.story-box {
  position: relative;
}

.story-box > div {
  flex: 1;
  min-width: 0;
  padding-right: 35px;
}

.story-sound {
  position: absolute;
  right: 10px;
  top: 10px;
  width: 36px;
  height: 36px;
  border: 1px solid #dfe5dc;
  border-radius: 8px;
  background: #fff;
  color: var(--green);
  display: grid;
  place-items: center;
}

.story-sound svg,
.known-btn svg {
  width: 18px;
}

.known-btn {
  width: 100%;
  height: 46px;
  border: 1px solid #b8cbbf;
  border-radius: 8px;
  background: #fff;
  color: var(--green);
  font-weight: 600;
  margin-top: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.known-btn:hover {
  background: #f1f8f3;
}

.back-memory-btn {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--green);
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 700;
}

.back-memory-btn:hover {
  background: #f1f8f3;
}

.back-memory-btn svg {
  width: 17px;
}

.return-view-btn {
  width: 100%;
  min-height: 48px;
  margin-top: 9px;
  border: 1px solid #b8cbbf;
  border-radius: 8px;
  background: #fff;
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
}

.return-view-btn:hover {
  background: #f1f8f3;
}

.return-view-btn svg {
  width: 18px;
}

.word-meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.previous-word-btn {
  min-height: 34px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 700;
}

.previous-word-btn:hover:not(:disabled) {
  background: #f1f8f3;
}

.previous-word-btn:disabled {
  color: #a8aaa4;
  background: #f5f4f0;
  cursor: not-allowed;
}

.previous-word-btn svg {
  width: 15px;
}

.course-count {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 11px;
}

.vocab-progress-label {
  color: var(--muted);
  font: 600 11px "DM Sans";
}

#word .word-prefix {
  color: #2979a8;
}

#word .word-root {
  color: var(--ink);
}

#word .word-suffix {
  color: var(--coral);
}

.word-parts-legend {
  min-height: 21px;
  margin-top: 8px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 12px;
  color: var(--muted);
  font-size: 11px;
}

.part-key {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.part-key::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--ink);
}

.part-key.prefix::before {
  background: #2979a8;
}

.part-key.suffix::before {
  background: var(--coral);
}

.usage-box {
  margin-top: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.usage-box summary {
  min-height: 44px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  list-style: none;
}

.usage-box summary::-webkit-details-marker {
  display: none;
}

.usage-box summary span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.usage-box summary svg {
  width: 17px;
}

.usage-box[open] summary > svg:last-child {
  transform: rotate(180deg);
}

.usage-list {
  border-top: 1px solid var(--line);
  padding: 5px 14px 10px;
}

.usage-item {
  padding: 9px 0;
}

.usage-item + .usage-item {
  border-top: 1px dashed var(--line);
}

.usage-item b {
  display: block;
  color: var(--ink);
  font: 700 13px "DM Sans", "Noto Sans SC";
}

.usage-item p {
  margin: 3px 0 0;
  color: var(--muted);
  font: 500 12px/1.5 "DM Sans", "Noto Sans SC";
}

.practice-box {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.practice-box summary {
  min-height: 44px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: #7b5410;
  font-size: 13px;
  font-weight: 700;
  list-style: none;
}

.practice-box summary::-webkit-details-marker { display: none; }
.practice-box summary span { display: inline-flex; align-items: center; gap: 7px; }
.practice-box summary svg { width: 17px; }
.practice-box[open] summary > svg:last-child { transform: rotate(180deg); }
.practice-list { border-top: 1px solid var(--line); padding: 12px 14px; }
.question-card + .question-card { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); }
.question-meta { display: flex; align-items: center; gap: 7px; margin-bottom: 7px; }
.question-tag { padding: 3px 6px; border-radius: 4px; background: #fff0ca; color: #7b5410; font-size: 10px; font-weight: 700; }
.question-tag.real { background: var(--green2); color: var(--green); }
.question-source { color: var(--muted); font-size: 10px; }
.question-stem { margin: 0 0 9px; font: 600 13px/1.55 "DM Sans", "Noto Sans SC"; }
.question-options { display: grid; gap: 6px; }
.question-option { min-height: 38px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; background: #faf9f6; color: var(--ink); text-align: left; font-size: 12px; }
.question-option:hover { border-color: #c6b47d; }
.question-option.correct { border-color: var(--green); background: #eef8f1; color: var(--green); font-weight: 700; }
.question-option.wrong { border-color: var(--coral); background: #fff1ee; color: var(--coral); }
.question-answer { margin: 8px 0 0; color: var(--green); font-size: 12px; font-weight: 700; }
.question-source-link { display: inline-block; margin-top: 7px; color: var(--green); font-size: 11px; }

/* Compact secondary content keeps the memory action visually dominant. */
.usage-box {
  margin-top: 9px;
  background: transparent;
  box-shadow: none;
}

.usage-box summary {
  min-height: 36px;
  padding: 0 11px;
  font-size: 12px;
}

.usage-box summary svg {
  width: 15px;
}

.usage-list {
  padding: 2px 11px 7px;
}

.usage-item {
  padding: 7px 0;
}

.practice-box {
  margin-top: 10px;
  background: #faf9f6;
  border-color: #e2ded3;
  box-shadow: none;
}

.practice-box summary {
  min-height: 42px;
  padding: 0 12px;
  color: var(--ink);
}

.practice-box summary span {
  gap: 8px;
}

.practice-box summary span svg {
  color: #9a6a17;
}

.practice-list {
  padding: 14px 12px 15px;
  background: #fff;
}

.question-card {
  padding: 0;
}

.question-card + .question-card {
  margin-top: 14px;
  padding-top: 14px;
}

.question-stem {
  margin-bottom: 10px;
  color: #34372f;
}

.question-options {
  grid-template-columns: 1fr;
  gap: 7px;
}

.question-option {
  min-height: 42px;
  padding: 9px 11px;
  background: #fff;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.ghost-btn + .practice-box {
  margin-top: 8px;
}

@media (max-width: 420px) {
  .dictation-head {
    align-items: flex-start;
  }

  .dictation-head small {
    max-width: 90px;
    text-align: right;
  }
}