@font-face{font-family:Fraunces;src:url('/fonts/fraunces-latin-600.woff2') format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:Study;src:url('/work/assets/pretendard.woff2') format('woff2');font-weight:100 900;font-display:swap}
:root{--paper:#fff;--ink:#202521;--field:#f1f1ed;--muted:#53605e;--accent:#c9302c;--blue:#172c40;--gutter:clamp(20px,4.2vw,72px);font-family:Study,system-ui,sans-serif;font-size:17px;line-height:1.7;color:var(--ink);background:var(--paper);font-synthesis:none;color-scheme:light}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:.25em}button,input,select,summary{font:inherit}button,summary,a{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}::selection{background:var(--blue);color:white}[hidden]{display:none!important}.skip{position:fixed;top:-100px;left:20px;background:var(--ink);color:var(--paper);padding:12px;z-index:20}.skip:focus{top:10px}
.bookbar{display:flex;align-items:center;justify-content:space-between;padding:20px var(--gutter);gap:24px;background:var(--paper)}.brand{font-family:Fraunces,Georgia,serif;font-size:28px;text-decoration:none;white-space:nowrap}.bookbar nav{display:flex;align-items:center;gap:24px}.bookbar nav>a,.language summary{min-height:44px;display:flex;align-items:center}.language{position:relative}.language summary{cursor:pointer;list-style:none}.language summary:after{content:"";width:7px;height:7px;border-inline-end:1px solid currentColor;border-block-end:1px solid currentColor;transform:rotate(45deg);margin-inline-start:12px;margin-block-end:4px}.language>div{/* taste-skill-ignore: this shadow belongs to the floating language menu. */position:absolute;z-index:8;top:49px;right:0;min-width:155px;background:var(--paper);box-shadow:0 7px 25px #20252130;padding:8px}.language a{display:block;padding:10px 14px}.language a[aria-current]{font-weight:700}
main{max-width:1240px;margin:auto;padding:44px var(--gutter) 90px}h1,h2,h3{line-height:1.3;letter-spacing:-.025em;text-wrap:balance;word-break:keep-all}h1{font-size:clamp(34px,4.5vw,56px);margin:0 0 25px;max-width:18ch}h2{font-size:28px;margin:0 0 24px}h3{font-size:22px;margin:0 0 14px}p{word-break:keep-all;overflow-wrap:anywhere;margin:0 0 18px}section{margin-top:68px}.intro{display:grid;grid-template-columns:1.15fr 1fr;gap:55px;align-items:center;margin-top:0;margin-bottom:50px}.intro p{max-width:38ch}.spread{background:var(--field);padding:26px;display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}.spread figure{margin:0;background:white;padding:12px;min-width:0}.spread img{display:block;width:100%;height:160px;object-fit:contain;object-position:center top}.spread figcaption{font-size:12px;line-height:1.5;margin-top:12px;color:var(--muted)}.primary{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 21px;background:var(--ink);color:var(--paper);text-decoration:none;border:0}.primary:hover{background:var(--blue)}.primary:active,button:active{transform:scale(.98)}.secondary{display:inline-flex;min-height:44px;align-items:center;padding:8px 0}.count{color:var(--muted);font-variant-numeric:tabular-nums}.filters{display:flex;gap:20px;flex-wrap:wrap;align-items:end;background:var(--field);padding:22px;margin-bottom:28px}.filters label{display:flex;flex-direction:column;gap:7px;min-width:145px}.filters label:last-of-type{flex:1}.filters select,.filters input,.reader-nav select{padding:10px 12px;min-height:46px;border:1px solid #53605e;background:white;border-radius:0;color:var(--ink);max-width:100%;min-width:0}.filters p{width:100%;margin:0}.exam-row{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:center;gap:28px;padding:26px 20px}.exam-row:nth-child(even){background:var(--field)}.exam-row h3{font-size:20px;line-height:1.5;margin-bottom:6px}.exam-row p{font-size:15px;color:var(--muted);margin:0}.actions{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center}.actions