:root{--bg:#fffaf0;--ink:#222;--tomato:#e4572e;--tomato-ink:#b5391a;--teal:#17bebb;--teal-ink:#0d7472;--mint:#d6f3f2;--peach:#fde4dc;--cream:#f6ecd6;--muted:#555;
--mono:ui-monospace,"SFMono-Regular","SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
--r:18px;--s1:.5rem;--s2:1rem;--s3:1.5rem;--s4:2.5rem;--s5:4rem}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:1.0625rem/1.65 var(--sans)}
img{max-width:100%;height:auto}
a{color:var(--tomato-ink);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{color:var(--ink);text-decoration-color:var(--tomato)}
:focus-visible{outline:3px solid var(--teal-ink);outline-offset:3px;border-radius:4px}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:10}
.skip:focus{left:1rem;top:1rem;color:#fff}
h1,h2,h3,.logo,.foot-logo,.kicker,.mono{font-family:var(--mono);letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.4vw,3rem);line-height:1.12;margin:.4rem 0 1rem}
h2{font-size:clamp(1.35rem,2.6vw,1.8rem);line-height:1.2;margin:2.6rem 0 .8rem}
h2::before{content:"> ";color:var(--tomato)}
h3{font-size:1.15rem;line-height:1.3;margin:1.6rem 0 .5rem}
p,ul,ol{margin:0 0 1rem}
li{margin-bottom:.35rem}
/* header */
.site-head{background:var(--ink);color:var(--bg);border-bottom:6px solid var(--tomato)}
.head-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:.8rem;padding-bottom:.8rem}
.logo{display:flex;align-items:center;gap:.6rem;color:var(--bg);text-decoration:none;font-size:1.3rem;font-weight:700}
.logo img{border-radius:10px;flex:none}
.logo b{color:var(--teal)}
.logo i{font-style:normal;color:var(--tomato);animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
@media (prefers-reduced-motion:reduce){.logo i{animation:none}}
.nav{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.3rem}
.nav li{margin:0}
.nav a{display:block;color:var(--bg);text-decoration:none;font:600 .9rem/1 var(--mono);padding:.55rem .7rem;border:2px solid transparent;border-radius:999px}
.nav a:hover{border-color:var(--teal);color:#fff}
.nav a[aria-current=page]{background:var(--teal);color:var(--ink)}
.disclose{margin:0;background:var(--peach);color:var(--ink);font-size:.88rem;padding:.5rem 0;border-top:2px solid var(--ink)}
.disclose a{color:var(--tomato-ink)}
/* main */
main{padding:1.5rem 0 4rem}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.3rem;margin:0 0 .5rem;padding:0;font:.85rem var(--mono);color:var(--muted)}
.crumbs li{margin:0}
.crumbs li+li::before{content:"/";margin-right:.3rem;color:var(--tomato)}
.meta{font:.85rem var(--mono);color:var(--muted);margin-bottom:1.5rem}
.kicker{display:inline-block;background:var(--teal);color:var(--ink);font-weight:700;font-size:.8rem;padding:.25rem .65rem;border-radius:999px;border:2px solid var(--ink);text-transform:uppercase;letter-spacing:.06em}
.lede{font-size:1.2rem;max-width:46rem}
.prose{max-width:46rem}
.prose-wide{max-width:none}
/* hero */
.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:2rem;align-items:start;margin-top:1rem}
.answer{background:#fff;border:3px solid var(--ink);border-radius:var(--r);box-shadow:8px 8px 0 var(--tomato);overflow:hidden}
.answer-top{background:var(--ink);color:var(--teal);font:700 .85rem var(--mono);padding:.55rem 1rem;letter-spacing:.08em}
.answer-top span{color:var(--bg)}
.answer-body{padding:1.2rem 1.3rem .4rem}
.answer-body p:first-child{font:700 1.2rem/1.35 var(--mono)}
.picks{list-style:none;padding:0;margin:0 0 1rem;display:grid;gap:.4rem}
.picks li{margin:0;padding:.45rem .7rem;background:var(--mint);border-radius:10px;border:2px solid var(--ink);font-size:.95rem}
.picks b{font-family:var(--mono)}
/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:1.4rem;margin:1.2rem 0 1rem}
.card{background:#fff;border:3px solid var(--ink);border-radius:var(--r);padding:1.2rem 1.25rem;box-shadow:6px 6px 0 var(--ink)}
.card h3{margin-top:.2rem}
.card .tag{display:inline-block;font:700 .75rem var(--mono);text-transform:uppercase;letter-spacing:.06em;background:var(--peach);border:2px solid var(--ink);border-radius:999px;padding:.15rem .55rem}
.card.t{box-shadow:6px 6px 0 var(--teal)}
.card.r{box-shadow:6px 6px 0 var(--tomato)}
.card p:last-child{margin-bottom:0}
a.card{display:block;color:var(--ink);text-decoration:none;transition:transform .12s}
