:root{color-scheme:dark;--paper:#080808;--ink:#f5f0e5;--muted:#bdb49f;--gold:#d9bc78;--gold-soft:#f0d99b;--line:#51452d;--spring:cubic-bezier(.22,1.35,.42,1);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}body{margin:0;min-height:100svh;background:radial-gradient(circle at 50% 25%,#2f261033,transparent 40%),#080808;-webkit-tap-highlight-color:transparent}button,a,input,select{touch-action:manipulation}button,input,select{font:inherit}button{color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold-soft);outline-offset:3px}
.home-bar{position:sticky;top:0;z-index:30;display:flex;width:100%;min-height:calc(52px + env(safe-area-inset-top));align-items:center;justify-content:center;gap:10px;border-bottom:1px solid #f4dfa5;background:linear-gradient(110deg,#b18a38,#f0d98e 48%,#b18a38);color:#090806;padding-top:env(safe-area-inset-top);box-shadow:0 8px 28px #0009,inset 0 1px #fff8;font-size:.88rem;font-weight:850;letter-spacing:.16em;text-transform:uppercase}.home-bar:before{content:"←";font-size:1.15rem;transition:transform .2s}.home-bar:hover:before{transform:translateX(-3px)}
.game-shell{width:min(100%,480px);height:calc(100svh - 52px - env(safe-area-inset-top));min-height:590px;margin-inline:auto;padding:16px 18px calc(8px + env(safe-area-inset-bottom));display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.game-identity{min-width:0;display:flex;flex-direction:column;gap:3px}.game-identity h1{margin:0;color:var(--gold);font:500 31px/1 Georgia,serif;letter-spacing:-1px;white-space:nowrap}.player-name{max-width:165px;overflow:hidden;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.12em;text-overflow:ellipsis;text-transform:uppercase;white-space:nowrap}.player-name:empty{display:none}.top-actions{display:flex;gap:4px}.icon-button{display:grid;width:39px;height:39px;place-items:center;flex:0 0 39px;border:1px solid #554625;border-radius:50%;background:#15130e;color:#ecd59c;font-size:22px;line-height:1;transition:transform .25s var(--spring),background .2s}.icon-button:hover{background:#292319}.icon-button:active{transform:scale(.91)}.info-icon{font:italic 700 20px Georgia,serif}
.scorebar{display:grid;grid-template-columns:repeat(3,1fr);margin-bottom:11px;padding-bottom:10px;border-bottom:1px solid var(--line)}.scorebar>div{text-align:center;border-right:1px solid var(--line)}.scorebar>div:last-child{border:0}.scorebar span{display:block;color:var(--muted);font-size:10px;font-weight:750;letter-spacing:1.3px}.scorebar strong{font-size:24px;font-weight:550;font-variant-numeric:tabular-nums}.play-area{position:relative;display:flex;flex:1;min-height:0;flex-direction:column;align-items:center}.mode-line{display:flex;width:100%;justify-content:space-between;gap:12px;color:var(--gold-soft);font-size:11px;font-weight:800;letter-spacing:.05em;text-transform:uppercase}.mode-line span:last-child{color:var(--muted)}.message{min-height:23px;margin:7px 0 10px;color:#ddd3bd;text-align:center;font-size:14px;line-height:1.4}
.board{--size:3;display:grid;grid-template-columns:repeat(var(--size),1fr);grid-template-rows:repeat(var(--size),1fr);gap:clamp(6px,2vw,10px);width:min(100%,calc(100svh - 310px),430px);aspect-ratio:1;padding:clamp(8px,2.4vw,13px);border:1px solid #6d5931;border-radius:24px;background:linear-gradient(145deg,#171510,#0c0c0b);box-shadow:0 22px 70px #000a,inset 0 1px #ffe5a51f}.cell{position:relative;display:grid;min-width:0;min-height:0;place-items:center;border:1px solid #5c4b2b;border-radius:clamp(10px,3vw,17px);background:linear-gradient(145deg,#171613,#0d0d0c);box-shadow:inset 0 1px #fff1b00c,0 5px 12px #0007;color:var(--ink);font:400 