.rs-puzzle-page{--rs-font-display:var(--font-prata), Georgia, serif;--rs-font-heading:var(--font-fraunces), Georgia, serif;--rs-font-body:var(--font-atkinson), system-ui, sans-serif;--rs-font-mono:var(--font-rs-mono), ui-monospace, monospace}:root{--rs-page-glow:radial-gradient(1100px 640px at 50% -8%, #8a65340d, transparent 62%);--rs-card-bg:#fff;--rs-track-bg:#f2efe9;--rs-input-bg:#f7f5f0;--rs-accent:#8a6534;--rs-accent-contrast:#fff;--rs-accent-fill:#8a65341a;--rs-accent-border:#8a653466;--rs-text-primary:#1f1e1b;--rs-text-rules:#3c3b36;--rs-text-body:#45443f;--rs-text-muted:#6e6d65;--rs-text-subtitle:#77766e;--rs-text-button:#6b6a63;--rs-text-step-indicator:#8c8b83;--rs-text-label:#93928a;--rs-text-bold:#262521;--rs-text-equation:#31302b;--rs-text-strong:#33322d;--rs-eyebrow:#8a6f42;--rs-border-divider:#00000014;--rs-border-soft:#00000017;--rs-border-card:#0000001a;--rs-border-pill:#0000001f;--rs-border-input:#00000029;--rs-border-hover:#00000047;--rs-hover-bg:#0000000a;--rs-box-bg:#00000006;--rs-trace-alt-bg:#00000008;--rs-heat-0:#ecebe6;--rs-heat-1:#8a653440;--rs-heat-2:#8a653473;--rs-heat-3:#8a6534ad;--rs-heat-4:#8a6534;--rs-green:#35855c;--rs-blue:#2e6fa9;--rs-tan:#97764a;--rs-purple:#8632d6}.dark{--rs-page-glow:radial-gradient(1100px 640px at 50% -8%, #f3d9bb0b, transparent 62%);--rs-card-bg:#0d0d10;--rs-track-bg:#0e0e12;--rs-input-bg:#111114;--rs-accent:#f3d9bb;--rs-accent-contrast:#0a0a0c;--rs-accent-fill:#f3d9bb1a;--rs-accent-border:#f3d9bb66;--rs-text-primary:#e9e7e2;--rs-text-rules:#c3c2bb;--rs-text-body:#b9b8b2;--rs-text-muted:#8f8e87;--rs-text-subtitle:#8a897f;--rs-text-button:#a3a29b;--rs-text-step-indicator:#6f6f68;--rs-text-label:#5c5c56;--rs-text-bold:#e4e2db;--rs-text-equation:#e6e4dd;--rs-text-strong:#d8d6cf;--rs-eyebrow:#c9b79c;--rs-border-divider:#ffffff0f;--rs-border-soft:#ffffff12;--rs-border-card:#ffffff14;--rs-border-pill:#ffffff17;--rs-border-input:#ffffff1f;--rs-border-hover:#ffffff38;--rs-hover-bg:#ffffff0a;--rs-box-bg:#ffffff05;--rs-trace-alt-bg:#ffffff04;--rs-heat-0:#141417;--rs-heat-1:#f3d9bb38;--rs-heat-2:#f3d9bb73;--rs-heat-3:#f3d9bbb3;--rs-heat-4:#f3d9bb;--rs-green:#6fae86;--rs-blue:#7fb0e0;--rs-tan:#c9b79c;--rs-purple:#a855f7}.rs-puzzle-page ::selection{background:var(--rs-accent-fill)}.rs-puzzle-page .katex{font-size:1.02em}@keyframes rs-live-dot{0%,to{opacity:.35}50%{opacity:1}}.rs-live-dot{animation:1.8s ease-in-out infinite rs-live-dot}.rs-shell{margin:0 auto;padding:0 40px 100px}.rs-gap-header{height:52px}.rs-gap-section{height:60px}@media (max-width:919px){.rs-shell{padding:0 28px 80px}.rs-gap-header{height:44px}.rs-gap-section{height:48px}}@media (max-width:639px){.rs-shell{padding:0 18px 64px}.rs-gap-header{height:36px}.rs-gap-section{height:40px}}.rs-page-title{font-size:clamp(34px,9vw,56px)}.rs-streak-card{padding:22px 26px}.rs-streak-header{justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;display:flex}.rs-streak-heading{align-items:center;gap:7px;display:flex}.rs-streak-dot{background:var(--rs-green);border-radius:50%;width:6px;height:6px}.rs-streak-title{font-family:var(--rs-font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--rs-text-muted);font-size:9.5px;font-weight:600}.rs-streak-metrics{border-top:1px solid var(--rs-border-divider);justify-content:center;gap:40px;margin-top:20px;padding-top:16px;display:flex}@media (max-width:639px){.rs-streak-card{padding:16px 14px}.rs-streak-metrics{text-align:center;grid-template-columns:repeat(2,minmax(0,1fr));justify-items:center;gap:14px 24px;display:grid}}.rs-gh-pill{background:var(--rs-hover-bg);border:1px solid var(--rs-border-pill);font-family:var(--rs-font-mono);letter-spacing:.04em;color:var(--rs-text-muted);border-radius:8px;align-self:center;align-items:center;gap:6px;padding:5px 10px;font-size:10.5px;text-decoration:none;transition:border-color .18s,color .18s;display:inline-flex}a.rs-gh-pill:hover{border-color:var(--rs-border-hover);color:var(--rs-text-primary)}.rs-gh-pill