html, body {
  height: 100%;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

img {
  display: block;
}

form {
  background: #cecece;
  display: block;
  padding: 1rem;
}

form p {
  margin: .5rem 0;
}

input:not([type=checkbox]),
select {
  border: 1px solid #ccc;
  padding: .5rem;
}

[type=number] {
  width: 5rem;
}

[type=text] {
  transition: all 100ms;
}
[type=text][disabled], [type=text]:disabled {
  background: rgba(204, 204, 204, 0.6);
  border-color: rgba(204, 204, 204, 0.4);
  color: #ccc;
}

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}
fieldset[data-affect] {
  background: #eee;
  padding: 1rem;
}
fieldset[data-affect] legend {
  display: block;
  position: relative;
  top: 1.2rem;
}

fieldset.closed > div {
  max-height: 0;
}
fieldset > div {
  transition: max-height 250ms;
  height: auto;
  max-height: 1000px;
  overflow: hidden;
}

.flex-items > div {
  max-height: 3000px;
}

legend {
  font-weight: 900;
}

.trigger {
  cursor: pointer;
}
.trigger::after {
  content: '\2193';
  padding: 0 1rem;
  display: inline-table;
  vertical-align: top;
}
.closed .trigger::after {
  content: '\2191';
}

.note {
  color: #333;
  font-size: 1rem;
}
.note code {
  font-style: normal;
}

.demo {
  background: #607d8b;
  height: 600px;
  flex-direction: row;
}

form {
  float: left;
  width: 50%;
}

.demo-wrapper {
  border-right: 1rem solid #fffffe;
}

.col-2 {
  position: relative;
}
.col-2 h1 {
  text-align: center;
}

.demo-flex {
  display: flex;
  overflow-x: auto;
}
.demo-flex > * {
  flex: 0 1 50%;
}

.demo-flex li {
  min-height: 6rem;
  padding: 1rem;
}

.flex-item-id {
  font-size: 5rem;
  font-weight: bold;
  text-align: center;
}

.flex-item-id p {
  font-size: 1rem;
  font-weight: normal;
  text-align: left;
}

.alpha {
  background: #ffeb3b;
}

.beta {
  background: #03a9f4;
}

.gamma {
  background: #8bc34a;
}

.delta {
  background: #c654d9;
}

.epsilon {
  background: #eb3573;
}

.flex-shorthand {
  font-weight: bold;
}

.flex-basis-auto-wrap {
  white-space: nowrap;
}

@media screen and (max-width: 768px) {
  .demo {
    height: 400px;
    width: 400px;
  }

  select {
    display: block;
    width: 100%;
  }
}