:root{--canvas:#f5f2e9;--surface:#fffdf8;--text:#2d2b25;--muted:#696252;--accent:#87583a;--rule:#ccc5b8;--success:#286342;--success-bg:#eef7f0;--error:#9c392b;--error-bg:#fff1ed;--warning:#785215;--warning-bg:#fff6e5;--radius:13px;--font:-apple-system,BlinkMacSystemFont,"PingFang TC","Hiragino Sans","Noto Sans TC",sans-serif;color-scheme:light;font-family:var(--font);font-size:17px;line-height:1.65;color:var(--text);background:var(--canvas);font-synthesis:none;scrollbar-color:var(--muted) var(--canvas)}
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h3{color:var(--error);font-size:1.03rem}.feedback.correct h3{color:var(--success)}.feedback>p{font-size:.79rem;color:var(--muted);margin-top:5px}.answer-pair{margin:18px 0 0;display:grid;grid-template-columns:90px minmax(0,1fr);gap:9px 14px}.answer-pair dt{font-size:.76rem;color:var(--muted)}.answer-pair dd{margin:0;font-size:.95rem;overflow-wrap:anywhere}.answer-pair .standard{font-size:1.12rem;font-weight:600}.identification{margin-top:25px;padding-top:23px;border-top:1px solid var(--rule)}.identification h3{font-size:.9rem;margin-bottom:9px}.identification p{font-size:.91rem;line-height:1.9}.provenance{font-size:.75rem;color:var(--muted);margin-top:14px;line-height:1.9}.provenance a{color:var(--muted);margin-right:12px}.aliases{font-size:.75rem;margin-top:12px;color:var(--muted);overflow-wrap:anywhere}.tag{display:inline-block;border:1px solid var(--rule);padding:1px 7px;font-size:.75rem;border-radius:4px;color:var(--muted);vertical-align:middle;margin:0 0 3px 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var(--rule)}.correction-table th{color:var(--muted);font-weight:500}.correction-table td:first-child{min-width:140px}.table-wrap{overflow-x:auto}#storage-notice{padding:15px;border:1px solid var(--warning);background:var(--warning-bg);font-size:.8rem;border-radius:7px;margin-bottom:20px}.load-error{padding:25px;border:1px solid var(--error);border-radius:8px}.load-error p{margin:10px 0 15px}.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}
@media(min-width:1550px){.workspace{padding-top:54px}.sidebar{padding-top:53px}.panel{padding:34px 38px}}
@media(max-width:1100px){.app-shell{grid-template-columns:200px minmax(0,1fr)}.sidebar{padding-inline:16px}.regions{grid-template-columns:repeat(3,minmax(0,1fr))}.panel{padding:24px}.workspace{padding-inline:28px}}
@media(max-width:759px){:root{font-size:16px}.site-header{height:68px;padding:0 20px;gap:10px}.brand{gap:12px;font-size:.8rem}.brand-divider{height:20px}.app-shell{display:block;min-height:calc(100dvh - 68px)}.sidebar{padding:0 16px;border-right:0;border-bottom:1px solid var(--rule)}.sidebar-label,.sidebar-note{display:none}.sidebar nav{display:flex;gap:5px;overflow-x:auto;padding:9px 0}.sidebar nav a{flex-shrink:0;font-size:.8rem;min-height:44px;padding:8px 12px;gap:7px}.sidebar nav a span{font-size:.75rem}.sidebar nav a svg{display:none}.sidebar nav a[data-route="practice"] span,.sidebar nav a[data-route="guide"] span{display:none}.workspace{padding:28px 20px 18px}.page-lead{margin-bottom:22px}.page-lead p{font-size:.87rem;line-height:1.8}.lead-row{display:block}.plain-link{display:inline-block;margin-top:13px;min-height:32px}.panel{padding:21px 19px}.regions{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.choice{padding:10px;gap:7px;min-height:59px;font-size:.8rem}.choice input{width:16px;height:16px}.kind-options{gap:8px}.kind-options .choice{padding:8px 