.chess-board[data-astro-cid-cymbkd26]{--sq-dark:#0b2a5b;--sq-light:#123a7a;--gold:#f2a516;--cap:var(--cell-max);--n:6;--cell:min(var(--cap), round(down, calc((100vw - 2.5rem) / var(--n)), 1px));--w:calc(var(--cell) * var(--n));--pw:var(--kw);--ph:var(--kh);--shh:12px;--drop:39px;--s:round(down, calc(var(--cell) / 4), 1px);width:var(--w);height:var(--w);max-width:100%;image-rendering:pixelated;position:relative}@media (width<=520px){.chess-board[data-astro-cid-cymbkd26]{--cap:51px;--pw:var(--mw);--ph:var(--mh);--shh:8px;--drop:26px}}.sqs[data-astro-cid-cymbkd26]{grid-template-columns:repeat(var(--n), var(--cell));grid-auto-rows:var(--cell);clip-path:polygon(0 calc(var(--s) * 2), var(--s) calc(var(--s) * 2), var(--s) var(--s), calc(var(--s) * 2) var(--s), calc(var(--s) * 2) 0, calc(100% - var(--s) * 2) 0, calc(100% - var(--s) * 2) var(--s), calc(100% - var(--s)) var(--s), calc(100% - var(--s)) calc(var(--s) * 2), 100% calc(var(--s) * 2), 100% calc(100% - var(--s) * 2), calc(100% - var(--s)) calc(100% - var(--s) * 2), calc(100% - var(--s)) calc(100% - var(--s)), calc(100% - var(--s) * 2) calc(100% - var(--s)), calc(100% - var(--s) * 2) 100%, calc(var(--s) * 2) 100%, calc(var(--s) * 2) calc(100% - var(--s)), var(--s) calc(100% - var(--s)), var(--s) calc(100% - var(--s) * 2), 0 calc(100% - var(--s) * 2));display:grid;position:absolute;inset:0}.sq[data-astro-cid-cymbkd26]{display:block;position:relative}.sq-dark[data-astro-cid-cymbkd26]{background:var(--sq-dark)}.sq-light[data-astro-cid-cymbkd26]{background:var(--sq-light)}.glow[data-astro-cid-cymbkd26]{left:50%;top:calc(var(--cell) * (var(--base) + 1) - var(--ph) / 2 + var(--drop));width:calc(var(--w) * 1.5);aspect-ratio:1;background:radial-gradient(closest-side, color-mix(in srgb, var(--gold) 28%, transparent), color-mix(in srgb, var(--gold) 14%, transparent) 45%, transparent);mix-blend-mode:screen;pointer-events:none;position:absolute;transform:translate(-50%,-50%)}.knight[data-astro-cid-cymbkd26]{z-index:1;left:round(down, calc((var(--w) - var(--pw)) / 2), 1px);top:calc(var(--cell) * (var(--base) + 1) - var(--ph) + var(--drop));width:var(--pw);height:var(--ph);pointer-events:none;display:block;position:absolute}.shadow[data-astro-cid-cymbkd26]{width:round(down, calc(var(--pw) * .6), 2px);height:var(--shh);left:calc((var(--w) - round(down, calc(var(--pw) * .6), 2px)) / 2);top:calc(var(--cell) * (var(--base) + 1) - var(--shh) - 2px + var(--drop));background:radial-gradient(ellipse closest-side, color-mix(in srgb, var(--midnight) 35%, transparent), transparent);pointer-events:none;position:absolute}.knight[data-astro-cid-cymbkd26] img[data-astro-cid-cymbkd26]{max-width:none;width:var(--pw);height:var(--ph);image-rendering:pixelated;display:block}.sq[data-astro-cid-cymbkd26]:after{content:"";background:var(--gold);opacity:0;pointer-events:none;position:absolute;inset:0}.board-wave[data-astro-cid-cymbkd26] .sq[data-astro-cid-cymbkd26]:after{animation:.4s steps(4,end) both sq-flash;animation-delay:calc((var(--r) + var(--c)) * 36ms + 40ms)}.board-wave[data-astro-cid-cymbkd26] .knight[data-astro-cid-cymbkd26]{animation:.48s step-end .4s both knight-drop}.board-wave[data-astro-cid-cymbkd26] .glow[data-astro-cid-cymbkd26]{animation:.42s steps(5,end) .88s both