/* Technical reading room: precision, warm paper, and quiet depth. */
.articles-dialog .articles-inner{position:relative;isolation:isolate;min-height:min(690px,78vh);overflow-x:hidden;background:radial-gradient(ellipse at 50% 2%,rgba(116,174,192,.14),transparent 42%),linear-gradient(180deg,#eaf0f2 0%,#e2e9eb 100%);color:#203746}
.articles-dialog .articles-inner::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.23;background-image:repeating-linear-gradient(0deg,transparent 0 5px,rgba(40,60,70,.025) 6px)}
html[data-theme="dark"] .articles-dialog .articles-inner{background:radial-gradient(ellipse at 50% 2%,rgba(71,132,156,.18),transparent 44%),linear-gradient(180deg,#142632 0%,#101e28 100%);color:#e8f0f3}
.articles-dialog .articles-header{position:relative;z-index:1;margin-bottom:17px}
.library-shelf-area{position:relative;z-index:1;padding:0 2px 22px}
.library-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;margin:0 0 16px;padding:0 2px 13px;border-bottom:1px solid rgba(48,76,90,.16)}
.library-heading-copy h3{margin:0;color:#213b4b;font-size:clamp(19px,2.6vw,25px);font-weight:780;line-height:1.2;letter-spacing:-.025em}
.library-heading-copy p{margin:5px 0 0;color:#607784;font-size:12px;line-height:1.5}
.library-volume-count{flex:0 0 auto;padding:6px 9px;border:1px solid #c7d3d8;border-radius:7px;background:rgba(255,255,255,.6);color:#546b77;font:750 9px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em}
.library-bookcase{position:relative;padding:17px 17px 0;border:1px solid rgba(40,69,84,.16);border-radius:13px 13px 8px 8px;background:linear-gradient(145deg,rgba(255,255,255,.52),rgba(215,226,230,.42));box-shadow:inset 0 1px 0 rgba(255,255,255,.82),0 14px 30px rgba(29,56,72,.07)}
.library-bookcase::before{content:"";position:absolute;left:18px;right:18px;bottom:12px;height:16px;border-radius:3px;background:linear-gradient(180deg,#c2cfd3,#a9b9bf 38%,#93a7af 100%);box-shadow:0 5px 10px rgba(34,53,62,.16),inset 0 1px 0 rgba(255,255,255,.68)}
.library-bookcase::after{content:"";position:absolute;left:27px;right:27px;bottom:0;height:12px;border-radius:0 0 5px 5px;background:linear-gradient(180deg,#a7b7bd,#d4dde0);clip-path:polygon(0 0,100% 0,96% 100%,4% 100%);opacity:.9}
.library-bookshelf{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));align-items:end;justify-items:center;gap:clamp(10px,2vw,24px);padding:10px 12px 25px;perspective:1100px}
.library-book{--book-accent:#24536b;position:relative;display:flex;flex-direction:column;align-items:center;gap:7px;width:min(100%,172px);padding:0;border:0;background:transparent;color:#324b5a;text-align:center;cursor:pointer;perspective:900px;transform-style:preserve-3d;transition:transform .28s cubic-bezier(.2,.7,.2,1),filter .25s ease}
.library-book:hover,.library-book:focus-visible{z-index:4;transform:translateY(-7px) rotateY(-4deg);filter:drop-shadow(0 13px 12px rgba(25,49,62,.2));outline:none}
.library-book:focus-visible .library-book-jacket{outline:3px solid #2494b8;outline-offset:4px}
.library-book-jacket{position:relative;display:block;width:100%;aspect-ratio:.68;max-height:244px;min-height:186px;transform-style:preserve-3d;filter:drop-shadow(0 8px 8px rgba(18,42,54,.2));transition:transform .34s cubic-bezier(.2,.7,.2,1),filter .3s ease}
