:root{--ink:#243e35;--green:#476b51;--paper:#f6f4ef;--muted:#727b70;--line:#dfe4d9;--soft:#e8eedf;--light:#e8ebd5;--dark:#87a27c;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #bd913e;outline-offset:4px}button:disabled{opacity:.4;cursor:default}button{border:0}a{color:inherit}button:hover:not(:disabled){filter:brightness(.97)}[hidden]{display:none!important}.top{height:90px;border-bottom:1px solid var(--line);max-width:1240px;margin:auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:700;letter-spacing:-1px;text-decoration:none}.brandmark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--ink);color:var(--paper);font-size:33px;font-weight:400}.prototype{letter-spacing:1.5px;font-size:9px;color:var(--muted);font-weight:500;margin-left:8px;padding-top:4px}nav{display:flex;align-items:center;gap:20px}.quiet{background:none;font-size:13px;font-weight:550}.icon{background:none;font-size:23px;width:40px;height:40px;border-radius:50%;display:grid;place-items:center}.apk{text-decoration:none;font-size:12px;color:var(--muted)}main{max-width:1120px;margin:auto;padding:38px 40px 0}.intro{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:650;color:var(--muted);margin:0 0 10px}h1{font-size:39px;letter-spacing:-1.6px;line-height:1.15;font-weight:600;margin:0 0 12px}.sub{font-size:14px;color:var(--muted);line-height:1.6;margin:0}.intro-note{font-size:11px;color:var(--muted);display:flex;gap:7px;align-items:center}.dot{height:6px;width:6px;background:#7c9c6b;border-radius:50%}.workspace{display:grid;grid-template-columns:minmax(300px,550px) minmax(280px,1fr);gap:46px;align-items:start}.board-label{height:35px;display:flex;justify-content:space-between;align-items:start;font-size:12px;font-weight:550}.side-dot{display:inline-block;border:1px solid var(--ink);background:#fff;border-radius:50%;width:11px;height:11px;margin-right:7px}.side-dot.black{background:var(--ink)}.rating{background:var(--soft);color:var(--green);padding:5px 10px;border-radius:7px;font-size:11px;font-weight:650;margin-top:-4px}#board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;border-radius:10px;overflow:hidden;box-shadow:0 0 0 1px #aebf9f,0 10px 25px #293e3010;touch-action:manipulation}.square{position:relative;display:flex;justify-content:center;align-items:center;background:var(--light);padding:0;aspect-ratio:1;min-width:0;overflow:hidden}.square.dark{background:var(--dark)}.square.last{background:#d7dfa0}.square.dark.last{background:#9aae78}.square.selected,.square.candidate{background:#e6ce78}.square.check{background:#e6a396}.piece{font-family:"DejaVu Sans","Segoe UI Symbol","Noto Sans Symbols 2",serif;font-size:clamp(26px,4.4vw,53px);line-height:1;color:#233c33;user-select:none;pointer-events:none;text-shadow:0 1px 1px #0002;-webkit-text-stroke:.45px #e8ecd8}.piece.white{color:#fffef5;-webkit-text-stroke:1.2px #243e34;text-shadow:0 2px 1px #243e3425}.coord{position:absolute;z-index:2;font-size:10px;font-weight:650;color:#567148;pointer-events:none}.dark .coord{color:#f3f5e6}.rank{top:3px;left:4px}.file{bottom:3px;right:5px}.legal:after{content:"";width:12px;height:12px;position:absolute;background:#243e3540;border-radius:50%;pointer-events:none}.legal.occupied:after{inset:3px;width:auto;height:auto;border:3px solid #243e3550;background:none}.board-footer{display:flex;justify-content:space-between;margin-top:14px;font-size:10px;letter-spacing:.9px;color:var(--muted)}.coach{padding-top:35px}.filter-button{width:100%;display:flex;align-items:center;text-align:left;padding:16px;background:#fff;border:1px