:root{--bg:#f7faf6;--surface:#ffffff;--header-bg:#ffffff;--ink:#243b35;--muted:#5c726b;--line:#dce9df;--green:#237354;--green2:#e9f6ec;--gold:#946020;--red:#a64747;--shadow:0 8px 28px rgba(38,86,61,.055);color-scheme:light}
*{box-sizing:border-box}html{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}body{margin:0;min-height:100vh}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}button,.button{appearance:none;border:0;border-radius:8px;background:var(--green);color:white;padding:.72rem 1rem;font:inherit;font-weight:700;cursor:pointer;display:inline-block}button:hover,.button:hover{filter:brightness(1.08);text-decoration:none}.secondary{background:transparent!important;color:var(--green)!important;border:1px solid var(--line)!important}.danger{color:var(--red)!important}.mini{font-size:.78rem;padding:.4rem .55rem}.site-header{height:68px;padding:0 max(24px,calc((100vw - 1180px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--header-bg);position:sticky;top:0;z-index:10}.brand{font-family:inherit;font-size:1.45rem;font-weight:700;color:var(--ink)}main{max-width:1180px;margin:auto;padding:54px 24px 80px}footer{border-top:1px solid var(--line);padding:28px;text-align:center;color:var(--muted);font-size:.85rem}.hero{max-width:850px;padding:20px 0 48px}.hero h1,.page-title h1,.summary-hero h1{font:700 clamp(2.4rem,4.5vw,3.8rem)/1.1 ui-rounded, "Avenir Next", system-ui, sans-serif;margin:.2rem 0 1.2rem;letter-spacing:-.04em}.hero p:not(.eyebrow){font-size:1.2rem;line-height:1.6;color:var(--muted);max-width:620px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-weight:800;font-size:.72rem;color:var(--gold);margin:0 0 .65rem}.section-heading,.page-title,.training-top{display:flex;align-items:end;justify-content:space-between;gap:2rem;margin-bottom:24px}.page-title{padding:18px 0 28px;align-items:center}.page-title h1{font-size:3.2rem}.page-title p{color:var(--muted)}h2{font:700 1.6rem ui-rounded, "Avenir Next", system-ui, sans-serif}h3{font-size:1.25rem}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.card,.panel,.empty{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:var(--shadow)}.card h3{margin:.8rem 0 .4rem}.card p,.muted{color:var(--muted)}.color-chip{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:900;border:2px solid var(--ink)}.color-chip.black{background:#252923;color:white}.color-chip.white{background:#fff}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.back{display:inline-block;margin-bottom:18px}.split{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(280px,.7fr);gap:28px}.stack{display:grid;gap:10px}.list-row{padding:15px 17px;border:1px solid var(--line);background:var(--surface);border-radius:9px;display:flex;align-items:center;justify-content:space-between;gap:12px}.list-row>a{display:grid;flex:1}.list-row span{color:var(--muted);font-size:.85rem}.form-stack{display:grid;gap:18px}.form-stack label{display:grid;gap:7px;font-size:.85rem;font-weight:700}input,select,textarea{width:100%;border:1px solid #bbb8ae;border-radius:7px;background:white;color:var(--ink);font:inherit;padding:.7rem}.training-shell{max-width:1100px;margin:auto}.training-grid{display:grid;grid-template-columns:minmax(460px,650px) minmax(280px,1fr);gap:34px;align-items:start}.training-board-column{min-width:0}.board{width:min(100%,650px);margin-inline:auto;box-shadow:var(--shadow);border:6px solid #d6e7d9;border-radius:12px;overflow:hidden}.board-help{text-align:center;color:var(--muted);font-size:.82rem}.turn{padding:.6rem .8rem;background:var(--green2);color:var(--green);font-weight:700;border-radius:20px}.study-panel{display:grid;gap:15px}.move-panel,.feedback,.hint{padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:10px}.move-panel h2,.feedback h2{margin-top:0}.moves{display:grid;grid-template-columns:2rem 