:root {
  color-scheme: light dark;
  --background: #f4f5f3;
  --surface: #fff;
  --text: #222c29;
  --muted: #55635d;
  --border: #b6c1bb;
  --accent: #285d49;
  --button-text: #fff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 48px 16px;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}
main { width: 100%; max-width: 480px; margin: 0 auto; }
h1 { margin: 0 0 12px; font-size: 32px; font-weight: 650; letter-spacing: -0.03em; }
.note { margin: 0 0 32px; color: var(--muted); }
label { display: block; margin-bottom: 8px; font-weight: 600; }
input {
  width: 100%; min-height: 48px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font: inherit;
}
.actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
button {
  min-height: 48px; padding: 10px 20px; border: 1px solid transparent;
  border-radius: 8px; background: var(--accent); color: var(--button-text);
  font: inherit; font-weight: 600; cursor: pointer;
}
button.secondary { background: var(--surface); border-color: var(--border); color: var(--text); }
button[aria-pressed="true"] { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
#status { margin: 28px 0 0; overflow-wrap: anywhere; }
.speaking { min-height: 24px; margin: 8px 0 0; color: var(--muted); font-size: 14px; }
@media (prefers-color-scheme: dark) {
  :root {
    --background: #19211e; --surface: #252f2a; --text: #edf1ee;
    --muted: #b4c3ba; --border: #64766b; --accent: #a8d6ba; --button-text: #192c21;
  }
}