:root{color-scheme:light;--bg: #ffffff;--surface: #f6f8f7;--surface-strong: #e7eeeb;--ink: #17211f;--muted: #5b6864;--line: #d8e0dd;--accent: #0f766e;--accent-strong: #0b5f59;--accent-soft: #dff4ef;--warning: #b45309;--danger: #b42318;--success: #15803d;--shadow: 0 18px 48px rgba(23, 33, 31, .08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:var(--bg);color:var(--ink);scroll-behavior:smooth}body{margin:0;min-width:320px;line-height:1.5;text-rendering:optimizeLegibility}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.site-shell{min-height:100vh;background:linear-gradient(180deg,#fff,#f8fbfa 42%,#fff)}.container{width:min(1120px,calc(100% - 32px));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.topbar{position:sticky;top:0;z-index:20;background:#ffffffeb;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:0}.brand-mark{display:grid;width:36px;height:36px;place-items:center;border-radius:8px;background:var(--accent);color:#fff;font-size:20px}.nav{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.95rem}.nav a,.language-select{border-radius:8px;padding:8px 10px}.nav a:hover,.language-select:hover{background:var(--surface);color:var(--ink)}.language-select{border:1px solid var(--line);background:#fff;color:var(--ink)}.hero-game{display:grid;grid-template-columns:minmax(0,.88fr) minmax(360px,1.12fr);align-items:start;gap:34px;padding:36px 0 44px}.hero-copy{padding-top:20px}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 14px;border:1px solid var(--line);border-radius:999px;padding:6px 10px;color:var(--accent-strong);background:#fff;font-size:.88rem;font-weight:700}h1,h2,h3{margin:0;line-height:1.08;letter-spacing:0}h1{max-width:720px;font-size:clamp(2.35rem,6vw,4.9rem)}h2{font-size:clamp(1.8rem,3.4vw,2.8rem)}h3{font-size:1.18rem}.lead{max-width:640px;margin:18px 0 0;color:var(--muted);font-size:clamp(1.02rem,2vw,1.2rem)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border:1px solid transparent;border-radius:8px;padding:10px 16px;font-weight:800}.button.primary{background:var(--accent);color:#fff}.button.primary:hover{background:var(--accent-strong)}.button.secondary{border-color:var(--line);background:#fff;color:var(--ink)}.game-panel{border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:var(--shadow);padding:14px}.game-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.game-status{display:flex;align-items:center;gap:10px;font-weight:800}.timer{min-width:72px;border-radius:8px;padding:7px 10px;background:var(--surface);color:var(--ink);font-variant-numeric:tabular-nums;text-align:center}.game-actions{display:flex;flex-wrap:wrap;gap:8px}.tool-button{min-height:36px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);padding:7px 10px;font-weight:700}.tool-button[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-strong)}.tool-button:hover{background:var(--surface)}.board-wrap{width:min(100%,620px);margin-inline:auto}.queens-board{display:grid;aspect-ratio:1;overflow:hidden;border:2px solid #20302d;border-radius:8px;background:var(--line);user-select:none;touch-action:none}.cell{position:relative;display:grid;min-width:0;min-height:0;place-items:center;border:1px solid rgba(23,33,31,.28);color:#14211e;font-weight:900;transition:transform .14s ease,box-shadow .14s ease,background-color .14s ease}.cell:focus-visible{z-index:2;outline:3px solid #111827;outline-offset:-3px}.cell:hover{z-index:1;box-shadow:inset 0 0 0 3px #ffffff8a}.cell.is-queen{font-size:min(2.6rem,calc(84vw / var(--board-size) * .58))}.cell.is-x{color:#14211e8c;font-size:min(2rem,calc(84vw / var(--board-size) * .52))}.cell.is-conflict{box-shadow:inset 0 0 0 4px #b42318b8}.cell.is-hint{animation:hintPulse 1s ease-out 2}@keyframes hintPulse{0%,to{box-shadow:inset 0 0 #0f766e00}45%{box-shadow:inset 0 0 0 6px #0f766ebf}}.game-message{min-height:28px;margin:12px 0 0;color:var(--muted);font-weight:700}.game-message.success{color:var(--success)}.game-message.danger{color:var(--danger)}.rules-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;padding:22px 0 54px}.rule{border:1px solid var(--line);border-radius:8px;background:#fff;padding:16px}.rule strong{display:block;margin-bottom:8px}.rule p{margin:0;color:var(--muted)}.section{padding:58px 0;border-top:1px solid var(--line)}.split{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:32px;align-items:start}.content-flow>*+*{margin-top:16px}.content-flow p,.content-flow li{color:var(--muted);font-size:1.03rem}.steps,.feature-grid,.strategy-grid,.faq-list{display:grid;gap:12px}.feature-grid,.strategy-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.feature,.strategy-card,.faq-item{border:1px solid var(--line);border-radius:8px;background:#fff;padding:18px}.blog-list{display:grid;gap:16px;margin-top:26px}.blog-card{border:1px solid var(--line);border-radius:8px;background:#fff;padding:22px}.blog-card h2{margin-top:10px;font-size:clamp(1.35rem,2.5vw,1.85rem)}.blog-card p{color:var(--muted)}.article-page{width:min(880px,calc(100% - 32px));margin:0 auto;padding:54px 0 76px}.article-meta{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:.92rem}.article-meta span{border:1px solid var(--line);border-radius:999px;padding:4px 9px;background:#fff}.summary-box,.toc{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:18px}.summary-box ul{margin-bottom:0}.toc{display:grid;gap:8px}.toc a,.text-link{color:var(--accent-strong);font-weight:800;text-decoration:underline;text-underline-offset:3px}.steps{counter-reset:step}.step{position:relative;border-left:4px solid var(--accent);border-radius:0 8px 8px 0;background:var(--surface);padding:16px 18px}.step:before{counter-increment:step;content:counter(step);display:inline-grid;width:28px;height:28px;margin-right:10px;place-items:center;border-radius:999px;background:var(--accent);color:#fff;font-weight:900}.prose-page{width:min(860px,calc(100% - 32px));margin:0 auto;padding:54px 0 72px}.prose-page .lead{max-width:none}.footer{border-top:1px solid var(--line);padding:30px 0;background:var(--surface);color:var(--muted)}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:18px}.footer-links{display:flex;flex-wrap:wrap;gap:12px}@media(max-width:900px){.hero-game,.split{grid-template-columns:1fr}.hero-copy{padding-top:0}.rules-strip,.feature-grid,.strategy-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:640px){.container{width:min(100% - 20px,1120px)}.topbar-inner{align-items:flex-start;flex-direction:column;padding:12px 0}.nav{width:100%;overflow-x:auto;padding-bottom:4px}.hero-game{gap:22px;padding-top:24px}.game-panel{padding:10px}.game-toolbar{align-items:stretch;flex-direction:column}.game-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.tool-button{padding-inline:8px}.rules-strip,.feature-grid,.strategy-grid{grid-template-columns:1fr}.footer-inner{align-items:flex-start;flex-direction:column}}