:root{--safe-top: 0px;--safe-right: 0px;--safe-bottom: 0px;--safe-left: 0px;--content-safe-top: 0px;--content-safe-right: 0px;--content-safe-bottom: 0px;--content-safe-left: 0px;--viewport: 100vh;--accent-1: #7c5cff;--accent-2: #00c2ff;--accent-grad: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);--radius-sm: 10px;--radius: 16px;--radius-lg: 22px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .06);--shadow: 0 6px 24px rgba(20, 12, 60, .1);--shadow-lg: 0 14px 40px rgba(20, 12, 60, .18);--ease: cubic-bezier(.4, 0, .2, 1)}:root[data-scheme=light]{--bg: var(--tg-bg-color, #ffffff);--bg-soft: var(--tg-secondary-bg-color, #f4f5f8);--bg-elev: #ffffff;--text: var(--tg-text-color, #0c0c14);--text-dim: var(--tg-hint-color, #7a7e88);--text-on-accent: #ffffff;--border: rgba(14, 12, 40, .06);--user-bubble: var(--accent-grad);--user-bubble-text: #ffffff;--asst-bubble: #f1f2f6;--asst-bubble-text: #0c0c14;--danger: #e04f4f}:root[data-scheme=dark]{--bg: var(--tg-bg-color, #0e0f14);--bg-soft: var(--tg-secondary-bg-color, #1a1b22);--bg-elev: #181a22;--text: var(--tg-text-color, #f4f5f8);--text-dim: var(--tg-hint-color, #8f929c);--text-on-accent: #ffffff;--border: rgba(255, 255, 255, .08);--user-bubble: var(--accent-grad);--user-bubble-text: #ffffff;--asst-bubble: #24262f;--asst-bubble-text: #f4f5f8;--danger: #ff6b6b}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;min-height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Inter,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.4;-webkit-font-smoothing:antialiased;overscroll-behavior:none}body{background:radial-gradient(1200px 400px at 50% -10%,color-mix(in oklab,var(--accent-1) 12%,transparent),transparent 60%),var(--bg)}input,button,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}.screen{display:flex;flex-direction:column;width:100%;max-width:720px;margin:0 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var(--border);margin-bottom:12px;flex-shrink:0}.screen--chat{height:var(--viewport);max-height:var(--viewport);overflow:hidden}.topbar-title{font-weight:600;font-size:15px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-sub{font-size:12px;color:var(--text-dim)}.icon-pill{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--bg-soft);border:none;color:var(--text);flex-shrink:0;transition:background .18s var(--ease)}.icon-pill:active{background:color-mix(in oklab,var(--bg-soft) 80%,var(--text) 20%)}.cta-exam{width:100%;padding:18px 20px;border-radius:var(--radius);background:var(--accent-grad);color:var(--text-on-accent);border:none;text-align:left;margin-bottom:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:4px;transition:transform .15s var(--ease),box-shadow .15s var(--ease)}.cta-exam:active{transform:translateY(1px);box-shadow:var(--shadow-sm)}.cta-exam-title{font-size:17px;font-weight:700;letter-spacing:-.005em}.cta-exam-sub{font-size:13px;opacity:.92}.tabs{display:flex;gap:2px;background:var(--bg-soft);padding:4px;border-radius:12px;margin-bottom:16px}.tab{flex:1;text-align:center;padding:10px 6px;font-size:13px;font-weight:600;border-radius:9px;background:transparent;border:none;color:var(--text-dim);transition:all .2s var(--ease)}.tab.active{background:var(--bg-elev);color:var(--text);box-shadow:var(--shadow-sm)}.scenarios{display:flex;flex-direction:column;gap:8px}.scenario-card{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:var(--bg-soft);border-radius:var(--radius);border:1px solid var(--border);width:100%;text-align:left;transition:transform .15s var(--ease),background .15s var(--ease)}.scenario-card:active{transform:scale(.985);background:color-mix(in oklab,var(--bg-soft) 75%,var(--accent-1) 8%)}.scenario-title{font-size:15px;font-weight:600;margin-bottom:2px}.scenario-sub{color:var(--text-dim);font-size:12.5px}.scenario-arrow{color:var(--text-dim);font-size:18px;flex-shrink:0}.chat-messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:4px 0 