@charset "UTF-8";
:root{color-scheme:light;--ink:#1d1d1f;--secondary:#6e6e73;--quiet:#86868b;--surface:#f5f5f7;--line:#e8e8ed;--accent:#235ac9;--accent-hover:#1a47a8;--navy:#172e48;--accent-soft:#edf2fc;--font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;--ease:cubic-bezier(.22,.61,.36,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:#fff;color:var(--ink);font:16px/1.7 var(--font);-webkit-font-smoothing:antialiased}button,input{font:inherit}a{color:inherit;text-decoration:none}button{cursor:pointer;color:inherit}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:5px}::selection{background:#dce7fa}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.13;font-weight:600}svg,img{display:block;max-width:100%}[hidden]{display:none!important}.wrap{width:min(1120px,calc(100% - 96px));margin-inline:auto}.skip-link{position:fixed;z-index:100;top:-100px;left:20px;padding:10px 20px;border-radius:30px;background:var(--ink);color:#fff}.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.84);backdrop-filter:saturate(160%) blur(24px);-webkit-backdrop-filter:saturate(160%) blur(24px);border-bottom:1px solid #0000000e}.header-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;white-space:nowrap}.brand-mark{width:25px;height:25px}.brand-name{font-size:16px;font-weight:600;letter-spacing:-.025em}.main-nav{display:flex;align-items:center;gap:30px;margin-left:auto}.main-nav a{font-size:12px;color:#5b5b60;white-space:nowrap;transition:color .2s}.main-nav a:hover,.main-nav a[aria-current=page]{color:var(--accent)}.header-actions{display:flex;align-items:center;gap:14px}.language-switch{display:flex;align-items:center;background:var(--surface);border-radius:30px;padding:3px;flex-shrink:0}.language-switch a{display:grid;place-items:center;height:28px;min-width:39px;padding:0 8px;font-size:10px;color:var(--secondary);border-radius:20px;transition:background .2s,color .2s}.language-switch a[aria-current=true]{background:#fff;color:var(--ink);box-shadow:0 1px 4px #0000000a}.language-switch a:hover{color:var(--accent)}.menu-toggle{display:none;align-items:center;justify-content:center;width:32px;height:34px;border:0;background:transparent}.menu-toggle svg{width:20px;height:20px}.prototype-strip{padding:9px 20px;color:#78787e;background:#fafafa;text-align:center;font-size:10px;letter-spacing:.01em}
.hero{padding:64px 0 76px;text-align:center}.hero-eyebrow{font-size:13px;font-weight:500;color:var(--secondary);letter-spacing:.02em;margin-bottom:23px}.hero h1{font-size:clamp(66px,7.4vw,104px);letter-spacing:normal;line-height:1.14;font-weight:600}.hero-line{display:block;width:fit-content;max-width:100%;margin-inline:auto}html[lang=en] .hero h1{font-size:clamp(52px,6vw,88px)}.hero-line:first-child{color:var(--navy)}.hero-line:last-child{color:#77777c}.hero-description{font-size:20px;line-height:1.6;text-wrap:balance;color:var(--secondary);margin:28px auto 0;max-width:530px;letter-spacing:-.025em}.hero-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;width:min(100%,360px);margin:28px auto 0}.hero-actions .button{min-width:0;white-space:nowrap}.button{display:inline-flex;justify-content:center;align-items:center;gap:14px;border-radius:999px;padding:12px 25px;background:#fff;color:var(--navy);border:1px solid #bdc9d8;font-size:13px;line-height:1.5;transition:background .25s,border-color .25s,color .25s}.button:hover,.button:focus-visible{background:var(--accent);border-color:var(--accent);color:#fff}.text-link{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-size:14px;line-height:1.6}.arrow{display:inline-block;font-family:Arial,sans-serif;transition:transform .3s var(--ease);font-size:17px;line-height:1}a:hover>.arrow{transform:translateX(3px)}
