:root{--bg:#0d0b09;--panel:#17130e;--raise:#211b13;--line:#352c1f;--line2:#4b3f2c;--text:#ebe1c9;--soft:#cdbfa2;--mute:#97896f;--accent:#d6a64f;--accent-ink:#1b1307;--accent-hi:#e8bf6f;--ok:#8bbf6a;--bad:#cf4a3e;--paper:#e7dbbd;--paper2:#d9caa5;--ink:#2a2218;--ink-soft:#4a3d2b;--serif:Georgia,"Iowan Old Style","Palatino Linotype",Palatino,"Times New Roman",serif;--type:"American Typewriter","Courier Prime","Courier New",Courier,"Liberation Mono",monospace;--sans:var(--serif);--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace}*{box-sizing:border-box}html,body{margin:0}body{background:radial-gradient(ellipse 70% 38% at 50% -6%, #d6a64f2b, transparent 70%), radial-gradient(ellipse at 50% 120%, #000000a6, transparent 60%), var(--bg);color:var(--text);font-family:var(--serif);background-attachment:fixed;min-height:100vh;font-size:16px;line-height:1.6}body:before{content:"";pointer-events:none;z-index:50;opacity:.07;mix-blend-mode:screen;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 .9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");position:fixed;inset:0}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hi);text-underline-offset:3px;text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}h1,h2,h3{font-family:var(--type);letter-spacing:.01em;margin:0;font-weight:700;line-height:1.2}h1{font-size:30px}h2{text-transform:uppercase;letter-spacing:.12em;color:var(--accent);font-size:19px}h3{font-size:16px}p{margin:0}code,.mono{font-family:var(--mono);font-size:.92em}.wrap{max-width:1000px;margin:0 auto;padding:0 20px}.bar{border-bottom:1px solid var(--line2);background:linear-gradient(#1c160e,#120e09);position:relative;box-shadow:0 6px 24px #00000080}.bar:after{content:"";background:repeating-linear-gradient(90deg,var(--accent) 0 14px,transparent 14px 22px);opacity:.35;height:3px;position:absolute;bottom:-4px;left:0;right:0}.bar .wrap{flex-wrap:wrap;align-items:center;gap:24px;min-height:62px;display:flex}.brand{color:var(--text);font-family:var(--type);letter-spacing:.16em;text-transform:uppercase;align-items:center;gap:12px;font-size:20px;font-weight:700;display:flex}.brand:hover{color:var(--accent-hi);text-decoration:none}.brand svg{width:30px;height:30px;color:var(--accent);flex:none}.brand small{letter-spacing:.3em;color:var(--mute);margin-top:1px;font-size:10px;font-weight:400;display:block}.bar nav{flex-wrap:wrap;gap:2px;margin-left:auto;display:flex}.bar nav a{color:var(--soft);font-family:var(--type);letter-spacing:.12em;text-transform:uppercase;border-bottom:2px solid #0000;border-radius:2px;padding:7px 12px;font-size:13px}.bar nav a:hover{color:var(--accent-hi);border-bottom-color:var(--line2);text-decoration:none}.bar nav a.active{color:var(--accent);border-bottom-color:var(--accent)}.foot{border-top:1px solid var(--line);color:var(--mute);font-size:13px;font-family:var(--type);margin-top:72px;padding:22px 0 30px}.foot .wrap{flex-wrap:wrap;gap:6px 24px;display:flex}.foot a{color:var(--mute);text-decoration:underline}main.wrap{padding:36px 20px 8px}.stack{flex-direction:column;gap:16px;display:flex}.row{flex-wrap:wrap;gap:16px 32px;display:flex}.muted{color:var(--mute)}.soft{color:var(--soft)}.fine{color:var(--mute);font-size:13px;line-height:1.6}.cap{color:var(--mute);font-size:12px;font-family:var(--type);letter-spacing:.1em;text-transform:uppercase}.lead{color:var(--soft);max-width:62ch;font-size:18px}.panel{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:2px;padding:14px 