.rating-choice { min-width: 0; display: flex; flex-direction: column; gap: 8px; text-align: center; }
.rating-interval { display: block; min-height: 1.4em; font-size: 14px; color: #c6d4cd; overflow-wrap: anywhere; }
.rating-choice button { width: 100%; flex: 1; min-width: 0; }
.rating-choice button:disabled, .reveal-answer:disabled { opacity: .5; cursor: wait; }
.fsrs-settings-note { grid-column: 1 / -1; color: #aebbb5; line-height: 1.6; }
.study-empty { padding: 24px 8px; text-align: center; line-height: 1.7; }
.study-empty button { margin-top: 20px; }
@media (max-width: 480px) {
  .rating-buttons { gap: 6px; }
  .rating-interval { font-size: 11px; }
  .rating-choice button { font-size: 10px; padding: 12px 2px; overflow-wrap: anywhere; }
  .rating-choice small { font-size: 10px; }
}