:root{--bg-main: #f8fafc;--bg-card: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--primary: #2563eb;--primary-hover: #1d4ed8;--primary-light: #eff6ff;--success: #10b981;--danger: #ef4444;--danger-hover: #dc2626;--border: #e2e8f0;--radius-lg: 12px;--radius-md: 8px;--radius-sm: 6px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--sidebar-w: 292px;--sidebar-bg: #07111f;--sidebar-bg-soft: #0d1b2e;--sidebar-border: rgba(148, 163, 184, .18);--sidebar-text: #e6edf7;--sidebar-muted: #9fb2ca;--sidebar-subtle: #71839a;--sidebar-hover: rgba(148, 163, 184, .13);--sidebar-active: rgba(56, 189, 248, .16);--sidebar-active-border: #67e8f9;--sidebar-active-text: #ffffff}*{box-sizing:border-box;margin:0;padding:0}body{margin:0;font-family:Outfit,Inter,system-ui,-apple-system,sans-serif;background:var(--bg-main);color:var(--text-main);-webkit-font-smoothing:antialiased}html,body,#root{min-height:100%}h1{font-size:28px;font-weight:700;color:#0f172a;margin-bottom:24px}h2{font-size:18px;font-weight:600;color:#1e293b;margin-bottom:16px}button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:var(--radius-md);background:var(--primary);color:#fff;padding:10px 18px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-sm)}button:hover{background:var(--primary-hover);transform:translateY(-1px)}button:active{transform:translateY(0)}button.secondary{background:#fff;color:var(--text-main);border:1px solid var(--border)}button.secondary:hover{background:#f1f5f9}button.danger{background:var(--danger)}button.danger:hover{background:var(--danger-hover)}button:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.button-link{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:var(--radius-md);background:var(--primary);color:#fff;padding:10px 18px;font-size:14px;font-weight:600;text-decoration:none;box-shadow:var(--shadow-sm)}.button-link.secondary{background:#fff;color:var(--text-main);border:1px solid var(--border)}input[type=text],input[type=number],input[type=password],input[type=email],input:not([type=checkbox]):not([type=radio]):not([type=file]):not([type=submit]):not([type=button]):not([type=reset]):not([type=image]):not([type=range]),select,textarea{width:100%;border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 14px;background:#fff;color:var(--text-main);font-size:14px;transition:border-color .15s ease,box-shadow .15s ease;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb26}textarea{resize:vertical;min-height:80px}.shell{display:flex;height:100vh;min-height:100vh;overflow:hidden;background:var(--bg-main)}.sidebar{width:var(--sidebar-w);height:100vh;max-height:100vh;overflow-y:auto;background:linear-gradient(180deg,#0e1f35f5,#07111f 42%),var(--sidebar-bg);color:var(--sidebar-text);padding:18px 14px 22px;display:flex;flex-direction:column;border-right:1px solid var(--sidebar-border);flex-shrink:0;scrollbar-width:thin;scrollbar-color:rgba(148,163,184,.42) transparent;position:sticky;top:0}.sidebar::-webkit-scrollbar{width:8px}.sidebar::-webkit-scrollbar-thumb{background:#94a3b852;border-radius:999px;border:2px solid transparent;background-clip:content-box}.brand{margin:0 4px 22px;padding:10px 8px 16px;color:var(--sidebar-active-text);display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--sidebar-border)}.brand-mark{width:38px;height:38px;display:grid;place-items:center;flex:0 0 auto;border-radius:12px;background:linear-gradient(135deg,#38bdf8,#2dd4bf);color:#082032;font-size:14px;font-weight:900;letter-spacing:.02em;box-shadow:0 10px 24px #2dd4bf2e}.brand-copy{min-width:0;display:flex;flex-direction:column;gap:2px}.brand-copy strong{font-size:16px;line-height:1.15;font-weight:800;letter-spacing:0}.brand-copy small{color:var(--sidebar-muted);font-size:12px;line-height:1.25;font-weight:600}.sidebar-group{margin:0 0 10px}.sidebar-group+.sidebar-group{padding-top:8px}.sidebar-group-header{width:100%;min-height:40px;padding:8px;border-radius:10px;background:transparent;color:var(--sidebar-muted);border:1px solid transparent;box-shadow:none;display:flex;align-items:center;gap:9px;cursor:pointer;text-align:left;transition:background .16s ease,color .16s ease,border-color .16s