:root{font-family:Segoe UI,Arial,sans-serif;color:#d9d9d7;background:#262522;--bg:#262522;--panel:#302e2b;--panel2:#383632;--text:#d9d9d7;--muted:#a6a39c;--line:#46433e;--accent:#8ebd62;--light:#eeeed2;--dark:#769656;--board-size:100%;color-scheme:dark}*{box-sizing:border-box}body{margin:0}body.light{--bg:#eeece8;--panel:#fff;--panel2:#f4f2ee;--text:#37352f;--muted:#777267;--line:#ddd9d1;color-scheme:light;background:var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}button{cursor:pointer;background:var(--panel2);border:1px solid transparent;border-radius:5px;color:var(--text);padding:10px 12px}button:hover{filter:brightness(1.15)}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}header{height:72px;display:flex;align-items:center;gap:35px;padding:0 30px;border-bottom:1px solid var(--line);background:var(--panel)}.brand{display:flex;align-items:center;text-decoration:none;color:var(--text);font-size:25px;font-weight:600;letter-spacing:-1px}.brand img{width:38px;margin-right:9px}.brand span{font-weight:300}nav{display:flex;height:100%;align-items:stretch;gap:5px}nav button{background:none;border-radius:0;font-size:15px;padding:0 17px}nav button.active{box-shadow:inset 0 -3px var(--accent);color:var(--accent)}.iconButton{font-size:24px;margin-left:auto;background:none}.workspace{display:grid;grid-template-columns:minmax(195px,230px) minmax(340px,640px) minmax(260px,330px);gap:24px;justify-content:center;align-items:start;max-width:1530px;padding:24px;margin:auto}.panel{background:var(--panel);border-radius:7px;overflow:hidden;box-shadow:0 2px 5px #0002}.library{padding:20px;min-width:0}.panelHeading{margin-bottom:20px}.eyebrow{font-size:10px;letter-spacing:1.5px;color:var(--accent);font-weight:700}h1{font-size:23px;margin:8px 0 0;font-weight:600}h2{font-size:21px;line-height:1.35;margin:8px 0 10px;font-weight:600}p{line-height:1.5}label{display:block;font-size:12px;color:var(--muted);margin-bottom:15px}input,select,textarea{display:block;width:100%;background:var(--bg);border:1px solid var(--line);border-radius:4px;color:var(--text);padding:10px;margin-top:7px;font-size:13px}input[type=range]{accent-color:var(--accent);padding:0;height:25px}output{float:right}.twoColumns{display:grid;grid-template-columns:1fr 1fr;gap:10px}.wide{width:100%}.primary{background:#739b48;color:white;box-shadow:0 3px 0 #52762d;font-weight:600;padding:13px 14px}.muted{color:var(--muted);font-size:12px}.libraryFoot{border-top:1px solid var(--line);padding-top:16px;margin-top:24px;font-size:10px;color:var(--muted);line-height:1.8}.localDot{color:var(--accent)}#stats{margin-bottom:8px}#catalog{max-height:510px;overflow:auto;margin:0 -10px}.entry{display:block;width:100%;background:transparent;border-radius:3px;text-align:left;padding:10px;margin:3px 0;font-size:12px;line-height:1.5}.entry small{display:block;font-size:10px;color:var(--accent);margin-bottom:3px}.entry.selected{background:var(--panel2);box-shadow:inset 3px 0 var(--accent)}.play{width:var(--board-size);justify-self:center;max-width:calc(100vh - 245px);min-width:min(100%,340px)}.player{display:flex;align-items:center;gap:10px;height:58px}.avatar{width:38px;height:38px;background:var(--panel2);display:grid;place-items:center;color:var(--muted);font-size:13px;font-weight:700;border-radius:4px}.playerInfo{flex:1;min-width:0}.playerInfo strong{font-size:14px;font-weight:600}.clock{font-size:30px;line-height:1;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:1px;background:var(--panel2);padding:9px 12px;color:var(--muted);border-radius:3px;min-width:112px;text-align:center;position:relative;overflow:hidden}.clock.active{color:var(--text);background:#536342}.clock.low{background:#813d35;color:#fff}.clock::after{content:'';position:absolute;height:3px;bottom:0;left:0;width:var(--clock-percent,0);background:var(--accent)}.captured{height:18px;display:flex;align-items:center;font-size:11px;gap:0;color:var(--muted)}.captured img{width:19px;height:19px;margin-right:-5px}.captured span{margin-left:8px}.boardArea{position:relative;margin:8px 0}.cg-wrap{width:100%;aspect-ratio:1;position:relative;border-radius:3px;box-shadow:0 2px 8px #0004;isolation:isolate}cg-board{background-color:var(--light);background-image:conic-gradient(var(--dark) 