10px;font-size:.77rem}.practice-options{gap:20px;grid-template-columns:1fr}.field-group{margin-bottom:24px}.practice-options .field-group{margin-bottom:0}.extra-options{margin-top:25px;gap:8px 17px}.start-row{align-items:stretch;flex-direction:column;gap:16px}.start-row .primary{width:100%}.section-title h2{font-size:1.1rem}.section-title button{font-size:.75rem}.run-header{font-size:.75rem;gap:10px}.run-header button{font-size:.75rem;padding:8px 12px}.run-top{font-size:.75rem;margin-bottom:24px}.question-row{gap:15px;min-height:100px}.clock{min-width:58px}.clock strong{font-size:2.4rem}.question-context{font-size:.75rem}.question-name{font-size:1.48rem}.answer-input{font-size:1rem;min-height:57px}.answer-actions{gap:8px}.answer-actions .primary,.answer-actions .secondary{padding:10px 15px;font-size:.8rem}.feedback{padding:19px 16px}.answer-pair{grid-template-columns:1fr;gap:5px}.answer-pair dd+dt{margin-top:7px}.answer-pair .standard{font-size:1.03rem}.identification p{font-size:.87rem}.toolbar{gap:12px}.select-field{min-width:120px;flex:1}.search-field{flex-basis:100%}.filter-chip{padding:8px 13px;font-size:.77rem}.guide-item summary{padding:18px 0;gap:8px}.item-title strong{font-size:.94rem}.item-en{font-size:.78rem}.tag{font-size:.75rem}.source-block p,.source-block li{font-size:.83rem}footer{font-size:.75rem;display:block;margin-top:35px}footer a{display:inline-block;margin-top:8px}.summary-actions{gap:10px}.summary-actions>*{flex:1;white-space:nowrap}.summary-score{font-size:1.4rem}}
@media(max-width:359px){.workspace{padding-inline:14px}.site-header{padding-inline:16px}.panel{padding:18px 14px}.regions{grid-template-columns:repeat(2,minmax(0,1fr))}.sidebar{padding-inline:10px}.sidebar nav a{padding-inline:10px}.question-name{font-size:1.32rem}.clock strong{font-size:2.1rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.bone-sections .small{margin-bottom:4px}.bone-section-actions{display:flex;flex-wrap:wrap;gap:4px 20px;margin-bottom:10px}.bone-sections .choice{min-height:56px}.bone-sections .choice small{font-variant-numeric:tabular-nums}.filters-line+.bone-sections{margin-top:24px}.bone-sections .text-button{min-height:44px}

.bone-section-groups{display:grid;grid-template-columns:1fr 1fr;gap:20px}.bone-section-groups h3{font-size:.9rem;font-weight:550;margin-bottom:10px}.bone-sections{margin-bottom:26px}.select-field select:disabled{color:var(--muted);background:var(--canvas)}@media(max-width:1100px){.bone-section-groups{grid-template-columns:1fr}}
/* The atlas and mock exam inherit the existing Lumus paper surfaces. */
.figure-gallery{margin-top:28px;padding-top:24px;border-top:1px solid var(--rule)}
.anatomy-figure{margin:20px 0 28px;max-width:840px}
.anatomy-figure .figure-button,.mock-stage .mock-image-button{width:min(100%,calc(70dvh * var(--figure-ratio,1)))}
.mock-image-button{margin-inline:auto}
.figure-button{display:block;width:100%;padding:0;overflow:hidden;background:#fff;border:1px solid var(--rule);border-radius:7px;cursor:zoom-in;color:inherit;text-align:left}
.figure-button:disabled{cursor:wait;opacity:1}
.anatomy-photo{position:relative;display:block;width:100%;background:#fff;line-height:0}
.anatomy-photo img{display:block;width:100%;height:auto}
.anatomy-marker{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.anatomy-figure figcaption{margin-top:12px;font-size:.8rem;line-height:1.8;color:var(--muted);overflow-wrap:anywhere}
