/* Original source quiz only. Parent controls navigation, auth and data access. */
.textbook-source-quiz{box-sizing:border-box;min-width:0;max-width:100%;background:#fff;color:#18212f;font-family:inherit;font-size:16px;line-height:1.8;text-align:left;overflow-wrap:anywhere}
.textbook-source-quiz *{box-sizing:border-box}
.textbook-source-quiz-title{font-size:24px;line-height:1.5;margin:0 0 10px}
.textbook-source-quiz-reference{font-size:16px;line-height:1.6;font-weight:700;margin:0 0 10px;color:#0a3c82}
.textbook-source-quiz-help,.textbook-source-quiz-note{font-size:16px;line-height:1.65;margin:6px 0;color:#475569}
.textbook-source-quiz-subtopic{font-size:20px;line-height:1.6;margin:28px 0 12px;color:#0a3c82}
.textbook-source-quiz-item{min-width:0;max-width:100%;margin:0 0 14px;padding:18px;border:1px solid #c3cfdd;border-radius:12px;background:#fff}
.textbook-source-quiz-item-source{font-size:12px;line-height:1.6;margin:0 0 10px;color:#64748b}
.textbook-source-quiz-subtopic{scroll-margin-top:100px}
.textbook-source-quiz-toc{padding:10px 14px;margin:16px 0;border:1px solid #cbd5e1;border-radius:8px;background:#f8fafc}
.textbook-source-quiz-toc summary{cursor:pointer;min-height:44px;font-weight:600}
.textbook-source-quiz-toc a{display:block;padding:10px 0;color:#0a3c82;font-size:16px}
.textbook-source-quiz-statement{font-size:17px;line-height:1.9;white-space:pre-wrap;overflow-wrap:anywhere}
.textbook-source-quiz-blank{display:inline-flex;align-items:center;gap:7px;max-width:100%;margin:6px 0;vertical-align:middle;white-space:normal}
.textbook-source-quiz-paren{font-size:18px;line-height:1.5}
.textbook-source-quiz .textbook-source-quiz-input{min-width:0;width:210px;max-width:calc(100vw - 112px);min-height:44px;padding:7px 10px;border:1px solid #71839b;border-radius:6px;background:#fff;color:#18212f;font-family:inherit;font-size:16px;line-height:1.5}
.textbook-source-quiz-events{list-style:none;margin:12px 0;padding:12px 14px;border:1px solid #c3cfdd;border-radius:6px;background:#f7f9fc;font-size:16px;line-height:1.85}
.textbook-source-quiz-events li{margin:3px 0;white-space:pre-wrap}
.textbook-source-quiz-controls{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 0}
.textbook-source-quiz-controls button{min-height:44px;max-width:100%;padding:8px 14px;border:1px solid #0a3c82;border-radius:7px;background:#0a3c82;color:#fff;font-family:inherit;font-size:16px;font-weight:600;line-height:1.5;cursor:pointer;white-space:normal}
.textbook-source-quiz-controls .textbook-source-quiz-reveal{background:#fff;color:#0a3c82}
.textbook-source-quiz button:focus-visible,.textbook-source-quiz input:focus-visible{outline:3px solid #0a3c82;outline-offset:3px}
.textbook-source-quiz button:disabled,.textbook-source-quiz input:disabled{opacity:.65;cursor:not-allowed}
.textbook-source-quiz-status{font-size:16px;line-height:1.6;margin:10px 0 0;min-height:0;color:#475569}
.textbook-source-quiz-status:empty{display:none}
.textbook-source-quiz-status[data-result=match]{color:#176037}
.textbook-source-quiz-status[data-result=different],.textbook-source-quiz-status[data-result=empty]{color:#864500}
.textbook-source-quiz-answer{font-size:17px;line-height:1.7;font-weight:700;white-space:pre-wrap;margin:12px 0 0;padding:12px;border-radius:6px;background:#eef4fc;color:#0a3c82}
.textbook-source-quiz [hidden]{display:none!important}
@media(max-width:480px){.textbook-source-quiz-item{padding:14px}.textbook-source-quiz-title{font-size:22px}.textbook-source-quiz-controls{gap:8px}.textbook-source-quiz-controls button{flex:1 1 130px}.textbook-source-quiz-blank{display:flex;width:max-content}}
@media(prefers-reduced-motion:reduce){.textbook-source-quiz *{scroll-behavior:auto}}
.textbook-source-player > .textbook-source-quiz-subtopic{margin:1rem 0}.textbook-source-quiz-stop{min-height:44px;padding:.6rem 1rem;border:1px solid #b9c5cf;border-radius:8px;background:#fff;color:#263c52;font:inherit;cursor:pointer}.textbook-source-quiz-check{min-height:44px}.textbook-source-review-filter{display:flex;align-items:center;gap:8px;min-height:44px;margin:1rem 0}.textbook-source-review-filter input{width:auto;min-height:24px;vertical-align:middle}.textbook-source-review-item{padding:1rem 0;border-bottom:1px solid #d6dfe6;overflow-wrap:anywhere}.textbook-source-review-item h4{margin:.3rem 0}.textbook-source-review-item p{white-space:pre-wrap}.textbook-source-player button:disabled{opacity:.65;cursor:wait}
