.classroom-page .pc-page-body{padding-top:24px;padding-bottom:48px;}
.classroom-wrap{max-width:960px;margin:0 auto;padding:0 20px;}
.classroom-hero{margin-bottom:24px;}
.classroom-hero h1{font-size:26px;font-weight:800;margin:0 0 8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.classroom-hero p{margin:0;color:#6b7280;font-size:14px;line-height:1.6;}
.classroom-preview-badge{display:inline-block;padding:4px 10px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-size:11px;font-weight:800;}
.classroom-login-box{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:24px;margin-bottom:20px;}
.classroom-login-title{margin:0 0 8px;font-size:16px;font-weight:800;color:#111827;}
.classroom-login-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.classroom-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;align-items:center;}
.classroom-user-label{font-weight:700;font-size:14px;color:#111827;}
.classroom-toolbar select{padding:10px 12px;border:1.5px solid #e5e7eb;border-radius:10px;font-size:14px;min-width:240px;flex:1;max-width:100%;}
.classroom-link-btn{text-decoration:none;display:inline-flex;align-items:center;justify-content:center;}
.classroom-summary{margin-bottom:14px;}
.classroom-week-grid{margin-bottom:14px;}
.classroom-week-tabs{margin-bottom:16px;}
.classroom-assign-grid{display:flex;flex-direction:column;gap:14px;}
.classroom-card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:20px 18px;margin-bottom:0;}
.classroom-card-head{margin-bottom:8px;}
.classroom-card h3{margin:0 0 10px;font-size:18px;font-weight:900;}
.classroom-card .due{font-size:12px;color:#b45309;margin-bottom:10px;font-weight:700;}
.classroom-card .desc{font-size:14px;line-height:1.6;color:#374151;white-space:pre-wrap;margin-bottom:12px;}
.classroom-card textarea{width:100%;min-height:120px;padding:12px;border:1.5px solid #e5e7eb;border-radius:10px;font-size:14px;font-family:inherit;resize:vertical;box-sizing:border-box;}
.classroom-meta{margin:0 0 10px;font-size:12px;color:#6b7280;}
.classroom-status{display:inline-flex;padding:4px 10px;border-radius:999px;font-size:11px;font-weight:800;margin-bottom:10px;}
.classroom-status.submitted{background:#eff6ff;color:#1d4ed8;}
.classroom-status.graded{background:#ecfdf5;color:#059669;}
.classroom-btn{padding:11px 18px;border:none;border-radius:10px;background:#E8192C;color:#fff;font-size:14px;font-weight:700;cursor:pointer;font-family:inherit;text-decoration:none;}
.classroom-btn.secondary{background:#f3f4f6;color:#374151;}
.classroom-feedback{margin-top:10px;padding:12px;background:#fffbeb;border:1px solid #fde68a;border-radius:10px;font-size:13px;line-height:1.5;}
.classroom-empty{color:#6b7280;font-size:14px;margin:0;}
.classroom-empty-box{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:28px 22px;text-align:center;}
.classroom-empty-box .classroom-btn{margin-top:14px;display:inline-flex;}
.classroom-hint{margin:12px 0 0;font-size:12px;color:#6b7280;line-height:1.6;}
.classroom-attach{margin:0 0 10px;font-size:13px;}
.classroom-attach a{color:#1d4ed8;font-weight:700;}
.classroom-file-field{margin:10px 0;}
.classroom-file-label{display:block;font-size:12px;font-weight:700;color:#374151;margin-bottom:6px;}
.classroom-file-field input[type=file]{font-size:13px;width:100%;}

@media (max-width:768px){
  .classroom-wrap{padding:0 14px;}
  .classroom-toolbar select{min-width:0;width:100%;}
  .classroom-link-btn,.classroom-btn{width:100%;min-height:44px;}
  .classroom-login-actions .classroom-btn{width:100%;min-height:44px;justify-content:center;}
}

.instructor-portal-page .classroom-wrap{max-width:1100px;}
.instructor-student-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid #f3f4f6;font-size:13px;}
.instructor-tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.instructor-tab{padding:9px 14px;border-radius:9px;border:1.5px solid #e5e7eb;background:#fff;font-weight:700;font-size:13px;cursor:pointer;}
.instructor-tab.on{background:#111827;color:#fff;border-color:#111827;}
.inst-form-input{width:100%;padding:12px;margin-bottom:8px;border:1.5px solid #e5e7eb;border-radius:10px;font-size:14px;font-family:inherit;box-sizing:border-box;}
.inst-grade{margin-top:8px;}

.week-lecture-card{background:#fff;border:1px solid #dbeafe;border-radius:16px;padding:20px 18px;margin-bottom:14px;background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);}
.week-lecture-head h3{margin:0 0 10px;font-size:18px;font-weight:900;color:#111827;}
.week-lecture-memo{margin:0 0 12px;font-size:14px;line-height:1.6;color:#374151;white-space:pre-wrap;}
.week-link-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px;}
.week-link-btn{display:inline-flex;align-items:center;gap:8px;padding:11px 16px;border-radius:10px;font-size:14px;font-weight:800;text-decoration:none;}
.week-link-btn.live{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe;}
.week-link-btn.recording{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0;}
.week-material-row{display:flex;flex-direction:column;gap:8px;}
.week-material-link{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#374151;text-decoration:none;}
.week-material-link:hover{color:#1d4ed8;}
.week-material-fname{font-weight:500;color:#6b7280;font-size:12px;}
.week-material-link-ext .fa-external-link-alt{color:#2563eb;}
.week-material-list{margin:0 0 12px;padding:0;list-style:none;}
.week-material-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid #f3f4f6;font-size:13px;}
.week-material-remove{border:none;background:#fee2e2;color:#b91c1c;border-radius:8px;padding:6px 10px;font-size:12px;font-weight:700;cursor:pointer;}
.inst-check-row{display:flex;align-items:center;gap:8px;margin:10px 0 14px;font-size:13px;font-weight:700;color:#374151;}
.inst-week-actions{display:flex;flex-wrap:wrap;gap:10px;}