clamp(46px,18vw,88px)/.75 Georgia,serif;transition:transform .23s var(--spring),border-color .2s,background .2s,box-shadow .2s}.board[data-size='4'] .cell{font-size:clamp(38px,13vw,72px)}.board[data-size='5'] .cell{border-radius:clamp(7px,2vw,12px);font-size:clamp(30px,10vw,56px)}.cell:hover:not(:disabled){border-color:#c9a95c;background:#211d14}.cell:active:not(:disabled){transform:scale(.94)}.cell.is-x{color:#f5f0e5;text-shadow:0 0 24px #fff2}.cell.is-o{color:var(--gold);text-shadow:0 0 24px #d9bc7844}.cell.is-placed{animation:mark-in .42s var(--spring)}.cell.is-winning{border-color:#f6dda0;background:radial-gradient(circle,#6f572655,#17140d 70%);box-shadow:0 0 22px #d9bc7855,inset 0 0 15px #d9bc7822}.cell:disabled{cursor:default}.thinking{display:flex;min-height:25px;align-items:center;gap:5px;margin-top:9px;color:var(--muted);font-size:11px;font-weight:750;letter-spacing:.05em;text-transform:uppercase}.thinking span{width:5px;height:5px;border-radius:50%;background:var(--gold);animation:thinking 1s infinite ease-in-out}.thinking span:nth-child(2){animation-delay:.14s}.thinking span:nth-child(3){animation-delay:.28s}.thinking b{margin-left:4px;font:inherit}.ad-reservation{display:grid;min-height:32px;place-items:center;margin-top:7px;border:1px dashed #41371f;border-radius:9px;color:#6e6759;font-size:8px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
dialog{width:min(calc(100% - 28px),430px);max-height:calc(100dvh - 28px);margin:auto;overflow:auto;border:1px solid #9a7b3b;border-radius:20px;background:linear-gradient(145deg,#191713,#090909 70%);color:var(--ink);padding:22px;box-shadow:0 32px 110px #000e}dialog::backdrop{background:#000c;backdrop-filter:blur(8px)}.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px}.dialog-top h2,dialog h2{margin:0;color:var(--gold-soft);font:400 31px/1.05 Georgia,serif}.dialog-top .eyebrow{margin:0}.dialog-top .icon-button{width:38px;height:38px;font-size:17px}fieldset{margin:0 0 16px;padding:0;border:0}legend,.field-label{display:block;margin-bottom:9px;color:var(--gold-soft);font-size:13px;font-weight:800;letter-spacing:.04em}.choice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.choice-grid label{cursor:pointer}.choice-grid input{position:absolute;opacity:0;pointer-events:none}.choice-grid span{display:grid;min-height:67px;place-items:center;border:1px solid #554625;border-radius:11px;background:#11100d;color:var(--ink);font-size:17px;font-weight:800}.choice-grid small{color:var(--muted);font-size:8px;font-weight:600;text-align:center}.choice-grid input:checked+span{border-color:var(--gold);background:#d9bc7818;box-shadow:inset 0 0 0 1px #d9bc7855}.choice-grid input:focus-visible+span{outline:3px solid var(--gold-soft);outline-offset:3px}select{width:100%;min-height:47px;margin-bottom:11px;border:1px solid #6e5c35;border-radius:10px;background:#10100f;color:var(--ink);padding:8px 11px}.switch-row{display:flex;min-height:51px;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);font-size:14px;cursor:pointer}.switch-row input{appearance:none;position:relative;width:40px;height:24px;margin:0;flex:0 0 40px;border:1px solid #8e836d;border-radius:20px;background:#39372f}.switch-row input:before{content:"";position:absolute;width:16px;height:16px;top:3px;left:3px;border-radius:50%;background:#f5f0e5;transition:transform .2s}.switch-row input:checked{background:var(--gold);border-color:var(--gold)}.switch-row input:checked:before{transform:translateX(16px);background:#111}.primary-button{display:flex;width:100%;min-height:49px;align-items:center;justify-content:center;border:1px solid