* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background-color: #fafbfb;
            color: #333;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .header {
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .logo {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: #214775;
        }

        .logo img {
            width: 40px;
            height: 40px;
            margin-right: 10px;
        }

        .logo span {
            font-weight: 600;
            font-size: 1.1rem;
        }

        /* Main Content */
        .main-content {
            padding: 60px 0;
            min-height: calc(100vh - 200px);
        }

        .registration-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(33, 71, 117, 0.1);
            overflow: hidden;
            max-width: 800px;
            margin: 0 auto;
        }

        .registration-header {
            background: linear-gradient(135deg, #214775 0%, #1a3a5f 100%);
            color: white;
            padding: 40px;
            text-align: center;
        }

        .registration-header h1 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .registration-header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

        .card-selection {
            display: flex;
            gap: 20px;
            justify-content: center;
            margin-top: 30px;
        }

        .card-option {
            position: relative;
            cursor: pointer !important;
            transition: all 0.3s ease;
        }

        .card-option input[type="radio"] {
            display: none;
            cursor: pointer !important;
        }

        .card-display {
            width: 120px;
            height: 75px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 0.9rem;
            border: 3px solid transparent;
            transition: all 0.3s ease;
        }

        .card-display.platinum {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            color: #333;
            cursor: pointer !important;
        }

        .card-display.black {
            background: linear-gradient(135deg, #2c2c2c 0%, #000 100%);
            color: white;
            cursor: pointer !important;
        }

        .card-option input[type="radio"]:checked + .card-display {
            border-color: #56c7dc;
            transform: scale(1.05);
            box-shadow: 0 5px 20px rgba(86, 199, 220, 0.3);
        }

        .form-container {
            padding: 40px;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: #214775;
        }

        .required {
            color: #e74c3c;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: #fafbfb;
            cursor: pointer;
        }

        .form-control:focus {
            outline: none;
            border-color: #56c7dc;
            box-shadow: 0 0 0 3px rgba(86, 199, 220, 0.1);
        }

        .form-control.error {
            border-color: #e74c3c;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .form-row-three {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 20px;
        }

        .gender-options {
            display: flex;
            gap: 20px;
            margin-top: 8px;
        }

        .gender-option {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .gender-option input[type="radio"] {
            width: 18px;
            height: 18px;
            accent-color: #214775;
        }

        .helper-text {
            font-size: 0.85rem;
            color: #6c757d;
            margin-top: 5px;
        }

        .error-message {
            color: #e74c3c;
            font-size: 0.85rem;
            margin-top: 5px;
            display: none;
        }

        .submit-btn {
            background: linear-gradient(135deg, #214775 0%, #1a3a5f 100%);
            color: white;
            padding: 15px 40px;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
            margin-top: 20px;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(33, 71, 117, 0.3);
        }

        .submit-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Footer */
        .footer {
            background: #214775;
            color: white;
            text-align: center;
            padding: 20px 0;
            margin-top: 60px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .form-row, .form-row-three {
                grid-template-columns: 1fr;
            }

            .card-selection {
                flex-direction: column;
                align-items: center;
            }

            .registration-header {
                padding: 30px 20px;
            }

            .form-container {
                padding: 30px 20px;
            }
        }

        .success-message {
            background: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            display: none;
        }