@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Serif:wght@400;500&display=swap');
:root{--forest:#173e31;--ink:#202c26;--muted:#626c65;--line:#d8ddd6;--paper:#fbfcf9;--wash:#f0f3ec;--mono:'IBM Plex Mono',monospace;--sans:'IBM Plex Sans',sans-serif;--serif:'IBM Plex Serif',Georgia,serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid #287654;outline-offset:5px}::selection{background:#d9e7b5;color:var(--forest)}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:20px;top:-80px;z-index:2000;background:var(--forest);color:white;padding:12px 18px}.skip-link:focus{top:12px}
.masthead{background:var(--forest);color:#fff;display:flex;align-items:center;gap:60px;padding:32px max(5vw,24px);border-bottom:5px solid #bfd19b}.wordmark{font-weight:600;font-size:28px;line-height:1.02;letter-spacing:-1.1px;display:block}.wordmark>span{display:block}.brand-period{color:#bfd19b}.masthead-note{font-size:12px;color:#c9d7ce;line-height:1.55;padding-left:32px;border-left:1px solid #486457}.masthead nav{display:flex;gap:32px;margin-left:auto;font-size:14px}.masthead nav a{padding:10px 0;border-bottom:1px solid transparent}.masthead nav a:hover{border-color:#bfd19b}.masthead nav span{margin-left:20px;color:#bfd19b}
main,.library-footer{max-width:1440px;margin:0 auto;padding:0 max(5vw,24px)}.intro{padding:36px 0 48px}.intro-label{display:flex;justify-content:space-between;align-items:center}.overline,.index-stamp{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase}.overline{color:var(--forest)}.index-stamp{color:var(--muted)}.intro-grid{display:grid;grid-template-columns:1.65fr 1fr;gap:9%;align-items:end;margin-top:36px}h1{font-size:clamp(42px,5.35vw,76px);line-height:1.03;letter-spacing:-.055em;font-weight:500;margin:0;color:var(--forest)}.title-period{color:#73905b}.intro-aside{padding-bottom:3px}.intro-aside p{font-size:15px;line-height:1.65;color:var(--muted);margin:0 0 18px;max-width:370px}.intro-aside p:first-child{font-family:var(--serif);font-size:20px;color:var(--ink);line-height:1.4;margin-bottom:10px}.text-link{display:inline-flex;align-items:center;gap:30px;font-size:13px;font-weight:500;border-bottom:1px solid #9eafa1;padding-bottom:6px}.text-link:hover{color:#287654;border-color:#287654}
.library{border-top:2px solid var(--forest);padding-top:25px}.library-title{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:25px}.library-title h2{font-size:21px;font-weight:500;letter-spacing:-.02em;margin:0}.library-title>span{font-family:var(--mono);color:var(--muted);font-size:11px}.library-tools{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.filters{display:flex;gap:6px;flex-wrap:wrap}.filters button{border:1px solid transparent;background:transparent;color:var(--muted);padding:9px 12px;font-size:12px;border-radius:0}.filters button[aria-pressed=true]{background:var(--forest);color:white}.filters button:hover:not([aria-pressed=true]){border-color:var(--line);color:var(--forest)}.search-field{display:flex;align-items:center;gap:10px;border-bottom:1px solid #9eafa1;width:300px;padding:8px 0}.search-field:focus-within{border-color:var(--forest)}.search-field svg{width:17px;height:17px;fill:none;stroke:var(--muted);stroke-width:1.5;flex-shrink:0}.search-field input{min-width:0;width:100%;border:0;background:transparent;color:var(--ink);font-size:13px;padding:4px 0}.search-field input:focus{outline:0}.search-field kbd{border:1px solid var(--line);font-family:var(--mono);font-size:10px;padding:0 5px;color:var(--muted)}
.index-head,.reference{display:grid;grid-template-columns:55px 1.2fr 1fr 28px;column-gap:28px;align-items:center}.index-head{font-family:var(--mono);font-size:9px;letter-spacing:.09em;text-transform:uppercase;padding:12px 18px;background:var(--wash);color:var(--muted);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.reference{position:relative;padding:26px 18px;border-bottom:1px solid var(--line);transition:background .15s}.reference:hover{background:var(--wash)}.reference:focus-visible{z-index:1;outline-offset:-2px}.reference-number{font-family:var(--mono);font-size:13px;color:#7b867d;align-self:start;padding-top:4px}.topic{font-family:var(--mono);font-size:9px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);display:block;margin-bottom:7px}.reference h3{font-size:25px;font-weight:500;letter-spacing:-.035em;margin:0 0 9px;line-height:1.15;color:var(--forest)}.reference-meta{font-family:var(--mono);font-size:10px;color:var(--muted)}.reference-meta span{margin:0 8px;color:#a6ada5}.reference>p{font-size:14px;line-height:1.6;max-width:350px;color:var(--muted);margin:0}.reference-arrow{font-size:25px;color:var(--forest);justify-self:end;transition:transform .15s}.reference:hover .reference-arrow{transform:translate(2px,-2px)}.empty-state{text-align:center;padding:50px 24px;border-bottom:1px solid var(--line)}.empty-state h3{font-family:var(--serif);font-size:25px;font-weight:400;margin:0 0 12px}.empty-state p{color:var(--muted);font-size:14px}.empty-state button{color:var(--forest);background:transparent;border:0;border-bottom:1px solid var(--forest);font-size:13px;padding:8px 0}
