#tto-one-hand-ui{--oh-bg:#f5f7fb;--oh-panel:#fff;--oh-text:#17243b;--oh-muted:#596b82;--oh-line:#dde5ef;--oh-soft:#eef3f9;--oh-blue:#2563eb;--oh-blue-soft:#eef4ff;--oh-green:#147544;--oh-green-soft:#effaf3;--oh-button:#16834d;--oh-button-text:#fff;--oh-red:#b42336;color:var(--oh-text);background:var(--oh-bg);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:15px;line-height:1.55;border-radius:14px;overflow:hidden;color-scheme:light dark}
#tto-one-hand-ui *{box-sizing:border-box}#tto-one-hand-ui [hidden]{display:none!important}#tto-one-hand-ui button,#tto-one-hand-ui input{font:inherit}#tto-one-hand-ui button,#tto-one-hand-ui a{touch-action:manipulation}#tto-one-hand-ui button{color:inherit}#tto-one-hand-ui a{color:var(--oh-blue);text-decoration:none}#tto-one-hand-ui a:hover{text-decoration:underline}#tto-one-hand-ui svg{width:19px;height:19px;flex-shrink:0}#tto-one-hand-ui .oh-header{padding:17px 26px;background:var(--oh-panel);border-bottom:1px solid var(--oh-line);display:flex;align-items:center;gap:28px;flex-wrap:wrap}#tto-one-hand-ui .oh-brand{display:flex;align-items:center;gap:9px;font-size:18px;font-weight:500;letter-spacing:-.6px;white-space:nowrap;color:var(--oh-text)}#tto-one-hand-ui .oh-brand>span:first-child{display:flex;align-items:center;justify-content:center;background:var(--oh-blue-soft);color:var(--oh-blue);width:35px;height:35px;border-radius:9px}#tto-one-hand-ui .oh-brand em{font-style:normal;color:var(--oh-blue)}#tto-one-hand-ui .oh-nav{display:flex;align-items:center;gap:19px;margin-left:auto;font-size:13px}#tto-one-hand-ui .oh-nav a{color:var(--oh-muted)}#tto-one-hand-ui .oh-account{display:inline-flex;gap:7px;align-items:center;border:1px solid var(--oh-line);border-radius:8px;padding:7px 10px;font-size:13px;color:var(--oh-text)}#tto-one-hand-ui .oh-main{padding:24px 28px 32px;max-width:1500px;margin:auto}#tto-one-hand-ui .oh-crumbs{font-size:12px;color:var(--oh-muted);display:flex;gap:9px;align-items:center;margin-bottom:16px}#tto-one-hand-ui .oh-heading{display:flex;gap:22px;align-items:center;justify-content:space-between;margin-bottom:20px}#tto-one-hand-ui h1{font-size:32px;line-height:1.2;letter-spacing:-1.15px;font-weight:500;margin:0 0 8px}#tto-one-hand-ui p{margin:0}#tto-one-hand-ui .oh-heading p{color:var(--oh-muted);font-size:14px}#tto-one-hand-ui .oh-free{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--oh-green);white-space:nowrap;background:var(--oh-green-soft);padding:6px 10px;border-radius:20px}#tto-one-hand-ui .oh-panel{background:var(--oh-panel);border:1px solid var(--oh-line);border-radius:14px}#tto-one-hand-ui .oh-hand-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px 18px;margin-bottom:18px}#tto-one-hand-ui .oh-label{font-size:14px;font-weight:500;margin-bottom:2px}#tto-one-hand-ui .oh-secondary{font-size:12px;color:var(--oh-muted)}#tto-one-hand-ui .oh-hand-picks{display:flex;gap:8px;flex-wrap:wrap}#tto-one-hand-ui .oh-hand-pick{display:flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:9px 21px;border:1px solid var(--oh-line);border-radius:10px;background:var(--oh-panel);font-weight:500}#tto-one-hand-ui .oh-hand-pick[aria-pressed="true"]{background:var(--oh-blue-soft);color:var(--oh-blue);border-color:var(--oh-blue)}#tto-one-hand-ui .oh-hand-pick .oh-check{display:none;width:16px}#tto-one-hand-ui .oh-hand-pick[aria-pressed="true"] .oh-check{display:inline}#tto-one-hand-ui .oh-hand-left{transform:scaleX(-1)}#tto-one-hand-ui .oh-practice{padding:22px;margin-bottom:22px}#tto-one-hand-ui .oh-practice-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:20px}#tto-one-hand-ui .oh-eyebrow{font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:1.3px;color:var(--oh-muted);margin-bottom:5px}#tto-one-hand-ui h2{font-size:21px;font-weight:500;line-height:1.4;letter-spacing:-.4px;margin:0}#tto-one-hand-ui .oh-lesson-subtitle{font-size:13px;color:var(--oh-muted);margin-top:5px}#tto-one-hand-ui .oh-small-button{display:inline-flex;gap:6px;align-items:center;justify-content:center;border:1px solid var(--oh-line);border-radius:8px;background:var(--oh-panel);padding:7px 11px;min-height:38px;font-size:12px;white-space:nowrap}#tto-one-hand-ui .oh-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:space-between;padding:11px 0;border-top:1px solid var(--oh-line);border-bottom:1px solid var(--oh-line)}#tto-one-hand-ui .oh-metrics{display:flex;gap:24px;font-size:12px;color:var(--oh-muted)}#tto-one-hand-ui .oh-metrics strong{font-size:14px;font-weight:500;margin-left:4px;color:var(--oh-text);font-variant-numeric:tabular-nums}#tto-one-hand-ui .oh-tools{display:flex;gap:9px;align-items:center}#tto-one-hand-ui .oh-tools button{font-size:12px;border:0;background:none;padding:4px;display:flex;gap:5px;align-items:center;min-height:32px}#tto-one-hand-ui .oh-tools svg{width:15px;height:15px}#tto-one-hand-ui .oh-type-area{background:var(--oh-bg);border:1px solid var(--oh-line);border-radius:12px;padding:19px 24px;margin:18px 0 14px;min-height:126px;position:relative;outline-offset:3px}#tto-one-hand-ui .oh-passage{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:27px;letter-spacing:3px;line-height:1.65;max-width:100%;overflow-wrap:anywhere;word-break:break-all;color:var(--oh-muted)}#tto-one-hand-ui .oh-char{border-radius:3px}#tto-one-hand-ui .oh-char.current{color:var(--oh-text);background:var(--oh-blue-soft);box-shadow:0 3px 0 var(--oh-blue)}#tto-one-hand-ui .oh-char.done{color:var(--oh-green)}#tto-one-hand-ui .oh-char.wrong{color:var(--oh-red);background:var(--oh-panel)}#tto-one-hand-ui .oh-hint{font-size:12px;color:var(--oh-muted);margin-top:8px}#tto-one-hand-ui .oh-input{width:100%;margin-top:10px;padding:11px 12px;border:1px solid var(--oh-line);border-radius:8px;background:var(--oh-panel);color:var(--oh-text);font-size:16px}#tto-one-hand-ui .oh-input[hidden]{display:none}#tto-one-hand-ui .oh-progress-track{height:4px;background:var(--oh-soft);border-radius:6px;overflow:hidden}#tto-one-hand-ui .oh-progress-fill{height:100%;background:var(--oh-button);width:0%;transition:width .15s}#tto-one-hand-ui .oh-ready{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:17px 0 23px}#tto-one-hand-ui .oh-ready-copy{font-size:13px;color:var(--oh-muted);display:flex;gap:8px;align-items:center}#tto-one-hand-ui .oh-ready-copy svg{color:var(--oh-green);width:17px}#tto-one-hand-ui .oh-primary{display:inline-flex;gap:9px;align-items:center;justify-content:center;background:var(--oh-button);color:var(--oh-button-text);border:0;border-radius:9px;min-height:43px;padding:11px 20px;font-weight:500;white-space:nowrap}#tto-one-hand-ui .oh-keyboard-wrap{max-width:680px;margin:0 auto}#tto-one-hand-ui .oh-keyboard{padding:13px;background:var(--oh-soft);border:1px solid var(--oh-line);border-radius:13px}#tto-one-hand-ui .oh-key-row{display:flex;gap:5px;margin-bottom:5px}#tto-one-hand-ui .oh-key-row:last-child{margin-bottom:0}#tto-one-hand-ui .oh-key{flex:1;min-width:0;height:34px;display:flex;align-items:center;justify-content:center;background:var(--oh-panel);border:1px solid var(--oh-line);border-bottom-width:3px;border-radius:5px;font-size:11px;color:var(--oh-muted);font-weight:500}#tto-one-hand-ui .oh-key.wide{flex:1.6}#tto-one-hand-ui .oh-key.space{flex:7}#tto-one-hand-ui .oh-key.home{color:var(--oh-blue);background:var(--oh-blue-soft)}#tto-one-hand-ui .oh-key.expected{color:var(--oh-button-text);background:var(--oh-button);border-color:var(--oh-button)}#tto-one-hand-ui .oh-key-legend{display:flex;justify-content:center;align-items:center;gap:7px;margin:10px 0 0;font-size:12px;color:var(--oh-muted)}#tto-one-hand-ui .oh-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--oh-button)}#tto-one-hand-ui .oh-lower{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:20px}#tto-one-hand-ui .oh-course{padding:20px}#tto-one-hand-ui .oh-section-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}#tto-one-hand-ui .oh-section-top h2{font-size:18px}#tto-one-hand-ui .oh-course-rows{display:grid;gap:8px}#tto-one-hand-ui .oh-course-row{display:flex;align-items:center;gap:12px;text-align:left;padding:11px 13px;border:1px solid var(--oh-line);border-radius:10px;background:var(--oh-panel);width:100%}#tto-one-hand-ui .oh-course-row.current{border-color:var(--oh-blue);background:var(--oh-blue-soft)}#tto-one-hand-ui .oh-course-row .oh-number{width:29px;height:29px;display:grid;place-items:center;border-radius:8px;background:var(--oh-soft);font-size:13px;flex-shrink:0}#tto-one-hand-ui .oh-course-row.current .oh-number{background:var(--oh-panel);color:var(--oh-blue)}#tto-one-hand-ui .oh-course-row strong{font-weight:500;font-size:13px;display:block}#tto-one-hand-ui .oh-course-row small{display:block;color:var(--oh-muted);font-size:11px}#tto-one-hand-ui .oh-course-row>svg{margin-left:auto;width:16px;color:var(--oh-muted)}#tto-one-hand-ui .oh-path-note{margin-top:12px;font-size:12px;color:var(--oh-muted)}#tto-one-hand-ui .oh-progress-panel{padding:20px}#tto-one-hand-ui .oh-progress-panel h2{font-size:18px;margin-bottom:16px}#tto-one-hand-ui .oh-completion{font-size:31px;line-height:1.2;letter-spacing:-1px;font-weight:500;margin-bottom:8px}#tto-one-hand-ui .oh-completion span{font-size:14px;color:var(--oh-muted);letter-spacing:0}#tto-one-hand-ui .oh-completion-note{color:var(--oh-muted);font-size:12px;margin:10px 0 22px}#tto-one-hand-ui .oh-encouragement{padding-top:17px;border-top:1px solid var(--oh-line);font-size:13px}#tto-one-hand-ui .oh-encouragement strong{font-weight:500;display:block;margin-bottom:6px}#tto-one-hand-ui .oh-encouragement p{color:var(--oh-muted);font-size:12px}#tto-one-hand-ui .oh-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:20px;color:var(--oh-muted);font-size:12px}#tto-one-hand-ui .oh-result{padding:17px;background:var(--oh-green-soft);border:1px solid var(--oh-line);border-radius:10px;margin:16px 0;font-size:14px}#tto-one-hand-ui .oh-result[hidden]{display:none}#tto-one-hand-ui .oh-result strong{font-weight:500;color:var(--oh-green)}#tto-one-hand-ui .oh-quiet{color:var(--oh-muted);font-size:12px;margin-top:6px}#tto-one-hand-ui .oh-pause-cover{color:var(--oh-muted);text-align:center;padding:20px 0;font-size:18px}
@media(max-width:850px){#tto-one-hand-ui .oh-nav{display:none}#tto-one-hand-ui .oh-account{margin-left:auto}#tto-one-hand-ui .oh-lower{grid-template-columns:minmax(0,1fr) 220px}#tto-one-hand-ui .oh-metrics{gap:14px}}
@media(max-width:600px){#tto-one-hand-ui .oh-header{padding:13px 16px;gap:12px}#tto-one-hand-ui .oh-main{padding:18px 14px 24px}#tto-one-hand-ui h1{font-size:28px}#tto-one-hand-ui .oh-heading{align-items:flex-start;gap:12px}#tto-one-hand-ui .oh-heading p{font-size:13px}#tto-one-hand-ui .oh-free{padding:5px 8px;font-size:11px}#tto-one-hand-ui .oh-free svg{display:none}#tto-one-hand-ui .oh-hand-bar{align-items:stretch;flex-direction:column;padding:14px;gap:12px}#tto-one-hand-ui .oh-hand-picks{display:grid;grid-template-columns:1fr 1fr}#tto-one-hand-ui .oh-hand-pick{padding:10px 9px;gap:6px;font-size:13px}#tto-one-hand-ui .oh-hand-pick .oh-check{width:13px}#tto-one-hand-ui .oh-practice{padding:15px}#tto-one-hand-ui .oh-practice-top{margin-bottom:15px}#tto-one-hand-ui h2{font-size:19px}#tto-one-hand-ui .oh-tools{gap:12px}#tto-one-hand-ui .oh-metrics{gap:15px;flex-wrap:wrap}#tto-one-hand-ui .oh-toolbar{gap:7px}#tto-one-hand-ui .oh-tools button{min-height:42px}#tto-one-hand-ui .oh-type-area{padding:15px 14px}#tto-one-hand-ui .oh-passage{font-size:23px;letter-spacing:2px;line-height:1.65}#tto-one-hand-ui .oh-ready{flex-direction:column;align-items:stretch;gap:13px}#tto-one-hand-ui .oh-ready-copy{font-size:12px}#tto-one-hand-ui .oh-keyboard{padding:7px;border-radius:8px}#tto-one-hand-ui .oh-key-row{gap:3px;margin-bottom:3px}#tto-one-hand-ui .oh-key{font-size:11px;height:27px;border-radius:3px}#tto-one-hand-ui .oh-key.wide{font-size:0}#tto-one-hand-ui .oh-key.wide::after{content:attr(data-short);font-size:11px}#tto-one-hand-ui .oh-lower{grid-template-columns:1fr}#tto-one-hand-ui .oh-progress-panel{padding:18px}#tto-one-hand-ui .oh-course{padding:17px}#tto-one-hand-ui .oh-small-button{min-height:44px}#tto-one-hand-ui .oh-completion{font-size:27px}}
@media(prefers-reduced-motion:reduce){#tto-one-hand-ui *{transition:none!important}}

html[data-theme="dark"] #tto-one-hand-ui{--oh-bg:#0c1424;--oh-panel:#152138;--oh-text:#edf3ff;--oh-muted:#adbed5;--oh-line:#30415b;--oh-soft:#1b2c44;--oh-blue:#8cb4ff;--oh-blue-soft:#1c335a;--oh-green:#7cdda6;--oh-green-soft:#173b2c;--oh-button:#258657;--oh-red:#ff9aab;}
@media(prefers-color-scheme:dark){html[data-theme="system"] #tto-one-hand-ui{--oh-bg:#0c1424;--oh-panel:#152138;--oh-text:#edf3ff;--oh-muted:#adbed5;--oh-line:#30415b;--oh-soft:#1b2c44;--oh-blue:#8cb4ff;--oh-blue-soft:#1c335a;--oh-green:#7cdda6;--oh-green-soft:#173b2c;--oh-button:#258657;--oh-red:#ff9aab;}}

#tto-one-hand-ui{border-radius:0}#tto-one-hand-ui .oh-editorial{padding:28px 0 0;margin-top:32px;border-top:1px solid var(--oh-line);font-size:17px;line-height:1.8}#tto-one-hand-ui .oh-editorial h2{font-size:26px;margin:22px 0 12px}#tto-one-hand-ui .oh-editorial h3{font-size:20px;font-weight:500;margin:20px 0 10px}#tto-one-hand-ui .oh-editorial p{margin:0 0 14px;max-width:1050px}#tto-one-hand-ui .oh-editorial li{margin:8px 0}#tto-one-hand-ui .oh-editorial details{padding:15px 0;border-bottom:1px solid var(--oh-line)}#tto-one-hand-ui .oh-editorial summary{cursor:pointer;font-weight:500}#tto-one-hand-ui .oh-course-group{border:0;margin:0 0 12px}#tto-one-hand-ui .oh-course-group summary{font-size:14px;font-weight:500;cursor:pointer;padding:10px 0}#tto-one-hand-ui .oh-course-group .oh-course-row{margin-bottom:8px}#tto-one-hand-ui .oh-course-group summary