/* Rust for Humans — retention widget styling (quiz + flashcards).
   Uses mdBook theme variables so it adapts to light/dark automatically. */

.rfh-quiz,
.rfh-review {
  margin: 1.25rem 0 2rem;
}

.rfh-muted {
  color: var(--fg-subtle, #888);
  font-style: italic;
}

/* ---------- Quiz ---------- */
.rfh-quiz-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.rfh-score {
  font-size: 0.9rem;
  color: var(--fg-subtle, #888);
}
.rfh-score-perfect {
  color: #2e9e46;
  font-weight: 600;
}

.rfh-q {
  border: 1px solid var(--table-border-color, #ddd);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  margin: 0.75rem 0;
  background: var(--quote-bg, rgba(120, 120, 120, 0.06));
}
.rfh-q-text {
  font-weight: 600;
  margin: 0 0 0.6rem;
}
.rfh-opts {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.rfh-opt {
  text-align: left;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--table-border-color, #ccc);
  border-radius: 8px;
  background: var(--bg, #fff);
  color: inherit;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.12s, border-color 0.12s;
}
.rfh-opt:hover:not(:disabled) {
  border-color: var(--links, #4763b8);
  background: rgba(71, 99, 184, 0.08);
}
.rfh-opt:disabled {
  cursor: default;
}
.rfh-opt.rfh-correct {
  border-color: #2e9e46;
  background: rgba(46, 158, 70, 0.14);
}
.rfh-opt.rfh-wrong {
  border-color: #d64545;
  background: rgba(214, 69, 69, 0.14);
}
.rfh-opt.rfh-chosen {
  font-weight: 600;
}
.rfh-explain {
  display: none;
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--table-border-color, #ddd);
  font-size: 0.92rem;
  line-height: 1.5;
}
.rfh-explain-show {
  display: block;
}
.rfh-reset {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  background: none;
  border: none;
  color: var(--fg-subtle, #888);
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
}

/* ---------- Buttons (shared) ---------- */
.rfh-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--table-border-color, #ccc);
  border-radius: 8px;
  background: var(--bg, #fff);
  color: inherit;
  cursor: pointer;
  font-size: 0.9rem;
}
.rfh-btn:hover {
  border-color: var(--links, #4763b8);
}
.rfh-btn-primary {
  background: var(--links, #4763b8);
  color: #fff;
  border-color: transparent;
}
.rfh-btn-active {
  background: rgba(71, 99, 184, 0.14);
}
.rfh-good {
  border-color: #2e9e46;
  color: #2e9e46;
}
.rfh-bad {
  border-color: #d64545;
  color: #d64545;
}

/* ---------- Flashcards / review ---------- */
.rfh-review-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.rfh-review-count {
  flex: 1 1 auto;
  font-size: 0.88rem;
  color: var(--fg-subtle, #888);
}
.rfh-stage {
  min-height: 240px;
  display: flex;
  align-items: stretch;
}
.rfh-card {
  flex: 1 1 auto;
  border: 1px solid var(--table-border-color, #ddd);
  border-radius: 14px;
  padding: 1.5rem;
  background: var(--quote-bg, rgba(120, 120, 120, 0.06));
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}
.rfh-card-topic {
  align-self: flex-start;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  background: var(--links, #4763b8);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}
.rfh-card-front {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.45;
}
.rfh-card-back {
  font-size: 1rem;
  line-height: 1.55;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--table-border-color, #ccc);
}
.rfh-flip {
  align-self: flex-start;
}
.rfh-card-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: auto;
}
.rfh-card-actions .rfh-btn {
  flex: 1 1 0;
  font-weight: 600;
}
.rfh-done {
  flex: 1 1 auto;
  text-align: center;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
}
.rfh-done p {
  margin: 0;
}