:root{--bg: #f4f6fb;--bg-elevated: #ffffff;--bg-soft: #eef1f8;--border: #e2e8f0;--border-strong: #cbd5e1;--text: #0f172a;--text-muted: #64748b;--text-soft: #94a3b8;--brand: #6a39f5;--brand-dark: #5429d4;--brand-soft: #efe9ff;--brand-glow: rgba(106, 57, 245, .18);--success: #059669;--success-soft: #d1fae5;--warning: #d97706;--warning-soft: #fef3c7;--danger: #dc2626;--danger-soft: #fee2e2;--ai: #0d9488;--ai-soft: #ccfbf1;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .06);--radius: 14px;--radius-sm: 10px;--sidebar-width: 260px;--font: "Manrope", "Segoe UI", system-ui, sans-serif;--font-display: "Unbounded", "Manrope", sans-serif}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:var(--font);color:var(--text);background:radial-gradient(1200px 600px at 10% -10%,rgba(106,57,245,.12),transparent 55%),radial-gradient(900px 500px at 100% 0%,rgba(13,148,136,.08),transparent 50%),var(--bg);-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}a{color:inherit;text-decoration:none}h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;letter-spacing:-.02em;margin:0}p{margin:0}.app-shell{display:grid;grid-template-columns:var(--sidebar-width) 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:12px 18px 24px;display:flex;flex-direction:column;gap:28px;background:linear-gradient(180deg,#1a1235,#120d24);color:#f8fafc;border-right:1px solid rgba(255,255,255,.06)}.brand{display:flex;flex-direction:column;align-items:center;gap:20px;padding:0 18px}.brand img{width:120px;object-fit:contain;border-radius:14px}.brand-text{display:flex;flex-direction:column;align-items:center;gap:2px}.brand-name{font-family:var(--font-display);font-size:15px;font-weight:600}.brand-sub{font-size:16px;font-weight:700;color:#fff;text-align:center}.nav{display:flex;flex-direction:column;gap:6px;flex:1}.nav-link{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;color:#f8fafcb8;transition:background .15s,color .15s}.nav-link:hover{background:#ffffff0f;color:#fff}.nav-link.active{background:linear-gradient(135deg,var(--brand),#8b5cf6);color:#fff;box-shadow:0 8px 20px #6a39f559}.nav-icon{width:20px;text-align:center;opacity:.9}.sidebar-footer{padding:14px;border-radius:12px;background:#ffffff0d;font-size:12px;color:#f8fafc8c;line-height:1.45}.main{padding:28px 32px 48px;min-width:0}.page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:28px}.page-header h1{font-size:28px;margin-bottom:6px}.page-header p{color:var(--text-muted);font-size:15px;max-width:560px;line-height:1.5}.page-actions{display:flex;gap:10px;flex-shrink:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border-radius:12px;border:1px solid transparent;cursor:pointer;font-weight:600;font-size:14px;transition:transform .12s,box-shadow .12s,background .12s,border-color .12s}.btn:disabled{opacity:.55;cursor:not-allowed;transform:none!important}.btn:not(:disabled):hover{transform:translateY(-1px)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px var(--brand-glow)}.btn-primary:hover{background:var(--brand-dark)}.btn-secondary{background:var(--bg-elevated);border-color:var(--border);color:var(--text)}.btn-secondary:hover{border-color:var(--border-strong);background:var(--bg-soft)}.btn-ai{background:linear-gradient(135deg,#0d9488,#0f766e);color:#fff;box-shadow:0 8px 18px #0d948840}.btn-ghost{background:transparent;color:var(--text-muted);border-color:transparent}.btn-danger{background:var(--danger-soft);color:var(--danger)}.btn-sm{padding:8px 12px;font-size:13px;border-radius:10px}.grid-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}.stat-card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.stat-label{color:var(--text-muted);font-size:13px;margin-bottom:8px}.stat-value{font-family:var(--font-display);font-size:28px;font-weight:600}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.course-card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;transition:border-color .15s,transform .15s}.course-card:hover{border-color:#c4b5fd;transform:translateY(-2px)}.course-card-clickable{cursor:pointer}.course-card-clickable:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.course-card-top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600}.badge-ai{background:var(--ai-soft);color:var(--ai)}.badge-manual{background:var(--brand-soft);color:var(--brand)}.badge-draft{background:var(--warning-soft);color:var(--warning)}.course-card h3{font-size:17px;line-height:1.3}.course-card .desc{color:var(--text-muted);font-size:14px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1}.meta-row{display:flex;flex-wrap:wrap;gap:8px 14px;color:var(--text-soft);font-size:12px}.card-actions{display:flex;gap:8px;margin-top:4px}.empty-state{background:var(--bg-elevated);border:1px dashed