small{color:var(--oh-muted);font-weight:400}#tto-one-hand-ui .oh-result-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}#tto-one-hand-ui .oh-keyboard-shell{margin-top:15px}#tto-one-hand-ui .oh-type-area{height:126px;min-height:126px;overflow:hidden;padding:0;cursor:text}#tto-one-hand-ui .oh-passage{padding:0 12px;line-height:42px;font-size:24px;letter-spacing:2px;overflow-wrap:normal;word-break:normal;white-space:pre-wrap;will-change:transform}#tto-one-hand-ui .oh-input-shell{position:relative;margin:12px 0}#tto-one-hand-ui .oh-status{font-size:13px;color:var(--oh-muted);min-height:22px;margin-top:8px}#tto-one-hand-ui .oh-status.is-error{color:var(--oh-red)}#tto-one-hand-ui .oh-settings{display:flex;align-items:center;gap:12px;flex-wrap:wrap}#tto-one-hand-ui .oh-settings label{display:flex;align-items:center;gap:7px;font-size:13px}#tto-one-hand-ui .oh-settings select{font:inherit;background:var(--oh-panel);color:var(--oh-text);padding:7px;border:1px solid var(--oh-line);border-radius:7px}#tto-one-hand-ui .oh-history{grid-column:1/-1;padding:20px;overflow:auto}#tto-one-hand-ui table{width:100%;border-collapse:collapse;min-width:440px;font-size:14px}#tto-one-hand-ui th,#tto-one-hand-ui td{text-align:left;padding:10px;border-bottom:1px solid var(--oh-line)}#tto-one-hand-ui th{font-weight:500}#tto-one-hand-ui .oh-mobile-note{display:none;font-size:13px;margin:8px 0;color:var(--oh-muted)}#tto-one-hand-ui .oh-typing-label{display:block;font-size:12px;color:var(--oh-muted)}#tto-one-hand-ui button:disabled{opacity:.55}#tto-one-hand-ui .oh-free{white-space:normal}#tto-one-hand-ui .oh-passage .oh-word{display:inline-block}#tto-one-hand-ui .oh-result p{margin-top:8px}#tto-one-hand-ui .oh-main{padding-top:24px}#tto-one-hand-ui .oh-course-link{margin-top:15px;font-size:13px}@media(max-width:600px){#tto-one-hand-ui .oh-passage{font-size:21px;letter-spacing:1px;line-height:42px}#tto-one-hand-ui .oh-mobile-note{display:block}#tto-one-hand-ui .oh-metrics{gap:10px}#tto-one-hand-ui .oh-editorial{font-size:16px}#tto-one-hand-ui .oh-settings select{font-size:16px}#tto-one-hand-ui .oh-type-area{margin-top:10px}}

#tto-one-hand-ui button:not(:disabled){cursor:pointer}@media(max-width:600px){#tto-one-hand-ui .oh-practice{display:flex;flex-direction:column}#tto-one-hand-ui .oh-practice>*{order:4}#tto-one-hand-ui .oh-practice>.oh-practice-top{order:0}#tto-one-hand-ui .oh-practice>.oh-toolbar{order:1}#tto-one-hand-ui .oh-practice>.oh-ready{order:2;margin:12px 0}#tto-one-hand-ui .oh-practice>.oh-type-area{order:3}}
/* v17.10.388: use the main course screen's compact focus bar, practice/stat
   columns, footer controls and full-size ANSI keyboard. Scope to this course. */
#tto-one-hand-ui{--oh-bg:var(--background,#f8fafc);--oh-panel:var(--surface,#fff);--oh-text:var(--text,#172033);--oh-muted:var(--text-light,#52617a);--oh-line:var(--border-soft,#e7ebf2);--oh-soft:var(--surface-alt,#f1f5f9);background:var(--oh-bg);font-family:var(--font-body,Inter,system-ui,sans-serif)}
#tto-one-hand-ui .oh-main{width:min(1500px,calc(100% - 32px));max-width:1500px;padding:14px 0 30px}
#tto-one-hand-ui .oh-crumbs{margin-bottom:10px}
#tto-one-hand-ui .oh-heading{margin:0 0 14px;gap:16px}
#tto-one-hand-ui h1{font-size:clamp(21px,2vw,28px);margin-bottom:4px;letter-spacing:-.6px}
#tto-one-hand-ui .oh-heading p{font-size:13px}
#tto-one-hand-ui .oh-hand-pick{min-height:42px;padding:8px 16px;font-size:14px}
#tto-one-hand-ui .oh-panel{border:1px solid var(--oh-line);box-shadow:0 14px 38px rgba(15,23,42,.06)}
#tto-one-hand-ui .oh-workspace-grid{display:grid;grid-template-columns:minmax(0,1fr) 176px;gap:14px;align-items:stretch;margin-bottom:16px}
#tto-one-hand-ui .oh-practice{display:block;min-width:0;padding:0;margin:0;overflow:hidden;border-radius:20px}
#tto-one-hand-ui .oh-focus-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 18px;background:var(--oh-panel);border-bottom:1px solid var(--oh-line);min-height:86px}
#tto-one-hand-ui .oh-focus-identity{display:flex;align-items:center;gap:12px;min-width:0}
#tto-one-hand-ui .oh-book-icon{display:grid;place-items:center;width:48px;height:48px;flex-shrink:0;background:var(--oh-blue-soft);border-radius:50%;font-size:24px}
#tto-one-hand-ui .oh-focus-bar .oh-eyebrow{display:block;text-transform:none;letter-spacing:0;font-size:12px;font-weight:600;color:var(--oh-muted);margin-bottom:4px}
#tto-one-hand-ui .oh-focus-bar h2{font-family:var(--font-heading,Inter,sans-serif);font-size:clamp(17px,1.4vw,21px);font-weight:650;color:var(--oh-blue);line-height:1.25}