.inst-week-card-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.week-list-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px;}
.week-list-head h3{margin:0;}
.week-pub{display:inline-flex;padding:4px 10px;border-radius:999px;font-size:11px;font-weight:800;}
.week-pub.on{background:#ecfdf5;color:#059669;}
.week-pub.off{background:#f3f4f6;color:#6b7280;}
.mypage-week-links{margin-top:14px;padding-top:14px;border-top:1px solid #eef2f7;}
.mypage-week-links-title{display:block;font-size:12px;font-weight:800;color:#6b7280;margin-bottom:8px;}
.mypage-week-link-row{display:flex;flex-wrap:wrap;gap:8px;}
.mypage-week-link{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-size:12px;font-weight:800;text-decoration:none;}
.mypage-week-link.rec{background:#ecfdf5;color:#047857;}
.mypage-week-note{margin:8px 0 0;font-size:12px;color:#6b7280;}
.inst-week-hint{margin:0 0 14px;}

.week-split-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px;}
.week-split-card h3{margin-top:0;}
.week-list-split{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px;}
.week-list-block{padding:10px 12px;border-radius:10px;background:#f9fafb;border:1px solid #eef2f7;font-size:13px;}
.week-list-block.live{border-color:#bfdbfe;background:#f8fbff;}
.week-list-block.rec{border-color:#a7f3d0;background:#f0fdf4;}
.week-list-block.off{opacity:.85;}
.cohort-materials-box{margin-bottom:16px;}
.cohort-materials-card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:18px;}
.cohort-materials-card h3{margin:0 0 12px;font-size:16px;font-weight:900;}
.cohort-materials-list{display:flex;flex-direction:column;gap:8px;}
.week-lecture-live,.week-lecture-rec{margin-bottom:14px;}
.week-lecture-live h4,.week-lecture-rec h4{margin:0 0 8px;font-size:14px;font-weight:800;color:#374151;}
@media (max-width:768px){
  .week-split-grid,.week-list-split{grid-template-columns:1fr;}
}
.inst-student-toolbar{display:flex;gap:8px;margin:0 0 14px;}
.inst-stu-filter.on{background:#fff7ed;border-color:#fcd34d;color:#b45309;}
.inst-student-table-wrap{overflow:auto;}
.inst-student-table{width:100%;border-collapse:collapse;font-size:13px;}
.inst-student-table th,.inst-student-table td{padding:10px 12px;border-bottom:1px solid #f3f4f6;text-align:left;vertical-align:top;}
.inst-student-table th{font-size:12px;color:#6b7280;background:#fafafa;}
.inst-notice-body{white-space:normal;line-height:1.6;}
.cohort-notices-box{margin-bottom:16px;}
.cohort-notices-card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:18px;}
.cohort-notices-card h3{margin:0 0 12px;font-size:16px;font-weight:900;}
.cohort-notices-list{display:flex;flex-direction:column;gap:12px;}
.cohort-notice-item{padding:12px 14px;border:1px solid #f3f4f6;border-radius:12px;background:#fafafa;}
.cohort-notice-item h4{margin:0 0 8px;font-size:14px;font-weight:800;color:#111827;}
.cohort-notice-body{font-size:13px;color:#374151;line-height:1.6;}
.inst-portal-wrap{max-width:1080px;}
.inst-portal-hero{background:linear-gradient(135deg,#111827 0%,#1f2937 55%,#374151 100%);border-radius:20px;padding:28px 26px;margin-bottom:20px;color:#fff;}
.inst-portal-eyebrow{margin:0 0 6px;font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#fca5a5;}
.inst-portal-hero h1{margin:0 0 8px;font-size:28px;font-weight:900;color:#fff;}
.inst-portal-hero p{margin:0;color:#d1d5db;font-size:14px;line-height:1.6;}
.inst-portal-topbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:14px 16px;margin-bottom:14px;}
.inst-portal-user{display:flex;align-items:center;gap:10px;min-width:180px;}
.inst-portal-avatar{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#E8192C,#fb7185);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:16px;flex-shrink:0;}
.inst-portal-user strong{display:block;font-size:15px;color:#111827;}
.inst-portal-sub{display:block;font-size:12px;color:#6b7280;margin-top:2px;}
.inst-portal-cohort{flex:1;min-width:220px;padding:11px 12px;border:1.5px solid #e5e7eb;border-radius:12px;font-size:14px;background:#fafafa;}
.inst-portal-tabs{margin-bottom:18px;}
.instructor-tab{display:inline-flex;align-items:center;gap:6px;}
.inst-section-head{margin:0 0 14px;}
.inst-section-head h2{margin:0 0 4px;font-size:20px;font-weight:900;color:#111827;}
.inst-section-head p{margin:0;font-size:13px;color:#6b7280;}
.inst-form-card{border-radius:16px;box-shadow:0 8px 24px rgba(17,24,39,.04);}
.inst-student-toolbar{display:flex;align-items:center;gap:8px;margin-bottom:14px;flex-wrap:wrap;}
.inst-stu-filter{padding:8px 14px;border-radius:999px;border:1.5px solid #e5e7eb;background:#fff;font-size:13px;font-weight:700;cursor:pointer;}
.inst-stu-filter.on{background:#111827;color:#fff;border-color:#111827;}
.inst-student-count{margin-left:auto;font-size:13px;font-weight:800;color:#6b7280;}
.inst-student-grid{display:block;}
.inst-student-table-wrap{overflow:auto;background:#fff;border:1px solid #e8ecf1;border-radius:14px;}
.inst-student-table{width:100%;border-collapse:collapse;font-size:14px;}
.inst-student-table th,.inst-student-table td{padding:13px 16px;border-bottom:1px solid #f1f5f9;text-align:left;vertical-align:middle;}
.inst-student-table th{font-size:12px;font-weight:800;color:#64748b;background:#f8fafc;letter-spacing:0.02em;}
.inst-student-table tbody tr:last-child td{border-bottom:none;}
.inst-student-table tbody tr:hover td{background:#fafbfc;}
.inst-student-table .col-name{font-weight:800;color:#0f172a;white-space:nowrap;min-width:88px;}
.inst-student-table .col-phone{color:#475569;font-variant-numeric:tabular-nums;white-space:nowrap;min-width:120px;}
.inst-student-table .col-phone a{color:#475569;text-decoration:none;font-weight:600;}
.inst-student-table .col-phone a:hover{color:#0f172a;}
.inst-student-table .col-class{color:#64748b;font-weight:600;line-height:1.45;}