.about{display:grid;grid-template-columns:1fr 2fr .7fr;gap:36px;padding:58px 0 64px;align-items:start}.about>.overline{padding-top:8px}.about h2{font-family:var(--serif);font-size:30px;font-weight:400;letter-spacing:-.035em;margin:0 0 16px}.about p{font-size:14px;line-height:1.75;max-width:470px;color:var(--muted);margin:0 0 12px}.about p.open-note{color:var(--forest);font-weight:500}.about-mark{font-family:var(--serif);font-size:78px;line-height:1;letter-spacing:-.09em;justify-self:end;color:#b2c0ad}.about-mark span{font-size:45px}.library-footer{border-top:1px solid var(--line);padding-top:22px;padding-bottom:25px;display:flex;gap:25px;align-items:center;font-size:11px;color:var(--muted)}.library-footer>span:first-child{color:var(--forest);font-weight:500;margin-right:auto}.footer-year{color:var(--muted);font-weight:400;margin-left:15px}.library-footer a:hover{text-decoration:underline}
@media(min-width:1500px){main,.library-footer{padding-left:72px;padding-right:72px}.masthead{padding-left:max(72px,calc((100vw - 1296px)/2));padding-right:max(72px,calc((100vw - 1296px)/2))}}
@media(max-width:900px){.masthead{gap:30px}.intro-grid{gap:40px;grid-template-columns:1.4fr 1fr}.intro-aside p:first-child{font-size:18px}h1{font-size:52px}.library-tools{align-items:stretch;flex-direction:column}.search-field{width:100%;max-width:none}.index-head,.reference{grid-template-columns:35px 1.15fr 1fr 20px;gap:18px}.reference h3{font-size:22px}.about{grid-template-columns:1fr 2fr}.about-mark{display:none}}
@media(max-width:620px){.masthead{padding:24px;gap:20px}.wordmark{font-size:24px}.masthead-note{display:none}.masthead nav{gap:22px;font-size:12px}.masthead nav span{display:none}.intro{padding-top:24px;padding-bottom:35px}.intro-grid{grid-template-columns:1fr;gap:25px;margin-top:30px}h1{font-size:clamp(38px,9.7vw,57px)}.intro-aside p{max-width:450px;font-size:14px}.intro-aside p:first-child{font-size:19px}.text-link{margin-top:2px}.index-stamp{font-size:9px}.library-title h2{font-size:20px}.filters{gap:2px}.filters button{padding:9px 10px;font-size:11px}.index-head{display:none}.reference-list{border-top:1px solid var(--line)}.reference{grid-template-columns:25px 1fr 20px;gap:0 12px;padding:24px 0}.reference-number{grid-row:1/3;font-size:11px;padding-top:1px}.reference-name{grid-column:2}.reference-arrow{grid-column:3;grid-row:1;font-size:22px}.reference>p{grid-column:2;max-width:none;margin-top:12px;font-size:13px}.reference h3{font-size:24px}.reference-meta{font-size:9px}.topic{font-size:8px}.about{grid-template-columns:1fr;gap:18px;padding:35px 0}.about h2{font-size:27px}.library-footer{align-items:start;flex-wrap:wrap;gap:15px;font-size:10px}.library-footer>span:first-child{width:100%}.library-footer a{margin-left:auto}.search-field kbd{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}
@media(max-width:620px){.topic{font-size:9px}.reference-meta{font-size:10px}}
.course-invitation{border-top:1px solid var(--line);padding:27px 0 32px;display:grid;grid-template-columns:1.5fr 1fr;gap:50px;align-items:center}.course-invitation h2{font:400 28px var(--serif);letter-spacing:-.02em;color:var(--forest);margin:12px 0}.course-invitation p{font-size:14px;color:var(--muted);line-height:1.7;max-width:550px;margin:0}.course-invitation-action{justify-self:end;display:flex;align-items:start;flex-direction:column;gap:18px}.course-invitation-action>span{font:10px var(--mono);color:var(--muted)}
@media(max-width:620px){.masthead .nav-about{display:none}.course-invitation{grid-template-columns:1fr;gap:22px;padding:25px 0 30px}.course-invitation-action{justify-self:start}.course-invitation h2{font-size:26px}.masthead nav{gap:20px}}
@media(max-width:480px){.masthead{flex-wrap:wrap}.masthead nav{flex-basis:100%;margin-left:0;justify-content:space-between;gap:18px}}