@font-face{font-family:Folks;src:url(/fonts/Folks-Normal.ttf)format("truetype");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/Folks-Light.ttf)format("truetype");font-weight:300;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/Folks-Bold.ttf)format("truetype");font-weight:700;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/Folks-Heavy.ttf)format("truetype");font-weight:800;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/FolksBlack.ttf)format("truetype");font-weight:900;font-style:normal;font-display:swap}:root{--c-bg:#0d1117;--c-surface:#161b22;--c-border:#30363d;--c-text:#f0f6fc;--c-muted:#8b949e;--c-accent:#58a6ff;--c-accent2:#ff7b72;--clr-bg:var(--c-bg);--clr-surface:var(--c-surface);--clr-border:var(--c-border);--clr-text:var(--c-text);--clr-muted:var(--c-muted);--clr-accent:var(--c-accent);--clr-accent-light:var(--c-accent);--font:"Folks", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--radius:10px;--max-w:780px}[data-theme=light]{--c-bg:#f5f6fa;--c-surface:#fff;--c-border:#dcdde1;--c-text:#192a56;--c-muted:#718093;--c-accent:#2e86de;--c-accent2:#ee5253}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font);background:var(--clr-bg);color:var(--clr-text);-webkit-font-smoothing:antialiased;margin:0;line-height:1.7;transition:background-color .25s,color .25s}button,input,select,textarea{font-family:inherit}html.game-active .seo-page-wrapper{visibility:hidden}.seo-page-wrapper{flex-direction:column;min-height:100vh;transition:visibility;display:flex}.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}.seo-header{background:var(--clr-surface);border-bottom:1px solid var(--clr-border);z-index:100;transition:background-color .25s,border-color .25s;position:sticky;top:0}.seo-header-inner{justify-content:space-between;align-items:center;padding:14px 0;display:flex}.site-brand{letter-spacing:.06em;text-transform:uppercase;color:var(--clr-text);font-size:1.15rem;font-weight:800;text-decoration:none}.site-brand span{color:var(--clr-accent)}.btn-theme-toggle{background:var(--clr-bg);border:1px solid var(--clr-border);color:var(--clr-text);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;width:38px;height:38px;font-size:1.15rem;line-height:1;transition:transform .2s,background-color .2s,border-color .2s;display:inline-flex}.btn-theme-toggle:hover{border-color:var(--clr-accent);transform:scale(1.1)}.breadcrumb{color:var(--clr-muted);padding:10px 0 0;font-size:.8rem}.breadcrumb a{color:var(--clr-muted);text-decoration:none}.breadcrumb a:hover{color:var(--clr-text)}.hero{border-bottom:1px solid var(--clr-border);background:var(--clr-bg);padding:56px 0 48px}.hero-badge{letter-spacing:.12em;text-transform:uppercase;color:var(--clr-accent);background:var(--clr-surface);border:1px solid var(--clr-border);border-radius:20px;margin-bottom:16px;padding:4px 12px;font-size:.72rem;font-weight:700;display:inline-block}h1.hero-title{letter-spacing:-.02em;margin:0 0 16px;font-size:clamp(2.2rem,5vw,3.2rem);font-weight:900;line-height:1.15}h1.hero-title span{color:var(--clr-accent)}.hero-desc{color:var(--clr-muted);max-width:520px;margin:0 0 32px;font-size:1.05rem}.btn-play{background:var(--clr-accent);color:#fff;letter-spacing:.04em;text-transform:uppercase;border-radius:var(--radius);cursor:pointer;border:none;align-items:center;gap:12px;padding:16px 36px;font-size:1.1rem;font-weight:800;transition:transform .15s,filter .15s;display:inline-flex;position:relative;box-shadow:0 6px 20px #00000026}.btn-play:hover{filter:brightness(1.1);transform:translateY(-3px)}.btn-play:active{transform:translateY(0)}.btn-play:focus-visible{outline:3px solid var(--clr-accent);outline-offset:4px}.seo-content{flex:1;padding:48px 0}.seo-content section{margin-bottom:48px}h2{color:var(--clr-text);border-bottom:1px solid var(--clr-border);margin:0 0 14px;padding-bottom:10px;font-size:1.4rem;font-weight:700}p{color:var(--clr-text);opacity:.9;margin:0 0 14px}ul{color:var(--clr-text);opacity:.9;margin:0 0 