:root{color-scheme:light;--paper:#fbf4ea;--card:#fffdf8;--ink:#3a2f2a;--muted:#7a6a60;--line:#eadfd2;--accent:#d9734e;--accent-ink:#fff;--wall:#5b4a40;--soft:#f4ebe0;--danger:#c4372b;--hint:#2f7d6b;
  --room-0:#ffcfa8;--room-1:#b8e6c9;--room-2:#d6c8f5;--room-3:#f9e48f;--room-4:#b5d6fa;--room-5:#f7bdd3;--room-6:#dbeb9e;--room-7:#ddd3c6;
  font-family:ui-rounded,"Avenir Next",Avenir,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper)}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit;cursor:pointer;touch-action:manipulation;min-height:44px;border:0;color:inherit;border-radius:12px}
button:disabled{cursor:default;opacity:.5}
button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
a{color:inherit;text-underline-offset:4px}[hidden]{display:none!important}
.shell{max-width:1080px;margin:0 auto;padding:0 32px}
.site-header{height:76px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:12px}
.brand{font-size:15px;letter-spacing:.13em;text-decoration:none;font-weight:800}.brand span{color:var(--accent)}
.header-actions{display:flex;gap:6px}
.quiet{padding:10px 14px;background:transparent;font-size:13px;font-weight:650}.quiet:hover{background:var(--soft)}
.heading{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:26px 0 20px}
.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.15em;font-weight:800;margin:0 0 8px;color:var(--muted)}
h1,h2,p{margin-top:0}
h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(38px,6vw,60px);line-height:1;margin:0 0 10px;font-weight:600}h1>span:last-child{color:var(--accent);font-style:italic}
.tagline{margin:0;color:var(--muted);font-size:16px;max-width:560px}
.guide-link{font-weight:700;font-size:14px;white-space:nowrap}
.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start;padding-bottom:28px}
.board-card,.rules-card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:0 10px 30px rgba(90,60,40,.07)}
.board-card{position:relative;padding:18px;min-height:520px;--re-accent:var(--accent);--re-ink:var(--ink);--re-muted:var(--muted);--re-line:var(--line);--re-card:var(--card);--re-bg:var(--card)}
.modes{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;background:var(--soft);border-radius:14px;margin-bottom:12px}
.mode{background:transparent;font-weight:750;font-size:15px}.mode[aria-pressed="true"]{background:var(--card);box-shadow:0 1px 4px rgba(90,60,40,.15)}
.practice-bar{display:flex;gap:8px;align-items:stretch;margin-bottom:12px;flex-wrap:wrap}
.sizes{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;flex:1 1 300px}
.size{background:var(--soft);font-weight:800;font-size:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1;padding:6px 4px}
.size small{font-weight:600;font-size:11px;color:var(--muted)}
.size[aria-pressed="true"]{background:var(--ink);color:#fff}.size[aria-pressed="true"] small{color:#f1e4d8}
.outline{background:var(--card);border:1.5px solid var(--line);font-weight:700;padding:8px 14px}.outline:not(:disabled):hover{border-color:var(--accent)}
.compact{padding:6px 14px}
.primary{background:var(--accent);color:var(--accent-ink);font-weight:800;padding:10px 18px}
.puzzle-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:10px}
.puzzle-head h2{font-size:18px;margin:0}
.hud{display:flex;gap:14px;margin:0;font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}.hud strong{color:var(--ink)}
.board-wrap{display:flex;justify-content:center}
.board{--n:7;display:grid;grid-template-columns:repeat(var(--n),minmax(0,1fr));grid-template-rows:repeat(var(--n),minmax(0,1fr));width:min(100%,520px);aspect-ratio:1;border:3px solid var(--wall);border-radius:10px;overflow:hidden;background:var(--wall);gap:1px;user-select:none;-webkit-user-select:none}
.cell{position:relative;min-height:0;border-radius:0;padding:0;background:var(--room-color);--room-color:var(--room-0);display:flex;align-items:center;justify-content:center;border:0 solid var(--wall)}