ease}.sidebar-group-header:hover{background:#94a3b814;color:#d9e5f2;transform:none}.sidebar-group-header:focus-visible,.nav:focus-visible{outline:2px solid var(--sidebar-active-border);outline-offset:2px}.sidebar-group.has-active .sidebar-group-header{color:#d7e5f4}.sidebar-group-icon,.nav-icon{display:grid;place-items:center;flex:0 0 auto}.sidebar-group-icon{width:26px;height:26px;border-radius:8px;color:#9bd8e8;background:#67e8f917}.sidebar-group-icon svg,.nav-icon svg,.sidebar-chevron svg{width:18px;height:18px}.sidebar-group-title{flex:1;min-width:0;color:inherit;font-size:12.5px;line-height:1.25;font-weight:800;letter-spacing:.015em}.sidebar-chevron{display:grid;place-items:center;width:22px;height:22px;color:var(--sidebar-subtle);transition:transform .16s ease,color .16s ease}.sidebar-group-header[aria-expanded=true] .sidebar-chevron{transform:rotate(90deg);color:#c6d5e6}.sidebar-group-items{display:flex;flex-direction:column;gap:3px;max-height:760px;overflow:hidden;padding:5px 0 2px 10px;border-left:1px solid rgba(148,163,184,.16);margin-left:20px;transition:max-height .22s ease,opacity .16s ease,padding .16s ease;opacity:1}.sidebar-group-items.collapsed{max-height:0;opacity:0;padding-top:0;padding-bottom:0}.nav{display:flex;align-items:center;gap:10px;min-height:42px;color:var(--sidebar-muted);text-decoration:none;padding:9px 10px 9px 12px;border-radius:11px;border:1px solid transparent;position:relative;font-size:14.5px;line-height:1.25;font-weight:650;letter-spacing:0;transition:background .16s ease,color .16s ease,border-color .16s ease,box-shadow .16s ease}.nav:hover{color:#f8fbff;background:var(--sidebar-hover);transform:none}.nav-icon{width:24px;height:24px;color:#8fb6ca}.nav-label{flex:1;min-width:0;white-space:normal}.nav.active{color:var(--sidebar-active-text);background:var(--sidebar-active);border-color:#67e8f947;box-shadow:inset 3px 0 0 var(--sidebar-active-border),0 8px 22px #0891b21f;font-weight:800}.nav.active .nav-icon{color:var(--sidebar-active-border)}.reuse-tag{flex:0 0 auto;border-radius:999px;padding:2px 7px;background:#fbbf2424;color:#fde68a;border:1px solid rgba(251,191,36,.2);font-size:11px;line-height:1.2;font-weight:800}.main{flex:1;min-width:0;height:100vh;overflow:hidden;display:flex;flex-direction:column}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 32px;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm)}.topbar span{font-weight:600;font-size:15px;color:var(--text-muted)}.content{padding:32px;flex:1;overflow-y:auto;min-height:0}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;margin-bottom:28px}.stat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;justify-content:space-between;transition:transform .2s ease,box-shadow .2s ease}.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.stat span{display:block;color:var(--text-muted);font-size:14px;font-weight:500;margin-bottom:8px}.stat strong{font-size:32px;font-weight:700;color:#0f172a}.panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);margin-bottom:24px}.chart{height:320px}.row{padding:12px 0;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.row:last-child{border-bottom:0}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;align-items:start}.field{margin-bottom:16px;display:flex;flex-direction:column;gap:6px}.field label{font-weight:600;font-size:14px;color:#334155}.field .helper{font-size:12px;color:var(--text-muted);margin-top:2px}.field .error-msg{font-size:12px;color:var(--danger);margin-top:2px}.check-row{display:flex;gap:10px;align-items:center;height:42px}.check-row input{width:18px;height:18px;cursor:pointer;accent-color:var(--primary)}.toggle-switch{display:inline-flex;align-items:center;gap:12px;min-height:42px;color:#334155;font-size:14px;font-weight:600;cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-switch input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.toggle-switch__track{position:relative;width:46px;height:26px;flex:0 0 46px;border-radius:999px;background:#cbd5e1;border:1px solid #cbd5e1;box-shadow:inset 0 1px 2px #0f172a1f;transition:background .18s ease,border-color .18s ease,box-shadow .18s ease}.toggle-switch__thumb{position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:999px;background:#fff;box-shadow:0 