body {
  font-family: "Inter", "Roboto", "Helvetica Neue", sans-serif;
  font-size: 14px;
  color: #222;
}

textarea.code {
  height: 320px;
  width: 640px;
  font-family: ui-monospace, Consolas, monospace;
  background: #fafafa;

  font-size: smaller;
  tab-size: 4;
}

.panel {
  margin: 2px;
  display: inline-block;
  vertical-align: top;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid #b35a00;
  background: linear-gradient(#ffb347, #ff8c00);
  box-shadow:
    inset 0 1px 0 #fff8,
    0 3px 8px #0004;
}

.panel p {
  margin: 1px;
}

.panel input[type="button"],
.panel button,
.panel select {
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid #b35a00;
  cursor: pointer;
  background: linear-gradient(145deg, #ffd700, #ff8c00);
  font-weight: bold;
  box-shadow:
    inset 0 2px 0 #fff7,
    0 2px 6px #0003;
  transition: 0.15s;
}

.panel input[type="button"]:hover,
.panel button:hover,
.panel select:hover {
  background: linear-gradient(145deg, #fff176, #ffa000);

  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.9),
    inset 0 -2px 6px rgba(0, 0, 0, 0.25),
    0 4px 12px rgba(255, 165, 0, 0.6);

  transform: translateY(-1px);
}

.panel input[type="button"]:active,
.panel button:active {
  transform: translateY(1px);
}

.hidden {
  display: none;
}