.inst-student-table .muted{color:#94a3b8;}
@media (max-width:640px){
  .inst-student-table th,.inst-student-table td{padding:11px 12px;font-size:13px;}
  .inst-student-table .col-class{min-width:160px;}
}
.inst-empty-card{grid-column:1/-1;}
.inst-channel-box{display:flex;gap:14px;background:linear-gradient(180deg,#fff7ed 0%,#fff 100%);border:1px solid #fed7aa;border-radius:16px;padding:18px;margin-bottom:16px;}
.inst-channel-box.is-set{background:linear-gradient(180deg,#ecfdf5 0%,#fff 100%);border-color:#a7f3d0;}
.inst-channel-icon{width:44px;height:44px;border-radius:12px;background:#fb923c;color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;}
.inst-channel-box.is-set .inst-channel-icon{background:#10b981;}
.inst-channel-body{flex:1;min-width:0;}
.inst-channel-body h3{margin:0 0 6px;font-size:16px;font-weight:900;}
.inst-channel-body p{margin:0 0 10px;font-size:13px;color:#6b7280;line-height:1.5;}
.inst-channel-form{display:flex;flex-direction:column;gap:6px;align-items:stretch;}
.inst-channel-form .inst-form-input{width:100%;min-width:0;margin:0;box-sizing:border-box;}
.inst-channel-saved{margin:8px 0 0;font-size:12px;color:#059669;font-weight:700;}
.inst-channel-saved a{color:#047857;text-decoration:underline;}
.classroom-channel-box{margin-bottom:16px;}
.classroom-channel-link{display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 18px;border-radius:14px;background:linear-gradient(135deg,#fff7ed,#ffedd5);border:1px solid #fdba74;color:#9a3412;font-weight:800;text-decoration:none;font-size:14px;}
@media (max-width:768px){
  .inst-portal-hero{padding:22px 18px;}
  .inst-portal-hero h1{font-size:22px;}
  .inst-portal-cohort{width:100%;}
  .inst-channel-form .classroom-btn,.inst-channel-form .inst-form-input{width:100%;}
}
.week-part-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;}
.week-part-actions .classroom-btn{padding:6px 12px;font-size:12px;min-height:32px;}
.classroom-wrap{max-width:1040px;}
.classroom-hero-stu{margin-bottom:18px;}
.classroom-stu-header{position:relative;overflow:hidden;border-radius:24px;padding:0;margin-bottom:18px;color:#fff;background:linear-gradient(135deg,#0B1220 0%,#152238 48%,#1C2A44 100%);box-shadow:0 22px 50px rgba(11,18,32,.28);isolation:isolate;}
.classroom-stu-header-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transform:scale(1.08);transition:opacity .45s ease;pointer-events:none;z-index:0;}
.classroom-stu-header-bg.is-on{opacity:.28;}
.classroom-stu-header-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(105deg,rgba(11,18,32,.92) 0%,rgba(11,18,32,.78) 42%,rgba(21,34,56,.55) 100%);}
.classroom-stu-header-glow{position:absolute;right:-60px;top:-80px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(232,25,44,.42),transparent 68%);pointer-events:none;z-index:1;}
.classroom-stu-header-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:22px;align-items:flex-end;justify-content:space-between;padding:26px 28px;}
.classroom-stu-eyebrow{margin:0 0 8px;font-size:11px;font-weight:800;letter-spacing:.16em;color:#F5A3AB;}
.classroom-stu-title{margin:0 0 8px;font-size:26px;font-weight:900;color:#fff;line-height:1.25;text-shadow:0 2px 18px rgba(0,0,0,.25);}
.classroom-stu-meta{margin:0;font-size:13px;color:#D6D2CB;line-height:1.5;}
.classroom-stu-progress{min-width:210px;flex:0 1 300px;}
.classroom-stu-progress-bar{height:10px;border-radius:999px;background:rgba(255,255,255,.14);overflow:hidden;margin-bottom:10px;box-shadow:inset 0 1px 2px rgba(0,0,0,.2);}
.classroom-stu-progress-bar span{display:block;height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,#E8192C,#fb7185);box-shadow:0 0 16px rgba(232,25,44,.45);transition:width .45s cubic-bezier(.22,1,.36,1);}
.classroom-stu-progress-label{margin:0;font-size:12px;font-weight:700;color:#F7F4EF;}
.cr-section-head{margin:0 0 14px;}
.cr-section-title{margin:0 0 4px;font-size:18px;font-weight:900;color:#111827;display:flex;align-items:center;gap:8px;}
.cr-section-title i{color:#E8192C;font-size:16px;}
.cr-section-desc{margin:0;font-size:13px;color:#6b7280;}
.classroom-roadmap-wrap{margin-bottom:20px;}
.cr-roadmap{background:#fff;border:1px solid #e5e7eb;border-radius:20px;padding:22px 20px;box-shadow:0 10px 30px rgba(17,24,39,.04);}
.cr-roadmap-track{display:flex;flex-direction:column;gap:0;}
.cr-road-step{display:flex;gap:14px;padding-bottom:22px;position:relative;}
.cr-road-step.last{padding-bottom:0;}
.cr-road-rail{width:28px;flex-shrink:0;display:flex;justify-content:center;position:relative;}
.cr-road-rail::after{content:'';position:absolute;top:28px;bottom:0;left:50%;width:2px;margin-left:-1px;background:#e5e7eb;}
.cr-road-step.last .cr-road-rail::after{display:none;}
.cr-road-dot{width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid #d1d5db;margin-top:6px;position:relative;z-index:1;box-shadow:0 0 0 4px #fff;}
.cr-road-step.active .cr-road-dot{border-color:#2563eb;background:#eff6ff;}
.cr-road-step.done .cr-road-dot{border-color:#10b981;background:#ecfdf5;}
.cr-road-step.current .cr-road-dot{border-color:#E8192C;background:#fff7ed;box-shadow:0 0 0 4px #fff,0 0 0 6px rgba(232,25,44,.15);}
.cr-road-body{flex:1;min-width:0;background:#fafafa;border:1px solid #eef2f7;border-radius:16px;padding:16px 18px;transition:border-color .2s,box-shadow .2s;}
.cr-road-step.current .cr-road-body{border-color:#fecaca;background:#fff;box-shadow:0 8px 24px rgba(232,25,44,.08);}
.cr-road-step.done .cr-road-body{background:#f0fdf4;border-color:#bbf7d0;}
.cr-road-head{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:8px;margin-bottom:10px;}
.cr-road-week{display:block;font-size:10px;font-weight:800;letter-spacing:.1em;color:#9ca3af;margin-bottom:4px;}
.cr-road-title{margin:0;font-size:16px;font-weight:900;color:#111827;}
