:root{color-scheme:light dark;--bg: #ffffff;--surface: #f6f6f6;--fg: #101010;--muted: #383838;--line: #c8c8c8;--line-strong: #686868;--cell-hover: #d4d4d4;--cell-peer: #eeeeee;--cell-peer-ring: transparent;--cell-match: #cfcfcf;--cell-match-ring: transparent;--cell-selected: var(--cell-hover);--cell-selected-ring: transparent;--app-bg: #ffffff;--panel-bg: var(--bg);--frame-padding: clamp(1rem, 2vw, 2rem);--board-size: min(78vmin, 680px);--cell-size: calc((var(--board-size) - 8px) / 9);--control-row-size: calc(var(--cell-size) * 1.08);--control-gap: .4rem}@media(prefers-color-scheme:dark){:root{--bg: #000000;--surface: #090909;--fg: #f3f3f3;--muted: #b9b9b9;--line: #262626;--line-strong: #6a6a6a;--cell-hover: #232323;--cell-peer: #121212;--cell-peer-ring: #303030;--cell-match: #1e1e1e;--cell-match-ring: #525252;--cell-selected: #343434;--cell-selected-ring: #d7d7d7;--app-bg: #000000;--panel-bg: #050505}}*{box-sizing:border-box}:where(html,body,#root){margin:0;min-height:100%}#root{display:grid;height:100dvh;padding:var(--frame-padding);justify-items:center}@media(orientation:portrait){#root{padding-inline:0}}body{font-family:IBM Plex Mono,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;background:var(--app-bg);color:var(--fg)}:where(button,input,select,textarea){font:inherit;border-radius:0}.app-shell{width:100%;display:grid}.mobile-topbar{display:none}.board-panel{grid-area:board;width:var(--board-size);aspect-ratio:1;display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);border:4px solid var(--line-strong);background:var(--surface)}.cell{position:relative;width:100%;height:100%;padding:0;border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;place-items:center;background:var(--surface);box-shadow:inset 0 0 8px color-mix(in srgb,var(--line) 28%,transparent);&:hover{background:var(--cell-hover)}&.border-right{border-right:4px solid var(--line-strong)}&.border-bottom{border-bottom:4px solid var(--line-strong)}&.given .cell-value{color:var(--fg);font-weight:700}&.editable .cell-value{color:var(--muted)}&.peer-highlight{background:var(--cell-peer);box-shadow:inset 0 0 0 1px var(--cell-peer-ring),inset 0 0 8px color-mix(in srgb,var(--line) 28%,transparent)}&.same-value-highlight{background:var(--cell-match);box-shadow:inset 0 0 0 1px var(--cell-match-ring),inset 0 0 8px color-mix(in srgb,var(--line) 28%,transparent)}&.selected{background:var(--cell-selected);box-shadow:inset 0 0 0 2px var(--cell-selected-ring),inset 0 0 8px color-mix(in srgb,var(--line) 28%,transparent)}}.cell-error-dot{position:absolute;top:.32rem;right:.32rem;width:.42rem;height:.42rem;border-radius:999px;background:#ff3b30;box-shadow:0 0 6px color-mix(in srgb,#ff3b30 70%,transparent);pointer-events:none}.cell-value{font-size:clamp(1.4rem,2.4vw,2.2rem);line-height:1}.notes-grid{width:100%;height:100%;padding:2px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);.note{display:grid;place-items:center;font-size:clamp(.45rem,.7vw,.75rem)}}.control-panel{grid-area:controls;display:grid;grid-template-rows:auto 1fr;gap:1rem;padding:.75rem;border-block-start:1px solid var(--line);background:var(--panel-bg)}.control-meta,.control-actions{display:grid}.control-meta{gap:.25rem}.control-actions{gap:.5rem;align-content:end}.control-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--control-gap)}.mode-switch{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border:1px solid var(--line);.mode{border:0;padding:.5rem .7rem;background:var(--surface);color:var(--muted);font:inherit;font-size:.86rem;font-weight:600;text-transform:none;border-radius:0;cursor:pointer;+.mode{border-left:1px solid var(--line)}&:hover{background:color-mix(in srgb,var(--surface) 86%,var(--fg))}&[data-selected=true],&[aria-pressed=true],&.active{background:var(--fg);color:var(--bg)}}}.secondary-action{margin:0;border:1px solid var(--line);min-width:var(--control-row-size);padding:0;display:grid;place-items:center;background:var(--surface);color:var(--fg);font:inherit;font-size:.8rem;font-weight:700;border-radius:0;cursor:pointer;&:not(:disabled):hover{background:color-mix(in srgb,var(--surface) 86%,var(--fg))}&:disabled,&[aria-disabled=true]{color:color-mix(in srgb,var(--fg) 