/* Slider presentation adapter. Game state is owned by the shared control plane. */
:root{color-scheme:light;--paper:#f6f5f0;--ink:#29322c;--muted:#687064;--line:#dce0d5;--accent:#40563f;--soft:#e7ebdf;--board-width:min(560px,calc(100dvh - 288px));font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-synthesis:none;color:var(--ink);background:var(--paper);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}body{margin:0;padding:0 20px 24px}button,select,summary,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button,select{font:inherit;color:inherit}button,select,summary{cursor:pointer}button{border:0;background:none}button:disabled{cursor:default;opacity:.38}a{color:inherit}p,h1,h2{margin:0}button,select,summary{min-height:44px}button:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button:disabled{pointer-events:none}.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip-link{position:fixed;z-index:30;top:8px;left:12px;padding:12px 16px;background:var(--paper);border:1px solid var(--ink)}.skip-link:not(:focus){clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap;padding:0;border:0}
.site-header,.workspace{width:100%;max-width:var(--board-width);margin:0 auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:20px 0 16px;min-height:80px}h1{font-size:23px;letter-spacing:-.8px;font-weight:600;line-height:1.2}#game-menu{font-size:13px}#game-menu button,#game-menu summary,#game-menu select{font:inherit;color:var(--muted)}#game-menu a{display:block;padding:10px 12px;min-height:44px;text-decoration:none}#game-menu details{position:relative}#game-menu summary{display:flex;align-items:center;justify-content:center;padding:0 8px;list-style:none;border-radius:6px}#game-menu summary::-webkit-details-marker{display:none}#game-menu summary::after{content:'⌄';font-size:15px;margin-left:7px;margin-top:-4px}#game-menu details>div,#game-menu details>ul{position:absolute;z-index:20;right:0;top:100%;background:var(--paper);border:1px solid var(--line);box-shadow:0 8px 30px #29322c14;border-radius:10px;min-width:160px;padding:6px;list-style:none;margin:4px 0 0}#game-menu a:hover{background:var(--soft);border-radius:5px}#game-menu [aria-current=page]{font-weight:600;color:var(--accent)}
.puzzle-options{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.picture-picker{min-width:0;flex:1}.picture-picker select{width:100%;max-width:180px;border:0;border-radius:5px;background:transparent;padding:0 22px 0 1px;font-size:14px;font-weight:500;letter-spacing:-.1px}.size-control{display:flex;gap:2px;border-radius:7px;background:var(--soft);padding:3px;flex-shrink:0}.size-control button{min-width:49px;padding:0 7px;border-radius:5px;font-size:12px;color:var(--muted);transition:background .15s,color .15s}.size-control button[aria-pressed=true]{background:#fffef9;color:var(--ink);box-shadow:0 1px 3px #29322c12}.size-control button:hover{color:var(--ink)}
.board-frame{position:relative;padding:5px;background:#e0e4d7;border:1px solid #d4daca;border-radius:5px}.board{--n:4;position:relative;width:100%;aspect-ratio:1;background:#e0e4d7;border-radius:1px;isolation:isolate;touch-action:none;overflow:hidden}.board:focus-visible{outline-offset:9px}.tile{position:absolute;z-index:2;left:0;top:0;width:calc(100% / var(--n));height:calc(100% / var(--n));min-height:0;padding:1px;transform:translate(calc(var(--x) * 100%),calc(var(--y) * 100%));transition:transform 160ms cubic-bezier(.22,.68,.32,1),opacity .3s;cursor:default;outline-offset:-5px!important;border-radius:0!important;will-change:transform}.tile-face{position:relative;display:block;width:100%;height:100%;background-size:calc(var(--n) * 100%) calc(var(--n) * 100%);background-repeat:no-repeat;border-radius:1px;overflow:hidden;transition:filter .18s}.tile.movable{cursor:pointer}.tile.movable:hover .tile-face{filter:brightness(1.065)}.tile.movable:active .tile-face{filter:brightness(.94)}.tile:focus-visible{z-index:4;outline:3px solid #fffef9;box-shadow:inset 0 0 0 5px var(--accent)}.tile-number{position:absolute;top:7px;left:7px;display:grid;place-items:center;min-width:23px;height:23px;padding:0 