.duel-challenge {
  position: fixed;
  z-index: calc(var(--z-modal) + 2);
  top: 22vh;
  left: 50%;
  transform: translateX(-50%);
  width: min(360px, calc(100vw - 32px));
  padding: 14px 16px;
  background: var(--surface-panel);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.56);
  color: var(--color-text);
  font-family: var(--font-mono);
}

.duel-challenge-title {
  color: var(--color-text-strong);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: 8px;
}

.duel-challenge-body {
  font-size: var(--text-sm);
  line-height: 1.45;
}

.duel-challenge-countdown {
  margin-top: 10px;
  color: var(--color-accent);
  font-size: var(--text-sm);
}

.duel-challenge-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 14px;
}

.duel-challenge-button {
  min-width: 86px;
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font: inherit;
  cursor: pointer;
}

.duel-challenge-button:hover,
.duel-challenge-button:focus {
  border-color: var(--color-accent);
  color: var(--color-text-strong);
  outline: none;
}

.duel-challenge-button--primary {
  background: var(--color-accent-fill);
  border-color: var(--color-accent);
  color: var(--color-text-strong);
}