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.sr-root{--white:#eff0f6;--purple:#d9abf3;--citrus:#cff94f;--black:#292b2d;--blue:#4058c8;--salmon:#ee5e37;--ink:#16171a;--line:#d7d8e0;--muted:#9a9ca8;--paper:#fff;--brand-lav:#c1c7ec;--brand-blue:#6f83af;--brand-gold:#e3b25a;--brand-gray:#8a90a6;--brand-gray-soft:#eef0f5;--sr-font:"SF Pro Display",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-family:var(--sr-font);color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased;line-height:1.4}.sr-root *{box-sizing:border-box}.sr-app{background:var(--paper);flex-direction:column;width:clamp(460px,50vw,900px);min-height:100dvh;margin:0 auto;display:flex;position:relative;overflow-x:clip;box-shadow:0 0 60px -30px #14172859}@media (max-width:768px){.sr-app{width:100%}}.sr-app-wide{width:clamp(460px,94vw,1180px)}@media (max-width:768px){.sr-app-wide{width:100%}}.sr-app-body{flex-direction:column;flex:1;min-height:0;padding:0 18px;display:flex}.sr-shell{flex-direction:column;flex:1;min-height:0;display:flex}.sr-main{flex-direction:column;flex:1;min-width:0;min-height:0;display:flex}.sr-app-col{flex-direction:column;flex:1;min-width:0;display:flex}.sr-rail{display:none}.sr-webbar-logo{display:flex}.sr-webbar-avatar{display:none}.sr-sidemenu{flex-direction:column;gap:4px;display:flex}.sr-sidemenu a{color:var(--brand-gray);border-radius:10px;align-items:center;gap:11px;min-height:44px;padding:11px 12px;font-size:14px;font-weight:600;text-decoration:none;transition:background .15s,color .15s;display:flex}.sr-sidemenu a:hover,.sr-sidemenu a.on{background:var(--brand-gray-soft);color:#0f1b3d}.sr-sidemenu svg{flex:none;width:21px;height:21px}@media (min-width:1024px){.sr-app,.sr-app-wide{width:100%;max-width:1680px;box-shadow:none;margin:0 auto;overflow-x:visible}.sr-shell{flex-direction:row;align-items:stretch}.sr-rail{border-right:1px solid var(--brand-gray-soft);background:#fff;flex-direction:column;flex:0 0 248px;gap:6px;width:248px;height:100dvh;padding:18px 14px 16px;display:flex;position:sticky;top:0;overflow-y:auto}.sr-rail-logo{border-bottom:1px solid var(--brand-gray-soft);margin-bottom:6px;padding:2px 8px 14px;display:block}.sr-rail-foot{border-top:1px solid var(--brand-gray-soft);color:var(--brand-gray);border-radius:10px;align-items:center;gap:10px;min-height:44px;margin-top:auto;padding:11px 12px;font-size:14px;font-weight:600;text-decoration:none;display:flex}.sr-rail-foot:hover{background:var(--brand-gray-soft);color:#0f1b3d}.sr-main{background:var(--paper);border-left:none}.sr-webbar{z-index:20;background:var(--paper);border-bottom:1px solid var(--brand-gray-soft);justify-content:flex-end;padding:12px 28px;position:sticky;top:0}.sr-webbar-logo{display:none}.sr-webbar-avatar{display:inline-flex}.sr-app-col{align-items:stretch}.sr-app-body{align-self:center;width:100%;max-width:1240px;padding:0 28px}}.sr-webbar{justify-content:space-between;align-items:center;padding:14px 18px 10px;display:flex}.sr-lm{align-items:flex-end;gap:3px;height:18px;display:flex}.sr-lm span{border-radius:2px;width:3px;display:block}.sr-nm{letter-spacing:-.02em;font-size:16px;font-weight:700}.sr-nm .snd{color:var(--blue)}.sr-avatar{background:var(--purple);cursor:pointer;border:none;border-radius:50%;flex:none;justify-content:center;align-items:center;width:28px;height:28px;display:inline-flex;overflow:hidden}.sr-avatar