4px;background:#fffef5ed;color:#344530;border-radius:3px;font-size:11px;font-weight:600;font-variant-numeric:tabular-nums;opacity:0;transition:opacity .15s}.numbers-on .tile-number{opacity:1}.empty-tile{position:absolute;left:0;top:0;width:calc(100% / var(--n));height:calc(100% / var(--n));transform:translate(calc(var(--x) * 100%),calc(var(--y) * 100%));background:#e0e4d7;z-index:0}.empty-tile:after{content:'';position:absolute;inset:12px;border:1px solid #cad2bd;border-radius:2px}.completed-picture{position:absolute;z-index:3;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;pointer-events:none;transition:opacity .5s ease}.complete .completed-picture{opacity:1}.complete .tile{opacity:0;pointer-events:none}.board-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:12px;background:#eeeee5f5;z-index:5;font-size:13px;color:var(--muted)}.board-loading[hidden]{display:none}.loading-mark{width:18px;height:18px;border:1.5px solid #c4cbbc;border-top-color:var(--accent);border-radius:50%;animation:turn 1.1s linear infinite}@keyframes turn{to{transform:rotate(360deg)}}
.scorebar{display:flex;align-items:center;justify-content:space-between;padding:13px 1px;gap:12px;min-height:43px}.score{display:flex;align-items:baseline;gap:5px;font-size:12px;color:var(--muted)}.score strong{font-weight:500;color:var(--ink);font-size:13px;font-variant-numeric:tabular-nums}.score-time{min-width:50px;justify-content:flex-end}.score-time strong{color:var(--muted)}.board-state{font-size:12px;color:var(--accent);text-align:center}.action-row{display:flex;align-items:center;gap:6px}.primary,.action-button{min-height:44px;min-width:64px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:6px;font-size:13px;line-height:1.25;white-space:nowrap}.primary{background:var(--accent);color:#fffef9;font-weight:500}.primary:hover{background:#30462f}.action-button:not(:disabled):hover,summary:hover{background:var(--soft)}.more{position:relative;margin-left:auto}.more>summary{display:flex;align-items:center;justify-content:center;gap:8px;min-width:76px;padding:0 10px;border-radius:6px;font-size:13px;list-style:none}.more>summary::-webkit-details-marker{display:none}.more>summary span{font-size:15px;margin-top:-4px}.more[open]>summary{background:var(--soft)}.more-options{position:absolute;bottom:calc(100% + 8px);right:0;z-index:10;width:190px;background:#fbfbf6;border:1px solid var(--line);border-radius:10px;padding:6px;box-shadow:0 8px 30px #29322c1c}.more-options .action-button{display:flex;width:100%;justify-content:space-between;padding:0 12px;text-align:left;font-size:13px}.numbers-toggle[aria-pressed=true]{color:var(--accent)}.toggle-track{width:26px;height:16px;border-radius:10px;background:#ccd3c2;padding:3px}.toggle-track i{display:block;width:10px;height:10px;border-radius:50%;background:#fff;transition:transform .15s}.numbers-toggle[aria-pressed=true] .toggle-track{background:var(--accent)}.numbers-toggle[aria-pressed=true] .toggle-track i{transform:translateX(10px)}.solve-button[aria-pressed=true]{background:var(--soft)}.feedback-area{padding-top:13px}.board-instruction{font-size:12px;line-height:1.6;color:var(--muted);text-align:center}.error-message{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;line-height:1.5;color:#793c2a;background:#f0e4d9;padding:8px 12px;margin-top:12px;border-radius:6px}.error-message[hidden]{display:none}.error-message button{flex-shrink:0;font-size:12px;font-weight:600;min-width:64px}
dialog{padding:20px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:12px;max-height:calc(100dvh - 32px);max-width:calc(100vw - 32px);box-shadow:0 24px 100px #1d28162c}dialog::backdrop{background:#26322170;backdrop-filter:blur(4px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.dialog-heading h2{font-size:20px;font-weight:500;letter-spacing:-.5px;line-height:1.2}.close-dialog{min-width:60px;border-radius:5px;font-size:13px;padding:0 9px}.close-dialog:hover{background:var(--soft)}.preview-dialog{width:min(560px,calc(100vw - 32px))}.preview-dialog img{display:block;width:100%;max-height:calc(100dvh - 180px);object-fit:contain;aspect-ratio:1;background:#e0e4d7}.dialog-caption{font-size:12px;color:var(--muted);text-align:center;line-height:1.5;margin-top:13px}.help-dialog{width:440px;font-size:14px;line-height:1.65}.help-dialog ul{padding-left:20px;margin:18px 0}.help-dialog li+li{margin-top:12px}.help-note{color:var(--muted);font-size:12px;border-top:1px solid var(--line);padding-top:14px}.noscript-message{position:fixed;inset:auto 16px 16px;padding:18px;background:#f3e1d2;border:1px solid #cfab8f;border-radius:6px;z-index:30;font-size:14px;line-height:1.5}
