:root{color-scheme:light;--paper:#f5f7fb;--surface:#fff;--ink:#172c49;--muted:#596c83;--blue:#155bd7;--line:#dbe4ef;--soft:#eaf1ff;--radius:24px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.6}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,.board:focus-visible{outline:3px solid #0d55ce;outline-offset:4px}.shell{max-width:1060px;margin:auto;padding:28px 32px}.skip-link{position:absolute;left:16px;top:-90px;z-index:3;background:var(--ink);color:white;padding:12px 18px;border-radius:10px}.skip-link:focus{top:12px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-bottom:25px;border-bottom:1px solid var(--line)}.brand{font-size:22px;letter-spacing:.06em;font-weight:800}.brand span{display:block;font-size:11px;font-weight:500;letter-spacing:.12em;color:var(--muted)}.preview-badge{font-size:12px;font-weight:650;color:#355781;background:#e8eef9;border:1px solid #d6e1f3;padding:6px 12px;border-radius:30px}.intro{padding:42px 0 26px;max-width:610px}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.16em;font-weight:750;color:var(--blue);margin:0 0 10px}h1{font-size:clamp(42px,7vw,64px);letter-spacing:-.06em;line-height:1;margin:0 0 16px;font-weight:800}.title-dot{color:var(--blue)}.intro>p:last-child{font-size:17px;color:var(--muted);margin:0;max-width:500px}.game-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:28px;align-items:start}.play-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 12px 36px #29456908}.scorebar{display:flex;align-items:center;gap:30px;padding:0 2px 23px}.scorebar>div{display:grid;gap:2px}.stat-label{font-size:11px;color:var(--muted);font-weight:650}.scorebar strong{font-size:25px;font-variant-numeric:tabular-nums;line-height:1.2}.state-badge{margin-left:auto;font-size:11px;font-weight:650;background:var(--soft);color:var(--blue);border-radius:20px;padding:5px 10px}.state-badge.complete{color:#17614b;background:#e6f6ee}.board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:10px;background:#e9eff7;border:1px solid #dfe7f1;border-radius:19px;max-width:390px;margin:auto}.tile{aspect-ratio:1;min-width:0;min-height:44px;background:#fff;border:1px solid #cbd8e9;border-bottom:4px solid #c7d5e7;border-radius:12px;font-size:clamp(26px,4vw,42px);font-weight:700;color:#234567;line-height:1}.tile.movable{color:var(--blue);border-color:#8aacdf;background:#f7faff}.tile.movable:hover{background:#eaf2ff}.tile.movable:active{border-bottom-width:1px;transform:translateY(2px)}.tile.empty{background:#dde6f2;border:1px dashed #b6c7df;border-bottom-width:1px}.tile.correct{box-shadow:inset 0 0 0 1px #d5e1f3}.board.solved{background:#e4f3ec;border-color:#bcdcca}.board.solved .tile{color:#1d624c;border-color:#b2d6c4;background:#fafffc;opacity:1}.direction-pad{display:flex;gap:7px;justify-content:center;margin-top:18px}.direction-pad button{min-width:44px;min-height:44px;background:#f5f8fd;border:1px solid var(--line);border-radius:10px;font-size:20px;color:var(--ink)}.direction-pad button:hover:not(:disabled){background:var(--soft)}.direction-pad button:disabled{opacity:.35}.game-message{min-height:48px;text-align:center;font-size:13px;color:var(--muted);margin:15px 0}.board.solved~.game-message{color:#17614b;font-weight:650}.actions{display:flex;gap:10px;flex-wrap:wrap}.actions button{min-height:46px;border-radius:12px;font-size:13px;font-weight:700;padding:11px 15px;flex:1;white-space:normal}.primary{border:1px solid var(--blue);background:var(--blue);color:#fff}.primary:hover{background:#104daf}.secondary{border:1px solid var(--line);background:#fff;color:var(--ink)}.secondary:hover{background:#f5f8fd}.guide{padding:30px 20px 20px}.guide h2{font-size:25px;line-height:1.3;letter-spacing:-.03em;margin:0 0 18px}.guide p:not(.eyebrow){font-size:14px;color:var(--muted);margin:0 0 18px}.target-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:22px 0 10px}.target-board{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;width:136px}.target-board span{aspect-ratio:1;display:grid;place-items:center;font-weight:600;color:#496b98;background:#e5edf9;border:1px solid #d6e1f0;border-radius:7px}.target-board .target-empty{background:transparent;border-style:dashed}.guide p.guide-note{font-size:12px;margin-top:18px;max-width:290px}.preview-note{margin:24px 0 32px;font-size:12px;color:var(--muted);text-align:center}.notice{padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px}footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);padding:20px 0 6px;color:var(--muted);font-size:11px}footer span{color:#7b8ba0}@media(max-width:740px){.shell{padding:20px}.intro{padding-top:32px}.game-layout{grid-template-columns:minmax(0,1fr);gap:8px}.play-panel{padding:22px}.guide{padding:24px 8px 4px;display:grid;grid-template-columns:minmax(0,1fr) 136px;column-gap:22px}.guide>.eyebrow,.guide>h2,.guide>p:not(.guide-note){grid-column:1/-1}.target-label{margin-top:0;grid-column:2}.target-board{grid-column:2;grid-row:6 / span 2}.guide p.guide-note{grid-column:1;grid-row:6;margin:0;align-self:start}.preview-note{margin-top:20px}}@media(max-width:380px){.shell{padding:16px}.topbar{gap:12px}.preview-badge{font-size:10px}.play-panel{padding:17px}.scorebar{gap:21px}.board{gap:7px;padding:8px}.tile{border-radius:9px}.guide{display:block}.target-label{margin-top:20px}.guide p.guide-note{margin-top:16px}.actions button{padding:10px;font-size:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.tile.movable:active{transform:none}} 
.topbar-links{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.store-link{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 12px;border:1px solid #dbe4ef;border-radius:11px;background:#fff;color:#234567;font-size:12px;font-weight:650;text-decoration:none}.store-link:hover{background:#eaf1ff;color:#155bd7}