body.formula-hub,body.reference-page{background:var(--soft)}
.public-pill{display:inline-flex;align-items:center;min-height:30px;padding:0 12px;border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap}
.formula-welcome{grid-template-columns:minmax(0,1fr) minmax(220px,390px)}.formula-welcome h1{max-width:16ch}.reference-note{display:flex;align-items:flex-start;gap:18px;margin:22px 0 0;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:var(--surface);font-size:12px;line-height:1.6}.reference-note strong{color:var(--ink);white-space:nowrap}.reference-note span{color:var(--muted)}
.formula-hub .course-card p{padding-right:8px}
.formula-hub .board-index{grid-template-columns:repeat(3,minmax(0,1fr))}

.reference-main{width:min(1120px,calc(100% - 64px));margin:0 auto;padding:118px 0 100px}.reference-hero{display:grid;grid-template-columns:1fr 360px;gap:36px;align-items:end;padding-bottom:32px;border-bottom:1px solid var(--line)}.reference-hero h1{max-width:16ch;margin:0;color:var(--ink);font-size:clamp(34px,4.2vw,50px);line-height:1.04;letter-spacing:-.055em}.reference-hero>p{margin:0;color:var(--muted);font-size:15px;line-height:1.6}.sheet-nav{position:sticky;top:92px;z-index:28;display:flex;gap:8px;padding:10px 0 12px;background:var(--soft);border-bottom:1px solid var(--line);overflow-x:auto}.sheet-nav a{flex:0 0 auto;padding:9px 13px;border:1px solid var(--line);border-radius:19px;background:var(--surface);color:var(--ink-2);font-size:11px;font-weight:750}.sheet-nav a:hover{border-color:var(--accent);color:var(--ink)}
.reference-sheet{scroll-margin-top:145px;padding:70px 0 18px;border-bottom:1px solid var(--line)}.reference-sheet:last-of-type{border-bottom:0}.sheet-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:30px;margin-bottom:30px}.sheet-kicker{display:block;margin-bottom:9px;color:var(--accent);font-size:10px;font-weight:850;letter-spacing:.14em;text-transform:uppercase}.sheet-heading h2{margin:0;color:var(--ink);font-size:clamp(30px,4vw,46px);letter-spacing:-.045em}.sheet-heading p{max-width:520px;margin:12px 0 0;color:var(--muted);font-size:13px;line-height:1.65}.source-link{flex:0 0 auto;display:inline-flex;align-items:center;padding:10px 14px;border:1px solid var(--line);border-radius:20px;background:var(--surface);color:var(--ink);font-size:11px;font-weight:750}.source-link:hover{border-color:var(--accent)}
.sheet-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.data-card{min-width:0;padding:26px;border:1px solid var(--line);border-radius:11px;background:var(--surface)}.data-card.wide{grid-column:1/-1}.data-card h3{margin:0 0 18px;color:var(--ink);font-size:18px;letter-spacing:-.025em}.data-card h4{margin:24px 0 10px;color:var(--ink);font-size:13px}.data-card p,.data-card li{color:var(--muted);font-size:12px;line-height:1.65}.data-card ul{margin:0;padding-left:19px}.data-card li+li{margin-top:6px}.data-table{width:100%;border-collapse:collapse;font-size:12px}.data-table th{padding:9px 10px;border-bottom:1px solid var(--line);color:var(--muted);font-size:9px;letter-spacing:.1em;text-align:left;text-transform:uppercase}.data-table td{padding:10px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}.data-table tr:last-child td{border-bottom:0}.formula-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.formula-row{min-width:0;padding:12px 14px;border-radius:8px;background:var(--soft)}.formula-row>span{display:block;margin-bottom:5px;color:var(--muted);font-size:9px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.formula-row code,.pseudo-block{color:var(--ink);font-family:"Cascadia Code","SFMono-Regular",Consolas,monospace}.formula-row code{font-size:13px;white-space:normal}.pseudo-block{margin:0;padding:16px;border-radius:8px;background:var(--soft);font-size:12px;line-height:1.65;overflow-x:auto;white-space:pre}.mini-note{margin:0 0 16px;padding:11px 14px;border-left:3px solid var(--accent);background:var(--soft);color:var(--muted);font-size:11px;line-height:1.6}
@media(max-width:900px){.formula-welcome,.reference-hero{grid-template-columns:1fr;gap:28px}.sheet-heading{display:block}.source-link{margin-top:18px}.sheet-grid{grid-template-columns:1fr}.data-card.wide{grid-column:auto}}
@media(max-width:640px){.public-pill{display:none}.formula-hub .dashboard-main,.formula-hub .dashboard-welcome,.formula-hub .board-group,.formula-hub .course-grid,.formula-hub .course-card{min-width:0;max-width:100%}.formula-hub .course-card{width:100%}.formula-welcome h1{font-size:36px;line-height:1.04;overflow-wrap:anywhere}.formula-welcome>p{max-width:100%;overflow-wrap:anywhere}.formula-hub .board-index{grid-template-columns:1fr}.reference-main{width:calc(100% - 32px);padding-top:100px}.reference-hero{padding-bottom:24px}.reference-hero h1{font-size:36px;overflow-wrap:anywhere}.sheet-nav{top:78px}.reference-sheet{scroll-margin-top:132px;padding-top:52px}.data-card{padding:20px}.formula-list{grid-template-columns:1fr}.reference-note{display:block}.reference-note strong{display:block;margin-bottom:7px;white-space:normal}.data-table{font-size:11px}.data-table th,.data-table td{padding:8px 6px}}
.formula-row code.formula{display:block;min-height:30px;overflow-x:auto;overflow-y:hidden;background:transparent!important;border:0!important;box-shadow:none!important}.formula-row code.formula .katex-display{margin:0;text-align:left}.formula-row code.formula .katex{font-size:1.08em;white-space:nowrap}.formula-row code.formula .katex-html,.formula-row code.formula .katex-html .base{white-space:nowrap}
.reference-sheet .formula-list{grid-template-columns:1fr;gap:0}.reference-sheet .formula-row{display:grid;grid-template-columns:minmax(150px,.8fr) minmax(0,1.2fr);align-items:center;gap:18px;padding:14px 0;border-radius:0;border-bottom:1px solid var(--line);background:transparent}.reference-sheet .formula-row:last-child{border-bottom:0}.reference-sheet .formula-row>span{margin:0}.reference-sheet .formula-row code.formula{min-height:0;padding:2px 0;border:0;border-radius:0;background:transparent;box-shadow:none}.reference-sheet .formula-row code.formula .katex-display{text-align:right}
.periodic-reference{margin-top:26px}.periodic-reference h3{margin:34px 0 12px;color:var(--ink);font-size:17px;letter-spacing:-.02em}.periodic-reference h3:first-child{margin-top:0}.periodic-lines{background:transparent}.periodic-lines td:first-child,.periodic-lines th:first-child{width:118px;font-weight:760;color:var(--ink)}.periodic-lines td:nth-child(2){line-height:1.7}
.periodic-reference>.periodic-lines,.periodic-reference>h3{display:none}
.periodic-embed-frame{display:block;width:100%;height:820px;border:1px solid var(--line);border-radius:12px;background:#10131b}
.periodic-embed-note{margin:12px 0 0;color:var(--muted);font-size:11px;line-height:1.6}
@media(max-width:640px){.reference-sheet .formula-row{grid-template-columns:1fr;gap:7px;padding:13px 0}.reference-sheet .formula-row code.formula .katex-display{text-align:left}}
@media(max-width:640px){.periodic-embed-frame{height:720px;border-radius:9px}}