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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow-x: hidden;
            padding: 2rem 0;
        }

        /* Background Pattern */
        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="60" cy="60" r="1.2" fill="rgba(255,255,255,0.1)"/></svg>');
            opacity: 0.6;
            animation: float 20s infinite linear;
        }

        @keyframes float {
            0% { transform: translateY(0px) rotate(0deg); }
            100% { transform: translateY(-20px) rotate(360deg); }
        }

        .register-container {
            position: relative;
            z-index: 2;
            width: 100%;
            max-width: 450px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        .register-card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(15px);
            border-radius: 25px;
            padding: 2.5rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: transform 0.3s ease;
        }

        .register-card:hover {
            transform: translateY(-5px);
        }

        .register-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
            font-size: 2rem;
            font-weight: bold;
            color: #28a745;
        }

        .logo i {
            background: linear-gradient(135deg, #28a745, #20c997);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: heartbeat 2s infinite;
        }

        @keyframes heartbeat {
            0%, 100% { transform: scale(1); }
            25% { transform: scale(1.1); }
            50% { transform: scale(1); }
            75% { transform: scale(1.05); }
        }

        .register-title {
            font-size: 1.5rem;
            font-weight: bold;
            color: #333;
            margin-bottom: 0.5rem;
        }

        .register-subtitle {
            color: #666;
            font-size: 0.95rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
            position: relative;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            color: #333;
            font-weight: 500;
            font-size: 0.9rem;
        }

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

        .form-control:focus {
            outline: none;
            border-color: #28a745;
            box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
            transform: translateY(-2px);
        }

        .form-control.valid {
            border-color: #28a745;
            background: rgba(40, 167, 69, 0.05);
        }

        .form-control.invalid {
            border-color: #dc3545;
            background: rgba(220, 53, 69, 0.05);
        }

        .form-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: #666;
            font-size: 1.1rem;
            margin-top: 0.75rem;
            transition: color 0.3s ease;
        }

        .form-control.valid + .validation-icon {
            color: #28a745;
        }

        .form-control.invalid + .validation-icon {
            color: #dc3545;
        }

        .validation-icon {
            position: absolute;
            right: 1rem;
            top: 50%;
            transform: translateY(-50%);
            margin-top: 0.75rem;
            font-size: 1rem;
        }

        .validation-icon.valid {
            color: #28a745;
        }

        .validation-icon.invalid {
            color: #dc3545;
        }

        .field-feedback {
            font-size: 0.8rem;
            margin-top: 0.5rem;
            padding-left: 0.5rem;
            transition: all 0.3s ease;
        }

        .field-feedback.valid {
            color: #28a745;
        }

        .field-feedback.invalid {
            color: #dc3545;
        }

        .password-strength {
            margin-top: 0.5rem;
        }

        .password-strength-label {
            font-size: 0.8rem;
            color: #666;
            margin-bottom: 0.25rem;
        }

        .password-strength-bar {
            height: 4px;
            background: #e9ecef;
            border-radius: 2px;
            overflow: hidden;
        }

        .password-strength-fill {
            height: 100%;
            width: 0%;
            transition: all 0.3s ease;
            border-radius: 2px;
        }

        .password-strength-fill.weak {
            width: 25%;
            background: #dc3545;
        }

        .password-strength-fill.fair {
            width: 50%;
            background: #fd7e14;
        }

        .password-strength-fill.good {
            width: 75%;
            background: #ffc107;
        }

        .password-strength-fill.strong {
            width: 100%;
            background: #28a745;
        }

        .register-btn {
            width: 100%;
            padding: 1rem;
            background: linear-gradient(135deg, #28a745, #20c997);
            color: white;
            border: none;
            border-radius: 15px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 1.5rem;
        }

        .register-btn:hover:not(:disabled) {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(40, 167, 69, 0.3);
            background: linear-gradient(135deg, #20c997, #17a2b8);
        }

        .register-btn:active {
            transform: translateY(-1px);
        }

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

        .login-link {
            text-align: center;
            color: #666;
            font-size: 0.95rem;
        }

        .login-link a {
            color: #28a745;
            text-decoration: none;
            font-weight: bold;
            transition: color 0.3s ease;
        }

        .login-link a:hover {
            color: #20c997;
        }

        .back-home {
            position: absolute;
            top: 2rem;
            left: 2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            z-index: 3;
        }

        .back-home:hover {
            color: rgba(255, 255, 255, 0.8);
            transform: translateX(-5px);
        }

        .error-message {
            background: rgba(220, 53, 69, 0.1);
            color: #dc3545;
            padding: 0.75rem 1rem;
            border-radius: 10px;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
            border-left: 4px solid #dc3545;
            display: none;
        }

        .success-message {
            background: rgba(40, 167, 69, 0.1);
            color: #28a745;
            padding: 0.75rem 1rem;
            border-radius: 10px;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
            border-left: 4px solid #28a745;
            display: none;
        }

        /* Loading Animation */
        .loading {
            display: none;
            width: 20px;
            height: 20px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .register-btn.loading .loading {
            display: inline-block;
        }

        .register-btn.loading .btn-text {
            display: none;
        }

        /* Mobile Responsiveness */
        @media (max-width: 768px) {
            body {
                padding: 1rem 0;
            }

            .register-container {
                padding: 0 1rem;
            }

            .register-card {
                padding: 2rem 1.5rem;
                border-radius: 20px;
            }

            .back-home {
                top: 1rem;
                left: 1rem;
            }

            .logo {
                font-size: 1.8rem;
            }

            .register-title {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 480px) {
            .register-card {
                padding: 1.5rem 1rem;
            }
        }