solid var(--line);border-radius:14px;gap:13px}.filter-symbol{font-size:25px;color:var(--green)}.filter-button strong{display:block;font-size:14px;font-weight:600}.filter-button small{display:block;font-size:11px;margin-top:5px;color:var(--muted)}.chevron{margin-left:auto;font-size:23px;color:var(--muted)}.coach-title{padding:30px 0 18px}.coach-title h2{font-size:23px;letter-spacing:-.6px;font-weight:550;margin:10px 0}.coach-title p{font-size:13px;line-height:1.7;color:var(--muted);margin:0}.actions{display:flex;gap:10px}.actions button{flex:1;font-size:13px}.tonal,.outline,.primary{padding:15px 10px;min-height:48px;border-radius:12px;font-weight:550}.tonal{background:var(--soft)}.outline{background:transparent;border:1px solid #d4ddcf}.primary{background:var(--ink);color:#fff;width:100%;font-size:14px}.text-button{display:block;width:100%;background:none;font-size:12px;padding:13px}.feedback{font-size:13px;line-height:1.65;background:#eeece3;border-radius:12px;padding:14px;margin:0 0 16px}.feedback.success{background:var(--soft)}.hintbox{background:var(--soft);border-radius:12px;padding:16px;margin-bottom:16px}.hintbox p{font-size:13px;line-height:1.65;margin:8px 0 0}.hintbox .eyebrow{color:var(--green)}.practice-note{border-top:1px solid var(--line);margin-top:25px;padding-top:22px;display:flex;gap:12px;align-items:center}.practice-note>span{display:grid;place-items:center;width:25px;height:25px;background:var(--soft);border-radius:50%;color:var(--green);font-size:13px}.practice-note p{font-size:12px;line-height:1.7;color:var(--muted);margin:0}.sessionline{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:24px;gap:8px}.tiny-dots{color:#b7c8ab;letter-spacing:3px;font-size:7px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:19px 0;margin-top:38px;color:var(--muted);font-size:10px}.solution{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:16px;font-size:14px}.solution p{font-size:12px;color:var(--muted);line-height:1.7}.stepper{display:flex;justify-content:space-between;align-items:center;margin-top:16px}.stepper button{border:1px solid var(--line);border-radius:10px;width:40px;height:36px;background:var(--soft);font-size:19px}.stepper span{font-size:12px;color:var(--muted)}#notation{font-weight:650;line-height:1.9}dialog{border:1px solid var(--line);border-radius:22px;width:min(440px,calc(100% - 24px));padding:26px;background:var(--paper);color:var(--ink);max-height:90dvh;overflow:auto;box-shadow:0 25px 90px #14271c30}dialog::backdrop{background:#12251b66;backdrop-filter:blur(4px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}.dialog-heading h2{font-size:23px;letter-spacing:-.6px;font-weight:600;margin:0 0 8px}.dialog-heading .icon{margin-top:-12px;margin-right:-10px}.field-title{display:block;font-size:13px;font-weight:600;margin:25px 0 12px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chips button{background:transparent;border:1px solid var(--line);padding:10px 12px;border-radius:10px;font-size:12px}.chips button.active{background:var(--ink);color:#fff;border-color:var(--ink)}.range-inputs{display:flex;align-items:center;gap:15px}.range-inputs label{font-size:11px;color:var(--muted);flex:1}.range-inputs input{width:100%;margin-top:6px;border:1px solid var(--line);border-radius:9px;padding:10px;background:#fff;color:var(--ink)}.small{font-size:11px;line-height:1.7;color:var(--muted)}.review-toggle{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:20px;margin-top:20px;font-size:13px}.review-toggle