.library-book-jacket::before{content:"";position:absolute;z-index:0;inset:2px 3px 0 13px;border:1px solid rgba(255,255,255,.24);border-radius:3px 6px 6px 3px;background:linear-gradient(145deg,rgba(255,255,255,.11),transparent 36%),linear-gradient(90deg,rgba(0,0,0,.2),transparent 9%,transparent 93%,rgba(255,255,255,.13)),var(--book-accent);box-shadow:inset 0 1px rgba(255,255,255,.25),inset 0 -2px rgba(0,0,0,.13);transform:translateZ(4px)}
.library-book-jacket::after{content:"";position:absolute;z-index:-1;top:5px;right:0;bottom:3px;width:calc(100% - 11px);border-radius:3px 5px 5px 3px;background:repeating-linear-gradient(180deg,#e9e6dc 0 1px,#d4d4ca 1px 2px);transform:translateZ(-2px) translateX(3px);box-shadow:2px 3px 3px rgba(14,31,42,.17)}
.library-book-spine{position:absolute;z-index:2;left:0;top:3px;bottom:1px;width:28px;border:1px solid rgba(255,255,255,.2);border-right-color:rgba(8,24,34,.36);border-radius:5px 1px 1px 5px;background:linear-gradient(90deg,rgba(0,0,0,.27),rgba(255,255,255,.1) 25%,rgba(0,0,0,.08) 90%),var(--book-accent);box-shadow:inset 1px 0 rgba(255,255,255,.25);transform:translateZ(8px)}
.library-spine-rib{position:absolute;left:5px;right:4px;top:9px;height:4px;border-top:1px solid rgba(245,241,225,.57);border-bottom:1px solid rgba(245,241,225,.36)}
.library-spine-title{position:absolute;left:50%;top:50%;width:210px;max-width:210px;overflow:hidden;transform:translate(-50%,-50%) rotate(-90deg);transform-origin:center;color:#f4f1e6;font:750 9px/1.15 system-ui,-apple-system,"Segoe UI",sans-serif;letter-spacing:.045em;text-overflow:ellipsis;white-space:nowrap;text-shadow:0 1px 2px rgba(0,0,0,.3)}
.library-spine-mark{position:absolute;left:0;right:0;bottom:9px;color:rgba(250,246,232,.72);font:700 8px/1 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em}
.library-book-front{position:absolute;z-index:1;inset:3px 4px 4px 28px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:16px 11px 14px;border:1px solid rgba(255,255,255,.18);border-radius:2px 5px 5px 2px;background:linear-gradient(143deg,rgba(255,255,255,.12),transparent 34%),linear-gradient(90deg,rgba(0,0,0,.13),transparent 17%,transparent 100%),var(--book-accent);color:#f5f2e8;transform:translateZ(7px);box-shadow:inset 0 1px rgba(255,255,255,.25),inset 0 -2px rgba(0,0,0,.12)}
.library-book-series{font:700 7px/1.35 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.12em;opacity:.78}
.library-book-emblem{display:grid;place-items:center;width:40px;height:40px;border:1px solid rgba(255,255,255,.44);border-radius:50%;color:#f7f3e8;font:500 20px/1 Georgia,serif;box-shadow:inset 0 0 0 4px rgba(255,255,255,.045)}
.library-book-category{font:750 8px/1.3 system-ui,-apple-system,"Segoe UI",sans-serif;letter-spacing:.12em;text-align:center;text-transform:uppercase;opacity:.82}
.library-book-title{display:-webkit-box;max-width:100%;overflow:hidden;color:#fffdf7;font:760 clamp(12px,1.25vw,15px)/1.35 system-ui,-apple-system,"Segoe UI",sans-serif;text-align:center;text-wrap:balance;-webkit-box-orient:vertical;-webkit-line-clamp:4}
.library-book-footer{position:absolute;right:10px;bottom:8px;left:10px;padding-top:7px;border-top:1px solid rgba(255,255,255,.28);color:rgba(255,255,255,.78);font:700 7px/1 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em}
.library-book-pages{position:absolute;z-index:-2;top:8px;right:-2px;bottom:6px;width:8px;border-radius:0 3px 3px 0;background:repeating-linear-gradient(180deg,#e9e6dc 0 1px,#c7c9c2 1px 2px);transform:translateZ(-4px)}
.library-book-instruction{color:#657986;font:750 9px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.12em;transition:color .2s ease,opacity .2s ease}