a{min-height:44px;display:inline-flex;align-items:center}.collections{display:grid;grid-template-columns:1fr;gap:32px}.collection{background:var(--field);padding:28px}.collection h3{font-size:25px}.edition{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:25px;padding:18px 0}.edition p{font-size:15px;margin:6px 0 0}.edition strong{font-size:19px}.note{max-width:75ch;background:var(--field);padding:26px}.note p:last-child{margin:0}.note h2{font-size:23px}.foot{background:var(--blue);color:white;padding:42px var(--gutter);display:flex;align-items:center;justify-content:space-between;gap:25px;flex-wrap:wrap}.foot p{margin:0;font-size:15px}.foot a{min-height:44px;display:inline-flex;align-items:center}
.reader-main{max-width:1100px;padding-top:30px}.reader-head h1{font-size:32px;max-width:28ch}.reader-head p{max-width:70ch}.reader-nav{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;position:sticky;top:0;background:var(--paper);z-index:4;padding:15px 0}.reader-nav button{min-height:46px;min-width:72px;border:0;background:var(--ink);color:var(--paper);padding:10px 15px}.reader-nav button:disabled{background:var(--field);color:var(--muted);cursor:default}.reader-status{font-size:15px;font-variant-numeric:tabular-nums;margin:8px 0 22px}.problem-page{margin:0;background:var(--field);padding:30px}.source-line{font-size:15px;margin:0 0 22px}.question-image{display:block;background:white;max-width:100%;width:auto;max-height:none;margin:0 auto}.problem-page figcaption{margin-top:20px;font-size:14px;color:var(--muted)}.explanation{margin-top:32px;max-width:76ch}.explanation summary,.answer-key summary{min-height:48px;cursor:pointer;font-size:20px;font-weight:700;padding:8px 0}.solution-text{white-space:pre-wrap;font-size:17px;line-height:1.95;overflow-wrap:anywhere}.tip{background:var(--field);padding:20px;margin:20px 0}.answer-key{margin:40px 0}.key-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 24px;font-size:15px}.key-list p{margin:0}.download-bar{display:flex;align-items:center;flex-wrap:wrap;gap:12px 24px;margin:25px 0 38px}.error{background:var(--field);padding:22px}.error a{display:inline-flex;min-height:44px;align-items:center}.reader-concept{background:var(--field);padding:25px;max-width:76ch;margin:25px 0}.reader-concept h2{font-size:23px}.reader-concept p{font-size:16px;line-height:1.85}.catalogue-links{display:flex;flex-wrap:wrap;gap:8px 22px}.catalogue-links a{min-height:44px;display:inline-flex;align-items:center}
@media(hover:hover) and (pointer:fine){a:hover{color:var(--accent)}.primary:hover{color:white}button{transition:transform 120ms cubic-bezier(.23,1,.32,1)}}
@media(max-width:780px){.bookbar{gap:12px;align-items:flex-start}.bookbar nav{gap:15px;flex-wrap:wrap;justify-content:flex-end}.brand{font-size:24px}.intro{grid-template-columns:1fr;gap:25px}.intro p{max-width:65ch}.spread{padding:20px}.spread img{height:135px}.exam-row,.edition{grid-template-columns:1fr;gap:10px}.exam-row{padding:22px 15px}.filters{gap:15px;padding:18px}.filters label{flex:1;min-width:130px}.filters label:last-of-type{flex-basis:100%}.collection{padding:22px}.reader-head h1{font-size:28px}.problem-page{padding:18px}.reader-nav{gap:8px}.reader-nav button{min-width:58px;padding:10px}.key-list{grid-template-columns:repeat(2,minmax(0,1fr))}.foot{align-items:flex-start}}
@media(max-width:450px){:root{font-size:16px}.bookbar{padding-top:15px;padding-bottom:12px}.bookbar nav{gap:4px 15px;font-size:14px}.bookbar nav>a:first-child{display:none}.brand{font-size:22px;line-height:44px}.intro{margin-bottom:35px}.intro h1{font-size:36px}.spread{gap:10px;padding:12px}.spread figure{padding:9px}.spread figcaption{font-size:11px}main{padding-top:26px}section{margin-top:45px}h2{font-size:25px}.reader-main{padding-top:20px}.reader-head h1{font-size:25px}.reader-nav{grid-template-columns:1fr 1fr}.reader-nav select{grid-column:1/-1;grid-row:1}.reader-nav button{width:100%}.reader-status{font-size:14px}.download-bar{gap:10px 20px}.problem-page{padding:14px}.source-line{font-size:14px}.key-list{grid-template-columns:1fr 1fr;gap:8px 16px}.note{padding:20px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{.bookbar,.reader-nav,.download-bar,.foot,.filters{display:none}main{max-width:none;padding:0}.problem-page{background:white;padding:0}.explanation{break-before:page}}

