:root {
            --primary-color: #4361ee;
            --primary-dark: #3a56d4;
            --secondary-color: #3f37c9;
            --success-color: #4cc9f0;
            --error-color: #f72585;
            --warning-color: #f8961e;
            --light-gray: #f8f9fa;
            --medium-gray: #e9ecef;
            --dark-gray: #6c757d;
            --darker-gray: #495057;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --box-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --gradient-primary: linear-gradient(135deg, #4361ee 0%, #3f37c9 100%);
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--light-gray);
            color: var(--darker-gray);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxwYXR0ZXJuIGlkPSJwYXR0ZXJuIiB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHBhdHRlcm5Vbml0cz0idXNlclNwYWNlT25Vc2UiIHBhdHRlcm5UcmFuc2Zvcm09InJvdGF0ZSg0NSkiPjxyZWN0IHdpZHRoPSIyMCIgaGVpZ2h0PSIyMCIgZmlsbD0icmdiYSgyNDgsIDI0OSwgMjUyLCAwLjAzKSIvPjwvcGF0dGVybj48L2RlZnM+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0idXJsKCNwYXR0ZXJuKSIvPjwvc3ZnPg==');
        }

        .register-container {
            width: 100%;
            max-width: 500px;
            padding: 1.5rem;
            margin: 2rem auto;
        }

        .register-card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow-lg);
            overflow: hidden;
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }

        .register-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 6px;
            background: var(--gradient-primary);
            z-index: 2;
        }

        .register-header {
            padding: 2rem 2rem 1.5rem;
            text-align: center;
            position: relative;
        }

        .register-header h2 {
            font-weight: 600;
            margin: 0;
            font-size: 1.75rem;
            color: var(--primary-color);
            position: relative;
            display: inline-block;
        }

        .register-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--success-color);
            border-radius: 3px;
        }

        .register-header p {
            margin-top: 0.75rem;
            color: var(--dark-gray);
            font-size: 0.9rem;
        }

        .register-body {
            padding: 0 2rem 2rem;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--darker-gray);
            font-size: 0.95rem;
        }

        .form-group label.required::after {
            content: ' *';
            color: var(--error-color);
        }

        .input-field {
            position: relative;
        }

        .input-field i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--dark-gray);
            font-size: 1rem;
            transition: var(--transition);
        }

        input[type="text"],
        input[type="password"],
        input[type="email"],
        input[type="tel"] {
            width: 100%;
            padding: 0.85rem 1rem 0.85rem 2.75rem;
            border: 1px solid var(--medium-gray);
            border-radius: var(--border-radius-sm);
            font-family: 'Poppins', sans-serif;
            font-size: 0.95rem;
            transition: var(--transition);
            background-color: var(--light-gray);
        }

        input[type="text"]:focus,
        input[type="password"]:focus,
        input[type="email"]:focus,
        input[type="tel"]:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
            background-color: white;
        }

        input[type="text"]:focus+i,
        input[type="password"]:focus+i,
        input[type="email"]:focus+i,
        input[type="tel"]:focus+i {
            color: var(--primary-color);
        }

        .password-toggle {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: var(--dark-gray);
            transition: var(--transition);
        }

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

        .btn {
            width: 100%;
            padding: 1rem;
            background: var(--gradient-primary);
            color: white;
            border: none;
            border-radius: var(--border-radius-sm);
            font-family: 'Poppins', sans-serif;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .btn:hover {
            background: linear-gradient(135deg, #3a56d4 0%, #3a0ca3 100%);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(67, 97, 238, 0.25);
        }

        .btn:active {
            transform: translateY(0);
        }

        .login-link {
            text-align: center;
            margin-top: 1.75rem;
            color: var(--dark-gray);
            font-size: 0.95rem;
        }

        .login-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }

        .login-link a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: var(--transition);
        }

        .login-link a:hover::after {
            width: 100%;
        }

        .message {
            padding: 1rem;
            border-radius: var(--border-radius-sm);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.95rem;
            animation: fadeIn 0.3s ease-out;
        }

        .error {
            background-color: rgba(247, 37, 133, 0.08);
            color: var(--error-color);
            border-left: 4px solid var(--error-color);
        }

        .success {
            background-color: rgba(76, 201, 240, 0.08);
            color: var(--success-color);
            border-left: 4px solid var(--success-color);
        }

        .password-strength {
            margin-top: 0.5rem;
            height: 6px;
            background: var(--medium-gray);
            border-radius: 3px;
            overflow: hidden;
        }

        .strength-bar {
            height: 100%;
            width: 0%;
            transition: var(--transition);
        }

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

        .strength-medium {
            background-color: var(--warning-color);
            width: 66%;
        }

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

        .strength-text {
            font-size: 0.8rem;
            color: var(--dark-gray);
            margin-top: 0.25rem;
            display: flex;
            justify-content: space-between;
        }

        .strength-text span {
            font-weight: 500;
        }

        .requirements {
            margin-top: 0.5rem;
            padding-left: 1.25rem;
            font-size: 0.8rem;
            color: var(--dark-gray);
        }

        .requirement {
            margin-bottom: 0.25rem;
            position: relative;
            display: flex;
            align-items: center;
        }

        .requirement i {
            margin-right: 0.5rem;
            font-size: 0.7rem;
        }

        .requirement.valid {
            color: var(--success-color);
        }

        .requirement.invalid {
            color: var(--dark-gray);
        }

        /* Animations */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulse {
            0% {
                transform: scale(1);
            }

            50% {
                transform: scale(1.05);
            }

            100% {
                transform: scale(1);
            }
        }

        .register-card {
            animation: fadeIn 0.5s ease-out;
        }

        .btn:hover {
            animation: pulse 1s infinite;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .register-container {
                padding: 1rem;
                margin: 1rem auto;
            }

            .register-header {
                padding: 1.5rem 1.5rem 1rem;
            }

            .register-body {
                padding: 0 1.5rem 1.5rem;
            }

            .register-header h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .register-header {
                padding: 1.25rem 1rem 0.75rem;
            }

            .register-body {
                padding: 0 1rem 1.25rem;
            }

            input[type="text"],
            input[type="password"],
            input[type="email"],
            input[type="tel"] {
                padding: 0.75rem 0.9rem 0.75rem 2.5rem;
                font-size: 0.9rem;
            }

            .btn {
                padding: 0.9rem;
                font-size: 0.95rem;
            }
        }

        /* Dark mode support */
        @media (prefers-color-scheme: dark) {
            body {
                background-color: #121212;
                color: #e0e0e0;
            }

            .register-card {
                background-color: #1e1e1e;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
            }

            input[type="text"],
            input[type="password"],
            input[type="email"],
            input[type="tel"] {
                background-color: #2d2d2d;
                border-color: #3d3d3d;
                color: #e0e0e0;
            }

            input[type="text"]:focus,
            input[type="password"]:focus,
            input[type="email"]:focus,
            input[type="tel"]:focus {
                background-color: #252525;
            }

            .form-group label {
                color: #d0d0d0;
            }

            .login-link {
                color: #a0a0a0;
            }

            .password-strength {
                background-color: #3d3d3d;
            }

            .requirements {
                color: #a0a0a0;
            }
        }