/* Exfil: a room and a route, in white ink. Luke Steuber. */
@font-face{font-family:"Plex Mono";src:url("fonts/IBMPlexMono-500.woff2") format("woff2");font-weight:500;font-display:swap}@font-face{font-family:"Plex Sans";src:url("fonts/IBMPlexSans-400.woff2") format("woff2");font-weight:400;font-display:swap}
:root{color-scheme:dark;--bg:#000;--ink:#fff;--text:#ededed;--sub:#a6a6a6;--line:#2f2f2f;--frame:#ededed;--band:rgba(255,255,255,.16);--guide:#333;--scrim:rgba(0,0,0,.8);--mono:"Plex Mono",monospace;--sans:"Plex Sans",sans-serif}
:root[data-theme=light]{color-scheme:light;--bg:#fff;--ink:#000;--text:#111;--sub:#5e5e5e;--line:#d4d4d4;--frame:#1c1c1c;--band:rgba(0,0,0,.1);--guide:#ccc;--scrim:rgba(255,255,255,.84)}
@media(prefers-color-scheme:light){:root[data-theme=system]{color-scheme:light;--bg:#fff;--ink:#000;--text:#111;--sub:#5e5e5e;--line:#d4d4d4;--frame:#1c1c1c;--band:rgba(0,0,0,.1);--guide:#ccc;--scrim:rgba(255,255,255,.84)}}
*{box-sizing:border-box;border-radius:0}body{margin:0;height:100dvh;overflow:hidden;background:var(--bg);color:var(--text);font:16px/1.45 var(--sans);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}button,select,input{font:inherit;color:inherit}button{cursor:pointer}button:disabled{opacity:.35;cursor:default}button:focus-visible,select:focus-visible{outline:2px solid var(--ink);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.readout{position:fixed;top:calc(max(0px,env(safe-area-inset-top)) + 18px);left:50%;transform:translateX(-50%);font:500 13px/1 var(--mono);letter-spacing:.02em;color:var(--sub);font-variant-numeric:tabular-nums;white-space:nowrap}
#board-shell{position:absolute;inset:54px 12px 72px;display:flex;overflow:hidden;padding:4px}.board-stage{margin:auto;display:flex;flex-direction:column;align-items:center;gap:12px;flex:none;position:relative;padding-bottom:56px}#room,#lattice{display:block;flex:none;overflow:visible}#room{pointer-events:none}#lattice{touch-action:manipulation}.node-button{display:block;width:100%;height:100%;border:0;border-radius:50%;background:transparent;padding:0;touch-action:manipulation}.node-button:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}.edge{stroke:var(--guide);stroke-width:1;fill:none}.edge.chosen{stroke:var(--ink);stroke-width:2}.node-circle{fill:var(--bg);stroke:var(--line);stroke-width:1}.arrow{stroke:var(--sub);stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round}.node.available .node-circle{stroke:var(--ink);stroke-width:1.5}.node.available .arrow{stroke:var(--ink)}.node.chosen .node-circle{stroke:var(--ink);fill:var(--ink)}.node.chosen .arrow{stroke:var(--bg)}.node.refused .node-circle{stroke:var(--ink);stroke-dasharray:3 3}.hint-ring{fill:none;stroke:var(--ink);stroke-width:1.5}.hint-ring.wrong{stroke-dasharray:3 3}.frame{stroke:var(--ink);stroke-width:1.5;fill:none}.guide{fill:var(--sub);opacity:.55}.block{fill:var(--sub)}.key,.door{fill:none;stroke:var(--ink);stroke-width:1;transition:opacity .3s}.door{stroke-dasharray:3 3}.key.taken,.door.open{opacity:0}.trail{fill:none;stroke:var(--ink);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.start-ring{fill:var(--bg);stroke:var(--ink);stroke-width:1}.dot{fill:var(--ink);stroke:var(--ink);stroke-width:1}.dot.out{fill:var(--bg);stroke-width:1}.entry{fill:var(--ink)}
.toolbar #undo-btn.nudge{color:var(--ink);animation:undo-nudge 1.6s ease-in-out infinite}@keyframes undo-nudge{50%{transform:scale(1.18)}}
#feedback{position:fixed;bottom:64px;left:16px;right:16px;margin:0;text-align:center;color:var(--sub);font:14px/1.3 var(--sans);pointer-events:none}.toolbar{position:fixed;bottom:max(6px,env(safe-area-inset-bottom));left:8px;right:8px;display:flex;justify-content:space-between}.toolbar>div{display:flex}.ib{display:inline-grid;place-items:center;width:48px;height:48px;min-width:48px;min-height:48px;border:0;background:none;padding:12px;color:var(--ink);transition:opacity .15s,transform .1s}.ib svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.ib:active{transform:scale(.94)}