2px 5px #0f172a3d;transition:transform .18s ease}.toggle-switch input:checked+.toggle-switch__track{background:var(--primary);border-color:var(--primary);box-shadow:inset 0 1px 2px #0f172a1a,0 0 0 3px #2563eb1f}.toggle-switch input:checked+.toggle-switch__track .toggle-switch__thumb{transform:translate(20px)}.toggle-switch input:focus-visible+.toggle-switch__track{outline:3px solid rgba(37,99,235,.22);outline-offset:2px}.toggle-switch:has(input:disabled){opacity:.6;cursor:not-allowed}.toggle-switch__label{line-height:1.35}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0f172a66;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:grid;place-items:center;z-index:1000;padding:20px;overflow:hidden}.modal-content{background:#fff;border-radius:var(--radius-lg);width:min(650px,100%);max-height:calc(100dvh - 40px);display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--shadow-lg);animation:modalEnter .25s cubic-bezier(.16,1,.3,1)}.csv-import-modal{width:min(1120px,96vw)}.modal-content>form{display:flex;flex:1;min-height:0;flex-direction:column;overflow:hidden}@keyframes modalEnter{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.modal-header h2{margin:0}.modal-close{background:transparent;box-shadow:none;color:var(--text-muted);padding:4px;border-radius:50%;font-size:20px;width:32px;height:32px}.modal-close:hover{background:#f1f5f9;color:var(--text-main);transform:none}.modal-body{padding:24px;overflow-y:auto;flex:1;min-height:0}.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:12px;background:#f8fafc;border-bottom-left-radius:var(--radius-lg);border-bottom-right-radius:var(--radius-lg);flex-shrink:0}.csv-import-step{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;margin-bottom:16px;background:#f8fafc}.csv-import-step p,.csv-helper{color:var(--text-muted);font-size:13px;margin-top:6px}.csv-file-input{display:flex;align-items:center;gap:12px;margin-bottom:16px}.csv-file-input input[type=file]{width:auto}.csv-import-summary{display:flex;gap:16px;flex-wrap:wrap;margin:16px 0;color:var(--text-muted)}.csv-preview-wrap{max-height:420px;overflow:auto}.csv-preview-wrap table{min-width:980px}.csv-invalid-row{background:#fef2f2}.csv-error{margin:12px 0;font-weight:600}.csv-warning-box{border:1px solid #f59e0b;background:#fffbeb;color:#92400e;border-radius:var(--radius-md);padding:12px;font-size:13px;margin-bottom:16px}.csv-result-success,.csv-result-error{border-radius:var(--radius-md);padding:12px;margin-top:16px;font-weight:600}.csv-result-success{background:#ecfdf5;color:#047857}.csv-result-error{background:#fef2f2;color:#b91c1c}.drawer-container{display:flex;gap:24px;align-items:start;min-height:0}.drawer-main{flex:1;min-width:0}.drawer-aside{width:320px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);position:sticky;top:0}.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.table-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:12px 14px;margin:0 0 12px}.table-controls-left,.table-controls-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.table-controls span,.table-controls label{color:var(--text-muted);font-size:13px;font-weight:600}.table-controls label{display:flex;align-items:center;gap:8px}.table-controls select{width:auto;min-width:132px;padding:8px 10px}.table-controls button{padding:8px 12px}.icon-button{width:34px;height:34px;padding:0;display:inline-grid;place-items:center;line-height:1}.icon-button svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}table{width:100%;border-collapse:collapse;font-size:14px;text-align:left}th,td{padding:14px 18px;border-bottom:1px solid var(--border);vertical-align:middle}th{background:#f8fafc;color:var(--text-muted);font-weight:600;text-transform:uppercase;font-size:12px;letter-spacing:.5px}tr:hover td{background:#f8fafc}.badge{display:inline-flex;align-items:center;padding:4px 8px;border-radius:9999px;font-size:12px;font-weight:600;text-transform:capitalize}.badge.active{background:#ecfdf5;color:#065f46}.badge.inactive{background:#f1f5f9;color:#475569}.badge.blue{background:#eff6ff;color:#1e40af}.actions{display:flex;gap:6px;flex-wrap:wrap}.actions button{padding:6px 