*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #4f46e5;--primary-dark: #4338ca;--primary-light: #e0e7ff;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--text: #1e293b;--text-secondary: #64748b;--text-muted: #94a3b8;--bg: #f0f4f8;--surface: #ffffff;--border: #e2e8f0;--radius: 16px;--radius-sm: 10px;--radius-lg: 24px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px)}html{height:100%;overscroll-behavior:none}body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg);height:100%;color:var(--text);-webkit-text-size-adjust:100%;-webkit-overflow-scrolling:touch;overscroll-behavior:none}button,a{touch-action:manipulation}#root{height:100%;display:flex;flex-direction:column}.app{width:100%;max-width:480px;margin:0 auto;height:100%;display:flex;flex-direction:column;padding-top:var(--safe-top);overflow:hidden;position:relative}.screen{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;overflow:hidden;background:var(--bg);padding-bottom:var(--safe-bottom);transition:transform .28s cubic-bezier(.4,0,.2,1),opacity .28s ease}.screen-enter{transform:translate(100%);opacity:0}.screen-active{transform:translate(0);opacity:1}.screen-exit{transform:translate(-30%);opacity:0;pointer-events:none}.home{display:flex;flex-direction:column;height:100%;padding:16px 20px 24px;gap:0;overflow-y:auto}.home-topbar{display:flex;justify-content:flex-end;align-items:center;padding-bottom:12px}.lang-switcher{display:flex;gap:6px}.lang-btn{background:var(--border);border:2px solid transparent;border-radius:99px;padding:6px 14px;font-size:.82rem;font-weight:500;cursor:pointer;font-family:inherit;color:var(--text-secondary);transition:all .15s;-webkit-tap-highlight-color:transparent}.lang-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.learn-lang-section{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.learn-lang-label{font-size:.72rem;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em}.learn-lang-tabs{display:flex;gap:8px}.learn-lang-btn{flex:1;background:var(--border);border:2px solid transparent;border-radius:14px;padding:12px 8px;font-size:.9rem;font-weight:600;cursor:pointer;font-family:inherit;color:var(--text-secondary);transition:all .15s;text-align:center;-webkit-tap-highlight-color:transparent}.learn-lang-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.home-hero{display:flex;flex-direction:column;align-items:center;gap:4px;margin-bottom:20px}.home-title{font-size:2.2rem;font-weight:700;text-align:center}.home-subtitle{color:var(--text-secondary);font-size:.88rem;text-align:center}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:20px}.stat-card{background:var(--surface);border-radius:var(--radius);padding:14px 10px;text-align:center;box-shadow:0 1px 4px #00000012}.stat-num{font-size:1.7rem;font-weight:700;color:var(--primary);display:block;line-height:1.1}.stat-label{font-size:.68rem;color:var(--text-muted);display:block;margin-top:3px;font-weight:500}.home-actions{display:flex;flex-direction:column;gap:10px;margin-top:auto;padding-top:16px}.btn-primary{background:var(--primary);color:#fff;border:none;border-radius:var(--radius);padding:17px 24px;font-size:1rem;font-weight:600;cursor:pointer;width:100%;font-family:inherit;transition:background .15s,transform .1s;-webkit-tap-highlight-color:transparent;min-height:54px}.btn-primary:active:not(:disabled){transform:scale(.98);background:var(--primary-dark)}.btn-primary:disabled{background:#c7d2fe;cursor:not-allowed}.btn-secondary{background:var(--surface);color:var(--primary);border:2px solid var(--primary);border-radius:var(--radius);padding:15px 24px;font-size:1rem;font-weight:600;cursor:pointer;width:100%;font-family:inherit;transition:all .15s;-webkit-tap-highlight-color:transparent;min-height:54px}.btn-secondary:active{background:var(--primary-light)}.btn-link{background:none;border:none;color:var(--primary);cursor:pointer;font-size:.88rem;font-family:inherit;padding:10px 