16px;overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px dashed var(--line2);vertical-align:top;padding:11px 12px}th{font-family:var(--type);letter-spacing:.14em;text-transform:uppercase;color:var(--accent);border-bottom:2px solid var(--line2);background:0 0;font-size:12px;font-weight:700}tbody tr:hover{background:#d6a64f12}td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}td.mono,.hash{font-family:var(--mono);word-break:break-all;color:var(--mute);font-size:12px}tr.solved td:first-child a{color:var(--ok)}.tick{color:var(--ok);font-weight:700}td.caseno{font-family:var(--type);color:var(--mute);letter-spacing:.06em;width:64px}td.title a{font-family:var(--type);font-size:16px;font-weight:700}.pill{font-family:var(--type);letter-spacing:.1em;text-transform:uppercase;border:1px solid var(--line2);color:var(--soft);background:var(--raise);border-radius:2px;padding:2px 10px;font-size:12px;display:inline-block}.tabs{border-bottom:2px solid var(--line2);flex-wrap:wrap;gap:4px;display:flex}.tab{background:var(--panel);border:1px solid var(--line2);color:var(--soft);font-family:var(--type);letter-spacing:.1em;text-transform:uppercase;cursor:pointer;border-bottom:none;border-radius:6px 6px 0 0;margin-bottom:-2px;padding:7px 16px;font-size:13px}.tab:hover{color:var(--accent-hi);background:var(--raise)}.tab[aria-pressed=true]{background:var(--paper);border-color:var(--paper2);color:var(--ink);font-weight:700}.go,.alt{min-height:42px;font-family:var(--type);letter-spacing:.12em;text-transform:uppercase;cursor:pointer;border:1px solid var(--accent);border-radius:2px;justify-content:center;align-items:center;padding:0 20px;font-size:14px;font-weight:700;text-decoration:none;display:inline-flex}.go{background:var(--accent);color:var(--accent-ink);box-shadow:0 2px #8a6a2c}.go:hover{background:var(--accent-hi);color:var(--accent-ink);text-decoration:none}.go:active{box-shadow:none;transform:translateY(1px)}.alt{color:var(--accent);background:0 0}.alt:hover{color:var(--accent-hi);background:#d6a64f1f;text-decoration:none}.go[disabled],.alt[disabled]{opacity:.5;cursor:not-allowed}.lnk{min-height:28px;color:var(--accent);font:inherit;cursor:pointer;background:0 0;border:none;padding:0;font-size:14px}.lnk:hover{text-decoration:underline}.field{flex-direction:column;gap:6px;min-width:0;display:flex}.fld{border:1px solid var(--line2);width:100%;min-height:44px;color:var(--text);font:inherit;background:#0a0806;border-radius:2px;padding:0 12px}.fld:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #d6a64f33}select.fld{padding-right:8px}.flag{font-family:var(--mono);letter-spacing:.04em}.msg{min-height:22px;font-size:14px;font-family:var(--type)}.msg.ok{color:var(--ok)}.msg.bad{color:var(--bad)}.err{border:1px solid var(--bad);background:#cf4a3e14;border-radius:2px;gap:10px;padding:10px 12px;font-size:14px;display:flex}.err b{color:var(--bad)}.banner{border:2px solid var(--ok);font-family:var(--type);color:var(--ok);letter-spacing:.04em;background:#8bbf6a14;border-radius:2px;padding:12px 16px}.stamp{font-family:var(--type);letter-spacing:.22em;text-transform:uppercase;color:var(--bad);opacity:.92;white-space:nowrap;border:2px solid;border-radius:3px;padding:2px 10px 1px;font-size:13px;font-weight:700;line-height:1.4;display:inline-block;transform:rotate(-5deg)}.stamp.ok{color:var(--ok)}.stamp.big{border-width:3px;padding:4px 16px 3px;font-size:20px}.paper{background:linear-gradient(180deg,#ffffff2e,transparent 