main{max-width:1160px;margin:auto;padding:0 36px}section{padding:85px 0;border-bottom:1px solid var(--line)}.grid,.level-grid{display:grid;gap:22px;margin:30px 0}.three,.level-grid{grid-template-columns:repeat(3,1fr)}.two{grid-template-columns:repeat(2,1fr)}article{border-radius:18px;background:var(--wash);padding:27px;min-width:0}article h3{margin:18px 0}article p{font-size:15px;line-height:1.85}article h4{font-size:19px}.tag{display:inline-block;color:var(--accent);font-size:11px;font-weight:700;letter-spacing:.035em}.note{background:var(--wash);border-radius:15px;padding:24px 28px;margin:28px 0}.note p{margin:8px 0}.note.interpretation{border-left:3px solid #b3c8e3}.note h3{margin-top:0}.legend{display:flex;flex-wrap:wrap;gap:9px 23px;font-size:11px;color:var(--muted);margin:28px 0}.level{font-size:44px;line-height:1;font-weight:700;color:var(--accent)}.level-grid article>b{font-size:13px}.ref{font-size:12px;margin-left:5px}.equation{max-width:100%;overflow-x:auto;padding:14px 20px;background:var(--wash);border-radius:12px;margin:24px 0}