1fr 1fr;gap:.4rem .6rem;max-height:160px;overflow:auto;font-family:ui-monospace,monospace}.number{color:var(--muted)}.feedback{border-left:5px solid var(--line)}.feedback.correct{border-color:var(--green);background:var(--green2)}.feedback.mistake{border-color:var(--gold);background:#fff4d9}.feedback.error{border-color:var(--red);background:#f9e3e0}.hint{border-color:var(--gold)}.intent{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}.hidden{display:none!important}.text-button{background:transparent;padding:1rem 0}.selected-square{box-shadow:inset 0 0 0 5px rgba(246,192,68,.9)}.summary-hero{text-align:center;max-width:800px;margin:40px auto}.score-ring{width:180px;height:180px;border:12px solid var(--green);border-radius:50%;display:grid;place-content:center;margin:32px auto}.score-ring strong{font-size:2.3rem}.score-ring span{font-size:.75rem;color:var(--muted)}.center{justify-content:center}.editor-board-grid{display:grid;grid-template-columns:minmax(430px,600px) minmax(300px,1fr);gap:32px}.stepper{display:flex;justify-content:space-between;align-items:center;margin:18px 0}.disabled{pointer-events:none;opacity:.4}.position-data{font-size:.84rem}.position-data dt{font-weight:bold}.position-data dd{margin:3px 0 12px;word-break:break-all;color:var(--muted)}.history{padding-left:1.2rem;color:var(--muted);font-size:.8rem}
@media(max-width:850px){.training-grid,.split,.editor-board-grid{grid-template-columns:1fr}.training-grid{max-width:650px;margin:auto}.site-header{padding:0 18px}main{padding:35px 16px}.page-title{align-items:flex-start;flex-direction:column}.board{width:100%}}

.inline-form{display:inline-flex}.last-move-square{box-shadow:inset 0 0 0 1000px rgba(244,194,65,.38)!important}.selected-square{outline:5px solid rgba(246,192,68,.9);outline-offset:-5px;box-shadow:none}
.legal-target,.legal-capture{position:relative}.legal-target::after,.legal-capture::after{content:"";position:absolute;z-index:4;pointer-events:none;border-radius:50%}.legal-target::after{width:27%;height:27%;left:36.5%;top:36.5%;background:rgba(20,27,22,.28)}.legal-capture::after{inset:5px;border:6px solid rgba(20,27,22,.25)}
/* chessboard.js also places dragged and animated pieces directly under body. */
.piece-417db{position:relative;z-index:5}
.hint-piece-square{outline:5px solid rgba(238,156,36,.95);outline-offset:-5px;animation:hint-pulse 1.1s ease-in-out infinite alternate}.hint-piece-square .piece-417db{filter:drop-shadow(0 0 5px rgba(255,190,55,.95))}@keyframes hint-pulse{from{outline-color:rgba(238,156,36,.65)}to{outline-color:rgba(255,210,75,1)}}
.dialog-error{padding:.7rem .8rem;border-radius:7px;background:#f9e3e0;color:var(--red)!important;font-weight:650}button:disabled{cursor:wait;opacity:.65}
.line-result-card{padding:22px;background:var(--surface);border:1px solid var(--line);border-top:5px solid var(--green);border-radius:10px;box-shadow:var(--shadow)}.line-result-card h2{margin:.25rem 0 .8rem}.line-result-actions{margin-top:18px}.line-result-actions button{flex:1}.engine-evaluation{margin-top:18px;padding:16px;border-radius:9px;background:var(--green2)}.engine-evaluation h3{font:700 1.65rem ui-rounded, "Avenir Next", system-ui, sans-serif;margin:.2rem 0}.engine-evaluation p:last-child{margin-bottom:0}
.training-stats{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 18px;margin:0 0 12px;color:var(--muted);font-size:.82rem;line-height:1.5;font-variant-numeric:tabular-nums}.training-stats>span{white-space:nowrap}.training-stats strong{display:inline-block;min-width:2ch;font-weight:700;color:var(--ink)}.training-stats #stat-help{color:var(--gold)}
#intent-wrap:not(.hidden)+.hint-objective{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}
.training-shell[data-run-kind="tutorial"] .feedback:not(.error){display:none}
