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959px){.stage{grid-template-columns:minmax(0,1fr);padding:10px 10px 130px;gap:12px}.boardcol{--board: calc(100vw - 20px) ;width:100%;max-width:640px}.sidecol{display:none}.sheetcol{display:block}.sheet{position:fixed;left:0;right:0;bottom:0;z-index:25;background:var(--card);border-top:1px solid var(--line);border-radius:10px 10px 0 0;box-shadow:0 -6px 24px #00000026;display:flex;flex-direction:column;height:var(--sheet-h, 96px);max-height:92vh;transition:height .2s ease;padding-bottom:env(safe-area-inset-bottom)}.sheet.snap-peek{--sheet-h: 96px}.sheet.snap-half{--sheet-h: 50vh}.sheet.snap-full{--sheet-h: 90vh}.grab{min-height:28px;width:100%;border:0;background:transparent;display:grid;place-items:center;flex:none;touch-action:none}.grab span{width:40px;height:4px;border-radius:2px;background:var(--line)}.sheet .panel{border:0;border-radius:0;max-height:none;flex:1;min-height:0}.sheet.snap-peek .hintuse{display:none}.sheet.snap-peek .panelbody{padding-top:8px}.topbar{padding:6px 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