14px;padding-left:1.4rem}ul li{margin-bottom:6px}.feature-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;display:grid}.feature-card{background:var(--clr-surface);border:1px solid var(--clr-border);border-radius:var(--radius);padding:18px 20px;transition:background-color .25s,border-color .25s}.feature-card-icon{margin-bottom:8px;font-size:1.6rem}.feature-card h3{color:var(--clr-text);margin:0 0 4px;font-size:.95rem;font-weight:700}.feature-card p{color:var(--clr-muted);margin:0;font-size:.82rem}.faq-list{flex-direction:column;gap:12px;display:flex}.faq-item{background:var(--clr-surface);border:1px solid var(--clr-border);border-radius:var(--radius);padding:18px 20px}.faq-item dt{color:var(--clr-text);margin-bottom:6px;font-size:.95rem;font-weight:700}.faq-item dd{color:var(--clr-muted);margin:0;font-size:.9rem}.seo-footer{border-top:1px solid var(--clr-border);text-align:center;color:var(--clr-muted);padding:24px 0;font-size:.82rem}.seo-footer a{color:var(--clr-muted);text-decoration:none}.seo-footer a:hover{color:var(--clr-text)}@media (width<=600px){.seo-header-inner{padding:12px 0}.hero{padding:40px 0 32px}.feature-grid{grid-template-columns:1fr 1fr}}@font-face{font-family:Folks;src:url(/fonts/Folks-Normal.ttf)format("truetype");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/Folks-Light.ttf)format("truetype");font-weight:300;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/Folks-Bold.ttf)format("truetype");font-weight:700;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/Folks-Heavy.ttf)format("truetype");font-weight:800;font-style:normal;font-display:swap}@font-face{font-family:Folks;src:url(/fonts/FolksBlack.ttf)format("truetype");font-weight:900;font-style:normal;font-display:swap}:root{--c-bg:#0d1117;--c-surface:#161b22;--c-border:#30363d;--c-text:#f0f6fc;--c-muted:#8b949e;--c-accent:#58a6ff;--c-accent2:#ff7b72;--font-family:"Folks", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--game-bg:var(--c-bg);--game-bg-2:var(--c-surface);--game-surface:var(--c-surface);--game-surface-hover:var(--c-border);--game-border:var(--c-border);--game-text:var(--c-text);--game-text-muted:var(--c-muted);--game-accent:var(--c-accent);--game-accent-glow:#58a6ff59;--game-red:var(--c-accent2);--game-black:var(--c-text);--game-gold:var(--c-accent);--game-success:var(--c-accent);--z-game-shell:9999;--z-home:10;--z-modal:100;--z-settings:200;--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--radius-xl:28px;--transition-fast:.15s ease;--transition-med:.28s cubic-bezier(.4, 0, .2, 1);--transition-slow:.42s cubic-bezier(.4, 0, .2, 1);--shadow-sm:0 2px 8px #00000026;--shadow-md:0 8px 24px #00000040;--shadow-lg:0 20px 60px #00000059;--shadow-accent:0 0 24px var(--game-accent-glow)}[data-theme=light]{--c-bg:#f5f6fa;--c-surface:#fff;--c-border:#dcdde1;--c-text:#192a56;--c-muted:#718093;--c-accent:#2e86de;--c-accent2:#ee5253;--game-accent-glow:#2e86de40}html.game-active,html.game-active body{height:100%;overflow:hidden}#game-root{z-index:var(--z-game-shell);background:var(--game-bg);color:var(--game-text);font-family:var(--font-family);padding-top:env(safe-area-inset-top,0);padding-bottom:env(safe-area-inset-bottom,0);padding-left:env(safe-area-inset-left,0);padding-right:env(safe-area-inset-right,0);flex-direction:column;display:flex;position:fixed;inset:0}#game-root button,#game-root input,#game-root select,#game-root textarea{font-family:inherit}.game-shell{flex-direction:column;width:100%;height:100%;display:flex;position:relative;overflow:hidden}.game-header{border-bottom:1px solid var(--game-border);-webkit-backdrop-filter:blur(8px);background:#00000040;flex-shrink:0;justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.game-header-title{letter-spacing:.06em;color:var(--game-text);text-transform:uppercase;margin:0;font-size:1.1rem;font-weight:700}.game-header-actions{align-items:center;gap:8px;display:flex}.btn-icon{background:var(--game-surface);border:1px solid