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.main-menu{flex-direction:column;align-items:stretch;gap:12px;width:100%;padding-top:16px;display:none}.main-header.main-header-r4 .main-menu.is-open{display:flex}.main-header.main-header-r4 .main-nav-pages{grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;display:grid}.main-header.main-header-r4 .main-nav-pages a{padding:10px 5px;font-size:14px}.main-header.main-header-r4 .main-nav-labs{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.main-header.main-header-r4 .main-nav-shortcuts{border-top:1px solid #dcdfd8;border-left:0;gap:12px;padding:10px 0 0}.main-header.main-header-r4 .main-shortcut-tooltip{inset:auto auto calc(100% + 6px) 0}}@media (prefers-reduced-motion:reduce){.main-header.main-header-r4 a{transition:none}}@media (min-width:1121px){.main-header.main-header-r4 .main-nav-labs,.main-header.main-header-r4 .main-nav-shortcuts{border:0;padding-left:18px;position:relative}.main-header.main-header-r4 .main-nav-labs:before,.main-header.main-header-r4 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