.cr-road-open{font-size:12px;font-weight:800;color:#E8192C;text-decoration:none;white-space:nowrap;}
.cr-road-open:hover{text-decoration:underline;}
.cr-road-memo{margin:0 0 12px;font-size:13px;line-height:1.6;color:#4b5563;white-space:pre-wrap;}
.cr-road-links{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px;}
.cr-road-link{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;font-size:13px;font-weight:800;text-decoration:none;}
.cr-road-link.live{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe;}
.cr-road-link.rec{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0;}
.cr-road-assigns{display:flex;flex-direction:column;gap:6px;}
.cr-road-assign{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:10px;background:#fff;border:1px solid #e5e7eb;text-decoration:none;color:#374151;font-size:13px;font-weight:700;}
.cr-road-assign.done{border-color:#bbf7d0;background:#f0fdf4;}
.cr-road-assign i{color:#6b7280;width:14px;text-align:center;}
.cr-road-assign-badge{margin-left:auto;font-size:11px;font-style:normal;font-weight:800;padding:3px 8px;border-radius:999px;}
.cr-notices-section,.cr-materials-section{margin-bottom:18px;}
.cr-notice-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;}
.cr-notice-card{display:flex;gap:12px;padding:16px;border-radius:16px;background:#fff;border:1px solid #e5e7eb;}
.cr-notice-card.featured{border-color:#bfdbfe;background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);}
.cr-notice-icon{width:40px;height:40px;border-radius:12px;background:#eff6ff;color:#2563eb;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.cr-notice-content h3{margin:0 0 4px;font-size:15px;font-weight:900;color:#111827;}
.cr-notice-date{margin:0 0 8px;font-size:12px;font-weight:600;color:#9ca3af;display:flex;align-items:center;gap:5px;}
.cr-notice-date i{font-size:11px;opacity:.85;}
.cr-notice-body{font-size:13px;line-height:1.6;color:#374151;}
.cr-material-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;}
.cr-material-card{position:relative;display:flex;flex-direction:column;gap:6px;padding:16px;border-radius:16px;background:#fff;border:1px solid #e5e7eb;text-decoration:none;color:#111827;min-height:120px;transition:transform .15s,box-shadow .15s,border-color .15s;}
.cr-material-card:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(17,24,39,.08);border-color:#d1d5db;}
.cr-material-card.is-link{background:linear-gradient(180deg,#f8fbff 0%,#fff 100%);border-color:#bfdbfe;}
.cr-material-type{font-size:10px;font-weight:800;letter-spacing:.06em;color:#6b7280;text-transform:uppercase;}
.cr-material-icon{width:36px;height:36px;border-radius:10px;background:#f3f4f6;color:#374151;display:flex;align-items:center;justify-content:center;font-size:16px;}
.cr-material-card.is-link .cr-material-icon{background:#eff6ff;color:#2563eb;}
.cr-material-title{font-size:14px;font-weight:900;line-height:1.4;}
.cr-material-sub{font-size:12px;color:#6b7280;}
.cr-material-go{position:absolute;right:14px;bottom:14px;color:#9ca3af;font-size:12px;}
.cr-channel-card{display:flex;gap:14px;background:linear-gradient(135deg,#fff7ed 0%,#fff 100%);border:1px solid #fed7aa;border-radius:18px;padding:18px 20px;margin-bottom:18px;}
.cr-channel-icon{width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,#fb923c,#f97316);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;}
.cr-channel-body h3{margin:0 0 6px;font-size:16px;font-weight:900;color:#111827;}
.cr-channel-body p{margin:0 0 12px;font-size:13px;color:#6b7280;line-height:1.5;}
.cr-channel-btn{display:inline-flex;align-items:center;gap:8px;padding:11px 16px;border-radius:12px;background:#111827;color:#fff;font-size:13px;font-weight:800;text-decoration:none;}
.cr-week-detail-wrap{margin-top:8px;}
.cr-back-link{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;font-size:13px;font-weight:800;color:#6b7280;text-decoration:none;}
.cr-back-link:hover{color:#111827;}
.cr-assign-section{margin-top:16px;}
.cr-assign-card{border-radius:18px;box-shadow:0 8px 24px rgba(17,24,39,.04);}
.cr-empty-state{text-align:center;padding:40px 24px;background:#fff;border:1px dashed #e5e7eb;border-radius:18px;color:#6b7280;}
.cr-empty-state i{font-size:28px;color:#d1d5db;margin-bottom:12px;}
.cr-empty-state p{margin:0 0 6px;font-size:15px;font-weight:800;color:#374151;}
.cr-empty-state span{display:block;font-size:13px;margin-bottom:14px;}
.classroom-week-tabs{margin-bottom:14px;overflow-x:auto;-webkit-overflow-scrolling:touch;}
@media (max-width:768px){
  .classroom-stu-header{border-radius:18px;}
  .classroom-stu-title{font-size:20px;}
  .classroom-stu-progress{flex:1 1 100%;min-width:0;}
  .cr-road-body{padding:14px;}
  .cr-material-grid,.cr-notice-grid{grid-template-columns:1fr;}
  .cr-channel-card{flex-direction:column;}
}
.cr-stu-nav{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;padding:6px;background:#f3f4f6;border-radius:16px;border:1px solid #e5e7eb;}
.cr-stu-nav-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 16px;border-radius:12px;font-size:14px;font-weight:800;color:#374151;text-decoration:none;background:transparent;transition:background .15s,color .15s,box-shadow .15s;flex:1 1 auto;justify-content:center;min-height:44px;}
.cr-stu-nav-btn i{font-size:14px;color:#6b7280;}
.cr-stu-nav-btn.on{background:#fff;color:#111827;box-shadow:0 4px 14px rgba(17,24,39,.08);}
.cr-stu-nav-btn.on i{color:#E8192C;}
.cr-stu-nav-count{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:#e5e7eb;font-size:11px;font-weight:800;color:#374151;}
.cr-stu-nav-btn.on .cr-stu-nav-count{background:#fee2e2;color:#E8192C;}
.cr-stu-panels{margin-bottom:20px;}.cr-stu-panels[hidden]{display:none !important;}.cr-stu-nav[hidden]{display:none !important;}
.cr-stu-panel{display:none !important;}
.cr-stu-panel.on{display:block !important;}
.cr-stu-category-section,.cr-notices-section{margin-bottom:0;}