small{display:block;font-size:11px;color:var(--muted);margin-top:6px}.review-toggle input{width:20px;height:20px;accent-color:var(--green)}#available{margin:20px 0}#stats{font-size:16px;line-height:1.8;margin:18px 0}#stats strong{font-size:30px}.history-row{display:flex;justify-content:space-between;padding:13px 0;border-top:1px solid var(--line);font-size:12px}.history-row small{color:var(--muted)}#aboutDialog p{font-size:13px;line-height:1.75}#error{position:fixed;bottom:12px;left:12px;right:12px;background:#fff0dc;border:1px solid #c7a46a;padding:12px;border-radius:10px;font-size:12px;z-index:10}
@media(min-width:1400px){main{padding-top:55px}.intro{margin-bottom:35px}.workspace{gap:55px}}
@media(max-width:760px){.top{height:72px;padding:0 20px}.brand{font-size:22px}.prototype{display:none}nav{gap:8px}.apk span{display:none}.apk{font-size:20px}.quiet{font-size:12px}main{padding:27px 20px 0}.intro{margin-bottom:24px}.intro-note{display:none}h1{font-size:31px}.eyebrow{font-size:9px;letter-spacing:1.3px}.sub{font-size:12px}.workspace{display:flex;flex-direction:column;gap:20px}.board-column{width:100%}.piece{font-size:clamp(26px,8vw,55px)}.coach{padding:0;width:100%}.coach-title{display:none}.filter-button{margin-bottom:16px}.practice-note{margin-top:18px}.sessionline{margin-top:16px}.board-footer{font-size:9px}.coord{font-size:9px}footer{margin-top:25px;font-size:9px}footer span:last-child{display:none}.feedback{margin-bottom:14px}}
@media(prefers-reduced-motion:no-preference){button{transition:background-color .15s,filter .15s}}
.piece{width:100%;height:100%;object-fit:contain;user-select:none;pointer-events:none}.piece.white,.piece.black{filter:none}
#board{touch-action:none}.drag-source{opacity:.35}.piece-ghost{position:fixed;z-index:20;width:clamp(40px,7vw,68px);height:clamp(40px,7vw,68px);pointer-events:none;will-change:transform}
.piece-ghost{top:0;left:0}
#board .square{background:#f0d9b5}#board .square.dark{background:#b58863}#board .square.last{background:#e7c98d}#board .square.dark.last{background:#9d845b}


#board .square.hint-origin{background:#f5d33c;box-shadow:inset 0 0 0 4px #805400;z-index:1}#board .square.hint-origin .piece{filter:drop-shadow(0 0 4px #fff)}#winDialog{border:2px solid var(--green);text-align:center;padding:30px}#winDialog .dialog-heading{justify-content:center}#winDialog #winResult{font-size:16px;margin:18px 0 24px}#winDialog .primary{font-size:16px}
.eyebrow-line{display:flex;align-items:center;gap:10px;margin-bottom:8px}.eyebrow-line .eyebrow{margin:0}.filter-button{width:34px;height:34px;min-width:34px;padding:0;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--green);font-size:17px}.filter-button span{line-height:1}.board-label{height:27px}.coach{padding-top:0}.practice-note{margin-top:14px;padding-top:12px}.sessionline{margin-top:12px}footer{margin-top:18px;padding:12px 0}
@media(max-width:760px){.top{height:58px;padding:0 16px}.brandmark{width:32px;height:32px;font-size:27px}.brand{font-size:20px}main{padding:10px 16px 0}.intro{margin-bottom:10px}h1{font-size:26px;margin:0 0 3px}.eyebrow-line{gap:8px;margin-bottom:3px}.filter-button{width:32px;height:32px;min-width:32px}.eyebrow{font-size:9px;letter-spacing:1px}.sub{font-size:11px;line-height:1.3}.workspace{gap:10px}.board-label{height:22px;font-size:11px}.rating{padding:3px 7px;margin-top:-2px}#board{max-width:min(100%,calc(100dvh - 420px));margin:0 auto}.board-footer{margin-top:7px}.coach{display:grid;grid-template-columns:1fr;gap:0}.coach-title{display:none}.practice-note,.sessionline,footer{display:none}.actions{gap:8px}.tonal,.outline,.primary{min-height:44px;padding:10px}.hintbox{padding:10px;margin:0 0 8px}.hintbox p{font-size:12px;line-height:1.4;margin:4px 0 0}.feedback{padding:9px;margin:0 0 8px;font-size:12px;line-height:1.4}.solution{padding:12px;margin:0 0 8px}.workspace .coach{width:100%}}
