/* Site shell and modern controls; selectors never escape the Sudoku section. */
.ba-sudoku{--background-color:#fff;--color-blue:#00b995;--color-grey:#18243b;--color-grey-light:#06866f;--color-grey-lighter:#d9e4ec;--color-orange:#e3f5f0;--color-orange-dark:#c1f1e3}.ba-sudoku--io{--ba-accent:#6366f1;--ba-dark:#4f46e5;--ba-blue:#8b5cf6;--ba-soft:#f7f7ff;--color-blue:#6366f1;--color-grey-light:#4f46e5;--color-orange:#eeedff;--color-orange-dark:#dad8ff}.ba-sudoku-header{padding:45px 0 0;background:linear-gradient(145deg,#f4fbf9,#fff 48%,#edf5ff)}.ba-sudoku--io .ba-sudoku-header{background:linear-gradient(145deg,#f7f7ff,#fff 48%,#fff4ee)}.ba-sudoku-header h1{font-size:clamp(36px,5vw,58px);letter-spacing:-.045em}.ba-sudoku-header>.ba-shell>p{max-width:690px;margin:18px 0 27px;font-size:18px}.ba-sudoku-nav{display:flex;gap:8px;flex-wrap:wrap;padding-bottom:26px}.ba-sudoku-nav a{padding:10px 18px;border:1px solid #dfe8ed;border-radius:11px;background:#ffffffc9;color:var(--ba-muted);font-size:14px;font-weight:700}.ba-sudoku-nav a.is-active{background:var(--ba-ink);color:#fff;border-color:var(--ba-ink)}.ba-sudoku-nav a:hover{border-color:var(--ba-accent);color:var(--ba-dark)}.ba-sudoku-nav a.is-active:hover{color:#fff}.ba-sudoku-play{padding:35px 0 60px}.ba-sudoku-workspace{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:26px;align-items:start}.ba-sudoku-game{border:1px solid #e1e9ee;border-radius:24px;background:#fff;padding:28px;box-shadow:0 20px 50px #3254740d;min-width:0}.ba-sudoku-game-heading{display:flex;justify-content:space-between;gap:20px;margin-bottom:22px}.ba-sudoku-game-heading h2{font-size:24px}.ba-sudoku-game-heading p{font-size:13px;margin-top:9px;max-width:440px}.ba-sudoku-game-heading>span{align-self:flex-start;padding:5px 10px;border-radius:8px;background:#e1f7f1;color:var(--ba-dark);font-size:11px;font-weight:800}.ba-sudoku-aside{display:grid;gap:18px}.ba-sudoku-aside .ba-panel{padding:24px}.ba-sudoku-aside h2{font-size:24px}.ba-sudoku-aside p{font-size:14px}.ba-sudoku-aside .ba-steps{gap:16px;font-size:14px}.ba-sudoku-aside .ba-button{margin-top:22px;width:100%;font-size:14px;padding:12px}.ba-sudoku-tip{padding:20px 24px}.ba-sudoku-tip h3{font-size:17px}.ba-sudoku-tip p{margin-top:10px}.ba-sudoku #root{font-family:inherit;color:var(--ba-ink);font-weight:400;line-height:1.4}.ba-sudoku #root .container{width:100%;max-width:none;min-width:0;margin:0;padding:0}.ba-sudoku #root .headerS{display:flex;justify-content:flex-end;margin-bottom:18px}.ba-sudoku #root .headerS button{background:var(--ba-accent);border:0;border-radius:10px;padding:10px 17px;font-size:14px;font-weight:700;color:#fff;cursor:pointer}.ba-sudoku #root .innercontainer{display:grid;grid-template-columns:minmax(0,1fr) 155px;gap:22px;padding:0;max-width:none;margin:0}.ba-sudoku #root .game,.ba-sudoku #root .status{width:100%;min-width:0}.ba-sudoku #root .game__board{width:100%;table-layout:fixed;margin:0;border:2px solid var(--ba-ink);font-family:inherit}.ba-sudoku #root .game__cell{height:48px;text-align:center;padding:0;font-size:24px;font-weight:600;touch-action:manipulation;border-color:#d9e4ec}.ba-sudoku #root .game__cell:nth-child(3n){border-right:2px solid var(--ba-ink)}.ba-sudoku #root .game__cell:not(.game__cell--filled):not(.game__cell--userfilled){font-size:0}.ba-sudoku #root .game__row:nth-child(3n){border-bottom:2px solid var(--ba-ink)}.ba-sudoku #root .game__cell:focus-visible{outline:3px solid var(--ba-accent);outline-offset:-3px}.ba-sudoku #root .status{display:flex;flex-direction:column;gap:13px}.ba-sudoku #root .status__difficulty,.ba-sudoku #root .status__time,.ba-sudoku #root .status__numbers,.ba-sudoku #root .status__actions{position:static;top:auto;left:auto;width:100%;margin:0}.ba-sudoku #root .status__difficulty-text{font-size:12px;line-height:1.5;margin-bottom:6px}.ba-sudoku #root .status__difficulty-select{width:100%;border:1px solid #dfe8ed;border-radius:10px;padding:9px 28px 9px 12px;font-family:inherit;font-size:13px;line-height:1.5;color:var(--ba-ink);background-color:#f8fafc}.ba-sudoku #root .status__time{border-radius:10px;background:#f3f8fb;padding:10px 5px;font-family:inherit;font-size:21px;letter-spacing:.08em;color:var(--ba-ink);text-align:center}.ba-sudoku #root .status__numbers{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;background:none}.ba-sudoku #root .status__number{padding:10px 0;background:#f3f8fb;border-radius:9px;font-family:inherit;font-size:20px;font-weight:600;touch-action:manipulation}.ba-sudoku #root .status__number:hover,.ba-sudoku #root .status__number--selected{background:var(--color-orange);color:var(--ba-dark)}.ba-sudoku #root .status__actions{display:grid;grid-template-columns:repeat(3,1fr);gap:13px 3px}.ba-sudoku #root .status__action-undo,.ba-sudoku #root .status__action-erase,.ba-sudoku #root .status__action-hint{width:auto;min-height:70px;padding:8px 0;background:#f8fafc;border-radius:9px;touch-action:manipulation}.ba-sudoku #root .status__action-svg{top:9px;width:25px;height:25px}.ba-sudoku #root .status__action-text{padding-top:34px;font-size:10px;font-weight:600;line-height:1.3;overflow-wrap:anywhere}.ba-sudoku #root .status__action-mistakes-mode,.ba-sudoku #root .status__action-fast-mode{grid-column:1/-1;width:100%;min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:8px;text-align:left}.ba-sudoku #root .status__action-mistakes-mode .status__action-text,.ba-sudoku #root .status__action-fast-mode .status__action-text{padding:0;font-size:11px;order:-1;max-width:90px}.ba-sudoku #root .status__action-mistakes-mode-switch,.ba-sudoku #root .status__action-fast-mode-switch{position:relative;left:auto;top:auto;transform:none;flex-shrink:0;width:40px;height:24px;margin:0}.ba-sudoku #root .status__action-mistakes-mode-slider:before,.ba-sudoku #root .status__action-fast-mode-slider:before{width:18px;height:18px;bottom:3px}.ba-sudoku #root input:checked+.status__action-mistakes-mode-slider:before,.ba-sudoku #root input:checked+.status__action-fast-mode-slider:before{transform:translateX(16px)}.ba-sudoku #root .overlay{z-index:1100;background:#18243bcc}.ba-sudoku #root .overlay__text{font-family:inherit;font-size:clamp(28px,5vw,54px);color:#fff;padding:20px}.ba-sudoku-article{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:26px;align-items:start}.ba-sudoku-article aside{position:sticky;top:95px}.ba-sudoku-article aside h2{font-size:27px}.ba-sudoku-article .ba-button{margin-top:22px}.ba-sudoku-article .ba-text-link{display:block;color:#7de1c9}.ba-print-levels{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.ba-print-level{padding:26px 21px;border:1px solid #dfe8ed;border-radius:18px;background:#fff;transition:transform .18s,border-color .18s}.ba-print-level:hover{transform:translateY(-3px);border-color:var(--ba-accent)}.ba-print-level h2{font-size:21px;margin:25px 0 10px}.ba-print-level p{font-size:13px}.ba-level-dots{display:flex;gap:5px}.ba-level-dots i{width:12px;height:12px;border-radius:50%;background:#e4ebf0}.ba-level-dots i.filled{background:var(--ba-accent)}
