/* Important vocabulary uses the surrounding cream palette and natural heights. */
.yz-home .vocab{min-width:0;margin-top:20px;color:var(--ink)}
.vocab-heading{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:4px 16px}
.yz-home .vocab-heading h3{margin:0;font:700 24px/1.5 var(--round);border:0;background:none;padding:0;color:var(--ink)}
.vocab-heading>span,.vocab-intro,.vocab-summary,.vocab-storage-note{color:var(--ink-2);font-size:13px}
.vocab-filters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}
.vocab-filters label{display:flex;flex-direction:column;gap:4px;min-width:0;font-size:13px;font-weight:700}
.vocab-filters .vocab-search{grid-column:1/-1}
.vocab-filters input,.vocab-filters select{width:100%;min-width:0;max-width:100%;min-height:46px;border:1px solid var(--line-2);border-radius:12px;padding:10px;background:var(--paper);color:var(--ink);font:400 16px/1.5 var(--jp)}
.vocab-modes,.vocab-actions,.vocab-pagination{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.yz-home .vocab-button,.yz-home .vocab-turn{font:700 14px/1.6 var(--jp);border:1px solid var(--line-2);border-radius:12px;min-height:44px;padding:10px 16px;background:var(--paper-2);color:var(--ink);cursor:pointer}
.yz-home .vocab-button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.yz-home .vocab button:disabled{opacity:.45;cursor:default}
.vocab-results{display:grid;gap:16px;min-width:0}
.vocab-entry{min-width:0;border:1px solid var(--line-2);border-radius:18px;padding:20px;overflow-wrap:anywhere}
.vocab-meta{display:flex;flex-wrap:wrap;gap:5px 12px;color:var(--ink-2);font-size:12px}
.vocab-grade{color:#813f28}.vocab-tag{border-bottom:1px solid var(--line-2)}
:root[data-theme="night"] .vocab-grade{color:#ffd8c2}
.vocab-location{flex-basis:100%;font-size:11px;margin-top:3px}
.yz-home .vocab-definition h4{font-size:18px;line-height:1.5;margin:18px 0 5px;padding:0;color:var(--ink);background:none;border:0}
.vocab-definition p{white-space:pre-line;margin:6px 0 14px;line-height:1.9}
.vocab-definition .vocab-aliases{color:var(--ink-2);font-size:12px;line-height:1.6}
.vocab-definition .vocab-note{background:var(--paper-2);border-left:3px solid #b46b4e;border-radius:0 10px 10px 0;padding:12px;font-size:13px}
.vocab-definition .vocab-references{font-size:11px;color:var(--ink-2)}
.vocab-actions{margin-top:16px}.vocab-actions>button{flex:1}
.vocab-pagination{justify-content:space-between;margin-top:14px;font-size:13px}
.vocab-empty{padding:25px 10px;text-align:center}.vocab-empty button{margin:5px}
.vocab-card-count{font-family:var(--num);font-size:13px;color:var(--ink-2);text-align:center}
.yz-home .vocab-question{font:700 clamp(22px,5vw,32px)/1.6 var(--round);text-align:center;margin:35px 0 25px;border:0;background:none;padding:0}
.yz-home .vocab-turn{width:100%;background:var(--paper);border-style:dashed;margin-bottom:10px}
.vocab-message:empty{display:none}.vocab-message{color:var(--ng-ink)}
.vocab-formulas{border-top:1px solid var(--line-2);margin-top:25px;padding-top:16px;overflow-wrap:anywhere}
.vocab-formulas>summary{font-weight:700;cursor:pointer;min-height:44px;padding:8px 0}
.vocab-formula-list{display:grid;gap:14px}.vocab-formula-list article{padding:14px;border-radius:12px;background:var(--paper-2)}
.yz-home .vocab-formula-list h4{font-size:16px;margin:0 0 10px;background:none;border:0;padding:0}
.vocab-formula-list p{white-space:pre-line;font-size:14px;line-height:1.9}
.vocab-storage-note{font-size:11px;margin:20px 0 0}
@media(max-width:440px){.vocab-filters{grid-template-columns:minmax(0,1fr)}.vocab-entry{padding:15px}.vocab-modes>button{flex:1;padding:10px 6px}.vocab-heading>span{font-size:12px}}

.vocab-mode-current{font-weight:700;font-size:14px;margin-right:auto}
.vocab-modes{margin-top:18px}
.yz-home .vocab-flash-front{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;min-height:260px;width:100%;padding:28px 16px;border:0;border-radius:16px;background:var(--paper-2);color:var(--ink);cursor:pointer;margin:16px 0;animation:vocab-flip-in .22s ease-out}
.yz-home .vocab-flash-front .vocab-question{margin:0;overflow-wrap:anywhere}
.vocab-flash-hint{font-size:13px;color:var(--ink-2)}
.vocab-card #vocab-answer:not([hidden]){animation:vocab-flip-in .22s ease-out}
@keyframes vocab-flip-in{from{opacity:.3;transform:rotateY(-12deg)}to{opacity:1;transform:rotateY(0)}}

