.rules-page{background:var(--paper-050)}.rules-shell{width:min(var(--shell), calc(100% - 48px));margin-inline:auto}.rules-header{z-index:20;border-bottom:1px solid var(--line-dark);color:var(--text-on-dark);background:var(--ink-950);position:sticky;top:0}.rules-header-inner{justify-content:space-between;align-items:center;gap:24px;min-height:72px;display:flex}.rules-header-nav{align-items:center;gap:8px;display:flex}.rules-header-nav a{min-height:44px;font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase;border:1px solid #0000;border-radius:10px;align-items:center;padding-inline:16px;font-size:12px;font-weight:700;text-decoration:none;transition:color .18s,border-color .18s,transform .18s;display:inline-flex}.rules-header-nav a:hover{border-color:var(--line-dark);color:var(--score-yellow);transform:translateY(-2px)}.rules-hero{border-bottom:2px solid var(--ink-950);color:var(--text-on-dark);background:var(--ink-850);overflow:hidden}.rules-hero-inner{grid-template-columns:minmax(0,1fr) 260px;align-items:end;gap:64px;padding-block:64px 72px;display:grid}.rules-kicker,.contents-label,.callout-label{font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;margin:0;font-size:11px;font-weight:700}.rules-kicker{color:var(--score-yellow);margin-bottom:16px}.rules-hero h1{max-width:760px;font-family:var(--display);letter-spacing:-.055em;margin:0;font-size:clamp(48px,7vw,84px);font-weight:800;line-height:.92}.rules-lede{max-width:680px;color:var(--text-muted-dark);margin:24px 0 0;font-size:20px}.source-card{border:2px solid var(--score-yellow);color:var(--text-muted-dark);background:var(--ink-950);box-shadow:8px 8px 0 var(--logic-blue);font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;margin:0;padding:20px;font-size:11px;line-height:1.8}.source-card a{color:var(--score-yellow);font-family:var(--body);letter-spacing:0;text-transform:none;font-size:18px;font-weight:700}.rules-layout{grid-template-columns:260px minmax(0,760px);justify-content:space-between;gap:80px;padding-block:80px 112px;display:grid}.contents-card{border:2px solid var(--ink-950);background:var(--paper-100);box-shadow:7px 7px 0 var(--ink-950);align-self:start;padding:24px;position:sticky;top:96px}.contents-label{color:var(--logic-blue-dark);margin-bottom:16px}.contents-card ol{counter-reset:contents;gap:4px;margin:0;padding:0;list-style:none;display:grid}.contents-card li{counter-increment:contents}.contents-card a{min-height:44px;color:var(--text-on-light);grid-template-columns:28px minmax(0,1fr);align-items:center;gap:8px;font-size:15px;font-weight:700;line-height:1.2;text-decoration:none;display:grid}.contents-card a:before{content:"0" counter(contents);color:var(--risk-coral-dark);font-family:var(--mono);font-size:10px}.contents-card a:hover{color:var(--logic-blue-dark);text-underline-offset:4px;text-decoration:underline}.rules-article{min-width:0}.rule-section{grid-template-columns:56px minmax(0,1fr);gap:24px;padding-block:0 72px;scroll-margin-top:96px;display:grid}.rule-section+.rule-section{border-top:2px solid var(--ink-950);padding-top:72px}.section-number{border:2px solid var(--ink-950);width:48px;height:48px;color:var(--ink-950);background:var(--risk-coral);box-shadow:4px 4px 0 var(--ink-950);font-family:var(--mono);place-items:center;font-size:12px;font-weight:700;display:grid;transform:rotate(-3deg)}.rule-section h2{font-family:var(--display);letter-spacing:-.04em;margin:0 0 24px;font-size:clamp(32px,5vw,48px);font-weight:800;line-height:1}.rule-section p,.rule-section li{font-size:18px}.rule-section p{margin:0 0 20px}.rule-section ul,.rule-section ol{gap:12px;margin:0 0 24px;padding-left:24px;display:grid}.rule-section li::marker{color:var(--risk-coral-dark);font-family:var(--mono);font-weight:700}.section-lead{font-weight:700;line-height:1.4;font-size:22px!important}.rule-callout{border:2px solid var(--ink-950);box-shadow:6px 6px 0 var(--ink-950);margin:28px 0;padding:24px}.rule-callout p:last-child{margin-bottom:0}.rule-callout .callout-label{margin-bottom:8px}.callout-seven{background:var(--risk-coral)}.callout-doubles{color:var(--text-on-dark);background:var(--logic-blue)}.callout-bank{background:var(--proof-mint)}.play-rules-button{border:2px solid var(--ink-950);min-height:52px;color:var(--ink-950);background:var(--score-yellow);box-shadow:6px 6px 0 var(--ink-950);align-items:center;gap:16px;margin-top:12px;padding:12px 20px;font-weight:700;text-decoration:none;transition:transform .18s,box-shadow .18s;display:inline-flex}.play-rules-button:hover{box-shadow:3px 3px 0 var(--ink-950);transform:translate(3px,3px)}.rules-footer{border-top:2px solid var(--score-yellow);color:var(--text-muted-dark);background:var(--ink-950)}.rules-footer-inner{justify-content:space-between;gap:48px;padding-block:40px;display:flex}.rules-footer p{margin:0}.rules-footer strong,.rules-footer a{color:var(--text-on-dark)}@media (width<=900px){.rules-hero-inner{grid-template-columns:1fr;gap:36px}.source-card{max-width:360px}.rules-layout{grid-template-columns:1fr;gap:72px}.contents-card{position:static}.contents-card ol{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}}@media (width<=560px){.rules-shell{width:min(var(--shell), calc(100% - 32px))}.rules-header-inner{min-height:68px}.rules-header .brand{font-size:16px}.rules-header .brand-mark{width:34px;height:34px}.rules-header-nav{gap:0}.rules-header-nav a{padding-inline:8px;font-size:10px}.rules-header-nav a:first-child{display:none}.rules-hero-inner{padding-block:48px 56px}.rules-hero h1{font-size:clamp(44px,15vw,60px)}.rules-lede{font-size:18px}.rules-layout{gap:64px;padding-block:56px 80px}.contents-card{padding:20px}.contents-card ol{grid-template-columns:1fr}.rule-section{grid-template-columns:1fr;gap:20px;padding-bottom:56px}.rule-section+.rule-section{padding-top:56px}.rule-section p,.rule-section li{font-size:17px}.rule-callout{padding:20px}.rules-footer-inner{flex-direction:column;gap:24px}}@media (prefers-reduced-motion:reduce){.rules-header-nav a,.play-rules-button{transition:none}}