var(--border-strong);border-radius:var(--radius);padding:48px 24px;text-align:center}.empty-state h2{font-size:20px;margin-bottom:8px}.empty-state p{color:var(--text-muted);margin-bottom:20px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.mode-card{position:relative;background:var(--bg-elevated);border:1px solid var(--border);border-radius:18px;padding:28px;box-shadow:var(--shadow);overflow:hidden;min-height:220px;display:flex;flex-direction:column;gap:12px;transition:transform .15s,border-color .15s}.mode-card:hover{transform:translateY(-3px);border-color:#c4b5fd}.mode-card.ai{background:linear-gradient(145deg,rgba(13,148,136,.08),transparent 50%),var(--bg-elevated)}.mode-card.manual{background:linear-gradient(145deg,rgba(106,57,245,.08),transparent 50%),var(--bg-elevated)}.mode-card h2{font-size:22px}.mode-card p{color:var(--text-muted);line-height:1.5;flex:1}.panel{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-grid .full{grid-column:1 / -1}.field{display:flex;flex-direction:column;gap:8px}.field label{font-size:13px;font-weight:600;color:var(--text)}.field .hint,.hint{font-size:12px;color:var(--text-soft);font-weight:400}.field input,.field textarea,.field select{border:1px solid var(--border);border-radius:var(--radius-sm);padding:11px 12px;background:#fff;color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-glow)}.field textarea{min-height:100px;resize:vertical}.rich-text-editor{border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;overflow:hidden;transition:border-color .15s,box-shadow .15s}.rich-text-editor:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-glow)}.rich-text-editor .ck.ck-editor{width:100%}.rich-text-editor .ck.ck-toolbar{border:none!important;border-bottom:1px solid var(--border)!important;background:var(--bg-soft)!important;border-radius:0!important}.rich-text-editor .ck.ck-editor__main>.ck-editor__editable{border:none!important;box-shadow:none!important;min-height:var(--rte-min-height, 220px);font-size:14px;line-height:1.6;color:var(--text)}.rich-text-editor .ck.ck-editor__main>.ck-editor__editable.ck-focused{border:none!important;box-shadow:none!important}.rich-text-editor .ck-content h1,.rich-text-editor .ck-content h2,.rich-text-editor .ck-content h3,.rich-text-editor .ck-content h4{font-family:var(--font-display);line-height:1.3}.rich-text-editor .ck-content img{max-width:100%;height:auto}.checkbox-row{display:flex;align-items:center;gap:10px;font-size:14px}.checkbox-row input{width:16px;height:16px;accent-color:var(--brand)}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:#fff;cursor:pointer;font-size:13px;font-weight:500}.chip.active{background:var(--brand-soft);border-color:#c4b5fd;color:var(--brand-dark)}.alert{padding:12px 14px;border-radius:12px;font-size:14px;line-height:1.45}.alert-error{background:var(--danger-soft);color:var(--danger)}.alert-info{background:var(--brand-soft);color:var(--brand-dark)}.alert-success{background:var(--success-soft);color:var(--success)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px;background:#0f172a73;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal-dialog{width:min(100%,420px);padding:22px 22px 18px;border-radius:var(--radius);background:var(--bg-elevated);box-shadow:var(--shadow);border:1px solid var(--border)}.modal-title{margin:0 0 10px;font-family:var(--font-display);font-size:18px;font-weight:600;line-height:1.3}.modal-body{margin:0 0 20px;color:var(--text-muted);font-size:14px;line-height:1.5}.modal-body p{margin:0}.modal-body strong{color:var(--text);font-weight:600}.modal-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.loading-box{display:flex;flex-direction:column;align-items:center;gap:14px;padding:40px 20px;text-align:center}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.editor-layout{display:grid;grid-template-columns:300px 1fr;gap:18px;align-items:start}.tree-panel,.editor-panel{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.tree-panel{padding:16px;position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto}.editor-panel{padding:24px}.tree-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--text-soft);margin-bottom:12px}.tree-item{width:100%;text-align:left;border:none;background:transparent;padding:8px 10px;border-radius:8px;cursor:pointer;color:var(--text);font-size:13px}.tree-item:hover{background:var(--bg-soft)}.tree-item.