0;text-align:center;-webkit-tap-highlight-color:transparent;min-height:44px;display:flex;align-items:center;justify-content:center;gap:6px}.btn-back{background:var(--surface);border:none;cursor:pointer;color:var(--text-secondary);font-size:1.1rem;padding:8px 10px;border-radius:var(--radius-sm);-webkit-tap-highlight-color:transparent;display:flex;align-items:center;justify-content:center;min-width:40px;min-height:40px}.study{display:flex;flex-direction:column;height:100%;padding:12px 16px 16px;gap:12px}.study-header{display:flex;align-items:center;gap:10px;flex-shrink:0}.progress-bar-wrap{flex:1;background:var(--border);border-radius:99px;height:6px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--primary);border-radius:99px;transition:width .4s ease}.progress-text{font-size:.78rem;color:var(--text-muted);white-space:nowrap;font-weight:500}.card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:0 4px 20px #00000014,0 1px 4px #0000000a;padding:22px 20px 16px;flex:1;display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;min-height:0}.card-badge{display:inline-flex;align-items:center;gap:4px;font-size:.68rem;font-weight:700;padding:3px 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solid var(--primary);border-radius:8px;padding:10px 12px}.card-example-sl{font-size:.92rem;font-weight:500;color:var(--text);line-height:1.4}.card-example-en{font-size:.8rem;color:var(--text-secondary);margin-top:3px;line-height:1.4}.card-example-sl-row{display:flex;align-items:flex-start;gap:6px}.buttons-row{display:grid;gap:8px;flex-shrink:0}.buttons-4{grid-template-columns:repeat(4,1fr)}.buttons-3{grid-template-columns:repeat(3,1fr)}.buttons-2{grid-template-columns:1fr 1fr}.buttons-1{grid-template-columns:1fr}.btn-again,.btn-hard,.btn-good,.btn-easy,.btn-next,.btn-got-it{border:none;border-radius:var(--radius-sm);font-family:inherit;font-weight:600;cursor:pointer;transition:transform .1s,filter .1s;-webkit-tap-highlight-color:transparent;min-height:52px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;line-height:1.2}.btn-again:active,.btn-hard:active,.btn-good:active,.btn-easy:active{transform:scale(.95);filter:brightness(.92)}.btn-again{background:#fee2e2;color:#991b1b;font-size:.82rem}.btn-hard{background:#fef3c7;color:#92400e;font-size:.82rem}.btn-good{background:#d1fae5;color:#065f46;font-size:.82rem}.btn-easy{background:#cffafe;color:#155e75;font-size:.82rem}.btn-next,.btn-got-it{background:var(--primary);color:#fff;font-size:.95rem;border-radius:var(--radius);width:100%}.btn-next:active,.btn-got-it:active{transform:scale(.98)}.card-state-label{font-size:.65rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin-bottom:-4px}.rate-hint{font-size:.6rem;opacity:.65;font-weight:400}.card-grammar-rule{display:flex;flex-direction:column;gap:10px;flex:1;min-height:0;overflow-y:auto}.card-rule-title{font-size:1.05rem;font-weight:700;color:var(--text)}.card-rule-block{display:flex;flex-direction:column;gap:4px}.card-rule-text{background:#f0f4f8;border-radius:var(--radius-sm);padding:12px 14px;font-size:.95rem;font-weight:600;color:var(--text);white-space:pre-line;line-height:1.6}.card-rule-translation{font-size:.8rem;color:var(--text-secondary);white-space:pre-line;line-height:1.5;padding:6px 10px;background:#f8fafc;border-radius:8px;font-style:italic}.card-rule-note{font-size:.8rem;color:var(--text-secondary);white-space:pre-line;line-height:1.4}.card-rule-example{background:#f8fafc;border-left:3px solid var(--success);border-radius:8px;padding:8px 12px;font-size:.88rem;color:var(--text);white-space:pre-line;line-height:1.5}.card-rule-example-row{display:flex;align-items:flex-start;gap:8px}.card-grammar-question{display:flex;flex-direction:column;gap:10px;flex:1;min-height:0}.card-question-text{font-size:1rem;font-weight:600;color:var(--text);line-height:1.4}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.option-btn{background:#f1f5f9;border:2px solid transparent;border-radius:var(--radius-sm);padding:14px 10px;font-size:.9rem;font-weight:500;cursor:pointer;text-align:center;transition:all .15s;font-family:inherit;color:var(--text);min-height:52px;-webkit-tap-highlight-color:transparent}.option-btn:active:not(:disabled){transform:scale(.96)}.option-btn.correct{background:#d1fae5;border-color:var(--success);color:#065f46}.option-btn.wrong{background:#fee2e2;border-color:var(--danger);color:#991b1b}.option-btn:disabled{cursor:default}.answer-feedback{background:#f8fafc;border-radius:var(--radius-sm);padding:10px 12px;font-size:.82rem;color:#475569;white-space:pre-line;line-height:1.5;border-left:3px solid var(--primary)}.rule-reminder{background:#fffbeb;border-radius:var(--radius-sm);padding:8px 12px;font-size:.78rem;color:#92400e;white-space:pre-line;line-height:1.5;border-left:3px solid var(--warning)}.card-phrase-front{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;gap:10px;text-align:center}.card-phrase-native{font-size:1.5rem;font-weight:700;color:var(--text);line-height:1.3}.card-phrase-back{display:flex;flex-direction:column;gap:10px;flex:1;min-height:0;overflow-y:auto}.card-phrase-target{font-size:1.5rem;font-weight:700;color:#7c3aed;line-height:1.3}.card-phrase-context{font-size:.8rem;color:var(--text-muted);font-style:italic}.done{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;gap:16px;padding:32px 24px;text-align:center}.done-emoji{font-size:3.5rem}.done-title{font-size:1.5rem;font-weight:700}.done-sub{color:var(--text-secondary);font-size:.88rem;max-width:260px}.done-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%}.done-actions{display:flex;flex-direction:column;gap:10px;width:100%;padding-top:4px}.browse{display:flex;flex-direction:column;height:100%;overflow:hidden}.browse-header{display:flex;align-items:center;gap:10px;padding:12px 16px 8px;flex-shrink:0}.browse-title{font-size:1.05rem;font-weight:700}.filter-tabs{display:flex;gap:6px;padding:0 16px 10px;overflow-x:auto;flex-shrink:0;-webkit-overflow-scrolling:touch;scrollbar-width:none}.filter-tabs::-webkit-scrollbar{display:none}.filter-tab{background:var(--border);border:none;border-radius:99px;padding:7px 14px;font-size:.8rem;font-weight:500;cursor:pointer;white-space:nowrap;font-family:inherit;color:var(--text-secondary);transition:all .15s;-webkit-tap-highlight-color:transparent;min-height:34px}.filter-tab.active{background:var(--primary);color:#fff}.browse-list{flex:1;display:flex;flex-direction:column;gap:6px;overflow-y:auto;padding:0 16px 16px;-webkit-overflow-scrolling:touch}.browse-item{background:var(--surface);border-radius:14px;padding:12px 14px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 1px 3px #0000000f;flex-shrink:0}.browse-item-left{display:flex;flex-direction:column;gap:3px;min-width:0}.browse-item-front{font-weight:600;font-size:.92rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.browse-item-back{font-size:.78rem;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.browse-item-right{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0;margin-left:8px}.browse-item-due{font-size:.68rem;color:var(--text-muted)}.speak-btn{background:var(--primary-light);border:none;cursor:pointer;padding:8px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;min-width:38px;min-height:38px;color:var(--primary);-webkit-tap-highlight-color:transparent;transition:background .15s,transform .1s;flex-shrink:0}.speak-btn:active:not(:disabled){background:#c7d2fe;transform:scale(.9)}.speak-btn.speaking{background:#fee2e2;color:#dc2626}.speak-btn-sm{min-width:30px;min-height:30px;padding:5px}.speak-btn-disabled{opacity:.3;cursor:not-allowed}@keyframes pulse{0%{opacity:1}to{opacity:.4}}.addcards-screen{display:flex;flex-direction:column;height:100%;overflow:hidden}.addcards-header{display:flex;align-items:center;gap:10px;padding:12px 16px;flex-shrink:0}.addcards-title{font-size:1.05rem;font-weight:700}.addcards-body{flex:1;overflow-y:auto;padding:0 16px 