:root{--bg: #09090f;--bg2: #0f0f18;--bg3: #17172a;--card: #111120;--card2: #181830;--card3: #1e1e38;--p1: #7b5ea7;--p2: #4facfe;--grad: linear-gradient(135deg, #7b5ea7 0%, #4facfe 100%);--grad-soft: linear-gradient(135deg, rgba(123,94,167,.18) 0%, rgba(79,172,254,.1) 100%);--blue: #4facfe;--purple: #7b5ea7;--green: #00e676;--orange: #ffab40;--red: #ff5252;--yellow: #ffd740;--text: #eeeeff;--text2: #8888aa;--text3: #44445a;--border: rgba(255,255,255,.07);--border2: rgba(255,255,255,.12);--nav-h: 70px;--safe-bottom: env(safe-area-inset-bottom, 0px);--radius: 18px;--radius-sm: 12px;--radius-xs: 8px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Inter,Segoe UI,sans-serif;font-size:16px;line-height:1.45;overflow-x:hidden;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;min-height:100%;padding-bottom:calc(var(--nav-h) + var(--safe-bottom))}.page{flex:1;padding:18px 16px 12px;max-width:480px;margin:0 auto;width:100%}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--nav-h) + var(--safe-bottom));padding-bottom:var(--safe-bottom);z-index:100;display:flex;align-items:flex-start;justify-content:center}.nav-inner{display:flex;align-items:center;justify-content:space-around;width:100%;max-width:480px;height:var(--nav-h);background:#0e0e1ae0;backdrop-filter:blur(24px) saturate(1.8);-webkit-backdrop-filter:blur(24px) saturate(1.8);border-top:1px solid var(--border2);padding:0 12px}.nav-item{display:flex;flex-direction:column;align-items:center;gap:5px;padding:10px 24px;border-radius:16px;text-decoration:none;color:var(--text3);transition:color .25s,background .25s;cursor:pointer;position:relative}.nav-item.active{color:var(--blue);background:#4facfe1a}.nav-icon{display:flex;align-items:center;justify-content:center;transition:transform .25s cubic-bezier(.34,1.56,.64,1)}.nav-item.active .nav-icon{transform:scale(1.15)}.nav-label{font-size:10px;font-weight:600;letter-spacing:.4px;text-transform:uppercase}.page-header{display:flex;align-items:center;gap:12px;margin-bottom:22px}.back-btn{width:38px;height:38px;border-radius:50%;border:1px solid var(--border2);background:var(--card);color:var(--text);font-size:17px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s,transform .15s}.back-btn:active{transform:scale(.9);background:var(--card2)}.page-title{font-size:22px;font-weight:700;letter-spacing:-.3px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.card+.card{margin-top:12px}.book-card{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;align-items:flex-start;gap:16px;cursor:pointer;transition:transform .18s,border-color .18s,box-shadow .18s;text-decoration:none;color:inherit;margin-bottom:14px;overflow:hidden}.book-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--grad-soft);opacity:0;transition:opacity .2s}.book-card:active{transform:scale(.984);border-color:#4facfe4d;box-shadow:0 0 0 1px #4facfe33,0 8px 32px #4facfe14}.book-card:active:before{opacity:1}.book-emoji{font-size:46px;line-height:1;filter:drop-shadow(0 4px 8px rgba(0,0,0,.4));position:relative;z-index:1}.book-info{flex:1;min-width:0;position:relative;z-index:1}.book-info h2{font-size:16px;font-weight:700;margin-bottom:5px;letter-spacing:-.2px}.book-info p{font-size:13px;color:var(--text2);margin-bottom:13px;line-height:1.35}.book-meta{display:flex;gap:10px;font-size:12px;color:var(--text2);flex-wrap:wrap;margin-bottom:13px}.book-meta span{display:flex;align-items:center;gap:4px;background:var(--bg3);padding:3px 8px;border-radius:20px}.progress-bar-wrap{height:5px;background:var(--bg3);border-radius:3px;overflow:hidden;margin-top:8px}.progress-bar-fill{height:100%;background:var(--grad);border-radius:3px;transition:width .5s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.progress-bar-fill:after{content:"";position:absolute;top:0;left:-100%;right:0;bottom:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);animation:shimmer 2s infinite}@keyframes shimmer{to{left:200%}}.unit-grid{display:grid;grid-template-columns:1fr 1fr;gap:11px}.unit-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:transform .18s,border-color .2s,box-shadow .2s;position:relative;text-align:left;color:inherit;overflow:hidden}.unit-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--grad-soft);opacity:0;transition:opacity .2s}.unit-card:active{transform:scale(.96);border-color:#7b5ea766}.unit-card:active:before{opacity:1}.unit-card.done{border-color:#00e67659;background:linear-gradient(135deg,rgba(0,230,118,.06) 0%,var(--card) 100%)}.unit-number{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:4px;position:relative;z-index:1}.unit-preview{font-size:12px;color:var(--text2);margin-bottom:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;position:relative;z-index:1}.unit-progress-row{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text2);position:relative;z-index:1}.unit-done-badge{position:absolute;top:10px;right:10px;font-size:16px;z-index:2;filter:drop-shadow(0 