:root{--c-bg: #f5f6fa;--c-surface: #ffffff;--c-surface-2: #f8f9fc;--c-border: #e3e6ee;--c-border-strong: #cbd2e0;--c-text: #1a1d29;--c-text-muted: #6b7280;--c-text-faint: #9aa1b1;--c-primary: #6366f1;--c-primary-hover: #4f51e0;--c-primary-soft: #eef0ff;--c-danger: #e1395a;--c-danger-soft: #fdebef;--c-success: #18a058;--c-success-soft: #e7f6ee;--c-warning: #d98e04;--c-warning-soft: #fcf3e0;--c-info: #2f80ed;--c-info-soft: #e8f1fd;--radius: 12px;--radius-sm: 8px;--radius-lg: 18px;--shadow-sm: 0 1px 2px rgba(20, 24, 40, .06);--shadow: 0 4px 16px rgba(20, 24, 40, .08);--shadow-lg: 0 12px 40px rgba(20, 24, 40, .16);--sidebar-w: 248px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font);background:var(--c-bg);color:var(--c-text);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--c-primary);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{margin:0 0 .4em;line-height:1.25;font-weight:650}h1{font-size:1.6rem}h2{font-size:1.25rem}h3{font-size:1.05rem}p{margin:0 0 .8em}.shell{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--c-surface);border-right:1px solid var(--c-border);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:20px 20px 14px;font-weight:750;font-size:1.1rem}.sidebar-brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--c-primary),#8b5cf6);display:grid;place-items:center;color:#fff;font-size:1.1rem}.sidebar-nav{padding:8px;display:flex;flex-direction:column;gap:2px;flex:1}.nav-section{margin-top:14px;padding:6px 12px 4px;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--c-text-faint);font-weight:700}.nav-link{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:var(--radius-sm);color:var(--c-text);font-weight:500;white-space:nowrap}.nav-link:hover{background:var(--c-surface-2);text-decoration:none}.nav-link.active{background:var(--c-primary-soft);color:var(--c-primary);font-weight:650}.nav-link .ico{width:20px;text-align:center;font-size:1.05rem}.nav-link .nav-count{margin-left:auto;background:var(--c-danger);color:#fff;font-size:.7rem;font-weight:700;padding:1px 7px;border-radius:99px}.sidebar-footer{border-top:1px solid var(--c-border);padding:12px}.main{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{height:60px;background:var(--c-surface);border-bottom:1px solid var(--c-border);display:flex;align-items:center;gap:12px;padding:0 20px;position:sticky;top:0;z-index:30}.topbar .spacer{flex:1}.hamburger{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--c-text)}.page{padding:26px;max-width:1180px;width:100%;margin:0 auto}.page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:20px;flex-wrap:wrap}.page-header .subtitle{color:var(--c-text-muted);margin:0}.card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.card-pad{padding:20px}.card-head{padding:16px 20px;border-bottom:1px solid var(--c-border);display:flex;align-items:center;justify-content:space-between;gap:12px}.card-head h3{margin:0}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-auto{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.stack{display:flex;flex-direction:column;gap:14px}.row{display:flex;align-items:center;gap:10px}.row-wrap{flex-wrap:wrap}.between{justify-content:space-between}.muted{color:var(--c-text-muted)}.faint{color:var(--c-text-faint);font-size:.85rem}.right{margin-left:auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid transparent;border-radius:var(--radius-sm);padding:9px 16px;font-size:.92rem;font-weight:600;font-family:inherit;cursor:pointer;transition:background .12s,border-color .12s,opacity .12s;white-space:nowrap;line-height:1.1}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--c-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--c-primary-hover)}.btn-secondary{background:var(--c-surface);border-color:var(--c-border-strong);color:var(--c-text)}.btn-secondary:hover:not(:disabled){background:var(--c-surface-2)}.btn-ghost{background:transparent;color:var(--c-text)}.btn-ghost:hover:not(:disabled){background:var(--c-surface-2)}.btn-danger{background:var(--c-danger);color:#fff}.btn-danger:hover:not(:disabled){background:#c92c4d}.btn-danger-soft{background:var(--c-danger-soft);color:var(--c-danger)}.btn-success{background:var(--c-success);color:#fff}.btn-sm{padding:6px 