/* ---------- header ---------- */
header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 18px 28px 0;
  max-width: 760px;
  margin: 0 auto;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.brand a { color: inherit; text-decoration: none; }
.brand a:hover { color: var(--ink); }
.brand b { color: var(--accent); font-weight: 600; }


/* ---------- main ---------- */
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 28px 80px;
}

.progress {
  display: flex;
  gap: 4px;
  margin-bottom: 28px;
  height: 3px;
}
.progress > div { flex: 1; background: var(--line); border-radius: 1px; transition: background 200ms ease; }
.progress > div.done.right { background: var(--good); }
.progress > div.done.wrong { background: var(--bad); }


/* ---------- responsive ---------- */
@media (max-width: 540px) {
  .sentence { font-size: 21px; }
  .options { grid-template-columns: 1fr; }
  .opt { font-size: 16px; }
  main { padding: 20px 16px 60px; }
  header { padding: 14px 16px 0; }
  .stats { gap: 10px; font-size: 11px; }
  .card { padding: 22px 18px 20px; }
  .controls { flex-direction: column; align-items: stretch; gap: 16px; }
  .band-picker { justify-content: center; }
  .type-input { font-size: 17px; padding: 12px 14px; }
}