:root{--ink:#202235;--muted:#7f8195;--line:#e9e9f0;--paper:#fff;--bg:#f6f6fa;--purple:#655de8;--purple-dark:#4f48ce;--lav:#eeedff;--mint:#dff6ea;--mint-ink:#27815a;--coral:#ffe9e3;--coral-ink:#c76049;--amber:#fff3d7;--amber-ink:#9b6e16;--shadow:0 12px 32px rgba(35,31,90,.06)}.sidebar{background:#fff;border-right:1px solid var(--line);padding:25px 16px 18px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:11px;padding:0 10px 28px}.brand-mark{width:40px;height:40px;border-radius:13px;background:linear-gradient(145deg,#8982ff,#6057df);display:grid;place-items:center;color:#fff;box-shadow:0 8px 18px #7169e744}.brand-name{font-weight:750;font-size:14px;letter-spacing:-.3px}.brand-sub{font-size:11px;color:var(--muted);margin-top:3px}.nav-label{padding:0 12px;margin:13px 0 8px;color:#a0a1b1;font-size:10px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase}.nav{display:grid;gap:4px}.nav button{width:100%;border:0;background:transparent;color:#74768a;text-align:left;display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:11px;font:inherit;font-weight:600;cursor:pointer}.nav button:hover{background:#f8f8fc;color:var(--ink)}.nav button.active{background:var(--lav);color:var(--purple-dark)}.nav .ico{width:19px;text-align:center;font-size:16px}.child-nav{display:grid;gap:4px}.child-nav button{display:flex;align-items:center;gap:10px;border:0;background:transparent;padding:9px 12px;border-radius:10px;color:#737588;font:inherit;font-weight:600;cursor:pointer}.child-nav button:hover{background:#f8f8fc}.avatar{width:23px;height:23px;border-radius:8px;display:grid;place-items:center;color:#fff;font-size:10px;font-weight:800}.side-bottom{margin-top:auto}.privacy-note{background:#f8f8fc;border:1px solid var(--line);border-radius:12px;padding:12px;color:#84869a;font-size:11px;line-height:1.55}.privacy-note b{color:#505268;display:block;margin-bottom:3px}.sidebar .btn{border:0;border-radius:10px;padding:10px 14px;font:inherit;font-weight:700;cursor:pointer;transition:.15s}.sidebar .btn:hover{transform:translateY(-1px)}.sidebar .btn-white{background:#fff;color:var(--purple-dark)}.sidebar .btn-ghost{background:#ffffff20;color:#fff;border:1px solid #ffffff55}.sidebar .btn-primary{background:var(--purple);color:#fff}.sidebar .btn-light{background:#f4f3ff;color:var(--purple-dark)}.sidebar .btn-outline{background:#fff;border:1px solid var(--line);color:#606277}.sidebar .btn-danger{background:#fff0ed;color:#b9513c}.sidebar .btn-sm{padding:8px 11px;font-size:12px}@media(max-width:760px){.sidebar{height:auto;position:relative;padding:12px 14px;border-right:0;border-bottom:1px solid var(--line)}.brand{padding:0 4px 10px}.nav-label{display:none}.nav{display:flex;overflow-x:auto;gap:4px;padding-bottom:2px}.nav button{white-space:nowrap;width:auto;padding:9px 11px;font-size:11px}.nav .ico{font-size:14px}.child-nav,.side-bottom{display:none}}.child-checkbox .avatar{width:21px;height:21px}.sidebar{padding:22px 14px 16px;overflow-y:auto}.brand{padding:0 10px 18px}.brand-mark{background:#426855;box-shadow:none;border-radius:10px;flex-shrink:0}.brand-name{font-size:13px}.nav{gap:16px}.nav-group{display:grid;gap:3px}.nav-label{color:#738177;font-size:10px;font-weight:650;letter-spacing:.8px;margin:0 0 6px;padding:0 12px}.nav button{padding:9px 12px;min-height:38px;border-radius:6px;font-size:12px;font-weight:550;color:#526159}.nav button.active{font-weight:700}.nav button:hover{background:#f2f6f3}.nav .ico{font-size:15px}.sidebar>.nav-label{margin-top:24px}.child-nav button{padding:7px 12px;font-size:12px}.side-bottom{padding-top:24px}.privacy-note{padding:8px 10px;background:transparent;border:0;color:var(--muted);font-size:10px}.release-link{font-size:11px;margin-left:10px;color:var(--purple-dark)}.mobile-menu{display:none}.sidebar .btn{border-radius:7px;font-weight:600}.sidebar .btn:hover{transform:none}.sidebar .btn-light{background:#eaf1ec}@media(max-width:760px){.sidebar{padding:12px}.brand{padding:0 2px 12px}.brand-mark{height:34px;width:34px}.brand-sub{font-size:10px}.mobile-menu{display:flex;width:100%;justify-content:space-between;align-items:center;min-height:44px;font-size:13px}.sidebar .nav{display:none;overflow:visible;padding:16px 0 8px}.sidebar.menu-open .nav{display:grid;gap:18px;grid-template-columns:repeat(2,minmax(0,1fr))}.nav-group:last-child{grid-column:1/-1}.nav button{white-space:normal;min-height:44px;font-size:12px;width:100%;padding:10px;line-height:1.4}.sidebar .nav-label{display:block;margin-bottom:6px;padding-left:10px}.sidebar>.nav-label,.sidebar .child-nav,.sidebar .side-bottom{display:none}.sidebar.menu-open>.nav-label{display:block;margin-top:12px}.sidebar.menu-open .child-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.sidebar.menu-open .side-bottom{display:block;padding-top:12px}}.learner-mode .nav-group 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