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div{gap:2px;display:grid}html[data-skin] .teacher-mobile-menu3>header small,html[data-skin] .teacher-mobile-menu3>section>small{color:var(--skin-muted);letter-spacing:.1em;font-size:.72rem;font-weight:850}html[data-skin] .teacher-mobile-menu3>header strong{font-size:1.35rem;line-height:1.2}html[data-skin] .teacher-mobile-menu3>header>button{border:1.5px solid var(--skin-line);background:var(--skin-soft);width:42px;height:42px;min-height:42px;color:var(--skin-ink);box-shadow:var(--ui-button-shadow);border-radius:50%;place-items:center;padding:0;display:grid}html[data-skin] .teacher-mobile-menu3>header>button svg{fill:none;stroke:currentColor;stroke-width:2px;width:21px;height:21px}html[data-skin] .teacher-mobile-menu3>section{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:18px;display:grid}html[data-skin] .teacher-mobile-menu3>section>small{grid-column:1/-1;margin:0 2px}html[data-skin] .teacher-mobile-menu3>section>button{border:1.5px solid var(--skin-line);border-radius:var(--ui-control-radius);background:var(--skin-soft);min-height:58px;color:var(--skin-ink);text-align:left;box-shadow:var(--ui-button-shadow);grid-template-columns:34px minmax(0,1fr);align-items:center;gap:8px;padding:9px;transition:transform .18s,background-color .18s,box-shadow .18s;display:grid;position:relative}html[data-skin] .teacher-mobile-menu3>section>button .nav3-icon{width:26px;height:26px}html[data-skin] .teacher-mobile-menu3>section>button .nav3-label{min-width:0;font-size:.9rem;line-height:1.25}html[data-skin] .teacher-mobile-menu3>section>button.active{background:var(--skin-accent);border-color:var(--skin-line)}html[data-skin] .teacher-mobile-menu3>section>button:disabled{cursor:not-allowed;opacity:.62;box-shadow:none}html[data-skin] .teacher-mobile-menu3>section>button .dev{border:1px solid var(--skin-line);background:var(--skin-surface);border-radius:999px;padding:1px 5px;font-size:.58rem;font-style:normal;position:absolute;top:4px;right:5px}html[data-skin] .teacher-mobile-menu3>.teacher-exclusive-section3{border-top:2px solid var(--skin-line);border-radius:var(--ui-control-radius);background:color-mix(in srgb,var(--skin-accent) 18%,var(--skin-surface));margin-top:22px;padding:16px 10px 10px}html[data-skin] .teacher-mobile-menu3>.teacher-exclusive-section3>small{color:var(--skin-ink)}html[data-skin] .teacher-mobile-menu3 :is(button):focus-visible{outline:3px solid var(--skin-third);outline-offset:2px}}@media (max-width:380px){html[data-skin] .mobile-nav-trigger3 span{display:none}html[data-skin] .mobile-nav-trigger3{padding-inline:9px}html[data-skin] .teacher-mobile-menu3>section{grid-template-columns:1fr}html[data-skin] .teacher-mobile-menu3>section>small{grid-column:1}}@media (hover:hover) and (max-width:800px){html[data-skin] .mobile-nav-trigger3:hover,html[data-skin] .teacher-mobile-menu3 button:not(:disabled):hover{box-shadow:var(--ui-card-hover-shadow);transform:translateY(-2px)}}html[data-skin] .v3 .top3>div:last-child>.top-login3,html[data-skin] .v3 .guest-preview3>button{border:2px solid var(--skin-line);border-radius:var(--ui-control-radius);background:var(--skin-accent);min-height:44px;color:var(--skin-on-accent);box-shadow:var(--ui-button-shadow);font-weight:800;line-height:1.2;transition:transform .18s,background-color .18s,box-shadow .18s}html[data-skin] .v3 .top3>div:last-child>.top-login3,html[data-skin] .v3 .top3>div:last-child>button.skin-trigger{letter-spacing:0;font-family:inherit;font-size:.875rem;font-weight:800;line-height:1.2}html[data-skin] .v3 .top3>div:last-child>.top-login3{width:auto;height:auto;padding:9px 15px}@media (max-width:620px){html[data-skin] .v3 .top3>div:last-child>.top-login3{min-height:44px;padding:8px 12px}html[data-skin] .v3 .top3>div:last-child>:is(.top-login3,button.skin-trigger){font-size:.8125rem}}@media (hover:hover){html[data-skin] .v3 :is(.top-login3,.guest-preview3>button):hover{background:color-mix(in srgb,var(--skin-accent) 82%,var(--skin-surface));box-shadow:var(--ui-card-hover-shadow);transform:translateY(-2px)}}html[data-skin] .v3 :is(.top-login3,.guest-preview3>button):active{box-shadow:var(--ui-card-inset);transform:translateY(1px)}html[data-skin] .v3 :is(.top-login3,.guest-preview3>button):focus-visible{outline:3px solid var(--skin-ink);outline-offset:3px}@media (prefers-reduced-motion:reduce){html[data-skin] :is(.mobile-nav-trigger3,.teacher-mobile-menu3 button){transition:none!important}html[data-skin] :is(.mobile-nav-trigger3,.teacher-mobile-menu3 button):is(:hover,:active){transform:none!important}html[data-skin] .v3 :is(.top-login3,.guest-preview3>button){transition:none!important}html[data-skin] .v3 :is(.top-login3,.guest-preview3>button):is(:hover,:active){transform:none!important}}