
            max-width: 280px;
            margin: 0 auto;
            text-align: center;
        }
        canvas#rentPieChart {
            width: 100%;
            height: auto;
            background: #fefefe;
            border-radius: 50%;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        .case-study-card {
            background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
            border-radius: 1rem;
            border-left: 5px solid #3b82f6;
        }
        .money-highlight {
            font-size: 1.7rem;
            font-weight: 800;
            color: #0f3b5c;
        }
        .legend-color {
            display: inline-block;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            margin-right: 6px;
        }
        .share-badge {
            background-color: #e6f7e6;
            padding: 2px 8px;
            border-radius: 30px;
            font-size: 0.8rem;
        }
        @media (max-width: 768px) {
            .roommate-table th, .roommate-table td {
                font-size: 0.85rem;
                padding: 8px 4px;
            }
            .rm-input {
                font-size: 0.85rem;
            }
        }