:root{--library-max:1240px}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-ui);min-width:320px}
button,select,input,textarea{font:inherit}
button{color:inherit}
.library-shell{min-height:100vh}
.library-masthead{width:min(var(--library-max),calc(100% - 64px));min-height:86px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:1px solid var(--line)}
.library-brand{font:500 17px/1.4 var(--font-display);letter-spacing:.04em;text-decoration:none;color:var(--ink);white-space:nowrap}
.library-shelf,.library-reader,.library-studio{width:min(var(--library-max),calc(100% - 64px));margin:0 auto}
.library-hero{display:flex;justify-content:space-between;align-items:flex-end;gap:36px;padding:78px 0 54px}
.library-kicker,.reader-origin,.reader-category,.reader-progress{margin:0 0 12px;color:var(--muted);font-size:12px;letter-spacing:.14em}
.library-hero h1,.studio-head h1{margin:0;font:400 clamp(46px,6vw,76px)/1 var(--font-display);letter-spacing:.05em}
.library-hero>div>p:last-child{max-width:500px;margin:20px 0 0;color:var(--muted);font:400 15px/1.9 var(--font-ui)}
.library-contribute,.library-submit{display:inline-flex;align-items:center;justify-content:center;gap:14px;min-height:48px;padding:0 22px;border:1px solid var(--line-strong);border-radius:3px;background:transparent;color:var(--ink);cursor:pointer;transition:.2s ease}
.library-contribute:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.library-categories{display:flex;gap:10px;flex-wrap:wrap;padding:0 0 24px;border-bottom:1px solid var(--line)}
.library-categories button{min-height:38px;padding:0 16px;border:1px solid transparent;border-radius:99px;background:transparent;color:var(--muted);cursor:pointer}
.library-categories button[aria-current=true]{border-color:var(--line-strong);background:var(--surface);color:var(--ink)}
.library-message{min-height:24px;color:var(--muted);font-size:13px}
.library-groups{padding:22px 0 82px}
.library-group{padding:28px 0 42px}
.library-group-head{display:flex;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--line);margin-bottom:26px;padding-bottom:13px}
.library-group-head h2{margin:0;font:400 23px/1.4 var(--font-display)}
.library-group-head span{color:var(--muted);font-size:12px}
.library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.library-card{position:relative;min-height:380px;border:1px solid var(--line);border-radius:7px;background:var(--surface);overflow:hidden;cursor:pointer;display:flex;flex-direction:column;text-align:left;padding:0;box-shadow:0 14px 38px transparent;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.library-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 18px 42px var(--shadow)}
.library-cover{height:235px;overflow:hidden;background:var(--wash);border-bottom:1px solid var(--line)}
.library-cover img{display:block;width:100%;height:100%;object-fit:cover;object-position:center;transition:transform .45s cubic-bezier(.2,.65,.3,1)}
.library-card:hover .library-cover img{transform:scale(1.025)}
.library-card-copy{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:start;padding:22px 22px 20px;flex:1}
.library-card-copy small{display:block;color:var(--muted);font-size:11px;letter-spacing:.12em;margin-bottom:9px}
.library-card-copy h3{margin:0;font:400 23px/1.45 var(--font-display)}
.library-card-copy>span{align-self:end;font-size:22px;color:var(--accent);transition:transform .2s ease}
.library-card:hover .library-card-copy>span{transform:translateX(4px)}
.reader-head{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:86px;border-bottom:1px solid var(--line)}
.reader-back{display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:0;border:0;background:transparent;color:var(--muted);cursor:pointer}
.reader-back:hover{color:var(--ink)}
.reader-origin{margin:0;letter-spacing:.04em}
.reader-layout{display:grid;grid-template-columns:300px minmax(0,760px);gap:72px;justify-content:center;padding:62px 0 92px}
.reader-sidebar{position:sticky;top:30px;align-self:start;padding-right:14px}
.reader-sidebar h1{margin:0 0 30px;font:400 34px/1.45 var(--font-display)}
.reader-sidebar nav{display:grid;border-top:1px solid var(--line)}
.reader-sidebar nav button{position:relative;padding:14px 10px 14px 25px;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--muted);text-align:left;line-height:1.55;cursor:pointer}
.reader-sidebar nav button::before{content:attr(data-number);position:absolute;left:0;color:var(--accent);font-size:10px;top:17px}