@media(max-width:760px) and (max-height:760px){#board{max-width:min(100%,calc(100dvh - 395px))}.top{height:52px}main{padding-top:7px}.intro{margin-bottom:7px}.workspace{gap:7px}}


.eyebrow-line .filter-button{margin:0}

.feedback.illegal,.feedback.incorrect{background:#f8e5e1;border:1px solid #c45b4a;color:#742c23}.feedback.unverified{background:#f5efd9;border:1px solid #c6a44b;color:#624b17}.feedback.success{background:var(--soft)}.error-square{box-shadow:inset 0 0 0 4px #bd4939!important}.problem-picker{border-top:1px solid var(--line);margin-top:16px;padding-top:12px}.problem-picker h3{font-size:15px;margin:0}.problem-choices{max-height:30vh;overflow:auto;display:grid;gap:5px}.problem-choice{display:grid;grid-template-columns:1fr 1fr 1fr auto;gap:6px;align-items:center;text-align:left;background:#fff;border:1px solid var(--line);border-radius:8px;padding:9px;font-size:12px;min-height:42px}.problem-choice strong{font-weight:600}.rating{white-space:nowrap;font-size:10px;padding:5px 7px}.eyebrow-line{display:flex;align-items:center;gap:12px}.eyebrow-line .eyebrow{margin:0}.filter-button{width:40px;height:40px;min-width:40px;justify-content:center;padding:0;border-radius:50%;font-size:20px;color:var(--green);background:transparent}
@media(max-width:760px){.eyebrow-line{margin-bottom:9px}.intro{margin-bottom:16px}.board-footer{margin-top:15px}}@media(max-width:760px) and (max-height:760px){.intro{margin-bottom:13px}}
.eyebrow-line{width:100%}.eyebrow-line .eyebrow{order:1}.eyebrow-line .filter-button{order:2;margin-left:auto}

.eyebrow-line{width:100%}.eyebrow-line .eyebrow{order:1}.eyebrow-line .filter-button{order:2;margin-left:auto}

@media(max-width:760px){.intro>div:first-child{flex:1;min-width:0}}
.library-stats{padding:10px 12px;border-radius:10px;background:var(--soft);font-size:12px;line-height:1.5;font-weight:600;margin:8px 0 12px}.library-filters{display:grid;grid-template-columns:1fr 1fr;gap:8px}.library-filters label{font-size:11px;color:var(--muted)}.library-filters input,.library-filters select{width:100%;margin-top:4px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font:inherit;font-size:12px}.library-list{margin-top:10px;max-height:min(45dvh,420px);overflow:auto;border-top:1px solid var(--line)}.library-list.empty{padding:18px 4px;color:var(--muted);font-size:13px}.library-row{display:flex;align-items:center;gap:10px;padding:9px 2px;border-bottom:1px solid var(--line)}.library-info{display:grid;gap:3px;min-width:0;flex:1}.library-info strong{font-size:12px}.library-info small{font-size:10px;color:var(--muted)}.library-info .library-state{color:var(--green)}.library-select{padding:8px 10px;border-radius:8px;background:var(--soft);font-size:11px;white-space:nowrap}.library-continue{margin-top:12px}
@media(max-width:760px){.top{padding:0 16px;height:68px}nav{gap:8px}.apk{display:none}.top .quiet{font-size:11px;padding:6px}.top .icon{width:32px;height:32px;font-size:19px}#libraryDialog{padding:18px;width:min(440px,calc(100% - 16px));max-height:94dvh}.library-list{max-height:38dvh}}
@media(max-width:400px){.top{padding:0 10px}nav{gap:3px}.brand{font-size:20px;gap:7px}.brandmark{width:32px;height:32px;font-size:28px}.prototype{display:none}.top .quiet{font-size:10px;padding:5px 4px}}

