.rule-practice{border:1.5px solid var(--line,#e6e0d2);border-radius:var(--r-card,18px);background:#fff;min-width:0;margin-top:14px;padding:10px}.rule-practice-heading{flex-wrap:wrap;align-items:center;gap:6px 10px;margin:0 0 6px;font-size:17px;line-height:1.4;display:flex}.rule-practice-badge{color:var(--green,#2f6f6b);border:1px solid var(--green-pill-line,#d9e7e4);border-radius:999px;padding:1px 8px;font-size:13px;font-weight:700}.rule-practice-goal,.rule-practice-howto{overflow-wrap:anywhere;margin:0 0 4px;font-size:16px;line-height:1.7}.rule-practice-scope{color:var(--muted,#5e5d57);margin:0;font-size:14px;line-height:1.6}.rule-practice-board{flex-direction:column;align-items:center;gap:10px;min-width:0;margin:12px 0 0;display:flex}.rule-practice-status{border:1.5px solid var(--line,#e6e0d2);background:var(--surface-2,#f7f3e8);overflow-wrap:anywhere;border-radius:12px;align-items:baseline;gap:8px;min-height:44px;margin:12px 0 0;padding:8px 10px;font-size:15px;line-height:1.6;display:flex}.rule-practice-status.is-error{border-color:var(--err,#a83a32);border-style:dashed}.rule-practice-status.is-success{border-color:var(--ok,#2e8b57);border-width:2.5px}.rule-practice-tone{flex:none;font-size:13px;font-weight:700}.rule-practice-status.is-error .rule-practice-tone{color:var(--err,#a83a32)}.rule-practice-status.is-success .rule-practice-tone{color:var(--ok,#2e8b57)}.rule-practice button{font:inherit;color:var(--ink,#2a2a26);cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.rule-practice button:focus-visible{outline:3px solid var(--green,#2f6f6b);outline-offset:2px;z-index:1;position:relative}.rule-practice-reset{border:1.5px solid var(--line,#e6e0d2);background:#fff;border-radius:999px;min-height:44px;margin-top:10px;padding:0 16px;font-size:15px;font-weight:700}.rule-practice .rp-note{color:var(--muted,#5e5d57);text-align:center;margin:0;font-size:14px;line-height:1.6}.rule-practice button.is-selected{box-shadow:inset 0 0 0 3px var(--ink,#2a2a26);border-style:dashed}.rule-practice .rp-pad{flex-wrap:wrap;justify-content:center;gap:6px;max-width:260px;display:flex}.rule-practice .rp-key{border:1.5px solid var(--ink,#2a2a26);background:#fff;border-radius:10px;min-width:44px;min-height:44px;font-size:18px;font-weight:700}.rule-practice .rp-key-wide{padding:0 12px;font-size:15px}.rule-practice .rp-np-grid{box-sizing:border-box;aspect-ratio:1;border:2.5px solid var(--ink,#2a2a26);background:var(--surface-2,#f7f3e8);grid-template-rows:repeat(9,minmax(0,1fr));grid-template-columns:repeat(9,minmax(0,1fr));width:100%;max-width:324px;display:grid}.rule-practice .rp-np-cell,.rule-practice .rp-np-target{box-sizing:border-box;border:0;border-right:1px solid var(--grid-line,#cfc9ba);border-bottom:1px solid var(--grid-line,#cfc9ba);place-items:center;width:100%;min-width:0;height:100%;min-height:0;margin:0;padding:0;font-size:15px;font-weight:700;line-height:1;display:grid;overflow:hidden}.rule-practice .rp-np-cell.is-peer{background:#fff}.rule-practice .rp-np-grid>:nth-child(9n){border-right:0}.rule-practice .rp-np-grid>:nth-child(n+73){border-bottom:0}.rule-practice .rp-np-grid .rp-np-bc{border-right:2.5px solid var(--ink,#2a2a26)}.rule-practice .rp-np-grid .rp-np-br{border-bottom:2.5px solid var(--ink,#2a2a26)}.rule-practice .rp-np-target{-webkit-appearance:none;appearance:none;background:var(--mustard,#e9b949);font-size:18px}.rule-practice .rp-np-target.is-solved{color:var(--green,#2f6f6b)}.rule-practice .rp-np-target:focus-visible{outline-offset:-3px}.rule-practice .rp-np-pick{box-sizing:border-box;background:var(--mustard,#e9b949);border:1.5px solid var(--ink,#2a2a26);border-radius:999px;min-width:44px;min-height:44px;margin:0;padding:0 16px;font-size:15px;font-weight:700;line-height:1.3}.rule-practice .rp-row{gap:6px;display:flex}.rule-practice .rp-cell{border:1.5px solid var(--ink,#2a2a26);background:#fff;border-radius:8px;width:52px;min-width:44px;height:52px;min-height:44px;padding:0;font-size:22px;font-weight:700}.rule-practice .rp-cell.is-given{background:var(--surface-2,#f7f3e8)}.rule-practice .rp-tile{flex-direction:column;justify-content:center;align-items:center;height:60px;display:flex}.rule-practice .rp-tile-char{line-height:1.1}.rule-practice .rp-tile-pos{color:var(--muted,#5e5d57);font-size:12px;font-weight:400}.rule-practice .rp-maze{border:3px solid var(--ink,#2a2a26);background:#fff;grid-template-columns:repeat(4,52px);display:grid}.rule-practice .rp-maze-cell{border:0;border-right:1px dotted var(--grid-line,#cfc9ba);border-bottom:1px dotted var(--grid-line,#cfc9ba);background:#fff;place-items:center;width:52px;height:52px;padding:0;display:grid;position:relative}.rule-practice .rp-maze-cell:nth-child(4n){border-right:0}.rule-practice .rp-maze-cell:nth-last-child(-n+4){border-bottom:0}.rule-practice .rp-maze-cell.wall-r{border-right:3px solid var(--ink,#2a2a26)}.rule-practice .rp-maze-cell.wall-b{border-bottom:3px solid var(--ink,#2a2a26)}.rule-practice .rp-maze-cell.is-here{background:var(--surface-2,#f7f3e8)}.rule-practice .rp-maze-cell:focus-visible{outline-offset:-4px}.rule-practice .rp-maze-mark{color:var(--muted,#5e5d57);font-size:13px;font-weight:700;position:absolute;top:2px;left:5px}.rule-practice .rp-maze-here{color:var(--green,#2f6f6b);font-size:22px}.rule-practice .rp-fifteen{grid-template-columns:repeat(3,60px);gap:4px;display:grid}.rule-practice .rp-fifteen-cell{background:var(--surface-2,#f7f3e8);width:60px;height:60px}.rule-practice .rp-fifteen-cell.is-movable{background:#fff;border-width:2.5px}.rule-practice .rp-fifteen-cell.is-blank{border-style:dashed;border-color:var(--grid-line,#cfc9ba);background:0 0}.rule-practice .rp-hanoi{gap:6px;width:100%;max-width:340px;display:flex}.rule-practice .rp-peg{border:1.5px solid var(--line,#e6e0d2);background:#fff;border-radius:10px;flex-direction:column;flex:1 1 0;justify-content:flex-end;align-items:center;gap:6px;min-width:44px;min-height:150px;padding:6px 4px;display:flex}.rule-practice .rp-peg-stack{border-bottom:3px solid var(--ink,#2a2a26);flex-direction:column-reverse;justify-content:flex-start;align-items:center;gap:3px;width:100%;min-height:96px;display:flex}.rule-practice .rp-disk{text-align:center;background:var(--mustard,#e9b949);border:1.5px solid var(--ink,#2a2a26);border-radius:6px;height:24px;font-size:14px;font-weight:700;line-height:24px;display:block}.rule-practice .rp-disk.is-lifted{border-style:dashed;transform:translateY(-4px)}.rule-practice .rp-peg-stack{flex:none}.rule-practice .rp-peg-name{color:var(--muted,#5e5d57);text-align:center;overflow-wrap:anywhere;flex:none;justify-content:center;align-items:flex-start;width:100%;min-height:2.6em;font-size:13px;line-height:1.3;display:flex}@media (prefers-reduced-motion:reduce){.rule-practice .rp-disk.is-lifted{transform:none}}