.reader-sidebar nav button[aria-current=step]{color:var(--ink);background:linear-gradient(90deg,var(--wash),transparent)}
.reader-paper{min-height:720px;padding:54px 60px 42px;border:1px solid var(--line);background:var(--surface);box-shadow:0 22px 64px var(--shadow)}
.reader-paper>h2{margin:0 0 35px;font:400 clamp(29px,3vw,42px)/1.45 var(--font-display)}
.reader-prose{font-family:var(--reading,var(--font-display));font-size:17px;line-height:2.08}
.reader-prose h3{font:500 23px/1.55 var(--font-display);margin:40px 0 14px}
.reader-prose h4{font:600 17px/1.65 var(--font-ui);margin:30px 0 10px}
.reader-prose p{margin:0 0 22px}
.reader-prose ul,.reader-prose ol{margin:0 0 24px;padding-left:1.45em}
.reader-prose li{margin:7px 0}
.reader-prose blockquote{margin:28px 0;padding:4px 0 4px 22px;border-left:2px solid var(--accent);color:var(--muted)}
.reader-supplements details{border-top:1px solid var(--line);padding:0}
.reader-supplements summary{cursor:pointer;padding:18px 0;color:var(--ink)}
.reader-supplements div{padding-bottom:14px;color:var(--muted);line-height:1.9}
.reader-actions{display:flex;justify-content:space-between;gap:20px;margin-top:52px;padding-top:22px;border-top:1px solid var(--line)}
.reader-actions button{min-height:44px;border:0;background:transparent;color:var(--accent);cursor:pointer}
.reader-actions button:disabled{visibility:hidden}
.studio-head{display:flex;align-items:center;gap:50px;padding:54px 0 36px;border-bottom:1px solid var(--line)}
.studio-form{display:grid;gap:20px;max-width:720px;padding:38px 0}
.studio-form label,.studio-form fieldset{display:grid;gap:8px;border:0;padding:0;margin:0}
.studio-form :is(select,input:not([type=checkbox]),textarea){width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:5px;background:var(--surface);color:var(--ink)}
.studio-form label:has(input[type=checkbox]){display:flex;align-items:flex-start;gap:10px}
.library-submit{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);justify-self:start}
.library-drafts{display:grid;gap:16px;padding-bottom:70px}
.library-drafts>section{border:1px solid var(--line);padding:24px;background:var(--surface)}
.library-footer{display:flex;justify-content:center;gap:28px;flex-wrap:wrap;border-top:1px solid var(--line);padding:28px;color:var(--muted);font-size:11px}
.library-footer a{color:inherit}
.library-browse-bar{display:flex;align-items:start;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}
.library-browse-bar .library-categories{border:0;flex:1}
.library-sort-label{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;white-space:nowrap}
.library-sort-label select{width:auto;min-height:38px;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:6px 28px 6px 12px;border-radius:4px}
.library-entry{min-width:0;display:flex;flex-direction:column}
.library-entry .library-card{width:100%;flex:1}
.library-card-social,.reader-social{display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--muted);font-size:13px;padding:12px 4px}
.library-card-social>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.library-like{display:inline-flex;align-items:center;justify-content:center;min-width:56px;min-height:44px;padding:6px 12px;background:transparent;border:1px solid var(--line);border-radius:24px;font:inherit;color:var(--muted);cursor:pointer;white-space:nowrap}
.library-like[aria-pressed=true]{color:var(--accent);border-color:var(--accent);background:var(--surface)}
.library-like:hover{border-color:var(--accent);color:var(--accent)}
.library-like[hidden]{display:none}
.reader-social{padding:16px 0 0}.reader-social+[role=status]:empty{display:none}
.library-studio .studio-head{display:block;padding:36px 0 42px}
.studio-head .reader-back{margin-bottom:28px}
.library-studio .studio-head h1{font-size:clamp(40px,5vw,62px);line-height:1.15}
.studio-composer{display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,1.7fr);gap:clamp(32px,6vw,100px);padding:32px 0 52px;border-bottom:1px solid var(--line)}
.studio-number{display:block;color:var(--accent);font-size:12px;letter-spacing:.15em;margin-bottom:24px}
.studio-note h2{font:400 28px/1.65 var(--font-display);margin:0 0 18px}
.studio-note p{max-width:260px;color:var(--muted);font-size:14px;line-height:1.9;margin:0}
.library-studio .studio-form{display:grid;align-content:start;gap:14px;padding:30px;border:1px solid var(--line);background:var(--surface);max-width:none;border-radius:6px}