16px;-webkit-overflow-scrolling:touch}.addcards-form{display:flex;flex-direction:column;gap:12px}.addcards-label{font-size:.82rem;color:var(--text-secondary);font-weight:500}.addcards-input-row{display:flex;gap:8px}.addcards-input{flex:1;border:2px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;font-size:.95rem;font-family:inherit;color:var(--text);outline:none;background:var(--surface);transition:border-color .15s;-webkit-appearance:none;min-height:48px}.addcards-input:focus{border-color:var(--primary)}.addcards-input:disabled{background:#f8fafc;color:var(--text-muted)}.btn-generate{background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);padding:12px 16px;font-size:.9rem;font-weight:600;cursor:pointer;font-family:inherit;white-space:nowrap;transition:background .15s;-webkit-tap-highlight-color:transparent;min-height:48px}.btn-generate:active:not(:disabled){background:var(--primary-dark)}.btn-generate:disabled{background:#c7d2fe;cursor:not-allowed}.addcards-count-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.addcards-count-btns{display:flex;gap:6px}.addcards-examples{display:flex;flex-wrap:wrap;gap:6px}.addcards-error{background:#fee2e2;border-radius:var(--radius-sm);padding:10px 14px;font-size:.85rem;color:#991b1b}.addcards-preview{display:flex;flex-direction:column;gap:10px}.addcards-preview-title{font-size:.85rem;font-weight:600;color:#475569}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.card{animation:fadeUp .22s ease}.home-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%}.home-grid-btn{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);padding:14px 10px;font-size:1.3rem;cursor:pointer;font-family:inherit;display:flex;flex-direction:column;align-items:center;gap:4px;-webkit-tap-highlight-color:transparent;transition:all .15s}.home-grid-btn span{font-size:.72rem;font-weight:600;color:var(--text-secondary);text-align:center}.home-grid-btn:active{background:var(--border);transform:scale(.97)}.screen-header{display:flex;align-items:center;gap:10px;padding:12px 16px;flex-shrink:0}.screen-title{font-size:1.05rem;font-weight:700;flex:1}.done-freeze{font-size:.8rem;color:#155e75;background:#cffafe;border-radius:99px;padding:6px 14px;font-weight:600}.browse-search-wrap{padding:0 16px 8px;flex-shrink:0}.browse-search-input{width:100%;border:2px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;font-size:.92rem;font-family:inherit;background:var(--surface);color:var(--text);outline:none;-webkit-appearance:none;min-height:44px;transition:border-color .15s}.browse-search-input:focus{border-color:var(--primary)}.browse-hard-btn{background:none;border:none;cursor:pointer;font-size:.9rem;padding:2px 4px;-webkit-tap-highlight-color:transparent;opacity:.7}.browse-hard-btn:active{opacity:1}.listen-screen{display:flex;flex-direction:column;height:100%}.listen-counter{font-size:.8rem;color:var(--text-muted);font-weight:500}.listen-modes{display:flex;gap:8px;padding:0 16px 12px;flex-shrink:0}.listen-mode-btn{flex:1;background:var(--border);border:2px solid transparent;border-radius:var(--radius-sm);padding:10px 6px;cursor:pointer;font-family:inherit;display:flex;flex-direction:column;align-items:center;gap:2px;transition:all .15s;-webkit-tap-highlight-color:transparent}.listen-mode-btn.active{background:var(--primary-light);border-color:var(--primary)}.listen-mode-label{font-size:.8rem;font-weight:700;color:var(--text)}.listen-mode-desc{font-size:.65rem;color:var(--text-muted)}.listen-card{flex:1;background:var(--surface);margin:0 16px;border-radius:var(--radius-lg);box-shadow:0 4px 20px #00000014;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:28px 24px;min-height:0}.listen-word{font-size:2.2rem;font-weight:700;color:var(--primary);text-align:center;line-height:1.2}.listen-translation{font-size:1.2rem;color:var(--text-secondary);text-align:center;font-style:italic}.btn-show-translation{background:var(--primary-light);color:var(--primary);border:none;border-radius:var(--radius-sm);padding:10px 