@import "https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Playfair+Display:ital,wght@1,600&display=swap";:root{color:#183041;font-synthesis:none;--ink:#183041;--muted:#66747b;--paper:#faf8f3;--accent:#c6823c;--accent-soft:#f2dfc5;--line:#c9c7bd;--box:#214154;--cell:#fbfaf6;--related:#edf1ec;--shadow:0 24px 70px #1c2d3421;background:#f4f0e8;font-family:DM Sans,sans-serif}:root[data-theme=dark]{color:#e9ede9;--ink:#e9ede9;--muted:#9aa9af;--paper:#12232e;--accent:#e8b563;--accent-soft:#453721;--line:#40515a;--box:#e8b563;--cell:#152935;--related:#1d3541;--shadow:0 28px 80px #00000052;background:#0d1821}*{box-sizing:border-box}body{background:radial-gradient(circle at 15% 15%,#c6823c14,transparent 25%),var(--paper);min-width:320px;min-height:100vh;color:var(--ink);margin:0;transition:all .25s}button{font:inherit;color:inherit}button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.app-shell{flex-direction:column;width:min(1180px,100% - 40px);min-height:100vh;margin:auto;display:flex}header{border-bottom:1px solid color-mix(in srgb,var(--line) 55%,transparent);justify-content:space-between;align-items:center;height:92px;display:flex}.brand{color:inherit;align-items:center;gap:12px;text-decoration:none;display:flex}.brand-mark{background:var(--ink);width:45px;height:45px;color:var(--paper);border-radius:12px;place-items:center;font-family:Playfair Display;font-size:28px;display:grid}.brand strong,.brand small{letter-spacing:.18em;display:block}.brand strong{font-size:14px}.brand small{color:var(--muted);margin-top:3px;font-size:8px}.icon-button{border:1px solid var(--line);cursor:pointer;background:0 0;border-radius:50%;place-items:center;width:42px;height:42px;display:grid}.icon-button svg{width:18px}main{flex:1;padding:50px 0 70px}.intro{justify-content:space-between;align-items:end;gap:30px;margin-bottom:38px;display:flex}.eyebrow{color:var(--accent);letter-spacing:.18em;align-items:center;gap:7px;margin:0 0 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button:disabled{opacity:.3}.check-button,.new-button{cursor:pointer;border-radius:12px;justify-content:center;align-items:center;gap:9px;width:100%;height:51px;font-weight:700;display:flex}.check-button{background:var(--ink);color:var(--paper);border:0;margin-top:17px}.new-button{border:1px solid var(--line);background:0 0;margin-top:9px}.check-button svg,.new-button svg{width:17px}.message{text-align:center;color:var(--muted);min-height:16px;font-size:11px}.message.success{color:var(--accent);font-weight:700}footer{border-top:1px solid color-mix(in srgb,var(--line) 55%,transparent);min-height:72px;color:var(--muted);letter-spacing:.06em;justify-content:space-between;align-items:center;font-size:10px;display:flex}@media (width<=850px){main{padding-top:32px}.intro{flex-direction:column;align-items:start}.game-layout{grid-template-columns:1fr;max-width:620px;margin:auto}.controls{max-width:none}.difficulty{width:100%;overflow:auto}.difficulty button{flex:1}.number-pad 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