/* Whole-era keyboard list: semantic source positions are kept; cards and per-item actions retire. */
.textbook-source-continuous .textbook-source-quiz-item{display:block;border:0;border-bottom:1px solid #e4e9ef;border-radius:0;padding:10px 0;margin:0;min-width:0;overflow-wrap:anywhere}
.textbook-joseon-section,.textbook-joseon-review{min-width:0;max-width:100%}
.textbook-joseon-heading{font-size:22px;line-height:1.5;color:#29482c;margin:24px 0 10px}
.textbook-joseon-subtopic{font-size:18px;line-height:1.6;margin:20px 0 6px;color:#36543b}
.textbook-joseon-section-common,.textbook-joseon-review-common{border-top:1px solid #8d9f80;border-bottom:1px solid #8d9f80;margin:24px 0;padding:2px 0 14px}
.textbook-joseon-section-common>.textbook-joseon-heading,.textbook-joseon-review-common>.textbook-joseon-heading{font-size:18px}
.textbook-joseon-section-late,.textbook-joseon-review-late{border-top:3px double #718660;padding-top:4px}
@media(max-width:480px){.textbook-joseon-heading{font-size:21px}.textbook-joseon-section-common{margin-block:20px}}
.textbook-source-continuous .textbook-source-quiz-item-source{display:inline;font-size:11px;color:#64748b;margin:0 8px 0 0;white-space:normal}
.textbook-source-continuous .textbook-source-quiz-statement{display:inline;font-size:16px;line-height:2.2;white-space:pre-wrap}
.textbook-source-continuous .textbook-source-quiz-blank{display:inline-flex;flex-wrap:wrap;align-items:center;gap:4px;margin:0 3px;max-width:100%;width:auto;vertical-align:middle}
.textbook-source-continuous .textbook-source-quiz-input{width:145px;max-width:calc(100vw - 110px);min-height:44px;padding:4px 7px}
.textbook-source-inline-feedback{display:inline-block;font-size:13px;line-height:1.5;max-width:100%;overflow-wrap:anywhere;color:#9b332a}
.textbook-source-inline-feedback[data-result=match]{color:#12603c}.textbook-source-inline-feedback:empty{display:none}
.textbook-source-list-controls{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.textbook-source-list-controls button,.textbook-source-quiz-resume{font:inherit;min-height:44px;padding:6px 10px;border:1px solid #9aabba;border-radius:6px;background:#fff;color:#163b69;cursor:pointer}
.textbook-source-progress{font-size:14px;color:#475569;margin:6px 0}.textbook-source-continuous .textbook-source-quiz-events{font-size:14px;padding:5px 10px;margin:4px 0;line-height:1.6}.textbook-source-continuous .textbook-source-quiz-events li{display:inline;margin-right:12px}
.textbook-source-continuous .textbook-source-quiz-help{font-size:14px}.textbook-source-continuous .textbook-source-quiz-item .textbook-source-quiz-help{display:inline;margin:0 6px}
@media(max-width:480px){.textbook-source-continuous .textbook-source-quiz-item{padding:9px 0}.textbook-source-continuous .textbook-source-quiz-statement{line-height:2.1}.textbook-source-continuous .textbook-source-inline-feedback{flex:0 1 auto}.textbook-source-continuous .textbook-source-quiz-input{width:128px}}

/* Keep the prompt, instructions, classification rows and choices on separate lines. */
.textbook-source-continuous .textbook-source-quiz-item-source{display:block;margin:0 0 6px}
.textbook-source-continuous .textbook-source-quiz-statement{display:block;margin:8px 0;white-space:pre-wrap;line-height:1.9}
.textbook-source-continuous .textbook-source-quiz-item .textbook-source-quiz-help{display:block;margin:12px 0;line-height:1.8;white-space:pre-wrap}
.textbook-source-continuous .textbook-source-quiz-events li{display:block;margin:8px 0;white-space:pre-wrap;line-height:1.8}
.textbook-source-continuous [data-source-subitem-id]{padding:8px 0;border-bottom:1px solid #e4e9ef}
.textbook-source-continuous [data-source-subitem-id]>label{display:block;margin-bottom:6px}
.textbook-source-continuous .textbook-source-quiz-item{padding:16px 0}
@media(max-width:480px){.textbook-source-continuous [data-source-subitem-id] .textbook-source-quiz-input{width:100%;max-width:100%;box-sizing:border-box}.textbook-source-continuous .textbook-source-quiz-statement{line-height:1.9}}

.textbook-source-quiz-instruction{font-size:20px;line-height:1.5;font-weight:700;margin:24px 0 12px;white-space:pre-wrap;overflow-wrap:anywhere;break-after:avoid}