.custom-amount-container {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }

        .custom-amount-container:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .custom-amount-container.focused {
            background: rgba(255, 255, 255, 0.2);
            border-color: #fff;
            box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
        }

        .custom-amount-input {
            background: transparent !important;
            border: none !important;
            color: #fff !important;
            font-weight: 600;
            font-size: 1.1rem;
            text-align: center;
            padding: 12px 15px;
            height: 100%;
            width: 100%;
        }

        .custom-amount-input::placeholder {
            color: rgba(255, 255, 255, 0.7) !important;
            font-weight: 400;
        }

        .custom-amount-input:focus {
            outline: none !important;
            box-shadow: none !important;
            color: #fff !important;
        }

        .currency-label {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.8);
            font-weight: 600;
            font-size: 1rem;
            pointer-events: none;
            z-index: 2;
        }

        .amount-btn-group .btn-check:checked + .btn {
            background-color: rgba(255, 255, 255, 0.2);
            border-color: #fff;
            color: #fff;
            box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
        }

        .amount-btn-group .btn {
            transition: all 0.3s ease;
            border: 2px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.1);
        }

        .amount-btn-group .btn:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-2px);
        }

        .pulse-animation {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4); }
            70% { box-shadow: 0 0 0 10px rgba(255, 255, 255, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
        }

        .form-control:focus {
            border-color: #00ae5a;
            box-shadow: 0 0 10px rgba(0, 174, 90, 0.3);
        }

        .btn-success {
            background: linear-gradient(45deg, #00ae5a, #28a745);
            border: none;
            transition: all 0.3s ease;
        }

        .btn-success:hover {
            background: linear-gradient(45deg, #28a745, #00ae5a);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 174, 90, 0.3);
        }