/* Mathematics uses its own locally hosted fonts; values and code stay monospace. */
:root{font-size:100%}
.formula,.lesson-math{font-family:inherit;font-size:1rem;line-height:1.8;letter-spacing:normal;overflow-wrap:normal;min-width:0;max-width:100%}
.lesson-math{padding:1rem 1.125rem;margin:1.25rem 0 1.5rem;background:var(--surface);border-radius:5px}
.math-row{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:.3rem .125rem;scrollbar-width:thin;overscroll-behavior-x:contain}
.math-row+.math-row{margin-top:.35rem}
.math-row .katex-display{margin:.2em 0;text-align:left}
.math-row .katex-display>.katex{text-align:left}
.katex{font-size:1.12em;line-height:1.3;text-indent:0}
.math-inline{white-space:nowrap;display:inline-block;text-indent:0;max-width:100%;vertical-align:baseline}
.math-inline .katex{font-size:1.06em}
.math-key{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;font-size:.875rem;color:var(--muted);margin:.75rem 0 0;line-height:1.8}
.math-key span{white-space:nowrap}
.calculus-library .side-note .formula{font-size:.9375rem;padding:.5rem 0}
.calculus-library .side-note .math-row{padding:.25rem 0}
.lesson-panel{font-size:1rem;line-height:1.95;max-width:72ch}
.lesson-panel h3{font-size:1.25rem;line-height:1.6}
.lesson-panel h4{font-size:1rem;line-height:1.8}
.lesson-panel table{font-size:.9375rem;line-height:1.9}
.lesson-panel th,.lesson-panel td{overflow-wrap:normal}
.lesson-orientation p:first-child{font-size:1rem}
.lesson-orientation p+p{font-size:.875rem}
.geometry-explanation .formula,.connection .formula{font-size:1rem}
.function-bar .math-inline{font-size:1rem;color:var(--ink)}
@media(max-width:700px){
 .lesson-panel{font-size:1rem;line-height:1.9}
 .lesson-panel h3{font-size:1.1875rem}
 .lesson-panel h4{font-size:1rem}
 .lesson-orientation p:first-child{font-size:1rem}
 .lesson-orientation p+p{font-size:.875rem}
 .lesson-math{padding:.875rem .75rem;margin:1rem 0 1.25rem;font-size:1rem}
 .lesson-panel table{font-size:.875rem;min-width:28rem;table-layout:auto}
 .lesson-table-wrap{overscroll-behavior-x:contain;scrollbar-width:thin}
 .lesson-table-wrap::before{content:"表格可左右滑动 →";display:block;position:sticky;left:0;width:max-content;padding:.5rem .375rem;font-size:.8125rem;color:var(--muted)}
 .math-key{font-size:.8125rem;gap:.375rem .875rem}
 .geometry-explanation .formula,.connection .formula{font-size:1rem}
}