:root{color-scheme:dark;--bg:#111310;--panel:#1a1d17;--line:#353b2e;--muted:#a0a696;--lime:#d5ff5f;--ink:#f2f3e9}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 Arial,Helvetica,sans-serif}button,input,select{font:inherit}button,a,input,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--lime);outline-offset:4px}header{max-width:1400px;margin:auto;padding:25px 44px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.brand{display:flex;align-items:center;gap:10px;font-size:21px;letter-spacing:.06em;font-weight:800;color:var(--ink);text-decoration:none}.brand-mark{color:var(--lime);font-size:42px;line-height:1}.brand-light{font-weight:400;color:var(--lime)}.brand small{display:block;font-size:8px;letter-spacing:.18em;color:var(--muted);margin-top:2px}nav{display:flex;gap:30px}nav button{background:none;border:0;color:var(--muted);padding:10px 0}nav button.active{color:var(--lime);box-shadow:0 2px var(--lime)}.goal-label{font-size:9px;letter-spacing:.15em;color:var(--muted)}.goal-label b{font-size:18px;display:block;color:var(--ink);letter-spacing:0}main{max-width:1312px;margin:0 auto;padding:44px}h1{font-size:clamp(34px,4vw,55px);line-height:1.08;letter-spacing:-.045em;margin:12px 0 16px}h2{font-size:24px;letter-spacing:-.025em;margin:0 0 12px}h3{font-size:18px;margin:10px 0}p{color:var(--muted)}.eyebrow{color:var(--lime);font-size:10px;letter-spacing:.16em;font-weight:bold;text-transform:uppercase}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:50px;align-items:center;margin-bottom:36px}.hero p{max-width:540px}.hero-note{border-left:2px solid var(--lime);padding:8px 0 8px 22px}.hero-note b{font-size:19px;display:block}.hero-note p{font-size:13px;margin:7px 0 0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 0}.primary,.secondary{min-height:44px;padding:12px 18px;border-radius:5px;font-weight:700;border:1px solid var(--line)}.primary{background:var(--lime);color:#151b0d;border-color:var(--lime)}.primary:hover{background:#e1ff94}.secondary{background:transparent;color:var(--ink)}.secondary:hover{background:#2c3225}.metrics{display:grid;grid-template-columns:repeat(4,1fr);margin-bottom:38px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.metric{padding:22px 24px;border-right:1px solid var(--line)}.metric:last-child{border:0}.metric small{display:block;color:var(--muted);font-size:11px}.metric strong{display:block;font-size:30px;font-weight:500;margin:6px 0}.metric span{font-size:11px;color:var(--muted)}.metric .accent{color:var(--lime)}.section-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:20px}.section-head h2{margin-bottom:3px}.section-head p{margin:0;font-size:13px}.target{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:10px}.target input{width:85px;background:#20251b;color:var(--lime);border:1px solid var(--line);border-radius:5px;padding:9px}.motif-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.motif-card{border:1px solid var(--line);border-radius:8px;background:var(--panel);padding:21px;display:flex;flex-direction:column;min-height:254px}.motif-card:hover{border-color:#68734f}.card-top{display:flex;justify-content:space-between;align-items:center}.motif-icon{font-size:29px;color:var(--lime);line-height:1}.badge{font-size:9px;padding:4px 7px;border:1px solid #414936;border-radius:4px;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}.badge.mastered{color:var(--lime);border-color:#6c803b}.motif-card p{font-size:12px;margin:0 0 16px;min-height:36px}.rating-row{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin-top:auto}.rating-row b{font-size:28px;font-weight:500}.rating-row small{font-size:10px;color:var(--muted)}.progress{background:#343b2b;border-radius:3px;height:4px;overflow:hidden;margin:10px 0}.progress>div{background:var(--lime);height:100%}.card-bottom{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted)}.text-button{border:0;background:none;color:var(--lime);padding:7px 0;font-weight:600}.method{margin-top:28px;display:grid;grid-template-columns:1fr 1fr;gap:28px;border-top:1px solid var(--line);padding-top:26px}.method h3{font-size:14px}.method p{font-size:12px;margin:6px 0}.method a,footer a{color:var(--muted)}footer{max-width:1224px;margin:20px auto 0;padding:23px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:18px;font-size:10px;color:var(--muted)}.panel{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:24px}.hidden{display:none!important}.stats{display:flex;justify-content:space-between}.stats b{display:block}.status{min-height:55px}.error{color:#ffb4ab}.