a.card:hover{transform:translate(-2px,-2px)}
a.card .go{font:700 .9rem var(--mono);color:var(--tomato-ink)}
/* table */
.tablewrap{overflow-x:auto;border:3px solid var(--ink);border-radius:var(--r);background:#fff;margin:1.2rem 0 1.6rem;box-shadow:6px 6px 0 var(--teal)}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.95rem}
th,td{text-align:left;vertical-align:top;padding:.7rem .85rem;border-bottom:2px solid #e9dfcb}
thead th{background:var(--ink);color:var(--bg);font:700 .85rem var(--mono);text-transform:uppercase;letter-spacing:.04em;border-bottom:none}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:none}
tbody th{font-family:var(--mono)}
tr.top{background:var(--peach)}
.rank{display:inline-grid;place-items:center;width:1.9rem;height:1.9rem;border-radius:8px;background:var(--tomato);color:var(--ink);font:800 1rem var(--mono);margin-right:.4rem;border:2px solid var(--ink)}
caption{caption-side:bottom;text-align:left;padding:.6rem .85rem;font-size:.85rem;color:var(--muted)}
/* notes */
.note{border:3px solid var(--ink);border-radius:var(--r);padding:1rem 1.2rem;margin:1.4rem 0;background:var(--mint)}
.note.warn{background:var(--peach)}
.note p:last-child{margin-bottom:0}
.note strong:first-child{font-family:var(--mono)}
/* photo */
.photo{margin:1.6rem 0;max-width:46rem}
.photo img{display:block;width:100%;border:3px solid var(--ink);border-radius:var(--r)}
.photo figcaption,.diagram figcaption{font-size:.85rem;color:var(--muted);margin-top:.5rem}
.credit{display:block}
.hero .photo{margin:0}
/* board */
.diagram{margin:1.6rem 0;max-width:360px}
.bwrap{display:grid;grid-template-columns:1.1rem 1fr;grid-template-rows:1fr 1.2rem;gap:0 .25rem}
.board{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);aspect-ratio:1;border:4px solid var(--ink);border-radius:10px;overflow:hidden;box-shadow:6px 6px 0 var(--tomato)}
.sq{min-width:0;min-height:0;position:relative}
.sq.l{background:#fbeed7}.sq.d{background:#5cb8b2}
.sq.hl{box-shadow:inset 0 0 0 4px var(--tomato)}
.sq img{width:100%;height:100%;display:block}
.ranks{display:grid;grid-template-rows:repeat(8,1fr);font:.72rem var(--mono);color:var(--muted);align-items:center;text-align:center}
.files{grid-column:2;display:grid;grid-template-columns:repeat(8,1fr);font:.72rem var(--mono);color:var(--muted);text-align:center}
.split{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:2rem;align-items:start}
.split .diagram{margin-top:.4rem}
.moves{font-family:var(--mono);background:var(--cream);padding:.1rem .35rem;border-radius:6px;white-space:nowrap}
/* faq */
.faq details{border:3px solid var(--ink);border-radius:14px;background:#fff;margin:0 0 .8rem;padding:.2rem 1rem}
.faq summary{cursor:pointer;font:700 1rem/1.4 var(--mono);padding:.6rem 0}
.faq details[open]{box-shadow:5px 5px 0 var(--teal)}
.faq details p{margin:.2rem 0 .9rem}
.btn{display:inline-block;background:var(--tomato-ink);color:#fff;font:700 .95rem var(--mono);padding:.7rem 1.1rem;border-radius:12px;border:3px solid var(--ink);text-decoration:none;box-shadow:4px 4px 0 var(--ink)}
.btn:hover{color:#fff;transform:translate(-1px,-1px)}
.big404{font:800 clamp(4rem,14vw,8rem)/1 var(--mono);color:var(--tomato);margin:0}
/* footer */
.site-foot{background:var(--ink);color:var(--bg);padding:2.5rem 0 1.5rem;border-top:6px solid var(--teal);font-size:.92rem}
.site-foot a{color:#ffd6c9}
.site-foot a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:2rem}
.foot-logo{font-size:1.25rem;font-weight:700;margin-bottom:.5rem}
.foot-logo b{color:var(--teal)}
.foot-links{list-style:none;padding:0;margin:0;columns:2;gap:1.5rem}
.foot-links li{break-inside:avoid}
.fair{background:#333;border-left:5px solid var(--tomato);padding:.7rem .9rem;border-radius:8px}
.small{font-size:.82rem;color:#d9d2c3;margin-top:1.5rem;border-top:1px solid #444;padding-top:1rem}
@media (max-width:860px){.hero,.split,.foot-grid{grid-template-columns:1fr}.split .diagram{max-width:340px}}
@media (max-width:520px){body{font-size:1rem}.wrap{padding:0 1rem}.nav a{font-size:.82rem;padding:.45rem .55rem}.foot-links{columns:1}.answer{box-shadow:5px 5px 0 var(--tomato)}}
.fen{display:block;font:.75rem var(--mono);word-break:break-all;color:var(--muted);margin-top:.2rem}
.guide{max-width:none}
.disclose .wrap{display:block}