style.css

body {
    font-family: 'Roboto';
    font-weight: 400;
    font-size: 20pt;
    margin: 0px;
}

.container {
    width: 90%;
    display: flex;
    margin-top: 2rem;
    margin-bottom: 2rem;
    margin-left: auto;
    margin-right: auto;
    flex-direction: column;
    align-items: center;
}

textarea {
    width: 100%;
    height: 45%;
    font-family: 'Roboto';
    font-weight: 400;
    font-size: 20pt;
    margin-bottom: 5rem;
    resize: vertical;
    border: none;
    background-color: lightgray;
    border-radius: 10px;
    padding: 15px;
}

textarea::-webkit-scrollbar {
    width: 15px;
}

textarea::-webkit-scrollbar-thumb {
    background: #888;
}

textarea::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.output {
    border: none;
    background-color: lightgray;
    border-radius: 10px;
    width: 100%;
    height: auto;
    font-family: 'Roboto';
    font-weight: 400;

}

.bold {
    font-weight: 900;
}

.controls {
    margin-bottom: 2rem;
    margin-right: auto;
}

.option {
    margin-bottom: 0.5rem;
}

@media (max-width: 800px) {

    textarea#input {
        height: 45vh !important;
    }

    .output {
        height: 45vh !important; 
    }
}