:root{--bg:#0f1720;--surface:#16212e;--surface-2:#1d2b3a;--border:#27384a;--text:#e6edf3;--muted:#93a4b8;--primary:#3b82f6;--primary-dark:#1d4ed8;--success:#22c55e;--danger:#ef4444;--warn:#f59e0b;--radius:10px;--shadow:0 12px 32px #00000059;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Segoe UI,ui-sans-serif,system-ui,-apple-system,Roboto,Noto Sans Arabic,Dubai,Tahoma,Arial,sans-serif;font-size:14px;line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.app{grid-template-columns:240px 1fr;min-height:100%;display:grid}.sidebar{background:var(--surface);border-inline-end:1px solid var(--border);flex-direction:column;gap:4px;padding:20px 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th{text-align:start;text-transform:uppercase;letter-spacing:.7px;color:var(--muted);border-bottom:1px solid var(--border);background:var(--surface-2);white-space:nowrap;padding:12px 14px;font-size:11px}tbody td{border-bottom:1px solid var(--border);vertical-align:middle;padding:12px 14px}tbody tr:last-child td{border-bottom:none}tbody tr:hover{background:var(--surface-2)}td.actions{text-align:end;white-space:nowrap}.pagination{border-top:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;display:flex}.pagination__info{color:var(--muted);font-size:13px}.pagination__controls{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.pagination__btn{border:1px solid var(--border);background:var(--surface);min-width:34px;height:32px;color:var(--text);font:inherit;cursor:pointer;border-radius:8px;padding:0 10px;font-size:13px}.pagination__btn:hover:not(:disabled){background:var(--surface-2)}.pagination__btn:disabled{opacity:.5;cursor:not-allowed}.pagination__btn.is-active{background:var(--primary);border-color:var(--primary);color:#fff}.pagination__gap{color:var(--muted);padding:0 4px}.toolbar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px;display:flex}.toolbar .input{max-width:280px}.field{flex-direction:column;gap:6px;margin-bottom:14px;display:flex}.field__label{color:var(--muted);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:600}.field__label em{color:var(--danger);font-style:normal}.field__hint{color:var(--muted);font-size:12px}.field__error{color:var(--danger);font-size:12px}.input{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:8px;width:100%;padding:9px 11px;font-family:inherit;font-size:14px}.input:focus{outline:2px solid 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var(--border);justify-content:space-between;align-items:center;padding:16px 18px;display:flex}.modal__header h2{margin:0;font-size:16px}.modal__body{padding:18px}.modal__footer{border-top:1px solid var(--border);justify-content:flex-end;gap:10px;padding:14px 18px;display:flex}.toast-stack{inset-inline-end:18px;z-index:100;flex-direction:column;gap:8px;display:flex;position:fixed;bottom:18px}.toast{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-inline-start-width:3px;border-radius:8px;align-items:center;gap:12px;max-width:380px;padding:11px 14px;display:flex}.toast--success{border-inline-start-color:var(--success)}.toast--error{border-inline-start-color:var(--danger)}.toast button{color:var(--muted);cursor:pointer;background:0 0;border:none;font-size:16px;line-height:1}.error-note{color:#fca5a5;background:#ef44441a;border:1px solid #ef444459;border-radius:8px;align-items:center;gap:12px;margin-bottom:14px;padding:10px 14px;display:flex}.empty{text-align:center;color:var(--muted);padding:44px 20px}.empty__title{color:var(--text);margin:0 0 6px;font-weight:600}.empty__hint{margin:0 0 14px}.spinner{justify-content:center;gap:5px;padding:34px;display:flex}.spinner__dot{background:var(--muted);border-radius:50%;width:8px;height:8px;animation:1s ease-in-out infinite bounce}.spinner__dot:nth-child(2){animation-delay:.15s}.spinner__dot:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,80%,to{opacity:.5;transform:scale(.7)}40%{opacity:1;transform:scale(1)}}.login{place-items:center;min-height:100%;padding:24px;display:grid;position:relative}.login__lang{position:absolute;inset-block-start:16px;inset-inline-end:16px}.login__card{background:var(--surface);border:1px solid var(--border);width:100%;max-width:400px;box-shadow:var(--shadow);border-radius:14px;padding:26px}.login__card h1{margin:0 0 4px;font-size:20px}.login__card p{color:var(--muted);margin:0 0 20px}.row-actions{justify-content:flex-end;gap:6px;display:inline-flex}.muted{color:var(--muted)}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.stack{flex-direction:column;gap:12px;display:flex}.inline-list{flex-wrap:wrap;gap:6px;display:flex}.media-list{flex-direction:column;gap:8px;display:flex}.media-item{background:var(--surface-2);border:1px solid var(--border);border-radius:8px;justify-content:space-between;align-items:center;gap:10px;padding:9px 12px;display:flex}@media (width<=860px){.app{grid-template-columns:1fr}.sidebar{border-inline-end:none;border-bottom:1px solid var(--border);flex-flow:wrap}.sidebar__group,.sidebar__footer{display:none}.main{padding:16px}}.chat{grid-template-columns:300px 1fr;align-items:start;gap:16px;display:grid}.chat__sidebar{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.chat__sidebar-head{border-bottom:1px solid var(--border);padding:12px 14px;font-weight:600}.chat__sidebar-empty{padding:12px}.chat__courses{max-height:68vh;overflow-y:auto}.chat__course{text-align:start;border:0;border-bottom:1px solid var(--border);width:100%;color:var(--text);cursor:pointer;background:0 0;border-inline-start:3px solid #0000;gap:10px;padding:10px 12px;display:flex}.chat__course:hover{background:var(--surface-2)}.chat__course.is-active{background:var(--surface-2);border-inline-start-color:var(--primary)}.chat__course-main{flex:1;min-width:0}.chat__course-name{font-weight:600}.chat__course-preview{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:12px;overflow:hidden}.chat__unread{background:var(--primary);color:#fff;border-radius:999px;align-self:center;padding:1px 8px;font-size:11px}.chat__main{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;min-height:60vh;max-height:calc(100vh - 170px);display:flex;overflow:hidden}.chat__head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:8px;padding:12px 14px;display:flex}.chat__messages{flex-direction:column;flex:1;gap:10px;padding:14px;display:flex;overflow-y:auto}.chat__more{justify-content:center;padding-bottom:4px;display:flex}.chat__msg{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;align-self:flex-start;max-width:78%;padding:8px 10px}.chat__msg.is-own{background:#3b82f629;border-color:#3b82f673;align-self:flex-end}.chat__msg-head{color:var(--muted);align-items:baseline;gap:8px;margin-bottom:3px;font-size:11px;display:flex}.chat__msg-actions{margin-inline-start:auto}.chat__msg-body{white-space:pre-wrap;word-break:break-word}.chat__msg img{border-radius:8px;max-width:100%;margin-top:6px;display:block}.chat__msg-file{color:var(--primary);margin-top:6px;text-decoration:none;display:inline-block}.chat__composer{border-top:1px solid var(--border);align-items:center;gap:8px;padding:10px 12px;display:flex}.chat__composer textarea{resize:none;flex:1;min-height:40px;max-height:120px}.chat__attach{cursor:pointer}.chat__attach input{display:none}.chat__file-name{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;max-width:140px;font-size:12px;overflow:hidden}@media (width<=860px){.chat{grid-template-columns:1fr}.chat__courses{max-height:220px}.chat__main{max-height:none}}