/* Reference examples stay below the answer and grading controls. */
.usage-reference {
  min-width: 0;
  padding: 24px 28px 28px;
  border-top: 1px solid #e5eaf1;
  background: #fff;
}
.usage-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 14px;
}
.usage-heading h3 {
  margin: 0;
  color: var(--ink, #263348);
  font-size: 15px;
  line-height: 1.6;
  font-weight: 700;
}
.usage-source-tag {
  color: #778397;
  font-size: 12px;
  line-height: 1.6;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.usage-table-wrap {
  width: 100%;
  min-width: 0;
  overflow: hidden;
  border: 1px solid #dfe5ed;
  border-radius: 10px;
  background: #fff;
}
.usage-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  text-align: left;
}
.usage-table th,
.usage-table td {
  padding: 14px 16px;
  vertical-align: top;
  overflow-wrap: anywhere;
  word-break: normal;
  white-space: normal;
}
.usage-table tr > :nth-child(1) { width: 32%; }
.usage-table tr > :nth-child(2) { width: 28%; }
.usage-table tr > :nth-child(3) { width: 40%; }
.usage-table thead th {
  padding-top: 11px;
  padding-bottom: 11px;
  background: #f7f9fc;
  color: #667085;
  font-size: 12px;
  line-height: 1.6;
  font-weight: 600;
}
.usage-table tbody tr > * {
  border-top: 1px solid #e8edf3;
}
.usage-table tbody th {
  color: #263348;
  font-family: 'Noto Sans KR', 'Noto Sans JP', sans-serif;
  font-size: 17px;
  line-height: 1.7;
  font-weight: 500;
}
.usage-table tbody td {
  color: #526075;
  font-size: 13px;
  line-height: 1.8;
  font-weight: 400;
}
.usage-word {
  color: #263348;
  font-family: 'Noto Sans KR', 'Noto Sans JP', sans-serif;
  font-size: 17px;
  line-height: 1.7;
  font-weight: 500;
}
.usage-table .usage-sentence {
  margin: 9px 0 0;
  padding-top: 9px;
  border-top: 1px solid #edf0f5;
  color: #667085;
  font-size: 13px;
  line-height: 1.8;
  font-weight: 400;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.usage-sentence-label {
  display: block;
  margin-bottom: 3px;
  color: #8a95a5;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px;
  line-height: 1.6;
  font-weight: 400;
}
.usage-hit {
  padding: 0 1px;
  border-radius: 3px;
  background: #fff0be;
  color: inherit;
}
.usage-empty,
.usage-error {
  margin: 0;
  color: #667085;
  font-size: 13px;
  line-height: 1.8;
}
.usage-error + .button,
.usage-error .button { margin-top: 10px; }

@media (max-width: 720px) {
  .usage-reference { padding: 20px 16px 22px; }
  .usage-heading { margin-bottom: 12px; gap: 6px 12px; }
  .usage-heading h3 { font-size: 14px; }
  .usage-source-tag { font-size: 12px; }
  .usage-table th,
  .usage-table td { padding: 12px 9px; }
  .usage-table tr > :nth-child(1) { width: 33%; }
  .usage-table tr > :nth-child(2) { width: 30%; }
  .usage-table tr > :nth-child(3) { width: 37%; }
  .usage-table thead th { padding: 10px 9px; font-size: 12px; }
  .usage-table tbody th,
  .usage-word { font-size: 15px; line-height: 1.75; }
  .usage-table tbody td { font-size: 12px; line-height: 1.8; }
  .usage-table .usage-sentence { margin-top: 8px; padding-top: 8px; font-size: 12px; line-height: 1.8; }
}

@media (max-width: 374px) {
  .usage-table th,
  .usage-table td,
  .usage-table thead th { padding-left: 7px; padding-right: 7px; }
}

/* Character references reveal available sentences below each word. */
.usage-compact .usage-table tr > :nth-child(1) { width: 38%; }
.usage-compact .usage-table tr > :nth-child(2) { width: 31%; }
.usage-compact .usage-table tr > :nth-child(3) { width: 31%; }
.usage-compact .usage-table th,
.usage-compact .usage-table td { padding-top: 10px; padding-bottom: 10px; }
.usage-compact .usage-word > .speech-button { margin: 0 0 0 4px; }
.usage-expandable { cursor: pointer; }
.usage-expandable:hover,
.usage-expandable:focus-within { background: #f7faff; }
.usage-expanded { background: #f7faff; }
.usage-word-toggle {
  display: inline;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: none;
  color: inherit;
  font: inherit;
  text-align: inherit;
}
.usage-example-row[hidden] { display: none; }
.usage-table .usage-example-row > td {
  width: auto;
  padding: 0 16px 14px;
  border-top: 0;
  background: #f7faff;
}
.usage-example-content {
  padding: 12px 14px;
  border: 1px solid #e1eaf7;
  border-radius: 8px;
  background: #fff;
}
.usage-table .usage-example-content .usage-sentence {
  margin: 0;
  padding: 0;
  border: 0;
  color: #263348;
  font-size: 14px;
}
.usage-table .usage-example-content .usage-sentence + .usage-sentence {
  margin-top: 9px;
  color: #667085;
  font-size: 13px;
}
@media(max-width:720px) {
 .usage-compact .usage-table th,
 .usage-compact .usage-table td { padding-top: 8px; padding-bottom: 8px; }
 .usage-table .usage-example-row > td { padding: 0 9px 10px; }
 .usage-example-content { padding: 10px 12px; }
}