SingleFile/extension/ui/pages/panel.css

html,
body {
    height: 100%;
    font-family: sans-serif;
    font-size: 12px;
}

body {
    display: flex;
    flex-direction: column;
    margin: 0;
    height: 100%;
    overflow: hidden;
    background-color: #fbfbfb;
}

header {
    display: flex;
    flex-direction: row;
}

.tab {
    height: 30px;
    padding-top: 8px;
    padding-left: 8px;
    padding-right: 8px;
	opacity: .5;
	cursor: pointer;
}

.tab-selected {
    opacity: 1;
}

main {
    flex: 1;
}

iframe {
    height: 100%;
    width: 100%;
    border-width: 0;
}

@media (prefers-color-scheme: dark) {
    body {
		background-color: #38383d;
		color: #fdfdfd;
    }
}