.cell[data-room="1"]{--room-color:var(--room-1)}.cell[data-room="2"]{--room-color:var(--room-2)}.cell[data-room="3"]{--room-color:var(--room-3)}.cell[data-room="4"]{--room-color:var(--room-4)}.cell[data-room="5"]{--room-color:var(--room-5)}.cell[data-room="6"]{--room-color:var(--room-6)}.cell[data-room="7"]{--room-color:var(--room-7)}
.cell.wall-top{border-top-width:2px}.cell.wall-bottom{border-bottom-width:2px}.cell.wall-left{border-left-width:2px}.cell.wall-right{border-right-width:2px}
.board>.cell:focus-visible{outline:3px solid var(--ink);outline-offset:-5px;z-index:2}
@media (hover:hover){.board:not(.solved) .cell:hover{filter:brightness(1.05) saturate(1.1)}}
.room-tag{position:absolute;top:2px;left:4px;font-size:clamp(9px,1.6vw,12px);font-weight:800;color:rgba(58,47,42,.55);line-height:1}
.piece{display:flex;align-items:center;justify-content:center;width:100%;height:100%;font-size:clamp(14px,4.2vw,26px);font-weight:700;color:rgba(58,47,42,.5)}
.piece svg{width:74%;height:74%;color:#4a3a33;--cat-face:#fff;filter:drop-shadow(0 1px 0 rgba(255,255,255,.6))}
.has-cat .piece{animation:settle .28s ease-out}
@keyframes settle{from{transform:scale(.6)}to{transform:scale(1)}}
.cell.conflict{background:repeating-linear-gradient(45deg,var(--room-color) 0 6px,#f6b3a9 6px 9px)}
.cell.conflict .piece svg{color:var(--danger)}
.cell.conflict::after{content:"!";position:absolute;right:3px;bottom:2px;width:16px;height:16px;border-radius:50%;background:var(--danger);color:#fff;font-size:11px;font-weight:900;line-height:16px;text-align:center}
.cell.hinted{box-shadow:inset 0 0 0 3px var(--hint)}
.board.solved .cell:not(.has-cat){filter:saturate(.7)}
.instructions{font-size:13px;color:var(--muted);text-align:center;margin:12px 0 10px}
.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.status{margin:12px 0 0;min-height:44px;padding:10px 12px;border-radius:12px;background:var(--soft);font-size:14px;line-height:1.4}
.rules-card{padding:20px}.rules-card h2{font-size:20px;margin-bottom:10px}
.rules{padding-left:20px;margin:0 0 12px;line-height:1.5}.rules li{margin-bottom:6px}
.small{font-size:13px;color:var(--muted);line-height:1.5}
.legend{display:grid;gap:8px;margin:14px 0;font-size:13px}.legend span{display:flex;align-items:center;gap:10px}
.key{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;background:var(--room-3);font-style:normal;font-weight:800;color:rgba(58,47,42,.55)}
.key svg{width:22px;height:22px;color:#4a3a33}.key-conflict{background:var(--danger);color:#fff;border-radius:50%;width:22px;height:22px;margin:0 3px;font-size:13px}
.record{margin:0}
footer{display:flex;justify-content:space-between;gap:16px;padding:18px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
dialog{max-width:min(460px,calc(100vw - 32px));border:0;border-radius:20px;padding:22px;color:var(--ink);background:var(--card);box-shadow:0 20px 60px rgba(40,25,15,.25)}
dialog::backdrop{background:rgba(40,25,15,.35)}
.dialog-head{display:flex;justify-content:space-between;align-items:center}.close{min-width:44px}
.help-steps{padding-left:20px;line-height:1.5}.keyboard-help{font-size:13px;color:var(--muted)}
@media (max-width:860px){.game-layout{grid-template-columns:1fr}.rules-card{order:2}}
@media (max-width:600px){
  .shell{padding:0 16px}.site-header{height:60px}.quiet{padding:8px 10px}
  .heading{padding:16px 0 12px}.guide-link{display:none}.tagline{font-size:14px}
  .board-card{padding:12px;border-radius:18px;min-height:0}
  .board{border-width:2px}
  .tools{gap:6px}.tools .outline{padding:8px 6px;font-size:14px}
  .practice-bar{gap:6px}.sizes{flex-basis:100%}#new-puzzle{flex:1}
  footer{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){.has-cat .piece{animation:none}}