glow-in,6s ease-in-out 1.3s infinite alternate glow-breathe;animation-play-state:running, var(--ps,running)}@keyframes knight-drop{0%{opacity:0;transform:translateY(-36px)}25%{opacity:1;transform:translateY(-36px)}50%{transform:translateY(0)}70%{transform:translateY(-8px)}85%,to{transform:translateY(0)}}@keyframes glow-in{0%{opacity:0}to{opacity:1}}@keyframes glow-breathe{0%{opacity:1}to{opacity:.85}}@keyframes sq-flash{0%{opacity:0}35%{opacity:.85}to{opacity:0}}@media (prefers-reduced-motion:no-preference){.board-wave[data-astro-cid-cymbkd26] .shadow[data-astro-cid-cymbkd26]{animation:.3s steps(3,end) .88s both shadow-in}}@keyframes shadow-in{0%{opacity:0}to{opacity:1}}@media (prefers-reduced-motion:reduce){.board-wave[data-astro-cid-cymbkd26] .sq[data-astro-cid-cymbkd26]:after,.board-wave[data-astro-cid-cymbkd26] .knight[data-astro-cid-cymbkd26],.board-wave[data-astro-cid-cymbkd26] .glow[data-astro-cid-cymbkd26]{animation:none}.board-wave[data-astro-cid-cymbkd26] .sq[data-astro-cid-cymbkd26]:after{opacity:0}}.checker-corner[data-astro-cid-jk27ttnv]{grid-template-columns:repeat(3, var(--cell));grid-auto-rows:var(--cell);width:calc(var(--cell) * 3);height:calc(var(--cell) * 3);display:grid}.checker-corner[data-astro-cid-jk27ttnv] span[data-astro-cid-jk27ttnv]{display:block}.dark[data-astro-cid-jk27ttnv]{background:#0b2a5b}.mid[data-astro-cid-jk27ttnv]{background:#123a7a}.gold[data-astro-cid-jk27ttnv]{background:#f2a516}@media (prefers-reduced-motion:no-preference){.gold[data-astro-cid-jk27ttnv]{animation:twinkle 3.5s steps(1, end) var(--tw,0s) infinite;animation-play-state:var(--ps,running)}}@keyframes twinkle{0%,to{opacity:1}70%{opacity:.4}80%{opacity:1}}html:not(.js) .cal-load-btn{display:none}.book{background:var(--panel-edge);border:1px solid #0000;flex-direction:column;align-items:flex-start;gap:1.25rem;padding:2rem 1.5rem;display:flex;position:relative}.book .corner{position:absolute;top:0;right:0}.book h2{text-wrap:balance;max-width:30ch;font-size:clamp(2rem,4vw,3rem)}.book .copy{max-width:62ch;color:var(--text)}.book .copy a,.book .actions a{color:#ffd24e}.book .actions{flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;display:flex}.book .status{color:var(--text-2);font-size:1rem}.book .status:empty{display:none}#cal-inline{background:var(--midnight);width:100%;overflow:auto}#cal-inline.cal-open{min-height:24rem}.book .corner{--tw:1.7s}@media (prefers-reduced-motion:no-preference){.book .piece{animation:6s step-end 3s infinite pawn-nod;animation-play-state:var(--ps,running)}}@keyframes pawn-nod{0%,to{transform:translateY(0)}4%{transform:translateY(2px)}10%{transform:translateY(0)}}@media (width>=900px){.book{padding:3rem}}.icon[data-astro-cid-ccg5yoga]{flex:none;display:block}section[data-astro-cid-lcdefpme]{scroll-margin-top:80px}.sub[data-astro-cid-lcdefpme]{color:var(--text-2);max-width:62ch}.hero[data-astro-cid-lcdefpme]{background:radial-gradient(ellipse 80% 45% at 50% 78%, color-mix(in srgb, var(--ink-mid) 50%, transparent), transparent 70%);padding-block:2.5rem 4rem;overflow-x:clip}.hero-grid[data-astro-cid-lcdefpme]{align-items:center;gap:2.5rem;display:grid}.hero-copy[data-astro-cid-lcdefpme]{flex-direction:column;align-items:flex-start;gap:1.5rem;display:flex}h1[data-astro-cid-lcdefpme]{font-size:clamp(2.5rem,5vw,4.5rem)}.lede[data-astro-cid-lcdefpme]{max-width:52ch;color:var(--text-2);font-size:1.1875rem}.hero-board[data-astro-cid-lcdefpme]{justify-self:center;max-width:100%}@media (width>=1100px){.hero[data-astro-cid-lcdefpme]{background:radial-gradient(ellipse 50% 90% at 80% 48%, color-mix(in srgb, var(--ink-mid) 55%, transparent), transparent 72%);padding-block:4rem}.hero-grid[data-astro-cid-lcdefpme]{grid-template-columns:minmax(0,58fr) minmax(0,38fr);gap:4%}.hero-board[data-astro-cid-lcdefpme]{justify-self:end}}.problem[data-astro-cid-lcdefpme]{padding-block:4rem 2rem}.measure[data-astro-cid-lcdefpme]{flex-direction:column;gap:1.5rem;max-width:54ch;display:flex}.measure[data-astro-cid-lcdefpme] h2[data-astro-cid-lcdefpme]{font-size:clamp(2rem,4vw,3rem)}.measure[data-astro-cid-lcdefpme] p[data-astro-cid-lcdefpme]{font-size:1.375rem;line-height:1.5}.problem-grid[data-astro-cid-lcdefpme]{align-items:start;gap:2.5rem;display:grid}.pull[data-astro-cid-lcdefpme]{background:var(--panel-edge);border:1px solid #0000;margin:0;padding:2.5rem 1.5rem 2rem;position:relative}.pull[data-astro-cid-lcdefpme] .pull-corner{position:absolute;top:0;right:0}.pull[data-astro-cid-lcdefpme] p[data-astro-cid-lcdefpme]{font-family:var(--font-pixel);color:var(--gold);font-size:2rem;font-weight:600;line-height:1.25}@media (width>=900px){.problem-grid[data-astro-cid-lcdefpme]{grid-template-columns:minmax(0,54ch) minmax(0,1fr);gap:4rem}.pull[data-astro-cid-lcdefpme]{margin-top:4.5rem;padding:3rem 2.5rem 2.5rem}}.what[data-astro-cid-lcdefpme]{padding-block:2rem 4rem}.what[data-astro-cid-lcdefpme] h2[data-astro-cid-lcdefpme]{font-size:clamp(2rem,4vw,3rem)}.what[data-astro-cid-lcdefpme] .sub[data-astro-cid-lcdefpme]{margin-top:1rem}.terms[data-astro-cid-lcdefpme]{gap:1.5rem;margin-top:2.5rem;display:grid}.term[data-astro-cid-lcdefpme]{flex-direction:column;gap:.75rem;display:flex}.term[data-astro-cid-lcdefpme] h3[data-astro-cid-lcdefpme]{color:var(--text);font-size:1.375rem}.term[data-astro-cid-lcdefpme] p[data-astro-cid-lcdefpme]{color:var(--text-2);max-width:52ch;font-size:1.0625rem;line-height:1.6}@media (prefers-reduced-motion:no-preference){.term[data-astro-cid-lcdefpme] .icon{animation:5s step-end infinite icon-bob;animation-play-state:var(--ps,running)}.term[data-astro-cid-lcdefpme]:first-child .icon{animation-delay:1s}.term[data-astro-cid-lcdefpme]:nth-child(3) .icon{animation-delay:2.6s}.term[data-astro-cid-lcdefpme]:nth-child(5) .icon{animation-delay:4.2s}}@keyframes icon-bob{0%,to{transform:translateY(0)}3%{transform:translateY(-3px)}7%{transform:translateY(0)}}.sep[data-astro-cid-lcdefpme]{--sq:var(--ink-mid);background-image:repeating-linear-gradient(90deg, var(--sq) 0 8px, var(--ink) 8px 16px);height:8px;display:block}@media (hover:hover){.term[data-astro-cid-lcdefpme]:hover+.sep[data-astro-cid-lcdefpme],.sep[data-astro-cid-lcdefpme]:has(+.term:hover){--sq:var(--gold)}}@media (width>=900px){.terms[data-astro-cid-lcdefpme]{grid-template-columns:1fr 8px 1fr 8px 1fr;align-items:stretch;gap:2rem}.sep[data-astro-cid-lcdefpme]{background-image:repeating-linear-gradient(180deg, var(--sq) 0 8px, var(--ink) 8px 16px);width:8px;height:auto}}.book-section[data-astro-cid-lcdefpme]{padding-block:4rem 5rem}