.section{padding:112px 0}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:46px}.eyebrow{color:var(--accent);font-size:13px;margin-bottom:17px;font-weight:500}.section-heading h2{font-size:clamp(38px,4.1vw,56px);letter-spacing:-.045em}.section-heading .text-link{flex-shrink:0;padding-bottom:4px}.section-intro{font-size:17px;line-height:1.7;color:var(--secondary);margin-top:18px;max-width:650px}.topics-section{background:var(--surface)}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.topic-card{min-height:385px;position:relative;padding:38px 39px 25px;background:linear-gradient(180deg,var(--topic-tint,#e9f0fa) 0%,#fff 100%);border-radius:26px;overflow:hidden;display:flex;flex-direction:column;transition:transform .45s var(--ease),box-shadow .45s}.topic-card:hover{transform:translateY(-4px);box-shadow:0 15px 35px #00000005}.topic-number{color:var(--accent);font-size:12px;font-variant-numeric:tabular-nums;margin-bottom:18px}.topic-card :is(h2,h3){font-size:29px;letter-spacing:-.04em}.topic-card p{color:var(--secondary);font-size:15px;line-height:1.8;max-width:390px;margin-top:16px}.topic-card-bottom{margin-top:auto;display:flex;align-items:flex-end;justify-content:space-between;gap:25px;padding-top:14px}.topic-card-art{--art-ink:#8492a6;--art-line:#d3dae4;--art-surface:#f1f4f8;--art-text:#65758b;width:185px;height:105px}.round-arrow{display:grid;place-items:center;width:31px;height:31px;border-radius:50%;background:var(--surface);color:#58585c;margin-bottom:9px;flex-shrink:0;transition:background .2s,color .2s}.topic-card:hover .round-arrow{background:var(--accent);color:#fff}.topic-note{color:#77777d;font-size:11px;margin-top:25px;text-align:center}
.latest-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}.seminar-preview{position:relative;min-height:350px;background:var(--navy);color:#fff;border-radius:26px;padding:40px;overflow:hidden;display:flex;flex-direction:column;align-items:flex-start}.seminar-preview:after{content:"";position:absolute;width:260px;height:260px;right:-88px;bottom:-130px;border:1px solid #ffffff25;border-radius:50%;box-shadow:0 0 0 22px #ffffff06,0 0 0 44px #ffffff04,0 0 0 66px #ffffff03;pointer-events:none}.status-label{font-size:11px;color:#b9c9e0;letter-spacing:.02em}.seminar-preview h3{font-size:42px;font-weight:600;letter-spacing:-.045em;margin:25px 0 17px}.seminar-preview p{font-size:14px;color:#c2cfe0;max-width:330px}.seminar-preview .text-link{color:#fff;margin-top:auto;padding-top:32px}.activity-preview{background:var(--surface);padding:40px;border-radius:26px;display:flex;flex-direction:column;justify-content:center}.small-overline{font-size:11px;color:var(--secondary)}.activity-preview h3{font-size:29px;font-weight:600;letter-spacing:-.035em;margin-top:21px;line-height:1.35}.activity-preview p{font-size:14px;color:var(--secondary);margin-top:16px;line-height:1.85}.empty-line{font-size:11px;margin-top:27px;color:var(--quiet)}
.resources-section{background:var(--surface)}.resources-band{display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:center}.resources-band h2{font-size:47px;letter-spacing:-.045em;line-height:1.25}.resources-band p{font-size:16px;color:var(--secondary);line-height:1.9;margin-top:24px;max-width:380px}.resource-path{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:23px 0;border-bottom:1px solid #dcdce1;font-size:17px;font-weight:500}.resource-path small{display:block;font-size:12px;color:var(--secondary);font-weight:400;margin-top:6px}.resource-path .arrow{color:var(--quiet)}.resource-path:hover{color:var(--accent)}.join-section{text-align:center;padding-top:122px;padding-bottom:128px}.join-section h2{width:fit-content;max-width:100%;margin-inline:auto;font-size:clamp(42px,5vw,64px);letter-spacing:normal;line-height:1.25;text-wrap:balance}.join-section>p:not(.eyebrow){font-size:17px;line-height:1.8;text-wrap:balance;color:var(--secondary);margin:25px auto 0;max-width:550px}.join-section .button{margin-top:30px}.site-footer{background:var(--surface);padding:35px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}.footer-brand{font-size:12px;font-weight:500}.footer-note{font-size:10px;color:var(--quiet);margin-top:6px}.footer-links{display:flex;gap:23px;font-size:11px;color:var(--secondary)}.footer-links a:hover{color:#000}
.breadcrumb{display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding-top:30px;font-size:11px;color:var(--secondary)}.breadcrumb a:hover{color:var(--accent)}.page-hero{padding-top:63px;padding-bottom:57px}.page-hero .eyebrow{margin-bottom:20px}.page-hero h1{font-size:clamp(48px,5.7vw,76px);letter-spacing:-.05em;max-width:950px}.page-hero>p{max-width:760px;font-size:20px;line-height:1.75;color:var(--secondary);margin-top:26px}.draft-note{margin-top:27px;font-size:11px;color:#77777d;line-height:1.9}.topic-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:100px;padding-top:24px;padding-bottom:100px;border-top:1px solid var(--line)}.article-section{padding:44px 0;border-bottom:1px solid var(--line);scroll-margin-top:100px}.article-section:last-child{border-bottom:0}.article-section h2{font-size:29px;letter-spacing:-.035em;margin-bottom:25px}.article-section>p{font-size:15px;line-height:1.95;color:var(--secondary)}.article-section .lead-question{font-size:21px;color:var(--ink);line-height:1.7;margin-bottom:21px}.focus-list{margin:25px 0 0;padding-left:18px;font-size:14px;color:var(--secondary);display:grid;gap:9px}.workflow-list{list-style:none;padding:0;margin:0;counter-reset:steps}.workflow-list li{display:grid;grid-template-columns:29px 1fr;gap:20px;counter-increment:steps;margin-top:30px}.workflow-list li:before{content:"0" counter(steps);font-size:12px;color:var(--quiet);padding-top:3px}.workflow-list h3{font-size:17px;letter-spacing:-.02em;line-height:1.4}.workflow-list p{font-size:14px;color:var(--secondary);line-height:1.9;margin-top:9px}
.topic-sidebar{padding-top:45px}.sidebar-box{margin-bottom:38px}.sidebar-box h2{font-size:13px;margin-bottom:19px}.sidebar-box nav{display:flex;flex-direction:column;gap:12px;font-size:12px;color:var(--secondary)}.sidebar-box nav a:hover{color:var(--accent)}.sidebar-box.pale{background:var(--surface);border-radius:20px;padding:24px}.meta-row{margin-top:18px;font-size:12px;color:var(--secondary)}.meta-row strong{display:block;font-size:11px;color:var(--ink);font-weight:500;margin-bottom:5px}.sidebar-box .text-link{font-size:12px;margin-top:22px}.inline-empty{background:var(--surface);border-radius:18px;padding:26px}.inline-empty h3{font-size:15px;font-weight:500;line-height:1.5}.inline-empty p{color:var(--secondary);font-size:13px;margin-top:10px;line-height:1.9}.inline-empty .text-link{margin-top:17px;font-size:12px}.space-top{margin-top:25px}.related-topics{padding:35px 0 65px;border-top:1px solid var(--line)}.related-topics>p{font-size:12px;color:var(--secondary);margin-bottom:20px}.related-links{display:flex;gap:28px;flex-wrap:wrap}.related-links .text-link{font-size:14px}