var(--game-border);color:var(--game-text);border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);align-items:center;gap:6px;padding:8px 16px;font-size:.875rem;font-weight:600;line-height:1;display:inline-flex}.btn-icon:hover{background:var(--game-surface-hover);border-color:var(--game-accent)}.btn-icon:focus-visible{outline:2px solid var(--game-accent);outline-offset:2px}.btn-icon-circle{background:var(--game-surface);border:1px solid var(--game-border);color:var(--game-text);cursor:pointer;width:38px;height:38px;transition:background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);border-radius:50%;justify-content:center;align-items:center;font-size:1.1rem;display:inline-flex}.btn-icon-circle:hover{background:var(--game-surface-hover);border-color:var(--game-accent);transform:scale(1.08)}.btn-icon-circle:focus-visible{outline:2px solid var(--game-accent);outline-offset:2px}.screen{transition:opacity var(--transition-med), transform var(--transition-med);flex-direction:column;display:flex;position:absolute;inset:0}.screen.entering{opacity:0;transform:scale(.97)}.screen.visible{opacity:1;transform:scale(1)}.screen.exiting{opacity:0;pointer-events:none;transform:scale(1.02)}#game-screen{flex-direction:column;flex:1;display:flex}#game-container{flex:1;justify-content:center;align-items:center;padding:12px;display:flex;position:relative;overflow:hidden}#game-canvas{border-radius:var(--radius-sm);max-width:100%;max-height:100%;box-shadow:var(--shadow-lg), var(--shadow-accent)}.game-status-bar{border-top:1px solid var(--game-border);background:#0003;flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;padding:10px 20px;display:flex}.player-indicator{align-items:center;gap:10px;font-size:.9rem;font-weight:600;display:flex}.player-dot{border:2px solid #ffffff4d;border-radius:50%;flex-shrink:0;width:14px;height:14px}.player-dot.red{background:var(--game-red)}.player-dot.black{background:#90a4ae;border-color:#607d8b}.thinking-badge{background:var(--game-accent);color:#fff;border-radius:20px;padding:3px 10px;font-size:.75rem;font-weight:700;animation:1.2s ease-in-out infinite pulse-badge;display:none}.thinking-badge.visible{display:inline-flex}@keyframes pulse-badge{0%,to{opacity:1}50%{opacity:.5}}.move-counter{color:var(--game-text-muted);font-size:.8rem}#game-loading-overlay{background:var(--game-bg);z-index:10;flex-direction:column;justify-content:center;align-items:center;gap:16px;display:flex;position:absolute;inset:0}.spinner{border:3px solid #ffffff1a;border-top:3px solid var(--game-accent);border-radius:50%;width:44px;height:44px;animation:.9s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}#game-loading-overlay p{color:var(--game-text-muted);margin:0;font-size:.9rem}#game-modal-layer{pointer-events:none;z-index:var(--z-modal);justify-content:center;align-items:center;display:flex;position:absolute;inset:0}#game-modal-layer.active{pointer-events:auto;-webkit-backdrop-filter:blur(4px);background:#0009}#settings-overlay{z-index:var(--z-settings);-webkit-backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:opacity var(--transition-med);background:#000000a6;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}#settings-overlay.visible{opacity:1;pointer-events:auto}.settings-panel{background:var(--game-surface);border:1px solid var(--game-border);border-radius:var(--radius-xl);width:min(360px,90vw);box-shadow:var(--shadow-lg);transition:transform var(--transition-med);flex-direction:column;gap:24px;padding:32px;display:flex;transform:translateY(20px)scale(.96)}#settings-overlay.visible .settings-panel{transform:translateY(0)scale(1)}.settings-title{letter-spacing:.04em;text-transform:uppercase;color:var(--game-text-muted);justify-content:space-between;align-items:center;margin:0;font-size:1.1rem;font-weight:700;display:flex}.settings-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.settings-label{color:var(--game-text);align-items:center;gap:10px;font-size:1rem;font-weight:500;display:flex}.toggle-switch{flex-shrink:0;width:52px;height:28px;position:relative}.toggle-switch