.cr-stu-subsection{margin-top:22px;padding-top:22px;border-top:1px solid #e5e7eb;}
.cr-stu-week-list{display:flex;flex-direction:column;gap:12px;}
.cr-stu-week-card{background:#fff;border:1px solid #e5e7eb;border-radius:18px;padding:18px 20px;box-shadow:0 6px 20px rgba(17,24,39,.04);}
.cr-stu-week-head{margin-bottom:12px;}
.cr-stu-week-badge{display:inline-block;padding:4px 10px;border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.08em;margin-bottom:8px;}
.cr-stu-week-badge.live{background:#eff6ff;color:#1d4ed8;}
.cr-stu-week-badge.rec{background:#ecfdf5;color:#047857;}
.cr-stu-week-head h3{margin:0;font-size:17px;font-weight:900;color:#111827;}
.cr-stu-week-memo{margin:0 0 14px;font-size:13px;line-height:1.6;color:#4b5563;white-space:pre-wrap;}
.cr-stu-week-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:12px;font-size:14px;font-weight:800;text-decoration:none;}
.cr-stu-week-btn.live{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe;}
.cr-stu-week-btn.rec{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0;}
.cr-assign-week-group{margin-bottom:20px;}
.cr-assign-week-group:last-child{margin-bottom:0;}
.cr-assign-week-title{margin:0 0 12px;font-size:15px;font-weight:900;color:#374151;padding-left:4px;}
@media (max-width:768px){
  .cr-stu-nav{flex-direction:column;padding:8px;}
  .cr-stu-nav-btn{width:100%;justify-content:flex-start;}
}

.classroom-hero-lms{position:relative;padding:28px 26px 24px;border-radius:22px;background:linear-gradient(145deg,#0B1220 0%,#152238 48%,#1C2A44 100%);color:#F7F4EF;overflow:hidden;box-shadow:0 18px 40px rgba(11,18,32,.28);}
.classroom-hero-lms::before{content:'';position:absolute;inset:auto -40px -60px auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(232,25,44,.35),transparent 70%);pointer-events:none;}
.classroom-hero-eyebrow{margin:0 0 8px;font-size:11px;font-weight:800;letter-spacing:.16em;color:#F5A3AB;}
.classroom-hero-lms h1{color:#fff;margin-bottom:10px;}
.classroom-hero-lms p{color:#D6D2CB;max-width:42em;}
.classroom-hero-sessions{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.classroom-hero-session-btn{display:inline-flex;align-items:center;justify-content:center;min-width:58px;padding:7px 12px;border-radius:999px;border:1px solid rgba(247,244,239,.18);background:rgba(247,244,239,.06);color:#F7F4EF;font-size:12px;font-weight:800;cursor:pointer;font-family:inherit;transition:background .15s,border-color .15s,transform .15s;}
.classroom-hero-session-btn:hover{background:rgba(247,244,239,.14);border-color:rgba(247,244,239,.35);}
.classroom-hero-session-btn.is-ready{border-color:rgba(232,25,44,.55);}
.classroom-hero-session-btn.is-on{background:#E8192C;border-color:#E8192C;color:#fff;box-shadow:0 6px 16px rgba(232,25,44,.35);}
.lms-session-dot.is-active{outline:2px solid #fff;outline-offset:2px;}
.lms-session-card.is-clickable{cursor:pointer;transition:transform .15s ease,box-shadow .15s ease;}
.lms-session-card.is-clickable:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(11,18,32,.1);}
.lms-session-open-hint{margin:0;font-size:12px;font-weight:700;color:#E8192C;}
.lms-week-detail-head{gap:10px;}
.lms-week-back{display:inline-flex;align-items:center;gap:8px;margin-bottom:8px;padding:8px 12px;border-radius:10px;border:1.5px solid #e5e7eb;background:#fff;font-size:13px;font-weight:800;color:#374151;cursor:pointer;font-family:inherit;}
.lms-week-back:hover{background:#f9fafb;}
.lms-week-block{margin-top:18px;padding:16px 16px 14px;border:1px solid #e8ecf1;border-radius:16px;background:#fff;}
.lms-week-block-title{margin:0 0 12px;font-size:15px;font-weight:900;color:#111827;display:flex;align-items:center;gap:8px;}
.lms-week-block-title i{color:#E8192C;}
.lms-week-block .lms-cta{margin-right:8px;margin-bottom:8px;}

.lms-session-track{display:flex;gap:8px;margin-top:12px;}
.lms-session-dot{width:34px;height:34px;border-radius:50%;border:2px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff;font-size:12px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;padding:0;}
.lms-session-dot.is-ready{border-color:#E8192C;background:rgba(232,25,44,.2);}
.lms-session-dot.is-live{border-color:#FBBF24;background:rgba(251,191,36,.25);color:#FFF7ED;}
.lms-session-dot.is-done{border-color:#34D399;background:rgba(52,211,153,.2);}
.lms-sessions-section{margin:0;}
.lms-session-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;}
.lms-session-card{background:#FBF9F6;border:1px solid #E6E1DA;border-radius:18px;padding:18px 18px 16px;box-shadow:0 10px 28px rgba(11,18,32,.05);display:flex;flex-direction:column;gap:12px;min-height:100%;}
.lms-session-card-head{display:flex;flex-direction:column;gap:6px;}
.lms-session-no{display:inline-flex;align-self:flex-start;padding:4px 10px;border-radius:999px;background:#0B1220;color:#fff;font-size:11px;font-weight:800;letter-spacing:.04em;}
.lms-session-card-head h3{margin:0;font-size:17px;font-weight:900;color:#0B1220;line-height:1.35;}
.lms-session-badges{display:flex;flex-wrap:wrap;gap:6px;}
.lms-session-badge{display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;font-size:11px;font-weight:800;}
.lms-badge-upcoming{background:#EEF2F7;color:#475569;}
.lms-badge-live{background:#FEF3C7;color:#B45309;}
.lms-badge-ended{background:#E5E7EB;color:#4B5563;}
.lms-badge-vod{background:#DCFCE7;color:#047857;}
.lms-badge-zoom{background:#DBEAFE;color:#1D4ED8;}
.lms-badge-mat{background:#E8EEF5;color:#1C2A44;}
.lms-chip-muted{background:#F3F4F6;color:#6B7280;}
.lms-chip-ok{background:#DCFCE7;color:#047857;}
.lms-chip-warn{background:#FEF3C7;color:#B45309;}
.lms-chip-closed{background:#FEE2E2;color:#B91C1C;}
.lms-chip-todo{background:#FEE2E2;color:#E8192C;}
.lms-session-memo{margin:0;font-size:13px;line-height:1.55;color:#4B5563;white-space:pre-wrap;}
