.workbook-page{padding:1.25rem;max-width:1200px;margin:0 auto;display:flex;flex-direction:column;gap:.8rem}.workbook-page .sheet-header{display:flex;justify-content:space-between;align-items:center;gap:.6rem;flex-wrap:nowrap}.workbook-page .group-line{display:flex;align-items:center;gap:.8rem;flex-wrap:wrap;flex:1}.workbook-page .group-title{font-size:1rem;font-weight:700}.workbook-page .print-date{font-size:1rem;color:var(--anuka-color-muted);font-weight:600}.workbook-page .group-tags{display:inline-flex;gap:var(--space-xs);flex-wrap:wrap;font-size:1rem}.workbook-page .group-tags span{background:var(--anuka-color-border);color:var(--anuka-color-muted);padding:.2rem .6rem;border-radius:var(--radius-full);font-weight:600}.workbook-page .header-actions{display:flex;gap:1rem;align-items:center}@media(max-width:720px){.workbook-page .sheet-header{flex-wrap:wrap}}.workbook-page label{display:flex;flex-direction:column;gap:var(--space-xs);font-size:.85rem;color:var(--anuka-color-muted)}.workbook-page .header-actions label{flex-direction:row;align-items:center;gap:.6rem}.workbook-page select{border:1px solid var(--anuka-color-accent);background:var(--anuka-color-surface);padding:.5rem .8rem;border-radius:10px;font-size:.95rem}.workbook-page button{border:none;background:var(--anuka-color-primary);color:var(--anuka-color-on-primary);border-radius:var(--radius-full);padding:.6rem 1.2rem;cursor:pointer;font-weight:600}.workbook-page .sheet{background:var(--anuka-color-surface);padding:.8rem;border-radius:var(--radius-xl);border:1px solid var(--anuka-color-border)}.workbook-page .grid{--sets: 4;display:grid;grid-template-columns:repeat(var(--sets),minmax(80px,1fr));border:1px solid #888}.workbook-page .cell{border:1px solid #b5b5b5;min-height:48px;padding:.35rem .4rem;display:flex;align-items:center;justify-content:center;text-align:center;font-size:.95rem}.workbook-page .cell.header{background:#f2e6d4;font-weight:700;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase}.workbook-page .cell.filled{font-weight:600}@media print{@page{size:A4 landscape;margin:12mm}body{background:#fff}.workbook-page{gap:0;padding:0}.workbook-page .sheet-header{margin-bottom:0}.workbook-page button,.workbook-page select,.workbook-page .header-actions{display:none}.workbook-page .sheet{border:none;padding:0;margin:0}.workbook-page .grid{border:1px solid #666}.workbook-page .cell{border-color:#999}}.workbook-page .cell.pinyin,.workbook-page .cell.english{font-size:.8rem}.workbook-page .cell.chinese{font-size:1.2rem}