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

        :root {
            --primary-color: #0e9eff;
            --primary-dark: #0077cc;
            --text-dark: #1a1a1a;
            --text-gray: #666;
            --bg-light: #f8f9fa;
            --white: #ffffff;
            --shadow: 0 2px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(14, 158, 255, 0.15);
            --gradient: linear-gradient(135deg, #0e9eff 0%, #0077cc 100%);
            --success: #00c853;
            --error: #ff4757;
        }

        body {
            font-family: 'Cairo', sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--gradient);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px 20px;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
            opacity: 0.3;
        }

        .register-container {
            position: relative;
            z-index: 1;
            width: 100%;
            max-width: 500px;
            background: var(--white);
            border-radius: 30px;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .register-header {
            text-align: center;
            padding: 50px 40px 30px;
            background: var(--white);
        }

        .logo {
            font-size: 42px;
            font-weight: 900;
            color: var(--primary-color);
            margin-bottom: 15px;
        }

        .register-header h1 {
            font-size: 32px;
            font-weight: 900;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .register-header p {
            font-size: 16px;
            color: var(--text-gray);
        }

        .register-form {
            padding: 0 40px 40px;
        }

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

        .form-label {
            display: block;
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .form-label .required {
            color: var(--error);
        }

        .input-wrapper {
            position: relative;
        }

        .form-input {
            width: 100%;
            padding: 15px 20px;
            padding-right: 50px;
            border: 2px solid #e0e0e0;
            border-radius: 12px;
            font-size: 15px;
            font-family: 'Cairo', sans-serif;
            transition: all 0.3s;
            background: var(--white);
            color: var(--text-dark);
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(14, 158, 255, 0.1);
        }

        .form-input.error {
            border-color: var(--error);
        }

        .form-input.success {
            border-color: var(--success);
        }

        .input-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            color: var(--text-gray);
            pointer-events: none;
        }

        .password-toggle {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-gray);
            cursor: pointer;
            padding: 5px;
            transition: color 0.3s;
        }

        .password-toggle:hover {
            color: var(--primary-color);
        }

        .error-message {
            display: none;
            color: var(--error);
            font-size: 13px;
            margin-top: 8px;
            font-weight: 600;
        }

        .error-message.show {
            display: block;
        }

        .success-message {
            display: none;
            color: var(--success);
            font-size: 13px;
            margin-top: 8px;
            font-weight: 600;
        }

        .success-message.show {
            display: block;
        }

        .password-strength {
            margin-top: 10px;
        }

        .strength-bar {
            height: 4px;
            background: #e0e0e0;
            border-radius: 50px;
            overflow: hidden;
            margin-bottom: 5px;
        }

        .strength-fill {
            height: 100%;
            width: 0;
            transition: all 0.3s;
            border-radius: 50px;
        }

        .strength-fill.weak {
            width: 33%;
            background: var(--error);
        }

        .strength-fill.medium {
            width: 66%;
            background: #ffa500;
        }

        .strength-fill.strong {
            width: 100%;
            background: var(--success);
        }

        .strength-text {
            font-size: 12px;
            font-weight: 600;
        }

        .strength-text.weak {
            color: var(--error);
        }

        .strength-text.medium {
            color: #ffa500;
        }

        .strength-text.strong {
            color: var(--success);
        }

        .checkbox-group {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 25px;
        }

        .checkbox-input {
            width: 20px;
            height: 20px;
            cursor: pointer;
            accent-color: var(--primary-color);
        }

        .checkbox-label {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
        }

        .checkbox-label a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 700;
        }

        .checkbox-label a:hover {
            text-decoration: underline;
        }

        .submit-btn {
            width: 100%;
            padding: 16px;
            background: var(--gradient);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            font-family: 'Cairo', sans-serif;
            margin-bottom: 20px;
        }

        .submit-btn:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(14, 158, 255, 0.3);
        }

        .submit-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .divider {
            display: flex;
            align-items: center;
            gap: 15px;
            margin: 30px 0;
            color: var(--text-gray);
            font-size: 14px;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: #e0e0e0;
        }

        .social-login {
            display: flex;
            gap: 15px;
            margin-bottom: 30px;
        }

        .social-btn {
            flex: 1;
            padding: 14px;
            background: var(--white);
            border: 2px solid #e0e0e0;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            font-family: 'Cairo', sans-serif;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .social-btn:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }

        .login-link {
            text-align: center;
            font-size: 15px;
            color: var(--text-gray);
            padding-top: 20px;
            border-top: 1px solid #e0e0e0;
        }

        .login-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 700;
        }

        .login-link a:hover {
            text-decoration: underline;
        }

        /* Success Modal */
        .success-modal {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            padding: 20px;
        }

        .success-modal.show {
            display: flex;
        }

        .modal-content {
            background: var(--white);
            border-radius: 20px;
            padding: 50px;
            max-width: 400px;
            text-align: center;
            animation: slideUp 0.3s ease;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .success-icon {
            width: 80px;
            height: 80px;
            background: var(--success);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 40px;
            color: white;
        }

        .modal-content h2 {
            font-size: 28px;
            font-weight: 900;
            margin-bottom: 15px;
            color: var(--text-dark);
        }

        .modal-content p {
            font-size: 16px;
            color: var(--text-gray);
            margin-bottom: 30px;
        }

        .modal-btn {
            padding: 14px 40px;
            background: var(--gradient);
            color: white;
            border: none;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            font-family: 'Cairo', sans-serif;
        }

        .modal-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(14, 158, 255, 0.3);
        }

        /* Responsive */
        @media (max-width: 640px) {
            body {
                padding: 20px;
            }

            .register-container {
                border-radius: 20px;
            }

            .register-header {
                padding: 40px 30px 25px;
            }

            .logo {
                font-size: 36px;
            }

            .register-header h1 {
                font-size: 26px;
            }

            .register-form {
                padding: 0 30px 30px;
            }

            .social-login {
                flex-direction: column;
            }

            .modal-content {
                padding: 40px 30px;
            }
        }