11px;font-size:.82rem}.btn-block{width:100%}.btn-icon{padding:7px 9px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field>label{font-weight:600;font-size:.88rem}.field .hint{font-size:.8rem;color:var(--c-text-faint)}.field .err{font-size:.82rem;color:var(--c-danger)}.input,.textarea,.select{width:100%;padding:9px 12px;border:1px solid var(--c-border-strong);border-radius:var(--radius-sm);font-family:inherit;font-size:.92rem;background:var(--c-surface);color:var(--c-text);transition:border-color .12s,box-shadow .12s}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-soft)}.textarea{resize:vertical;min-height:90px}.input-row{display:flex;gap:10px}.badge{display:inline-flex;align-items:center;gap:5px;padding:2px 9px;border-radius:99px;font-size:.75rem;font-weight:650;line-height:1.5;white-space:nowrap}.badge-gray{background:var(--c-surface-2);color:var(--c-text-muted);border:1px solid var(--c-border)}.badge-primary{background:var(--c-primary-soft);color:var(--c-primary)}.badge-success{background:var(--c-success-soft);color:var(--c-success)}.badge-danger{background:var(--c-danger-soft);color:var(--c-danger)}.badge-warning{background:var(--c-warning-soft);color:var(--c-warning)}.badge-info{background:var(--c-info-soft);color:var(--c-info)}.avatar{border-radius:50%;background:var(--c-primary-soft);color:var(--c-primary);display:inline-grid;place-items:center;font-weight:700;flex-shrink:0;overflow:hidden;object-fit:cover}.avatar img{width:100%;height:100%;object-fit:cover}.table-wrap{overflow-x:auto}table.tbl{width:100%;border-collapse:collapse;font-size:.9rem}table.tbl th{text-align:left;padding:11px 14px;border-bottom:1px solid var(--c-border);color:var(--c-text-muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;white-space:nowrap}table.tbl td{padding:12px 14px;border-bottom:1px solid var(--c-border);vertical-align:middle}table.tbl tbody tr:hover{background:var(--c-surface-2)}table.tbl tr.clickable{cursor:pointer}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--c-border);margin-bottom:18px;overflow-x:auto}.tab{padding:10px 16px;border:none;background:none;font-family:inherit;font-size:.92rem;font-weight:600;color:var(--c-text-muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}.tab:hover{color:var(--c-text)}.tab.active{color:var(--c-primary);border-bottom-color:var(--c-primary)}.stat{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-sm)}.stat .label{color:var(--c-text-muted);font-size:.85rem;font-weight:600}.stat .value{font-size:1.9rem;font-weight:700;margin-top:4px}.stat .sub{font-size:.8rem;color:var(--c-text-faint);margin-top:2px}.alert{padding:12px 14px;border-radius:var(--radius-sm);font-size:.9rem;border:1px solid transparent}.alert-danger{background:var(--c-danger-soft);color:#a01d3b;border-color:#f5c6d0}.alert-info{background:var(--c-info-soft);color:#1c5fb8;border-color:#c5dcf8}.alert-warning{background:var(--c-warning-soft);color:#95630a;border-color:#f0dcae}.alert-success{background:var(--c-success-soft);color:#0f7a42;border-color:#bce6cf}.empty{text-align:center;padding:48px 20px;color:var(--c-text-muted)}.empty .emoji{font-size:2.4rem;display:block;margin-bottom:8px}.center-screen{min-height:100vh;display:grid;place-items:center}.spinner{width:22px;height:22px;border:2.5px solid var(--c-border-strong);border-top-color:var(--c-primary);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}.spinner.lg{width:38px;height:38px;border-width:3.5px}@keyframes spin{to{transform:rotate(360deg)}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#12162673;display:grid;place-items:center;padding:20px;z-index:100}.modal{background:var(--c-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:520px;max-height:90vh;overflow-y:auto}.modal.lg{max-width:760px}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--c-border)}.modal-head