body {
  font-family: monospace;
  background: #111;
  color: #0f0;
  margin: 0;
  padding: 10px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  text-align: center;
}

.container {
  max-width: 700px;
  width: 100%;
  padding: 20px;
}

h2 {
  margin-bottom: 1em;
}

#keyboard {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.key {
  width: 40px;
  height: 120px;
  margin: 2px;
  border: 1px solid #0f0;
  background: #000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  cursor: pointer;
}

.key.active {
  background: #0f0;
  color: #000;
}

#log {
  background: #000;
  border: 1px solid #0f0;
  padding: 5px;
  height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  margin-top: 10px;
  text-align: left;
}

.controls {
  margin: 10px 0;
  display: flex;
  justify-content: center;
  gap: 20px;
}

canvas#scope {
  background: #000;
  border: 1px solid #0f0;
  display: block;
  margin: 0 auto 10px;
}