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var(--border);border-radius:8px;background:var(--bg-2);color:var(--text-1);font:inherit;font-size:13px;text-align:left;cursor:pointer;transition:background .16s ease,border-color .16s ease,color .16s ease}.kb-select-option:hover{background:var(--bg-4);border-color:var(--border-strong);color:var(--text-0)}.kb-select-option.active{border-color:color-mix(in srgb,var(--cyan) 42%,var(--border));color:var(--text-0)}.kb-select-option:focus-visible{outline:2px solid var(--cyan);outline-offset:1px}.kb-select-check{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:99px;border:1px solid var(--border-strong);background:var(--bg-4);color:var(--cyan);font-size:12px;line-height:1}.kb-add-card{display:flex;align-items:center;gap:8px;width:100%;min-height:40px;margin-top:auto;padding:2px 6px;border:1px dashed var(--border-strong);border-radius:8px;background:transparent;color:var(--text-2);font-size:12px;text-align:left;cursor:pointer;transition:color .16s ease,border-color .16s ease,background .16s ease}.kb-add-card:hover{border-color:var(--kb-accent);background:var(--bg-4);color:var(--text-0)}.kb-add-card:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}.kb-add-card:focus-within{border-color:var(--kb-accent);background:var(--bg-4);color:var(--text-0)}.kb-add-card input{min-width:0;flex:1;align-self:stretch;min-height:32px;padding:4px 6px;border:0;border-radius:5px;outline:0;background:transparent;color:inherit;font:inherit}.kb-add-card input::placeholder{color:inherit;opacity:1}.kb-add-card input:disabled{cursor:wait}.kb-add-card-icon{font-size:18px;line-height:1}.kb-meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--text-2)}.kb-chip{display:inline-flex;gap:6px;flex-wrap:wrap}.kb-chip{padding:2px 8px;border-radius:99px;font-size:11px}.kb-empty-col{display:grid;place-items:center;flex:1;color:var(--text-2);font-size:13px;margin:8px 4px}.kb-form-dialog{width:min(520px,100%)}.kb-form-dialog form{display:flex;flex-direction:column;min-height:0}.kb-form-dialog .dialog-body{flex:1;min-height:0}.kb-check{display:flex;align-items:center;gap:8px;min-height:40px}@media(max-width:640px){.kb-column-row{grid-template-columns:1fr}.kb-column-actions{flex-direction:row;align-items:center;justify-content:space-between}.kb-column-row .kb-remove-column{flex:1}}html.native-shell{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent}html.native-shell input,html.native-shell textarea,html.native-shell [contenteditable=true]{-webkit-user-select:text;user-select:text;-webkit-touch-callout:default}.main-content:has(>.page-shell>.freeform){display:flex;flex-direction:column;overflow:hidden;overscroll-behavior:none;padding:12px}.main-content:has(>.page-shell>.freeform)>.page-shell{flex:1;min-height:0;display:flex;flex-direction:column}.page-shell>.freeform{flex:1;min-height:0}.main-content:has(>.page-shell>.idiom-lesson){display:flex;flex-direction:column;padding:12px}.page-shell>.idiom-lesson{flex:0 0 auto;min-height:0}