@media(max-width:600px){:root{--board-width:500px}body{padding:0 16px 20px}.site-header{padding:14px 0 10px;min-height:68px}.puzzle-options{gap:8px;margin-bottom:10px}.picture-picker select{font-size:13px}.size-control button{min-width:46px}.tile-number{top:5px;left:5px;min-width:20px;height:20px;font-size:10px}.empty-tile:after{inset:9px}}
@media(max-width:350px){.size-control button{min-width:44px;padding:0 4px}.picture-picker select{font-size:12px;padding-right:0}.tile-number{top:3px;left:3px;min-width:18px;height:18px}.board-instruction{font-size:11px}}
/* Keep the board and its essential actions visible on short landscape screens. */
@media(max-height:540px) and (min-width:600px){:root{--board-width:calc(100dvh - 32px)}body{padding:16px 20px}.site-header{position:absolute;left:28px;top:17px;bottom:17px;width:150px;max-width:none;margin:0;padding:0;display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between;min-height:0}.workspace{max-width:calc(100dvh + 170px);margin:0 0 0 auto}.play-column{display:grid;grid-template-columns:minmax(240px,calc(100dvh - 32px)) 150px;grid-template-rows:auto 1fr auto auto;column-gap:18px;align-items:start}.board-frame{grid-column:1;grid-row:1/5}.puzzle-options{grid-column:2;display:flex;flex-direction:column;align-items:stretch;gap:5px;margin:0}.picture-picker select{max-width:none}.size-control{width:fit-content}.size-control button{min-width:44px}.scorebar{grid-column:2;flex-wrap:wrap;padding:15px 0 0;gap:8px}.board-state{order:3;width:100%;text-align:left}.action-row{grid-column:2;flex-wrap:wrap;gap:4px}.action-row>.primary,.action-row>.action-button{flex:1;min-width:60px;padding:0 10px}.more{width:100%;margin:0}.more>summary{justify-content:space-between}.more-options{width:170px;right:0}.feedback-area{grid-column:2;padding-top:8px}.board-instruction{text-align:left;font-size:11px}.error-message{flex-wrap:wrap}.site-header #game-menu details>div,.site-header #game-menu details>ul{left:0;right:auto;top:auto;bottom:100%;max-height:calc(100dvh - 82px);overflow:auto}}
@media(max-height:540px) and (min-width:600px) and (max-width:780px){.site-header{left:16px;width:80px}.workspace{max-width:calc(100vw - 122px)}.play-column{grid-template-columns:minmax(225px,calc(100dvh - 32px)) 142px;column-gap:12px}.size-control button{min-width:44px;padding:0 3px}h1{font-size:21px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition:none!important;scroll-behavior:auto!important}.tile{will-change:auto}dialog::backdrop{backdrop-filter:none}}
@media(forced-colors:active){.tile-face,.tile-number{forced-color-adjust:none}.size-control button[aria-pressed=true],.numbers-toggle[aria-pressed=true]{outline:2px solid Highlight}.toggle-track{outline:1px solid ButtonText}.primary,.board-frame{border:1px solid ButtonText}.empty-tile{background:Canvas}.empty-tile:after{border-color:ButtonText}}

.action-button.help-button{min-width:44px;width:44px;padding:0;font-size:18px;font-weight:500}

#game-menu .journal-detail{border-top:1px solid var(--line);font-size:11px;line-height:1.5;margin:6px 6px 2px;padding:9px 4px 4px;min-width:180px;max-width:240px;color:var(--muted)}#game-menu .journal-notice{display:block;max-width:150px;font-size:10px;line-height:1.3;text-align:right;color:var(--muted)}#game-menu .journal-notice[hidden]{display:none}

#game-menu .journal-diagnostics{grid-column:1/-1;justify-self:start;min-height:44px;font-size:11px;margin:4px 6px 0;padding:8px 10px}#game-menu .journal-detail[hidden]{display:none}