img{object-fit:cover;width:100%;height:100%;display:block}.sr-avatar-ini{color:#3a2150;letter-spacing:.02em;font-size:11px;font-weight:800}.sr-avatar-sm{width:26px;height:26px}.sr-sidemenu-profile{color:var(--ink);border-bottom:1px solid var(--brand-gray-soft);border-radius:10px;align-items:center;gap:11px;min-height:44px;margin-bottom:4px;padding:9px 10px 12px;font-size:14px;font-weight:700;text-decoration:none;transition:background .15s,color .15s;display:flex}.sr-sidemenu-profile:hover,.sr-sidemenu-profile.on{background:var(--brand-gray-soft)}.sr-sidemenu-profile .sr-avatar{width:30px;height:30px;cursor:inherit}.sr-profile{flex-direction:column;gap:14px;display:flex}.sr-profile-photo{align-items:center;gap:16px;padding-bottom:6px;display:flex}.sr-profile-circle{background:var(--purple);border-radius:50%;flex:none;justify-content:center;align-items:center;width:76px;height:76px;display:flex;overflow:hidden}.sr-profile-circle img{object-fit:cover;width:100%;height:100%;display:block}.sr-profile-circle span{color:#3a2150;font-size:26px;font-weight:800}.sr-pf-upload{border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fff;border-radius:12px;min-height:40px;padding:9px 14px;font-family:inherit;font-size:13px;font-weight:700}.sr-pf-upload:hover:not(:disabled){background:var(--brand-gray-soft)}.sr-pf-upload:disabled{opacity:.6;cursor:default}.sr-pf-field{flex-direction:column;gap:5px;display:flex}.sr-pf-field>span{color:var(--brand-gray);font-size:12px;font-weight:700}.sr-pf-field input{border:1px solid var(--line);height:46px;color:var(--ink);background:#fff;border-radius:12px;width:100%;padding:0 14px;font-family:inherit;font-size:15px}.sr-pf-field input:focus{border-color:var(--blue);outline:none}.sr-pf-field input:disabled{background:var(--brand-gray-soft);color:var(--brand-gray);cursor:not-allowed}.sr-pf-note{color:var(--brand-gray);font-size:11px}.sr-profile-actions{align-items:center;gap:12px;margin-top:4px;display:flex}.sr-pf-save{background:var(--blue);color:#fff;cursor:pointer;border:none;border-radius:12px;min-height:44px;padding:11px 22px;font-family:inherit;font-size:14px;font-weight:700}.sr-pf-save:disabled{opacity:.6;cursor:default}.sr-profile-ok{color:#1e9e5a;font-size:13px;font-weight:700}.sr-profile-err{color:var(--salmon);font-size:13px;font-weight:700}.sr-webbar-right{align-items:center;gap:10px;display:flex}.sr-langtoggle{border:1px solid var(--line);background:#fff;border-radius:999px;display:inline-flex;overflow:hidden}.sr-langtoggle button{cursor:pointer;color:var(--muted);background:#fff;border:none;min-height:28px;padding:4px 11px;font-family:Outfit,system-ui,sans-serif;font-size:12px;font-weight:700;line-height:1}.sr-langtoggle button.on{background:var(--blue);color:#fff}.sr-search{min-width:0;position:relative}.sr-search-input{font-family:var(--sr-font);border:1px solid var(--line);width:200px;max-width:42vw;color:var(--ink);background:#fff;border-radius:999px;outline:none;min-height:30px;padding:7px 12px;font-size:13px;line-height:1}.sr-search-input:focus{border-color:var(--blue)}.sr-search-input::placeholder{color:var(--muted)}.sr-search-menu{border:1px solid var(--line);z-index:50;background:#fff;border-radius:14px;width:min(380px,86vw);max-height:60vh;padding:6px;position:absolute;top:calc(100% + 6px);right:0;overflow-y:auto;box-shadow:0 12px 40px -16px #14172873}.sr-search-status{color:var(--muted);padding:12px 14px;font-size:13px}.sr-search-item{color:var(--ink);border-radius:10px;align-items:flex-start;gap:10px;padding:9px 