12px;font-size:12px}.media-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-top:16px}.media-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}.media-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.media-preview-container{aspect-ratio:1 / 1;background:#f8fafc;display:grid;place-items:center;overflow:hidden;position:relative;border-bottom:1px solid var(--border);padding:12px;box-sizing:border-box}.media-preview-container img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}.media-video-player,.media-video-embed{width:100%;height:100%;min-height:140px;border:0;background:#0f172a}.media-video-player{object-fit:contain}.media-external-preview{width:100%;height:100%;min-height:140px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:12px;text-align:center}.media-external-preview img{width:100%;max-height:76px;object-fit:cover;border-radius:var(--radius-sm)}.media-external-preview a{color:var(--primary);font-size:13px;font-weight:700;text-decoration:none}.media-preview-button{padding:6px 10px;font-size:12px}.media-external-preview small{color:var(--text-muted);font-size:11px;line-height:1.35}.media-external-icon{font-size:34px}.media-review-modal{width:min(520px,95vw)}.media-review-body{display:flex;justify-content:center;background:#0f172a;padding:16px}.media-review-frame{width:min(420px,100%);height:min(72dvh,720px);border:0;border-radius:var(--radius-md);background:#111827}.media-review-video{width:100%;max-height:72dvh;border-radius:var(--radius-md);background:#111827}.media-review-unavailable{width:100%;min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#fff;text-align:center}.media-review-unavailable img{width:min(260px,100%);max-height:180px;object-fit:cover;border-radius:var(--radius-md)}.media-review-unavailable small{color:#cbd5e1;font-size:12px;line-height:1.45}.media-review-unavailable a{color:#93c5fd;font-weight:700}.media-review-unavailable a.button-link{color:#fff}.media-info{padding:12px;flex:1;display:flex;flex-direction:column;justify-content:space-between;gap:8px}.media-title{font-weight:600;font-size:13px;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.media-meta{font-size:11px;color:var(--text-muted);display:flex;justify-content:space-between}.media-card.selectable{cursor:pointer;border:2px solid transparent}.media-card.selectable:hover{border-color:#93c5fd}.media-card.selected{border-color:var(--primary);background:var(--primary-light)}.qr-preview-box{display:flex;flex-direction:column;align-items:center;gap:16px;background:#f8fafc;padding:24px;border-radius:var(--radius-md);border:1px dashed var(--border);margin-top:12px}.qr-detail-box{display:inline-flex;flex-direction:column;align-items:center;gap:14px;background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius-md);padding:20px}.qr-detail-box img{width:256px;height:256px;max-width:100%}.qr-detail-box code{background:#fff;border:1px solid var(--border);border-radius:6px;padding:6px 10px;font-size:13px;font-weight:700}.date-input-wrap{display:flex;align-items:center;gap:8px;background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius-md);padding:8px 10px}.date-input-wrap:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px #6366f11f}.date-input-wrap input[type=date]{flex:1;min-width:0;border:0;background:transparent;padding:0;box-shadow:none}.date-input-wrap button{flex-shrink:0;padding:7px 10px}.field-help{color:var(--text-muted);font-size:12px;margin-top:6px}.flashcard-preview-wrap{perspective:1000px;width:100%;max-width:320px;height:200px;margin:16px auto;cursor:pointer}.flashcard-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s;transform-style:preserve-3d}.flashcard-preview-wrap.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px;border-radius:var(--radius-lg);border:2px solid var(--border);background:#fff;box-shadow:var(--shadow-md)}.flashcard-back{background:#eff6ff;color:var(--primary);transform:rotateY(180deg);border-color:#bfdbfe}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eff6ff,#dbeafe);padding:20px}.login-card{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:40px;width:100%;max-width:440px;display:flex;flex-direction:column;gap:20px}.