.figure-dialog{width:min(1180px,94vw);max-width:94vw;max-height:94dvh;padding:20px;background:var(--surface);color:var(--text);border:1px solid var(--rule);border-radius:13px;overflow:auto}
.figure-dialog::backdrop{background:rgb(27 23 18 / .72)}
.figure-dialog-toolbar{display:flex;justify-content:space-between;gap:12px;padding-bottom:16px}
.figure-viewport{overflow:auto;max-height:70dvh;scrollbar-color:var(--muted) var(--canvas)}
.figure-viewport .anatomy-photo{width:100%;max-width:100%;margin:auto}
.figure-viewport.zoomed .anatomy-photo{width:200%;max-width:none}
.figure-dialog-note{margin:16px 0 0;overflow-wrap:anywhere}
.mock-regions{grid-template-columns:repeat(4,minmax(0,1fr))}
.mock-regions .choice{align-items:center}
.mock-regions .choice span{min-width:0}
.mock-selection-actions{display:flex;flex-wrap:wrap;gap:20px;margin:4px 0 20px}
.mock-question-top{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:20px 0}
.mock-question-top h2{font-size:1.25rem;line-height:1.5}
.mock-stage{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(260px,1fr);gap:28px;align-items:start}
.mock-stage>div{min-width:0}
.mock-stage .small{margin-top:10px}
.mock-answer-column .answer-pair{grid-template-columns:1fr}
.mock-answer-column .answer-pair dt{margin-top:8px}
.mock-answer-column .answer-pair dd{margin:0}
.mock-answer-column .feedback{padding:20px;margin-top:24px}
.mock-answer-column .answer-actions{flex-wrap:wrap}
.mock-review-row{display:grid;grid-template-columns:minmax(140px,260px) 1fr;gap:24px;padding:28px 0;border-top:1px solid var(--rule)}
.mock-review-row>div{min-width:0}
.mock-review-row h3{margin-top:0}
.mock-review-row .provenance{overflow-wrap:anywhere}
@media(max-width:1100px){.mock-stage{grid-template-columns:1fr}.mock-regions{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:759px){.mock-regions{grid-template-columns:repeat(2,minmax(0,1fr))}.mock-stage{gap:20px}.figure-gallery{margin-top:24px;padding-top:20px}.figure-dialog{padding:12px}.figure-dialog-toolbar{gap:8px}.figure-dialog-toolbar button{padding:8px 12px}.mock-review-row{grid-template-columns:1fr;gap:16px}.mock-review-row .figure-button{max-width:420px}.mock-question-top{gap:12px}.mock-question-top h2{font-size:1.1rem}}
:root .regional-choices{grid-template-columns:repeat(4,minmax(0,1fr))}
.scope-mode{max-width:420px}.region-select-actions{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;margin-bottom:10px}.region-select-actions label{display:flex;align-items:center;gap:9px;min-height:44px;cursor:pointer;font-size:.9rem}.region-select-actions input{width:17px;height:17px;margin:0;accent-color:var(--accent)}.scope-help{margin-top:12px}.practice-options .small{margin-top:10px}.study-scope-controls .field-group:first-child{margin-top:10px}.study-scope-controls .choice:focus-within{outline:2px solid var(--accent);outline-offset:3px}
@media(max-width:1100px){:root .regional-choices{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* Chapter reading keeps the established paper, type and native disclosures. */
.learning-layout{display:grid;grid-template-columns:190px minmax(0,1fr);gap:36px;align-items:start}
.chapter-nav{position:sticky;top:24px;max-height:calc(100dvh - 48px);overflow:auto;padding-right:12px;font-size:.8rem}
.chapter-nav a{display:flex;gap:9px;align-items:baseline;min-height:44px;padding:9px 8px;text-decoration:none;color:var(--muted);border-radius:5px}
.chapter-nav a:hover{background:#ede8dc;color:var(--text)}
.chapter-nav a[aria-current]{background:#e9e2d5;color:var(--accent);font-weight:650}
