:root {
            --primary-teal: #1a6d5b;
            --secondary-teal: #5D9C94;
            --accent-blue: #34658B;
            --light-teal: #e6f2ef;
            --gradient-primary: linear-gradient(135deg, #1a6d5b 0%, #5D9C94 100%);
            --gradient-accent: linear-gradient(135deg, #34658B 0%, #5D9C94 100%);
            --gradient-success: linear-gradient(135deg, #28a745 0%, #5D9C94 100%);
            --gradient-warning: linear-gradient(135deg, #ffc107 0%, #fd7e14 100%);
            --shadow-soft: 0 10px 40px rgba(26, 109, 91, 0.15);
            --shadow-hover: 0 15px 50px rgba(26, 109, 91, 0.25);
        }

        body {
            background: linear-gradient(135deg, #f8f9fa 0%, #e6f2ef 100%);
            min-height: 100vh;
            font-family: 'Montserrat', Arial, sans-serif;
            padding-top: 120px;
        }

        .payment-container {
            max-width: 600px;
            margin: 60px auto;
            background: linear-gradient(145deg, #ffffff 0%, #fafbfc 100%);
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--shadow-soft);
            border: 1px solid rgba(26, 109, 91, 0.1);
            position: relative;
            overflow: hidden;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .payment-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 6px;
            background: var(--gradient-primary);
            border-radius: 24px 24px 0 0;
        }

        .payment-container:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .payment-header {
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }

        .payment-header::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--gradient-primary);
            border-radius: 2px;
        }

        .payment-container h2 {
            font-size: 2.2rem;
            font-weight: 700;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }

        .payment-icon {
            font-size: 2.5rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .payment-subtitle {
            color: #666;
            font-size: 1.1rem;
            margin-top: 8px;
        }

        .form-group {
            margin-bottom: 28px;
            position: relative;
        }

        .payment-container label {
            display: block;
            font-weight: 600;
            color: var(--primary-teal);
            margin-bottom: 8px;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .label-icon {
            font-size: 1.1rem;
            color: var(--secondary-teal);
        }

        .payment-container input {
            width: 100%;
            padding: 16px 20px;
            border: 2px solid #e1e8ed;
            border-radius: 12px;
            font-size: 1rem;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            background: #ffffff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            box-sizing: border-box;
        }

        .payment-container input:focus {
            outline: none;
            border-color: var(--secondary-teal);
            box-shadow: 0 0 0 3px rgba(93, 156, 148, 0.1), 0 4px 12px rgba(0, 0, 0, 0.08);
            transform: translateY(-2px);
        }

        .payment-container input:valid {
            border-color: #28a745;
        }

        .payment-button {
            width: 100%;
            margin-top: 32px;
            padding: 18px 32px;
            background: var(--gradient-primary);
            color: #fff;
            border: none;
            border-radius: 16px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(26, 109, 91, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }

        .payment-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .payment-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(26, 109, 91, 0.4);
        }

        .payment-button:hover::before {
            left: 100%;
        }

        .payment-button:active {
            transform: translateY(-1px);
        }

        .payment-button:disabled {
            background: #ccc;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .button-icon {
            font-size: 1.2rem;
        }

        .payment-status {
            margin-top: 24px;
            padding: 16px 20px;
            border-radius: 12px;
            font-weight: 600;
            text-align: center;
            min-height: 20px;
            transition: all 0.3s ease;
        }

        .status-processing {
            background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
            color: #856404;
            border: 1px solid #ffeaa7;
        }

        .status-success {
            background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        .status-error {
            background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .loading-spinner {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid #f3f3f3;
            border-top: 3px solid var(--secondary-teal);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-right: 10px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }

        .pulse-animation {
            animation: pulse 2s ease-in-out infinite;
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .payment-container {
                margin: 20px;
                padding: 30px 24px;
                border-radius: 20px;
            }

            .payment-container h2 {
                font-size: 1.8rem;
            }

            .payment-container input {
                padding: 14px 16px;
            }

            .payment-button {
                padding: 16px 24px;
                font-size: 1rem;
            }
        }

        @media (max-width: 480px) {
            .payment-container {
                margin: 15px;
                padding: 24px 20px;
            }

            .payment-container h2 {
                font-size: 1.6rem;
                flex-direction: column;
                gap: 8px;
            }

            .payment-icon {
                font-size: 2rem;
            }
        }