.math-page{max-width:1080px;color:var(--text);margin:0 auto;padding:2rem 1rem 3.5rem}.math-subtitle{max-width:78ch}.math-section{border-top:1px solid #b3b3c22e;padding-top:1rem}.math-item{margin:0 0 1.45rem}.math-item h2{margin:.08rem 0 .35rem;font-size:clamp(1.1rem,2.4vw,1.45rem)}.math-sheet-dropdown{background:#14141e59;border:1px solid #b3b3c23d;border-radius:10px;margin-top:.82rem;overflow:hidden}.math-sheet-dropdown summary{cursor:pointer;padding:.72rem .82rem;font-weight:600}.math-sheet-body{border-top:1px solid #b3b3c22e;padding:.74rem .82rem .82rem}.math-pdf-link{margin:.45rem 0 0}.math-pdf-link a{color:var(--accent);text-underline-offset:2px;text-decoration:underline}.math-sheet-frame-wrap{border:1px solid #b3b3c233;border-radius:8px;margin-top:.7rem;overflow:hidden}.math-sheet-frame{background:#101017;border:0;width:100%;min-height:360px}@media (max-width:520px){.math-page{padding:1rem 1rem 2.2rem}.math-subtitle{font-size:.95rem;line-height:1.55}.math-sheet-frame{min-height:300px}}