#tto-one-hand-ui .oh-focus-facts{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
#tto-one-hand-ui .oh-focus-facts>span{display:grid;gap:3px;min-width:76px;border:1px solid var(--oh-line);border-radius:10px;padding:7px 10px;background:var(--oh-bg)}
#tto-one-hand-ui .oh-focus-facts small{font-size:10px;text-transform:uppercase;letter-spacing:.3px;color:var(--oh-muted)}
#tto-one-hand-ui .oh-focus-facts b{font-size:13px;font-weight:650}
#tto-one-hand-ui .oh-stage-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 18px;min-height:49px}
#tto-one-hand-ui .oh-stage-toolbar p{font-size:13px;color:var(--oh-muted);margin:0}
#tto-one-hand-ui .oh-stage-toolbar button{white-space:nowrap;min-height:34px;font-size:12px;padding:5px 9px;border:1px solid var(--oh-line);border-radius:8px;background:var(--oh-panel)}
#tto-one-hand-ui .oh-passage-frame{position:relative;padding:22px 24px;border-top:1px solid var(--oh-line);border-bottom:1px solid var(--oh-line);background:var(--oh-bg)}
#tto-one-hand-ui .oh-type-area{height:126px;min-height:126px;margin:0;padding:0;background:none;border:0;border-radius:0;cursor:text;overflow:hidden}
#tto-one-hand-ui .oh-type-area:focus-visible{outline:2px solid var(--oh-blue);outline-offset:5px}
#tto-one-hand-ui .oh-passage{padding:0;font-family:var(--font-mono,ui-monospace,monospace);font-size:27px;line-height:42px;letter-spacing:.11em;color:var(--oh-text)}
#tto-one-hand-ui .oh-char.current{background:var(--oh-blue-soft);box-shadow:0 3px 0 var(--oh-blue)}
#tto-one-hand-ui .oh-input-shell{position:absolute;left:24px;top:22px;width:1px;height:1px;margin:0;overflow:hidden}
#tto-one-hand-ui .oh-input,#tto-one-hand-ui .oh-typing-label{position:absolute;left:0;top:0;width:1px;height:1px;min-height:0;padding:0;border:0;margin:0;opacity:0;font-size:16px}
#tto-one-hand-ui .oh-hint{font-size:12px;color:var(--oh-muted);margin:0;padding:9px 18px 0;min-height:27px}
#tto-one-hand-ui .oh-practice-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:12px 18px}
#tto-one-hand-ui .oh-progress-block{display:flex;align-items:center;gap:10px;flex:1;min-width:160px}
#tto-one-hand-ui .oh-progress-block .oh-progress-track{flex:1;min-width:50px;height:5px;max-width:190px}
#tto-one-hand-ui .oh-character-count{font-size:11px;color:var(--oh-muted);white-space:nowrap}
#tto-one-hand-ui .oh-footer-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
#tto-one-hand-ui .oh-footer-controls button{min-height:38px;padding:8px 12px;font-size:12px;border:1px solid var(--oh-line);border-radius:9px;background:var(--oh-panel);font-weight:600}
#tto-one-hand-ui .oh-footer-controls .oh-primary{background:var(--oh-button);color:var(--oh-button-text);border-color:var(--oh-button)}
#tto-one-hand-ui #oh-end{color:var(--oh-red)}
#tto-one-hand-ui .oh-workspace-settings{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:0 18px 12px}
#tto-one-hand-ui .oh-settings .oh-secondary{font-size:11px}
#tto-one-hand-ui .oh-settings select{padding:4px 6px;font-size:12px;min-height:30px}
#tto-one-hand-ui .oh-result{margin:12px 18px}
#tto-one-hand-ui .oh-live-stats{display:grid;grid-template-columns:1fr;gap:8px;padding:10px;border-radius:16px}
#tto-one-hand-ui .oh-live-stat{display:flex;align-items:center;justify-content:space-between;gap:7px;min-height:49px;padding:8px 10px;border:1px solid var(--oh-line);border-radius:13px;background:var(--oh-panel)}
#tto-one-hand-ui .oh-live-stat>span{font-size:10px;font-weight:650;text-transform:uppercase;color:var(--oh-muted)}
#tto-one-hand-ui .oh-live-stat>strong{font-size:24px;font-weight:750;letter-spacing:-.5px;color:var(--oh-blue);font-variant-numeric:tabular-nums}
#tto-one-hand-ui .oh-live-stat:nth-child(2)>strong{color:var(--oh-green)}
#tto-one-hand-ui .oh-live-stat:nth-child(3)>strong{color:var(--oh-red)}
#tto-one-hand-ui .oh-keyboard-card{border-radius:20px;padding:18px;margin:0 0 20px}
#tto-one-hand-ui .oh-keyboard{width:100%;max-width:1120px;padding:14px;margin:0 auto;background:var(--oh-bg);border:1px solid var(--oh-line);border-radius:16px}
#tto-one-hand-ui .keyboard-row{display:flex;gap:8px}
#tto-one-hand-ui .keyboard-row+.keyboard-row{margin-top:8px}
#tto-one-hand-ui .keyboard-key-spacer{min-width:0;pointer-events:none}
#tto-one-hand-ui .key{position:relative;min-width:0;height:58px;display:flex;align-items:flex-end;justify-content:center;padding-bottom:10px;background:var(--oh-panel);border:1px solid var(--oh-line);border-radius:9px;box-shadow:0 1px 2px rgba(0,0,0,.06),0 5px 12px rgba(0,0,0,.05);transition:background .075s;cursor:default}