@media(max-width:1100px){.ba-sudoku-workspace{grid-template-columns:minmax(0,1fr) 280px;gap:20px}.ba-sudoku-game{padding:22px}.ba-sudoku #root .innercontainer{grid-template-columns:minmax(0,1fr) 135px;gap:15px}.ba-sudoku #root .game__cell{height:42px;font-size:22px}.ba-print-levels{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:950px){.ba-sudoku-workspace{grid-template-columns:1fr}.ba-sudoku-aside{grid-template-columns:1fr 1fr}.ba-sudoku #root .innercontainer{grid-template-columns:minmax(0,1fr) 200px;gap:28px}.ba-sudoku #root .game__cell{height:55px}.ba-sudoku #root .status__action-text{font-size:11px}.ba-sudoku #root .status__action-mistakes-mode .status__action-text,.ba-sudoku #root .status__action-fast-mode .status__action-text{max-width:none;font-size:12px}.ba-sudoku-article{grid-template-columns:1fr}.ba-sudoku-article aside{position:static}}
@media(max-width:670px){.ba-sudoku-game{padding:20px}.ba-sudoku-game-heading{display:block}.ba-sudoku-game-heading>span{display:inline-block;margin-top:12px}.ba-sudoku #root .innercontainer{grid-template-columns:1fr;gap:18px}.ba-sudoku #root .game{display:block}.ba-sudoku #root .game__cell{height:48px;font-size:24px}.ba-sudoku #root .status{display:grid;grid-template-columns:1fr 105px;gap:12px}.ba-sudoku #root .status__difficulty{width:100%}.ba-sudoku #root .status__difficulty-text{display:inline-block;margin-right:10px;font-size:12px}.ba-sudoku #root .status__difficulty-select{width:auto;max-width:100%;font-size:12px}.ba-sudoku #root .status__time{align-self:center;font-size:18px;padding:9px}.ba-sudoku #root .status__numbers{grid-column:1/-1;grid-template-columns:repeat(9,1fr);gap:4px}.ba-sudoku #root .status__number{padding:11px 0;font-size:19px}.ba-sudoku #root .status__actions{grid-column:1/-1;grid-template-columns:repeat(3,1fr);gap:13px}.ba-sudoku #root .status__action-text{font-size:12px}.ba-sudoku #root .status__action-undo,.ba-sudoku #root .status__action-erase,.ba-sudoku #root .status__action-hint{min-height:72px}.ba-sudoku #root .status__action-mistakes-mode,.ba-sudoku #root .status__action-fast-mode{grid-column:auto;grid-column:1/-1}.ba-sudoku-aside{grid-template-columns:1fr}.ba-print-levels{grid-template-columns:repeat(2,minmax(0,1fr))}.ba-sudoku-nav a{padding:9px 13px;font-size:12px}}
@media(max-width:380px){.ba-sudoku-game{padding:14px}.ba-sudoku #root .game__cell{height:33px;font-size:19px}.ba-sudoku #root .status{grid-template-columns:1fr 85px}.ba-sudoku #root .status__difficulty-text{display:block;margin-bottom:4px}.ba-sudoku #root .status__number{font-size:16px}.ba-print-levels{grid-template-columns:1fr}}
/* Keep the board square at every size; compact desktop actions stay readable. */
.ba-sudoku #root .game{container-type:inline-size}
@supports(height:1cqw){.ba-sudoku #root .game__cell{height:calc(100cqw / 9)}}
@media(min-width:671px){.ba-sudoku #root .status__actions{grid-template-columns:1fr;gap:8px}.ba-sudoku #root .status__actions>[role="button"]{display:flex;align-items:center;justify-content:flex-start;gap:10px;padding:10px;min-height:40px}.ba-sudoku #root .status__actions>[role="button"] .status__action-svg{position:static;transform:none;width:20px;height:20px;flex-shrink:0}.ba-sudoku #root .status__actions>[role="button"] .status__action-text{padding:0;font-size:11px;white-space:nowrap}}
@media(max-width:380px){.ba-sudoku #root .status__action-text{font-size:11px}}