.ht257-page{max-width:1120px}.ht257-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin:18px 0 12px}.ht257-head h1{margin:.15rem 0 .25rem;font-size:clamp(2rem,5vw,3.25rem);line-height:1}.ht257-head h1 small{display:block;margin-top:.45rem;font-size:.34em;font-weight:700;color:var(--muted)}.ht257-head p{max-width:760px;margin:0;color:var(--muted)}.ht257-badge{white-space:nowrap;border:1px solid var(--border);border-radius:999px;padding:8px 12px;background:var(--panel);font-weight:800}.ht257-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.ht257-tabs button{border:1px solid var(--border);background:var(--panel);color:var(--text);padding:9px 15px;border-radius:999px;font-weight:800;cursor:pointer}.ht257-tabs button.active{background:var(--text);color:var(--bg)}.ht257-shell{padding:14px}.ht257-hud{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-bottom:12px}.ht257-hud>div{background:var(--panel-2,#f5f5f5);border:1px solid var(--border);border-radius:14px;padding:9px 11px}.ht257-hud small{display:block;color:var(--muted);font-size:.72rem}.ht257-hud strong{font-size:1.05rem}.ht257-game{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:18px;align-items:start}.ht257-boardwrap{min-width:0}.ht257-topline{display:flex;justify-content:space-between;gap:12px;align-items:flex-end;margin-bottom:9px}.ht257-topline strong{font-size:1.05rem}.ht257-topline small{color:var(--muted)}.ht257-tools{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 10px}.ht257-tools button{border:1px solid var(--border);background:var(--panel);padding:8px 12px;border-radius:10px;font-weight:800;cursor:pointer}.ht257-tools button.active{outline:2px solid currentColor;background:var(--text);color:var(--bg)}.ht257-board{--n:7;display:grid;grid-template-columns:repeat(var(--n),1fr);width:min(100%,560px);aspect-ratio:1;margin:0 auto;border:2px solid var(--text);background:var(--text);gap:1px;touch-action:manipulation}.ht257-cell{position:relative;border:0;background:var(--bg);color:var(--text);font-weight:850;font-size:clamp(1rem,4.4vw,1.75rem);cursor:pointer;min-width:0;padding:0}.ht257-cell:hover,.ht257-cell:focus-visible{z-index:1;outline:3px solid #7c8cff;outline-offset:-3px}.ht257-cell.black{background:#222;color:#fff}.ht257-cell.kept::after{content:"";position:absolute;inset:16%;border:3px solid currentColor;border-radius:50%;opacity:.65}.ht257-cell.conflict{box-shadow:inset 0 0 0 4px #d54b4b}.ht257-cell.hint-target{box-shadow:inset 0 0 0 4px #6d7cff}.ht257-side{display:grid;gap:9px}.ht257-side .btn{width:100%;justify-content:center}.ht257-rule{border:1px solid var(--border);border-radius:12px;padding:10px;background:var(--panel-2,#f6f6f6);font-size:.86rem;color:var(--muted)}.ht257-status{margin:11px 0 0;min-height:1.5em;color:var(--muted)}.ht257-hint{display:flex;justify-content:space-between;align-items:center;gap:12px;border:1px solid var(--border);border-radius:14px;padding:11px 12px;margin-top:10px;background:var(--panel)}.ht257-hint p{margin:.2rem 0 0;color:var(--muted)}.ht257-result{margin-top:12px;border:1px solid var(--border);border-radius:16px;padding:14px;background:var(--panel)}.ht257-resultgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:9px 0 12px}.ht257-resultgrid div{border:1px solid var(--border);border-radius:12px;padding:9px}.ht257-resultgrid small{display:block;color:var(--muted)}.ht257-resultgrid strong{font-size:1.2rem}.ht257-more{margin-top:14px;border:1px solid var(--border);border-radius:16px;background:var(--panel)}.ht257-more>summary,.ht257-advanced>summary{cursor:pointer;padding:13px 15px;font-weight:850}.ht257-moregrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0 14px 14px}.ht257-panel{border:1px solid var(--border);border-radius:14px;padding:12px}.ht257-panel h3{margin:.1rem 0 .7rem}.ht257-settings{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.ht257-settings label{display:grid;gap:4px;font-size:.82rem;color:var(--muted)}.ht257-settings select,.ht257-settings input{width:100%;padding:8px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text)}.ht257-recent{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.ht257-recent div{border:1px solid var(--border);border-radius:10px;padding:8px}.ht257-recent small{display:block;color:var(--muted)}.ht257-guide{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}.ht257-guide>div{border:1px solid var(--border);border-radius:16px;padding:14px;background:var(--panel)}.ht257-guide h2{font-size:1.05rem;margin:.15rem 0 .45rem}.ht257-guide p{margin:0;color:var(--muted)}.ht257-advanced{margin:18px 0;border:1px solid var(--border);border-radius:16px;background:var(--panel)}.ht257-advanced #ht225Lab{margin:0;border:0;border-top:1px solid var(--border);border-radius:0}.ht257-page .mobile-dock{display:none}.ht257-complete .ht257-board{filter:saturate(.85)}
@media(max-width:780px){.ht257-head{margin-top:10px}.ht257-head h1{font-size:2rem}.ht257-head h1 small{font-size:.42em}.ht257-head p{font-size:.92rem}.ht257-badge{display:none}.ht257-tabs{margin:8px 0}.ht257-tabs button{padding:8px 12px}.ht257-shell{padding:10px}.ht257-hud{grid-template-columns:repeat(4,1fr);gap:5px}.ht257-hud>div{padding:7px 6px;text-align:center}.ht257-hud small{font-size:.62rem}.ht257-hud strong{font-size:.9rem}.ht257-game{display:block}.ht257-side{grid-template-columns:repeat(3,1fr);margin-top:10px}.ht257-side .btn{padding:9px 6px}.ht257-rule{grid-column:1/-1}.ht257-board{width:min(100%,540px)}.ht257-cell{font-size:clamp(.95rem,6vw,1.55rem)}.ht257-hint{align-items:flex-start;flex-direction:column}.ht257-resultgrid{grid-template-columns:repeat(2,1fr)}.ht257-moregrid{grid-template-columns:1fr}.ht257-guide{grid-template-columns:1fr}.ht257-recent{grid-template-columns:1fr 1fr}.ht257-status{font-size:.9rem}.ht257-topline small{font-size:.75rem}}
@media(max-width:420px){.ht257-head h1{font-size:1.7rem}.ht257-head p{display:none}.ht257-tools{margin-bottom:7px}.ht257-tools button{padding:7px 10px}.ht257-board{width:100%}.ht257-cell{font-size:clamp(.85rem,6vw,1.3rem)}.ht257-side{gap:6px}.ht257-more>summary,.ht257-advanced>summary{padding:11px 12px}}

.ht257-body .mobile-dock{display:none!important}