:root{color-scheme:light;--paper:#f4efe6;--card:#fffdf8;--ink:#2a2f3a;--muted:#6f6878;--line:#e2dccd;--green:#1f6b4b;--amber:#c27f22;--gold:#e7c25a;--re-bg:var(--card);--re-ink:var(--ink);--re-muted:var(--muted);--re-line:var(--line);--re-accent:var(--green)}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,sans-serif}[hidden]{display:none!important}button,select{font:inherit;color:inherit;min-height:44px;border:1px solid var(--line);border-radius:9px;background:var(--card);padding:8px 12px}button{cursor:pointer;touch-action:manipulation}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid var(--amber);outline-offset:3px}a{color:var(--green)}
.shell{max-width:1280px;margin:auto;padding:24px 32px 10px}header{display:flex;gap:12px;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:16px}.brand{display:inline-flex;align-items:center;min-height:44px;font-size:16px;font-weight:800;letter-spacing:2px;text-decoration:none;color:var(--ink)}.brand span{color:var(--amber)}.utilities{display:flex;gap:6px;flex-wrap:wrap}.utilities button{font-size:13px}.heading{margin:30px 0 22px}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--green);font-weight:800}h1{font-size:clamp(36px,6vw,60px);letter-spacing:-2px;margin:0;line-height:1.1}h1 span{color:var(--green)}.howto{color:var(--muted);line-height:1.5}.layout{max-width:1140px;margin:auto}.lab{position:relative;border:1px solid var(--line);border-radius:20px;background:var(--card);padding:20px;box-shadow:0 12px 40px #3a2f1a08}
.game-area{scroll-margin-top:76px;width:min(100%,480px);margin:auto}.toolbar{display:flex;align-items:end;gap:10px}.toolbar label{flex:1;font-size:13px;font-weight:700}.toolbar select{display:block;width:100%;margin-top:5px}.hud{display:grid;grid-template-columns:repeat(3,1fr);margin:16px 0;padding:10px 0;border-block:1px solid var(--line);text-align:center}.hud small{font-size:12px;color:var(--muted)}.hud strong{display:block;font-size:22px;font-variant-numeric:tabular-nums;margin-top:4px}
/* The board is always square and sized by its width, so a new puzzle or size never shifts the page. */
.field{position:relative;container-type:inline-size;border-radius:16px;background:#243d37;padding:8px;box-shadow:inset 0 0 0 3px #b98a3e,inset 0 0 0 5px #5c4524}.board{--n:4;position:relative;aspect-ratio:1;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;touch-action:none}
.tile{--x:0;--y:0;position:absolute;left:0;top:0;width:calc(100% / var(--n));height:calc(100% / var(--n));min-height:0;padding:0;border:3px solid transparent;border-radius:12px;background-clip:padding-box;background-color:#5a4a8a;background-image:linear-gradient(150deg,#ffffff38,#0000 45%,#00000030);color:#fff8e6;font-size:calc(38cqi / var(--n));font-weight:800;font-variant-numeric:tabular-nums;line-height:1;text-shadow:0 2px 0 #0005;box-shadow:inset 0 -4px 0 #0003;transform:translate(calc(var(--x) * 100%),calc(var(--y) * 100%));transition:transform .12s ease-out}
.tile[data-band="0"]{background-color:#7a4fa3}.tile[data-band="1"]{background-color:#1f7a6d}.tile[data-band="2"]{background-color:#b2652a}.tile[data-band="3"]{background-color:#3d5fa8}.tile[data-band="4"]{background-color:#9b3d5c}
.tile[data-home="true"]::after{content:"";position:absolute;right:9%;top:9%;width:12%;aspect-ratio:1;border-radius:50%;background:var(--gold);box-shadow:0 0 6px var(--gold)}.tile[data-movable="true"]{cursor:pointer}.tile[data-movable="true"]:hover{filter:brightness(1.12)}.tile:focus-visible{outline:3px solid var(--gold);outline-offset:-3px;z-index:1}
body[data-phase="won"] .tile{animation:glow .6s ease-out}@keyframes glow{50%{filter:brightness(1.35)}}
.paused-note{position:absolute;inset:0;display:grid;place-content:center;gap:12px;text-align:center;border-radius:16px;background:#243d37;color:white;font-size:24px;font-weight:800}.paused-note p{margin:0}.paused-note button{background:var(--gold);color:var(--ink)}body[data-phase="paused"] .board{visibility:hidden}
.tools{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-top:14px}.tools a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.small,.instructions{font-size:13px;color:var(--muted);line-height:1.65}#status{font-size:14px;line-height:1.5;min-height:42px;margin-bottom:4px}.small{margin:0}.instructions{margin:14px 4px}
@media(max-width:600px){.shell{padding:12px 12px 4px}header{position:sticky;top:0;z-index:3;background:var(--paper);padding:6px 0 12px;gap:6px}.utilities{flex-wrap:nowrap}.lab{padding:12px}.heading{margin:16px 0 12px}.howto{font-size:14px;margin:8px 0}.eyebrow{letter-spacing:1px}.brand{font-size:12px;letter-spacing:1px}.utilities button{padding:6px 8px}.hud{margin:10px 0;padding:8px 0}.hud strong{font-size:18px;margin-top:2px}.field{padding:6px}.tile{border-width:2px;border-radius:9px}}
.game-help-links{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin:12px 4px}.game-help-links button,.game-help-links a{display:inline-flex;align-items:center;min-height:44px;font-size:13px}.game-help-links button{border:0;background:none;color:var(--green);padding:0}#help-panel{width:min(520px,calc(100% - 24px));max-height:calc(100dvh - 32px);padding:0;border:1px solid var(--line);border-radius:16px;background:var(--card);color:var(--ink)}#help-panel::backdrop{background:#17271fd9}#help-panel[open]{display:flex;flex-direction:column}.help-body{overflow:auto;padding:20px;line-height:1.65}.help-body h2{margin-top:0}.help-actions{padding:12px 20px;border-top:1px solid var(--line)}.help-actions button{width:100%}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.tile{transition:none}body[data-phase="won"] .tile{animation:none}}