@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', sans-serif;
        }

        body {
            background-image: url('../image/bg.jpg');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 1rem;
        }

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

        @keyframes fadeIn {
            0% { opacity: 0; transform: translateY(20px); }
            100% { opacity: 1; transform: translateY(0); }
        }

        .form-message,
        .error-message,
        .password-strength {
            animation: slideIn 0.5s ease-in-out;
        }

        @keyframes slideIn {
            0% { opacity: 0; transform: translateY(-10px); }
            100% { opacity: 1; transform: translateY(0); }
        }

        #submit-btn {
            position: relative; /* Create positioning context for the spinner */
        }

        #submit-btn.loading .button-content {
            display: none; /* Hide button content during loading */
        }

        #submit-btn.loading::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 1.25rem; /* Slightly smaller spinner for better fit */
            height: 1.25rem;
            border: 3px solid #fff;
            border-top: 3px solid transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            z-index: 10; /* Ensure spinner is above other content */
        }

        @keyframes spin {
            0% { transform: translate(-50%, -50%) rotate(0deg); }
            100% { transform: translate(-50%, -50%) rotate(360deg); }
        }