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;width:100%;isolation:isolate;box-shadow:0 0 0 5px #333;overflow:hidden}.sq{position:relative;aspect-ratio:1;border:0;border-radius:0;padding:0;display:grid;place-items:center;background:#e4e4dc;overflow:hidden;touch-action:manipulation}.sq.dark{background:#868681}.sq.sel,.sq.last{background:#d5ff5f}.sq.dark.sel,.sq.dark.last{background:#a4bd53}.sq.target:after{content:'';position:absolute;width:28%;height:28%;border-radius:50%;background:#0002;z-index:2;pointer-events:none}.sq.target.occupied:after{width:90%;height:90%;border:6px solid #0002;background:transparent}.sq:not(:disabled):hover{box-shadow:inset 0 0 0 3px #fff4}.sq:focus-visible{outline-offset:-4px}.piece{width:90%;height:90%;object-fit:contain;pointer-events:none;user-select:none;filter:drop-shadow(0 2px 1px #0003);z-index:1}.coord{position:absolute;font:600 11px Arial;left:4px;bottom:3px;color:#4b4b47;z-index:2}.dark .coord{color:#fafaf1}.rank-label{top:3px;bottom:auto}.file-label{left:auto;right:4px}.turn-indicator{font-weight:bold;font-size:11px;letter-spacing:.08em;padding:5px 10px;background:#f7f4e8;color:#111}.turn-indicator.black{background:#111;color:var(--lime);border:1px solid var(--lime)}.game .board.turn-white{box-shadow:0 0 0 4px #f7f4e8}.game .board.turn-black{box-shadow:0 0 0 4px var(--lime)}.game .layout{grid-template-columns:minmax(0,1fr) 340px}.puzzle-session-title{color:var(--muted)}.session-extra{border-top:1px solid #393939;margin-top:18px;padding-top:14px;color:var(--muted);font-size:12px}.session-extra p{font-size:12px}.notation{font-family:monospace;color:var(--ink);line-height:1.8;overflow-wrap:anywhere}.solved-badge{position:absolute;right:0;top:0;z-index:4;background:var(--lime);color:#111;font-weight:bold;padding:3px 7px;font-size:12px;pointer-events:none}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;padding:15px;border-bottom:1px solid var(--line);font-size:13px}th{font-size:10px;text-transform:uppercase;color:var(--muted)}.empty{padding:45px;text-align:center}.banner{border:1px solid #566639;padding:16px;border-radius:6px;background:#242c19;margin:20px 0}.game .session-extra .secondary{padding:8px 12px;font-size:12px;min-height:40px}.game .puzzle-session-tools button{min-height:44px;color:var(--lime);background:transparent;border:1px solid #444;border-radius:5px;padding:8px 12px}.game .stats small{display:block}.game .status{height:auto}.promotion{display:flex;gap:8px;margin:12px 0}.promotion button{background:var(--lime);color:#111;border:0;padding:12px;min-width:45px;border-radius:4px}.save-warning{color:#ffb4ab}
.sq:disabled{opacity:1;cursor:default}
.assessment-summary{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:30px}.assessment-summary>div{flex:1}.assessment-summary h2{margin-top:8px}.assessment-summary p{font-size:13px}.training-plan{margin-bottom:28px}.training-plan p{font-size:13px;max-width:900px}.weakest-list{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin:22px 0}.weakest-list>div{padding:14px;border:1px solid var(--line);border-radius:5px}.weakest-list span{font-size:12px;color:var(--muted)}.weakest-list b{display:block;font-size:26px;font-weight:500;color:var(--lime);margin-top:8px}.score-note{color:var(--muted);font-size:12px!important}#score-table td{white-space:nowrap}
@media(max-width:760px){.assessment-summary{flex-direction:column;align-items:stretch;gap:14px}.weakest-list{grid-template-columns:repeat(2,minmax(0,1fr))}.assessment-summary .eyebrow{font-size:9px}.assessment-summary h2{font-size:23px}}
.library-removal{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px}.library-removal p{font-size:12px;margin-bottom:0}.library-removal button{margin-right:8px}
.import-panel{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:28px;margin-bottom:24px}.import-panel p{font-size:13px}.import-note{border-left:1px solid var(--line);padding-left:26px}.import-report{grid-column:1/-1;border-top:1px solid var(--line);padding-top:18px;font-size:13px;overflow-wrap:anywhere}.import-report:empty{display:none}.import-report progress{display:block;width:100%;height:9px;accent-color:var(--lime);margin-top:14px}.import-report p{margin-bottom:0}.file-label-input{display:block;font-size:12px;color:var(--muted);margin:20px 0 8px}#puzzle-csv{display:block;width:100%;max-width:100%;font-size:12px;color:var(--muted)}#puzzle-csv::file-selector-button{padding:11px 15px;border:1px solid var(--line);border-radius:4px;background:#2b3223;color:var(--ink);margin-right:12px;cursor:pointer}.library-filters{display:flex;gap:10px;flex-wrap:wrap}.library-filters input,.library-filters select{background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:10px 12px;color:var(--ink);max-width:100%;min-height:44px}.theme-id{display:block;color:var(--muted);font-size:10px;margin-top:3px}#theme-table td{white-space:nowrap}.hero{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}.hero>*{min-width:0}.import-panel input{min-width:0}.library-metrics strong{font-size:26px}
