:root {
  --bg: #0f1115;
  --panel: #181b22;
  --line: #262b36;
  --text: #e6e9ef;
  --muted: #8b93a3;
  --accent: #5b8cff;
  --user: #7dd3fc;
  --assistant: #a7f3d0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}
header h1 { margin: 0; font-size: 18px; }
header p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
main { max-width: 820px; margin: 0 auto; padding: 24px; }
.setup {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px; margin-bottom: 18px;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
}
.field select, .field input {
  background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 12px; font-size: 14px; outline: none;
}
.field select:focus, .field input:focus { border-color: var(--accent); }
.field-desc { margin: 2px 0 0; color: var(--muted); font-size: 12px; min-height: 15px; }
.controls { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
button {
  background: var(--accent);
  color: white; border: 0; border-radius: 8px;
  padding: 10px 22px; font-size: 15px; font-weight: 600; cursor: pointer;
}
button:hover { filter: brightness(1.1); }
#status { color: var(--muted); font-size: 13px; }
.metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px;
}
.metric {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px;
}
.metric .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.metric .value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.metric .unit { color: var(--muted); font-size: 13px; font-weight: 400; }
#transcript {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; height: 340px; overflow-y: auto;
}
.line { margin-bottom: 10px; display: flex; gap: 10px; }
.line .who {
  flex: 0 0 74px; color: var(--muted); font-size: 12px; text-transform: uppercase;
  padding-top: 2px;
}
.line.user .txt { color: var(--user); }
.line.assistant .txt { color: var(--assistant); }