:root{--tg-bg: #ffffff;--tg-secondary-bg: #f1f3f5;--tg-text: #0f1419;--tg-hint: #6b7785;--tg-link: #2f6fed;--tg-button: #2f6fed;--tg-button-text: #ffffff;--tg-destructive: #e0392b;--radius: 14px;--gap: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);--accent: #12a66b;--gold: #e0a815}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;background:var(--tg-secondary-bg);color:var(--tg-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.45;overscroll-behavior-y:none}#root{min-height:100vh;padding-bottom:80px}a{color:var(--tg-link);text-decoration:none}button{font-family:inherit;cursor:pointer}.page{padding:var(--gap);max-width:640px;margin:0 auto}.stack{display:flex;flex-direction:column;gap:var(--gap)}.row{display:flex;align-items:center;gap:8px}.spread{display:flex;align-items:center;justify-content:space-between;gap:8px}.wrap{flex-wrap:wrap}.grow{flex:1}.center{text-align:center}.muted{color:var(--tg-hint)}.small{font-size:13px}.tiny{font-size:12px}.bold{font-weight:700}.mt{margin-top:var(--gap)}.mb{margin-bottom:var(--gap)}h1{font-size:24px;margin:4px 0 12px;font-weight:800}h2{font-size:19px;margin:16px 0 8px;font-weight:700}h3{font-size:16px;margin:8px 0;font-weight:700}.card{background:var(--tg-bg);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.card.tap{transition:transform .08s}.card.tap:active{transform:scale(.985)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--tg-button);color:var(--tg-button-text);border:none;border-radius:var(--radius);padding:13px 18px;font-size:15px;font-weight:600;width:100%}.btn:active{opacity:.85}.btn.secondary{background:var(--tg-secondary-bg);color:var(--tg-text)}.btn.ghost{background:transparent;color:var(--tg-link);box-shadow:none}.btn.danger{background:transparent;color:var(--tg-destructive)}.btn.sm{padding:9px 14px;font-size:14px;width:auto}.btn:disabled{opacity:.5}.chip{display:inline-flex;align-items:center;gap:5px;background:var(--tg-secondary-bg);border-radius:999px;padding:6px 12px;font-size:13px;border:none;color:var(--tg-text)}.chip.active{background:var(--tg-button);color:var(--tg-button-text)}.input{width:100%;border:1.5px solid transparent;background:var(--tg-secondary-bg);border-radius:var(--radius);padding:13px 16px;font-size:16px;color:var(--tg-text);outline:none}.input:focus{border-color:var(--tg-button)}.headword{font-size:26px;font-weight:800}.translit{color:var(--tg-hint);font-size:15px}.badge{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:6px;background:var(--tg-secondary-bg);color:var(--tg-hint);text-transform:uppercase;letter-spacing:.02em}.badge.premium{background:#fef3c7;color:#92600a}.badge.gold{background:var(--gold);color:#fff}.badge.accent{background:#12a66b1f;color:var(--accent)}.lock{display:flex;align-items:center;gap:8px;padding:12px 14px;border-radius:var(--radius);background:#fff8e6;color:#92600a;font-size:14px;border:1px dashed #e0c060}[data-theme=dark] .lock{background:#e0a8151f;border-color:#e0a81559;color:#e0c878}.tabbar{position:fixed;left:0;right:0;bottom:0;display:flex;background:var(--tg-bg);border-top:1px solid rgba(128,128,128,.15);padding:6px 0 max(6px,env(safe-area-inset-bottom));z-index:50}.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px;color:var(--tg-hint);font-size:10px}.tabbar a.active{color:var(--tg-button)}.tabbar .ic{font-size:22px;line-height:1}.progress{height:8px;background:var(--tg-secondary-bg);border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .3s}.skeleton{background:linear-gradient(90deg,var(--tg-secondary-bg) 25%,rgba(128,128,128,.1) 50%,var(--tg-secondary-bg) 75%);background-size:200% 100%;animation:sk 1.3s infinite;border-radius:var(--radius)}@keyframes sk{to{background-position:-200% 0}}.list-item{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--tg-bg);border-radius:var(--radius);gap:10px}.divider{height:1px;background:#8080801f;margin:4px 0}.streak-flame{font-size:20px}.stat{text-align:center;padding:10px}.stat .num{font-size:22px;font-weight:800}.stat .lbl{font-size:11px;color:var(--tg-hint)}.option{padding:14px 16px;border-radius:var(--radius);background:var(--tg-bg);border:2px solid transparent;font-size:16px;text-align:left;width:100%;color:var(--tg-text)}.option.selected{border-color:var(--tg-button)}.option.correct{border-color:var(--accent);background:#12a66b14}.option.wrong{border-color:var(--tg-destructive);background:#e0392b0f}.empty{text-align:center;padding:48px 20px;color:var(--tg-hint)}.empty .ic{font-size:48px;margin-bottom:12px}.toast{position:fixed;left:50%;bottom:90px;transform:translate(-50%);background:var(--tg-text);color:var(--tg-bg);padding:10px 18px;border-radius:999px;font-size:14px;z-index:100;box-shadow:var(--shadow);animation:toast-in .2s}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,8px)}}