@media(max-width:760px){header nav{gap:16px;justify-content:space-between;width:100%;margin-left:0}.import-panel{grid-template-columns:1fr;gap:20px;padding:18px}.import-note{border-left:0;border-top:1px solid var(--line);padding:16px 0 0}.library-filters{width:100%}.library-filters input{width:100%}.library-filters select{width:100%}.library-metrics .metric{min-width:0}.library-metrics strong{font-size:24px}}
@media(min-width:761px){.game .layout{grid-template-columns:minmax(0,1fr) 340px!important}.game #board{max-width:700px}}
@media(max-width:1050px){header{padding:20px 25px}main{padding:30px 25px}.motif-grid{grid-template-columns:repeat(2,1fr)}footer{margin-inline:25px}.hero{gap:24px}.goal-label{display:none}}
@media(max-width:760px){header{padding:15px 18px;gap:14px;flex-wrap:wrap}.brand{font-size:18px}.brand-mark{font-size:34px}nav{gap:22px;margin-left:auto}nav button{font-size:12px}main{padding:26px 18px}.hero{display:block;margin-bottom:25px}.hero-note{margin-top:25px}.metrics{grid-template-columns:repeat(2,1fr);margin-bottom:28px}.metric{padding:16px}.metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid var(--line)}.metric strong{font-size:25px}.motif-grid{gap:10px}.motif-card{padding:16px;min-height:255px}.motif-card h3{font-size:16px}.badge{font-size:8px}.section-head{align-items:flex-start;flex-direction:column}.method{grid-template-columns:1fr;gap:10px}footer{display:block;margin:20px 18px}footer>span{display:block;margin-bottom:8px}.game .session-extra{grid-column:1/-1}.game .stats .practice-untimed{font-size:17px}.game .status{min-height:44px;height:auto}.game .layout>.puzzle-control-panel{gap:8px}.game .session-extra p{margin:5px 0}.game .puzzle-session-title{font-size:11px}.game .puzzle-session-tools button{padding:7px;font-size:11px}.game .puzzle-control-panel .stats{flex-wrap:wrap;gap:8px}.game .puzzle-control-panel{margin-bottom:6px}.game .session-extra{margin-top:4px;padding-top:8px}.game .session-extra details{margin-top:6px}}
@media(max-width:370px){.motif-grid{grid-template-columns:1fr}.hero h1{font-size:34px}.brand small{display:none}nav{gap:15px}.game .puzzle-session-title{display:none}}
:root .account-dialog{width:min(540px,calc(100% - 28px));max-height:90vh;overflow:auto;background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:26px;box-shadow:0 25px 100px #0008}.account-dialog::backdrop{background:#000a;backdrop-filter:blur(4px)}.account-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}.account-heading h2{margin-top:8px}.account-heading>button{background:none;color:var(--ink);border:0;font-size:28px;cursor:pointer}.account-dialog form{display:grid;gap:10px;margin:22px 0}.account-dialog label{font-size:13px}.account-dialog input{width:100%;padding:12px;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:5px}.account-dialog form .primary{margin-top:10px}.account-links{display:flex;flex-wrap:wrap;gap:20px}.account-links button{background:none;color:var(--lime);border:0;padding:6px 0;cursor:pointer}.account-guest{border-top:1px solid var(--line);margin-top:24px;padding-top:16px}.account-dialog p{font-size:13px;overflow-wrap:anywhere}#account-message{color:var(--lime);min-height:20px}#account-nav{white-space:nowrap}@media(max-width:760px){header nav{width:100%;justify-content:space-between;gap:10px}.account-dialog{padding:20px}}
.google-signin{display:block;width:100%;margin-top:24px}

[hidden]{display:none!important}.signin-gate{max-width:720px;margin:70px auto;padding:48px}.signin-gate h1{font-size:clamp(36px,6vw,60px)}.signin-gate p{max-width:560px}.signin-gate .primary{margin-top:16px}@media(max-width:760px){.signin-gate{margin:30px auto;padding:28px}}

.rating-onboarding{max-width:800px;margin:40px auto;padding:40px}.rating-onboarding h1{font-size:clamp(30px,4vw,44px)}.rating-onboarding fieldset{border:0;padding:0;margin:28px 0}.rating-onboarding legend{font-weight:600;margin-bottom:12px}.rating-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.rating-option{display:flex;align-items:center;gap:14px;padding:20px;border:1px solid var(--line);border-radius:10px;cursor:pointer}.rating-option:has(input:checked){border-color:var(--lime);background:#d5ff4010}.rating-option input{accent-color:var(--lime);width:18px;height:18px}.rating-option strong,.rating-option small{display:block}.rating-option small{color:var(--muted);margin-top:5px}@media(max-width:600px){.rating-onboarding{padding:24px}.rating-options{grid-template-columns:1fr}}

header nav .admin-link{color:var(--lime);text-decoration:none;font-size:14px;padding:10px;white-space:nowrap}

.account-reset-section{border-top:1px solid var(--line);margin-top:24px;padding-top:12px;margin-bottom:24px}.account-dialog{max-height:90dvh;overflow-y:auto}