.lms-session-ctas{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;}
.lms-cta{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:11px 14px;border-radius:12px;font-size:13px;font-weight:800;text-decoration:none;border:none;cursor:pointer;font-family:inherit;min-height:42px;}
.lms-cta-zoom{background:#E8192C;color:#fff;}
.lms-cta-vod{background:#0B1220;color:#fff;}
.lms-cta-mat{background:#fff;color:#0B1220;border:1.5px solid #D6D2CB;}
.lms-cta-assign{background:#fff;color:#E8192C;border:1.5px solid #FECACA;}
.lms-session-wait{margin:0;font-size:13px;color:#6B7280;}
.lms-assign-closed{margin:0 0 10px;font-size:12px;font-weight:700;color:#B91C1C;}
.hw-badge-reviewed{background:#DCFCE7;color:#047857;}
.hw-badge-revision{background:#FEF3C7;color:#B45309;}
.hw-badge-closed{background:#FEE2E2;color:#B91C1C;}
.lms-inst-dash{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-bottom:16px;}
.lms-dash-card{background:#FBF9F6;border:1px solid #E6E1DA;border-radius:14px;padding:14px 14px 12px;display:flex;flex-direction:column;gap:6px;}
.lms-dash-card.warn{border-color:#FDE68A;background:#FFFBEB;}
.lms-dash-card.alert{border-color:#FECACA;background:#FEF2F2;}
.lms-dash-label{font-size:11px;font-weight:800;color:#6B7280;letter-spacing:.02em;}
.lms-dash-card strong{font-size:22px;font-weight:900;color:#0B1220;line-height:1;}
.lms-dash-card.alert strong{color:#E8192C;}
.inst-grade-card .grade-save-btn{margin-top:4px;}
.inst-grade-card .classroom-card-head{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
@media (max-width:768px){
  .classroom-hero-lms{padding:22px 18px;}
  .lms-session-grid{grid-template-columns:1fr;}
  .lms-cta{flex:1 1 calc(50% - 8px);}
  .lms-inst-dash{grid-template-columns:repeat(2,minmax(0,1fr));}
}
.inst-portal-toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(12px);z-index:9999;max-width:min(92vw,420px);padding:12px 18px;border-radius:12px;background:#0B1220;color:#fff;font-size:14px;font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,.22);opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;}
.inst-portal-toast.is-on{opacity:1;transform:translateX(-50%) translateY(0);}
.inst-history-block{margin-top:22px;padding-top:6px;}
.inst-history-head{margin:0 0 12px;}
.inst-history-head h3{margin:0 0 4px;font-size:16px;font-weight:900;color:#111827;display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;}
.inst-history-count{font-size:13px;font-weight:800;color:#6b7280;}
.inst-history-head p{margin:0;font-size:13px;color:#6b7280;line-height:1.5;}
.inst-history-filters{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px;}
.inst-history-chip{padding:7px 13px;border-radius:999px;border:1.5px solid #e5e7eb;background:#fff;font-size:12px;font-weight:800;color:#4b5563;cursor:pointer;font-family:inherit;}
.inst-history-chip.on{background:#111827;border-color:#111827;color:#fff;}
.inst-history-list{display:flex;flex-direction:column;gap:12px;}
.inst-history-card{background:#fff;border:1px solid #e8ecf1;border-radius:16px;padding:16px 18px;box-shadow:0 8px 22px rgba(17,24,39,.04);}
.inst-history-card-head{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:8px;}
.inst-history-card-head h4{margin:0;font-size:16px;font-weight:900;color:#111827;line-height:1.35;flex:1 1 180px;}
.inst-history-badges{display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.inst-history-badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:11px;font-weight:800;}
.inst-history-badge.is-on{background:#dcfce7;color:#047857;}
.inst-history-badge.is-off{background:#f3f4f6;color:#6b7280;}
.inst-history-badge.is-type{background:#eef2ff;color:#3730a3;}
.inst-history-meta{margin:0 0 8px;font-size:12px;font-weight:700;color:#6b7280;}
.inst-history-preview{margin:0 0 10px;font-size:13px;line-height:1.55;color:#4b5563;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.inst-history-card .classroom-attach{margin:0 0 10px;}
.inst-history-card .classroom-btn{margin-top:2px;}
@media (max-width:768px){
  .inst-history-card{padding:14px 14px;}
  .inst-history-card-head h4{font-size:15px;}
}
.classroom-stu-header-main{display:flex;align-items:center;gap:18px;min-width:0;flex:1 1 auto;}
.classroom-stu-thumb-wrap{position:relative;width:108px;height:108px;flex-shrink:0;}
.classroom-stu-thumb{width:108px;height:108px;object-fit:cover;border-radius:18px;flex-shrink:0;background:rgba(255,255,255,.08);border:2px solid rgba(255,255,255,.22);box-shadow:0 14px 34px rgba(0,0,0,.35);}
.classroom-stu-thumb-fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;border-radius:18px;background:linear-gradient(145deg,rgba(232,25,44,.35),rgba(255,255,255,.08));border:2px solid rgba(255,255,255,.18);color:#fff;font-size:34px;box-shadow:0 14px 34px rgba(0,0,0,.28);}
.classroom-stu-thumb-fallback[hidden]{display:none !important;}
.classroom-page .pc-page-body{background:linear-gradient(180deg,#F4F6FA 0%,#EEF2F7 42%,#F8FAFC 100%);min-height:60vh;}
.classroom-page .classroom-wrap{position:relative;}
.classroom-hero-stu{margin-bottom:20px;}
.classroom-hero-lms{animation:classroomHeroIn .55s ease both;}
@keyframes classroomHeroIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}
.classroom-toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px;align-items:center;padding:12px 14px;background:#fff;border:1px solid #E6E1DA;border-radius:18px;box-shadow:0 10px 28px rgba(11,18,32,.05);}
.classroom-toolbar-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-left:auto;}
.classroom-user-label{font-weight:800;font-size:13px;color:#475569;padding:0 4px;}
.classroom-btn{transition:transform .15s ease,box-shadow .15s ease,background .15s ease;}
.classroom-btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(232,25,44,.22);}
.classroom-btn.secondary:hover{box-shadow:0 8px 18px rgba(17,24,39,.08);}
