body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #111;
  color: #f5f5f5;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 18px;
}

h1 {
  margin-bottom: 0;
}

.subtitle {
  margin-top: 4px;
  opacity: 0.8;
}

.card {
  background: #1e1e1e;
  border: 1px solid #333;
  border-radius: 12px;
  padding: 16px;
  margin: 14px 0;
}

button {
  font-size: 20px;
  padding: 14px;
  width: 100%;
  margin: 8px 0;
  border-radius: 10px;
  border: 0;
}

.smallBtn {
  font-size: 16px;
  width: auto;
  padding: 10px 14px;
  margin-right: 8px;
}

#connection,
#recorderStatus {
  margin: 12px 0;
  opacity: 0.9;
}

#state {
  font-size: 34px;
  font-weight: bold;
  text-align: center;
  padding: 18px;
  border-radius: 12px;
  margin: 12px 0;
}

.pressed {
  background: #5b1f1f;
}

.released {
  background: #1e3b24;
}

#timer {
  text-align: center;
  font-size: 42px;
  font-family: monospace;
}

#vu {
  width: 100%;
  background: #050505;
  border-radius: 8px;
  margin-top: 12px;
}

audio {
  width: 100%;
  margin-top: 8px;
}

.hint {
  opacity: 0.75;
  line-height: 1.35;
}

#rawLog, #sessionLog {
  white-space: pre-wrap;
  font-family: monospace;
  font-size: 14px;
  max-height: 360px;
  overflow: auto;
}

.session {
  border-bottom: 1px solid #444;
  padding: 10px 0;
}

.session div {
  margin-top: 8px;
}