.toolbar .ib{color:var(--sub)}.toolbar .ib:hover,.toolbar .ib:focus-visible{color:var(--ink)}#restart-btn{position:fixed;top:max(0px,env(safe-area-inset-top));left:8px;color:var(--sub);z-index:2}#restart-btn:hover,#restart-btn:focus-visible{color:var(--ink)}
/* As in Slant and Akari, the finished-board actions appear right below the play area, in room the stage always keeps
   for them, so nothing moves when a board is solved. A milestone line sits under them. */
.completion{position:absolute;top:calc(100% - 48px);left:0;right:0;height:48px;display:flex;justify-content:center;gap:12px;animation:next-reveal .45s .15s both}.completion[hidden],#share-btn[hidden]{display:none}@keyframes next-reveal{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
.milestone{position:absolute;top:100%;left:50%;transform:translateX(-50%);margin:0;white-space:nowrap;text-align:center;color:var(--sub);font:14px/1.3 var(--sans);pointer-events:none}.milestone[hidden]{display:none}
/* A phone on its side: the toolbar becomes a column on the right, as in the rest of the set, and the play area gets the height. */
@media(orientation:landscape) and (max-height:500px){#board-shell{inset:40px 72px 12px 12px}.toolbar{left:auto;right:8px;top:12px;bottom:12px;flex-direction:column;width:48px}.toolbar>div{flex-direction:column}#feedback{left:12px;right:72px;bottom:4px;background:var(--bg);font-size:12px}.readout{left:calc(50% - 32px)}}
.sheet{width:min(32rem,calc(100vw - 16px));max-height:calc(100dvh - 16px);border:1px solid var(--frame);padding:0;background:var(--bg);color:var(--text)}.sheet[open]{display:flex;flex-direction:column}.sheet::backdrop{background:var(--scrim)}.sheet-head{display:flex;justify-content:space-between;align-items:center;padding:8px 16px;gap:12px;flex:none;border-bottom:1px solid var(--line)}h2{font:500 16px/1.3 var(--mono);margin:0}.sheet-head form{margin:0}.sheet-x{width:44px;height:44px;min-width:44px;min-height:44px;padding:10px}.sheet-body{padding:20px 24px;overflow:auto;min-height:0;overscroll-behavior:contain;scroll-padding:12px}.sheet-body p{max-width:60ch;margin:0 0 16px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px;border-bottom:1px solid var(--line)}.row select{max-width:65%;min-height:44px;background:var(--bg);border:0;padding:4px 8px}.row button{min-height:44px;background:none;border:0;padding:8px}.row button:not(:disabled){text-decoration:underline;text-underline-offset:4px}.quiet{color:var(--sub);font:13px/1.4 var(--mono);overflow-wrap:anywhere;margin-top:8px}.sheet-foot{padding:12px 24px;border-top:1px solid var(--line);flex:none;color:var(--sub);font-size:14px}.sheet-foot a{color:inherit}#settings-feedback a{overflow-wrap:anywhere}
.text-action{min-height:44px;padding:8px 12px;border:1px solid var(--line);background:none;font:500 14px/1.3 var(--mono);color:var(--text)}.text-action:focus-visible,.sheet summary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.controls{border-top:1px solid var(--line);padding-top:16px}.controls p{margin:0 0 6px}.help-more{border-top:1px solid var(--line);margin-top:16px;padding-top:4px}.help-more summary{cursor:pointer;min-height:44px;padding:12px 0;color:var(--sub)}.help-more p{font-size:14px}.sheet-body .help-more p:last-child{margin-bottom:0}
@media(max-width:480px){.sheet-head{padding:8px 12px}.sheet-body{padding:16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.toolbar #undo-btn.nudge{outline:1px solid var(--ink);outline-offset:-7px}}:root[data-motion=reduce] *,:root[data-motion=reduce] *::before,:root[data-motion=reduce] *::after{animation:none!important;transition:none!important}:root[data-motion=reduce] .toolbar #undo-btn.nudge{outline:1px solid var(--ink);outline-offset:-7px}
@media(forced-colors:active){:root,:root[data-theme]{--bg:Canvas;--ink:CanvasText;--text:CanvasText;--sub:GrayText;--line:GrayText;--guide:GrayText;--frame:CanvasText;--scrim:Canvas}#room,#lattice{forced-color-adjust:none}.toolbar .ib,#restart-btn{color:ButtonText}.sheet{border-color:CanvasText}.node-button:focus-visible{outline-color:Highlight}}
#board-shell,#board-shell *,header,.toolbar,.toolbar *,button,button *{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}