22%),repeating-linear-gradient(0deg,transparent 0 31px,#46321412 31px 32px),var(--paper);color:var(--ink);box-shadow:0 2px 0 var(--paper2),0 14px 34px #0000008c;border-radius:2px;padding:26px 30px 24px;position:relative}.paper:before{content:"";background:#d6be789e;width:96px;height:24px;position:absolute;top:-11px;left:50%;transform:translate(-50%)rotate(-2.5deg);box-shadow:0 1px 2px #00000040}.paper p,.paper .soft{color:var(--ink)}.paper .fine{color:var(--ink-soft)}.paper code{background:#4632141f;border-radius:2px;padding:1px 5px}.paper a{color:#7a4b10}.casebar{font-family:var(--type);letter-spacing:.2em;text-transform:uppercase;color:var(--mute);flex-wrap:wrap;align-items:center;gap:8px 14px;font-size:12px;display:flex}.casebar b{color:var(--accent);font-weight:700}.casebar .rule{background:repeating-linear-gradient(90deg,var(--line2) 0 6px,transparent 6px 11px);flex:40px;height:1px}.exhibit{background:var(--raise);border:1px solid var(--line2);border-radius:2px;padding:10px 10px 12px;box-shadow:0 8px 20px #00000073}.exhibit img{border:6px solid #f1e8d2;box-shadow:0 2px 6px #00000080}.exhibit .cap{margin-bottom:8px;display:block}.hero{flex-direction:column;gap:18px;padding:30px 0 12px;display:flex;position:relative}.hero h1{text-transform:uppercase;letter-spacing:.04em;font-size:clamp(30px,5.4vw,50px)}.hero h1 em{color:var(--accent);font-style:normal}.hero .cur{background:var(--accent);vertical-align:-.1em;width:.5em;height:.95em;margin-left:4px;display:inline-block}.hero .stamp{position:absolute;top:6px;right:0}.cats{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;display:grid}.cats div{color:var(--ink);background:linear-gradient(#e9deba,#dccd9f);border-radius:0 6px 2px 2px;flex-direction:column;gap:2px;padding:20px 16px 14px;display:flex;position:relative;box-shadow:0 8px 20px #00000073}.cats div:before{content:"";background:#dccd9f;border-radius:6px 6px 0 0;width:46%;height:10px;position:absolute;top:-9px;left:0}.cats b{font-family:var(--type);text-transform:uppercase;letter-spacing:.08em;font-size:16px}.cats span{color:var(--ink-soft);font-size:13px}.steps{color:var(--soft);flex-direction:column;gap:8px;margin:0;padding-left:22px;display:flex}.steps li::marker{color:var(--accent);font-family:var(--type)}.auth{flex-wrap:wrap;align-items:flex-start;gap:32px 80px;padding:24px 0 48px;display:flex}.auth .l{flex-direction:column;flex:260px;gap:12px;display:flex}.auth .r{background:var(--panel);border:1px solid var(--line2);border-radius:2px;flex-direction:column;flex:340px;gap:20px;max-width:440px;padding:22px;display:flex;box-shadow:0 12px 30px #00000080}form{flex-direction:column;gap:16px;margin:0;display:flex}.prose{flex-direction:column;gap:14px;max-width:68ch;padding:8px 0;display:flex}.prose h2{margin-top:14px}.prose p,.prose li{color:var(--soft)}.prose ul{flex-direction:column;gap:6px;margin:0;padding-left:20px;display:flex}.qr{background:#fff;border-radius:4px;width:fit-content;padding:10px}.qr img{display:block}.hex{white-space:pre-wrap;font-family:var(--mono);font-size:13px}@media (width<=640px){.hero .stamp{align-self:flex-start;position:static}.paper{padding:22px 18px}td.caseno{display:none}}@media (prefers-reduced-motion:no-preference){.tab,.go,.alt{transition:background .12s,border-color .12s,color .12s}.hero .cur{animation:1.1s steps(2,start) infinite blink}@keyframes blink{to{visibility:hidden}}.stamp.pop{animation:.35s cubic-bezier(.2,1.6,.4,1) pop}@keyframes pop{0%{opacity:0;transform:rotate(-5deg)scale(1.9)}}}