.chapter-number{font-variant-numeric:tabular-nums;min-width:1.3em;color:inherit}
.chapter-region{margin-top:20px}
.chapter-region h2{font-size:.8rem;font-weight:650;margin:0 0 5px 8px;color:var(--text)}
.chapter-region ol{list-style:none;margin:0;padding:0}
.chapter-select{display:none}
.chapter-select label{display:block;font-size:.85rem;font-weight:650;margin-bottom:8px}
.chapter-select select{width:100%;min-height:48px;border:1px solid var(--rule);border-radius:7px;background:var(--surface);padding:10px 12px}
.learning-reader{min-width:0;overflow-wrap:anywhere}
.reader-lead h1{font-size:1.9rem}
.reader-lead>p{margin-top:14px;color:var(--muted)}
.reader-actions{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;margin-top:24px;font-size:.87rem}
.reading-action{display:inline-flex;align-items:center;min-height:48px;text-decoration:none}
.reader-section{margin-top:38px;padding-top:30px;border-top:1px solid var(--rule)}
.reader-section>h2{font-size:1.2rem;margin-bottom:16px}
.reader-section>p+p{margin-top:16px}
.reader-section>.plain-link{display:inline-block;margin-top:20px;white-space:normal}
.reader-coverage{padding:18px 0;font-size:.88rem}
.direction-list{margin:24px 0 0}
.direction-list>div{padding:18px 0;border-top:1px solid var(--rule)}
.direction-list dt{font-size:.9rem;font-weight:650;margin-bottom:7px}
.direction-list dd{margin:0;color:var(--muted);font-size:.9rem;line-height:1.85}
.reading-method{padding-left:1.5em;margin:0}
.reading-method li{padding:5px 0 9px 5px}
.learning-sources{margin-top:18px;font-size:.75rem;line-height:1.9;color:var(--muted);overflow-wrap:anywhere}
.learning-sources a{display:inline;color:var(--muted)}
.learning-sources a:hover{color:var(--accent)}
.chapter-outline{border-block:1px solid var(--rule);margin:26px 0 0;padding:20px 0;font-size:.85rem}
.chapter-outline>summary{font-size:.85rem;font-weight:650;min-height:44px;cursor:pointer;align-content:center}
.chapter-outline ol{margin:12px 0 0;padding-left:1.65em;columns:2;column-gap:24px}
.chapter-outline li{break-inside:avoid;padding:0 0 9px 2px}
.chapter-outline a{display:inline-block;line-height:1.7}
.learning-group{padding-top:36px;scroll-margin-top:20px}
.learning-group>h2{font-size:1.22rem}
.ordering-rule{margin-top:9px;color:var(--accent);font-size:.8rem}
.group-note{font-size:.88rem;line-height:1.9;margin:14px 0;color:var(--text)}
.learning-group .guide-list{margin-top:18px}
.learning-reader .guide-item{background:transparent;border-radius:0;border:0;border-bottom:1px solid var(--rule);margin:0}
.learning-reader .guide-item summary{padding:16px 4px;gap:12px}
.learning-reader .guide-item[open]>summary{background:#ede8dc}
.learning-reader .guide-item .item-body{padding:18px 4px 26px;border:0}
.learning-reader .item-title{gap:6px 10px}
.learning-reader .item-title strong{font-size:.93rem}
.learning-reader .item-en{font-size:.8rem}
.learning-reader .item-title .tag{font-size:.75rem}
.study-tag{border-style:dashed;background:transparent}
.study-note{font-size:.8rem;color:var(--muted);margin:24px 0 0;padding-top:16px;border-top:1px solid var(--rule)}
.learning-location{font-size:.8rem;line-height:1.8;margin-bottom:20px}
.learning-location>span{display:block;color:var(--muted);margin-top:5px}
.related-reading{margin:22px 0}
.related-reading>h3{font-size:.9rem}
.related-reading ul{margin:8px 0 0;padding-left:1.3em;font-size:.85rem}
.related-reading li{padding:4px 0}