.filter-section{padding-bottom:100px}.filter-toolbar{display:flex;align-items:center;justify-content:space-between;gap:22px;margin-bottom:35px}.filter-buttons{display:flex;flex-wrap:wrap;gap:8px}.filter-buttons button{border:0;background:var(--surface);padding:9px 17px;border-radius:30px;font-size:12px;transition:color .2s,background .2s}.filter-buttons button[aria-pressed=true]{background:var(--accent);color:#fff}.filter-buttons button:hover{box-shadow:inset 0 0 0 1px #00000015}.filter-status{color:var(--quiet);font-size:11px;flex-shrink:0}.large-empty{background:var(--surface);padding:75px 30px;border-radius:26px;text-align:center}.empty-symbol{font-size:32px;color:#ababaf;margin-bottom:20px;font-weight:300}.large-empty h2{font-size:29px;letter-spacing:-.04em}.large-empty p{max-width:510px;margin:20px auto 0;color:var(--secondary);font-size:14px;line-height:1.95}.large-empty .text-link{margin-top:27px}.collection-map{margin-top:65px}.collection-map h2{font-size:27px;letter-spacing:-.035em;margin-bottom:30px}.collection-map-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.collection-map-grid a{border-bottom:1px solid var(--line);padding:22px 5px}.collection-map-grid h3{font-size:16px;font-weight:500}.collection-map-grid p{font-size:12px;color:var(--secondary);margin-top:9px}.collection-map-grid a:hover h3{color:var(--accent)}.entry-list{display:grid;gap:18px}.entry{background:var(--surface);padding:30px;border-radius:20px}.entry-meta{display:flex;gap:20px;flex-wrap:wrap;font-size:11px;color:var(--secondary);margin-bottom:14px}.entry h3{font-size:23px;line-height:1.4;letter-spacing:-.03em}.entry p{color:var(--secondary);font-size:14px;margin-top:14px;line-height:1.9;white-space:pre-line}.entry .text-link{margin-top:20px}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;padding:40px 0 80px}.about-grid h2{font-size:32px;letter-spacing:-.035em;line-height:1.3;margin-bottom:26px}.about-grid p{font-size:15px;line-height:1.95;color:var(--secondary)}.about-list{list-style:none;padding:0;margin:30px 0 0}.about-list li{padding:18px 0;border-top:1px solid var(--line);font-size:14px}.about-list strong{display:block;font-weight:500;margin-bottom:5px}.about-list span{color:var(--secondary)}.contact-panel{border-radius:24px;background:var(--surface);padding:38px;align-self:start;scroll-margin-top:110px}.contact-panel h3{font-size:24px;letter-spacing:-.03em;margin-bottom:20px}.contact-panel .text-link{margin-top:25px}.about-steps{max-width:760px;margin-bottom:80px}.error-page{text-align:center;padding:110px 0 130px}.error-page h1{font-size:120px;letter-spacing:-.06em}.error-page p{margin:25px auto 30px;color:var(--secondary)}
/* Content is visible without JavaScript. Motion is enabled progressively. */
[data-reveal]{transition:opacity .85s var(--ease),transform .85s var(--ease)}[data-reveal].reveal-pending{opacity:0;transform:translateY(22px)}[data-reveal].is-visible{opacity:1;transform:translateY(0)}
@media(min-width:1500px){.hero{padding-top:80px}}
@media(max-width:1050px){.wrap{width:calc(100% - 64px)}.main-nav{gap:21px}.header-inner{gap:22px}.main-nav a{font-size:11px}.brand-name{font-size:14px}.section{padding:88px 0}.topic-card{padding:30px;min-height:385px}.topic-card :is(h2,h3){font-size:26px}.topic-layout{gap:45px;grid-template-columns:minmax(0,1fr) 210px}.resources-band{gap:45px}.resources-band h2{font-size:41px}.about-grid{gap:45px}html[lang=en] .main-nav{gap:17px}html[lang=en] .brand-name{font-size:13px}}
