/* English + math editorial system; existing academy manuscript styles stay intact. */
.site-shell{overflow:clip}
.em-header{position:sticky;top:0;z-index:60;background:#faf6eff5;border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
.em-nav{max-width:1120px;margin:auto;min-height:72px;padding:10px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.em-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;white-space:nowrap}.em-brand span{display:grid;place-items:center;width:37px;height:37px;border-radius:11px;background:var(--clay-deep);color:#fff;font-size:18px}
.em-menu{display:flex;gap:5px;align-items:center}.em-menu a{padding:11px 13px;min-height:44px;font-size:15px;font-weight:650;border-radius:9px}.em-menu a:hover,.em-menu a[aria-current]{background:var(--cream-deep);color:var(--clay-deep)}
.em-mobile{display:none;position:relative}.em-mobile summary{cursor:pointer;padding:10px 16px;border:1px solid #d8c9bd;border-radius:10px;min-height:44px;font-weight:700;list-style:none}.em-mobile summary::-webkit-details-marker{display:none}.em-mobile summary:after{content:'＋';margin-left:12px}.em-mobile[open] summary:after{content:'−'}
.em-skip{position:fixed;top:-100px;left:12px;z-index:100;background:#fff;color:#34271f;padding:12px}.em-skip:focus{top:8px}
.em-page .site-shell{overflow:visible}.em-main{width:min(1080px,calc(100% - 40px));margin:auto;padding-bottom:60px;font-size:17px;line-height:1.85;overflow-wrap:anywhere}
.em-main h1{font-size:clamp(30px,4.6vw,48px);line-height:1.32;letter-spacing:-.035em;max-width:20ch}.em-main h2{font-size:clamp(24px,3vw,32px);line-height:1.4;letter-spacing:-.025em;max-width:30ch;margin:0 0 22px}.em-main h3{font-size:19px;line-height:1.5;margin:0 0 10px}.em-main p+p{margin-top:16px}.em-main p{max-width:76ch}
.em-hero{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:48px;padding:54px 0 48px}.em-hero.em-solo{grid-template-columns:1fr;padding-bottom:26px}.em-kicker{font-size:13px;font-weight:800;letter-spacing:.08em;color:var(--clay-deep);margin-bottom:14px!important}.em-lead{font-size:18px;color:#5b5048;line-height:1.9;margin:22px 0 0;max-width:50ch!important}.em-hero figure{margin:0;background:#fceddf;border-radius:24px;padding:20px}.em-hero img{width:100%;height:auto}
.em-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:23px}.em-links a,.em-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 18px;border:1px solid #d8c9bd;border-radius:10px;background:white;font:inherit;font-size:16px;font-weight:700;line-height:1.5;text-align:center;color:#77402c;cursor:pointer}.em-links a:first-child,.em-button{background:var(--clay-deep);color:#fff;border-color:var(--clay-deep)}.em-links a:hover,.em-button:hover{box-shadow:0 4px 14px #35271915}
.em-section{padding:40px 0;border-top:1px solid #decfc2;scroll-margin-top:96px}.em-section.em-panel{background:white;border:1px solid var(--line);border-radius:20px;padding:30px;margin:24px 0}.em-split{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}.em-figure{margin:0;min-width:0}.em-figure img{width:100%;height:auto;border-radius:12px}.em-figure figcaption{font-size:14px;color:#67594e;line-height:1.7;margin-top:12px}
.em-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.em-grid.em-two{grid-template-columns:repeat(2,minmax(0,1fr))}.em-card{padding:24px;background:white;border:1px solid var(--line);border-radius:16px;min-width:0}.em-card p{font-size:16px;line-height:1.85}.em-card h3{color:#783d26}.em-card .em-label{font-size:13px;font-weight:700;color:#755647;margin-bottom:8px}
.em-steps{padding:0;list-style:none;display:grid;gap:14px;counter-reset:step}.em-steps>li{position:relative;padding:20px 24px 20px 64px;border:1px solid var(--line);border-radius:14px;background:white;counter-increment:step}.em-steps>li:before{content:counter(step,decimal-leading-zero);position:absolute;left:20px;top:23px;color:#a04827;font-weight:800;font-size:15px}.em-steps strong{display:block;margin-bottom:8px}.em-note{font-size:14px;line-height:1.8;color:#685950;margin-top:18px!important}.em-answer{border-left:3px solid var(--clay);background:#f2e7dc;padding:18px 20px;margin:20px 0;border-radius:0 12px 12px 0}.em-example{background:#fff;border:1px solid #cbbbad;border-radius:14px;padding:24px;margin-top:18px}.em-example strong{display:block;margin-bottom:8px}
.em-toc{display:flex;flex-wrap:wrap;gap:8px;padding:18px 0 24px}.em-toc a{background:#eee1d3;padding:10px 14px;border-radius:8px;font-size:15px;min-height:44px}.em-faq{padding:12px 0;border-bottom:1px solid var(--line)}.em-faq summary{cursor:pointer;font-weight:700;min-height:48px;line-height:1.6;padding:10px 0}.em-faq p{margin:8px 0 16px;color:#5b5048}