.board-preview-note{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--muted);font-size:.85rem}.board-preview-note strong{color:var(--ink)}
.editor-board-grid{transition:opacity .15s ease}.editor-board-grid.is-loading{opacity:.55;pointer-events:none}
.tutorial-start{display:grid;grid-template-columns:minmax(190px,1fr) auto;gap:7px;align-items:end}.tutorial-start label{grid-column:1/-1;color:var(--muted);font-size:.78rem;font-weight:700}.tutorial-nav{display:grid;gap:7px;padding:15px 18px;background:var(--surface);border:1px solid var(--line);border-radius:10px}.tutorial-nav label{font-size:.78rem;font-weight:800;color:var(--muted)}
.training-top h1 a{color:inherit}
/* Compact, stable training heading; progress belongs beside the lesson selector. */
.training-page .site-header{height:52px}.training-page main{padding-top:12px}.training-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,32%);align-items:center;gap:16px;min-height:56px;margin-bottom:12px}.training-top>div{min-width:0}.training-top h1{font-size:clamp(1.35rem,2.5vw,2rem);line-height:1.15;margin:0}.training-top .eyebrow{margin:0 0 6px}.training-top .turn{display:flex;align-items:center;min-height:56px;font-size:.875rem;line-height:1.3;padding:8px 12px}.variation-selector-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.variation-selector-heading .eyebrow{margin:0;font-size:.66rem;letter-spacing:.05em;text-align:right;color:var(--muted)}.move-panel-heading{margin:0 0 10px;font-size:1.4rem;line-height:1.3}.move-panel-heading+p{margin:0;line-height:1.5}
@media(max-width:650px){.training-top{grid-template-columns:minmax(0,1fr) minmax(120px,38%);gap:12px;min-height:88px}.training-top .turn{min-height:72px}.training-shell[data-run-kind="full"] .training-top{min-height:112px}}

/* A bright, consistent light palette for lessons, quizzes, and authoring. */
button,.button{border-radius:10px;transition:background .15s ease,box-shadow .15s ease}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #d99a31;outline-offset:3px}
button:disabled{cursor:default}
.hero{padding-bottom:24px}
.hero p:not(.eyebrow){margin-bottom:0}
.hero h1{letter-spacing:-.045em}
.hero .eyebrow{color:var(--green)}
.directory-heading{align-items:center;gap:24px}.directory-heading>div{min-width:0}.directory-heading h2{margin:0 0 14px}.recognition-entry{display:grid;gap:9px;flex:0 1 390px;margin:0;padding:16px 20px;border:1px solid #bcd5c4;border-radius:12px;background:var(--green2);color:var(--ink)}.recognition-entry:hover{text-decoration:none;border-color:var(--green)}.recognition-entry>div{display:grid;gap:5px}.recognition-entry strong{font-size:1.1rem}.recognition-entry span{font-size:.85rem;line-height:1.5}.recognition-entry-count{color:var(--green);font-weight:650}@media(max-width:700px){.directory-heading{align-items:stretch;flex-direction:column;gap:18px}.recognition-entry{flex:auto;padding:16px}}
.opening-card{display:block;color:var(--ink);padding:28px;box-shadow:none;transition:box-shadow .2s ease,border-color .2s ease}
.opening-card:hover{text-decoration:none;border-color:#a9cdb5;box-shadow:var(--shadow)}
.opening-card h3 a{color:var(--ink)}
.opening-card .color-chip{font-size:1.7rem;width:46px;height:46px;border:1px solid var(--line);background:#edf7e9;color:var(--ink)}
.opening-card:nth-child(2n) .color-chip{background:#fff0df}
.opening-card:nth-child(3n) .color-chip{background:#e8f3fb}
.opening-card .actions{margin-top:24px}

.summary-hero h1{font-size:clamp(2rem,4vw,3.3rem);line-height:1.15}
.summary-variations{list-style:none;padding:0;max-width:760px;margin:0 auto 32px}
.summary-variations .list-row{flex-wrap:wrap;padding:18px 22px}
.help-badge,.clear-badge{font-size:.8rem!important;font-weight:650;padding:5px 10px;border-radius:20px}