@media(max-width:800px){.main-nav{display:none;position:absolute;inset:64px 0 auto;background:rgba(255,255,255,.98);padding:18px 24px 26px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0}.main-nav.is-open{display:flex}.main-nav a{padding:12px 0;font-size:16px}html[lang=en] .main-nav{gap:0}.menu-toggle{display:flex}.header-inner{min-height:64px}.brand-name,html[lang=en] .brand-name{font-size:15px}.header-actions{margin-left:auto}.hero h1{font-size:68px}.topic-layout{display:flex;flex-direction:column;gap:0}.topic-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding-top:30px}.topic-sidebar .sidebar-box{margin-bottom:0}.resources-band{grid-template-columns:1fr;gap:35px}.resources-band h2 br{display:none}.resources-band p{max-width:600px}.about-grid{gap:30px}.contact-panel{padding:28px}}
@media(max-width:600px){.wrap{width:calc(100% - 40px)}.header-inner{gap:12px}.brand-mark{width:22px;height:22px}.brand{gap:8px}.brand-name,html[lang=en] .brand-name{font-size:14px}.header-actions{gap:9px}.language-switch a{min-width:33px;padding:0 7px;height:27px}.prototype-strip{font-size:9px;padding:9px 16px}.hero{padding:48px 0 56px}.hero-eyebrow{font-size:11px;margin-bottom:24px}.hero h1{font-size:clamp(40px,11.8vw,62px);line-height:1.23;letter-spacing:normal}html[lang=en] .hero h1{font-size:clamp(27px,7.4vw,42px);letter-spacing:normal}.hero-description{font-size:16px;max-width:300px;margin-top:24px;line-height:1.8}.hero-actions{gap:12px;margin-top:26px}.hero-actions .button{padding-inline:14px;gap:8px}.button{font-size:12px;padding:11px 23px}.text-link{font-size:12px}.section{padding:66px 0}.section-heading{gap:20px;margin-bottom:30px;align-items:flex-start}.section-heading h2{font-size:35px;line-height:1.2;letter-spacing:-.04em}.section-heading>.text-link{padding-top:6px}.eyebrow{font-size:11px;margin-bottom:14px}.section-intro{font-size:14px;line-height:1.85;margin-top:17px}.topic-grid{grid-template-columns:1fr;gap:18px}.topic-card{border-radius:23px;padding:29px 28px 23px;min-height:346px}.topic-number{font-size:11px;margin-bottom:17px}.topic-card :is(h2,h3){font-size:28px}.topic-card p{font-size:14px;line-height:1.9;margin-top:15px}.topic-card-art{width:168px;height:96px}.topic-note{font-size:10px;margin-top:23px}.latest-layout{grid-template-columns:1fr;gap:18px}.seminar-preview{min-height:328px;padding:31px;border-radius:23px}.seminar-preview h3{font-size:37px;margin-top:23px}.seminar-preview p{font-size:13px}.activity-preview{padding:31px;min-height:290px;border-radius:23px}.activity-preview h3{font-size:27px}.activity-preview p{font-size:13px}.resources-band{gap:27px}.resources-band h2{font-size:35px;line-height:1.25}.resources-band h2 br{display:initial}.resources-band p{font-size:14px;margin-top:20px}.resource-path{font-size:16px;padding:20px 0}.resource-path small{font-size:11px}.join-section{padding-top:85px;padding-bottom:90px}.join-section h2{font-size:37px}.join-section>p:not(.eyebrow){font-size:14px;max-width:310px;margin-top:22px}.footer-inner{flex-direction:column;align-items:flex-start;gap:23px}.footer-links{flex-wrap:wrap;gap:23px;font-size:10px}.breadcrumb{padding-top:23px;font-size:10px;gap:9px}.page-hero{padding:44px 0 40px}.page-hero h1{font-size:44px;line-height:1.18}.page-hero>p{font-size:17px;margin-top:23px;line-height:1.85}.draft-note{font-size:10px;margin-top:23px}.topic-layout{padding-top:0;padding-bottom:55px}.article-section{padding:34px 0}.article-section h2{font-size:25px;margin-bottom:24px;line-height:1.35}.article-section>p{font-size:14px}.article-section .lead-question{font-size:19px}.workflow-list li{grid-template-columns:23px 1fr;gap:14px}.workflow-list h3{font-size:16px}.workflow-list p{font-size:13px}.topic-sidebar{grid-template-columns:1fr 1fr;gap:20px}.sidebar-box.pale{padding:19px}.sidebar-box nav{font-size:11px;gap:11px}.meta-row{font-size:11px}.inline-empty{padding:23px}.inline-empty