html, body {
    height: 100%; /* Full height */
    margin: 0;
    display: flex;
    flex-direction: column;
}

.authentication-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

/* ✅ Centered Rectangle Box */
.authentication-box {
    background-color: white; /* Visible box */
    border: 1px solid #d1d5db;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    max-width: 40rem;
    width: 95%;
    text-align: center;
}

.logo-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 1rem 2rem;
}

.authentication-container h2 {
    margin-bottom: 2rem;
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
}

.authentication-options {
    width: 90%;
}

.button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 1rem;
    background-color: #e5e7eb;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    transition: background-color 0.2s;
}

.option-text {
    flex: 1;
    text-align: left;
    font-size: 1.375rem;
    font-weight: 600;
    padding-left: 2rem;
    color: #374151;
}

.button:hover {
    background-color: #d1d5db;
}

.button img {
    width: 48px;
    height: 48px;
}

.email-form {
    width: 90%;
}

.form-group {
    margin-bottom: 1.125rem;
}

.authentication-container label {
    display: block;
    font-size: 1.25rem;
    padding: 0.5rem;
}

.authentication-container input {
    width: 100%;
    padding: 0.75rem;
    font-size: 1.125rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    outline: none;
}

.authentication-container input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.75rem 0.5rem;
}

.checkbox-group input {
    width: 20px;
    height: 20px;
}

.submit-btn-container {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}

.submit-button {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1.25rem;
    font-weight: bold;
    color: #ffffff;
    background-color: #2563eb;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-button:hover {
    background-color: #1e40af;
}

.text-center {
    text-align: center;
    color: #374151;
    font-size: 1.125rem;
    margin: 0.5rem;
}

.text-center a {
    color: #2563eb;
    text-decoration: none;
}

.text-center a:hover {
    text-decoration: underline;
}

.text-center p {
    padding: 0.5rem;
}


.hidden { 
    display: none !important; 
}

.show {
    opacity: 1 !important;
    pointer-events: auto;
    transition: opacity 0.5s ease;
}

@media (max-width: 1080px) {
    .authentication-container {
        padding: 1rem 2rem;   
    }

    .logo-container {
        margin: 0 1rem 1rem;
    }

    .authentication-container h2 {
        margin-bottom: 0.5rem;
    }

    .authentication-options h2 {
        margin-bottom: 1.5rem
    }

    .form-group {
        margin-bottom: 0.5rem;
    }

    .checkbox-group {
        margin: 0.5rem 0.5rem;
    }

    .submit-btn-container {
        margin: 0.5rem 0;
    }

    .text-center p {
        padding: 0.375rem;
    }

}

@media (max-width: 810px) {
    .authentication-container{
        max-width: 80%;
    }

    .logo-container {
        margin: 0 1rem 2rem;
    }

    .authentication-container label{
        font-size: 1.5rem;
        padding: 1rem;
    }

    .authentication-container input {
        font-size: 1.375rem;
    }

    .submit-btn-container {
        margin: 1rem 0;
    }

    .submit-button {
        font-size: 1.5rem;
    }

    .text-center {
        font-size: 1.375rem;
        margin: 1.5rem;
    }

    .text-center p {
        padding: 0.5rem;
    }
}

@media (max-width: 576px) {
    .authentication-container {
        max-width: 90%;
        padding: 1rem 1rem;
    }

    .logo-container {
        margin: 0 1rem 1rem;
    }

    .logo-container {
        margin: 0 1rem 1rem;
        width: 80%;
    }

    .authentication-container h2 {
        font-size: 2rem;
        margin-bottom: 0;
    }

    .authentication-options h2 {
        font-size: 2rem;
        margin-bottom: 1.5rem
    }

    .email-form {
        width: 100%;
    }

    .authentication-container label {
        font-size: 1.125rem;
        padding: 0.5rem;
    }

    .authentication-container input {
        font-size: 1.125rem;
        padding: 0.5rem;
    }

    .submit-button {
        font-size: 1.25rem;
    }

    .submit-btn-container {
        margin: 0.75rem 0;
    }

    .text-center {
        font-size: 1rem;
        margin: 1.5rem 0;
    }

    .text-center p {
        padding: 0.25rem;
    }

    .authentication-options {
        width: 100%;
    }

    .button {
        padding: 0.5rem;
    }

    .option-text {
        font-size: 1.25rem;
        padding-left: 1rem;
    }
}