.library-book:hover .library-book-instruction,.library-book:focus-visible .library-book-instruction{color:#1d708d}
.library-book.is-extracted{z-index:8;animation:library-book-pull .54s cubic-bezier(.17,.76,.26,1) both}
.library-book.is-extracted .library-book-jacket{transform:translateY(-16px) translateZ(40px) rotateY(-12deg) scale(1.05)}
.library-book.is-returning{z-index:8;animation:library-book-return .48s cubic-bezier(.55,.08,.8,.34) both}
.library-book.is-returning .library-book-jacket{transform:translateY(0) translateZ(0) rotateY(0) scale(1)}
@keyframes library-book-pull{0%{transform:translateY(0) scale(1)}55%{transform:translateY(-24px) scale(1.06)}100%{transform:translateY(-13px) scale(1.03);opacity:.18}}
@keyframes library-book-return{0%{transform:translateY(-13px) scale(1.03);opacity:.2}60%{transform:translateY(-5px) scale(1.02);opacity:1}100%{transform:translateY(0) scale(1);opacity:1}}
.library-reading-brand{display:flex;align-items:center;gap:9px;color:#5f7380;font:750 9px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.11em}
.library-reading-brand-mark{display:grid;place-items:center;width:27px;height:25px;border:1px solid #bdccd2;border-radius:5px;background:#f3f6f5;color:#345365;font-size:9px;letter-spacing:.02em}
.library-reader{position:fixed;z-index:2147482000;inset:0;display:flex;align-items:center;justify-content:center;overflow:auto;padding:clamp(12px,2.5vw,25px);background:rgba(218,227,230,.9);backdrop-filter:blur(18px) saturate(1.12);-webkit-backdrop-filter:blur(18px) saturate(1.12);perspective:1700px}
.library-reader[hidden]{display:none!important}
html[data-theme="dark"] .library-reader{background:rgba(8,18,26,.92)}
.library-reader-shell{position:relative;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:14px;width:min(900px,100%);max-height:100%;min-height:490px;opacity:0;transform:translateY(17px) scale(.96) rotateX(2deg);filter:blur(4px)}
.library-reader.is-opening .library-reader-shell{animation:library-reader-enter .62s cubic-bezier(.2,.74,.22,1) .12s both}
.library-reader.is-closing .library-reader-shell{animation:library-reader-exit .48s cubic-bezier(.54,.06,.78,.35) both}
@keyframes library-reader-enter{0%{opacity:0;transform:translateY(22px) scale(.94) rotateX(5deg);filter:blur(5px)}100%{opacity:1;transform:translateY(0) scale(1) rotateX(0);filter:blur(0)}}
@keyframes library-reader-exit{0%{opacity:1;transform:translateY(0) scale(1);filter:blur(0)}100%{opacity:0;transform:translateY(16px) scale(.965);filter:blur(3px)}}
.library-reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:40px}
.library-back,.library-reader-close{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:38px;padding:8px 12px;border:1px solid #bdcbd1;border-radius:9px;background:rgba(250,252,251,.82);color:#304b5b;font:750 10px/1 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em;cursor:pointer;transition:background .2s ease,border-color .2s ease,transform .2s ease}
.library-back:hover,.library-reader-close:hover{transform:translateY(-1px);background:#fff;border-color:#8fa9b5}
.library-back span:first-child{font:500 19px/1 system-ui,sans-serif}
.library-reader-close{width:38px;min-width:38px;padding:0;font:400 23px/1 system-ui,sans-serif}
.library-open-book{position:relative;display:grid;grid-template-columns:104px minmax(0,1fr);width:100%;min-height:0;max-height:100%;border:1px solid #aab9bc;border-radius:10px 16px 16px 10px;background:linear-gradient(90deg,#dfe4df 0,#faf9f2 3%,#f8f7f0 99%,#d7ddd8 100%);box-shadow:0 28px 65px rgba(28,49,59,.26),0 7px 16px rgba(24,43,52,.12),inset 0 1px 0 rgba(255,255,255,.88);transform-style:preserve-3d;transform-origin:center;overflow:hidden}
