.coverage-deep{--c-bg:#171014;--c-line:#61404a;--c-ink:#fff2ef;--c-muted:#d7bbb8;--c-accent:#ffb178;display:grid;gap:1.6rem;padding-block:1rem 4rem;color:var(--c-ink)}.coverage-deep button,.coverage-deep input,.coverage-deep select{font:inherit}.cd-intro{display:grid;gap:1rem;align-items:end;padding-bottom:1.5rem;border-bottom:1px solid var(--gray-700)}.cd-intro h1{max-width:20ch;margin:.4rem 0;font-size:clamp(2rem,6vw,4.1rem);line-height:1.05;letter-spacing:-.04em;text-wrap:balance}.cd-intro p{max-width:62ch;color:var(--c-muted);line-height:1.7}.cd-intro span,.cd-lesson header>span,.cd-proof span{color:var(--accent-dark);font-size:.75rem;font-weight:800}.cd-intro button,.cd-steps button,.cd-gate button,.cd-controls button,.cd-page button,.cd-page a{min-height:44px;padding:.65rem .8rem;border:1px solid var(--c-line);border-radius:.5rem;background:transparent;color:var(--c-ink);font-weight:750;cursor:pointer}.cd-intro button[aria-pressed=true]{border-color:var(--c-accent);background:color-mix(in srgb,var(--c-accent) 12%,transparent)}.cd-steps{display:grid;grid-template-columns:repeat(10,minmax(9rem,1fr));overflow-x:auto;border-block:1px solid var(--gray-700)}.cd-steps button{min-width:9rem;border:0;border-right:1px solid var(--gray-700);border-radius:0;text-align:left}.cd-steps button[aria-current=step]{box-shadow:inset 0 -3px var(--c-accent);background:color-mix(in srgb,var(--c-accent) 10%,transparent)}.cd-steps small{display:block;color:var(--c-accent)}.cd-lesson{display:grid;gap:1rem}.cd-lesson header h2{max-width:22ch;margin:.35rem 0;font-size:clamp(1.7rem,5vw,3.2rem);letter-spacing:-.035em}.cd-lesson header p{max-width:58ch;color:var(--c-muted);line-height:1.7}.cd-stage{position:relative;min-height:340px;border:1px solid var(--c-line);border-radius:.8rem;background:var(--c-bg);overflow:hidden}.cov-view{padding:1rem}.cov-top{display:flex;justify-content:space-between;gap:.5rem;color:var(--c-muted);font-size:.75rem}.cov-stack{position:relative;height:235px;margin:1rem 2rem;border:1px dashed var(--c-line)}.cov-stack i{position:absolute;inset:35px 80px 35px 50px;border:1px solid #fff0d4;border-radius:.3rem;background:#db5f5d}.cov-stack b{position:absolute;left:10%;bottom:10%;display:grid;place-items:center;min-height:42px;background:#ffc078;color:#25130d;font-size:.75rem}.cov-view>p{color:var(--c-muted);font-size:.75rem}.cd-drawer{position:absolute;top:.75rem;right:.75rem;z-index:2}.cd-controls{position:absolute;top:3.7rem;right:.75rem;width:min(19rem,calc(100% - 1.5rem));display:grid;gap:.7rem;padding:.8rem;border:1px solid var(--c-line);border-radius:.6rem;background:#2a171d}.cd-controls input[type=range],.cd-controls select{width:100%;min-height:38px}.cd-controls small{color:var(--c-muted)}.cd-controls>div{display:flex;gap:.4rem}.cd-controls>div>*{flex:1}.cd-gate,.cd-proof,.cd-explain{display:grid;gap:.75rem;padding:1rem;border-block:1px solid var(--gray-700);background:var(--gray-900)}.cd-gate p,.cd-proof p,.cd-explain p{max-width:68ch;color:var(--c-muted);line-height:1.7}.cd-proof{border-color:var(--c-accent)}.cd-explain code{width:fit-content;max-width:100%;padding:.6rem;background:#160c10;overflow-wrap:anywhere}.cd-explain details{border-top:1px solid var(--c-line);padding-top:.7rem}.cd-explain pre{overflow:auto;padding:.75rem;background:#160c10}.cd-explain a,.cd-page a{color:var(--c-accent)}.cd-page{display:flex;justify-content:space-between;gap:.5rem}.cd-page a{display:flex;align-items:center;text-decoration:none}@media(min-width:50em){.cd-intro{grid-template-columns:1fr auto}}@media(max-width:40rem){.coverage-deep{gap:1.1rem}.cd-intro>div:last-child{display:flex;gap:.4rem}.cd-intro>div:last-child>*{flex:1}.cd-steps{grid-template-columns:repeat(10,8.4rem)}.cd-stage{min-height:285px}.cov-stack{height:180px;margin:1rem}.cd-controls{top:3.5rem}.cd-page>*{flex:1;justify-content:center;text-align:center}}.cd-intro h2{max-width:20ch;margin:.4rem 0;font-size:clamp(2rem,6vw,4.1rem);line-height:1.05;letter-spacing:-.04em;text-wrap:balance}.cd-drawer{min-height:44px;padding:.6rem .75rem;border:1px solid var(--c-line);border-radius:.5rem;color:var(--c-ink);background:#2a171d;font-weight:750;cursor:pointer}.cd-explain summary{min-height:44px;display:flex;align-items:center;cursor:pointer}