10px;text-decoration:none;display:flex}.sr-search-item:hover{background:#f4f5f8}.sr-search-badge{letter-spacing:.03em;text-transform:uppercase;color:var(--blue);background:#eef1fb;border-radius:6px;flex:none;margin-top:1px;padding:3px 7px;font-size:10px;font-weight:800}.sr-search-text{flex-direction:column;gap:2px;min-width:0;display:flex}.sr-search-ttl{font-size:13px;font-weight:700;line-height:1.25}.sr-search-meta{color:var(--muted);font-size:11px}.sr-search-snip{color:var(--muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:11px;line-height:1.35;display:-webkit-box;overflow:hidden}@media (max-width:768px){.sr-search-input{width:130px}}.sr-crumb{color:var(--muted);padding:0 18px 2px;font-family:ui-monospace,Menlo,monospace;font-size:10px}.sr-bc-link{color:#3d5a96;align-items:center;min-height:28px;font-family:Outfit,system-ui,sans-serif;font-size:13px;font-weight:600;line-height:1.4;text-decoration:none;display:inline-flex}.sr-bc-link:hover{text-decoration:underline}.sr-bc-sep{color:#9098b2;font-family:Outfit,system-ui,sans-serif;font-size:13px}.sr-bc-cur{color:#0f1b3d;align-items:center;font-family:Outfit,system-ui,sans-serif;font-size:13px;font-weight:700;line-height:1.4;display:inline-flex}.sr-crumbnav{flex-wrap:wrap;align-items:center;gap:6px;min-width:0;padding:14px 18px 4px;display:flex}@media (max-width:768px){.sr-crumbnav{flex-wrap:nowrap;gap:4px;padding:12px 14px 4px;overflow:hidden}.sr-crumbnav .sr-bc-link,.sr-crumbnav .sr-bc-sep,.sr-crumbnav .sr-bc-cur{font-size:12px}.sr-bc-link{white-space:nowrap}.sr-bc-sep{flex:none}.sr-bc-last{flex:auto;min-width:0}.sr-bc-last .sr-bc-cur{white-space:nowrap;text-overflow:ellipsis;min-width:0;display:block;overflow:hidden}}.sr-h1{letter-spacing:-.02em;font-size:26px;font-weight:700;line-height:1.05}.sr-h2{letter-spacing:-.01em;font-size:18px;font-weight:700}.sr-sm{color:#6b6c75;font-size:13px}.sr-xs{color:var(--muted);font-size:11px}.sr-pill{background:var(--black);color:#fff;cursor:pointer;border:none;border-radius:24px;justify-content:center;align-items:center;width:100%;height:48px;padding:0 20px;font-family:inherit;font-size:15px;font-weight:600;text-decoration:none;transition:transform .12s,opacity .12s;display:flex}.sr-pill:active{transform:scale(.98)}.sr-pill:disabled{opacity:.5;cursor:not-allowed}.sr-pill.ghost{color:var(--black);border:1px solid var(--line);background:#fff}.sr-pill.sm{border-radius:20px;height:38px;font-size:13px}.sr-pill.blue{background:var(--blue)}.sr-pill.inline{width:auto;display:inline-flex}.sr-lessonnav{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:4px 18px 22px;display:flex}.sr-navlink{color:#3d5a96;cursor:pointer;background:0 0;border:0;align-items:center;min-height:40px;padding:6px 4px;font-family:inherit;font-size:13px;font-weight:600;text-decoration:none;display:inline-flex}.sr-navlink:hover{text-decoration:underline}.sr-navlink.fwd{color:#fff;background:var(--blue);border-radius:20px;min-height:38px;padding:8px 16px}.sr-navlink.fwd:hover{opacity:.92;text-decoration:none}.sr-field{border:1px solid var(--line);width:100%;height:48px;color:var(--ink);background:#fff;border-radius:14px;outline:none;align-items:center;margin-top:10px;padding:0 14px;font-family:inherit;font-size:15px;display:flex}.sr-field::placeholder{color:var(--muted)}.sr-field:focus{border-color:var(--blue)}.sr-quizdots{align-items:center;gap:6px;display:flex}.sr-quizdots