html[data-theme="dark"] .library-open-book{border-color:#435966;background:linear-gradient(90deg,#293a43 0,#202e36 3%,#1c2931 99%,#293840 100%);box-shadow:0 28px 65px rgba(0,0,0,.42),0 7px 16px rgba(0,0,0,.25),inset 0 1px rgba(255,255,255,.08)}
.library-open-book::before{content:"";position:absolute;z-index:7;inset:0;border-radius:inherit;pointer-events:none;background:linear-gradient(110deg,rgba(255,255,255,.24),transparent 14%,transparent 87%,rgba(21,48,60,.1));opacity:.8}
.library-reading-spine{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:18px;padding:22px 10px 18px;border-right:1px solid rgba(50,71,78,.17);background:linear-gradient(90deg,#e1e5de,#f0efe6 23%,#e8e8df);color:#53676f}
html[data-theme="dark"] .library-reading-spine{border-color:#394b55;background:linear-gradient(90deg,#25343b,#314149 24%,#27353b);color:#c1d0d5}
.library-reading-number{font:750 10px/1 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.14em}
.library-reading-spine-title{writing-mode:vertical-rl;transform:rotate(180deg);max-height:240px;overflow:hidden;color:#344f5c;font:750 12px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;letter-spacing:.045em;text-align:center}
html[data-theme="dark"] .library-reading-spine-title{color:#e0eaed}
.library-reading-spine-rule{width:25px;height:2px;background:#8fa5ab}
.library-page-face{position:relative;display:flex;flex-direction:column;min-width:0;min-height:0;padding:clamp(22px,4vw,48px) clamp(20px,5.4vw,66px) 24px;background:radial-gradient(ellipse at 90% 0,rgba(215,227,222,.36),transparent 38%),linear-gradient(180deg,#fcfbf6,#f5f3ec);color:#263b47;opacity:0;transform:translateX(8px);transition:opacity .48s ease .28s,transform .5s cubic-bezier(.2,.72,.22,1) .28s}
.library-reader.is-open .library-page-face{opacity:1;transform:translateX(0)}
html[data-theme="dark"] .library-page-face{background:radial-gradient(ellipse at 90% 0,rgba(63,97,109,.17),transparent 40%),linear-gradient(180deg,#223039,#1b272e);color:#dce6e9}
.library-page-meta{display:flex;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px solid #d5ddd9;color:#74858b;font:700 9px/1.3 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.1em;text-transform:uppercase}
html[data-theme="dark"] .library-page-meta{border-color:#43535a;color:#afbec4}
.library-page-face>h2{margin:22px 0 18px;color:#203b4b;font-size:clamp(22px,3.3vw,34px);line-height:1.22;letter-spacing:-.025em;text-wrap:balance}
html[data-theme="dark"] .library-page-face>h2{color:#f1f6f7}
.library-reading-pages{position:relative;min-height:0;flex:1;overflow:auto;padding:0 4px 8px 0;scrollbar-width:thin;scrollbar-color:#a8b9bb transparent}
html[data-theme="dark"] .library-reading-pages{scrollbar-color:#536e79 transparent}
.library-reading-page[hidden]{display:none!important}
.library-article-content{padding:0;border:0;border-radius:0;background:transparent!important;box-shadow:none!important;color:#42535d;font-size:14px;line-height:1.8}
.library-article-content p{margin:0 0 15px;color:#43545e}
.library-article-content h3,.library-article-content h4{color:#243f4d}
.library-article-content strong{color:#203f52}
.library-article-content .article-lead{margin-bottom:19px;padding:13px 15px;border-left:3px solid #568899;border-radius:0 8px 8px 0;background:#eaf0ee;color:#304a56}