.more-nav{position:relative}.more-nav summary{list-style:none;cursor:pointer;font-size:13px;font-weight:550;padding:7px 5px}.more-nav summary::-webkit-details-marker{display:none}.more-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:20;min-width:160px;padding:6px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 25px #1f302322}.more-menu button{display:block;width:100%;text-align:left;background:none;border-radius:7px;padding:10px 12px;font-size:12px}.learning-dialog{padding:16px;width:min(900px,calc(100% - 24px));max-width:900px;max-height:94dvh;overflow:auto}.learning-dialog::backdrop{background:#23372cb3}@media(max-width:760px){.more-nav summary{font-size:11px;padding:6px 4px}.learning-dialog{padding:12px;width:calc(100% - 16px);max-height:94dvh}}@media(max-width:400px){.more-nav summary{font-size:10px;padding:5px 3px}}
.machine-dialog{padding:16px;width:min(850px,calc(100% - 24px));max-width:850px;max-height:94dvh;overflow:auto}.machine-dialog::backdrop{background:#23372cb3}@media(max-width:760px){.machine-dialog{padding:12px;width:calc(100% - 16px);max-height:94dvh}}#board{position:relative}.piece.motion-hidden{visibility:hidden!important}.piece-motion{position:absolute;z-index:5;pointer-events:none;will-change:transform}
@media(prefers-reduced-motion:no-preference){.piece-motion{transition:transform 240ms cubic-bezier(.2,.75,.25,1)}}
.app-bottom-nav{display:none}
.app-bottom-nav[hidden]{display:none!important}
.nav-dialog{width:min(520px,calc(100% - 20px));max-height:92dvh;padding:18px 16px 84px;background:var(--paper);border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 50px #18372a30}
.nav-dialog::backdrop{background:#142d25a8}
.nav-action{display:flex;width:100%;flex-direction:column;align-items:flex-start;gap:3px;margin:8px 0;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);text-align:left}
.nav-action span{font-size:15px;font-weight:650}.nav-action small{font-size:11px;color:var(--muted)}
#machineEntryOptions h3{margin:6px 2px 12px;font-size:18px}
.library-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:10px 0 14px}
.library-metric{padding:10px;border:1px solid var(--line);border-radius:11px;background:#fff;line-height:1.3}
.library-metric strong{display:block;font-size:20px;color:var(--ink)}.library-metric small{font-size:10px;color:var(--muted)}
.library-row{align-items:center;min-height:78px;margin:8px 2px;padding:12px;border:1px solid var(--line);border-radius:13px;background:#fffaf1}
.library-row.current{border-color:var(--green);box-shadow:inset 3px 0 var(--green)}
.library-row .library-info strong{font-size:14px;line-height:1.25}.library-row .library-info small{font-size:11px}
.library-row .library-state{display:inline-flex;align-self:flex-start;width:max-content;padding:3px 8px;border-radius:99px;background:var(--soft);font-size:10px;font-weight:650}
.library-row .library-state.pending{background:#f0ece2}.library-row .library-state.review{background:#f6e4bd}.library-row .library-state.solved{background:#dce9d8}.library-row .library-state.current-state{background:#dce9d8}
#stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0}
.progress-metric{padding:12px 9px;border:1px solid var(--line);border-radius:12px;background:#fffaf1}
.progress-metric strong{display:block;font-size:24px;color:var(--ink)}.progress-metric small{font-size:10px;color:var(--muted)}
#continueCurrent{width:100%;margin:4px 0 12px}