input{opacity:0;width:0;height:0;position:absolute}.toggle-track{cursor:pointer;transition:background var(--transition-fast);background:#ffffff1f;border-radius:14px;position:absolute;inset:0}.toggle-track:after{content:"";width:22px;height:22px;transition:transform var(--transition-fast);box-shadow:var(--shadow-sm);background:#fff;border-radius:50%;position:absolute;top:3px;left:3px}.toggle-switch input:checked+.toggle-track{background:var(--game-accent)}.toggle-switch input:checked+.toggle-track:after{transform:translate(24px)}.toggle-switch input:focus-visible+.toggle-track{outline:2px solid var(--game-accent);outline-offset:2px}.settings-link{border-radius:var(--radius-md);background:var(--game-bg-2);border:1px solid var(--game-border);color:var(--game-text);transition:background var(--transition-fast), border-color var(--transition-fast);align-items:center;gap:10px;padding:14px 18px;font-size:.95rem;font-weight:500;text-decoration:none;display:flex}.settings-link:hover{background:var(--game-surface-hover);border-color:var(--game-accent);color:var(--game-text);text-decoration:none}.settings-link-icon{text-align:center;width:24px;font-size:1.2rem}#home-screen{background:var(--game-bg);flex-direction:column;flex:1;justify-content:center;align-items:center;padding:24px;display:flex;position:relative;overflow:hidden}.home-logo{z-index:1;flex-direction:column;align-items:center;gap:10px;margin-bottom:48px;display:flex;position:relative}.home-logo-icon{font-size:3.5rem;line-height:1;animation:3s ease-in-out infinite float}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.home-logo-title{letter-spacing:.1em;text-transform:uppercase;color:var(--game-text);margin:0;font-size:2.8rem;font-weight:800}.home-logo-subtitle{color:var(--game-text-muted);letter-spacing:.18em;text-transform:uppercase;margin:0;font-size:.85rem}.home-menu-card{background:var(--game-surface);border:1px solid var(--game-border);border-radius:var(--radius-xl);width:min(380px,100%);box-shadow:var(--shadow-lg);z-index:1;flex-direction:column;gap:14px;padding:32px 40px;display:flex;position:relative}.btn-home-primary{background:var(--game-accent);color:#fff;border-radius:var(--radius-md);cursor:pointer;letter-spacing:.02em;transition:transform var(--transition-fast), filter var(--transition-fast);box-shadow:var(--shadow-sm);text-align:left;border:none;align-items:center;gap:14px;width:100%;padding:18px 24px;font-size:1.05rem;font-weight:700;display:flex;position:relative;overflow:hidden}.btn-home-primary:hover{filter:brightness(1.1);transform:translateY(-2px)}.btn-home-primary:active{transform:translateY(0)}.btn-home-primary:focus-visible{outline:2px solid var(--game-accent);outline-offset:3px}.btn-home-primary.secondary{background:var(--game-surface);border:1px solid var(--game-border);color:var(--game-text)}.btn-home-primary.secondary:hover{border-color:var(--game-accent)}.btn-home-icon{text-align:center;flex-shrink:0;width:28px;font-size:1.4rem}.btn-home-label{flex:1}.btn-home-chevron{opacity:.5;flex-shrink:0;font-size:1rem}.home-divider{background:var(--game-border);height:1px;margin:4px 0}.home-bottom-row{gap:10px;margin-top:2px;display:flex}.btn-home-secondary{color:var(--game-text);border:1px solid var(--game-border);border-radius:var(--radius-md);cursor:pointer;letter-spacing:.03em;transition:color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);background:0 0;flex:1;justify-content:center;align-items:center;gap:8px;padding:12px;font-size:.875rem;font-weight:600;display:flex}.btn-home-secondary:hover{background:var(--game-surface);border-color:var(--game-accent)}.btn-home-secondary.danger:hover{color:var(--game-red);border-color:var(--game-red)}.btn-home-secondary:focus-visible{outline:2px solid var(--game-accent);outline-offset:2px}.home-version{color:var(--game-text-muted);letter-spacing:.1em;font-size:.72rem;position:absolute;bottom:16px}