:root{--ink:#16233b;--ink-700:#22324f;--ink-600:#324465;--ink-soft:#41527a;--brass:#b0833a;--brass-soft:#c8a45c;--brass-tint:#f4ecdc;--brass-text:#8a6520;--paper:#f8f5ef;--paper-2:#f2eee5;--surface:#fff;--surface-2:#fbfaf6;--line:#e7e0d3;--line-strong:#d8cfbe;--ink-text:#1e2733;--muted:#5b6573;--muted-2:#8a9099;--ok:#2f7a55;--ok-bg:#e6f1ea;--warn:#b0833a;--warn-bg:#f6ecd7;--err:#b23b3b;--err-bg:#f7e5e3;--info:#2f4a7a;--info-bg:#e6ecf6;--ai:#6b4fa0;--ai-bg:#eee9f6;--serif:"Spectral", Georgia, "Times New Roman", serif;--sans:"Public Sans", system-ui, -apple-system, sans-serif;--mono:"IBM Plex Mono", ui-monospace, monospace;--r-xs:4px;--r-sm:6px;--r-md:8px;--r-lg:12px;--r-xl:16px;--sh-1:0 1px 2px #16233b0f, 0 1px 3px #16233b0d;--sh-2:0 2px 6px #16233b12, 0 8px 24px #16233b0f;--sh-3:0 12px 40px 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#ffffff14;padding:12px}.user-chip{border-radius:var(--r-sm);cursor:pointer;align-items:center;gap:10px;padding:8px;display:flex}.user-chip:hover{background:#ffffff0f}.avatar{background:var(--brass-tint);width:32px;height:32px;color:var(--ink);border-radius:50%;flex:none;place-items:center;font-size:13px;font-weight:600;display:grid}.avatar.lg{width:44px;height:44px;font-size:16px}.main{flex-direction:column;min-width:0;display:flex}.topbar{z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#f8f5efdb;align-items:center;gap:18px;padding:14px 32px;display:flex;position:sticky;top:0}.crumbs{color:var(--muted);align-items:center;gap:7px;font-size:13px;display:flex}.crumbs b{color:var(--ink-text);font-weight:600}.page-title{font-size:20px}.topbar-spacer{flex:1}.content{width:100%;max-width:1320px;margin:0 auto;padding:28px 32px 56px}.search{background:var(--surface);border:1px solid 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.2s;display:none;position:fixed;inset:0}.scrim.show{opacity:1;display:block}.bottom-tabs{z-index:40;background:var(--surface);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));justify-content:space-around;display:none;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -4px 16px #16233b0f}.bottom-tabs a{color:var(--muted);border-radius:var(--r-sm);flex-direction:column;align-items:center;gap:3px;min-width:60px;padding:6px 10px;font-size:10.5px;font-weight:600;display:flex}.bottom-tabs a svg{width:21px;height:21px}.bottom-tabs a.active{color:var(--ink)}.bottom-tabs a.active svg{color:var(--brass)}@media (max-width:1024px){.app{grid-template-columns:1fr}.mobile-top{display:flex}.sidebar{z-index:50;width:min(300px,86vw);height:100dvh;box-shadow:var(--sh-3);transition:transform .24s;display:flex;position:fixed;top:0;left:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.g-4,.g-3{grid-template-columns:repeat(2,1fr)}.g-2{grid-template-columns:1fr}.content{padding:20px}.topbar{padding:12px 18px}.topbar .search{display:none}}@media (max-width:760px){.g-4,.g-3,.g-2{grid-template-columns:1fr}body.has-tabs .content{padding-bottom:92px}body.has-tabs .bottom-tabs{display:flex}.work,.lwrap{grid-template-columns:1fr!important;height:auto!important}.work .gpanel,.lwrap .lessons,.lwrap .doubts{border-left:0;border-top:1px solid var(--line)}.pdf-area{padding:14px}.topbar{flex-wrap:wrap}}
@media (max-width:860px){.course-detail,.player-wrap{grid-template-columns:1fr!important}.player-wrap .player-sidebar{order:-1}}