.leaderboard {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(43, 127, 255, 0.15);
}

.leaderboard__title {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.leaderboard__sub {
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  max-width: 62ch;
}

.leaderboard__table-wrap {
  overflow: auto;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(43, 127, 255, 0.12);
  background: var(--surface);
}

.leaderboard__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.leaderboard__table th,
.leaderboard__table td {
  text-align: left;
  padding: 0.45rem 0.65rem;
  border-bottom: 1px solid rgba(43, 127, 255, 0.08);
}

.leaderboard__table th {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--surface-muted);
}

.leaderboard__table tbody tr:last-child td {
  border-bottom: none;
}

.leaderboard__empty,
.leaderboard__err {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.leaderboard__err {
  color: var(--warn);
}

.leaderboard__form {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  border: 1px solid rgba(43, 127, 255, 0.15);
}

.leaderboard__form-title {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.leaderboard__form-sub {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.leaderboard__field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.55rem;
}

.leaderboard__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.leaderboard__time-val {
  font-size: 1.1rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.leaderboard__input {
  border: 2px solid var(--accent-soft);
  border-radius: 8px;
  padding: 0.45rem 0.55rem;
  background: var(--surface);
}

.leaderboard__form-msg {
  margin: 0.35rem 0 0;
  min-height: 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.leaderboard__form-msg[data-kind="ok"] {
  color: var(--ok);
}

.leaderboard__form-msg[data-kind="warn"] {
  color: var(--warn);
}

.leaderboard__form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.leaderboard__hp {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.math-platform--embed .leaderboard {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
}

.math-platform--embed .leaderboard__sub {
  font-size: 0.78rem;
}