pianometer/style.css

/*! style.css v1.0.0 | ISC License | https://github.com/ungoldman/style.css */
html {
    color: rgb(210, 209, 202);
    background-color: #202328;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "avenir next", avenir, "segoe ui", "fira sans", roboto, noto, "droid sans", "liberation sans", "lucida grande", "helvetica neue", helvetica, "franklin gothic medium", "century gothic", cantarell, oxygen, ubuntu, sans-serif;
    font-size: calc(14px + 0.25vw);
    line-height: 1.55;
    -webkit-font-kerning: normal;
    font-kerning: normal;
    text-rendering: optimizeLegibility;
    -webkit-font-feature-settings: "kern", "liga"1, "calt"0;
    font-feature-settings: "kern", "liga"1, "calt"0;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    height: 100%;
}

#main {
    display: flex;
    margin-top: 0.5rem;
    flex-wrap: wrap;
    justify-content: space-evenly;
    align-items: center;

}

#controls {
    width: 600px;
    height: 100%;
}

#piano-visualizer {
    margin-top: 0.2rem;
    margin-bottom: 1rem;
}

.center {
    text-align: center;
}

.left {
    text-align: left;
}

body {
    margin: 0;
    height: 100%;
}

article,
aside,
footer,
header,
nav,
section,
figcaption,
figure,
main {
    display: block;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

p,
blockquote,
ul,
ol,
dl,
table,
pre {
    margin-top: 0;
    margin-bottom: 1.25em;
}

small {
    font-size: 80%;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 500;
    line-height: 1.25em;
    margin-top: 0;
    margin-bottom: 0.5rem;
    position: relative;
    text-align: center;
    color: #ddd;
}

h1 small,
h2 small,
h3 small,
h4 small,
h5 small,
h6 small {
    color: #777;
    font-size: 0.7em;
    font-weight: 300;
}

h1 code,
h2 code,
h3 code,
h4 code,
h5 code,
h6 code {
    font-size: 0.9em;
}

h1 {
    font-size: 2.75em;
}

h2 {
    font-size: 2.25em;
}

h3 {
    font-size: 1.75em;
}

h4 {
    font-size: 1.5em;
}

h5 {
    font-size: 1.25em;
}

h6 {
    font-size: 1.15em;
    color: #575757;
}

p {
    letter-spacing: -0.01em;
}

a {
    background-color: transparent;
    -webkit-text-decoration-skip: objects;
    color: #0074d9;
    text-decoration: none;
}

a:active,
a:hover {
    outline-width: 0;
    outline: 0;
}

a:active,
a:focus,
a:hover {
    text-decoration: underline;
}

ul,
ol {
    padding: 0;
    padding-left: 2em;
}

ul ol,
ol ol {
    list-style-type: lower-roman;
}

ul ul,
ul ol,
ol ul,
ol ol {
    margin-top: 0;
    margin-bottom: 0;
}

ul ul ol,
ul ol ol,
ol ul ol,
ol ol ol {
    list-style-type: lower-alpha;
}

li>p {
    margin-top: 1em;
}

blockquote {
    margin: 0 0 1rem;
    padding: 0 1rem;
    color: #7d7d7d;
    border-left: 4px solid #d6d6d6;
}

blockquote> :first-child {
    margin-top: 0;
}

blockquote> :last-child {
    margin-bottom: 0;
}

b,
strong {
    font-weight: inherit;
    font-weight: 600;
}

mark {
    background-color: #ff0;
    color: #000;
}

sub,
sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sub {
    bottom: -0.25em;
}

sup {
    top: -0.5em;
}

code,
pre,
kbd,
samp {
    font-family: menlo, inconsolata, consolas, "fira mono", "noto mono", "droid sans mono", "liberation mono", "dejavu sans mono", "ubuntu mono", monaco, "courier new", monospace;
    font-size: 90%;
}

pre,
code {
    background-color: #f7f7f7;
    border-radius: 3px;
}

pre {
    overflow: auto;
    word-wrap: normal;
    padding: 1em;
    line-height: 1.45;
}

pre code {
    background: transparent;
    display: inline;
    padding: 0;
    line-height: inherit;
    word-wrap: normal;
}

pre code::before,
pre code::after {
    content: normal;
}

pre>code {
    border: 0;
    font-size: 1em;
    white-space: pre;
    word-break: normal;
}