20px;font-size:.88rem;font-weight:600;cursor:pointer;font-family:inherit;-webkit-tap-highlight-color:transparent}.listen-play-btn{background:var(--primary);color:#fff;border:none;border-radius:50%;width:56px;height:56px;font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-tap-highlight-color:transparent;transition:transform .1s}.listen-play-btn:active{transform:scale(.92)}.listen-play-btn.playing{background:var(--text-muted)}.listen-controls{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;flex-shrink:0;gap:12px}.listen-nav-btn{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-sm);padding:12px 20px;font-size:1.1rem;cursor:pointer;-webkit-tap-highlight-color:transparent;min-height:48px;min-width:64px;transition:all .15s}.listen-nav-btn:disabled{opacity:.3}.listen-nav-btn:active:not(:disabled){background:var(--border)}.listen-auto-btn{flex:1;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);padding:12px 16px;font-size:.9rem;font-weight:600;cursor:pointer;font-family:inherit;-webkit-tap-highlight-color:transparent;min-height:48px;transition:all .15s}.listen-auto-btn:active{background:var(--primary-dark)}.listen-progress-wrap{height:4px;background:var(--border);flex-shrink:0}.listen-progress-fill{height:100%;background:var(--primary);transition:width .3s ease}.topics-screen{display:flex;flex-direction:column;height:100%}.topics-list{flex:1;overflow-y:auto;padding:0 16px 16px;display:flex;flex-direction:column;gap:10px;-webkit-overflow-scrolling:touch}.topic-item{background:var(--surface);border-radius:var(--radius);padding:14px 16px;box-shadow:0 1px 4px #0000000f;display:flex;flex-direction:column;gap:8px}.topic-header{display:flex;justify-content:space-between;align-items:center}.topic-name{font-weight:600;font-size:.92rem}.topic-pct{font-weight:700;font-size:.92rem;color:var(--primary)}.topic-bar-wrap{height:6px;background:var(--border);border-radius:99px;overflow:hidden}.topic-bar-fill{height:100%;background:var(--primary);border-radius:99px;transition:width .5s ease}.topic-stats{display:flex;gap:12px;font-size:.72rem;color:var(--text-muted)}.topic-hard{color:#f59e0b;font-weight:600}.mistakes-screen{display:flex;flex-direction:column;height:100%}.mistakes-list{flex:1;overflow-y:auto;padding:0 16px 16px;display:flex;flex-direction:column;gap:8px;-webkit-overflow-scrolling:touch}.mistake-item{background:var(--surface);border-radius:var(--radius);padding:12px 16px;box-shadow:0 1px 4px #0000000f;border-left:3px solid var(--danger);display:flex;flex-direction:column;gap:3px}.mistake-target{font-weight:700;font-size:1rem;color:var(--primary)}.mistake-translation{font-size:.82rem;color:var(--text-secondary)}.mistake-date{font-size:.68rem;color:var(--text-muted);margin-top:2px}.mistakes-empty{flex:1;display:flex;align-items:center;justify-content:center;font-size:1rem;color:var(--text-muted)}.dark-toggle-btn{background:none;border:none;font-size:1.2rem;cursor:pointer;padding:4px 6px;border-radius:8px;-webkit-tap-highlight-color:transparent;line-height:1}.dark-toggle-btn:active{background:var(--border)}.dark{--text: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--bg: #0f172a;--surface: #1e293b;--border: #334155;--primary-light: #1e1b4b}.dark body{background:var(--bg)}@media (prefers-color-scheme: dark){:root:not(.dark):not(.light){--text: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--bg: #0f172a;--surface: #1e293b;--border: #334155;--primary-light: #1e1b4b}body{background:var(--bg)}}.dark .browse-search-input,.dark .addcards-input{background:var(--surface);color:var(--text)}.dark .option-btn{background:#334155;color:var(--text)}.dark .card-rule-text,.dark .card-example,.dark .card-rule-example,.dark .answer-feedback{background:#1e293b}.dark .home-grid-btn,.dark .card,.dark .stat-card,.dark .browse-item,.dark .topic-item,.dark .mistake-item,.dark .listen-card,.dark .btn-back{background:var(--surface)}.content-filter-body{padding:1rem;max-width:800px;margin:0 auto}.filter-section{margin-bottom:2rem}.filter-section 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