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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background: linear-gradient(135deg, #1d3557 0%, #457b9d 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .registration-container {
            background: white;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            width: 100%;
            max-width: 800px;
            overflow: hidden;
        }

        .header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            padding: 30px;
            text-align: center;
        }

        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            margin-bottom: 10px;
        }

        .logo i {
            font-size: 36px;
            color: #3498db;
        }

        .logo h1 {
            font-size: 28px;
            font-weight: 700;
        }

        .header p {
            color: #ecf0f1;
            font-size: 16px;
            opacity: 0.9;
        }

        .main-content {
            padding: 40px;
        }

        .page-title {
            text-align: center;
            margin-bottom: 30px;
        }

        .page-title h2 {
            color: #2c3e50;
            font-size: 24px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .page-title p {
            color: #4e5d78;
            font-size: 16px;
        }

        .error-messages {
            background: #fee;
            border: 1px solid #f5c6cb;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 30px;
        }

        .error-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
            color: #721c24;
        }

        .error-header i {
            font-size: 20px;
        }

        .error-header h3 {
            font-size: 16px;
            margin: 0;
        }

        .error-messages ul {
            list-style: none;
            padding-left: 30px;
        }

        .error-messages li {
            color: #721c24;
            margin-bottom: 8px;
            position: relative;
        }

        .error-messages li::before {
            content: '•';
            position: absolute;
            left: -15px;
            color: #dc3545;
        }

        .registration-form {
            display: grid;
            gap: 30px;
        }

        .form-section {
            padding-bottom: 20px;
            border-bottom: 2px solid #f0f4f8;
        }

        .form-section:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .form-section h3 {
            color: #2c3e50;
            font-size: 18px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group.full-width {
            grid-column: 1 / -1;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #2c3e50;
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .required {
            color: #e74c3c;
            font-weight: bold;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid #e0e6ef;
            border-radius: 8px;
            font-size: 15px;
            color: #2c3e50;
            transition: all 0.3s;
            background: white;
        }

        .form-group input:focus,
        .form-group select:focus {
            border-color: #3498db;
            outline: none;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
        }

        .form-group input.error,
        .form-group select.error {
            border-color: #e74c3c;
        }

        .form-hint {
            font-size: 12px;
            color: #6c757d;
            margin-top: 6px;
            font-style: italic;
        }

        .login-note {
            background: #f0f7ff;
            border-radius: 8px;
            padding: 20px;
            margin: 30px 0;
            text-align: center;
            border: 2px dashed #3498db;
        }

        .login-note p {
            color: #2c3e50;
            margin: 0;
            font-size: 15px;
            line-height: 1.5;
        }

        .login-note strong {
            color: #e74c3c;
        }

        .form-actions {
            text-align: center;
            margin-top: 30px;
        }

        .btn {
            padding: 16px 40px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-width: 200px;
            justify-content: center;
        }

        .btn-primary {
            background: #2ecc71;
            color: white;
        }

        .btn-primary:hover {
            background: #27ae60;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(46, 204, 113, 0.3);
        }

        .btn-primary:disabled {
            background: #bdc3c7;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .login-link {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #e0e6ef;
        }

        .login-link p {
            color: #4e5d78;
            margin-bottom: 10px;
        }

        .login-link a {
            color: #3498db;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color 0.3s;
        }

        .login-link a:hover {
            color: #2980b9;
            text-decoration: underline;
        }

        /* Responsive Design */
        @media screen and (max-width: 768px) {
            .main-content {
                padding: 20px;
            }

            .form-grid {
                grid-template-columns: 1fr;
            }

            .btn {
                width: 100%;
                min-width: auto;
            }

            .header {
                padding: 20px;
            }

            .logo {
                flex-direction: column;
                gap: 10px;
            }

            .logo h1 {
                font-size: 24px;
            }
        }

        /* Animation for form */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .registration-form {
            animation: fadeIn 0.5s ease-out;
        }