var(--gold);border-radius:11px;background:var(--gold);color:#0a0906;font-weight:800}.primary-button:hover{background:var(--gold-soft)}#settings-form>.primary-button{margin-top:16px}.secondary-button{min-height:48px;border:1px solid #8f7543;border-radius:10px;background:transparent;padding:8px 12px}.dialog-buttons{display:flex;gap:8px;margin-top:22px}.dialog-buttons .primary-button{flex:1}.eyebrow{margin:0 0 9px;color:var(--gold);font-size:12px;font-weight:800;letter-spacing:1.5px}.record-panel{padding:14px;border:1px solid #4e422a;border-radius:12px;background:#090909}.record-grid{display:grid;grid-template-columns:1fr auto;gap:9px;color:#c9c0ae;font-size:13px}.record-grid strong{color:var(--gold-soft);font-size:14px;text-align:right}.dialog-note{margin:10px 0 0;color:var(--muted);font-size:12px;line-height:1.5}.rules h3{margin:22px 0 8px;color:var(--gold-soft);font:400 24px/1.1 Georgia,serif}.rules p,dialog>p{color:#d6cebd;font-size:14px;line-height:1.55}.control-rule{display:flex;align-items:flex-start;gap:12px;margin:12px 0}.control-rule p{margin:5px 0}.control-symbol{flex:0 0 36px;height:36px;display:grid;place-items:center;border:1px solid #554625;border-radius:50%;background:#15130e;color:#ecd59c;font-size:22px}.sound-muted{opacity:.55}.info-control{font:italic 700 18px Georgia,serif}.result-dialog{text-align:center}.result-mark{display:grid;width:78px;height:78px;place-items:center;margin:8px auto 16px;border:1px solid var(--gold);border-radius:50%;color:var(--gold);font:400 68px/.7 Georgia,serif;box-shadow:0 0 35px #d9bc7844}.result-dialog h2{font-size:36px}.result-dialog .primary-button{margin-top:20px}.reduced-motion *,.reduced-motion *:before,.reduced-motion *:after{animation:none!important;transition-duration:.01ms!important}
@keyframes mark-in{0%{transform:scale(.3) rotate(-12deg);opacity:0}65%{transform:scale(1.12) rotate(2deg)}100%{transform:scale(1);opacity:1}}@keyframes thinking{0%,80%,100%{transform:translateY(0);opacity:.4}40%{transform:translateY(-4px);opacity:1}}
@media(max-width:375px){.game-shell{padding-inline:11px}.game-identity h1{font-size:27px}.top-actions{gap:2px}.icon-button{width:36px;flex-basis:36px}.board{width:min(100%,calc(100svh - 302px));padding:7px}.message{font-size:13px}}
@media(max-height:720px){.game-shell{min-height:520px;padding-top:8px}.topbar{margin-bottom:8px}.scorebar{margin-bottom:7px;padding-bottom:6px}.message{margin-block:4px 6px}.board{width:min(100%,calc(100svh - 270px),390px)}.thinking{margin-top:4px}.ad-reservation{min-height:25px}}
@media(min-width:700px) and (orientation:portrait){.game-shell{width:min(100%,760px);padding:24px 34px 14px}.game-identity h1{font-size:43px}.topbar{margin-bottom:22px}.icon-button{width:46px;height:46px;flex-basis:46px}.scorebar span{font-size:12px}.scorebar strong{font-size:30px}.mode-line{font-size:14px}.message{font-size:17px;margin:12px 0 16px}.board{width:min(88vw,620px,calc(100svh - 330px));gap:14px;padding:16px}.thinking{font-size:13px;margin-top:14px}.ad-reservation{min-height:42px}}
@media(min-width:800px) and (orientation:landscape){.game-shell{width:min(100%,940px);display:grid;grid-template-columns:280px minmax(0,1fr);grid-template-rows:auto auto 1fr auto;column-gap:32px}.topbar{grid-column:1/-1}.scorebar{grid-column:1;align-self:start;margin-top:75px}.play-area{grid-column:2;grid-row:2/4}.board{width:min(62vh,520px)}.ad-reservation{grid-column:1;grid-row:4;align-self:end}.scorebar{grid-template-columns:1fr}.scorebar>div{padding:14px;border-right:0;border-bottom:1px solid var(--line)}.scorebar>div:last-child{border:0}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition-duration:.01ms!important}}