:root {
    --document-bg: white;
    --fret-hover-color: yellow;
    --fret-fg-color-1: white;
    --fret-bg-color-1: red;
    --fret-fg-color-2: white;
    --fret-bg-color-2: green;
    --fret-fg-color-3: white;
    --fret-bg-color-3: blue;
    --fret-muted-fg-color: grey;
    --key-picker-interval-fg-color: grey;
    --key-picker-interval-fg-color-1: lightgrey;
    --key-picker-interval-fg-color-2: lightgrey;
    --key-picker-interval-fg-color-3: lightgrey;
}

body {
    color: black;
    background-color: var(--document-bg);
}

.hover {
    background-color: var(--fret-hover-color);
}

.click1 {
    color: var(--fret-fg-color-1);
    background-color: var(--fret-bg-color-1);
}

.click2 {
    color: var(--fret-fg-color-2);
    background-color: var(--fret-bg-color-2);
}

.click3 {
    color: var(--fret-fg-color-3);
    background-color: var(--fret-bg-color-3);
}

x-fretboard {
    display: block;
    float: left;
    padding-right: 1em;
    margin-right: 1em;
}

x-fretboard table {
    border-collapse: collapse;
}

x-fretboard thead {
    text-align: center;
}
x-fretboard thead .fret3,
x-fretboard thead .fret5,
x-fretboard thead .fret7 {
    font-weight: bold;
}

x-fretboard tbody .open {
    font-weight: bold;
}

x-fretboard td:not(:last-child) {
    border-right: 1px solid black;
}

x-fretboard tbody tr {
    border-top: 1px solid black;
}

x-fretboard tbody .selected {
    font-style: italic;
    text-align: center;
}

x-fretboard .muted {
    color: var(--fret-muted-fg-color);
}

x-key-picker {
    display: block;
}

x-key-picker .notes {
    padding-left: 0;
    list-style-position: outside;
    display: grid;
    grid-template-rows: 2;
    grid-template-columns: 2em 2em 2em 2em 2em 2em 2em;
    counter-reset: notes;
}

x-key-picker .notes li:before {
    display: grid;
    grid-row-start: 2;
    content: counter(notes, numeric);
    color: var(--key-picker-interval-fg-color);
    font-size: small;
    text-align: center;
}

x-key-picker .notes li.click1:before {
    color: var(--key-picker-interval-fg-color-1);
}

x-key-picker .notes li.click2:before {
    color: var(--key-picker-interval-fg-color-2);
}

x-key-picker .notes li.click3:before {
    color: var(--key-picker-interval-fg-color-3);
}

x-key-picker .notes li {
    display: grid;
    grid-row-start: 1;
    counter-increment: notes;
    text-align: center;
    cursor: pointer;
}

x-key-picker .chords {
    display: grid;
    grid-template-rows: 1;
    grid-template-columns: 3em 3em 3em 3em 3em 3em 3em 3em;
    padding-left: 0;
}

x-key-picker .chords li {
    display: grid;
}

x-chords-history {
    display: block;
}

x-chords-history:state(fresh) {
    background-color: yellow;
}