@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{color-scheme:dark;--bg:#101817;--panel:#18211f;--board:#1d2825;--text:#edf0e9;--muted:#9ca9a0;--line:#334139;--box-line:#758477;--accent:#c6dfa9;--accent-ink:#1d3021;--peer:#29362d;--selected:#546b43;--same:#354c36;--entry:#c6dfa9;--wrong:#f4a6a0;--shadow:0 24px 60px #0002}
:root[data-theme=light]{color-scheme:light;--bg:#f3f2eb;--panel:#fafbf5;--board:#fffef9;--text:#233329;--muted:#66756a;--line:#d4dbcf;--box-line:#82917e;--accent:#365939;--accent-ink:#fff;--peer:#eef1e7;--selected:#c9dcad;--same:#dce7d2;--entry:#356e48;--wrong:#b43737;--shadow:0 24px 60px #34462a0a}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:'DM Sans',sans-serif;transition:background .25s,color .25s}body:before{content:'';position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 55% 10%,#97b86d08,transparent 60%)}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:0}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:4px}header{max-width:1280px;margin:auto;padding:34px 48px;display:flex;justify-content:space-between;align-items:center}.brand{display:flex;gap:13px;align-items:center;color:var(--text);text-decoration:none;font:700 12px 'Manrope',sans-serif;letter-spacing:2.7px}.brand-icon{border:1px solid var(--muted);font:italic 30px Georgia;display:grid;place-items:center;width:41px;height:41px}.brand-sub{display:block;font-size:8px;letter-spacing:2px;color:var(--muted);margin-top:5px}.theme{background:transparent;border:1px solid var(--line);border-radius:24px;padding:10px 16px;display:flex;gap:10px;font-size:12px;align-items:center}main{max-width:1040px;margin:32px auto 58px;padding:0 32px}.intro{margin-bottom:40px}.eyebrow,.card-eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--muted)}.eyebrow{display:flex;align-items:center;gap:9px}.eyebrow span,.status-dot{height:5px;width:5px;display:inline-block;background:var(--accent);border-radius:50%}h1{font-family:'Manrope',sans-serif;font-weight:500;font-size:clamp(36px,5vw,58px);letter-spacing:-2.5px;margin:15px 0 12px;line-height:1.15}.serif{font:italic 1.06em Georgia,serif;font-weight:400;color:var(--accent)}.intro p{font-size:14px;color:var(--muted);margin:0}.game-layout{display:grid;grid-template-columns:minmax(0,560px) minmax(260px,1fr);gap:40px;align-items:start}.board-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:12px}.difficulty{display:flex;background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:4px;gap:3px}.difficulty button{background:transparent;color:var(--muted);font-size:12px;padding:9px 20px;border-radius:6px}.difficulty button.active{background:var(--accent);color:var(--accent-ink);font-weight:700}.clock{display:flex;align-items:center;gap:13px;font-size:13px;font-variant-numeric:tabular-nums}.clock button{background:none;color:var(--muted);font-size:18px;padding:8px}.board-wrap{position:relative}.board{display:grid;grid-template-columns:repeat(9,1fr);border:2px solid var(--box-line);border-radius:10px;overflow:hidden;background:var(--board);box-shadow:var(--shadow);aspect-ratio:1}.cell{background:var(--board);padding:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);position:relative;font:500 clamp(19px,2.4vw,27px) 'Manrope',sans-serif;display:grid;place-items:center;min-width:0;aspect-ratio:1}.cell:nth-child(3n){border-right:2px solid var(--box-line)}.cell:nth-child(9n){border-right:0}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid var(--box-line)}.cell:nth-child(n+73){border-bottom:0}.cell.peer{background:var(--peer)}.cell.same{background:var(--same)}.cell.selected{background:var(--selected);box-shadow:inset 0 0 0 2px var(--accent);z-index:1}.cell.entered{color:var(--entry)}.cell.conflict{color:var(--wrong)}.cell .pencil{display:grid;grid-template-columns:repeat(3,1fr);width:86%;height:86%;font:500 clamp(9px,1vw,12px) 'DM Sans',sans-serif;color:var(--muted);align-items:center}.board-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:17px;color:var(--muted);font-size:11px}.board-bottom>span:first-child{display:flex;align-items:center;gap:8px}.progress{height:3px;background:var(--line);margin-top:16px;border-radius:3px;overflow:hidden}.progress