jellyfin-web/src/elements/emby-textarea/emby-textarea.css

.emby-textarea {
    display: block;
    margin: 0;
    margin-bottom: 0 !important;
    /* Remove select styling */
    /* Font size must the 16px or larger to prevent iOS page zoom on focus */
    font-size: inherit;
    /* General select styles: change as needed */
    font-family: inherit;
    font-weight: inherit;
    color: inherit;
    padding: .35em .25em;
    /* Prevent padding from causing width overflow */
    box-sizing: border-box;
    outline: none !important;
    -webkit-tap-highlight-color: rgba(0,0,0,0);
    width: 100%;
}

    .emby-textarea::-moz-focus-inner {
        border: 0;
    }

.textareaLabel {
    display: inline-block;
    transition: all .2s ease-out;
    margin-bottom: .25em;
}

.emby-textarea + .fieldDescription {
    margin-top: .25em;
}