.greek-card {
            background: linear-gradient(145deg, #f8fafd 0%, #ffffff 100%);
            border-radius: 20px;
            padding: 1.5rem 0.5rem;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
            border: 1px solid rgba(70, 130, 180, 0.15);
            transition: all 0.15s ease;
            height: 100%;
        }
        .greek-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary-color);
            box-shadow: 0 12px 24px rgba(70,130,180,0.1);
        }
        .greek-label {
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: #5a6a7a;
            margin-bottom: 0.5rem;
        }
        .greek-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1e2f4a;
            line-height: 1.2;
        }
        .greek-desc {
            font-size: 0.7rem;
            color: #7c8b9c;
            margin-top: 0.3rem;
        }
        .option-price-badge {
            background: #e4eff9;
            border-radius: 100px;
            padding: 1rem 2rem;
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary-color);
            display: inline-block;
            border: 2px solid white;
            box-shadow: 0 5px 15px rgba(0,40,80,0.1);
            margin-bottom: 0.5rem;
        }
        .option-type-toggle {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            margin: 1rem 0;
        }
        .btn-option-type {
            border-radius: 40px;
            padding: 0.5rem 2rem;
            font-weight: 600;
            border: 2px solid transparent;
            background-color: #f0f4fa;
            color: #2b3f5c;
        }
        .btn-option-type.active {
            background-color: var(--primary-color);
            color: white;
        }
        .input-unit {
            font-size: 0.8rem;
            color: #7c8b9c;
            margin-top: 0.2rem;
        }
        .model-equation {
            background-color: #f2f7fd;
            border-radius: 16px;
            padding: 1.2rem;
            font-family: 'Courier New', monospace;
            font-size: 0.95rem;
            border-left: 5px solid var(--primary-color);
        }
        .option-input-panel {
            background: #f8fafd;
            border-radius: 24px;
            padding: 1.8rem;
            margin-bottom: 2rem;
        }
        .result-panel {
            background: #f6faff;
            border-radius: 32px;
            padding: 2rem;display:none
        }
        .unit-note {
            font-size: 0.8rem;
            color: #5a6a7a;
            margin-top: 0.5rem;
            text-align: right;
        }