:root{color-scheme:dark;--bg:#05090b;--panel:#06100b;--line:#1b3927;--green:#48db82;--bright:#a1ffb9;--muted:#75a883;--yellow:#d8d85a;--red:#ff6273}
*{box-sizing:border-box}[hidden]{display:none!important}
body{margin:0;min-height:100vh;background:radial-gradient(ellipse at 50% 25%,#0b1b11,#05090b 70%);color:#d9f4df;font:14px ui-monospace,SFMono-Regular,Consolas,monospace;padding:14px;display:grid;place-items:center;user-select:none}
.app{width:min(100%,1000px);min-height:min(94vh,850px);border:1px solid #15242a;background:#030809;padding:clamp(12px,2.6vw,26px);display:flex;flex-direction:column;gap:12px;position:relative}
.game-nav{position:relative;z-index:4;display:flex;align-items:center;justify-content:flex-start;gap:12px;padding:7px 10px;border:1px solid var(--line);background:#06100b}.nav-label{color:var(--green);font-size:10px;font-weight:bold;letter-spacing:.15em}.game-select{width:min(260px,65%);appearance:none;border:1px solid #285039;background:#0a1b10;color:var(--bright);font:10px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em;padding:8px 10px;cursor:pointer}.game-select:focus-visible{outline:2px solid var(--green);outline-offset:2px}.game-select option{background:#07100f;color:#d9f4df}
header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 0 10px;letter-spacing:.12em}.brand{font-size:clamp(13px,2.2vw,18px);font-weight:bold;color:var(--green)}.status{font-size:10px;color:var(--yellow);letter-spacing:.16em}.info{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:10px;letter-spacing:.08em}.info b{color:var(--bright)}
.board-wrap{flex:1;min-height:310px;display:grid;place-items:center;overflow:auto;padding:6px}.board{display:grid;align-items:stretch;justify-items:stretch;gap:3px;width:max-content;grid-template-columns:44px repeat(var(--cols),clamp(48px,8vw,82px)) 44px;grid-template-rows:repeat(var(--rows),clamp(48px,8vw,82px))}.edge{display:flex;align-items:center;justify-content:center;color:var(--yellow);font-size:clamp(9px,1.5vw,12px);font-weight:bold;letter-spacing:.08em;white-space:nowrap}.edge.src{justify-content:flex-end;padding-right:7px}.edge.dst{justify-content:flex-start;padding-left:7px}.edge .arrow{color:var(--green);padding:0 3px}.tile{width:100%;height:100%;background:#06100b;border:1px solid #173a27;padding:4px;cursor:pointer;display:grid;place-items:center;touch-action:manipulation}.tile svg{width:100%;height:100%;overflow:visible}.tile path{stroke:#328553;stroke-width:9;stroke-linecap:square;fill:none}.tile circle{fill:#328553}.board.keyboard-mode .tile.selected,.board.mouse-mode .tile:hover{border-color:var(--yellow);background:#11180d;box-shadow:0 0 16px #d8d85a20}.board.keyboard-mode .tile.selected path,.board.mouse-mode .tile:hover path{stroke:var(--green)}.board.keyboard-mode .tile.selected circle,.board.mouse-mode .tile:hover circle{fill:var(--bright)}.tile:focus-visible{outline:2px solid var(--bright);outline-offset:1px}
.hud{display:flex;align-items:center;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:10px;color:var(--muted);font-size:10px;letter-spacing:.06em}.message{min-height:15px;color:var(--yellow);font-size:10px}
.overlay{position:absolute;inset:0;background:#020607ef;display:grid;place-items:center;padding:18px;z-index:3}.card{width:min(100%,460px);background:#07100f;border:1px solid #28613c;padding:28px;text-align:center;box-shadow:0 0 40px #42ff8812}.eyebrow{font-size:10px;color:var(--green);letter-spacing:.24em}h1{font-size:clamp(23px,5vw,34px);margin:14px 0;letter-spacing:.06em;color:#d7ffe1}p{font-size:13px;color:#8bb79a;line-height:1.65;margin:0 0 22px}.go{background:var(--green);border:0;color:#041008;font:bold 12px ui-monospace,monospace;letter-spacing:.14em;padding:13px 24px;cursor:pointer}
@media(max-width:560px){body{padding:5px}.app{min-height:98vh;padding:8px;gap:9px}.board-wrap{min-height:300px}.board{gap:2px;grid-template-columns:40px repeat(var(--cols),clamp(42px,12vw,62px)) 40px;grid-template-rows:repeat(var(--rows),clamp(42px,12vw,62px))}.tile{padding:2px}.info,.hud{font-size:9px}.game-nav a{padding:7px 6px;font-size:8px}}
  .overlay.result-success{background:rgba(2,15,7,.93)}
  .overlay.result-failure{background:rgba(20,3,6,.94)}
  .overlay.result-success .card{border-color:#48db82;box-shadow:0 0 0 2px #48db8240,0 0 56px #48db8230}
  .overlay.result-failure .card{border-color:#ff6273;box-shadow:0 0 0 2px #ff627340,0 0 56px #ff627330}
  .overlay.result-success .card:before,.overlay.result-failure .card:before{display:block;padding:9px 12px;font-size:12px;font-weight:800;letter-spacing:.18em;margin-bottom:4px}
  .overlay.result-success .card:before{content:"✓  SUCCESS";color:#a1ffb9;background:#123b25;border:1px solid #48db82}
  .overlay.result-failure .card:before{content:"✕  FAILED";color:#ffc0c6;background:#401319;border:1px solid #ff6273}
  .overlay.result-success .go,.overlay.result-success .go-btn{background:#62ff91;color:#041008}
  .overlay.result-failure .go,.overlay.result-failure .go-btn{background:#ff6273;color:#190408}
 .game-nav .game-select{width:65%;max-width:260px;min-width:0;flex:0 1 260px;text-overflow:ellipsis;background-image:linear-gradient(45deg,transparent 50%,#48db82 50%),linear-gradient(135deg,#48db82 50%,transparent 50%);background-position:calc(100% - 13px) 50%,calc(100% - 8px) 50%;background-size:5px 5px;background-repeat:no-repeat;padding-right:26px}
.home-link{display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;border:1px solid #285039;background:#0a1b10;color:var(--bright);font:10px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em;padding:8px 10px;text-decoration:none;cursor:pointer}.home-link:hover,.home-link:focus-visible{border-color:var(--green);background:#102118;outline:none}
.game-nav .nav-label{margin-right:auto}