.lesson-group-editor { min-width: 0; }
.lesson-group-editor-toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px 18px; }
.lesson-group-editor-toolbar p { flex: 1 1 240px; color: #71717f; font-size: 12px; line-height: 1.7; margin: 0; }
.lesson-group-editor-toolbar button { flex-shrink: 0; font-size: 12px; }
.lesson-group-editor-status { min-height: 18px; margin: 10px 0; color: #53735b; font-size: 12px; }
.lesson-group-editor-status.error { color: #b42f49; }
.lesson-group-board { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 12px; align-items: start; }
.lesson-group-card { min-width: 0; border: 1px solid #ded9e9; border-radius: 13px; padding: 14px; background: #fbf9fe; transition: background-color .15s, border-color .15s; }
.lesson-group-card.is-individual { background: #f5f7f9; border-color: #dce2e8; }
.lesson-group-card.is-fixed { background: #f5f8f3; border-color: #dbe4d5; }
.lesson-group-card.is-dragover { background: #eee7fd; border-color: #8057af; box-shadow: inset 0 0 0 1px #8057af; }
.lesson-group-card header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.lesson-group-card header > div { min-width: 0; flex: 1; }
.lesson-group-card h4 { margin: 2px 0 6px; color: #3f3753; font-size: 13px; overflow-wrap: anywhere; }
.lesson-group-card header p { margin: 5px 0 0; color: #8a8396; font-size: 10px; }
.lesson-group-card header input { min-width: 0; width: 100%; padding: 7px 9px; border: 1px solid #e1daeb; border-radius: 7px; background: #fff; font-size: 12px; }
.lesson-group-card header label { margin: 0; }
.lesson-group-card header button { font-size: 22px; padding: 0 3px; line-height: 1; }
.lesson-group-students { display: grid; gap: 7px; min-height: 55px; }
.lesson-group-student { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 9px; border: 1px solid #e6e0eb; border-radius: 8px; background: #fff; cursor: grab; }
.lesson-group-student.is-fixed { cursor: default; }
.lesson-group-student.is-dragging { opacity: .4; }
.lesson-group-grip { color: #a398af; font-size: 17px; }
.lesson-group-student > span:nth-child(2) { flex: 1 1 100px; min-width: 0; font-size: 12px; font-weight: 600; overflow-wrap: anywhere; }
.lesson-group-student select { min-width: 0; max-width: 100%; width: 114px; padding: 5px; border: 1px solid #e9e3ef; border-radius: 6px; font-size: 10px; color: #77648f; }
.lesson-group-student small { font-size: 10px; color: #77816f; }
.lesson-group-empty { margin: 5px 0; color: #9a92a5; font-size: 11px; line-height: 1.6; }
.lesson-group-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.lesson-group-manager { min-width: 0; }
.lesson-group-manager-head { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-bottom: 14px; }
.lesson-group-manager-head > label:first-child { flex: 1 1 170px; max-width: 280px; font-size: 12px; }
.lesson-group-manager-head select { display: block; width: 100%; margin-top: 7px; }
.lesson-group-permission { display: flex; flex: 2 1 280px; gap: 10px; align-items: center; padding: 14px; border: 1px solid #e1d8ee; border-radius: 11px; background: #faf7ff; }
.lesson-group-permission input { width: 19px; height: 19px; flex-shrink: 0; margin: 0; accent-color: #7951a6; }
.lesson-group-permission span { min-width: 0; }
.lesson-group-permission strong { display: block; font-size: 12px; color: #57416e; }
.lesson-group-permission small { display: block; margin-top: 4px; font-size: 10px; line-height: 1.6; color: #8b7b9b; }
.lesson-group-manager-status { color: #51775b; font-size: 12px; line-height: 1.6; }
.lesson-group-manager-status:empty { display: none; }
.lesson-group-manager-status.error { color: #b42f49; }
.lesson-group-draft-note, .lesson-group-save-note { color: #8a8293; font-size: 11px; line-height: 1.7; margin: 15px 0 0; }
.lesson-group-save-note { color: #685187; }
.lesson-group-card header .lesson-group-starting-draft { line-height: 1.6; color: #806c99; margin-top: 8px; }
.lesson-group-manager-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px; margin-top: 18px; }
.lesson-group-manager-actions button { font-size: 12px; }
@media (prefers-reduced-motion: reduce) { .lesson-group-card { transition: none; } }