:root{--x:#38bdf8;--o:#fb7185;--x-glow:#38bdf88c;--o-glow:#fb71858c;--radius-card:26px;--radius-cell:17px;--ease:cubic-bezier(.22, 1, .36, 1);--ease-back:cubic-bezier(.34, 1.56, .64, 1);--font:ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, "Helvetica Neue", Arial, sans-serif}[data-theme=dark]{--bg:#08080c;--text:#f2f2f6;--muted:#8f8fa0;--surface:#ffffff09;--surface-hi:#ffffff12;--border:#ffffff17;--border-hi:#ffffff29;--card:#ffffff07;--shadow:0 30px 70px -25px #000000e6;--glow-a:#38bdf829;--glow-b:#fb718524}[data-theme=light]{--bg:#f4f5f9;--text:#14141c;--muted:#67677a;--surface:#ffffffe6;--surface-hi:#fff;--border:#12122217;--border-hi:#1212222e;--card:#ffffffb8;--shadow:0 30px 60px -30px #14142d59;--glow-a:#38bdf84d;--glow-b:#fb718542;--x:#0284c7;--o:#e11d48}*,:before,:after{box-sizing:border-box}html,body{height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;place-items:center;margin:0;padding:clamp(.75rem,3vw,2rem);display:grid;overflow-x:hidden}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:none}:focus-visible{outline:2px solid var(--x);outline-offset:3px;border-radius:6px}.glow{pointer-events:none;z-index:0;background:radial-gradient(46rem 46rem at 18% 8%, var(--glow-a), transparent 60%), radial-gradient(40rem 40rem at 85% 92%, var(--glow-b), transparent 62%);position:fixed;inset:0}.app{z-index:1;border-radius:var(--radius-card);background:var(--card);border:1px solid var(--border);width:min(100%,25.5rem);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(20px)saturate(1.4);backdrop-filter:blur(20px)saturate(1.4);animation:rise .55s var(--ease) both;flex-direction:column;gap:clamp(.9rem,2.6vw,1.35rem);padding:clamp(1.1rem,4vw,1.85rem);display:flex;position:relative}@keyframes rise{0%{opacity:0;transform:translateY(14px)scale(.985)}}.masthead{justify-content:space-between;align-items:center;display:flex}.wordmark{letter-spacing:-.03em;margin:0;font-size:1.4rem;font-weight:700}.wordmark span{background:linear-gradient(100deg, var(--x), var(--o));color:#0000;-webkit-background-clip:text;background-clip:text}.icon-btn{width:2.1rem;height:2.1rem;color:var(--muted);border:1px solid var(--border);transition:color .2s, border-color .2s, transform .2s var(--ease-back);border-radius:50%;place-items:center;display:grid}.icon-btn:hover{color:var(--text);border-color:var(--border-hi);transform:rotate(-18deg)}.icon-btn svg{fill:none;stroke:currentColor;stroke-width:1.7px;stroke-linecap:round}[data-theme=dark] .icon-sun,[data-theme=light] .icon-moon{display:none}.controls{flex-direction:column;gap:.5rem;display:flex}.segmented{background:var(--surface);border:1px solid var(--border);border-radius:12px;grid-auto-columns:1fr;grid-auto-flow:column;gap:2px;padding:3px;display:grid}.segmented button{color:var(--muted);border-radius:9px;padding:.44rem .3rem;font-size:.79rem;font-weight:550;transition:color .18s,background-color .18s}.segmented button:hover{color:var(--text)}.segmented button[aria-checked=true]{color:var(--text);background:var(--surface-hi);box-shadow:0 1px 3px #00000029}#difficulty{transition:opacity .25s var(--ease), transform .25s var(--ease)}#difficulty[data-hidden=true]{opacity:0;pointer-events:none;transform:translateY(-4px)}.scoreboard{text-align:center;grid-template-columns:repeat(3,1fr);gap:.4rem;display:grid}.score{background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:.5rem .25rem}.score-label{text-transform:uppercase;letter-spacing:.09em;color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:.66rem;display:block;overflow:hidden}.score-value{font-variant-numeric:tabular-nums;margin-top:.1rem;font-size:1.22rem;font-weight:700;line-height:1.1;display:block}.score-x .score-value{color:var(--x)}.score-o .score-value{color:var(--o)}.score-value.bump{animation:bump .42s var(--ease-back)}@keyframes bump{40%{transform:scale(1.32)}}.board-wrap{position:relative}.board{grid-template-columns:repeat(3,1fr);gap:clamp(.4rem,1.8vw,.6rem);display:grid}.cell{aspect-ratio:1;border-radius:var(--radius-cell);background:var(--surface);border:1px solid var(--border);transition:background-color .2s, border-color .2s, transform .2s var(--ease);place-items:center;padding:14%;display:grid;position:relative}.cell[data-playable=true]:hover{background:var(--surface-hi);border-color:var(--border-hi);transform:translateY(-2px)}.cell[data-playable=true]:active{transform:translateY(0)scale(.97)}.cell[data-playable=false]{cursor:default}.cell svg{fill:none;stroke-linecap:round;stroke-width:11px;width:100%;height:100%;overflow:visible}.mark-x{stroke:var(--x);filter:drop-shadow(0 0 9px var(--x-glow))}.mark-o{stroke:var(--o);filter:drop-shadow(0 0 9px var(--o-glow))}.cell svg [pathLength]{stroke-dasharray:1;stroke-dashoffset:1px;animation:draw .32s var(--ease) forwards}.cell svg [pathLength]:nth-child(2){animation-delay:.11s}@keyframes draw{to{stroke-dashoffset:0}}.ghost{opacity:0;transition:opacity .18s;position:absolute;inset:14%}.cell[data-playable=true]:hover .ghost,.cell[data-playable=true]:focus-visible .ghost{opacity:.2}.ghost svg [pathLength]{stroke-dashoffset:0;animation:none}.ghost svg{filter:none}.cell[data-win=true]{animation:winpulse 1.5s var(--ease) infinite;border-color:#0000}@keyframes winpulse{50%{background:var(--surface-hi)}}.board[data-result=win] .cell:not([data-win=true]) svg{opacity:.28;filter:none;transition:opacity .4s}.board[data-result=draw] .cell svg{filter:none;transition:filter .4s}.strike{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.strike line{stroke:currentColor;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1px}.strike.is-x{color:var(--x)}.strike.is-o{color:var(--o)}.strike[data-show=true] line{animation:draw .42s .18s var(--ease) forwards}.status{text-align:center;min-height:1.4em;color:var(--muted);margin:0;font-size:.92rem;font-weight:550}.status.shift{animation:shift .3s var(--ease)}@keyframes shift{0%{opacity:0;transform:translateY(5px)}}.status b{font-weight:700}.status .is-x{color:var(--x)}.status .is-o{color:var(--o)}.primary{color:var(--bg);background:linear-gradient(100deg, var(--x), var(--o));transition:transform .2s var(--ease-back), filter .2s;animation:rise .32s var(--ease) both;border-radius:13px;padding:.68rem;font-size:.9rem;font-weight:650}[data-theme=light] .primary{color:#fff}.primary:hover{filter:brightness(1.08);transform:translateY(-2px)}.primary:active{transform:translateY(0)}.primary[hidden]{display:none}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.cell svg [pathLength],.strike line{stroke-dashoffset:0}}