.list-row .clear-badge{background:var(--green2);color:var(--green)}
.list-row .help-badge{background:#fff3dc;color:#83571e}
#board .white-1e1d7{background:#f2f5e7;color:#62876f}
#board .black-3c85d{background:#8eb69b;color:#f2f5e7}
@media(max-width:850px){.hero{padding-top:10px}.hero h1 br{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

.moves>.muted{grid-column:1/-1}
/* Changing guidance and move rows must not pull the page's scroll position. */
.study-panel{overflow-anchor:none}
.board-frame{--capture-piece-size:40px;width:min(100%,650px);margin-inline:auto}
.board-frame>.board{width:100%;margin:0}
/* A move is a board gesture, not a page scroll or text/image selection. */
#board{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.piece-417db{-webkit-touch-callout:none;user-select:none;-webkit-user-select:none}
.capture-row{display:flex;align-items:center;gap:6px;height:var(--capture-piece-size);min-width:0}
#opponent-captures{margin-bottom:8px}
#player-captures{margin-top:8px;justify-content:flex-end}
.captured-pieces{display:flex;align-items:center;min-width:0}
.captured-piece{display:block;width:var(--capture-piece-size);height:var(--capture-piece-size);object-fit:contain;flex-shrink:1}
/* Overlap the transparent artwork margins without shrinking the pieces. */
.captured-piece+.captured-piece{margin-inline-start:calc(var(--capture-piece-size) / -3)}
.material-advantage{flex:none;font-size:clamp(8px,var(--capture-piece-size),14px);font-weight:750;line-height:1;font-variant-numeric:tabular-nums}

/* Lesson review, quiz selection, and answer pauses. */
.lesson-controls{margin-top:16px;padding:14px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
.lesson-controls .actions{justify-content:center}.lesson-controls p{text-align:center;margin:.8rem 0}.lesson-controls>button{display:block;margin:auto}
.lesson-controls .hidden{display:none!important}.lesson-controls button{font-size:.85rem}
.moves .move-link{padding:.25rem .4rem;text-align:left;font:inherit;font-weight:500;border-color:transparent!important}
.moves .move-link[aria-current="step"]{background:var(--green2)!important;border-color:var(--green)!important;font-weight:750}
.answer-review{padding:18px;border:1px solid var(--gold);border-radius:10px;background:#fff4d9}.answer-review h2{margin:0 0 .65rem}.answer-review p{line-height:1.5}.answer-review>button{width:100%}
.lesson-takeaway{border-top:1px solid var(--line);margin-top:18px;padding-top:4px}.lesson-takeaway h3{font-size:1rem;margin-bottom:.4rem}.lesson-takeaway p{line-height:1.6;margin-top:0}
.continuation-panel h3{font-size:1rem;margin-bottom:.4rem}.continuation-panel p{line-height:1.6;margin-top:0}
.variation-overview{border-top:1px solid var(--line);margin-top:5px;padding-top:12px}.variation-overview summary{cursor:pointer;color:var(--green);font-size:.85rem;font-weight:700}.variation-overview summary:focus-visible{outline:3px solid #d99a31;outline-offset:3px;border-radius:4px}.variation-overview p{font-size:.92rem;line-height:1.65;margin:.7rem 0 0}
.color-jumps{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 20px;font-size:.9rem}.color-jumps>span{color:var(--muted)}.color-jumps a{font-weight:650;text-decoration:underline;text-underline-offset:3px}
.playing-side{margin-top:38px;scroll-margin-top:88px}.playing-side+.playing-side{margin-top:48px;padding-top:34px;border-top:2px solid var(--line)}.playing-side-heading{display:flex;align-items:center;gap:12px}.playing-side-heading h3{font-size:1.8rem;margin:0}.playing-side-heading .color-chip{font-size:1.5rem;flex-shrink:0}
.opening-group{margin-top:28px}.opening-group-heading{font-size:1.2rem;margin:0 0 16px}.opening-replies:not(.opening-reply-grid)>.opening-reply-group+.opening-reply-group{margin-top:24px}.opening-reply-heading{font-size:.93rem;font-weight:650;color:var(--muted);margin:0 0 12px}
