@media (max-width:640px){.nn-lesson-content-card{margin:12px 10px!important}.nn-lesson-content-body{padding:16px!important}.nn-chapter-overview{padding:0!important;border:none!important;box-shadow:none!important;background:transparent!important;margin-bottom:12px!important}}@media (max-width:900px){.nn-tab-nav{display:grid!important;grid-template-columns:repeat(3,1fr)!important;gap:8px!important;overflow:visible!important;position:static!important}.nn-tab-nav::after{content:none!important}.nn-tab-btn{display:flex!important;align-items:center!important;justify-content:center!important;flex:none!important;width:100%!important;min-height:46px!important;padding:8px 4px!important;font-size:12.5px!important;font-weight:700!important;line-height:1.25!important;white-space:normal!important;text-align:center!important;border-radius:12px!important;margin-bottom:0!important;background:#F8F9FB!important;border:1px solid #E7E9EC!important;box-shadow:0 1px 2px rgb(15 23 42 / .05)!important;transition:transform .12s ease,box-shadow .12s ease!important}.nn-tab-btn:active{transform:scale(.96)!important}.nn-tab-btn.is-active{background:linear-gradient(135deg,#16A085,#11876F)!important;border-color:#16A085!important;color:#fff!important;box-shadow:0 6px 14px rgb(22 160 133 / .32)!important}}