12px;-webkit-overflow-scrolling:touch}.chat-group{display:flex;flex-direction:column;gap:4px}.msg{max-width:84%;padding:10px 13px;border-radius:18px;line-height:1.4;font-size:15.5px;white-space:pre-wrap;word-wrap:break-word;animation:msg-in .22s var(--ease)}@keyframes msg-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.msg.user{align-self:flex-end;background:var(--user-bubble);color:var(--user-bubble-text);border-bottom-right-radius:6px;box-shadow:var(--shadow-sm)}.msg.assistant{align-self:flex-start;background:var(--asst-bubble);color:var(--asst-bubble-text);border-bottom-left-radius:6px}.msg 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typing{0%,60%,to{opacity:.25;transform:translateY(0)}30%{opacity:1;transform:translateY(-2px)}}.input-row{display:flex;align-items:flex-end;gap:8px;padding:10px 0 calc(var(--safe-bottom) + var(--content-safe-bottom) + 10px);background:linear-gradient(to top,var(--bg) 70%,transparent);position:sticky;bottom:0}.text-input{flex:1;min-height:42px;max-height:140px;padding:10px 14px;border-radius:22px;border:1px solid var(--border);background:var(--bg-soft);color:var(--text);font-size:15px;line-height:1.35;resize:none;outline:none;transition:border-color .15s var(--ease)}.text-input:focus{border-color:color-mix(in oklab,var(--accent-1) 40%,transparent)}.icon-btn{width:42px;height:42px;border-radius:50%;border:none;background:var(--accent-grad);color:#fff;font-size:18px;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:var(--shadow-sm);transition:transform .12s var(--ease)}.icon-btn:active{transform:scale(.92)}.icon-btn.ghost{background:var(--bg-soft);color:var(--text);box-shadow:none;border:1px solid var(--border)}.icon-btn.danger{background:var(--danger);color:#fff}.rec-bar{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:22px;background:var(--bg-soft);border:1px solid var(--border);flex:1;min-height:42px}.rec-dot{width:10px;height:10px;border-radius:50%;background:var(--danger);animation:rec-pulse 1s infinite var(--ease);flex-shrink:0}@keyframes rec-pulse{0%,to{opacity:1;transform:scale(1);box-shadow:0 0 color-mix(in oklab,var(--danger) 50%,transparent)}50%{opacity:.85;transform:scale(1.1);box-shadow:0 0 0 8px transparent}}.rec-time{font-variant-numeric:tabular-nums;font-size:14px;font-weight:600;color:var(--text);min-width:42px}.rec-meter{flex:1;display:flex;align-items:center;gap:3px;height:26px}.rec-meter span{flex:1;background:var(--text-dim);border-radius:2px;min-height:4px;opacity:.35;transition:height .06s linear,opacity .06s linear,background .12s var(--ease)}.rec-meter span.active{background:var(--accent-1);opacity:1}.review-card{padding:12px;background:var(--bg-soft);border:1px solid color-mix(in oklab,var(--accent-2) 25%,transparent);border-radius:var(--radius-sm);margin-bottom:10px;display:flex;flex-direction:column;gap:10px}.review-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-dim)}.review-text{width:100%;border:none;background:transparent;color:var(--text);font-size:15.5px;line-height:1.4;resize:none;min-height:50px;outline:none}.review-actions{display:flex;gap:8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 18px;border-radius:12px;background:var(--accent-grad);color:#fff;border:none;font-weight:600;font-size:14.5px;box-shadow:var(--shadow-sm);transition:transform .12s var(--ease)}.btn:active{transform:scale(.97)}.btn.ghost{background:var(--bg-soft);color:var(--text);border:1px solid var(--border);box-shadow:none}.btn.danger{background:transparent;color:var(--danger);border:1px solid color-mix(in oklab,var(--danger) 50%,transparent);box-shadow:none}.btn-block{width:100%}.report{display:flex;flex-direction:column;gap:12px}.report-card{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px}.report-card h3{margin:0 0 10px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-dim)}.report-score{font-size:48px;font-weight:800;text-align:center;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;letter-spacing:-.02em}.report-score-max{color:var(--text-dim);font-size:18px;font-weight:500}.phrase-item{padding:10px 