html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
  box-sizing: border-box;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100svh;
}

.buttons {
  display: flex;
  gap: 2em;
  padding: 2em;
  justify-content: center;
  align-items: center;
  width: 80vw;
  font-size: min(3vw, 32px);
}

.button {
  font-size: 1em;
  outline: none;
  background-color: #bfbfbf;
  border: 0.2em solid #000;
  color: #000;
  padding: 1em;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  cursor: pointer;
  border-radius: 0.6em;
  width: 6em;
  height: 4em;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  transition: background-color 0.25s ease-in-out, color 0.25s ease-in-out;
}

.button:disabled {
  opacity: 0.8;
  color: #666666;
  background-color: #eee;
  cursor: not-allowed;
}

.button--startStop:focus {
  outline: solid #df636378 4px;
}

.button--startStop:hover:not(:disabled) {
  background-color: #df636378;
}

.button--startStop {
  background-image: url('https://img.icons8.com/ios/452/record.png');
}

.button--startStop.button--active {
  background-image: url('https://img.icons8.com/ios/452/stop.png');
  border-color: #c00;
}

.button--play {
  background-image: url('https://img.icons8.com/ios/452/play.png');
}

.button--play:focus {
  outline: solid #63df6978 4px;
}

.button--play:hover:not(:disabled) {
  background-color: #63df6978;
}

.button--reverse {
  transform: rotate(180deg);
}

.button--play.button--active {
  border-color: #3c6;
}