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:16px;flex-wrap:wrap}.search-input{max-width:300px}.toast{position:fixed;bottom:24px;right:24px;background:#1e293b;color:#fff;padding:12px 24px;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:8px;font-size:14px;font-weight:500;z-index:2000;animation:toastEnter .2s cubic-bezier(.16,1,.3,1)}@keyframes toastEnter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.shell{flex-direction:column}.sidebar{width:100%}.drawer-container{flex-direction:column}.drawer-aside{width:100%;position:static}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.badge.draft{background:#fef3c7;color:#92400e}.badge.published{background:#d1fae5;color:#065f46}.badge.archived{background:#f1f5f9;color:#64748b}.badge.premium{background:#fef3c7;color:#b45309}.badge.free{background:#ecfdf5;color:#047857}.badge.green{background:#d1fae5;color:#065f46}.badge.yellow{background:#fef3c7;color:#92400e}.badge.purple{background:#f3e8ff;color:#7c3aed}.badge.orange{background:#ffedd5;color:#c2410c}.badge.info{background:#e0f2fe;color:#0369a1}.ms-wrap{min-height:42px;border:1px solid var(--border);border-radius:var(--radius-md);padding:6px 10px;background:#fff;cursor:pointer;display:flex;align-items:center;flex-wrap:wrap;gap:4px;transition:border-color .15s ease}.ms-wrap:hover{border-color:#94a3b8}.ms-placeholder{color:var(--text-muted);font-size:14px}.ms-chips{display:flex;flex-wrap:wrap;gap:4px}.ms-chip{display:inline-flex;align-items:center;gap:4px;background:var(--primary-light);color:var(--primary);padding:3px 8px;border-radius:6px;font-size:12px;font-weight:600}.ms-chip-x{background:none!important;border:none!important;box-shadow:none!important;color:var(--primary)!important;padding:0!important;font-size:14px;cursor:pointer;line-height:1;transform:none!important}.ms-chip-x:hover{color:var(--danger)!important;background:none!important;transform:none!important}.ms-dropdown{position:absolute;left:0;right:0;top:100%;z-index:50;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);margin-top:4px}.field{position:relative}.ms-search{border:none!important;border-bottom:1px solid var(--border)!important;border-radius:0!important;box-shadow:none!important;padding:8px 12px!important;font-size:13px!important}.ms-options{max-height:200px;overflow-y:auto}.ms-option{padding:8px 12px;font-size:13px;cursor:pointer;transition:background .1s}.ms-option:hover{background:var(--primary-light);color:var(--primary)}.ms-empty{padding:12px;text-align:center;color:var(--text-muted);font-size:13px}.tab-nav{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:24px}.tab-btn{background:none;border:none;box-shadow:none;padding:10px 20px;font-size:14px;font-weight:600;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .15s ease;border-radius:0}.tab-btn:hover{color:var(--primary);background:none;transform:none}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.path-item-card{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:8px;transition:box-shadow .15s ease}.path-item-card:hover{box-shadow:var(--shadow-md)}.path-item-card[draggable=true]{cursor:grab}.path-item-card.dragging{opacity:.55;border-style:dashed;box-shadow:var(--shadow-md)}.path-item-seq{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700;flex-shrink:0}.path-item-info{flex:1;min-width:0}.path-item-info strong{display:block;font-size:14px;margin-bottom:2px}.path-item-info small{color:var(--text-muted);font-size:12px}.path-item-actions{display:flex;gap:4px;flex-shrink:0}.path-item-actions button{padding:4px 8px;font-size:11px}.activity-preview{max-width:320px;margin:0 auto;background:#f8fafc;border-radius:20px;border:2px solid var(--border);padding:20px;min-height:200px}.activity-preview-header{text-align:center;font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-weight:600;margin-bottom:12px}.activity-preview-prompt{text-align:center;font-size:16px;font-weight:600;color:var(--text-main);margin-bottom:16px;line-height:1.4}.activity-preview-options{display:flex;flex-direction:column;gap:8px}.activity-preview-option{padding:10px 14px;background:#fff;border:1.5px solid