.rc4-course-strip,.rc4-my-courses-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}.rc4-my-course-card{border:1px solid var(--border);border-radius:16px;background:#fff;padding:18px;display:flex;justify-content:space-between;gap:20px;align-items:flex-end}.rc4-my-course-card h3{margin:5px 0 7px;font-size:20px}.rc4-my-course-card p{margin:0;color:var(--text-soft);font-size:13px}.rc4-my-course-card-actions,.rc4-library-actions{display:flex;gap:8px;flex-wrap:wrap}.rc4-course-actions{margin-top:18px}.rc4-remove{background:#fff!important;color:var(--text-soft)!important}.brain-dump-select-grid{grid-template-columns:minmax(220px,.9fr) minmax(280px,1.15fr) minmax(260px,1.15fr);align-items:end}.brain-dump-select-grid label{min-width:0}.brain-dump-select-grid select{width:100%;min-width:0;text-overflow:ellipsis}.brain-chip{cursor:pointer;font:inherit}.brain-chip:hover,.brain-chip:focus{outline:2px solid rgba(47,107,80,.18);outline-offset:2px}.brain-definition-backdrop{position:fixed;inset:0;background:rgba(20,34,27,.28);display:none;align-items:center;justify-content:center;padding:20px;z-index:1200}.brain-definition-backdrop.open{display:flex}.brain-definition-card{width:min(560px,100%);background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:0 18px 55px rgba(20,34,27,.16)}.brain-definition-card h3{margin:4px 0 10px}.brain-definition-card p{line-height:1.6;color:var(--text-soft)}.brain-definition-actions{display:flex;justify-content:flex-end;margin-top:18px}.rc4-activity-panel{margin-top:20px;border-top:1px solid var(--border);padding-top:20px}.rc4-activity-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.rc4-activity-head h3{margin:0 0 5px}.rc4-activity-head p{margin:0;color:var(--text-soft);font-size:13px;max-width:650px}.rc4-brain-summary{display:grid;grid-template-columns:auto auto;gap:3px 9px;align-items:baseline}.rc4-brain-summary strong{font-size:20px;color:var(--green-dark)}.rc4-brain-summary span{font-size:11px;color:var(--text-soft)}.rc4-activity-list{display:grid;gap:8px;margin-top:14px}.rc4-activity-row{display:flex;justify-content:space-between;gap:18px;border:1px solid var(--border);background:#fff;border-radius:12px;padding:12px 14px}.rc4-activity-row>div{display:grid;gap:2px}.rc4-activity-row span,.rc4-activity-row small,.rc4-activity-row time{font-size:12px;color:var(--text-soft)}.rc4-activity-row time{white-space:nowrap}.teacher-grid .teacher-panel:first-child{align-self:start}@media(max-width:950px){.brain-dump-select-grid{grid-template-columns:1fr}.rc4-activity-head{display:grid}.rc4-activity-row{display:grid}.rc4-activity-row time{white-space:normal}}@media(max-width:650px){.rc4-my-course-card{display:grid;align-items:start}.rc4-library-actions{display:grid}.rc4-library-actions button{width:100%}}