svg{width:13px;height:13px;display:block}.rs-rules-credit-link{color:var(--rs-accent);text-decoration:none;transition:color .18s}.rs-rules-credit-link:hover{text-decoration:underline}.rs-variant-tab{font-family:var(--rs-font-mono);letter-spacing:.03em;color:var(--rs-text-button);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:8px 20px;font-size:12.5px;transition:all .2s}.rs-variant-tab:hover{background:var(--rs-hover-bg);color:var(--rs-text-primary)}.rs-variant-tab.is-active,.rs-variant-tab.is-active:hover{background:var(--rs-accent);color:var(--rs-accent-contrast)}.rs-step-pill{border:1px solid var(--rs-border-pill);color:var(--rs-text-muted);cursor:pointer;background:0 0;border-radius:999px;align-items:center;gap:8px;padding:7px 14px;transition:all .2s;display:inline-flex}.rs-step-pill:hover{border-color:var(--rs-border-hover);color:var(--rs-text-primary)}.rs-step-pill.is-active,.rs-step-pill.is-active:hover{border-color:var(--rs-accent-border);background:var(--rs-accent-fill);color:var(--rs-accent)}.rs-icon-btn{width:32px;height:32px;color:var(--rs-text-button);cursor:pointer;background:0 0;border:none;border-radius:999px;justify-content:center;align-items:center;transition:background .2s,color .2s,transform .15s;display:inline-flex}.rs-icon-btn:hover{background:var(--rs-hover-bg);color:var(--rs-text-primary)}.rs-icon-btn:active{transform:scale(.9)}.rs-icon-btn:disabled{opacity:.3;cursor:default;pointer-events:none}.rs-icon-btn--primary{background:var(--rs-accent);color:var(--rs-accent-contrast)}.rs-icon-btn--primary:hover{background:var(--rs-accent);color:var(--rs-accent-contrast);filter:brightness(1.06)}@media (max-width:919px){.rs-icon-btn{width:38px;height:38px}}.rs-tooltip{position:relative}.rs-tooltip:after{content:attr(data-tooltip);background:var(--rs-card-bg);border:1px solid var(--rs-border-card);color:var(--rs-text-strong);font-family:var(--rs-font-mono);letter-spacing:.04em;white-space:nowrap;opacity:0;pointer-events:none;z-index:10;border-radius:6px;padding:5px 9px;font-size:10.5px;transition:opacity .15s,transform .15s;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%)translateY(2px)}.rs-tooltip:hover:after{opacity:1;transform:translate(-50%)translateY(0)}.rs-select{font-family:var(--rs-font-mono);color:var(--rs-text-strong);background:var(--rs-input-bg);border:1px solid var(--rs-border-input);cursor:pointer;border-radius:8px;padding:6px 12px;font-size:12px}.rs-select option{background:var(--rs-input-bg);color:var(--rs-text-strong)}.rs-eq-box{background:var(--rs-box-bg);border:1px solid var(--rs-border-divider);color:var(--rs-text-equation);border-radius:12px;margin:6px 0 20px;padding:14px 18px;overflow-x:auto}.rs-eq-box>span{margin:0!important}.rs-eq-box .katex-display{margin:0}.rs-algo-columns{align-items:flex-start;gap:48px;display:flex}.rs-algo-left{flex-shrink:0;width:330px}@media (min-width:920px){.rs-algo-left{align-self:flex-start;position:sticky;top:32px}}@media (max-width:919px){.rs-algo-columns{flex-direction:column;align-items:stretch;gap:32px}.rs-algo-left{width:min(330px,100%);margin-inline:auto}}.rs-algo-step-title{font-size:28px}@media (max-width:639px){.rs-algo-step-title{font-size:24px}}.rs-test-card{background:var(--rs-card-bg);border:1px solid var(--rs-border-card);border-radius:16px;flex-shrink:0;width:fit-content;min-width:100%;max-width:calc(100vw - 48px);padding:24px}.rs-test-controls{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;display:flex}.rs-test-metrics{border-top:1px solid var(--rs-border-divider);justify-content:flex-start;gap:28px;margin-top:18px;padding-top:16px;display:flex}.rs-test-metrics.is-centered{justify-content:center}.rs-board-status{padding:56px 64px}@media (max-width:919px){.rs-test-card{width:100%;max-width:100%}.rs-test-controls{flex-wrap:nowrap}}@media (max-width:639px){.rs-test-card{padding:16px}.rs-test-metrics,.rs-test-metrics.is-centered{text-align:center;grid-template-columns:repeat(2,minmax(0,1fr));justify-items:center;gap:14px 24px;display:grid}.rs-board-status{padding:32px 24px}}