.complex-input-group {
            background: #f8fafd;
            border-radius: 20px; 
            margin-bottom: 1.5rem;
        }
        .result-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .result-card {
            background: linear-gradient(145deg, #ffffff, #f6faff);
            border-radius: 20px;
            padding: 1.2rem;
            border: 1px solid rgba(70, 130, 180, 0.2);
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
            transition: transform 0.1s ease;
        }
        .result-card:hover {
            transform: translateY(-2px);
            border-color: var(--primary-color);
        }
        .result-label {
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: #5a6a7a;
            margin-bottom: 0.3rem;
        }
        .result-value {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1e2f4a;
            word-break: break-word;
        }
        .result-value small {
            font-size: 0.9rem;
            font-weight: 400;
            color: #6c7a8a;
        }
        .example-btn {
            background-color: rgba(70, 130, 180, 0.1);
            border: 1px solid rgba(70, 130, 180, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            font-family: 'Courier New', monospace;
            display: inline-block;
            margin: 0.25rem;
        }
        .example-btn:hover {
            background-color: rgba(70, 130, 180, 0.2);
            transform: translateY(-2px);
        }
        .math-box {
            background: #f0f7fa;
            border-left: 5px solid var(--primary-color);
            padding: 1.2rem;
            border-radius: 0 16px 16px 0;
            margin: 1.5rem 0;
        }
        .section-title {
            font-size: 1.6rem;
            font-weight: 600;
            color: #1a2c3f;
            margin: 2rem 0 1rem;
        }
        .subsection-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--accent-color);
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .property-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .property-table th {
            background: #eef2f7;
            padding: 0.75rem;
        }
        .property-table td {
            padding: 0.75rem;
            border: 1px solid #dee2e6;
        }
        .key-point {
            color: var(--primary-color);
            font-weight: 600;
        }
        .privacy-note {
            font-size: 0.9rem;
            background-color: #e7f3ff;
            border: 1px solid #b8daff;
            color: #004085;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin: 1rem 0;
        }
        .warning-note {
            background-color: #fff3cd;
            border: 1px solid #ffeeba;
            color: #856404;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin: 1rem 0;
        }
        .complex-plane-note {
            background: #f2f0ff;
            border-radius: 12px;
            padding: 1rem;
            font-size: 0.95rem;
        }
        .reference-list {
            font-size: 0.9rem;
            background: #f9f9fc;
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid var(--primary-color);
        }
        .case-study {
            background: #eef6ff;
            border-radius: 16px;
            padding: 1.2rem;
            margin: 1.5rem 0;
        }