.iwb-app{text-align:left}.iwb-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.iwb-heading h1{font-size:38px;margin:12px 0 24px}.iwb-controls{display:flex;align-items:end;gap:15px;flex-wrap:wrap;margin:0 0 20px;background:#fff;padding:20px;border-radius:18px;border:1px solid #d8e2e9}.iwb-controls label{margin:0;flex:1;min-width:140px}.iwb-controls label:first-child{flex:2;min-width:240px}.iwb-controls select{margin-top:7px}.iwb-board{background:#f4f7fb;border:1px solid #cad9e6;border-radius:22px;padding:24px;color:#19323f}.iwb-toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.iwb-toolbar strong{font-size:22px}.iwb-toolbar>div{display:flex;flex-wrap:wrap;gap:8px}.iwb-toolbar button,.iwb-actions button,.iwb-qtop button{background:#fff;border:1px solid #cad9e6;border-radius:9px;color:#19323f;padding:11px 13px;min-height:44px;font-size:14px}.iwb-toolbar button:hover,.iwb-actions button:hover{background:#e2eef7}.iwb-prompt{font-weight:bold;margin:18px 0}.iwb-prompt span{font-weight:normal;font-size:13px;margin-left:12px}.iwb-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.iwb-grid[data-count="1"]{grid-template-columns:1fr;max-width:850px;margin:auto}.iwb-grid[data-count="9"],.iwb-grid[data-count="6"]{grid-template-columns:repeat(3,minmax(0,1fr))}.iwb-question{background:white;border:1px solid #d4e1ea;border-top:4px solid #5397b9;border-radius:16px;padding:18px;min-width:0}.iwb-question:nth-child(3n+2){border-top-color:#e8aa3e}.iwb-question:nth-child(3n){border-top-color:#db7299}.iwb-qtop{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px;color:#536773}.iwb-qtop button{font-size:12px;min-height:36px;padding:6px 11px}.iwb-qtop button[aria-pressed="true"]{background:#fff0cc;border-color:#b9801a}.iwb-sum{font-size:clamp(26px,3vw,42px);font-weight:bold;text-align:center;margin:25px 0 15px;line-height:1.4;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.iwb-answer{text-align:center;min-height:50px;font-size:30px;font-weight:bold;color:#235a40}.iwb-answer .small{font-weight:normal;color:#536773}.iwb-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:center;margin-top:10px}.iwb-actions button{font-size:12px;padding:10px}.iwb-method{margin-top:18px;padding:15px;border-radius:12px;background:#eef5fa;font-size:17px;line-height:1.65}.iwb-method ol{margin:0;padding-left:22px}.iwb-method li{margin:8px 0;overflow-wrap:anywhere}.iwb-frames{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:15px}.iwb-frame{display:grid;grid-template-columns:repeat(5,1fr);gap:3px;width:145px;padding:5px;border:1px solid #79909f;background:white}.iwb-frame>span{display:grid;place-items:center;aspect-ratio:1;border:1px solid #bdcbd5}.iwb-frame i{width:80%;height:80%;border-radius:50%;background:#287baa}.iwb-frame i.pink{background:#d94e85}.iwb-note{font-size:12px}.iwb-present{position:fixed;inset:0;z-index:50;overflow:auto;background:#f4f7fb;padding:20px!important}.iwb-present .iwb-heading,.iwb-present .iwb-controls,.iwb-present .iwb-note{display:none}.iwb-present .iwb-board{border:0;padding:5px}.iwb-board:fullscreen{overflow:auto;border-radius:0;padding:30px;background:#f4f7fb}.iwb-grid[data-count="1"] .iwb-sum{font-size:clamp(38px,6vw,70px)}.iwb-grid[data-count="1"] .iwb-method{font-size:24px}.iwb-grid[data-count="1"] .iwb-answer{font-size:42px}@media(min-width:1400px){.iwb-present .iwb-sum,.iwb-board:fullscreen .iwb-sum{font-size:48px}}@media(max-width:800px){.iwb-grid[data-count="9"],.iwb-grid[data-count="6"]{grid-template-columns:repeat(2,minmax(0,1fr))}.iwb-board{padding:14px}.iwb-heading{flex-wrap:wrap}}@media(max-width:550px){.iwb-grid,.iwb-grid[data-count="9"],.iwb-grid[data-count="6"]{grid-template-columns:1fr}.iwb-present{padding:10px!important}.iwb-controls label:first-child{min-width:100%}.iwb-heading h1{font-size:30px}}
.iwb-column{font-family:ui-monospace,monospace;text-align:right;width:max-content;min-width:5ch;margin:16px auto 0;line-height:1.35;letter-spacing:.08em}.iwb-rule{border-top:2px solid #19323f}.iwb-division{display:flex;justify-content:center;margin:18px auto;gap:8px;font-family:ui-monospace,monospace}.iwb-division span:last-child{border-top:2px solid #19323f;border-left:2px solid #19323f;padding:0 10px}.iwb-array{display:grid;gap:4px;justify-content:center;margin:18px auto}.iwb-array i{width:12px;height:12px;border-radius:50%;background:#287baa}.iwb-sum:has(.iwb-column),.iwb-sum:has(.iwb-division){font-size:28px}.iwb-sum .test-frac,.iwb-answer .test-frac{font-size:.85em}.iwb-answer{overflow-wrap:anywhere}.iwb-grid[data-count="9"] .iwb-sum,.iwb-grid[data-count="6"] .iwb-sum{font-size:25px}
.iwb-answer-box{display:inline-block;vertical-align:middle;min-width:2.2em;min-height:1.5em;padding:.12em .3em;border:2px solid #8b9eac;border-radius:8px;background:#f1f5f8;color:#536773;font:inherit;line-height:1.25;text-align:center;cursor:pointer;max-width:100%;overflow-wrap:anywhere}.iwb-answer-box.revealed{background:#e9f5ed;border-color:#388768;color:#235a40}.iwb-answer-box:hover{border-color:#287baa}.iwb-sum{margin:16px 0;line-height:1.65}.iwb-column{margin:8px auto;line-height:1.4}.iwb-rule{padding-top:5px}.iwb-division-work{width:max-content;max-width:100%;margin:8px auto}.iwb-quotient{text-align:right;margin-bottom:4px}.iwb-division{margin:0;justify-content:flex-end}.iwb-question{padding:14px}.iwb-actions{margin-top:8px}.iwb-grid[data-count="12"]{grid-template-columns:repeat(4,minmax(0,1fr))}.iwb-grid[data-count="12"] .iwb-sum{font-size:24px}.iwb-grid[data-count="12"] .iwb-actions button{padding:8px;font-size:11px}.iwb-grid[data-count="12"] .iwb-method{font-size:15px}@media(max-width:1100px){.iwb-grid[data-count="12"]{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:800px){.iwb-grid[data-count="12"]{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:550px){.iwb-grid[data-count="12"]{grid-template-columns:1fr}}