/* The original document is displayed as complete pages within the viewport. */
.vocab-book{box-sizing:border-box;width:min(1100px,96vw);height:94dvh;min-width:0;max-width:100vw;max-height:100dvh;padding:0;overflow:hidden;border:1px solid var(--line-2);border-radius:20px;background:var(--mist);color:var(--ink);font-family:var(--jp)}
.vocab-book[open]{display:grid;grid-template:auto minmax(0,1fr) auto / minmax(0,1fr)}
.vocab-book>*,.vocab-book-header>*,.vocab-book-top>*,.vocab-book-tools>*,.vocab-book-footer>*{min-width:0;max-width:100%}
.vocab-book::backdrop{background:rgba(20,18,15,.65)}
.vocab-book-header{display:grid;grid-template-columns:minmax(0,1fr);gap:8px;padding:10px 16px;background:var(--paper);border-bottom:1px solid var(--line-2)}
.vocab-book-top{display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:8px}
.vocab-book-top>strong{font-family:var(--round);font-size:18px;overflow-wrap:anywhere}
.vocab-book-status{font-size:12px;color:var(--ink-2)}
.vocab-book-tools{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:8px;width:100%;min-width:0}
.vocab-book-tools select{width:100%;max-width:100%;min-width:0;padding:8px;border:1px solid var(--line-2);border-radius:10px;background:var(--paper);color:var(--ink);font:inherit;text-overflow:ellipsis}
.vocab-book-body{display:grid;grid-template:minmax(0,1fr) / minmax(0,1fr);width:100%;min-width:0;min-height:0;overflow:hidden;overscroll-behavior:contain;padding:8px}
.vocab-book-page{position:relative;width:100%;height:100%;min-width:0;min-height:0;max-width:none;margin:0;padding:0;border:0;overflow:hidden;background:transparent;box-shadow:none}
.vocab-book-page .vocab-book-scan{display:block;width:100%;height:100%;min-width:0;min-height:0;max-width:100%;max-height:100%;object-fit:contain;object-position:center}
.vocab-book-load{position:absolute;inset:0;display:grid;align-content:center;justify-items:center;gap:12px;margin:0;padding:16px;text-align:center;background:var(--mist);color:var(--ink-2)}
.vocab-book-body.is-zoomed{display:block;overflow:auto}
.vocab-book-body.is-zoomed .vocab-book-page{width:150%;height:auto;max-width:none;overflow:visible}
.vocab-book-body.is-zoomed .vocab-book-scan{width:100%;height:auto;max-width:none;max-height:none;object-fit:initial}
.vocab-book-footer{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:10px 16px;padding-bottom:max(10px,env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--line-2)}
.vocab-book-jump{display:flex;justify-content:center;align-items:center;gap:6px;font-size:12px}
.vocab-book-jump input{width:62px;min-height:44px;border:1px solid var(--line-2);background:var(--paper);border-radius:10px;color:var(--ink);font-size:16px;padding:5px}
@media(max-width:600px){
 .vocab-book{inset:0;margin:0;width:100vw;height:100dvh;border:0;border-radius:0}
 .vocab-book-header{padding:6px 10px;gap:4px}.vocab-book-status{font-size:11px}
 .vocab-book-tools{gap:6px}.vocab-book-top>strong{font-size:16px}
 .vocab-book-body{padding:4px}
 .vocab-book-footer{gap:6px;padding:6px;padding-bottom:max(6px,env(safe-area-inset-bottom))}
 .yz-home .vocab-book .vocab-button{padding:8px 10px;font-size:13px}
 .vocab-book-jump{gap:4px}.vocab-book-jump input{width:52px}
}
@media(max-width:400px){
 .vocab-book-footer{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
 .vocab-book-footer>.vocab-button:first-child{grid-row:1;grid-column:1;justify-self:start}
 .vocab-book-footer>.vocab-button:last-child{grid-row:1;grid-column:2;justify-self:end}
 .vocab-book-jump{grid-column:1/-1;grid-row:2;width:100%}
}
@media(prefers-reduced-motion:reduce){.yz-home .vocab-flash-front,.vocab-card #vocab-answer:not([hidden]){animation:none}}

/* One-line book title and a compact immersive reading mode. */
.vocab-book-top>strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:clamp(13px,3.6vw,18px)}
.vocab-book .vocab-book-close{min-width:40px;min-height:40px;padding:4px 8px;font-size:24px;line-height:1}
.vocab-book-status{white-space:nowrap;font-variant-numeric:tabular-nums}
.vocab-book-tools{grid-template-columns:auto minmax(0,1fr) auto auto}
.vocab-book-full-controls[hidden]{display:none!important}
.vocab-book.is-fullscreen{inset:0;margin:0;width:100vw;height:100dvh;max-width:100vw;max-height:100dvh;border:0;border-radius:0;grid-template-rows:minmax(0,1fr) auto}
.vocab-book.is-fullscreen>.vocab-book-header,.vocab-book.is-fullscreen>.vocab-book-footer{display:none}
.vocab-book.is-fullscreen>.vocab-book-body{padding:0;padding-top:env(safe-area-inset-top)}
.vocab-book-full-controls{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:8px;padding:4px max(8px,env(safe-area-inset-right)) max(4px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:var(--paper);border-top:1px solid var(--line-2)}
.vocab-book-full-status{text-align:center;font-size:12px;font-variant-numeric:tabular-nums}
.vocab-book .vocab-book-full-controls .vocab-button{min-height:40px;padding:6px 12px;font-size:13px}
@media(max-width:600px){.vocab-book-tools{gap:4px}.vocab-book-tools .vocab-button{padding:7px 8px;font-size:12px}.vocab-book-top{gap:6px}}

/* Reader next links retain the existing button layout before ads are configured. */
a.vocab-button{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;cursor:pointer}
a.vocab-button[aria-disabled="true"]{opacity:.45;pointer-events:none}

/* Show only the cover artwork; retain the original document asset unchanged. */
.yz-home .textbook-card .textbook-cover-button{position:relative;display:block;flex:0 0 auto;width:220px;max-width:70vw;aspect-ratio:1050 / 1495;padding:0;min-height:0;overflow:hidden;border:0;border-radius:6px;background:transparent;box-shadow:0 4px 16px #0002}
.yz-home .textbook-cover-button .textbook-cover-image{position:absolute;display:block;width:124.86%;max-width:none;height:auto;left:-12.38%;top:-10.03%;margin:0}