.classroom-cohort-picker{position:relative;flex:1 1 280px;min-width:200px;max-width:560px;}
.classroom-cohort-trigger{width:100%;display:flex;align-items:center;gap:12px;padding:8px 12px;border:1.5px solid #E6E1DA;border-radius:14px;background:linear-gradient(180deg,#fff 0%,#FBF9F6 100%);font-family:inherit;font-size:14px;font-weight:700;color:#0B1220;cursor:pointer;text-align:left;box-shadow:0 2px 0 rgba(11,18,32,.03);transition:border-color .15s,box-shadow .15s;}
.classroom-cohort-trigger:hover{border-color:#FECACA;box-shadow:0 8px 20px rgba(232,25,44,.08);}
.classroom-cohort-trigger[aria-expanded="true"]{border-color:#E8192C;box-shadow:0 10px 24px rgba(232,25,44,.12);}
.classroom-cohort-trigger > i{margin-left:auto;color:#9CA3AF;font-size:12px;transition:transform .2s;}
.classroom-cohort-trigger[aria-expanded="true"] > i{transform:rotate(180deg);color:#E8192C;}
.classroom-cohort-trigger-thumb{width:42px;height:42px;object-fit:cover;border-radius:10px;background:#F3F4F6;flex-shrink:0;border:1px solid #EDE9E3;}
.classroom-cohort-trigger-label{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.classroom-cohort-menu{position:absolute;left:0;right:0;top:calc(100% + 8px);z-index:40;max-height:340px;overflow:auto;background:#fff;border:1px solid #E6E1DA;border-radius:16px;box-shadow:0 22px 50px rgba(11,18,32,.16);padding:8px;animation:classroomMenuIn .18s ease both;}
@keyframes classroomMenuIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}
.classroom-cohort-option{width:100%;display:flex;align-items:center;gap:12px;padding:10px;border:none;border-radius:12px;background:transparent;font-family:inherit;color:#111827;text-align:left;cursor:pointer;transition:background .12s;}
.classroom-cohort-option:hover,.classroom-cohort-option.is-on{background:#FEF2F2;}
.classroom-cohort-option.is-on{box-shadow:inset 3px 0 0 #E8192C;}
.classroom-cohort-option img,.classroom-cohort-thumb-fallback{width:48px;height:48px;object-fit:cover;border-radius:11px;background:#F3F4F6;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;color:#9CA3AF;border:1px solid #EDE9E3;}
.classroom-cohort-option span{min-width:0;font-size:13px;font-weight:700;line-height:1.35;}
.classroom-cohort-option span em{display:block;font-style:normal;font-weight:600;color:#6B7280;font-size:12px;margin-top:2px;}
.classroom-cohort-empty{padding:14px 10px;text-align:center;color:#6B7280;font-size:13px;}
.cr-stu-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px;padding:8px;background:linear-gradient(180deg,#fff 0%,#F8FAFC 100%);border-radius:18px;border:1px solid #E6E1DA;box-shadow:0 10px 28px rgba(11,18,32,.05);}
.cr-stu-nav-btn{display:inline-flex;align-items:center;gap:8px;padding:13px 16px;border-radius:14px;font-size:14px;font-weight:800;color:#475569;text-decoration:none;background:transparent;transition:background .18s,color .18s,box-shadow .18s,transform .15s;flex:1 1 auto;justify-content:center;min-height:48px;}
.cr-stu-nav-btn:hover{background:#F8FAFC;color:#0B1220;}
.cr-stu-nav-btn i{font-size:14px;color:#94A3B8;transition:color .15s;}
.cr-stu-nav-btn.on{background:linear-gradient(135deg,#0B1220 0%,#1C2A44 100%);color:#fff;box-shadow:0 12px 28px rgba(11,18,32,.22);transform:translateY(-1px);}
.cr-stu-nav-btn.on i{color:#F5A3AB;}
.cr-stu-nav-count{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;padding:0 7px;border-radius:999px;background:#E5E7EB;font-size:11px;font-weight:800;color:#374151;}
.cr-stu-nav-btn.on .cr-stu-nav-count{background:rgba(232,25,44,.95);color:#fff;}
.lms-session-card{background:linear-gradient(180deg,#FFFFFF 0%,#FBF9F6 100%);border:1px solid #E6E1DA;border-radius:20px;padding:20px 18px 18px;box-shadow:0 14px 34px rgba(11,18,32,.06);display:flex;flex-direction:column;gap:12px;min-height:100%;position:relative;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease,border-color .18s;}
.lms-session-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,#E8192C,#fb7185);opacity:.35;}
.lms-session-card.is-clickable:hover{transform:translateY(-4px);box-shadow:0 22px 44px rgba(11,18,32,.12);border-color:#FECACA;}
.lms-session-card.is-clickable:hover::before{opacity:1;}
.lms-session-no{display:inline-flex;align-self:flex-start;padding:5px 11px;border-radius:999px;background:linear-gradient(135deg,#0B1220,#1C2A44);color:#fff;font-size:11px;font-weight:800;letter-spacing:.04em;box-shadow:0 6px 14px rgba(11,18,32,.2);}
.lms-cta{transition:transform .15s ease,box-shadow .15s ease;}
.lms-cta:hover{transform:translateY(-1px);}
.lms-cta-zoom{box-shadow:0 8px 18px rgba(232,25,44,.25);}
.lms-cta-vod{box-shadow:0 8px 18px rgba(11,18,32,.18);}
.cr-stu-week-card{background:linear-gradient(180deg,#fff 0%,#FBF9F6 100%);border:1px solid #E6E1DA;border-radius:20px;padding:20px 22px;box-shadow:0 14px 34px rgba(11,18,32,.06);transition:transform .15s,box-shadow .15s;}
.cr-stu-week-card:hover{transform:translateY(-2px);box-shadow:0 20px 40px rgba(11,18,32,.1);}
.cr-stu-week-btn{transition:transform .15s,box-shadow .15s;}
.cr-stu-week-btn:hover{transform:translateY(-1px);}
.cr-stu-week-btn.live{box-shadow:0 8px 18px rgba(37,99,235,.12);}
.cr-stu-week-btn.rec{box-shadow:0 8px 18px rgba(4,120,87,.12);}
.lms-week-block{margin-top:18px;padding:18px 18px 16px;border:1px solid #E6E1DA;border-radius:18px;background:linear-gradient(180deg,#fff 0%,#FBF9F6 100%);box-shadow:0 10px 26px rgba(11,18,32,.04);}
.cr-channel-card{display:flex;gap:16px;background:linear-gradient(135deg,#FFF7ED 0%,#fff 58%);border:1px solid #FDBA74;border-radius:20px;padding:20px 22px;margin-bottom:18px;box-shadow:0 14px 32px rgba(249,115,22,.1);}
.cr-channel-btn{transition:transform .15s,box-shadow .15s;}
.cr-channel-btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(11,18,32,.2);}