.opening-directory .cards{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr))}.opening-directory .opening-card{display:flex;flex-direction:column;padding:0}.opening-card-link{display:flex;flex-direction:column;flex:1;gap:16px;padding:22px;border-radius:13px;color:var(--ink)}.opening-card-link:hover{text-decoration:none}.opening-card .opening-card-title{font-size:1.2rem;line-height:1.4;font-weight:700;margin:0}.opening-card .opening-sequence{display:grid;gap:6px;margin:0;line-height:1.65}.sequence-label{font-size:.75rem;color:var(--muted)}.move-sequence{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.87rem;color:var(--ink);overflow-wrap:anywhere}.opening-card .opening-card-count{margin:auto 0 0;padding-top:2px;font-size:.82rem;line-height:1.5}
.opening-reply-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px 18px;padding-top:4px}.opening-reply-frame{--reply-columns:1;position:relative;min-width:0;display:grid;grid-column:span var(--reply-columns);margin:0;padding:20px 12px 12px;border:1px solid #bfd5c5;border-radius:14px}.reply-columns-2{--reply-columns:2}.reply-columns-3{--reply-columns:3}.opening-reply-frame>.opening-reply-heading{position:absolute;top:0;left:14px;max-width:calc(100% - 28px);margin:0;padding:0 8px;background:var(--bg);font-size:.87rem;line-height:1.4;transform:translateY(-50%)}.opening-directory .opening-reply-frame>.cards{grid-template-columns:repeat(var(--reply-columns),minmax(0,1fr));column-gap:44px;row-gap:18px;min-width:0}
@media(max-width:1100px){.opening-reply-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reply-columns-3{--reply-columns:2}}
@media(max-width:700px){.opening-reply-grid{grid-template-columns:minmax(0,1fr)}.opening-reply-frame{--reply-columns:1}}
.opening-directory .opening-card{position:relative}.opening-card-resume{position:absolute;top:16px;right:16px}.opening-card-resume .resume{display:inline-flex;align-items:center;min-height:34px;padding:6px 10px;font-size:.8rem;line-height:1.4}.opening-card:has(.opening-card-resume:not(.hidden)) .opening-card-title{padding-inline-end:78px;min-height:28px}
.engine-evaluation .engine-heading{margin:0 0 16px;font-weight:650}
.engine-evaluation .evaluation-note{line-height:1.6}
.study-plan-picker{margin-bottom:28px}.study-plan-picker h2{margin:0 0 8px;font-size:1.35rem}.study-plan-picker>p{margin:0 0 16px;line-height:1.6}.study-plan-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:14px}.study-plan-option{display:grid;align-content:start;gap:10px;padding:20px;border:2px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);line-height:1.6}.study-plan-option:hover{text-decoration:none;border-color:var(--green)}.study-plan-option:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.study-plan-option.is-selected{border-color:var(--green);background:var(--green2)}.study-plan-option strong{font-size:1.08rem;line-height:1.4}.study-plan-option small{color:var(--muted)}.study-plan-status{font-size:.76rem;font-weight:750;color:var(--green)}.lesson-plan-context{display:grid;gap:5px;font-size:.8rem;line-height:1.5;margin:0 0 5px}.plan-comparison-choice{padding-top:14px;font-size:.85rem;line-height:1.6}.plan-comparison-choice+.plan-comparison-choice{border-top:1px solid var(--line);margin-top:14px}.plan-comparison-choice p{font-size:inherit;margin:.4rem 0}.plan-comparison-choice a{font-weight:700}.learning-ideas{border-top:1px solid var(--line);margin-top:16px;padding-top:13px}.learning-ideas-toggle{display:flex;align-items:center;gap:10px;font-weight:700;font-size:.85rem;cursor:pointer;line-height:1.5}.learning-ideas-toggle input{width:18px;height:18px;margin:0;flex-shrink:0;accent-color:var(--green)}#learning-target-captions{padding-left:24px;margin:12px 0 0;font-size:.85rem;line-height:1.6}#learning-target-captions li+li{margin-top:7px}.learning-target-marker{position:absolute;inset:9%;border:3px solid #b13c2e;border-radius:50%;pointer-events:none;z-index:6;box-shadow:0 0 0 1px #fff9}.learning-target-number{position:absolute;right:-5px;top:-5px;min-width:18px;height:18px;display:grid;place-items:center;padding:0 3px;background:#fff;color:#922f24;border:1px solid #b13c2e;border-radius:50%;font:750 12px/1 system-ui,sans-serif}