.studio-form>label:not(.studio-toggle){font-size:14px;color:var(--muted)}
.studio-form>select{min-height:52px;border:1px solid var(--line-strong);border-radius:4px;background:var(--bg);color:var(--ink);padding:12px;width:100%}
.studio-course-summary{margin:0 0 12px;color:var(--muted);font-size:13px;line-height:1.8}
.studio-form .studio-toggle{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 0;margin:0;border-top:1px solid var(--line);font-size:15px}
.studio-toggle input[type=checkbox]{appearance:none;display:block;position:relative;flex:0 0 42px;width:42px;height:24px;min-height:0;margin:0;padding:0;border:1px solid var(--line-strong);border-radius:30px;background:var(--bg);cursor:pointer}
.studio-toggle input::after{content:'';position:absolute;left:3px;top:3px;width:16px;height:16px;border-radius:50%;background:var(--muted);transition:transform .15s}
.studio-toggle input:checked{background:var(--accent);border-color:var(--accent)}
.studio-toggle input:checked::after{background:var(--accent-ink);transform:translateX(18px)}
.library-studio .library-submit{color:var(--accent-ink);font-size:15px;min-height:48px;min-width:148px}
.library-studio button:disabled{cursor:wait;opacity:.65}
.studio-drafts-head{display:flex;align-items:baseline;justify-content:space-between;padding:34px 0 20px}
.studio-drafts-head h2{font:400 27px/1.4 var(--font-display);margin:0}
.studio-drafts-head span{font-size:13px;color:var(--muted)}
.library-drafts>section{display:flex;flex-wrap:wrap;align-items:center;gap:14px 18px;border-radius:6px;padding:26px}
.library-drafts h3{width:100%;font:400 23px/1.5 var(--font-display);margin:0}
.library-drafts p{font-size:13px;color:var(--muted);margin:0}
.library-drafts button:not(.library-submit){min-height:44px;padding:8px 14px;background:transparent;border:1px solid var(--line);border-radius:4px;color:var(--ink);cursor:pointer;font-size:14px}
.library-drafts textarea{width:100%;min-height:76px;resize:vertical;padding:12px;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:4px;font-size:14px}
.library-drafts .studio-confirm{display:flex;align-items:center;justify-content:flex-start;gap:10px;width:100%;margin:6px 0;font-size:14px;line-height:1.7;color:var(--muted)}
.studio-confirm input[type=checkbox]{appearance:auto;flex:0 0 18px;width:18px;height:18px;min-height:0;margin:0;padding:0;accent-color:var(--accent)}
.studio-privacy{width:100%;font-size:14px;color:var(--muted)}.studio-privacy summary{padding:12px 0;cursor:pointer}.studio-privacy textarea{margin-bottom:12px}
.library-shell :is(button,select,input,textarea):focus-visible{outline:2px solid var(--accent);outline-offset:4px}
@media(max-width:680px){.library-browse-bar{flex-direction:column;gap:0;padding-bottom:20px}.studio-composer{grid-template-columns:1fr;gap:24px;padding:20px 0 32px}.studio-note h2{font-size:24px}.studio-note h2 br{display:none}.studio-note p{max-width:none}.studio-number{margin-bottom:12px}.library-studio .studio-form{padding:22px}.library-drafts>section{padding:20px}.library-studio .studio-head{padding:24px 0 30px}}
@media(max-width:900px){.library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reader-layout{grid-template-columns:230px minmax(0,1fr);gap:32px}.reader-paper{padding:42px 36px}.library-masthead{width:calc(100% - 40px)}}
@media(max-width:680px){.library-masthead,.library-shelf,.library-reader,.library-studio{width:calc(100% - 32px)}.library-masthead{min-height:72px}.library-hero{align-items:flex-start;flex-direction:column;padding:48px 0 34px}.library-hero h1,.studio-head h1{font-size:48px}.library-grid{grid-template-columns:1fr}.library-card{min-height:340px}.library-cover{height:215px}.reader-head{min-height:72px}.reader-origin{display:none}.reader-layout{display:block;padding:28px 0 60px}.reader-sidebar{position:static;max-height:none;overflow:visible;padding:0}.reader-sidebar h1{font-size:30px;margin-bottom:18px}.reader-sidebar nav{display:flex;overflow:auto;border-bottom:1px solid var(--line);margin-bottom:24px}.reader-sidebar nav button{flex:0 0 auto;max-width:210px;border-bottom:0;padding:12px 14px 12px 25px}.reader-paper{min-height:0;padding:32px 22px}.reader-paper>h2{font-size:29px}.reader-prose{font-size:16px}.studio-head{align-items:flex-start;flex-direction:column;gap:20px;padding:34px 0}.library-footer{gap:18px}}
@media(prefers-reduced-motion:reduce){.library-card,.library-card-copy>span,.library-cover img,.faq-more a span{transition:none!important}}