#tto-one-hand-ui .key-primary{font-size:clamp(12px,1.15vw,18px);font-weight:700;line-height:1;color:var(--oh-text);white-space:nowrap}
#tto-one-hand-ui .key-secondary{position:absolute;top:8px;left:8px;font-size:11px;line-height:1;color:var(--oh-muted)}
#tto-one-hand-ui .home-bump{position:absolute;bottom:4px;left:50%;transform:translateX(-50%);width:18px;height:3px;border-radius:2px;background:var(--oh-muted)}
#tto-one-hand-ui .key-next{background:#2f67f6;border-color:#2f67f6;box-shadow:0 0 0 3px rgba(47,103,246,.15)}
#tto-one-hand-ui .key-next .key-primary,#tto-one-hand-ui .key-next .key-secondary{color:#fff}
#tto-one-hand-ui .key-pressed{transform:translateY(2px)}
#tto-one-hand-ui .oh-dot{background:#2f67f6}
#tto-one-hand-ui .oh-mobile-keyboard{display:none}
#tto-one-hand-ui .oh-progress-panel,#tto-one-hand-ui .oh-course,#tto-one-hand-ui .oh-history{border-radius:16px}
@media(max-width:1000px){#tto-one-hand-ui .oh-focus-facts>span{min-width:65px;padding:6px 8px}#tto-one-hand-ui .oh-workspace-grid{grid-template-columns:minmax(0,1fr) 154px}#tto-one-hand-ui .key{height:48px}}
@media(max-width:760px){#tto-one-hand-ui .oh-workspace-grid{grid-template-columns:1fr}#tto-one-hand-ui .oh-live-stats{grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;order:2;padding:8px}#tto-one-hand-ui .oh-live-stat{flex-direction:column;align-items:center;justify-content:center;padding:7px 3px;gap:4px}#tto-one-hand-ui .oh-live-stat>strong{font-size:20px}#tto-one-hand-ui .oh-live-stat>span{font-size:9px;text-align:center}#tto-one-hand-ui .oh-focus-facts{display:none}#tto-one-hand-ui .oh-heading{align-items:flex-start;flex-direction:column;gap:12px}#tto-one-hand-ui .oh-hand-picks{display:flex}#tto-one-hand-ui .oh-keyboard{padding:9px}#tto-one-hand-ui .keyboard-row{gap:4px}#tto-one-hand-ui .keyboard-row+.keyboard-row{margin-top:4px}#tto-one-hand-ui .key{height:38px;padding-bottom:7px;border-radius:5px}#tto-one-hand-ui .key-primary{font-size:11px}#tto-one-hand-ui .key-secondary{font-size:9px;top:4px;left:4px}#tto-one-hand-ui .oh-mobile-keyboard{display:inline-flex}}
@media(max-width:480px){#tto-one-hand-ui .oh-main{width:calc(100% - 22px)}#tto-one-hand-ui .oh-focus-bar{padding:11px 13px;min-height:75px}#tto-one-hand-ui .oh-book-icon{width:37px;height:37px;font-size:20px}#tto-one-hand-ui .oh-stage-toolbar{padding:8px 13px;align-items:flex-start}#tto-one-hand-ui .oh-stage-toolbar p{font-size:12px}#tto-one-hand-ui .oh-passage-frame{padding:16px 14px}#tto-one-hand-ui .oh-practice-footer{padding:10px 13px;gap:10px}#tto-one-hand-ui .oh-footer-controls{gap:5px}#tto-one-hand-ui .oh-footer-controls button{padding:8px 10px;min-height:40px}#tto-one-hand-ui .oh-keyboard-card{padding:9px}#tto-one-hand-ui .oh-keyboard{padding:5px}#tto-one-hand-ui .keyboard-row{gap:2px}#tto-one-hand-ui .keyboard-row+.keyboard-row{margin-top:3px}#tto-one-hand-ui .key{height:31px;border-radius:4px}#tto-one-hand-ui .key-wide .key-primary{font-size:8px}#tto-one-hand-ui .key-secondary{font-size:7px;top:3px;left:3px}#tto-one-hand-ui .home-bump{width:10px;height:2px;bottom:3px}#tto-one-hand-ui .oh-workspace-settings{padding:0 13px 10px;flex-wrap:wrap}#tto-one-hand-ui .oh-settings .oh-secondary{display:none}#tto-one-hand-ui .oh-settings select{font-size:16px}#tto-one-hand-ui .oh-hint{padding-left:13px;padding-right:13px}}

/* v389: exactly three fixed lines, using the same renderer as the main lessons. */
#tto-one-hand-ui .oh-type-area{height:144px;min-height:144px;overflow:hidden}
#tto-one-hand-ui .oh-passage{--lesson-visible-lines:3;height:144px;min-height:144px;max-height:144px;overflow:hidden;line-height:48px;white-space:normal;word-break:normal;overflow-wrap:normal;letter-spacing:.06em;transform:none;will-change:auto}
#tto-one-hand-ui .lesson-character{display:inline-block;white-space:pre;line-height:inherit}
#tto-one-hand-ui .typed-character{color:var(--oh-green)}
#tto-one-hand-ui .wrong-character{color:var(--oh-red);background:var(--oh-red-soft,#fee2e2)}
#tto-one-hand-ui .current-character{background:var(--oh-blue-soft);box-shadow:0 3px 0 var(--oh-blue);border-radius:3px}
#tto-one-hand-ui .oh-course-row.available .oh-number{color:var(--oh-green);background:var(--oh-green-soft)}
#tto-one-hand-ui .oh-course-row.locked{background:var(--oh-bg);color:var(--oh-muted)}
#tto-one-hand-ui .oh-course-row.locked small{font-weight:600}
#tto-one-hand-ui .oh-lock-notice{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin:0 0 14px;padding:12px 16px;border:1px solid var(--oh-blue);background:var(--oh-blue-soft);border-radius:12px;font-size:14px}
