/* A single geometry/typography layer, shared by A4 measurement, preview and print. */
.q-block:has(.ca-card-grid)>.q-head{display:none!important}
.q-block:has(.ca-card-grid){margin-top:0!important;min-width:0}
/* Preserve the measured 180 mm content width while an oversized card row is
   scaled for A4. Expanding that width would grow square grids after measurement. */
.a4-fit-unit:has(.ca-card-grid){width:180mm!important;max-width:none!important}
.ca-card-grid,.ca-card-grid *{box-sizing:border-box}
.ca-card-grid{display:grid;grid-template-columns:repeat(var(--ca-columns,2),minmax(0,1fr));gap:10px;align-items:stretch;min-width:0;width:100%;color:var(--ca-all-color,#000)}
.ca-card{min-width:0;border:1px solid #777;border-radius:5px;background:#fff;break-inside:avoid;display:flex;flex-direction:column;font-family:var(--worksheet-font)}
.ca-card-head{display:grid;grid-template-columns:26px minmax(0,1fr) 36px;gap:6px;align-items:center;padding:7px 8px;border-bottom:1px solid #bbb;background:#f6f6f6;color:var(--ca-all-color,#000)}
.ca-number{display:grid;place-items:center;width:25px;height:25px;background:#303236;color:#fff;font:700 13px/1 var(--worksheet-font);border-radius:50%}
.ca-card-head strong{font:700 11px/1.2 var(--worksheet-font);overflow-wrap:anywhere;min-width:0}
.ca-card-head small{font:600 5.8px/1.3 var(--worksheet-font);text-align:right;letter-spacing:.04em}
.ca-card-top{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:9px;padding:10px 9px 6px;align-items:start;min-width:0}
.ca-columns-1 .ca-card-top{grid-template-columns:minmax(0,min(52%,var(--ca-main-width))) minmax(0,1fr)}
.ca-card.ca-stack .ca-card-top{grid-template-columns:minmax(0,1fr)}
.ca-stack .ca-grid-box{max-width:var(--ca-main-width);justify-self:center}
.ca-square{position:relative;width:100%;height:auto;aspect-ratio:1;min-width:0;min-height:0;align-self:start;border:1px solid #000;background:#fff;container-type:inline-size}
.ca-square.ca-grid-none{border-color:transparent}
.ca-grid-guides{position:absolute;inset:0;width:100%;height:100%;display:block;pointer-events:none}
.ca-main-char,.ca-practice-char{position:absolute;inset:0;display:grid;place-items:center;line-height:1!important;z-index:1;font-weight:400}
.ca-info-table{display:grid;grid-template-columns:60px minmax(0,1fr);min-width:0;border:1px solid #999;width:100%}
.ca-info-label,.ca-info-value{border-bottom:1px solid #ccc;padding:4px;min-width:0;line-height:1.2;overflow-wrap:anywhere;white-space:normal;display:flex;align-items:center}
.ca-info-label{border-right:1px solid #ccc;align-items:flex-start;justify-content:center;flex-direction:column;text-align:left;font-size:10px;line-height:1.2;font-weight:600;background:#fafafa;color:var(--ca-all-color,#000)}
.ca-label-zh{font-family:var(--ca-hanzi-font,var(--worksheet-font))}
.ca-info-label small,.ca-label-en-only{font:500 7px/1.25 var(--worksheet-font);letter-spacing:0;white-space:nowrap}
.ca-info-label:nth-last-child(-n+2),.ca-info-value:nth-last-child(-n+2){border-bottom:0}
.ca-columns-1 .ca-info-table{grid-template-columns:68px minmax(0,1fr)}
.ca-columns-3 .ca-info-table,.ca-columns-4 .ca-info-table{grid-template-columns:54px minmax(0,1fr)}
.ca-columns-3 .ca-info-label small,.ca-columns-4 .ca-info-label small,.ca-columns-3 .ca-label-en-only,.ca-columns-4 .ca-label-en-only{font-size:6.5px}
.ca-columns-3 .ca-card-head,.ca-columns-4 .ca-card-head{grid-template-columns:23px minmax(0,1fr);padding:5px;gap:4px}
.ca-columns-3 .ca-card-head small,.ca-columns-4 .ca-card-head small{display:none}
.ca-columns-3 .ca-card-head strong,.ca-columns-4 .ca-card-head strong{font-size:9px}
.ca-columns-3 .ca-card-top,.ca-columns-4 .ca-card-top{padding:7px 6px 5px;gap:6px}
.ca-columns-3 .ca-number,.ca-columns-4 .ca-number{width:22px;height:22px;font-size:11px}
.ca-practice-title{display:flex;align-items:baseline;gap:7px;padding:4px 9px 5px;margin-top:auto;color:var(--ca-all-color,#000)}
.ca-practice-title span{font:600 11px var(--ca-hanzi-font,var(--worksheet-font))}
.ca-practice-title strong{font:500 9px var(--worksheet-font)}
.ca-practice-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,var(--ca-cell-min)),1fr));gap:4px;margin:0 9px 9px;max-width:calc(var(--ca-practice-count)*var(--ca-cell-max) + (var(--ca-practice-count) - 1)*4px);align-items:start;min-width:0}
/* Wrapped practice rows retain square cells even with ten boxes or large text. */
.ca-columns-3 .ca-practice-title,.ca-columns-4 .ca-practice-title{flex-wrap:wrap;gap:2px;padding:4px 6px}
.ca-columns-3 .ca-practice-row,.ca-columns-4 .ca-practice-row{margin:0 6px 7px;gap:3px}
/* Proxy controls keep their native sources for events/history, without duplicate UI. */
.block-card:has(.ca-character-input) .mb-proxied-native{display:none!important}
.block-card:has(.ca-character-input) .mb-ink-control{display:none!important}
.block-card:has(.ca-character-input) .field select{min-width:0;max-width:100%;text-align:left}
.ca-input-status{display:flex;flex-direction:column;gap:2px;margin:4px 0 8px;padding:7px 9px;border:1px solid #d7dfd9;background:#f5faf6;font-size:11px;color:#405345}
.ca-input-status.has-warning{border-color:#e0c389;background:#fff9ed;color:#6e5322}
.ca-input-status span{line-height:1.35}
.ca-ai-button{width:100%;margin:0 0 6px}
.ca-ai-note{margin:0 0 12px;font-size:11px;line-height:1.45;color:var(--ink-soft)}
.ca-section-title{margin:13px 0 7px;padding-top:10px;border-top:1px solid var(--paper-line);font-size:11px;font-weight:700;color:var(--ink-soft)}
.ca-generated-list{display:flex;flex-direction:column;gap:8px}
.ca-generated-card{border:1px solid var(--ui-border);background:#fff;padding:8px}
.ca-generated-title{display:flex;align-items:center;gap:8px;margin-bottom:7px}
.ca-generated-title>span{font-size:25px;font-weight:700}
.ca-generated-title small{font-size:10px;color:var(--ink-soft)}
.ca-generated-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
.ca-generated-grid .ca-span-2{grid-column:1/-1}
.ca-toggle-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
.ca-editor-empty,.ca-empty{padding:12px;border:1px dashed #bbb;font-size:12px;color:#555}
.ca-character-input textarea{font-size:20px;line-height:1.5}
@media print{.ca-card{box-shadow:none;break-inside:avoid}.ca-grid-guides{visibility:visible!important}}