.color-preview {
            width: 100%;
            height: 160px;
            border-radius: 12px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            transition: all 0.2s ease;
            margin-top: 0.5rem;
        }
        .hex-display {
            font-family: 'Courier New', monospace;
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: 1px;
            background: #f1f5f9;
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 32px;
        }
        .ral-chip {
            background: #f8fafc;
            border-radius: 40px;
            padding: 0.3rem 1rem;
            font-family: monospace;
            font-weight: 600;
            font-size: 1rem;
        }
        .color-math-box {
            background: linear-gradient(135deg, #f9fafc 0%, #f3f6fc 100%);
            border-left: 5px solid #1e3a8a;
        }
        .example-chip {
            background: #ffffff;
            border: 1px solid #cbd5e1;
            border-radius: 40px;
            padding: 0.4rem 1rem;
            font-weight: 500;
            transition: 0.1s;
            cursor: pointer;
        }
        .example-chip:hover {
            background: #eef2ff;
            border-color: #3b82f6;
            transform: translateY(-1px);
        }
        .rgb-row {
            font-size: 1rem;
            letter-spacing: 0.3px;
        }