.opening-title{display:block;padding:0;margin-bottom:26px}.opening-title-row{display:flex;flex-wrap:wrap;align-items:baseline;column-gap:18px;row-gap:7px}.opening-title h1{margin:0}.opening-title .opening-count{margin:0;font-size:.92rem;font-weight:500;line-height:1.5;color:var(--muted)}
.opening-workspace{min-width:0}.opening-workspace.has-plan-picker{display:grid;grid-template-columns:minmax(240px,320px) minmax(0,1fr);gap:28px;align-items:start}.opening-sidebar,.opening-practice{min-width:0}.opening-sidebar .study-plan-picker{margin-bottom:0}.opening-sidebar .study-plan-picker+.study-plan-picker{margin-top:24px}.opening-sidebar .study-plan-options{grid-template-columns:minmax(0,1fr);gap:10px}.opening-sidebar .study-plan-option{padding:16px;gap:6px;font-size:.9rem;overflow-wrap:anywhere}.opening-sidebar .study-plan-option strong{font-size:1rem}
@media(max-width:700px){.opening-workspace.has-plan-picker{grid-template-columns:minmax(0,1fr);gap:24px}}

/* Variation lookup stays inside its popup. */
.variation-selector-tools{display:flex;align-items:baseline;gap:8px;min-width:0}
.form-stack .variation-selector-heading{margin-bottom:7px}
.variation-search-dialog{width:min(620px,calc(100vw - 24px));max-height:85vh;padding:20px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--ink);box-shadow:0 14px 60px #17372b33;overscroll-behavior:contain}
.variation-search-dialog::backdrop{background:#142b2266}
.variation-search-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}
.variation-search-heading h2{font-size:1.3rem;margin:0}.variation-search-dialog>label{display:block;font-size:.85rem;font-weight:700;margin-bottom:7px}
.variation-search-dialog>p{font-size:.85rem;margin:10px 0}.variation-search-results{max-height:55vh;overflow:auto;overscroll-behavior:contain}
.variation-search-results h3{font-size:.9rem;margin:18px 0 7px;color:var(--muted)}.variation-search-results ul{list-style:none;padding:0;margin:0;display:grid;gap:5px}
.variation-search-results button{display:block;width:100%;min-height:44px;text-align:left;font-size:.9rem;font-weight:500;line-height:1.5;background:var(--bg);color:var(--ink);border:1px solid var(--line);padding:10px 12px}
.variation-search-results button[aria-current="true"]{border-color:var(--green);background:var(--green2);font-weight:700}
.variation-search-dialog input:focus-visible,.variation-search-dialog button:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.feedback-row{display:flex;align-items:start;gap:8px}.feedback-row .feedback{flex:1;min-width:0}.feedback-row>button{flex:none;padding:.65rem .75rem}
.training-shell[data-run-kind="tutorial"] .feedback-row{display:contents}
#summary-scope:empty{display:none}
.opening-title .opening-introduction{max-width:82ch;margin:12px 0 0;font-size:.95rem;font-weight:400;line-height:1.65;color:var(--muted)}
.practice-options{display:grid;gap:10px;max-width:100%;min-width:0}.practice-options label{font-size:.9rem;font-weight:700}.practice-actions{margin-top:4px}.practice-actions button{min-width:100px}.practice-options>p{font-size:.85rem;line-height:1.5;margin:0}
#practice-variations{height:44px}.practice-actions button{min-height:44px}
.session-recovery{margin-bottom:18px}.session-recovery p{line-height:1.5}.session-invalid .training-grid{opacity:.6}.session-invalid #feedback,.session-invalid .dialog-error{display:none!important}