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input{width:20px;height:20px}.push-actions{display:grid;gap:12px;margin-top:20px}.android-web-header{position:sticky;top:0;z-index:45;justify-content:flex-start;gap:12px;min-height:68px;background:var(--rt-surface);padding:6px 16px}.android-web-header .brand-name{flex:1;color:var(--rt-text);font-size:20px;font-weight:700}.android-web-header .brand-name small{color:var(--rt-text-muted);opacity:1;font-size:10px}.android-web-header .brand-mascot{width:48px;height:48px;object-fit:contain}.android-shell .lesson-card-start{scroll-margin-top:84px}.android-drawer{position:fixed;inset:0 auto 0 0;margin:0;width:min(320px,86vw);height:100vh;height:100dvh;max-height:100dvh;max-width:none;padding:20px;border:0;border-radius:0 20px 20px 0;background:var(--rt-surface);color:var(--rt-text);box-shadow:8px 0 32px #0003}.android-drawer[open]{animation:leard-menu-in .18s ease-out}.android-drawer::backdrop{background:#0f172a88}.android-drawer-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;font-size:26px}.android-drawer nav{display:grid;gap:8px}.android-drawer nav button,.android-drawer nav a{display:flex;align-items:center;justify-content:flex-start;gap:12px;width:100%;padding:14px 12px;min-height:52px;text-align:left;text-decoration:none;font:inherit;color:var(--rt-text);background:transparent;border:0;border-radius:12px}.android-drawer nav button:hover,.android-drawer nav a:hover{background:var(--rt-surface-muted)}.quick-question{padding-bottom:140px}.android-shell .answer-option{touch-action:manipulation}.answer-gesture-help{font-size:13px;color:var(--rt-text-muted)}.android-answer-bar{position:fixed;inset:auto 0 0;z-index:42;width:100%;max-width:820px;margin:0 auto;padding:10px 16px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--rt-border);background:var(--rt-surface);box-shadow:0 -4px 18px #0001}.android-answer-bar>button{width:100%;min-height:52px;justify-content:center;font-size:18px}.android-answer-result{display:flex;gap:8px;align-items:center;margin-bottom:8px;flex-wrap:wrap}.android-answer-result>span:last-child{font-size:12px;margin-left:auto;color:var(--rt-text-muted)}.android-answer-bar.correct strong{color:var(--rt-success)}.android-answer-bar.incorrect strong{color:var(--rt-danger)}:root{--leard-answer-good: #dcfce7;--leard-answer-bad: #fee2e2}[data-theme=dark]{--leard-answer-good: #17231e;--leard-answer-bad: #34201b}.learner-app-mode[data-theme=dark][data-answer-result=correct] .quick-question .lesson-card{border-color:var(--rt-success);box-shadow:0 0 0 1px var(--rt-success),0 0 22px #51f6cf20}.learner-app-mode[data-theme=dark][data-answer-result=correct] .android-answer-bar{border-top-color:var(--rt-success)}[data-answer-result=correct] body,[data-answer-result=correct] .android-shell,[data-answer-result=correct] .quick-question .lesson-card{background:var(--leard-answer-good)}[data-answer-result=incorrect] body,[data-answer-result=incorrect] .android-shell,[data-answer-result=incorrect] .quick-question .lesson-card{background:var(--leard-answer-bad)}[data-answer-result=correct] .quick-question .answer-option.selected{border-color:var(--rt-success);background:var(--leard-answer-good)}[data-answer-result=incorrect] .quick-question .answer-option.selected{border-color:var(--rt-danger);background:var(--leard-answer-bad)}.material-overlay{overscroll-behavior:contain}@keyframes leard-menu-in{0%{transform:translate(-100%)}to{transform:translate(0)}}@media(prefers-reduced-motion:reduce){.android-drawer[open]{animation:none}}