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ease}.ppa-stats-card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1);transform:translateY(-2px)}.ppa-stats-card-icon{align-items:center;border-radius:12px;display:flex;flex-shrink:0;font-size:24px;height:48px;justify-content:center;width:48px}.ppa-stats-card-content{flex:1;min-width:0}.ppa-stats-card-value{color:#1d2327;font-size:28px;font-weight:700;line-height:1.2}.ppa-stats-card-label{color:#646970;font-size:13px;margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ppa-activity-chart-card{margin-top:24px}.ppa-activity-chart-container{min-height:225px}.ppa-chart-range-select{min-width:140px}.ppa-chart-tooltip{background:#fff;border:1px solid #d9d9d9;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.15);padding:10px 14px}.ppa-chart-tooltip-date{border-bottom:1px solid #f0f0f0;color:#1d2327;font-weight:600;margin:0 0 6px;padding-bottom:6px}.ppa-chart-tooltip p{font-size:13px;margin:4px 0}.ppa-dashboard-card{background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,.06);padding:24px}.ppa-dashboard-card-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:16px}.ppa-dashboard-card-title{align-items:center;color:#1d2327;display:flex;font-size:16px;font-weight:600;margin:0 0 16px}.ppa-dashboard-card-header .ppa-dashboard-card-title{margin-bottom:0}.ppa-dashboard-card-subtitle{color:#646970;font-size:12px;font-weight:400;margin-left:8px}.ppa-dashboard-card-action{padding:0}.ppa-quick-actions{display:flex;flex-direction:column;gap:9px}.ppa-quick-action-button{align-items:center;display:flex;font-weight:500;height:40px;justify-content:flex-start;text-align:left}.ppa-quick-action-button .anticon{font-size:16px}.ppa-quick-action-button--tour{color:#8c8c8c}.ppa-quick-action-button--tour:hover{background:rgba(24,144,255,.06);color:#1890ff}.ppa-popular-assignments-list{display:flex;flex-direction:column;gap:12px}.ppa-popular-assignment-item{align-items:center;background:#fafafa;border-radius:8px;display:flex;gap:12px;padding:12px;transition:background-color .2s ease}.ppa-popular-assignment-item:hover{background:#f0f0f0}.ppa-popular-assignment-rank{align-items:center;display:flex;flex-shrink:0;height:32px;justify-content:center;width:32px}.ppa-popular-assignment-rank-number{color:#8c8c8c;font-size:14px;font-weight:600}.ppa-popular-assignment-info{flex:1;min-width:0}.ppa-popular-assignment-title{color:#1d2327;display:block;font-size:14px;font-weight:500;overflow:hidden;text-decoration:none;text-overflow:ellipsis;white-space:nowrap}.ppa-popular-assignment-title:hover{color:#2271b1}.ppa-popular-assignment-submissions{color:#646970;font-size:12px}.ppa-popular-assignments-loading{padding:8px 0}.ppa-activity-table{margin-top:0}.ppa-activity-table .ant-table-thead>tr>th{background:#fafafa;color:#1d2327;font-weight:600;padding:12px 16px}.ppa-activity-table .ant-table-tbody>tr>td{padding:14px 16px}.ppa-activity-table .ant-table-tbody>tr:hover>td{background:#f6f7f7}.ppa-activity-student{align-items:center;display:flex;gap:8px}.ppa-activity-student-icon{color:#8c8c8c}.ppa-activity-score{color:#1d2327;font-weight:600}.ppa-activity-date{color:#8c8c8c;font-size:13px}.ppa-dashboard-card .ant-empty{padding:24px 0}.ppa-dashboard-card .ant-empty-description{color:#8c8c8c}@media screen and (max-width:1200px){.ppa-dashboard-top-row{grid-template-columns:1fr}.ppa-stats-cards{grid-template-columns:repeat(3,1fr)}.ppa-dashboard-grid{grid-template-columns:1fr}.ppa-dashboard-sidebar{display:grid;grid-template-columns:repeat(2,1fr)}}@media screen and (max-width:900px){.ppa-stats-cards{grid-template-columns:repeat(2,1fr)}.ppa-dashboard-sidebar{grid-template-columns:1fr}}@media screen and (max-width:600px){.ppa-dashboard-container{padding:12px}.ppa-dashboard-header{padding:20px}.ppa-dashboard-header h1{font-size:22px}.ppa-stats-cards{grid-template-columns:1fr}.ppa-stats-card{padding:16px}.ppa-stats-card-value{font-size:24px}.ppa-dashboard-card{padding:16px}.ppa-activity-table{overflow-x:auto}.ppa-activity-table .ant-table{min-width:600px}}