.modal-dialog {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: auto;
}

.close {
    background: none;
    border: none;
    outline: none;
}

.close span {
    display: block;
    color: #000; 
    font-size: 24px;
}

.modal-content {
    background-color: white;
    color: #333; 
}

.form-group label {
    color: #333;
}

.form-control {
    border: 1px solid #ccc;
    border-radius: 4px;
}

.form-group {
    position: relative;
}

.btn {
    width: 120px;
    height: 32px;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1;
}

#phone, #email {
    margin-bottom: 1.5rem;
}

.validation-message {
    position: absolute;
    bottom: -20px;
    left: 0;
    color: red;
    font-size: 0.8rem;
    visibility: hidden;
}

.validation-message.active {
    visibility: visible;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.btn-secondary {
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary:hover {
    background-color: #545b62;
}

.btn:active {
    transform: scale(0.95);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); 
}

.btn:focus {
    outline: none !important;
    box-shadow: none !important;
}

.modal-header, .modal-footer, .modal-body {
    padding: 16px !important;
}

.log-in-button-left {
    margin-right: auto; 
    visibility: visible;
}

.log-in-button-left-hidden {
    visibility: hidden;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
}

.hidden {
    display: none;
}

@media (max-width: 320px) {
    .modal-dialog {
        max-width: 90%;
        margin: auto;
    }

    .modal-header, .modal-footer, .modal-body {
        padding: 6px !important;
    }

    .form-control {
        font-size: 0.85rem;
        padding: 0.375rem 0.75rem;
    }

    .btn {
        font-size: 0.85rem;
        width: 80px;
        height: 28px;
        display: flex;
        justify-content: center;
        align-items: center;
        line-height: 1;
    }

    #phone, #email {
        margin-bottom: 0.8rem;
    }
}

@media (min-width: 321px) and (max-width: 376px) {
    .modal-dialog {
        max-width: 300px;
        margin: auto;
    }
    
    .modal-header, .modal-footer, .modal-body {
        padding: 8px !important;
    }

    .form-control {
        font-size: 0.85rem;
        padding: 0.375rem 0.75rem;
    }

    .btn {
        font-size: 0.85rem;
        width: 70px;
        height: 28px;
        display: flex;
        justify-content: center;
        align-items: center;
        line-height: 1;
    }

    #phone, #email {
        margin-bottom: 1rem;
    }

    #phone-validation, #email-validation{
        margin-top: -1rem;
    }

}

@media (min-width: 376px) and (max-width: 426px) {
    .modal-dialog {
        max-width: 300px;
        margin: auto;
    }
    
    .modal-header, .modal-footer, .modal-body {
        padding: 10px !important;
    }

    .form-control {
        font-size: 0.9rem;
        padding: 0.375rem 0.75rem;
    }

    .btn {
        font-size: 0.9rem;
        width: 80px;
        height: 28px;
        display: flex;
        justify-content: center;
        align-items: center;
        line-height: 1;
    }

    #phone, #email {
        margin-bottom: 1rem;
    }

    #phone-validation, #email-validation{
        margin-top: -1rem;
    }
}

@media (min-width: 426px) and (max-width: 768px) {
    .modal-dialog {
        width: 60%;
        max-width: 400px;
        min-width: 330px;
        margin: auto;
    }

    .modal-header, .modal-footer, .modal-body {
        padding: 12px !important;
    }

    .form-control {
        font-size: 0.95rem;
        padding: 0.375rem 0.75rem;
    }

    .btn {
        font-size: 0.95rem;
        width: 100px;
        height: 30px;
        display: flex;
        justify-content: center;
        align-items: center;
        line-height: 1;
    }

    #phone, #email {
        margin-bottom: 1.3rem;
    }

    #phone-validation, #email-validation{
        margin-top: -1.3rem;
    }
}

@media (min-width: 426px) and (max-width: 582px) {
    .btn {
        font-size: 0.95rem;
        width: 80px !important;
        height: 28px !important;
        display: flex;
        justify-content: center;
        align-items: center;
        line-height: 1;
    }
}