0;border-top:1px solid var(--border);font-size:14px}.phrase-item:first-child{border-top:none;padding-top:0}.phrase-said{color:var(--danger);text-decoration:line-through;opacity:.85}.phrase-better{color:color-mix(in oklab,var(--accent-1) 50%,var(--text));font-weight:600;margin-top:2px}.phrase-note{color:var(--text-dim);font-size:12.5px;margin-top:3px}.toast{position:fixed;left:50%;top:calc(var(--safe-top) + var(--content-safe-top) + 16px);transform:translate(-50%);background:var(--danger);color:#fff;padding:10px 16px;border-radius:100px;font-size:13px;font-weight:600;box-shadow:var(--shadow-lg);z-index:100;animation:toast-in .2s var(--ease);max-width:calc(100% - 32px)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,-6px)}to{opacity:1;transform:translate(-50%)}}.chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.chip{font-size:11px;padding:4px 10px;border-radius:100px;background:var(--bg-soft);color:var(--text-dim);border:1px solid var(--border)}.chip-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-dim);margin-right:2px;align-self:center}.spacer{flex:1}.loader{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-dim);font-size:14px}.resume-banner{display:flex;align-items:center;gap:10px;padding:12px 14px;margin-bottom:12px;border-radius:var(--radius);background:color-mix(in oklab,var(--accent-2) 10%,var(--bg-soft));border:1px solid color-mix(in oklab,var(--accent-2) 30%,transparent)}.resume-main{flex:1;min-width:0}.resume-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;color:var(--text-dim)}.resume-topic{font-size:14px;font-weight:600;margin-top:2px}.resume-actions{display:flex;gap:6px;flex-shrink:0}.home-heading{display:flex;align-items:center;gap:14px;margin:4px 0 16px}.lv-flag{display:inline-flex;flex-direction:column;width:40px;height:28px;border-radius:5px;overflow:hidden;flex-shrink:0;box-shadow:0 1px 3px #00000026}.lv-flag>span{display:block;width:100%}.lv-flag>span:nth-child(1){height:40%;background:#9e3039}.lv-flag>span:nth-child(2){height:20%;background:#fff}.lv-flag>span:nth-child(3){height:40%;background:#9e3039}.streak-card{padding:16px 18px;border-radius:var(--radius);background:var(--bg-soft);border:1px solid var(--border);margin-bottom:16px;display:flex;flex-direction:column;gap:10px}.streak-main{display:flex;align-items:center;gap:12px}.streak-fire{font-size:34px;line-height:1}.streak-number{font-size:26px;font-weight:800;line-height:1;letter-spacing:-.01em;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}.streak-label{font-size:13px;color:var(--text-dim);margin-top:2px}.progress-label{font-size:13px;color:var(--text-dim)}.progress-bar{width:100%;height:8px;border-radius:100px;background:color-mix(in oklab,var(--bg) 40%,var(--bg-soft));overflow:hidden}.progress-fill{height:100%;background:var(--accent-grad);border-radius:inherit;transition:width .4s var(--ease)}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}.mode-card{position:relative;overflow:hidden;padding:16px 16px 14px;background:var(--bg-soft);border:1px solid var(--border);border-radius:18px;text-align:left;display:flex;flex-direction:column;gap:2px;min-height:124px;transition:transform .12s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);isolation:isolate}.mode-card:before{content:"";position:absolute;top:-40px;right:-40px;width:130px;height:130px;border-radius:50%;background:var(--card-accent);opacity:.18;filter:blur(28px);z-index:-1}.mode-card:active{transform:scale(.97);box-shadow:0 4px 20px color-mix(in oklab,var(--card-accent) 25%,transparent)}[data-scheme=dark] .mode-card{background:color-mix(in oklab,var(--bg-soft) 88%,var(--card-accent) 4%)}.mode-icon{font-size:22px;line-height:1;width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:color-mix(in oklab,var(--card-accent) 18%,var(--bg));border:1px solid color-mix(in oklab,var(--card-accent) 