/* Per-topic difficulty controls. Keep each target large enough for touch and keyboard use. */
.difficulty-rating {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}

.difficulty-rating .difficulty-label {
  margin-right: 4px;
  color: var(--ink, #3d2a20);
  font-size: .9rem;
  font-weight: 700;
}

.difficulty-rating button,
.difficulty-filter button {
  min-width: 44px;
  min-height: 44px;
  padding: 5px 8px;
  border: 2px solid transparent;
  border-radius: 12px;
  color: #9a7b3b;
  background: transparent;
  font: inherit;
  font-size: 1.45rem;
  line-height: 1;
  cursor: pointer;
}

.difficulty-rating button:hover,
.difficulty-rating button:focus-visible,
.difficulty-filter button:hover,
.difficulty-filter button:focus-visible {
  border-color: var(--berry, #a44b4b);
  outline: none;
}

.difficulty-rating button[aria-pressed="true"] {
  color: #c58d16;
}

.difficulty-rating button:not([aria-pressed="true"]) {
  color: #cbbda2;
}

.difficulty-rating .difficulty-value {
  min-width: 4.2rem;
  margin-left: 4px;
  color: var(--ink, #3d2a20);
  font-size: .82rem;
  white-space: nowrap;
}

.difficulty-topic-control {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.difficulty-topic-control > .difficulty-control-label {
  font-weight: 700;
}

.difficulty-topic-control .difficulty-rating {
  gap: 1px;
}

.difficulty-topic-control .difficulty-rating .difficulty-label {
  display: none;
}

.difficulty-topic-control .difficulty-rating .difficulty-value {
  font-size: .9rem;
}

.difficulty-filters {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  margin: 0 0 14px;
}

.difficulty-filters legend {
  width: 100%;
  margin-bottom: 2px;
  color: var(--ink, #3d2a20);
  font-weight: 700;
}

.difficulty-filter {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  min-height: 44px;
  padding: 0 9px;
  border: 2px solid rgba(122, 74, 40, .18);
  border-radius: 13px;
  color: var(--ink, #3d2a20);
  background: var(--cream, #fff9de);
  font: inherit;
  cursor: pointer;
}

.difficulty-filter[aria-pressed="true"] {
  border-color: var(--green, #356447);
  background: #eef3d7;
}

.difficulty-filter .filter-stars {
  color: #c58d16;
  letter-spacing: .05em;
}

.difficulty-filter .filter-count {
  min-width: 1.4em;
  margin-left: 3px;
  text-align: center;
}

.difficulty-status {
  margin: 0 0 12px;
  font-size: .92rem;
}

.difficulty-empty {
  margin: 24px 0;
  padding: 20px;
  border: 2px dashed rgba(122, 74, 40, .25);
  border-radius: 16px;
  text-align: center;
}

.card.card-topic {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 16px 18px;
  border-radius: 18px;
  background: var(--cream);
  box-shadow: 0 4px 0 rgba(122, 74, 40, 0.16);
}

.card.card-topic:hover {
  filter: brightness(1.03);
}

.card-topic .card-link b {
  display: block;
  margin: 6px 0;
  font-family: "ZCOOL KuaiLe", "PingFang SC", sans-serif;
  font-size: 1.25rem;
}

.card-topic .card-link p {
  margin: 0;
  line-height: 1.5;
}

.card-topic .card-link {
  display: block;
  flex: 1 1 auto;
  color: inherit;
  text-decoration: none;
}

.card-topic .card-link:focus-visible {
  outline: 3px solid var(--berry, #a44b4b);
  outline-offset: 4px;
  border-radius: 8px;
}

.card-topic .difficulty-rating {
  align-self: flex-start;
  padding-top: 2px;
  border-top: 1px solid rgba(122, 74, 40, .14);
}

.card-question {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border-radius: 18px;
  background: var(--cream);
  box-shadow: 0 4px 0 rgba(122, 74, 40, 0.16);
}

.card-question:hover { filter: brightness(1.03); }

.card-question .card-link {
  display: block;
  flex: 1 1 auto;
  color: inherit;
  text-decoration: none;
}

.card-question .card-link:focus-visible {
  outline: 3px solid var(--berry, #a44b4b);
  outline-offset: 4px;
  border-radius: 8px;
}

.card-question .card-link b {
  display: block;
  margin: 6px 0;
  font-family: "ZCOOL KuaiLe", "PingFang SC", sans-serif;
  font-size: 1.08rem;
  line-height: 1.35;
}

.card-question .card-link p {
  margin: 0;
  line-height: 1.5;
}

.card-question .difficulty-rating {
  align-self: flex-start;
  padding-top: 2px;
  border-top: 1px solid rgba(122, 74, 40, .14);
}

#questionDifficulty {
  margin: 6px 0 8px;
}

#questionDifficulty .difficulty-rating {
  gap: 1px;
}

#questionDifficulty .difficulty-label,
#questionDifficulty .difficulty-value {
  color: inherit;
}

.card-topic .difficulty-rating .difficulty-label {
  font-size: .8rem;
}

@media (max-width: 520px) {
  .difficulty-rating .difficulty-value {
    min-width: auto;
  }
}

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