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16px;margin-bottom:14px;border:var(--bw) solid var(--edge)}.scenario h2{font-size:1.05rem;margin-bottom:4px;color:var(--info)}.kbd-hint{font-size:.8rem;color:var(--muted);margin-top:14px}@media(hover:none){.kbd-hint{display:none}}kbd{font:700 .75rem var(--font);background:var(--surface-2);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 5px}.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(56px,1fr));gap:8px}.review-grid button{position:relative;height:52px;border-radius:12px;border:2px dashed var(--muted);background:var(--surface);font-weight:700;cursor:pointer}.review-grid button.done{background:var(--accent);color:#16181f;border:2px solid var(--edge)}.review-grid button.flag:after{content:"";position:absolute;top:4px;right:4px;width:10px;height:10px;border-radius:50%;background:var(--bad-fill);border:1.5px solid var(--edge)}.review-grid button.right{border-color:var(--good);background:var(--good-bg)}.review-grid 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.what{flex:1;min-width:0}.toggle{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}.toggle:last-child{border:0}.toggle input[type=checkbox]{appearance:none;-webkit-appearance:none;flex:none;position:relative;cursor:pointer;width:52px;height:30px;border-radius:999px;background:var(--surface-2);border:2px solid var(--edge);transition:background .2s}.toggle input[type=checkbox]:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--surface);border:2px solid var(--edge);transition:transform .25s var(--spring)}.toggle input[type=checkbox]:checked{background:var(--good-fill)}.toggle input[type=checkbox]:checked:after{transform:translate(22px)}:root[data-theme=dark] .toggle input[type=checkbox],:root[data-theme=dark] .toggle input[type=checkbox]:after{border-color:#4a5166}select{font:inherit;padding:8px 10px;border-radius:12px;border:2px solid 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span{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--info);color:#fff;font-size:.85rem}:root[data-theme=dark] .help-btn span{color:#16181f}.help-btn:hover{transform:translate(-1px,-1px);box-shadow:3px 3px 0 var(--edge)}.help-btn:active{transform:translate(2px,2px);box-shadow:none}.help-dialog{width:min(560px,calc(100vw - 32px));max-height:calc(100vh - 48px);overflow:auto;border:var(--bw) solid var(--edge);border-radius:22px;padding:20px;background:var(--surface);color:var(--text);box-shadow:6px 6px 0 var(--edge)}.help-dialog[open]{animation:rise .3s var(--spring)}.help-dialog::backdrop{background:#050a148c}.help-head{display:flex;align-items:center;gap:8px}.help-head h2{margin:0;flex:1;font-size:1.25rem}.help-dialog section{border-top:1px solid var(--line);padding-top:10px;margin-top:12px}.help-dialog h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:6px}.help-dialog ul{margin:0;padding-left:20px}.help-dialog li{margin-bottom:6px}.terms{margin:0;display:grid;grid-template-columns:max-content 1fr;gap:6px 12px}.terms dt{font-weight:700}.terms dd{margin:0}@media(max-width:480px){.terms{grid-template-columns:1fr}.terms dd{margin-bottom:6px}}.profile-chip{margin-left:4px;padding:5px 12px;border-radius:999px;font:700 .85rem var(--font);background:var(--pink);color:#16181f;text-decoration:none;white-space:nowrap;border:2px solid var(--edge);max-width:9em;overflow:hidden;text-overflow:ellipsis}.profile-chip[hidden]{display:none}.text-input{flex:1;min-width:0;font:inherit;padding:10px 12px;border-radius:12px;border:2px solid var(--edge);background:var(--surface);color:var(--text)}.save-prompt{background:var(--info-bg)}@media(max-width:480px){.topbar{gap:6px;padding-left:12px;padding-right:12px}.profile-chip{max-width:6.5em;padding:5px 9px}}.diagram-wrap{margin:4px 0 10px}.diagram-wrap svg{display:block;width:100%;height:auto;border-radius:16px;box-shadow:var(--pop-sm)}.actions.two,.stats.two{grid-template-columns:1fr 1fr}.actions.two .action{min-height:104px}.lesson-link{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:14px 16px;border-radius:var(--radius);border:var(--bw) solid var(--edge);background:var(--surface);box-shadow:var(--pop-sm);color:var(--text);text-decoration:none;transition:transform .15s var(--spring),box-shadow .15s}.lesson-link:hover{transform:translate(-2px,-2px);box-shadow:var(--pop)}.lesson-link .ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--blue);color:#16181f;border:2px solid var(--edge)}.lesson-link.done .ico{background:var(--good-fill)}.lesson-link strong{display:block;font:800 1.05rem/1.2 var(--display)}.lesson-link span span{color:var(--muted);font-size:.88rem}.lesson-dots{display:flex;gap:6px}.lesson-dots 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