30%,transparent);margin-bottom:12px;flex-shrink:0;align-self:flex-start}.mode-title{font-weight:700;font-size:16px;letter-spacing:-.005em;line-height:1.2}.mode-sub{font-size:12.5px;color:var(--text-dim);line-height:1.35;margin-top:2px}.mode-card[data-accent=blue]{--card-accent: #3b82f6}.mode-card[data-accent=purple]{--card-accent: #8b5cf6}.mode-card[data-accent=green]{--card-accent: #10b981}.mode-card[data-accent=orange]{--card-accent: #f59e0b}.links-row{display:flex;justify-content:center;gap:18px;margin-top:auto;padding-top:16px}.text-link{color:var(--text-dim);text-decoration:none;font-size:14px;font-weight:500}.text-link:active{color:var(--accent-1)}.empty{padding:24px 16px;text-align:center;color:var(--text-dim);font-size:14px;line-height:1.45}.vocab-card{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius)}.vocab-main{flex:1;min-width:0}.vocab-word{font-weight:700;font-size:16px}.vocab-trans{color:var(--text-dim);font-size:13.5px;margin-top:2px}.vocab-example{font-size:13px;color:var(--text-dim);margin-top:6px;font-style:italic}.vocab-actions{display:flex;gap:6px}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:12px}.stat-tile{padding:14px 8px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);text-align:center}.stat-num{font-size:22px;font-weight:800;letter-spacing:-.01em}.stat-label{font-size:11px;color:var(--text-dim);margin-top:2px;text-transform:uppercase;letter-spacing:.4px}.calendar{display:grid;grid-template-columns:repeat(15,1fr);gap:4px;margin-bottom:6px}.cal-cell{aspect-ratio:1;background:var(--accent-1);border-radius:3px}.cal-legend{display:flex;justify-content:space-between;font-size:11px;color:var(--text-dim)}.topic-row{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:13px}.topic-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topic-bar{flex:1.5;height:6px;background:var(--border);border-radius:100px;overflow:hidden}.topic-bar-fill{height:100%;background:var(--accent-grad);border-radius:inherit}.topic-count{width:48px;text-align:right;color:var(--text-dim);font-size:12px}.prep-timer{display:flex;align-items:center;gap:14px;padding:14px 18px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px}.prep-timer-num{font-size:40px;font-weight:800;letter-spacing:-.02em;background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;min-width:60px}.prep-timer-label{font-size:13px;color:var(--text-dim)}.prep-chunk{padding:10px 0;border-top:1px solid var(--border)}.prep-chunk:first-child{border-top:none;padding-top:0}.prep-chunk-lv{font-size:15.5px;font-weight:600;display:flex;align-items:center;gap:8px}.prep-chunk-ru{color:var(--text-dim);font-size:13.5px;margin-top:3px}.picture-wrap{border-radius:var(--radius);overflow:hidden;margin-bottom:12px;background:var(--bg-soft);border:1px solid var(--border)}.picture-img{width:100%;height:220px;object-fit:cover;display:block}.history-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.history-item{display:flex;flex-direction:column;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}.history-img{width:100%;aspect-ratio:1;object-fit:cover;cursor:pointer;display:block;transition:opacity .15s var(--ease)}.history-img:active{opacity:.75}.history-caption{display:flex;align-items:center;gap:6px;padding:8px 10px}.history-title{flex:1;font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.picture-skeleton-img{background:linear-gradient(90deg,var(--bg-soft) 0%,color-mix(in oklab,var(--bg-soft) 50%,var(--accent-1) 10%) 50%,var(--bg-soft) 100%);background-size:200% 100%;animation:skeleton-shimmer 1.6s infinite;display:flex;align-items:center;justify-content:center;color:var(--text-dim);font-size:14px}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.picture-prompt{padding:10px 14px;font-size:13px;color:var(--text-dim);line-height:1.4;background:var(--bg-soft)}.tr-card{padding:14px 16px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px}.tr-card--result{background:color-mix(in oklab,var(--accent-1) 