.library-article-content .article-alert{margin-top:16px;padding:13px 15px;border:1px solid #d7b69d;border-radius:9px;background:#f7ede4;color:#62483a}
html[data-theme="dark"] .library-article-content,html[data-theme="dark"] .library-article-content p{color:#d3dee2}
html[data-theme="dark"] .library-article-content h3,html[data-theme="dark"] .library-article-content h4{color:#f0f5f6}
html[data-theme="dark"] .library-article-content strong{color:#f8fbfc}
html[data-theme="dark"] .library-article-content .article-lead{border-color:#73b7c6;background:#283e47;color:#e2edf0}
html[data-theme="dark"] .library-article-content .article-alert{border-color:#98604d;background:#3b292b!important;color:#fff0e8!important}
html[data-theme="dark"] .library-article-content .article-alert strong{color:#fff8f0!important}
.library-reader-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#76878b;font:700 9px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em}
.library-page-nav{padding:8px 10px;border:1px solid #c4d0d2;border-radius:8px;background:rgba(255,255,255,.62);color:#405d69;font:700 9px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.04em;cursor:pointer;transition:background .18s ease,border-color .18s ease,color .18s ease}
.library-page-nav:hover:not(:disabled){border-color:#829eaa;background:#fff;color:#1c4253}
.library-page-nav:disabled{opacity:.42;cursor:default}
html[data-theme="dark"] .library-reader-footer{color:#a6b7be}
html[data-theme="dark"] .library-page-nav{border-color:#465b64;background:#25343b;color:#dce7eb}
html[data-theme="dark"] .library-page-nav:hover:not(:disabled){border-color:#7295a1;background:#30434b;color:#fff}
.shelf-library-caption{display:flex;align-items:center;gap:9px;margin:15px 0 0;color:#72838a;font:700 9px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em}
.shelf-library-caption::before{content:"";width:19px;height:1px;background:#94a9af}
html[data-theme="dark"] .shelf-library-caption{color:#a8b8be}
html[data-theme="dark"] .shelf-library-caption::before{background:#617985}
@media(max-width:680px){.articles-dialog .articles-inner{min-height:78vh}.library-bookcase{padding:12px 8px 0}.library-bookshelf{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px 12px;padding:8px 7px 25px}.library-book{width:min(100%,155px)}.library-book-jacket{min-height:176px;max-height:212px}.library-spine-title{width:188px;font-size:8.5px}.library-reader{padding:10px}.library-reader-shell{min-height:min(610px,84vh);gap:10px}.library-reading-brand{font-size:8px;letter-spacing:.06em}.library-open-book{grid-template-columns:55px minmax(0,1fr);border-radius:7px 11px 11px 7px}.library-reading-spine{padding:15px 6px}.library-reading-spine-title{font-size:10px}.library-page-face{padding:20px 16px 16px}.library-page-meta{font-size:7px;letter-spacing:.055em}.library-page-face>h2{margin:17px 0 13px;font-size:22px}.library-article-content{font-size:13px;line-height:1.7}.library-back{padding:8px 9px;font-size:9px}.library-reader-close{flex-basis:35px;width:35px;min-width:35px;height:35px}.library-reader-footer{font-size:8px}.library-page-nav{padding:8px;font-size:8px}}
@media(max-width:380px){.library-book-jacket{min-height:158px}.library-book-title{font-size:11px}.library-reading-brand span:last-child{max-width:100px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.library-reading-spine-title{font-size:8px}.library-page-face{padding:17px 13px}.library-page-face>h2{font-size:19px}}
