.book-hero__note{color:var(--muted-2);font-size:10px}
.book-hero__chapters{display:flex;gap:5px;flex-wrap:wrap;margin-top:14px}
.book-hero__chapter{display:inline-flex;padding:4px 8px;border-radius:99px;color:#fff;font-size:9px;font-weight:600}
.book-search{min-width:210px}
.book-count{color:var(--muted);font-size:10px}
.entry-field--block{grid-column:1/-1}
.entry-field--block strong{display:block;margin-top:2px}
.latex{white-space:nowrap}
/* field table: labels live in one header row */
.entry-table{--rest-fields:3;border-top:1px solid var(--line)}
.entry-table-head,.entry-row{display:grid;grid-template-columns:minmax(170px,1.25fr) repeat(var(--rest-fields),minmax(125px,1fr));gap:0 20px;align-items:start}
.entry-table-head{padding:11px 0 10px;border-bottom:1px solid var(--line);color:#5f584d;font-size:11px;font-weight:600;letter-spacing:.01em}
.entry-head-cell{min-width:0;line-height:1.35}
.entry-head-cell small{display:block;margin-top:2px;color:#8a8175;font-size:8px;font-weight:400;letter-spacing:.06em;text-transform:uppercase}
.entry-head-cell--word{padding-left:0}
.entry-row{padding:14px 0;border-bottom:1px solid var(--line-soft)}
.entry-cell{min-width:0;padding-top:2px;color:var(--ink);font-size:14px;line-height:1.7;word-break:break-word}
.entry-cell--word{padding-top:0}
.entry-cell--word .entry-word{align-items:flex-start}
.entry-cell--word h3{font-size:27px;line-height:1.3;font-family:var(--display),'PingFang SC','Noto Sans SC',sans-serif;font-weight:600}
.entry-cell .katex{font-size:1.08em}
.entry-cell--word .katex{font-size:1em}
@media(max-width:820px){
  .entry-table-head{display:none}
  .entry-table{border-top:0}
  .entry-row{display:block;padding:17px 0}
  .entry-cell{display:grid;grid-template-columns:96px minmax(0,1fr);gap:10px;padding:3px 0;border:0}
  .entry-cell:before{content:attr(data-label);color:var(--muted);font-size:9.5px;line-height:1.7}
  .entry-cell--word{display:block;padding-bottom:7px}
  .entry-cell--word:before{display:none}
  .entry-cell--word h3{display:inline;margin-right:7px;font-size:23px}
  .entry-cell--word .entry-chapter{vertical-align:2px}
}

.book-hero h1{font-family:var(--display),'PingFang SC','Noto Sans SC',sans-serif;font-weight:600;letter-spacing:-.035em}
.book-hero p{color:#5f584d;font-size:14px;line-height:1.8}
.entry-table-head{color:#665f54}
.entry-cell{font-size:13.5px}
/* flashcards */
.flash-overlay{position:fixed;inset:0;z-index:70;display:grid;place-items:center;padding:18px;background:rgba(30,27,22,.55);backdrop-filter:blur(8px)}
.flash-shell{width:min(100%,520px);max-height:calc(100dvh - 28px);display:flex;flex-direction:column;gap:12px}
.flash-head{display:flex;align-items:flex-start;justify-content:space-between;color:#f6f1e7}.flash-head strong{display:block;margin-top:2px;font:500 13px var(--display)}.flash-kicker{display:block;color:rgba(246,241,231,.55);font-size:8px;letter-spacing:.16em}
.flash-close{width:32px;height:32px;border:1px solid rgba(255,255,255,.25);border-radius:50%;background:transparent;color:#fff;font-size:20px;line-height:1}
.flash-stage{perspective:1400px;width:100%}
.flash-card{position:relative;display:block;width:100%;aspect-ratio:3/4;max-height:62vh;margin:0 auto;padding:0;border:0;background:transparent;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.7,.2,1);cursor:pointer}
.flash-card.is-flipped{transform:rotateY(180deg)}
.flash-face{position:absolute;inset:0;display:block;padding:24px;border-radius:18px;background:#fffdf8;border:1px solid #d8cebd;box-shadow:0 24px 60px rgba(20,18,15,.24);backface-visibility:hidden;overflow:hidden;text-align:left}
.flash-face--back{transform:rotateY(180deg);background:#f7f2e7}
.flash-field{position:absolute;display:block}
.flash-field small{display:block;margin-bottom:3px;color:#93897a;font-size:8.5px;letter-spacing:.04em;text-transform:uppercase}.flash-field strong{display:block;color:var(--ink);font:500 22px/1.35 var(--display);overflow-wrap:anywhere}.flash-field strong .katex{font-size:1em}
.flash-chapter{position:absolute;display:inline-flex;align-items:center;padding:5px 9px;border-radius:99px;color:#fff;font-size:9px;font-weight:600;white-space:nowrap}
.flash-empty-card{position:absolute;inset:0;display:grid;place-items:center;color:#a59a89;font-size:11px}
.flash-controls{display:flex;align-items:center;justify-content:center;gap:7px}
.flash-nav,.flash-shuffle,.flash-flip{min-height:36px;border:1px solid rgba(255,255,255,.22);border-radius:99px;background:rgba(255,255,255,.08);color:#f6f1e7;padding:7px 13px;font-size:10px}
.flash-flip{background:#f6f1e7;color:var(--ink);border-color:#f6f1e7;padding:8px 20px}
.flash-shuffle{font-size:9px;opacity:.8}.flash-nav{width:36px;padding:0;font-size:14px}
.flash-hint{margin:0;text-align:center;color:rgba(246,241,231,.55);font-size:9px}
@media(max-width:560px){.flash-face{padding:18px}.flash-controls{gap:5px}.flash-shuffle{display:none}.flash-card{max-height:58vh}}
.book-tools__right{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.flash-open{min-height:34px;padding:6px 11px;border:1px solid var(--line);border-radius:99px;background:var(--surface);color:var(--ink);font-size:10px;font-weight:600}
.flash-open:hover{background:var(--ink);border-color:var(--ink);color:#fff}
@media(max-width:620px){.book-tools__right{width:100%;justify-content:space-between}.book-search{flex:1}}
.flash-field strong{font-size:calc(22px * var(--item-size,1));font-family:'Noto Sans Thai','IBM Plex Sans Thai',-apple-system,'Helvetica Neue',sans-serif;font-weight:600;letter-spacing:0}
.flash-field small{font-family:'IBM Plex Sans Thai',sans-serif}
.flash-field .katex{font-family:KaTeX_Main,'IBM Plex Sans Thai',sans-serif}
@media(max-width:560px){.flash-field strong{font-size:calc(18px * var(--item-size,1))}}
.flash-field.is-pinyin strong{font-family:'Noto Sans',Arial,'Helvetica Neue',sans-serif;font-weight:500;letter-spacing:0;font-feature-settings:"kern" 1}
.flash-field.is-pinyin small{font-family:'Noto Sans',Arial,sans-serif;text-transform:none;letter-spacing:.02em}
.load-more{display:flex;width:100%;justify-content:center;margin:16px 0 0;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:10px;font-weight:600}
.load-more:hover{background:var(--ink);border-color:var(--ink);color:#fff}

.ui-icon{display:inline-block;width:14px;height:14px;vertical-align:-2px;flex:0 0 auto}
.book-card__arrow .ui-icon{width:17px;height:17px}