.reaction-panel {
            background: #f8fafc;
            border-radius: 24px;
            padding: 2rem 1.5rem;
            text-align: center;
            border: 1px solid rgba(13, 110, 253, 0.15);
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
        }
        .reaction-trigger {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: linear-gradient(145deg, #0a58ca, #0d6efd);
            color: white;
            font-size: 1.8rem;
            font-weight: 700;
            border: none;
            box-shadow: 0 12px 0 #0a3d8c, 0 6px 18px rgba(13,110,253,0.3);
            transition: all 0.05s ease;
            margin: 1.8rem auto;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            user-select: none;
        }
        .reaction-trigger:active {
            transform: translateY(6px);
            box-shadow: 0 6px 0 #0a3d8c, 0 6px 18px rgba(13,110,253,0.25);
        }
        .reaction-trigger.waiting {
            background: #6c757d;
            box-shadow: 0 8px 0 #4b5259;
            cursor: wait;
        }
        .reaction-trigger.ready {
            background: #198754;
            box-shadow: 0 10px 0 #0f5132;
            animation: pulse-green 1.2s infinite;
        }
        @keyframes pulse-green {
            0% { box-shadow: 0 10px 0 #0f5132, 0 0 0 0 rgba(25,135,84,0.4); }
            70% { box-shadow: 0 10px 0 #0f5132, 0 0 0 12px rgba(25,135,84,0); }
            100% { box-shadow: 0 10px 0 #0f5132, 0 0 0 0 rgba(25,135,84,0); }
        }
        .stat-card {
            background: white;
            border-radius: 20px;
            padding: 1.2rem 1rem;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            border: 1px solid #e9ecef;
            height: 100%;
        }
        .stat-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: #0d6efd;
            line-height: 1.2;
        }
        .stat-label {
            color: #6c757d;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .history-badge {
            background: #e7f1ff;
            color: #0a58ca;
            padding: 0.25rem 0.75rem;
            border-radius: 30px;
            font-size: 0.9rem;
        }
        .trend-canvas {
            width: 100%;
            height: auto;
            background: #ffffff;
            border-radius: 16px;
            padding: 0.5rem;
        }
        .false-start-warning {
            background-color: #fff3cd;
            border: 1px solid #ffecb5;
            color: #856404;
        }
        .research-callout {
            background-color: #eef2ff;
            border-left: 5px solid #4f46e5;
        }
        .tool-header h1 i {
            color: #0d6efd;
            margin-right: 10px;
        }
        .privacy-badge {
            background: #e6f7e6;
            color: #0f5132;
        }
        .reference-list {
            font-size: 0.9rem;
        }