.boardTabs{gap:10px;margin:22px 0;display:flex}.boardTabs button{color:#18213d;background:#fff;border:1px solid #cdd7ef;border-radius:14px;padding:14px 24px;font-size:15px;font-weight:800}.boardTabs button.active{color:#fff;background:#172250;border-color:#172250;box-shadow:0 8px 20px #1722502b}.topicLinkList{grid-template-columns:1fr 1fr;gap:0 28px;display:grid}.topicLinkList button{color:#075c78;text-align:left;cursor:pointer;background:0 0;border:0;border-bottom:1px dotted #b9c8da;justify-content:space-between;align-items:center;padding:11px 4px;font-size:16px;display:flex}.topicLinkList button:hover,.topicLinkList button.active{color:#6548e8;background:#f6f3ff;font-weight:800}.topicLinkList small{font-size:20px}.practiceSheetList{background:#fff;border:1px solid #dce4ee;border-radius:16px;margin-top:20px;overflow:hidden}.practiceSheetList button{text-align:left;color:#0b5874;cursor:pointer;background:#fff;border:0;border-bottom:1px dotted #becbd8;grid-template-columns:minmax(280px,1fr) 120px 100px 70px;align-items:center;gap:14px;width:100%;padding:13px 18px;display:grid}.practiceSheetList button:last-child{border-bottom:0}.practiceSheetList button:hover,.practiceSheetList button.active{color:#5c42d8;background:#f1f7ff}.practiceSheetList button b{text-underline-offset:3px;text-decoration:underline}.practiceSheetList button span,.practiceSheetList button small{color:#65738e}.practiceSheetList button em{font-style:normal;font-weight:800}@media (max-width:720px){.topicLinkList{grid-template-columns:1fr}.practiceSheetList button{grid-template-columns:1fr auto}.practiceSheetList button span,.practiceSheetList button small{display:none}.boardTabs{flex-direction:column}}.worksheetPreview{z-index:9999;background:#fff;border-radius:16px;width:min(1050px,90vw);max-height:85vh;padding:24px;position:fixed;top:50%;left:50%;overflow-y:auto;transform:translate(-50%,-50%);box-shadow:0 20px 60px #0f172a40}