@media(prefers-reduced-motion:reduce){.library-book,.library-book-jacket,.library-reader-shell,.library-page-face,.library-book-instruction,.library-reader-close,.library-back,.library-page-nav{transition:none!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.library-reader.is-opening .library-reader-shell,.library-reader.is-closing .library-reader-shell{animation:none!important;opacity:1;transform:none}}

/* Hinged archival cover: the jacket rotates away to reveal the paper page. */
.library-opening-cover{position:absolute;z-index:8;inset:0;border:1px solid rgba(255,255,255,.28);border-radius:9px 15px 15px 9px;background:linear-gradient(140deg,rgba(255,255,255,.13),transparent 28%),linear-gradient(90deg,rgba(0,0,0,.32),transparent 7%,transparent 97%,rgba(255,255,255,.14)),var(--reader-accent,#294f64);color:#f4f1e7;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;transform-origin:left center;transform:rotateY(0);backface-visibility:hidden;transform-style:preserve-3d;box-shadow:inset 1px 0 rgba(255,255,255,.28),inset 0 -2px rgba(0,0,0,.16);transition:transform .74s cubic-bezier(.22,.72,.18,1),opacity .35s ease .38s;pointer-events:none}
.library-opening-cover::before{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.25);border-radius:5px;box-shadow:inset 0 0 0 4px rgba(255,255,255,.025)}
.library-opening-cover::after{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(100deg,rgba(255,255,255,.16),transparent 20%,transparent 83%,rgba(0,0,0,.14));pointer-events:none}
.library-reader.is-open .library-opening-cover{transform:rotateY(-158deg);opacity:.1}
.library-reader.is-closing .library-opening-cover{transform:rotateY(0);opacity:1;transition:transform .53s cubic-bezier(.45,.04,.8,.36),opacity .2s ease}
.library-cover-brand,.library-cover-bottom{position:relative;z-index:1;color:rgba(255,255,255,.78);font:750 9px/1.3 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.16em;text-align:center}
.library-cover-emblem{position:relative;z-index:1;display:grid;place-items:center;width:58px;height:58px;border:1px solid rgba(255,255,255,.54);border-radius:50%;font:500 26px/1 Georgia,serif;box-shadow:inset 0 0 0 5px rgba(255,255,255,.035),0 8px 20px rgba(0,0,0,.12)}
.library-cover-title{position:relative;z-index:1;max-width:min(70%,480px);color:#fffdf6;font:800 clamp(18px,3vw,29px)/1.25 system-ui,-apple-system,"Segoe UI",sans-serif;letter-spacing:.015em;text-align:center;text-wrap:balance}
.library-reader.is-closing .library-page-face{opacity:0;transform:translateX(12px);transition:opacity .22s ease,transform .3s ease}
.library-reading-pages .article-case{margin:16px 0;padding:13px 15px;border:1px solid #cbd8d5;border-radius:9px;background:#edf1ed;color:#3b505a}
.library-reading-pages .article-case-label{display:block;margin-bottom:6px;color:#617983;font:750 9px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.075em;text-transform:uppercase}
html[data-theme="dark"] .library-reading-pages .article-case{border-color:#40535b;background:#26343a;color:#d8e2e5}
html[data-theme="dark"] .library-reading-pages .article-case-label{color:#b1c2c9}
@media(max-width:680px){.library-opening-cover{gap:14px;border-radius:7px 11px 11px 7px}.library-opening-cover::before{inset:8px}.library-cover-brand,.library-cover-bottom{font-size:7px;letter-spacing:.09em}.library-cover-emblem{width:45px;height:45px;font-size:21px}.library-cover-title{max-width:80%;font-size:clamp(15px,4.5vw,22px)}}