div{height:100%;background:var(--accent);transition:width .3s}.control-card{border:1px solid var(--line);background:var(--panel);padding:28px;border-radius:14px}.card-eyebrow{font-size:9px;letter-spacing:1.6px}.control-card h2{font:400 24px Georgia,serif;margin:12px 0 26px}.number-pad{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.number-pad button{border:1px solid var(--line);border-radius:8px;background:var(--board);padding:10px 0 8px;font:500 26px 'Manrope',sans-serif;display:flex;flex-direction:column;gap:3px;align-items:center}.number-pad button:hover{background:var(--peer);border-color:var(--muted)}.number-pad small{font:400 9px 'DM Sans',sans-serif;color:var(--muted)}.number-pad .complete{opacity:.4}.tools{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin:24px -8px}.tools button{display:flex;align-items:center;flex-direction:column;gap:6px;background:none;font-size:10px;color:var(--muted);position:relative;border-radius:6px;padding:7px 0}.tools button>span{font-size:23px;line-height:1;color:var(--text)}.tools button[aria-pressed=true]{background:var(--same);color:var(--accent)}.tools small{font-size:7px;position:absolute;top:-1px;right:0;background:var(--line);padding:2px 3px;border-radius:3px}.primary{width:100%;background:var(--accent);color:var(--accent-ink);border-radius:7px;padding:14px 18px;font-size:12px;font-weight:700;display:flex;justify-content:space-between;align-items:center}.primary:hover{filter:brightness(1.08)}.autosave{font-size:9px;text-align:center;color:var(--muted);margin:16px 0 0}.autosave span{margin-right:5px}.tip{display:flex;gap:14px;margin:25px 3px}.tip-icon{font-size:24px;color:var(--accent)}.tip h3{font-size:12px;font-weight:500;margin:0 0 8px}.tip p{font-size:11px;line-height:1.8;color:var(--muted);margin:0}.keyboard{font-size:9px;color:var(--muted);display:flex;align-items:center;justify-content:center;gap:7px}kbd{font:9px 'DM Sans',sans-serif;border:1px solid var(--line);border-radius:3px;padding:3px 4px}footer{max-width:1184px;border-top:1px solid var(--line);margin:auto;padding:25px 0 30px;display:flex;justify-content:space-between;color:var(--muted);font-size:10px}footer>span:first-child{font-size:8px;letter-spacing:1.5px}footer strong{color:var(--text);font-weight:600}.overlay{position:absolute;inset:0;border-radius:10px;background:var(--board);z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px}.overlay[hidden]{display:none}.overlay h2{font:italic 30px Georgia;margin:20px 0 30px}.overlay .primary{width:auto;min-width:190px;justify-content:center}.pause-symbol{font-size:36px;color:var(--accent)}#message{min-height:18px;font-size:12px;color:var(--accent);text-align:center;margin:18px 0 0}dialog{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:18px;padding:36px;max-width:420px;width:calc(100% - 32px);box-shadow:0 25px 100px #0005}dialog::backdrop{background:#07100dc9;backdrop-filter:blur(5px)}dialog h2{font:32px Georgia}dialog p{color:var(--muted);font-size:14px;line-height:1.6}.dialog-actions{display:flex;gap:10px;margin-top:28px}.secondary{background:transparent;border:1px solid var(--line);border-radius:7px;padding:13px 16px;white-space:nowrap;font-size:12px}.win-mark{font-size:60px;color:var(--accent)}#win{text-align:center}#win .primary{justify-content:center;margin:25px 0 12px}#win .secondary{width:100%}@media(max-width:800px){header{padding:24px}main{margin-top:28px;padding:0 24px;max-width:620px}.game-layout{grid-template-columns:1fr;gap:25px}.intro{margin-bottom:30px}.control-card{padding:20px}.control-card h2,.card-eyebrow{display:none}.number-pad{grid-template-columns:repeat(9,1fr);gap:5px}.number-pad button{font-size:22px}.number-pad small{font-size:8px}.tools{margin:18px 0}.tools button{font-size:11px}.tools small{right:calc(50% - 24px)}.cell{font-size:clamp(22px,6vw,30px)}.cell .pencil{font-size:clamp(9px,2.5vw,12px)}.keyboard{display:none}.tip{margin-bottom:0}footer{margin:0 24px}.theme span{display:none}.theme{font-size:18px;padding:8px 12px}main{margin-bottom:30px}.board-bottom{font-size:10px}.difficulty button{padding:9px 16px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}