25%,var(--light) 0 50%,var(--dark) 0 75%,var(--light) 0);background-size:25% 25%;border-radius:3px;touch-action:none}.cg-wrap piece{background-size:100% 100%}cg-board square.last-move{background:#cdd26a77}cg-board square.selected{background:#f5d55299}cg-board square.move-dest{background:radial-gradient(#15392344 19%,transparent 22%)}cg-board square.oc.move-dest{background:radial-gradient(transparent 62%,#15392355 65%)}cg-board square.current-premove{background:#426bc399}cg-board square.premove-dest{background:radial-gradient(#426bc388 19%,transparent 22%)}cg-board square.check{background:radial-gradient(ellipse at center,#ff0000 0,#e70000 25%,#a9000000 80%)}.cg-wrap coords{font-size:11px;font-weight:600;color:var(--text);opacity:1}.cg-wrap coords.ranks{top:0;left:3px;width:12px;justify-content:space-around}.cg-wrap coords.ranks coord{transform:none;display:flex;align-items:flex-start;padding-top:3px}.cg-wrap coords.files{left:0;bottom:0;height:15px;text-transform:lowercase}.cg-wrap coords.files coord{text-align:right;padding-right:4px}.coords-inside coords{color:#31512b}.coords-outside coords.ranks{left:-17px}.coords-outside coords.files{bottom:-17px}.coords-outside{margin-bottom:24px}.boardTools{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:5px}.boardTools button{background:none;padding:5px 9px;font-size:20px}.boardHelp{color:var(--muted);font-size:10px;margin:12px 0}#message{background:var(--panel);border-left:3px solid var(--accent);border-radius:3px;padding:12px;font-size:13px;line-height:1.4;margin-top:10px;min-height:42px}#message.error{border-color:#d47367}#pendingMove{padding:12px;display:flex;gap:8px;align-items:center;font-size:12px;background:var(--panel)}#keyboardForm{display:flex;gap:8px;margin-top:12px}#keyboardForm input{margin:0}.coach{padding:20px}.coach .panelHeading p{font-size:12px;color:var(--muted);margin-bottom:0}.notationHead{display:flex;align-items:center;justify-content:space-between;padding:8px 0;font-size:13px}.notationHead button{background:none;font-size:12px;color:var(--muted);padding:5px}.moves{height:240px;overflow:auto;margin:0 -20px;background:var(--bg);font-size:14px}.moveRow{display:grid;grid-template-columns:35px 1fr 1fr;align-items:center;min-height:33px}.moveRow:nth-child(even){background:#8888880b}.moveRow>span{color:var(--muted);font-size:12px;text-align:center}.moveRow button{border-radius:0;background:transparent;text-align:left;padding:8px 12px;font-weight:500}.moveRow button.current{background:#75984f55;color:var(--accent)}.empty{padding:25px;font-size:12px;color:var(--muted);text-align:center}.transport{display:flex;margin:0 -20px 15px;border-bottom:1px solid var(--line)}.transport button{flex:1;border-radius:0;background:none;padding:13px;font-size:17px}#gameActions{display:flex;justify-content:space-between;gap:4px}#gameActions button{font-size:11px;padding:9px 6px}#trainingActions{margin-bottom:15px;display:flex;flex-wrap:wrap;gap:8px}#trainingActions p{width:100%;margin:0}.engine{border-top:1px solid var(--line);margin-top:20px;padding-top:10px}.engine .wide{margin:6px 0 10px}.badge{font-size:9px;color:var(--accent);border:1px solid var(--line);padding:3px 5px;border-radius:3px}#analysis p{background:var(--bg);padding:9px;border-radius:3px;line-height:1.7;font-size:12px}.quiet{background:none;color:var(--muted);font-size:11px;padding-left:0}#source{display:block;font-size:12px;color:var(--accent);margin-top:15px}#evalBar{position:absolute;top:0;bottom:0;width:16px;left:-21px;background:#222;border:1px solid #555;border-radius:2px;overflow:hidden}#evalFill{position:absolute;bottom:0;width:100%;height:50%;background:#eee;transition:height .4s}#evalText{position:absolute;bottom:5px;left:0;font-size:8px;color:#222}dialog{border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--text);padding:24px;max-width:min(960px,95vw);max-height:90vh;box-shadow:0 20px 90px #0008}dialog::backdrop{background:#0009}.dialogHead{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.dialogHead h2{margin:0}.dialogHead button{background:none}.settingsGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:14px;font-weight:600;margin-bottom:20px;color:var(--accent)}.check{display:flex;align-items:center;gap:10px;margin:15px 0;line-height:1.4}.check