.em-video{padding:0;overflow:hidden}.em-video img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}.em-video-body{padding:22px}.em-video .em-button{margin-top:16px;width:100%}.em-video a{display:block;margin-top:12px;font-size:14px;text-decoration:underline;min-height:28px}.em-player{margin:20px 0}.em-player iframe{width:100%;aspect-ratio:16/9;border:0;display:block;border-radius:12px}.em-player button{margin:12px 0}.em-player[hidden]{display:none}
.em-editorial{padding:25px 0 10px;font-size:14px;line-height:1.8;color:#685950}.em-editorial a{text-decoration:underline}.em-editorial nav{display:flex;flex-wrap:wrap;gap:8px 20px}.em-footer{background:#eee2d5;color:#514239;padding:35px 20px 95px;font-size:15px;line-height:1.8}.em-footer>div{max-width:1080px;margin:auto}.em-footer nav{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:14px}.em-footer a{min-height:40px;display:inline-flex;align-items:center;text-decoration:underline}
.em-contact{position:fixed;bottom:12px;right:20px;z-index:55;display:flex;gap:7px;padding:6px;background:#fdf9f3ed;border:1px solid #dcc5b5;border-radius:14px;box-shadow:0 4px 20px #34241918}.em-contact a{display:flex;align-items:center;justify-content:center;padding:10px 15px;min-height:44px;font-size:14px;font-weight:750;background:#923c1f;color:#fff;border-radius:9px}.em-contact a:last-child{background:#423128}
.em-hub-block{max-width:1080px;width:calc(100% - 32px);margin:24px auto;font-size:17px;line-height:1.85;overflow-wrap:anywhere}.em-hub-block h2{margin-bottom:20px}.em-hub-block h3{margin-bottom:12px}.em-hub-block .em-section{scroll-margin-top:96px}
.em-existing-hub .section{width:100%;max-width:100%;margin:24px 0;padding:24px 0}.em-existing-hub .em-hub-block{width:100%;margin:0}.em-existing-hub .lead{font-size:16px;line-height:1.85}.em-existing-hub .em-hero{margin:0}.em-existing-hub .breadcrumb{display:none}
.branch-main .branch-section{scroll-margin-top:96px}.branch-main .branch-media{margin-top:28px;margin-bottom:28px}.branch-main .branch-meta{font-size:14px;color:#6a584c;margin:20px 0}.branch-facts dd a{text-decoration:underline}.branch-main .em-links{font-size:16px}.branch-main .em-lead{font-size:17px;max-width:75ch!important}.branch-main .branch-hero{padding-top:20px}.branch-main .branch-summary{font-size:17px}
.em-page :focus-visible,.em-header :focus-visible,.em-contact :focus-visible{outline:3px solid #a74720;outline-offset:4px}
[id]{scroll-margin-top:96px}
@media(max-width:850px){.em-menu{display:none}.em-mobile{display:block}.em-nav{min-height:64px;padding:8px 18px}.em-mobile>div{position:absolute;right:0;top:calc(100% + 12px);min-width:240px;max-width:calc(100vw - 36px);display:grid;grid-template-columns:1fr 1fr;background:#fff;border:1px solid #d8c9bd;padding:10px;border-radius:14px;box-shadow:0 12px 28px #24140820}.em-mobile a{font-size:15px;padding:12px 8px;min-height:48px;border-radius:8px}.em-mobile a[aria-current]{background:#f4e7db;font-weight:750}.em-hero{gap:24px}.em-grid{grid-template-columns:1fr}.em-grid.em-two{grid-template-columns:1fr 1fr}.em-card{padding:24px}.em-video{padding:0}.em-contact{left:12px;right:12px;bottom:max(8px,env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.em-contact a{padding:10px 5px}.em-section,.branch-main .branch-section,[id]{scroll-margin-top:84px}}
@media(max-width:600px){.em-main{width:calc(100% - 32px);font-size:16px;line-height:1.85}.em-hero{grid-template-columns:1fr;padding:32px 0;gap:24px}.em-main h1{font-size:31px;max-width:20ch}.em-main h2{font-size:24px}.em-main h3{font-size:18px}.em-lead{font-size:17px;margin-top:18px}.em-hero figure{max-width:430px;margin:auto;padding:12px}.em-split,.em-grid.em-two{grid-template-columns:1fr}.em-section{padding:30px 0}.em-section.em-panel{padding:22px 18px}.em-links a{flex:1 1 140px;font-size:15px;padding:12px}.em-steps>li{padding:18px 18px 18px 54px}.em-steps>li:before{left:15px;top:20px}.em-card{padding:21px}.em-video{padding:0}.em-toc{gap:7px}.em-hub-block{font-size:16px}.branch-main .branch-summary{font-size:16px}.branch-main .branch-localities{font-size:15px}.branch-main .branch-courses{grid-template-columns:1fr}.branch-main h1{font-size:28px}.em-editorial nav{display:grid;gap:10px}.em-note{font-size:14px}.em-figure figcaption{font-size:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}