client.css

html,body {
  padding: 0;
  margin: 0;
}

body {
  font-family: 'Lucida Grande', 'Trebuchet MS', 'Bitstream Vera Sans', Verdana, Helvetica, sans-serif;
  background: #e8e8e8;
}

:focus {
  outline: none !important;
}

div {
  box-sizing: border-box;
}

.root {
  padding: 20px;
}

.flex {
  flex: 1 1 auto;
}

#header {
  display: flex;
  flex-direction: row;
  align-items: center;
  padding: 10px 5px 20px;
  border-bottom: 1px solid #cccccc;
}

#header span {
  color: #ccc;
}

button,input {
  height: 32px;
  border: 1px solid;
  box-sizing: border-box;
  margin: 0px 5px;
  border-radius: 2px;
  font-size: 13px;
}

button {
  -margin-right: 10px;
}

button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #5c8ea9;
    background: #6f9bb2;
    color: #ffffff;
    font-size: 13px;
    line-height: 1em;
    padding: 0 12px;
    text-transform: uppercase;

    border: 1px solid #c7c7c7;
    background: #e8e8e8;
    color: #505050;
}

button.primary {
  border: 1px solid #5c8ea9;
  background: #6f9bb2;
  color: #ffffff;
}

input[type=number]{
  width: 50px;
  border: 1px solid #6f9bb2;
  -padding: 0px 6px;
  padding-left: 6px;
  line-height: 28px;
}

button[disabled] {
  opacity: 0.5;
}

button:hover {
  background: #e4e4e4;
}

button.primary:hover {
  background: #6aa6c5;
}

.apps {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  background: #e8e8e8;
  padding-top: 10px;
}

.app {
	width:50%;
	position: relative;
	display: block;
  flex: 1 1 auto;
  background: currentColor;
  margin: 10px;
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
}

.app header {
  position: relative;
  height: 30px;
  color: #202837;
  color: white;
  line-height: 30px;
  padding: 0px 10px;
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
  font-size: 12px;
  font-weight: bold;
  overflow: hidden;
}

.app footer {
  background: #e8e8e8;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  font-weight: bold;
  padding: 8px 0px;
}

.app span,.app i {
  padding: 0 0.5ex;
}

.app i {
  font-style: normal;
  font-weight: normal;
}

.app .small {
  font-size: 18px;
  padding: 4px;
  color: #8c8c8c;
}

.app .slower {
  color: #ff4747;
}

.app iframe {
  border: 2px solid currentColor;
  border-top: 0px;
  margin: 0;
  padding: 0;
  vertical-align: top;
  width: 100%;
  box-sizing: border-box;
  height: 440px;
  background: #e8e8e8;
}

.running .app:not(.running) {
  opacity: 0.4;
}

.app.running {
  border-color: currentColor;
}