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}.tree-item.chapter{font-weight:700;margin-top:8px}.tree-item.subject{padding-left:18px}.tree-item.subtopic{padding-left:32px;color:var(--text-muted)}.tree-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.section-title h2{font-size:20px}.list-block{display:flex;flex-direction:column;gap:12px}.nested-card{border:1px solid var(--border);border-radius:12px;padding:14px;background:var(--bg-soft)}.answer-row{display:grid;grid-template-columns:1fr auto auto;gap:8px;align-items:center}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:6px}.status-dot.ok{background:var(--success)}.status-dot.bad{background:var(--danger)}.preview-html{border:1px solid var(--border);border-radius:12px;padding:16px;background:#fff;line-height:1.6;font-size:14px;max-height:280px;overflow:auto}.tabs{display:flex;gap:6px;margin-bottom:18px;background:var(--bg-soft);padding:4px;border-radius:12px;width:fit-content}.tab{border:none;background:transparent;padding:8px 14px;border-radius:10px;cursor:pointer;font-weight:600;font-size:13px;color:var(--text-muted)}.tab.active{background:#fff;color:var(--text);box-shadow:var(--shadow)}.req{color:var(--danger)}.user-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 20px}.user-form-grid .full{grid-column:1 / -1}.toggle-field{justify-content:center}.toggle-disabled .toggle{opacity:.55;cursor:not-allowed}.avatar-preview{display:flex;align-items:center;gap:12px}.avatar-preview img{width:56px;height:56px;border-radius:12px;object-fit:cover;border:1px solid var(--border)}.user-notes{min-height:120px}.notes-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}.note-item{padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:var(--bg-soft)}.note-item p{margin:8px 0 0;white-space:pre-wrap}.note-meta{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--text-muted);font-weight:600}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.toggle-label{font-size:13px;font-weight:600}.toggle{width:46px;height:26px;border-radius:999px;border:none;background:#cbd5e1;padding:3px;cursor:pointer;transition:background .15s;flex-shrink:0}.toggle.on{background:var(--ai)}.toggle-knob{display:block;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0f172a40;transition:transform .15s}.toggle.on .toggle-knob{transform:translate(20px)}.avatar-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.avatar-pick{cursor:pointer}.avatar-preview{width:48px;height:48px;border-radius:10px;object-fit:cover;border:1px solid var(--border)}.users-filters{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:14px}.table-wrap{overflow:auto}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap;vertical-align:middle}.data-table th{font-size:12px;font-weight:700;color:var(--text-muted);background:var(--bg-soft);position:sticky;top:0}.data-table tbody tr:hover{background:#6a39f508}.data-table-row-clickable{cursor:pointer}.data-table-row-clickable:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.table-actions{display:flex;gap:6px}.form-footer{display:flex;justify-content:flex-end;align-items:center;gap:10px;margin-top:18px}.table-footer{padding:12px 14px;color:var(--text-muted);font-size:13px;border-top:1px solid var(--border)}.status-pill{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--bg-soft);color:var(--text-muted)}.status-pill.status-active{background:var(--success-soft);color:var(--success)}.status-pill.status-confirmation{background:var(--warning-soft);color:var(--warning)}.status-pill.status-partially_blocked{background:#ffedd5;color:#c2410c}.status-pill.status-blocked{background:var(--danger-soft);color:var(--danger)}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;margin:0}.detail-row{display:grid;grid-template-columns:220px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.detail-row dt{color:var(--text-muted);font-size:13px;font-weight:600}.detail-row dd{margin:0;font-size:14px;word-break:break-word}@media(max-width:980px){.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto;flex-direction:row;flex-wrap:wrap;align-items:center;gap:12px}.nav{flex-direction:row;flex-wrap:wrap;width:100%}.sidebar-footer{display:none}.grid-stats,.mode-grid,.form-grid,.editor-layout,.user-form-grid,.users-filters,.detail-grid,.structure-chapter-fields{grid-template-columns:1fr}.detail-row{grid-template-columns:1fr;gap:4px}.tree-panel{position:static;max-height:none}.page-header{flex-direction:column}.main{padding:20px 16px 40px}}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px 16px;position:relative;overflow:hidden;isolation:isolate;background-color:#d7e4ff;background-image:radial-gradient(ellipse 90% 80% at 12% 18%,#d8c8ff 0%,transparent 58%),radial-gradient(ellipse 80% 90% at 88% 12%,#c4f3ea 0%,transparent 56%),radial-gradient(ellipse 90% 80% at 82% 86%,#c9d6ff 0%,transparent 58%),radial-gradient(ellipse 80% 80% at 14% 88%,#e4d4ff 0%,transparent 54%),linear-gradient(125deg,#cbb6ff,#c5c2fe,#b9cffd,#bbe8f6,#c4f4e8 64%,#d3c8ff,#e2e8ff);background-size:140% 140%,150% 150%,140% 140%,150% 150%,280% 