code {
    padding: 0.2em 0;
    margin: 0;
}

code::before,
code::after {
    letter-spacing: -0.2em;
    content: '\00a0';
}

kbd {
    background-color: #e6e6e6;
    background-image: linear-gradient(#fafafa, #e6e6e6);
    background-repeat: repeat-x;
    border: 1px solid #d6d6d6;
    border-radius: 2px;
    box-shadow: 0 1px 0 #d6d6d6;
    color: #303030;
    display: inline-block;
    line-height: 0.95em;
    margin: 0 1px;
    padding: 5px 5px 1px;
}

td,
th {
    padding: 0;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
    display: block;
    width: 100%;
    overflow: auto;
    word-break: normal;
    word-break: keep-all;
}

table th,
table td {
    padding: 6px 13px;
    border: 1px solid #ddd;
}

table th {
    font-weight: bold;
}

table tr {
    background-color: #fff;
    border-top: 1px solid #ccc;
}

table tr:nth-child(2n) {
    background-color: #f8f8f8;
}

hr {
    box-sizing: content-box;
    overflow: visible;
    background: transparent;
    height: 4px;
    padding: 0;
    margin: 1em 0;
    background-color: #e7e7e7;
    border: 0 none;
}

hr::before {
    display: table;
    content: '';
}

hr::after {
    display: table;
    clear: both;
    content: '';
}

img {
    border-style: none;
    border: 0;
    max-width: 100%;
}

svg:not(:root) {
    overflow: hidden;
}

figure {
    margin: 1em 0;
}

figure img {
    background: white;
    border: 1px solid #c7c7c7;
    padding: 0.25em;
}

figcaption {
    font-style: italic;
    font-size: 0.75em;
    font-weight: 200;
    margin: 0;
}

abbr[title] {
    border-bottom: none;
    text-decoration: underline;
    text-decoration: underline dotted;
}

dfn {
    font-style: italic;
}

dd {
    margin-left: 0;
}

dl {
    padding: 0;
}

dl dt {
    padding: 0;
    margin-top: 1em;
    font-size: 1em;
    font-style: italic;
    font-weight: 600;
}

dl dd {
    padding: 0 1em;
    margin-bottom: 1.25em;
}

audio,
video {
    display: inline-block;
}

audio:not([controls]) {
    display: none;
    height: 0;
}

input {
    margin: 0;
}

button,
input,
optgroup,
select,
textarea {
    font-family: sans-serif;
    font-size: 100%;
    line-height: 1.15;
    margin: 0;
}

button,
input {
    overflow: visible;
}

button,
select {
    text-transform: none;
}

button,
html [type="button"],
[type="reset"],
[type="submit"] {
    -webkit-appearance: button;
}

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
    border-style: none;
    padding: 0;
}

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
    outline: 1px dotted ButtonText;
}

fieldset {
    border: 1px solid #c0c0c0;
    margin: 0 2px;
    padding: 0.35em 0.625em 0.75em;
}

legend {
    color: inherit;
    display: table;
    max-width: 100%;
    padding: 0;
    white-space: normal;
}

progress {
    display: inline-block;
    vertical-align: baseline;
}

textarea {
    overflow: auto;
}

[type="checkbox"],
[type="radio"] {
    padding: 0;
}

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
    height: auto;
}

[type="search"] {
    -webkit-appearance: textfield;
    outline-offset: -2px;
}

[type="search"]::-webkit-search-cancel-button,
[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
}

[disabled] {
    cursor: default;
}

::-webkit-file-upload-button {
    -webkit-appearance: button;
    font: inherit;
}

details,
menu {
    display: block;
}

summary {
    display: list-item;
}

canvas {
    display: inline-block;
}

template {
    display: none;
}

[hidden] {
    display: none;
}

input[type=checkbox] {
    height: 0;
    width: 0;
    visibility: hidden;
}

label[for=rainbow-mode-checkbox] {
    cursor: pointer;
    width: 50px;
    height: 25px;
    background: grey;
    display: inline-block;
    border-radius: 25px;
    position: relative;
    transition: .3s;
}

label[for=rainbow-mode-checkbox]:after {
    content: '';
    position: absolute;
    top: 1.25px;
    left: 1.25px;
    width: 22.5px;
    height: 22.5px;
    background: #fff;
    border-radius: 22.5px;
    transition: .3s;
}

input:checked + label[for=rainbow-mode-checkbox] {
	background: #6f42c1;
}

label[for=rainbow-mode-checkbox]:active:after {
	width: 32.5px;
}

input:checked + label[for=rainbow-mode-checkbox]:after {
	left: calc(100% - 1.25px);
	transform: translateX(-100%);
}