i{background:#e0e1ea;border-radius:50%;width:7px;height:7px;transition:background .25s,transform .25s}.sr-quizdots i.on{background:var(--blue)}.sr-quizdots i.cur{background:var(--blue);transform:scale(1.5)}.sr-quizq{letter-spacing:-.01em;color:var(--ink);font-size:20px;font-weight:700;line-height:1.3}.sr-opt{text-align:left;cursor:pointer;border:1.5px solid var(--line);width:100%;color:var(--ink);background:#fff;border-radius:16px;align-items:center;gap:12px;padding:14px 16px;font-family:inherit;font-size:15px;transition:border-color .18s,background .18s,box-shadow .18s;display:flex}.sr-opt:hover{border-color:#bfc2d4}.sr-opt.on{border-color:var(--blue);background:#f2f4fe;box-shadow:0 0 0 3px #4058c81f}.sr-opt .lt{color:#6b6c75;background:#eef0f6;border-radius:9px;flex:none;justify-content:center;align-items:center;width:28px;height:28px;font-size:13px;font-weight:700;transition:background .18s,color .18s;display:flex}.sr-opt.on .lt{background:var(--blue);color:#fff}.sr-opt .tx{flex:1;min-width:0}.sr-comments{border-top:1px solid var(--line);margin-top:8px;padding-top:20px}.sr-comments-title{letter-spacing:-.01em;color:var(--ink);font-size:16px;font-weight:700}.sr-comments-title span{color:var(--muted);font-weight:600}.sr-comment-form{flex-direction:column;gap:10px;margin-top:14px;display:flex}.sr-comment-input{border:1.5px solid var(--line);width:100%;color:var(--ink);resize:vertical;background:#fff;border-radius:14px;outline:none;padding:12px 14px;font-family:inherit;font-size:14px;line-height:1.4}.sr-comment-input:focus{border-color:var(--blue)}.sr-comment-input::placeholder{color:var(--muted)}.sr-comment{background:#f6f7fb;border-radius:14px;padding:12px 14px}.sr-comment.admin{background:#f2f4fe;border:1px solid #4058c82e}.sr-comment-head{justify-content:space-between;align-items:center;gap:8px;display:flex}.sr-comment-author{color:var(--ink);align-items:center;gap:7px;font-size:13px;font-weight:700;display:flex}.sr-comment-badge{text-transform:uppercase;letter-spacing:.02em;background:var(--blue);color:#fff;border-radius:6px;padding:2px 6px;font-size:10px;font-weight:700}.sr-comment-time{color:var(--muted);white-space:nowrap;font-size:11px}.sr-comment-body{color:#2d2f36;white-space:pre-wrap;margin-top:6px;font-size:14px;line-height:1.45}.sr-reply-link{cursor:pointer;color:var(--blue);background:0 0;border:none;margin-top:8px;margin-left:26px;padding:0;font-family:inherit;font-size:12px;font-weight:700}.sr-comment-actions{gap:14px;margin-top:8px;display:flex}.sr-comment-action{cursor:pointer;color:var(--muted);background:0 0;border:none;padding:0;font-family:inherit;font-size:12px;font-weight:700}.sr-comment-action:hover{color:var(--blue)}.sr-comment-action.danger:hover{color:#c8102e}.sr-prog{background:#ebecf2;border-radius:6px;height:6px;overflow:hidden}.sr-prog>i{background:var(--blue);border-radius:6px;height:100%;transition:width .4s;display:block}.sr-card{color:#fff;border-radius:18px;padding:16px;text-decoration:none;display:block}.sr-card .lv{letter-spacing:-.03em;font-size:34px;font-weight:700}.sr-wave{align-items:flex-end;gap:3px;display:flex}.sr-wave span{border-radius:3px;width:5px;display:block}.sr-tabs{scrollbar-width:none;gap:6px;margin:2px 0;padding-bottom:2px;display:flex;overflow-x:auto}.sr-tabs::-webkit-scrollbar{display:none}.sr-tab{color:#5a5b63;white-space:nowrap;cursor:pointer;background:#f0f1f6;border:none;border-radius:14px;flex:none;padding:8px 