:root{color-scheme:light dark;--bg:#f2f5f1;--paper:#fff;--soft:#f7faf7;--ink:#18221b;--muted:#627067;--line:#d5ddd6;--green:#1e7041;--green2:#145832;--green-soft:#e2f2e7;--gold:#9b6818;--gold-soft:#fff3d6;--code:#edf3ee;--shadow:0 16px 48px rgba(27,47,34,.10);--site-surface:var(--paper);--site-soft:var(--soft);--site-text:var(--ink);--site-muted:var(--muted);--site-border:var(--line);--site-accent:var(--green);--site-accent-strong:var(--green2)}
:root[data-theme="dark"]{color-scheme:dark;--bg:#0e1410;--paper:#151d18;--soft:#19231c;--ink:#edf5ef;--muted:#a5b3a9;--line:#334139;--green:#69c187;--green2:#8bd4a2;--green-soft:#1e3928;--gold:#e1b15e;--gold-soft:#352b18;--code:#1d2921;--shadow:0 18px 54px rgba(0,0,0,.28)}
:root[data-theme="light"]{color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.68 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:var(--green2);text-underline-offset:3px}.topbar{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(12px)}.bar{width:min(1180px,calc(100% - 28px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 0}.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;text-decoration:none}.mark{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--green);color:#fff}.actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.button,.theme{border:1px solid var(--line);border-radius:11px;background:var(--paper);color:var(--ink);padding:7px 10px;text-decoration:none}.theme{padding:4px 7px 4px 10px}.theme select{border:0;background:transparent;color:inherit;padding:4px 16px 4px 4px}.version{color:var(--muted);font-size:.82rem;font-weight:750}.hero{width:min(1180px,calc(100% - 28px));margin:auto;padding:60px 0 28px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:34px;align-items:center}.eyebrow{margin:0 0 8px;color:var(--green2);font-size:.78rem;font-weight:850;letter-spacing:.12em;text-transform:uppercase}h1{font-size:clamp(2.35rem,6vw,4.7rem);line-height:1.02;letter-spacing:-.045em;margin:0}.deck{max-width:760px;color:var(--muted);font-size:clamp(1.05rem,2vw,1.25rem)}.challenge{border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,var(--green-soft),var(--paper));padding:24px;box-shadow:var(--shadow)}.challenge small{color:var(--muted);font-weight:800;text-transform:uppercase;letter-spacing:.08em}.big{font-size:4.2rem;font-weight:900;line-height:1;margin:12px 0 8px;color:var(--green2)}.layout{width:min(1180px,calc(100% - 28px));margin:0 auto 70px;display:grid;grid-template-columns:255px minmax(0,1fr);gap:28px;align-items:start}.toc{position:sticky;top:74px;max-height:calc(100vh - 94px);overflow:auto;border:1px solid var(--line);border-radius:16px;background:var(--paper);padding:15px;box-shadow:var(--shadow)}.toc h2{font-size:1rem;margin:0 0 8px}.toc ol{list-style:none;padding:0;margin:0}.toc a{display:block;padding:5px 7px;border-radius:7px;color:var(--muted);text-decoration:none;line-height:1.3}.toc a:hover{background:var(--green-soft);color:var(--green2)}article{min-width:0;border:1px solid var(--line);border-radius:22px;background:var(--paper);padding:clamp(22px,5vw,54px);box-shadow:var(--shadow)}article h2{margin:2.2em 0 .55em;font-size:1.7rem;line-height:1.2;border-top:1px solid var(--line);padding-top:1.15em}article h3{margin:1.55em 0 .4em}article p{margin:.75em 0}article li{margin:.3em 0}.position{margin:0 0 34px;border:1px solid var(--line);border-radius:18px;background:var(--soft);padding:16px}.position h2{border:0;padding:0;margin:0;font-size:1.35rem}.position svg{display:block;width:100%;height:auto;min-height:225px}.soil{stroke:var(--muted);stroke-width:5;stroke-linecap:round}.branch{stroke:var(--green);stroke-width:8;stroke-linecap:round}.joint{fill:var(--green)}.label{fill:var(--ink);font-weight:750;font-size:15px;text-anchor:middle}.bowl{fill:var(--green-soft);stroke:var(--muted);stroke-width:3}.rim{fill:var(--paper);stroke:var(--muted);stroke-width:3}.unknown{fill:var(--green2);font-size:46px;font-weight:900;text-anchor:middle}.warning{margin:40px 