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var(--ln-border-strong);background:var(--ln-surface);pointer-events:auto;border-radius:10px;gap:8px;width:276px;padding:10px;display:grid;position:absolute;box-shadow:0 6px 24px #0b1f3a2e}.image-region-form label{gap:4px;font-size:13px;display:grid}.image-region-form>div{flex-wrap:wrap;gap:6px;display:flex}.image-region-error{color:var(--ln-error);margin:0;font-size:12px}.collab-hint{color:var(--ln-muted);font-size:12px}.collab-sheets{grid-template-columns:minmax(0,1fr);gap:16px;display:grid}.collab-sheets.side-by-side{grid-template-columns:repeat(2,minmax(0,1fr))}.collab-scroll{background:var(--ln-surface);border:1px solid var(--ln-border);overscroll-behavior:contain;border-radius:10px;min-height:380px;max-height:calc(100dvh - 230px);padding:24px;overflow:auto}.collab-page{width:max-content;box-shadow:0 3px 16px var(--ln-shadow);margin:0 auto;position:relative}.collab-toolbar button[aria-pressed=true]{background:var(--ln-selected);color:var(--ln-primary-hover);border-color:var(--ln-primary)}.collab-timer{flex-wrap:wrap;align-items:center;gap:6px;display:inline-flex}.collab-timer-clock{font-variant-numeric:tabular-nums}.collab-timer button{min-height:30px;padding:4px 10px;font-size:12px}@media (max-width:700px){.collab-toolbar.collab-primary{grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;padding:6px 0;display:grid}.collab-primary>select{min-width:0;font-size:12px}.collab-primary>.writing-menu{margin:0}.collab-primary>.writing-menu>summary{padding:9px 6px;font-size:12px}.collab-primary>.collab-image-add{grid-column:1/-1}.collab-sheets.side-by-side{grid-template-columns:1fr}.collab-scroll{min-height:340px;padding:12px}.collab-side-option{display:none!important}.collab-status{font-size:11px}.collab-toolbar{gap:6px}.collab-toolbar button{padding:7px 9px;font-size:12px}}.excerpt-layer{z-index:6;position:absolute;inset:0}.excerpt-layer.excerpt-region{touch-action:none;cursor:crosshair}.excerpt-marks{pointer-events:none;position:absolute;inset:0}.excerpt-quad,.source-highlight{fill:#1769aa2e;stroke:var(--ln-primary);stroke-width:1px}.excerpt-rect{fill:#1769aa14;stroke:var(--ln-primary);stroke-width:1.5px;stroke-dasharray:5 3}.excerpt-text span{color:#0000;white-space:pre;transform-origin:0 0;cursor:text;-webkit-user-select:text;user-select:text;font-family:sans-serif;line-height:1;position:absolute}.excerpt-text span::selection{background:#1769aa4d}.collab-excerpt-bar{color:var(--ln-muted);flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;display:inline-flex}.excerpt-detail{color:var(--ln-muted);gap:4px;font-size:12px;display:grid}.excerpt-detail blockquote{border-left:3px solid var(--ln-primary);color:var(--ln-text);white-space:pre-wrap;margin:0;padding-left:8px}@media (max-width:700px){.collab-primary>.collab-excerpt-bar{grid-column:1/-1}}.card-frame{box-sizing:border-box;border:1.5px solid var(--ln-primary);width:100%;height:100%;color:var(--ln-text);background:#fff;border-radius:6px;flex-direction:column;gap:2px;padding:6px 8px;font-size:11px;line-height:1.35;display:flex;overflow:hidden}.card-frame strong{color:#123b5c;font-size:13px}.card-frame p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0}.card-frame-meta{color:var(--ln-muted);font-size:9px}.card-frame-missing{color:#9a3b2f;border-style:dashed}.card-panel{border:1px solid var(--ln-border,#d8e1e8);background:#fff;border-radius:8px;padding:8px 10px;font-size:13px}.card-panel h3{margin:0 0 6px;font-size:14px}.card-panel-columns{grid-template-columns:minmax(180px,1fr) minmax(240px,2fr);gap:12px;display:grid}@media (max-width:720px){.card-panel-columns{grid-template-columns:1fr}}.card-drafts{border:1px solid var(--ln-border,#d8e1e8);background:#fff8e6;border-radius:8px;margin:0 0 8px;padding:6px 10px}.card-drafts h4{margin:2px 0;font-size:13px}.card-draft{flex-wrap:wrap;align-items:center;gap:6px;padding:4px 0;display:flex}.card-draft strong{overflow-wrap:anywhere;max-width:100%}.card-draft small{color:var(--ln-muted);flex-basis:100%}.card-draft p[role=alert]{color:#9a3b2f;flex-basis:100%;margin:0}.card-drafts>small{color:var(--ln-muted);display:block}.card-draft-import{color:var(--ln-muted);align-items:center;gap:8px;margin:0 0 8px;font-size:13px;display:flex}.card-list{gap:4px;max-height:180px;margin:0 0 8px;padding:0;list-style:none;display:grid;overflow:auto}.card-list button{text-align:left;width:100%}.card-form{gap:6px;margin:6px 0;display:grid}.card-form textarea{resize:vertical;min-height:72px}.card-detail ul,.card-detail ol{padding-left:18px;font-size:12px}.card-detail blockquote{border-left:3px solid var(--ln-primary);white-space:pre-wrap;margin:2px 0;padding-left:8px}.card-detail-text{white-space:pre-wrap}.card-rich-blocks,.card-rich-editor,.card-rich-block-list{gap:6px;display:grid}.card-rich-editor{border:1px solid var(--ln-border,#d8e1e8);border-radius:6px;min-width:0;padding:8px}.card-rich-editor legend{padding:0 4px}.card-math-field{min-width:0;display:block}.card-math-field math-field{border:1px solid var(--ln-border,#d8e1e8);background:#fff;border-radius:4px;width:100%;min-width:0;min-height:34px;padding:4px;display:block}.card-rich-image{object-fit:contain;max-width:100%;max-height:240px;display:block}.card-frame .card-rich-blocks{min-height:0;overflow:hidden}.card-frame .card-rich-image{max-height:72px}.card-frame .card-math-field math-field{min-height:22px;max-height:34px;font-size:10px;overflow:hidden}.card-rich-block{align-items:start;gap:6px;display:flex}.card-rich-block>.card-math-field{flex:1}.card-offline-cache{flex-wrap:wrap;align-items:center;gap:6px;margin:8px 0;display:flex}.card-offline-cache small{color:var(--ln-muted);flex-basis:100%}.card-study-export{flex-wrap:wrap;align-items:center;gap:6px;margin:8px 0;display:flex}.card-study-export small{color:var(--ln-muted);flex-basis:100%}.card-delete{color:#9a3b2f}