280%;background-position:20% 30%,80% 20%,70% 80%,15% 75%,0% 50%;animation:loginGradientMove 32s ease-in-out infinite}.login-page:before,.login-page:after{content:"";position:absolute;border-radius:50%;filter:blur(120px);pointer-events:none;z-index:-1}.login-page:before{width:min(80vw,680px);height:min(80vw,680px);top:-22%;left:-16%;background:radial-gradient(circle,rgba(167,139,250,.34),transparent 70%);animation:loginBlobA 26s ease-in-out infinite}.login-page:after{width:min(75vw,640px);height:min(75vw,640px);right:-20%;bottom:-26%;background:radial-gradient(circle,rgba(94,234,212,.26),transparent 70%);animation:loginBlobB 30s ease-in-out infinite}@keyframes loginGradientMove{0%{background-position:18% 28%,82% 18%,72% 82%,14% 76%,0% 45%}25%{background-position:42% 12%,64% 38%,88% 62%,28% 88%,40% 20%}50%{background-position:72% 36%,28% 22%,18% 78%,82% 58%,100% 55%}75%{background-position:38% 68%,88% 48%,52% 18%,8% 32%,55% 80%}to{background-position:18% 28%,82% 18%,72% 82%,14% 76%,0% 45%}}@keyframes loginBlobA{0%,to{transform:translate(0) scale(1)}33%{transform:translate(10%,14%) scale(1.08)}66%{transform:translate(4%,22%) scale(1.14)}}@keyframes loginBlobB{0%,to{transform:translate(0) scale(1)}33%{transform:translate(-12%,-8%) scale(1.1)}66%{transform:translate(-6%,-16%) scale(1.16)}}.login-panel{width:min(420px,100%);display:flex;flex-direction:column;gap:20px;position:relative;z-index:1;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.login-brand{display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px}.login-brand img{width:120px;object-fit:contain}.login-title{font-size:20px;line-height:1.25;color:var(--text);text-align:center}@media(prefers-reduced-motion:reduce){.login-page,.login-page:before,.login-page:after{animation:none}}.login-lead{color:var(--text-muted);font-size:14px;line-height:1.5;margin-top:-6px}.login-form{display:flex;flex-direction:column;gap:14px}.field-floating{position:relative;gap:0}.field-floating input{padding:20px 12px 8px}.field-floating label{position:absolute;left:12px;top:50%;transform:translateY(-50%);margin:0;pointer-events:none;font-size:14px;font-weight:500;color:var(--text-muted);transition:top .18s ease,transform .18s ease,font-size .18s ease,color .18s ease}.field-floating input:focus+label,.field-floating input:not(:placeholder-shown)+label{top:7px;transform:translateY(0);font-size:11px;font-weight:600;color:var(--brand)}.field-floating input:not(:focus):not(:placeholder-shown)+label{color:var(--text-soft)}.field-password input{padding-right:44px}.password-toggle{position:absolute;top:50%;right:8px;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;background:none;padding:0;color:var(--text-muted);cursor:pointer;border-radius:8px;transition:color .15s ease,background .15s ease}.password-toggle:hover{color:var(--text-soft);background:var(--surface-muted, rgba(0, 0, 0, .04))}.login-submit{width:100%;margin-top:4px}.auth-boot{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-boot-card{display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--text-muted)}.sidebar-user{display:flex;flex-direction:column;gap:6px}.sidebar-user-name{font-weight:600;color:#f8fafc;font-size:13px}.sidebar-user-email{font-size:12px;color:#f8fafc8c;word-break:break-all}.sidebar-logout{margin-top:8px;width:100%;background:#ffffff14;color:#f8fafc;border-color:#ffffff1f}.sidebar-logout:hover{background:#ffffff24}.course-structure{display:flex;flex-direction:column;gap:16px}.structure-chapter{border:1px solid var(--border);border-radius:12px;padding:14px 16px;background:var(--bg-soft)}.structure-chapter-title{font-weight:700;font-size:15px;margin-bottom:10px;display:flex;flex-wrap:wrap;gap:8px;align-items:baseline}.structure-chapter-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 16px;margin:0 0 12px;padding:10px 12px;border-radius:8px;background:var(--bg);border:1px solid var(--border);font-size:13px}.structure-chapter-fields>div{display:grid;gap:2px}.structure-chapter-fields>div.full{grid-column:1 / -1}.structure-chapter-fields dt{margin:0;color:var(--muted, #6b7280);font-size:12px;font-weight:500}.structure-chapter-fields dd{margin:0;color:var(--text);word-break:break-word}.structure-subject{margin:8px 0 8px 12px;padding-left:12px;border-left:2px solid var(--border)}.structure-subject-title{font-weight:600;font-size:14px;margin-bottom:6px}.structure-lessons{list-style:none;margin:0;padding:0 0 0 8px;display:flex;flex-direction:column;gap:6px}.structure-lessons li{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline;font-size:13px;color:var(--text)}.structure-meta{font-size:12px;font-weight:500;color:var(--text-muted)}.structure-empty{margin:0 0 0 12px;font-size:13px;color:var(--text-muted)}