8%,var(--bg-soft));border-color:color-mix(in oklab,var(--accent-1) 25%,transparent)}.tr-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-dim);margin-bottom:8px;display:flex;align-items:center;gap:8px}.tr-chip{display:inline-block;padding:2px 8px;border-radius:100px;background:var(--bg);color:var(--text-dim);font-size:10px;font-weight:700;letter-spacing:.6px;border:1px solid var(--border)}.tr-chip--accent{background:var(--accent-grad);color:#fff;border-color:transparent}.tr-textarea{width:100%;min-height:80px;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:16px;line-height:1.45;resize:none;outline:none;font-family:inherit;transition:border-color .15s var(--ease)}.tr-textarea:focus{border-color:color-mix(in oklab,var(--accent-1) 40%,transparent)}.tr-translation{font-size:18px;font-weight:500;line-height:1.45;white-space:pre-wrap;word-wrap:break-word}.last-run-badge{font-size:12px;font-weight:700;padding:4px 8px;border-radius:100px;background:color-mix(in oklab,var(--accent-1) 15%,var(--bg-soft));color:var(--accent-1);flex-shrink:0}.runs-list{display:flex;flex-direction:column;gap:6px}.run-row{display:flex;align-items:center;gap:10px;font-size:13px}.run-index{width:56px;color:var(--text-dim);font-size:12px;flex-shrink:0}.run-bar{flex:1;height:8px;background:var(--border);border-radius:100px;overflow:hidden}.run-bar-fill{height:100%;background:var(--accent-grad);border-radius:inherit;transition:width .3s var(--ease)}.run-score{width:64px;text-align:right;font-variant-numeric:tabular-nums;font-weight:600}.flashcard{perspective:1000px;min-height:280px;cursor:pointer;-webkit-user-select:none;user-select:none}.flashcard-inner{position:relative;width:100%;min-height:280px;transform-style:preserve-3d;transition:transform .5s var(--ease)}.flashcard--flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{position:absolute;top:0;right:0;bottom:0;left:0;min-height:280px;border-radius:var(--radius);padding:24px 20px;display:flex;flex-direction:column;align-items:center;justify-content:center;backface-visibility:hidden;-webkit-backface-visibility:hidden;text-align:center}.flashcard-front{background:var(--bg-soft);border:1px solid var(--border)}.flashcard-back{background:var(--accent-grad);color:#fff;transform:rotateY(180deg);box-shadow:var(--shadow)}.flashcard-label{font-size:11px;font-weight:700;letter-spacing:1px;opacity:.7;margin-bottom:14px}.flashcard-text{font-size:24px;font-weight:700;line-height:1.3;letter-spacing:-.01em}.flashcard-hint{font-size:13px;opacity:.75;margin-top:14px;line-height:1.4}.flashcard-back .flashcard-hint{opacity:.9}.presets{display:flex;gap:6px;padding:6px 0 2px;overflow-x:auto;scrollbar-width:none}.presets::-webkit-scrollbar{display:none}.preset-chip{flex-shrink:0;padding:7px 12px;border-radius:100px;background:var(--bg-soft);border:1px solid var(--border);color:var(--text);font-size:13px;font-weight:500;transition:all .12s var(--ease);white-space:nowrap}.preset-chip:active:not(:disabled){background:color-mix(in oklab,var(--accent-1) 15%,var(--bg-soft));border-color:color-mix(in oklab,var(--accent-1) 40%,transparent)}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:90;animation:fade-in .18s var(--ease)}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.sheet{position:fixed;left:0;right:0;bottom:0;z-index:95;background:var(--bg);border-top-left-radius:20px;border-top-right-radius:20px;padding:16px 16px calc(var(--safe-bottom) + var(--content-safe-bottom) + 16px);box-shadow:var(--shadow-lg);animation:sheet-in .24s var(--ease)}@keyframes sheet-in{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sheet-handle{width:40px;height:4px;background:var(--text-dim);opacity:.4;border-radius:100px;margin:-6px auto 12px}.sheet h3{margin:0 0 12px;font-size:16px;font-weight:700}.sheet-input{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--bg-soft);color:var(--text);font-size:15px;margin-bottom:10px}.sheet-row{display:flex;gap:8px;margin-top:12px}