p{font-size:12px}.related-links{gap:17px}.related-links .text-link{font-size:12px}.filter-section{padding-bottom:65px}.filter-toolbar{flex-direction:column;align-items:flex-start;gap:18px}.filter-buttons{gap:7px}.filter-buttons button{padding:8px 14px;font-size:11px}.large-empty{padding:50px 24px;border-radius:23px}.large-empty h2{font-size:25px;line-height:1.4}.large-empty p{font-size:13px}.collection-map{margin-top:45px}.collection-map h2{font-size:24px}.collection-map-grid{grid-template-columns:1fr;gap:0}.entry{padding:24px}.entry h3{font-size:21px}.entry p{font-size:13px}.about-grid{grid-template-columns:1fr;gap:35px;padding:10px 0 40px}.about-grid h2{font-size:29px}.about-grid p{font-size:14px}.contact-panel{padding:27px}.about-steps{margin-bottom:50px}.error-page h1{font-size:100px}}
@media(max-width:360px){.wrap{width:calc(100% - 32px)}.brand-name,html[lang=en] .brand-name{font-size:12px}.header-actions{gap:6px}.hero h1{font-size:39px}.hero-actions{gap:12px}.hero-actions .button{padding-inline:10px;gap:6px}.topic-sidebar{grid-template-columns:1fr;gap:27px}.topic-card{padding:26px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}[data-reveal].reveal-pending{opacity:1;transform:none}.button:hover,.topic-card:hover{transform:none}}
@media print{.site-header,.site-footer,.filter-buttons,.prototype-strip{display:none}.wrap{width:100%}.section,.page-hero{padding:20px 0}[data-reveal].reveal-pending{opacity:1;transform:none}.topic-layout{display:block}.topic-sidebar{display:none}}

/* Full-width navigation panels, a direct mobile menu, and an explicit search dialog. */
:root{--header-height:56px}
html{scrollbar-gutter:stable both-edges}
.site-header{z-index:50;background:rgba(250,250,252,.9);border-bottom-color:transparent;transition:background .2s}
.site-header.is-expanded{background:#fafafc;backdrop-filter:none;-webkit-backdrop-filter:none}
.header-inner{min-height:var(--header-height);height:var(--header-height);gap:30px}
.brand-mark{width:22px;height:22px}.brand-name{font-size:14px}
.main-nav{align-self:stretch;gap:36px;align-items:stretch}
.main-nav .nav-link{display:flex;align-items:center;gap:8px;font-size:12px;outline-offset:-3px}
.nav-item{display:flex;align-items:stretch}
.nav-link[aria-expanded=true]{color:var(--accent)}
.nav-preview{position:absolute;top:100%;inset-inline:0;z-index:1;background:#fafafc;max-height:calc(100dvh - var(--header-height));overflow:auto;overscroll-behavior:contain;animation:panel-arrive .28s var(--ease)}
.nav-preview-card{display:grid;grid-template-columns:1.05fr 1fr;gap:80px;min-height:340px;padding-block:38px 48px}
.nav-preview-label{font-size:12px;font-weight:400;line-height:1.5;color:var(--secondary);margin-bottom:18px}
.nav-preview-description{max-width:400px;color:var(--secondary);font-size:16px;line-height:1.85;text-wrap:pretty}
.nav-preview-links{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;justify-items:start}
.main-nav .nav-preview a{display:block;width:fit-content;max-width:100%;padding:2px 0;font-size:26px;font-weight:600;line-height:1.35;letter-spacing:-.025em;color:var(--navy);white-space:normal;transition:color .18s}
.main-nav .nav-preview a:hover,.main-nav .nav-preview a:focus-visible{color:var(--accent)}
.header-actions{gap:12px}
.icon-button{display:inline-flex;align-items:center;justify-content:center;width:34px;height:36px;padding:7px;border:0;background:transparent;border-radius:7px;flex-shrink:0}
.icon-button svg,.search-field>svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.icon-button:hover{color:var(--accent)}.menu-toggle{display:none}