13px;font-family:inherit;font-size:12px;font-weight:600}.sr-tab.on{background:var(--black);color:#fff}.sr-chips{flex-wrap:wrap;gap:6px;margin-top:10px;display:flex}.sr-chip{white-space:nowrap;cursor:pointer;border:none;border-radius:14px;padding:7px 13px;font-family:inherit;font-size:12px;font-weight:600}.sr-modlist{flex-direction:column;gap:9px;margin-top:12px;display:flex}.sr-modcard{cursor:pointer;text-align:left;border:none;border-radius:20px;flex-direction:column;justify-content:space-between;width:100%;min-height:104px;padding:14px 15px;font-family:inherit;text-decoration:none;display:flex}.sr-modcard.locked{cursor:default}.sr-modcard .mtop{justify-content:space-between;align-items:flex-start;gap:6px;display:flex}.sr-modcard .sr-modcard-eyebrow{letter-spacing:.04em;opacity:.8;margin-bottom:2px;font-size:12px;font-weight:800}.sr-modcard .mttl{letter-spacing:-.02em;font-size:19px;font-weight:700;line-height:1.05}.sr-modcard .sr-modcard-desc{opacity:.82;-webkit-line-clamp:3;-webkit-box-orient:vertical;margin-top:6px;font-size:13px;line-height:1.45;display:-webkit-box;overflow:hidden}.sr-modcard .mpct{flex:none;margin-top:2px;font-size:12px;font-weight:700}.sr-modcard .mbot{align-items:center;gap:6px;margin-top:auto;padding-top:12px;display:flex}.sr-tagpill{white-space:nowrap;border:1px solid;border-radius:11px;padding:3px 8px;font-size:9.5px;font-weight:600;line-height:1}.sr-marrow{background:var(--black);color:#fff;border-radius:50%;flex:none;justify-content:center;align-items:center;width:28px;height:28px;margin-left:auto;font-size:13px;display:flex}.sr-lessonrow{align-items:center;gap:10px;display:flex}.sr-lessonrow .ic{border-radius:8px;flex:none;justify-content:center;align-items:center;width:26px;height:26px;font-size:11px;display:flex}.sr-lessonrow .tt{flex:1;font-size:13px;font-weight:600}.sr-lessonrow.current{background:#f0f1f6;border-radius:12px;margin:0 -8px;padding:8px}.sr-lessonrow.locked{opacity:.45}.sr-lessonstack{gap:10px}.sr-lessonrow .sr-lr-cover{background:#e7e8ee;border-radius:8px;flex:none;width:64px;height:38px;display:block;position:relative;overflow:hidden}.sr-lr-img{object-fit:cover;width:100%;height:100%;display:block}.sr-lr-done{color:var(--citrus);background:#292b2d73;justify-content:center;align-items:center;font-size:16px;font-weight:700;display:flex;position:absolute;inset:0}.sr-lr-title{color:var(--ink);font-size:13px;font-weight:600;line-height:1.25}.sr-lr-desc{color:var(--muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:11px;font-weight:400;line-height:1.35;display:-webkit-box;overflow:hidden}@media (min-width:768px){.sr-lessonstack{gap:14px}.sr-lessonrow{gap:16px}.sr-lessonrow .sr-lr-cover{border-radius:12px;width:128px;height:72px}.sr-lessonrow .ic{border-radius:12px;width:44px;height:44px;font-size:16px}.sr-lr-done{font-size:30px}.sr-lr-title{font-size:16px}.sr-lr-desc{-webkit-line-clamp:3;font-size:13px}.sr-tagpill{padding:4px 10px;font-size:11px}}@media (min-width:1024px){.sr-lessonstack{gap:16px}.sr-lessonrow .sr-lr-cover{width:168px;height:95px}.sr-lessonrow .ic{width:48px;height:48px;font-size:17px}.sr-lr-title{font-size:18px}.sr-lr-desc{font-size:14px}}.sr-substack{flex-direction:column;gap:16px;display:flex}.sr-subtopic{border:1px solid var(--line);background:#fff;border-radius:16px;padding:14px}.sr-subtopic-head{border-bottom:1px solid 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