/* worksheet: styles of this feature only */
.worksheet { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.ws-head { display: flex; gap: 18px; align-items: center; }
.ws-score { font-family: var(--serif); line-height: 1; white-space: nowrap; }
.ws-score b { font-size: 44px; font-weight: 600; }
.ws-score span { font-size: 22px; color: var(--ink-2); }
.ws-summary { flex: 1; min-width: 0; }
.ws-title { font-weight: 650; font-size: 15px; margin-bottom: 6px; }
.ws-counts { display: flex; flex-wrap: wrap; gap: 6px; }
.ws-bar { height: 5px; margin-top: 10px; background: #e4dfd1; border-radius: 99px; overflow: hidden; }
.ws-bar i { display: block; height: 100%; background: var(--mastered); }

.ws-badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 99px; font-size: 12px; font-weight: 600; white-space: nowrap; background: #ebe7dc; color: var(--ink-2); }
.ws-badge.v-correct { background: #dcf0e7; color: #1f6b4f; }
.ws-badge.v-partly { background: #f9eccd; color: #8a6208; }
.ws-badge.v-incorrect { background: #f8e2df; color: #9b2f27; }

.ws-weak { margin-top: 14px; padding: 12px 14px; border-radius: 8px; background: #fbf4ee; border: 1px solid var(--cite-soft); }
.ws-weak h3 { margin: 0 0 6px; font-size: 14px; }
.ws-weak-row { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 6px 0; }
.ws-weak-row + .ws-weak-row { border-top: 1px solid var(--line); }
.ws-weak-row .btn { flex-shrink: 0; }

.ws-rows { display: grid; gap: 12px; margin-top: 14px; }
.ws-row { border: 1px solid var(--line); border-left: 4px solid var(--unknown); border-radius: 8px; padding: 12px 14px; background: #fffefb; min-width: 0; }
.ws-row.v-correct { border-left-color: var(--mastered); }
.ws-row.v-partly { border-left-color: var(--developing); }
.ws-row.v-incorrect, .ws-row.v-blank { border-left-color: var(--weak); }
.ws-row-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ws-mark { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; font-size: 13px; font-weight: 700; background: #ebe7dc; color: var(--ink-2); }
.ws-mark.v-correct { background: var(--mastered); color: #fff; }
.ws-mark.v-partly { background: var(--developing); color: #fff; }
.ws-mark.v-incorrect, .ws-mark.v-blank { background: var(--weak); color: #fff; }

.ws-crop { display: block; margin-top: 10px; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: #fff; max-width: 640px; }
.ws-crop img { display: block; width: 100%; height: auto; max-height: 260px; object-fit: contain; object-position: left top; }
.ws-text { margin-top: 8px; font-family: var(--serif); font-size: 15px; line-height: 1.55; color: var(--ink-2); }

.ws-answers { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.ws-answers > div { padding: 8px 12px; border-radius: 8px; font-family: var(--serif); font-size: 16px; min-width: 0; overflow-x: auto; }
.ws-given { background: #f3efe5; }
.ws-key { background: #eef6f1; }
.ws-row.v-correct .ws-given { background: #eef6f1; }
.ws-row.v-incorrect .ws-given, .ws-row.v-partly .ws-given { background: #fbeeec; }
.ws-mistake { margin-top: 10px; font-size: 14px; color: #9b2f27; }
.ws-mistake strong { color: #9b2f27; }
.ws-explain { margin: 8px 0 0; font-family: var(--serif); font-size: 15.5px; line-height: 1.6; }
.ws-worked { margin-top: 8px; font-size: 14px; }
.ws-worked summary, .ws-read summary { cursor: pointer; color: var(--indigo); font-weight: 550; }
.ws-read { margin-top: 6px; font-size: 12.5px; }
.ws-read summary { color: var(--ink-3); font-weight: 500; }
.ws-worked > div { margin-top: 6px; padding: 8px 12px; border-left: 3px solid var(--line-2); font-family: var(--serif); font-size: 15px; line-height: 1.7; }
.ws-actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.ws-more:empty { display: none; }
.ws-more { margin-top: 10px; }
.ws-solution { padding-top: 10px; border-top: 1px dashed var(--line-2); }

@media (max-width: 640px) {
  .worksheet { padding: 12px; }
  .ws-head { gap: 12px; }
  .ws-score b { font-size: 34px; }
  .ws-answers { grid-template-columns: 1fr; }
  .ws-weak-row { flex-direction: column; align-items: flex-start; }
}