35%,var(--surface));cursor:not-allowed}}.digit-pad{display:grid;grid-template-columns:repeat(5,var(--cell-size));gap:var(--control-gap);justify-content:end}.digit-button{width:var(--cell-size);min-height:var(--cell-size);margin:0;border:1px solid var(--line);padding:0;background:var(--surface);color:var(--fg);font:inherit;font-size:clamp(1.1rem,calc(var(--cell-size) * .36),1.8rem);font-weight:700;line-height:1;cursor:pointer;&:not(:disabled):hover{background:color-mix(in srgb,var(--surface) 86%,var(--fg))}&[data-selected=true]{background:var(--fg);color:var(--bg)}&:disabled,&[aria-disabled=true]{color:color-mix(in srgb,var(--fg) 35%,var(--surface));cursor:not-allowed}}.undo-action{min-height:var(--cell-size)}.undo-label{display:none}.undo-icon{display:block}.control-info{margin:0;text-transform:uppercase;&[data-kind=time]{font-size:.78rem;font-weight:500}&[data-kind=game]{color:var(--muted);font-size:.78rem;font-weight:500}}.difficulty-button{padding:0;border:0;background:transparent;text-align:left;cursor:pointer}.completion-overlay{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:1rem;background:color-mix(in srgb,var(--bg) 74%,transparent);backdrop-filter:blur(2px)}.completion-card{width:min(26rem,100%);padding:1.1rem;border:1px solid var(--line-strong);background:var(--panel-bg);display:grid;gap:.5rem}.completion-kicker{margin:0;color:var(--muted);font-size:.78rem;text-transform:uppercase}.completion-title{margin:0;font-size:1.3rem;line-height:1.2;text-transform:uppercase}.completion-stat{margin:0;font-size:.9rem}.completion-continue{margin-top:.5rem;border:1px solid var(--line-strong);min-height:calc(var(--cell-size) * .85);padding:0 .9rem;background:var(--fg);color:var(--bg);font:inherit;font-weight:700;text-transform:uppercase;cursor:pointer;&:hover{background:color-mix(in srgb,var(--fg) 85%,var(--bg))}}@media(orientation:landscape){.app-shell{--panel-width: clamp(15rem, 24dvw, 22rem);--board-size: min( calc(100dvh - (var(--frame-padding) * 2)), max(12rem, calc(100dvw - (var(--frame-padding) * 2) - var(--panel-width))) );width:min(100%,calc(var(--board-size) + var(--panel-width)));grid-template-columns:var(--board-size) var(--panel-width);grid-template-areas:"board controls";align-items:center;background:var(--panel-bg)}.control-panel{justify-self:stretch;width:100%;height:var(--board-size);padding:1rem 1.4rem;border-block-start:0;border-inline-start:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;align-items:center;background:var(--panel-bg)}.board-panel{justify-self:end}.control-meta{margin-top:0;margin-bottom:.6rem;width:calc(var(--cell-size) * 3 + var(--control-gap) * 2);display:flex;justify-content:space-between}.control-actions{--desktop-aux-scale: .7;--desktop-aux-size: calc(var(--cell-size) * var(--desktop-aux-scale));width:calc(var(--cell-size) * 3 + var(--control-gap) * 2);margin-inline:auto;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:var(--control-gap);align-content:end}.control-row{display:contents}.mode-switch{order:1;grid-column:1 / -1}.mode-switch .mode{min-height:var(--desktop-aux-size)}.digit-pad{order:2;grid-column:1 / -1;display:contents}.digit-pad .digit-button{order:2;grid-column:span 2;width:100%;min-height:var(--cell-size);font-size:clamp(1.1rem,calc(var(--cell-size) * .36),1.8rem);display:grid;place-items:center}.digit-pad .clear-action{order:3}.undo-action{order:4;grid-column:span 2;min-width:0}}@media(orientation:portrait){.app-shell{--board-size: min(94dvw, 72dvh);grid-template-columns:1fr;grid-template-areas:"topbar" "board" "controls";grid-template-rows:auto auto 1fr}.mobile-topbar{grid-area:topbar;display:flex;align-items:baseline;justify-content:space-between;width:min(100%,var(--board-size));padding:.75rem 0;justify-self:center}.control-panel{grid-template-rows:auto;width:100%;padding:.75rem 0;align-self:start;justify-self:stretch}.board-panel{place-self:center}.control-meta{display:none}.control-row{display:flex;justify-content:space-between}.control-actions{width:min(100%,var(--board-size));margin-inline:auto;align-content:center;padding-block-end:max(1rem,env(safe-area-inset-bottom))}.digit-pad{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));grid-template-rows:repeat(2,var(--cell-size));gap:var(--control-gap);justify-content:stretch}.digit-button{min-height:var(--cell-size);width:100%}}