* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #f5f7fa 0%, #e6edf4 100%);
  color: #102030;
  font-family: "Segoe UI", Tahoma, sans-serif;
}

.shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px;
}

h1 {
  margin: 4px 0 8px;
}

#status {
  margin: 0 0 16px;
  color: #36526b;
}

#ptt {
  width: 100%;
  border: 0;
  border-radius: 16px;
  padding: 24px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  background: #0d6efd;
}

#ptt.recording {
  background: #c62828;
}

.panel {
  margin-top: 16px;
  border-radius: 12px;
  background: #fff;
  padding: 14px;
  box-shadow: 0 4px 18px rgba(16, 32, 48, 0.08);
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 16px;
}

.panel p {
  margin: 0;
  white-space: pre-wrap;
}