h2{margin:0;font-size:1.15rem}.modal-body{padding:22px}.modal-foot{padding:16px 22px;border-top:1px solid var(--c-border);display:flex;justify-content:flex-end;gap:10px}.icon-close{background:none;border:none;font-size:1.3rem;cursor:pointer;color:var(--c-text-muted);line-height:1}.toast-stack{position:fixed;top:18px;right:18px;display:flex;flex-direction:column;gap:10px;z-index:200;max-width:360px}.toast{background:var(--c-surface);border:1px solid var(--c-border);border-left:4px solid var(--c-text-muted);border-radius:var(--radius-sm);box-shadow:var(--shadow);padding:12px 14px;display:flex;gap:10px;align-items:flex-start;animation:slideIn .18s ease}.toast.success{border-left-color:var(--c-success)}.toast.error{border-left-color:var(--c-danger)}.toast.info{border-left-color:var(--c-info)}.toast .msg{flex:1;font-size:.9rem}@keyframes slideIn{0%{transform:translate(20px);opacity:0}to{transform:translate(0);opacity:1}}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#eef0ff,#f5f6fa 55%,#fdf0f4)}.auth-card{width:100%;max-width:420px;background:var(--c-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:32px}.auth-brand{text-align:center;margin-bottom:22px}.auth-brand .logo{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--c-primary),#8b5cf6);display:inline-grid;place-items:center;color:#fff;font-size:1.5rem;margin-bottom:10px}.divider{display:flex;align-items:center;gap:12px;color:var(--c-text-faint);font-size:.82rem;margin:18px 0}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--c-border)}.social-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.social-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:9px;border:1px solid var(--c-border-strong);border-radius:var(--radius-sm);background:var(--c-surface);color:var(--c-text);font-weight:600;font-size:.85rem;cursor:pointer}.social-btn:hover{background:var(--c-surface-2);text-decoration:none}.list-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--c-border)}.list-row:last-child{border-bottom:none}.tag-pill{background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:99px;padding:2px 10px;font-size:.78rem;color:var(--c-text-muted)}.media-player{width:100%;border-radius:var(--radius-sm);overflow:hidden;background:#000}.media-player video{width:100%;display:block;max-height:460px}.media-player audio{width:100%;display:block}.qr-img{width:200px;height:200px;border-radius:var(--radius-sm);border:1px solid var(--c-border)}.code-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem}.code-grid span{background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:6px;padding:6px 10px;text-align:center}.quiz-option{display:flex;align-items:center;gap:10px;padding:12px 14px;border:1px solid var(--c-border-strong);border-radius:var(--radius-sm);cursor:pointer;margin-bottom:8px;transition:border-color .12s,background .12s}.quiz-option:hover{border-color:var(--c-primary)}.quiz-option.selected{border-color:var(--c-primary);background:var(--c-primary-soft)}.quiz-option.correct{border-color:var(--c-success);background:var(--c-success-soft)}.quiz-option.incorrect{border-color:var(--c-danger);background:var(--c-danger-soft)}.progress{height:8px;background:var(--c-surface-2);border-radius:99px;overflow:hidden}.progress>div{height:100%;background:var(--c-primary);transition:width .2s}.ai-meter{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}.backdrop-mobile{display:none}@media (max-width: 980px){.grid-3{grid-template-columns:repeat(2,1fr)}}@media (max-width: 880px){.sidebar{position:fixed;z-index:60;transform:translate(-100%);transition:transform .2s ease;box-shadow:var(--shadow-lg)}.sidebar.open{transform:translate(0)}.hamburger{display:block}.backdrop-mobile.open{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;z-index:55}}@media (max-width: 640px){.grid-2,.grid-3{grid-template-columns:1fr}.page{padding:16px}.social-grid,.code-grid{grid-template-columns:1fr}}