var(--border);border-radius:var(--radius-md);font-size:14px;text-align:center;cursor:default}.activity-preview-option.correct{border-color:var(--success);background:#ecfdf5;color:#065f46;font-weight:600}.activity-preview-media{display:block;width:100%;max-height:120px;object-fit:contain;border-radius:var(--radius-md);background:#fff;border:1px solid var(--border);margin:0 0 12px}.activity-preview-audio{display:block;width:100%;height:32px;margin:0 0 12px}.library-picker-modal{width:min(980px,96vw)}.library-picker-toolbar{display:grid;grid-template-columns:minmax(160px,auto) minmax(260px,1fr);gap:12px;align-items:center;margin-bottom:16px}.library-picker-list{display:flex;flex-direction:column;gap:10px}.library-picker-item{display:flex;gap:14px;align-items:flex-start;justify-content:space-between;border:1px solid var(--border);border-radius:var(--radius-md);background:#fff;padding:14px}.library-picker-item-main{min-width:0;flex:1}.library-picker-item-main strong,.library-picker-item-main small,.library-picker-item-main p{display:block}.library-picker-item-main strong{font-size:14px;color:var(--text-main);margin-bottom:4px}.library-picker-item-main small{color:var(--text-muted);font-size:12px}.library-picker-item-main p{color:var(--text-muted);font-size:13px;line-height:1.45;margin:8px 0 0}.library-picker-item>button{flex:0 0 auto;margin-top:4px}.library-detail-card{min-width:0}.library-detail-grid{display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:8px 12px}.library-detail-row{min-width:0;border:1px solid #edf2f7;border-radius:var(--radius-sm);background:#f8fafc;padding:8px 10px}.library-detail-label{display:block;color:var(--text-muted);font-size:11px;font-weight:800;text-transform:uppercase;margin-bottom:4px}.library-detail-value{color:var(--text-main);font-size:13px;line-height:1.4;overflow-wrap:anywhere}.muted-value{color:var(--text-muted)}.library-media-value{display:flex;align-items:center;gap:10px;min-width:0}.library-thumb{width:52px;height:52px;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--border);background:#fff}.library-audio{width:min(100%,260px);height:30px}.library-edit-context{border:1px solid #bfdbfe;border-radius:var(--radius-md);background:#eff6ff;padding:12px}.library-edit-context-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}.library-source-fallback{display:flex;flex-wrap:wrap;gap:8px;color:var(--text-muted);font-size:13px}.library-locked-type{display:flex;justify-content:space-between;gap:12px;align-items:center;border:1px solid var(--border);border-radius:var(--radius-md);background:#f8fafc;padding:10px 12px}.library-locked-type span{color:var(--text-muted);font-size:12px;font-weight:800;text-transform:uppercase}.library-locked-type strong{color:var(--text-main);font-size:14px}.activity-form-section{border-top:1px solid var(--border);padding-top:12px}.library-option-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.library-option-list span{border:1px solid var(--border);border-radius:999px;color:var(--text-muted);background:#f8fafc;padding:4px 8px;font-size:12px;font-weight:600}.library-option-list span.correct{border-color:#86efac;color:#166534;background:#ecfdf5}@media(max-width:768px){.library-picker-toolbar,.library-picker-item{display:flex;flex-direction:column;align-items:stretch}.library-detail-grid{grid-template-columns:1fr}}.collapsible-header{display:flex;align-items:center;justify-content:space-between;padding:12px 0;cursor:pointer;border-top:1px solid var(--border);margin-top:16px}.collapsible-header h3{margin:0;font-size:14px;color:var(--text-muted)}.collapsible-body{padding-bottom:8px}.validation-warnings{background:#fffbeb;border:1px solid #f59e0b;border-radius:var(--radius-md);padding:12px;margin-bottom:16px}.validation-warnings p{font-size:13px;font-weight:600;color:#92400e;margin-bottom:6px}.validation-warnings ul{margin:0;padding-left:20px}.validation-warnings li{font-size:12px;color:#92400e;margin-bottom:2px}.feedback-group{display:grid;grid-template-columns:1fr 1fr;gap:12px}.feedback-group .field{margin-bottom:0}.available-lesson-card{transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.available-lesson-card:hover{transform:translateY(-1px);box-shadow:var(--shadow-md);border-color:var(--primary)}