/* The existing Aldus type and palette continue across the expanded catalogue. */
:root{--line:#dfe2dc;--focus:var(--accent)}
html{scroll-padding-top:24px;scrollbar-color:var(--muted) var(--field)}
body{min-width:0}input{caret-color:var(--accent)}
button{min-height:44px;padding:9px 15px;border:1px solid var(--muted);border-radius:0;background:var(--paper);color:var(--ink)}
button:disabled{color:var(--muted);cursor:default}summary{cursor:pointer}
section[id]{scroll-margin-top:24px}.section-help{max-width:75ch}
.catalogue-links{gap:8px 24px;margin:20px 0 12px}.catalogue-links a{font-weight:600}
.download-status{max-width:75ch;margin:12px 0;min-height:0}.download-status:empty{display:none}
.download-status:not(:empty){padding:15px 20px;background:var(--field)}
.download-status a{display:inline-flex;align-items:center;min-height:44px;margin-inline-start:10px}
a[aria-busy=true]{opacity:.65;cursor:progress}
.collection-list{display:block}.collection-group{margin:0;background:var(--field)}
.collection-group+.collection-group{margin-top:12px}
.collection-group>summary{min-height:70px;padding:19px 24px;line-height:1.5;font-size:20px;font-weight:600;list-style-position:inside}
.collection-group>summary span{vertical-align:middle}.group-count{font-size:15px;font-weight:400;color:var(--muted);margin-inline-start:18px;white-space:nowrap}
.collection-group[open]>summary{padding-bottom:12px}
.editions{padding:0 24px 14px}.edition{grid-template-columns:minmax(0,1.2fr) minmax(0,1.5fr);gap:18px;padding:20px 0}
.edition h4{font-size:18px;line-height:1.5;letter-spacing:0;margin:0;word-break:keep-all}
.edition p{font-size:15px;color:var(--muted);line-height:1.7;margin:6px 0 0}
.edition+.edition{border-block-start:1px solid var(--line)}
.actions{gap:4px 18px}.actions>a{font-size:15px;max-width:100%}.actions noscript a{display:inline-flex;min-height:44px;align-items:center;font-size:15px}
.exam-row>div,.edition>div{min-width:0}.exam-row h3{max-width:55ch}.exam-row p{max-width:65ch}
.empty-state{padding:25px;background:var(--field)}.empty-state p{margin:0}
.reader-head h1{max-width:36ch}.back-link{display:inline-flex;align-items:center;min-height:44px;margin-bottom:15px;font-size:15px}
.reader-head .editorial-note{font-size:15px;color:var(--muted);max-width:75ch}
.reader-concept{margin:22px 0 32px;max-width:76ch}.reader-concept h2{font-size:23px;margin-bottom:20px}.reader-concept h3{font-size:19px;margin:28px 0 12px}
.reader-concept p:last-child{margin-bottom:0}.question-image{height:auto}
.solution-text,.reader-concept p,.tip{overflow-wrap:anywhere;white-space:pre-wrap}
sup,sub{font-size:.75em;line-height:0;position:relative;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.2em}
#answer{font-size:22px;font-variant-numeric:tabular-nums}.download-bar{margin-bottom:18px}
@media(max-width:780px){.edition{grid-template-columns:1fr;gap:8px}.collection-group>summary{padding:18px 20px}.editions{padding:0 20px 10px}.reader-head h1{max-width:100%}}
@media(max-width:450px){.collection-group>summary{font-size:18px;padding:16px}.group-count{display:block;margin-inline-start:22px;margin-top:3px;font-size:14px}.editions{padding:0 16px 10px}.edition{padding:18px 0}.edition h4{font-size:17px}.actions{column-gap:16px}.actions>a{font-size:14px}.catalogue-links{gap:6px 22px}.filters button{flex:1}.reader-concept{padding:20px}.reader-concept h2{font-size:21px}}
@media print{.back-link,.catalogue-links,.download-status,#reader-error{display:none}}

main[data-shelf] .download-status:not(:empty){position:sticky;top:12px;z-index:8}