.language-switch{background:transparent;padding:2px;gap:1px}
.language-switch a{font-size:10px;min-width:34px;height:26px;padding:0 6px}
.language-switch a[aria-current=true]{background:var(--accent-soft);color:var(--accent);box-shadow:none}
.header-panel{position:absolute;top:100%;inset-inline:0;background:#fafafc;max-height:calc(100dvh - var(--header-height));overflow:auto;overscroll-behavior:contain;animation:panel-arrive .28s var(--ease)}
.search-label{font-size:12px;font-weight:400;color:var(--secondary);margin:0 0 18px;line-height:1.5}
.navigation-backdrop{position:fixed;inset:var(--header-height) 0 0;z-index:40;background:rgba(23,46,72,.12);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);animation:backdrop-arrive .25s ease;cursor:default}
.navigation-locked{overflow:hidden}
.search-inner{max-width:1000px;padding-block:36px 26px}
.search-field{display:flex;align-items:center;gap:18px;width:100%}
.search-field>svg{width:28px;height:28px;flex-shrink:0;color:var(--secondary)}
.search-field input{flex:1;min-width:0;font:600 31px/1.5 var(--font);letter-spacing:-.035em;color:var(--ink);background:transparent;border:0;outline:none;padding:8px 0;border-radius:0}
.search-field input::placeholder{color:#86868b;opacity:1}
.search-field input::-webkit-search-cancel-button{-webkit-appearance:none}
.search-field:focus-within{box-shadow:0 1px 0 #d2d2d7}
.search-clear{width:28px;height:28px;background:#e8e8ed;border-radius:50%;padding:6px}
.search-dismiss{font-size:12px;border:0;background:transparent;color:var(--secondary);padding:9px 0 9px 12px;flex-shrink:0}
.search-dismiss:hover{color:var(--ink)}
.search-content{padding:32px 0 22px;min-height:245px}
.search-suggestions{display:grid;gap:14px;justify-items:start}
.search-suggestions a{display:flex;align-items:center;gap:15px;font-size:14px;font-weight:500;line-height:1.6}
.search-suggestions a span{color:var(--quiet);font-size:18px;font-weight:400}
.search-suggestions a:hover{color:var(--accent)}
.search-results{display:grid;grid-template-columns:1fr 1fr;column-gap:42px;row-gap:3px;max-height:min(49dvh,490px);overflow:auto;overscroll-behavior:contain;padding:0 5px 4px}
.search-result{position:relative;padding:16px 25px 20px 0;border-bottom:1px solid #e5e5ea;min-width:0}
.search-kind{display:block;color:var(--quiet);font-size:10px;margin-bottom:7px}
.search-result strong{display:block;font-size:17px;font-weight:600;letter-spacing:-.02em;line-height:1.5}
.search-result p{font-size:12px;color:var(--secondary);margin-top:7px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.search-arrow{position:absolute;right:3px;top:45px;color:var(--quiet);font-size:18px}
.search-result:hover strong,.search-result:hover .search-arrow{color:var(--accent)}
.search-empty{color:var(--secondary);font-size:15px;padding:18px 0 36px;max-width:540px;line-height:1.8}
.search-hint{display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--quiet);font-size:10px;padding-top:16px;border-top:1px solid var(--line)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.is-translating,.is-translating body{scroll-behavior:auto!important;overflow-anchor:none!important}
.is-translating *{animation:none!important;transition:none!important}
@keyframes panel-arrive{from{opacity:.35;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
@keyframes backdrop-arrive{from{opacity:0}to{opacity:1}}
@media(min-width:801px) and (max-width:1050px){.main-nav{gap:22px}.header-inner{gap:22px}}
@media(max-width:800px){
  .header-inner{gap:10px}.brand-name,html[lang=en] .brand-name{font-size:14px}.header-actions{gap:7px}