.cr-notice-card,.cr-material-card{transition:transform .15s,box-shadow .15s,border-color .15s;}
.cr-notice-card.featured{box-shadow:0 14px 30px rgba(37,99,235,.08);}
.cr-empty-state{background:linear-gradient(180deg,#fff 0%,#F8FAFC 100%);border:1px dashed #D6D2CB;border-radius:20px;box-shadow:0 10px 24px rgba(11,18,32,.03);}
.lms-session-track{gap:10px;}
.lms-session-dot{width:36px;height:36px;transition:transform .15s,box-shadow .15s,background .15s;}
.lms-session-dot:hover{transform:scale(1.08);}
.lms-session-dot.is-ready{box-shadow:0 0 0 3px rgba(232,25,44,.25);}
.lms-session-dot.is-active{outline:2px solid #fff;outline-offset:2px;box-shadow:0 0 0 4px rgba(232,25,44,.35);}
@media (max-width:768px){
  .classroom-stu-header-inner{padding:20px 18px;border-radius:18px;}
  .classroom-stu-title{font-size:20px;}
  .classroom-stu-progress{flex:1 1 100%;min-width:0;}
  .classroom-toolbar{padding:12px;flex-direction:column;align-items:stretch;}
  .classroom-toolbar-actions{margin-left:0;width:100%;}
  .classroom-toolbar-actions .classroom-link-btn,.classroom-toolbar-actions .classroom-btn{flex:1;}
  .cr-stu-nav{flex-direction:column;padding:8px;}
  .cr-stu-nav-btn{width:100%;justify-content:flex-start;}
}
@media (max-width:720px){
  .classroom-stu-thumb-wrap,.classroom-stu-thumb,.classroom-stu-thumb-fallback{width:76px;height:76px;border-radius:14px;}
  .classroom-stu-thumb-fallback{font-size:26px;}
  .classroom-cohort-picker{flex:1 1 100%;max-width:none;}
}
.classroom-hero-title-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 20px;margin-bottom:10px;}
.classroom-hero-title-row h1{margin:0;}
.classroom-hero-instructor{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding:10px 14px;border-radius:14px;background:rgba(247,244,239,.08);border:1px solid rgba(247,244,239,.16);backdrop-filter:blur(6px);}
.classroom-hero-inst-name{font-size:14px;font-weight:800;color:#F7F4EF;white-space:nowrap;}
.classroom-hero-inst-chat{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:linear-gradient(135deg,#E8192C,#fb7185);color:#fff;font-size:13px;font-weight:800;text-decoration:none;box-shadow:0 8px 20px rgba(232,25,44,.28);transition:transform .15s,box-shadow .15s;}
.classroom-hero-inst-chat:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(232,25,44,.36);color:#fff;}
.classroom-hero-inst-chat[hidden]{display:none !important;}
@media (max-width:768px){
  .classroom-hero-title-row{align-items:flex-start;flex-direction:column;}
  .classroom-hero-instructor{width:100%;}
  .classroom-hero-inst-chat{width:100%;justify-content:center;}
}
.classroom-hero-instructor{flex-direction:column;align-items:flex-start;}
.classroom-hero-inst-contact{margin:0;font-size:13px;font-weight:700;color:#F7F4EF;opacity:.92;letter-spacing:.01em;}
.classroom-hero-inst-contact[hidden]{display:none !important;}
.inst-channel-label{display:block;font-size:12px;font-weight:800;color:#374151;margin:4px 0 0;}
.inst-channel-form .inst-channel-label + .inst-form-input{margin-bottom:8px;}
.lms-session-schedule{margin:0;font-size:13px;font-weight:700;color:#E8192C;display:flex;align-items:center;gap:6px;}
.cr-cal{margin-top:4px;padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff 0%,#FBF9F6 100%);border:1px solid #E6E1DA;box-shadow:0 10px 26px rgba(11,18,32,.05);}
.cr-cal-nav{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px;}
.cr-cal-title{font-size:17px;font-weight:900;color:#0B1220;letter-spacing:-.02em;}
.cr-cal-nav-btn{width:36px;height:36px;border:1px solid #E6E1DA;border-radius:12px;background:#fff;color:#0B1220;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;}
.cr-cal-nav-btn:hover{border-color:#E8192C;color:#E8192C;}
.cr-cal-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;}
.cr-cal-dow{text-align:center;font-size:12px;font-weight:800;color:#9CA3AF;padding:2px 0 6px;}
.cr-cal-day{min-height:72px;border-radius:14px;background:#fff;border:1px solid transparent;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:8px 2px 6px;gap:4px;box-sizing:border-box;}
.cr-cal-day.is-pad{background:transparent;min-height:48px;border:0;padding:0;}
.cr-cal-day.has-class{cursor:pointer;}
.cr-cal-day.has-class:hover{background:#FFF5F5;}
.cr-cal-num-wrap{width:36px;height:36px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;border:2px solid transparent;box-sizing:border-box;}
.cr-cal-day.has-class .cr-cal-num-wrap{border-color:#E8192C;background:#fff;}
.cr-cal-day.is-today:not(.has-class) .cr-cal-num{color:#E8192C;}
.cr-cal-num{font-size:13px;font-weight:800;color:#0B1220;line-height:1;}
.cr-cal-day.has-class .cr-cal-num{color:#E8192C;}
.cr-cal-sess{display:block;max-width:100%;font-size:10px;font-weight:800;color:#E8192C;letter-spacing:-.02em;line-height:1.2;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.cr-cal-events{display:flex;flex-direction:column;gap:8px;margin-top:14px;}
.cr-cal-event{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:12px 14px;border-radius:14px;border:1px solid #E6E1DA;background:#fff;cursor:pointer;}
.cr-cal-event:hover{border-color:#E8192C;box-shadow:0 8px 20px rgba(232,25,44,.08);}
.cr-cal-event-no{flex-shrink:0;min-width:48px;padding:5px 8px;border-radius:999px;background:#0B1220;color:#fff;font-size:11px;font-weight:800;text-align:center;}
.cr-cal-event-body{min-width:0;display:flex;flex-direction:column;gap:2px;}
.cr-cal-event-body strong{font-size:14px;font-weight:900;color:#0B1220;}
.cr-cal-event-body em{font-style:normal;font-size:12px;font-weight:700;color:#E8192C;}
@media (max-width:640px){
  .cr-cal{padding:12px;}
  .cr-cal-day{min-height:64px;padding:6px 1px 4px;gap:2px;}
  .cr-cal-num-wrap{width:30px;height:30px;}
  .cr-cal-num{font-size:12px;}
  .cr-cal-sess{font-size:9px;}
}
.inst-form-hint{margin:0 0 12px;font-size:13px;font-weight:600;color:#6B7280;line-height:1.45;}