.last-problem{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:10px;padding:12px;border:1px solid var(--line);border-radius:13px;background:#fffaf1}
.last-problem>div{display:grid;gap:4px;min-width:0}
.last-problem>div strong{font-size:15px;line-height:1.25}
.last-problem>div small{font-size:10px;color:var(--muted);line-height:1.35}
.last-problem-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--soft);color:var(--green)}
#lastProblemMeta{overflow-wrap:anywhere}
.history-row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 2px;border-bottom:1px solid var(--line);font-size:12px}
.history-row small{color:var(--muted);text-align:right}
@media(max-width:760px){
 body{padding-bottom:calc(66px + env(safe-area-inset-bottom))}
 .top{height:54px;padding:0 14px}.top nav{gap:4px}.top nav>.apk,.top nav>#libraryOpen,.top nav>#moreNav,.top nav>#progress{display:none}
 .app-bottom-nav{position:fixed;z-index:1000;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);height:calc(62px + env(safe-area-inset-bottom));padding:5px 8px env(safe-area-inset-bottom);border-top:1px solid #dfded5;background:#fffaf2f5;backdrop-filter:blur(12px)}
 .app-bottom-nav button{display:flex;min-width:0;flex-direction:column;align-items:center;justify-content:center;gap:3px;border:0;border-radius:12px;background:transparent;color:#737a71;font:inherit;font-size:10px;font-weight:550}
 .app-bottom-nav button[aria-current=page]{background:#e5ecdf;color:var(--green);font-weight:700}
 .app-bottom-nav svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
 .app-bottom-nav svg circle{fill:currentColor;stroke:none}
 #libraryDialog,#progressDialog,.nav-dialog{width:calc(100% - 12px);max-height:94dvh;padding:16px 12px calc(80px + env(safe-area-inset-bottom));border-radius:16px}
 #libraryDialog .library-list{max-height:34dvh;margin-top:6px}.library-row{min-height:72px;margin:6px 1px;padding:9px}
 #libraryDialog .library-filters{gap:6px}.library-filters label{font-size:10px}.library-filters input,.library-filters select{padding:7px;font-size:11px}
 #progressDialog #history{max-height:36dvh;overflow:auto}
 .nav-dialog .nav-action{padding:12px}
 main{padding-bottom:8px}
}
@media(max-width:380px){.library-metrics,.progress-metric{gap:5px}.library-metric{padding:8px 6px}.library-metric strong,.progress-metric strong{font-size:18px}.library-row .library-info strong{font-size:13px}.library-row .library-info small{font-size:10px}}
@media(min-width:761px){.nav-dialog{padding:22px}}

@media(prefers-reduced-motion:no-preference){.piece-motion{transition:transform 280ms cubic-bezier(.42,0,.58,1)}}

.promotion-picker{position:absolute;z-index:40;width:25%;display:grid;grid-template-rows:auto 1fr;padding:3px;border:1px solid #667b5e;border-radius:9px;background:#fffaf1;box-shadow:0 4px 14px #1b2c2355;touch-action:manipulation}
.promotion-picker-head{display:flex;align-items:center;justify-content:space-between;gap:3px;min-height:18px;padding:0 2px 2px;font-size:9px;font-weight:650;color:var(--ink)}
.promotion-picker-cancel{display:grid;place-items:center;width:22px;height:20px;min-width:22px;padding:0;border-radius:6px;background:#e8eedf;font-size:16px;line-height:1}
.promotion-picker-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));aspect-ratio:1;gap:2px}
.promotion-choice{display:grid;place-items:center;min-width:0;min-height:0;padding:2px;border:1px solid #e0e2d6;border-radius:6px;background:#f4f1e8}
.promotion-choice:focus-visible{outline-offset:-2px}
.promotion-choice .piece{width:100%;height:100%;object-fit:contain;pointer-events:none}