0 12px;border:2px solid var(--gold);border-radius:18px;background:var(--gold-soft);padding:22px 24px}.warning h2{margin:0 0 .4em;border:0;padding:0}.warning .eyebrow{color:var(--gold)}blockquote{margin:20px 0;border-left:5px solid var(--green);border-radius:0 12px 12px 0;background:var(--green-soft);padding:12px 16px}blockquote p{margin:0}code{background:var(--code);border:1px solid var(--line);border-radius:6px;padding:.12em .36em;font-size:.9em}pre{overflow:auto;background:#111914;color:#e8f2eb;border-radius:13px;padding:16px;border:1px solid var(--line);line-height:1.45}pre code{border:0;background:transparent;padding:0;color:inherit}table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.94rem}th,td{padding:10px 11px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}th{background:var(--soft);color:var(--muted);font-size:.8rem;text-transform:uppercase}.formula{overflow:auto;margin:16px 0;border:1px solid var(--line);border-radius:12px;background:var(--soft);padding:13px 16px;text-align:center;font:700 1.03rem/1.5 ui-monospace,monospace;color:var(--green2)}.math{font-family:ui-monospace,monospace;color:var(--green2);font-weight:650}.loading,.error{border:1px solid var(--line);border-radius:12px;background:var(--soft);padding:18px}.error{border-color:#a9463d}footer{width:min(1180px,calc(100% - 28px));margin:0 auto 36px;text-align:center;color:var(--muted);font-size:.9rem}@media(max-width:900px){.hero-grid,.layout{grid-template-columns:1fr}.toc{position:relative;top:auto;max-height:none}}@media(max-width:600px){.button{display:none}.hero{padding-top:40px}article{padding:20px}table{display:block;overflow:auto}}@media print{.site-header,.toc,.actions{display:none!important}body{background:#fff;color:#000}.hero,.layout,footer{width:100%;margin:0}.hero{padding:0 0 18px}article{border:0;box-shadow:none;padding:0}}

.site-header{position:sticky;top:0;z-index:60;border-bottom:1px solid var(--site-border);background:color-mix(in srgb,var(--site-surface) 92%,transparent);backdrop-filter:blur(12px)}
.site-bar{width:min(1180px,calc(100% - 24px));margin:0 auto;min-height:58px;display:flex;align-items:center;gap:10px;padding:8px 0}
.site-brand{display:inline-flex;align-items:center;gap:9px;margin-right:auto;color:var(--site-text);font-weight:800;text-decoration:none;white-space:nowrap}
.site-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--site-accent);color:white}
.site-nav{display:flex;align-items:center;flex-wrap:wrap;gap:4px}.site-link{border-radius:9px;padding:7px 9px;color:var(--site-muted);font-size:.88rem;font-weight:700;text-decoration:none}.site-link:hover{background:var(--site-soft);color:var(--site-text)}.site-link.active{background:var(--site-accent);color:white}.site-version{color:var(--site-muted);font-size:.8rem;font-weight:750;white-space:nowrap}
.site-theme{display:flex;align-items:center;gap:6px;border:1px solid var(--site-border);border-radius:10px;background:var(--site-surface);padding:3px 5px 3px 8px;white-space:nowrap}.site-theme>span{margin:0;color:var(--site-muted);font-size:.8rem;font-weight:700}.site-theme select{width:auto;border:0;background:transparent;color:var(--site-text);padding:4px 18px 4px 3px}
.site-footer{width:min(1180px,calc(100% - 24px));margin:0 auto 34px;padding:18px 8px 0;border-top:1px solid var(--site-border);display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px 14px;color:var(--site-muted);text-align:center;font-size:.88rem}.site-footer nav{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 12px}.site-footer a{color:var(--site-accent-strong);font-weight:700;text-decoration:none}.site-footer a:hover{text-decoration:underline}
@media(max-width:860px){.site-bar{flex-wrap:wrap}.site-nav{order:3;width:100%}}@media(max-width:560px){.site-brand span:last-child{font-size:.92rem}.site-version{display:none}.site-link{padding:6px 7px;font-size:.82rem}.site-theme>span{display:none}}