input{width:17px;height:17px;accent-color:var(--accent);margin:0}.dialogButtons{display:flex;gap:10px;justify-content:flex-end}#promotionChoices{display:flex;gap:10px;margin:20px 0}#promotionChoices button{width:80px;height:80px;background:var(--light)}#promotionChoices img{width:100%;height:100%}#fenText{width:min(600px,80vw)}.focus .library,.focus header,.focus .boardHelp{display:none}.focus .workspace{grid-template-columns:minmax(340px,760px) 300px}.focus .play{max-width:calc(100vh - 180px)}[hidden]{display:none!important}@media(min-width:1500px){.workspace{padding-top:30px}}@media(max-width:1100px){header{gap:12px;padding:0 18px}nav button{padding:0 10px}.workspace{grid-template-columns:minmax(170px,200px) minmax(330px,1fr);gap:20px}.coach{grid-column:1/-1;display:block}.play{max-width:650px}.moves{height:170px}.settingsGrid{gap:20px}}@media(max-width:700px){header{height:auto;min-height:55px;flex-wrap:wrap;gap:0;padding:8px 12px}.brand{font-size:22px}.brand img{width:30px}nav{order:3;width:100%;overflow:auto;height:44px;margin-top:6px}nav button{flex:1;font-size:13px;white-space:nowrap;padding:10px}.workspace{display:flex;flex-direction:column;padding:12px;gap:16px}.play{order:0;max-width:none;width:100%;min-width:0}.library{order:1;width:100%}.coach{order:2;width:100%}.player{height:48px}.clock{font-size:25px;padding:8px 10px;min-width:100px}.avatar{width:33px;height:33px}.playerInfo strong{font-size:13px}.boardHelp{font-size:9px}.settingsGrid{grid-template-columns:1fr}.settingsGrid fieldset{border-top:1px solid var(--line);padding-top:10px}.settingsGrid legend{margin:0 0 10px}.focus .workspace{display:flex}.focus .play{max-width:none}.coords-outside{width:calc(100% - 18px);margin-left:18px}#evalBar{display:none!important}#catalog{max-height:230px}.libraryFoot{margin-top:15px}.coach .moves{height:200px}#promotionChoices button{width:60px;height:60px}}
.customPosition{font-size:12px;color:var(--muted);margin:16px 0}.customPosition summary{cursor:pointer;margin-bottom:12px}

.treeBranch{border-left:1px solid var(--line);margin:6px 0 6px 8px;padding-left:8px}.treeBranch summary{cursor:pointer;white-space:nowrap}.treeBranch summary button{padding:6px;font-variant-numeric:tabular-nums}.treeBranch .entry{white-space:normal}.analysisSwitch{display:flex;align-items:center;gap:8px;margin:14px 0}.analysisSwitch input{width:auto}#catalog{overflow:auto}

.studyModes{display:grid;gap:6px;margin:0 0 16px}.studyModes .active{background:var(--accent);color:#17220f}.treeBreadcrumb{display:flex;flex-wrap:wrap;gap:4px;margin:8px 0}.treeBreadcrumb button{padding:5px 7px;font-size:12px}.continuation{display:flex;align-items:center;justify-content:space-between;gap:8px}.continuation small{margin:0}#catalog h3{font-size:13px;color:var(--muted);margin:18px 0 8px}#studyGuide button{margin-bottom:6px}#trainingLibraryNote{line-height:1.6}

.continuation{display:block;text-align:left;width:100%;padding:12px 10px}.continuationRow{display:flex;align-items:center;justify-content:space-between;gap:8px}.continuationRow strong{font-size:16px}.openingName{display:block;font-size:13px;line-height:1.45;margin-top:6px;color:var(--text);white-space:normal}.currentOpening{display:grid;gap:7px;padding:12px 0;margin-bottom:10px;border-bottom:1px solid var(--line);line-height:1.45}.currentOpening small{color:var(--muted);font-size:10px;letter-spacing:.1em}.currentOpening span{font-size:12px;color:var(--muted)}

.boardTransport{display:grid;grid-template-columns:1fr 1fr 1.5fr 1fr 1fr;gap:6px;margin:10px 0;width:100%}.boardTransport button{min-height:44px;font-size:19px;padding:8px}.boardTransport #playLesson{background:var(--accent);color:#17220f;font-size:16px;font-weight:600}#chooseOpening{margin-bottom:16px}#openingPicker{width:min(760px,94vw);max-height:90dvh}.pickerFilters{display:grid;grid-template-columns:2fr 1fr;gap:14px}#pickerList{max-height:52dvh;overflow:auto}#pickerList .entry{display:grid;gap:7px;text-align:left;width:100%;padding:12px}#pickerList strong{font-size:14px}#pickerList small{margin:0}.pickerPages{display:flex;justify-content:space-between;gap:8px;margin-top:12px}@media(max-width:700px){.pickerFilters{grid-template-columns:1fr}.boardTransport{gap:4px}.boardTransport button{font-size:18px}}