#tto-one-hand-ui .oh-lock-notice p{flex:1;min-width:180px}
#tto-one-hand-ui .oh-lock-notice a{font-weight:650;text-decoration:underline}

/* Compact responsive lesson cards: no full-row stretched cards. */
#tto-one-hand-ui .oh-lower{grid-template-columns:minmax(0,1fr) 260px}
#tto-one-hand-ui .oh-course{min-width:0}
#tto-one-hand-ui .oh-course-group{margin-bottom:14px}
#tto-one-hand-ui .oh-course-group summary{padding:10px 0}
#tto-one-hand-ui .oh-course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr));gap:10px;align-items:stretch}
#tto-one-hand-ui .oh-course-group .oh-course-row{width:100%;max-width:330px;min-width:0;min-height:88px;margin:0;padding:12px;text-align:left;gap:10px;border-radius:12px}
#tto-one-hand-ui .oh-course-row>span:last-child{min-width:0}
#tto-one-hand-ui .oh-course-row strong{font-size:15px;line-height:1.35;overflow-wrap:anywhere}
#tto-one-hand-ui .oh-course-row small{font-size:12px;line-height:1.4;margin-top:4px;display:block}
#tto-one-hand-ui .oh-course-row .oh-number{flex:0 0 32px;width:32px;height:32px;font-size:14px}
#tto-one-hand-ui .oh-workspace-settings{padding-top:10px;flex-wrap:wrap;justify-content:flex-start}
#tto-one-hand-ui .oh-screen-reader-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
#tto-one-hand-ui .oh-lock-notice{font-size:13px;padding:10px 12px;margin:12px 0}
#tto-one-hand-ui .oh-lock-dismiss{border:0;background:transparent;font-size:22px;line-height:1;padding:6px;min-width:32px;min-height:32px}
@media(max-width:900px){#tto-one-hand-ui .oh-lower{grid-template-columns:1fr}#tto-one-hand-ui .oh-progress-panel{order:2}}
@media(max-width:560px){#tto-one-hand-ui .oh-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}#tto-one-hand-ui .oh-course-group .oh-course-row{padding:10px;gap:8px;align-items:flex-start}#tto-one-hand-ui .oh-course-row .oh-number{flex-basis:25px;width:25px;height:25px;font-size:12px}#tto-one-hand-ui .oh-course-row strong{font-size:14px}#tto-one-hand-ui .oh-course-row small{font-size:11px}}
@media(max-width:380px){#tto-one-hand-ui .oh-course-grid{grid-template-columns:1fr}}

/* Use the main lesson's exact hand drawings, isolated to this course. */
#tto-one-hand-ui .oh-keyboard-stage{position:relative;max-width:1120px;margin:auto;overflow:hidden}
#tto-one-hand-ui #handsClassicOverlay svg,#tto-one-hand-ui #handsKeyboardOverlay svg,#tto-one-hand-ui #typingHands{width:100%;height:100%;flex-shrink:0}
#tto-one-hand-ui #handsClassicOverlay,#tto-one-hand-ui #handsKeyboardOverlay{pointer-events:none}
#tto-one-hand-ui .oh-hand-styles{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:12px 0 0}
#tto-one-hand-ui .oh-hand-styles>span{font-size:12px;font-weight:600;color:var(--oh-muted)}
#tto-one-hand-ui .oh-hand-styles button{border:1px solid var(--oh-line);background:var(--oh-panel);padding:8px 12px;min-height:38px;border-radius:9px;font-size:13px;color:var(--oh-text)}
#tto-one-hand-ui .oh-hand-styles button[aria-pressed="true"]{background:var(--oh-blue-soft);border-color:var(--oh-blue);color:var(--oh-blue)}
#tto-one-hand-ui .oh-hand-styles .oh-hand-crown{font-size:11px;margin-left:3px}
#tto-one-hand-ui .oh-hand-caption{font-size:12px;line-height:1.5;color:var(--oh-muted);padding-top:8px}
#tto-one-hand-ui .oh-side-hand-panel{width:100%;padding:0}
#tto-one-hand-ui #handsContainer{width:min(100%,360px);height:260px;margin:12px auto 0;background:var(--oh-panel);border:1px solid var(--oh-line);border-radius:16px;box-shadow:none}
#tto-one-hand-ui[data-one-hand-style="side"] .oh-side-hand-panel{display:block!important}
#tto-one-hand-ui:not([data-one-hand-style="side"]) .oh-side-hand-panel{display:none!important}
#tto-one-hand-ui .oh-hand-premium-hint{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px;padding:10px 12px;background:var(--oh-blue-soft);border:1px solid var(--oh-blue);border-radius:10px;font-size:13px}
#tto-one-hand-ui .oh-hand-premium-hint a{text-decoration:underline;font-weight:600}
#tto-one-hand-ui .oh-hand-premium-hint button{margin-left:auto;border:0;background:none;color:var(--oh-text);font-size:22px;min-width:32px;min-height:32px}
@media(max-width:760px){#tto-one-hand-ui[data-one-hand-style="classic"] #handsClassicOverlay,#tto-one-hand-ui[data-one-hand-style="articulated"] #handsKeyboardOverlay,#tto-one-hand-ui[data-one-hand-style="capsule"] #handsKeyboardOverlay{display:block!important}#tto-one-hand-ui .oh-hand-styles{gap:6px}#tto-one-hand-ui .oh-hand-styles button{font-size:12px;padding:8px 10px}}

/* v393: compact controls and centered styles beneath the keyboard. */
#tto-one-hand-ui .oh-hint{padding:5px 14px 0;min-height:20px;font-size:11px;line-height:1.4}