  .menu-toggle{display:inline-flex}.main-nav{inset:var(--header-height) 0 auto;padding:14px 32px 20px;background:#fafafc;border:0;gap:0!important;animation:panel-arrive .25s var(--ease)}
  .main-nav .nav-link{font-size:17px;font-weight:500;padding:13px 0;min-height:48px}
  .nav-item{display:block}.nav-preview{display:none!important}
  .search-inner{padding-block:20px 24px}.search-field{gap:12px}.search-field>svg{width:23px;height:23px}.search-field input{font-size:24px;padding:12px 0}
  .search-content{padding:26px 0 22px}.search-results{grid-template-columns:1fr;max-height:55dvh}.search-result{padding-block:15px 17px}
  .search-result strong{font-size:17px}.search-hint span{display:none}
}
@media(max-width:600px){
  .brand{gap:7px}.header-actions{gap:3px}.language-switch a{min-width:29px;padding:0 5px}.icon-button{width:30px;height:34px;padding:6px}.brand-name,html[lang=en] .brand-name{font-size:12px}
  .main-nav{padding-inline:26px}.search-field input{font-size:21px}.search-field{gap:10px}.search-field input::placeholder{font-size:18px}.search-dismiss{font-size:11px;padding-left:4px}
}
@media(prefers-reduced-motion:reduce){.header-panel,.navigation-backdrop,.nav-preview{animation:none}}
@media print{.navigation-backdrop,.header-panel{display:none!important}}

.topic-directory{padding:56px 0 80px}
@media(max-width:600px){.topic-directory{padding:32px 0 56px}}

/* Stable topic tints shared by the home cards and the topic directory. */
:is(.topic-card,.spotlight-slide)[data-topic-theme="formalization"]{--topic-tint:#e9f0fa}
:is(.topic-card,.spotlight-slide)[data-topic-theme="math4ai"]{--topic-tint:#e6f2f7}
:is(.topic-card,.spotlight-slide)[data-topic-theme="teaching"]{--topic-tint:#f1eff9}
:is(.topic-card,.spotlight-slide)[data-topic-theme="applications"]{--topic-tint:#e9f1f4}

/* Each card shares its grid cell with an inert copy of the other language.
   Intrinsic sizing reserves the longer version at the current screen width. */
.bilingual-card{display:grid;grid-template-columns:minmax(0,1fr);min-width:0}
.bilingual-card>*{grid-area:1/1;min-width:0;align-self:stretch;overflow-wrap:anywhere}
.bilingual-card--contact{align-self:start}
.bilingual-card .button{max-width:100%;white-space:normal;text-align:center}
.bilingual-card .button .arrow{flex-shrink:0}
[data-size-copy],[data-size-copy] *{visibility:hidden!important;pointer-events:none!important;animation:none!important;transition:none!important;user-select:none}
@media print{[data-size-copy]{display:none!important}}
/* Published attachments retain the site's quiet cards and typography. */
.entry-attachments{margin-top:28px;border-top:1px solid var(--line,#dce3ed);padding-top:22px}.entry-attachments h4{margin:0 0 14px;font-size:16px}.entry-attachments ul{padding:0;margin:0;list-style:none}.entry-attachments li{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:16px 0;border-bottom:1px solid var(--line,#dce3ed)}.entry-attachments li:last-child{border-bottom:0}.entry-attachments li>div{min-width:0}.entry-attachments a{overflow-wrap:anywhere}.entry-attachments small{display:block;color:var(--muted,#6e7d90);font-size:12px;margin-top:6px;overflow-wrap:anywhere}.entry-attachments .attachment-download{white-space:nowrap;font-size:14px}.section-editor-text{white-space:pre-line;line-height:1.9;max-width:900px;margin-top:32px}.entry>p,.article-section>p,.home-about-copy>p,.page-hero>p{white-space:pre-line}.home-custom{min-height:60svh}.home-chapter>.wrap>.entry-attachments{margin-top:32px}
@media(max-width:580px){.entry-attachments li{align-items:flex-start;gap:12px}.entry-attachments a{font-size:15px}.section-editor-text{margin-top:22px}}