.relationships{margin-top:24px}
.relationship{border-bottom:1px solid var(--rule);scroll-margin-top:20px}
.relationship:first-child{border-top:1px solid var(--rule)}
.relationship>summary{cursor:pointer;padding:18px 8px;font-weight:650;line-height:1.65;min-height:56px;font-size:.93rem}
.relationship[open]>summary{background:#ede8dc}
.relationship-body{padding:20px 8px 26px;line-height:1.9;font-size:.88rem}
.anatomy-path{display:flex;flex-wrap:wrap;gap:10px 0;list-style:none;padding:0;margin:20px 0;font-size:.8rem}
.anatomy-path li{display:flex;align-items:baseline;max-width:100%}
.anatomy-path li+li:before{content:'→';margin:0 10px;color:var(--muted)}
.anatomy-path a{display:inline-block;padding:5px 8px;background:#ede8dc;border-radius:4px;overflow-wrap:anywhere}
.relation-pairs,.branch-list{margin:24px 0}
.relation-pairs>div,.branch-list>div{display:grid;grid-template-columns:minmax(90px,1fr) minmax(0,2.5fr);gap:12px;padding:12px 0;border-top:1px solid var(--rule)}
.relation-pairs dt,.branch-list dt{font-weight:650}
.relation-pairs dd,.branch-list dd{margin:0;min-width:0}
.recall,.relation-links{margin-top:20px;font-size:.85rem}
.recall>summary,.relation-links>summary{cursor:pointer;min-height:44px;padding:10px 0;color:var(--accent)}
.recall p{padding:12px 0 8px}
.relation-links ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px 18px;padding:8px 0;margin:0}
.chapter-references .learning-sources{margin-top:0}
.chapter-references>p{margin-top:16px}
.chapter-pagination{display:flex;justify-content:space-between;gap:18px;margin-top:36px;padding:24px 0;border-top:1px solid var(--rule);font-size:.85rem}
.chapter-pagination a{min-height:44px;max-width:48%;display:inline-flex;align-items:center}
.guide-toolbar{display:grid;grid-template-columns:minmax(180px,2fr) repeat(3,minmax(120px,1fr));align-items:end}
.guide-toolbar .search-field,.guide-toolbar .select-field{min-width:0}
.guide-order-note{font-size:.8rem;color:var(--muted);margin-top:18px}
.guide-learning-group{margin-top:28px}
.guide-group-heading{padding-bottom:14px}
.guide-group-heading h2{font-size:1rem;line-height:1.65}
.guide-group-heading h2 a{text-decoration:none;color:var(--text)}
.guide-group-heading h2 a:hover{color:var(--accent);text-decoration:underline}
.guide-group-heading p{font-size:.8rem;color:var(--muted);margin-top:5px}
.guide-relation-results{margin:26px 0;padding:20px 0;border-block:1px solid var(--rule)}
.guide-relation-results>h2{font-size:1rem}
.guide-relation-results ul{font-size:.87rem;line-height:1.9;padding-left:1.3em;margin:12px 0 0}
.learn-entry,.learning-group,.reader-section{scroll-margin-top:20px}
@media(max-width:1180px){
 .learning-layout{grid-template-columns:minmax(0,1fr);gap:26px}
 .chapter-nav{display:none}
 .chapter-select{display:block}
 .guide-toolbar{grid-template-columns:repeat(2,minmax(0,1fr))}
 .guide-toolbar .search-field{grid-column:1/-1}
}
@media(max-width:759px){
 .reader-lead h1{font-size:1.65rem}
 .chapter-outline ol{columns:1}
 .reader-section{margin-top:30px;padding-top:24px}
 .learning-group{padding-top:30px}
 .reader-actions{align-items:flex-start;flex-direction:column}
 .relation-pairs>div,.branch-list>div{grid-template-columns:1fr;gap:4px}
 .guide-toolbar{grid-template-columns:minmax(0,1fr)}
 .guide-toolbar .search-field{grid-column:auto}
 .chapter-pagination{flex-direction:column;gap:8px}
 .chapter-pagination a{max-width:100%}
 .chapter-outline a{min-height:44px;display:inline-flex;align-items:center}
}