index.css

html[lang="ja"] .lang-en {
	display: none;
}

html:not([lang="ja"]) .lang-ja {
	display: none;
}

.operation-button {
	padding: 0.5em 1em;
}

#customBaudRateInput:not(.custom-selected) {
	display: none;
}

.field-grid {
	display: grid;
	grid-template-columns: auto 1fr;
}

.field-name {
	margin-right: 0.5em;
}

select, input[type="text"] {
	margin-bottom: 0.5em;
}

#fileToSendDropArea {
	display: flex;
	align-items: center;
	width: 100%;
	height: 100%;
	border: 1px solid black;
	box-sizing: border-box;
}

#dataToSendArea:not(.send-file-mode) #fileToSendDropArea {
	display: none;
}

#dataToSendArea.send-file-mode #textToSend {
	display: none;
}

#signalDetected:not(.detected) {
	display: none;
}

.basic-table {
	border: 1px solid black;
}

.basic-table th, .basicTable td {
	border: 1px solid black;
	padding: 0.2em 0.3em;
}