.force-entry {
            background: #fefefe;
            border: 1px solid #e2e8f0;
            border-radius: 0.75rem;
            padding: 0.8rem 1rem;
            margin-bottom: 0.8rem;
            transition: 0.1s;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
        }
        .force-entry .force-controls {
            display: flex;
            flex: 3;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: flex-end;
        }
        .force-entry .force-controls .form-group {
            flex: 1;
            min-width: 120px;
        }
        .force-entry .force-controls label {
            font-size: 0.75rem;
            text-transform: uppercase;
            font-weight: 600;
            color: #495057;
        }
        .remove-force-btn {
            align-self: center;
            background: none;
            border: none;
            color: #dc3545;
            font-size: 1.2rem;
            cursor: pointer;
            transition: 0.2s;
            padding: 0 10px;
        }
        .remove-force-btn:hover {
            transform: scale(1.1);
            color: #a71d2a;
        }
        .math-panel {
            background: #f1f4f9;
            border-radius: 1rem;
            padding: 1.2rem;
            margin-top: 1.5rem;
        }
        .result-badge {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .force-vector-canvas {
            background: #fdfdfd;
            border-radius: 1rem;
            width: 100%;
            border: 1px solid #e0e7ff;
            margin-top: 1rem;
        }
        .legend-canvas {
            display: flex;
            gap: 1.5rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 0.5rem;
            font-size: 0.8rem;
        }
        .legend-dot {
            width: 12px;
            height: 12px;
            display: inline-block;
            border-radius: 2px;
            margin-right: 5px;
        }
        .example-btn-sm {
            background: #e9ecef;
            border: none;
            border-radius: 30px;
            padding: 0.3rem 0.9rem;
            font-size: 0.8rem;
            transition: 0.1s;
        }
        .example-btn-sm:hover {
            background: #ced4da;
            transform: translateY(-1px);
        }
        .angle-hint {
            font-size: 0.7rem;
            color: #6c757d;
            margin-top: 0.2rem;
        }
        @media (max-width: 768px) {
            .force-entry .force-controls {
                flex-direction: column;
                align-items: stretch;
            }
            }