#tto-one-hand-ui .oh-control-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px 14px;padding:8px 14px 10px}
#tto-one-hand-ui .oh-practice-footer{display:contents}
#tto-one-hand-ui .oh-progress-block{order:0;flex:0 1 170px;min-width:110px;gap:7px}
#tto-one-hand-ui .oh-progress-block .oh-progress-track{max-width:100px}
#tto-one-hand-ui .oh-workspace-settings{order:1;padding:0;gap:10px;flex:0 1 auto}
#tto-one-hand-ui .oh-footer-controls{order:2;margin-left:auto;gap:6px}
#tto-one-hand-ui .oh-footer-controls button{min-height:34px;padding:6px 10px}
#tto-one-hand-ui .oh-workspace-settings .oh-small-button{min-height:32px;font-size:12px;padding:5px 7px}
#tto-one-hand-ui .oh-settings{gap:7px}
#tto-one-hand-ui .oh-settings label{font-size:12px;gap:5px}
#tto-one-hand-ui .oh-hand-styles{justify-content:center;max-width:1120px;margin:0 auto;padding-top:9px}
#tto-one-hand-ui .oh-hand-caption{text-align:center;max-width:1120px;margin:0 auto;padding-top:6px}
#tto-one-hand-ui .oh-hand-premium-hint{max-width:1120px;margin:10px auto 0}
@media(max-width:1000px){#tto-one-hand-ui .oh-progress-block{flex-basis:120px}#tto-one-hand-ui .oh-control-bar{gap:8px 10px}}
@media(max-width:760px){#tto-one-hand-ui .oh-control-bar{padding:8px 12px 10px}#tto-one-hand-ui .oh-footer-controls{flex:1 1 100%;justify-content:flex-end}#tto-one-hand-ui .oh-footer-controls button{min-height:40px}#tto-one-hand-ui .oh-workspace-settings{flex:1;justify-content:flex-end}#tto-one-hand-ui .oh-progress-block{flex-basis:100px}}
@media(max-width:480px){#tto-one-hand-ui .oh-workspace-settings{flex:1 1 100%;justify-content:flex-start}#tto-one-hand-ui .oh-progress-block{flex:1 1 100%}#tto-one-hand-ui .oh-workspace-settings select{font-size:16px}#tto-one-hand-ui .oh-footer-controls{justify-content:flex-start}}

/* Side Hands stays beside the keyboard, including compact screens. */
#tto-one-hand-ui .oh-keyboard-layout{display:grid;grid-template-columns:minmax(0,1fr);align-items:center;gap:16px;max-width:1400px;margin:0 auto}
#tto-one-hand-ui[data-one-hand-style="side"] .oh-keyboard-layout{grid-template-columns:minmax(0,1fr) clamp(120px,18vw,250px)}
#tto-one-hand-ui .oh-keyboard-layout .oh-keyboard-stage{width:100%;min-width:0;margin:0 auto}
#tto-one-hand-ui .oh-keyboard-layout .oh-side-hand-panel{width:100%;max-width:none;min-width:0;padding:0;margin:0;align-self:center;border:0;background:transparent;box-shadow:none;border-radius:0}
#tto-one-hand-ui .oh-keyboard-layout #handsContainer{width:100%;max-width:none;height:clamp(140px,22vw,280px);min-height:0;max-height:280px;flex:none;margin:0;padding:0;border:0;background:transparent;box-shadow:none;border-radius:0}
#tto-one-hand-ui .oh-keyboard-layout #typingHands{width:100%;height:100%;display:block}
@media(max-width:1000px){#tto-one-hand-ui .oh-keyboard-layout{gap:10px}#tto-one-hand-ui[data-one-hand-style="side"] .oh-keyboard-layout{grid-template-columns:minmax(0,1fr) 130px}}
@media(max-width:760px){#tto-one-hand-ui .oh-keyboard-layout{gap:8px}#tto-one-hand-ui[data-one-hand-style="side"] .oh-keyboard-layout{grid-template-columns:minmax(0,1fr) 90px}#tto-one-hand-ui .oh-keyboard-layout #handsContainer{height:150px;min-height:0}}
@media(max-width:480px){#tto-one-hand-ui .oh-keyboard-layout{gap:5px}#tto-one-hand-ui[data-one-hand-style="side"] .oh-keyboard-layout{grid-template-columns:minmax(0,1fr) 58px}#tto-one-hand-ui .oh-keyboard-layout #handsContainer{height:110px;min-height:0}#tto-one-hand-ui[data-one-hand-style="side"] .key-primary{font-size:9px;max-width:100%;overflow:hidden}#tto-one-hand-ui[data-one-hand-style="side"] .key-wide .key-primary{font-size:6px}#tto-one-hand-ui[data-one-hand-style="side"] .key-backspace .key-primary,#tto-one-hand-ui[data-one-hand-style="side"] .key-tab .key-primary,#tto-one-hand-ui[data-one-hand-style="side"] .key-caps .key-primary,#tto-one-hand-ui[data-one-hand-style="side"] .key-enter .key-primary,#tto-one-hand-ui[data-one-hand-style="side"] .key-shift .key-primary{font-size:0}#tto-one-hand-ui[data-one-hand-style="side"] .key-wide .key-primary::after{font-size:9px}#tto-one-hand-ui[data-one-hand-style="side"] .key-backspace .key-primary::after{content:'⌫'}#tto-one-hand-ui[data-one-hand-style="side"] .key-tab .key-primary::after{content:'⇥'}#tto-one-hand-ui[data-one-hand-style="side"] .key-caps .key-primary::after{content:'⇪'}#tto-one-hand-ui[data-one-hand-style="side"] .key-enter .key-primary::after{content:'↵'}#tto-one-hand-ui[data-one-hand-style="side"] .key-shift .key-primary::after{content:'⇧'}}