0 6px rgba(0,230,118,.6))}.word-list{display:flex;flex-direction:column;gap:8px}.word-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;display:flex;align-items:center;gap:13px;transition:border-color .2s}.word-texts{flex:1;min-width:0}.word-english{font-size:15px;font-weight:600;letter-spacing:-.1px}.word-uzbek{font-size:13px;color:var(--text2);margin-top:2px}.word-actions{display:flex;gap:7px}.word-btn{width:36px;height:36px;border-radius:50%;border:none;cursor:pointer;font-size:15px;display:flex;align-items:center;justify-content:center;transition:transform .15s,background .2s;background:var(--bg3)}.word-btn:active{transform:scale(.88)}.word-btn.known{background:#00e67626;box-shadow:0 0 12px #00e67633}.word-btn.hard{background:#ffab4026;box-shadow:0 0 12px #ffab4033}.speak-btn{color:var(--text2)}.speak-btn.active{background:#4facfe26;color:var(--blue);box-shadow:0 0 12px #4facfe33;animation:pulse-speak .8s ease-in-out infinite alternate}@keyframes pulse-speak{0%{box-shadow:0 0 6px #4facfe33}to{box-shadow:0 0 16px #4facfe80}}.status-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;background:var(--text3)}.status-dot.known{background:var(--green);box-shadow:0 0 6px #00e67680}.status-dot.hard{background:var(--orange);box-shadow:0 0 6px #ffab4080}.stat-strip{display:flex;gap:8px;margin-bottom:16px}.stat-chip{flex:1;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 8px;text-align:center}.stat-chip-val{font-size:20px;font-weight:800;letter-spacing:-.5px}.stat-chip-lbl{font-size:10px;color:var(--text2);margin-top:2px;letter-spacing:.2px}.btn{border:none;border-radius:var(--radius-sm);padding:15px 24px;font-size:15px;font-weight:600;cursor:pointer;width:100%;transition:opacity .15s,transform .15s,box-shadow .2s;font-family:inherit;letter-spacing:-.1px}.btn:active{transform:scale(.975);opacity:.88}.btn-primary{background:var(--grad);color:#fff;box-shadow:0 4px 20px #7b5ea759}.btn-primary:active{box-shadow:0 2px 10px #7b5ea740}.btn-secondary{background:var(--bg3);border:1px solid var(--border2);color:var(--text)}.btn-success{background:linear-gradient(135deg,#00e676,#00b09b);color:#000;box-shadow:0 4px 20px #00e6764d}.btn-danger{background:#ff52521f;border:1px solid rgba(255,82,82,.2);color:var(--red)}.mode-picker{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin-bottom:24px}.mode-btn{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 12px;text-align:center;cursor:pointer;color:inherit;transition:all .18s;font-family:inherit}.mode-btn:active{transform:scale(.96)}.mode-btn.selected{border-color:var(--purple);background:linear-gradient(135deg,#7b5ea726,#4facfe14);box-shadow:0 0 0 1px #7b5ea74d}.mode-btn .mode-icon{font-size:28px;display:block;margin-bottom:7px}.mode-btn .mode-label{font-size:13px;font-weight:700}.mode-btn .mode-desc{font-size:11px;color:var(--text2);margin-top:3px}.practice-header{margin-bottom:20px}.practice-progress{height:5px;background:var(--bg3);border-radius:3px;overflow:hidden;margin-bottom:8px}.practice-progress-fill{height:100%;background:var(--grad);border-radius:3px;transition:width .35s cubic-bezier(.4,0,.2,1)}.practice-counter{font-size:13px;color:var(--text2);text-align:center}.flashcard-scene{perspective:1200px;margin:0 auto 24px;max-width:360px}.flashcard{width:100%;aspect-ratio:4/3;position:relative;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.4,0,.2,1);cursor:pointer}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;backface-visibility:hidden;-webkit-backface-visibility:hidden;padding:28px 24px;text-align:center}.flashcard-front{background:var(--card);border:1px solid rgba(79,172,254,.3);box-shadow:0 16px 40px #00000080,inset 0 1px #ffffff0f}.flashcard-back{background:var(--card2);border:1px solid rgba(0,230,118,.3);box-shadow:0 16px 40px #00000080,inset 0 1px #ffffff0f;transform:rotateY(180deg)}.flashcard-word{font-size:34px;font-weight:800;letter-spacing:-.5px;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.flashcard-hint{font-size:13px;color:var(--text2);margin-top:10px}.flashcard-meaning{font-size:22px;font-weight:700;color:var(--green);text-shadow:0 0 20px rgba(0,230,118,.3)}.flashcard-tap{font-size:12px;color:var(--text3);margin-top:10px}.flashcard-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.fc-btn{flex:1;min-width:90px;max-width:130px;border:none;border-radius:16px;padding:14px 8px;font-size:14px;font-weight:700;cursor:pointer;transition:transform .15s,box-shadow .15s;display:flex;flex-direction:column;align-items:center;gap:4px;font-family:inherit}.fc-btn:active{transform:scale(.93)}.fc-btn.known{background:#00e67626;color:var(--green);box-shadow:0 4px 16px #00e67626}.fc-btn.hard{background:#ffab4026;color:var(--orange);box-shadow:0 4px 16px #ffab4026}.fc-btn.skip{background:var(--bg3);color:var(--text2)}.fc-btn .btn-icon{font-size:22px}.mc-question{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:30px 20px;text-align:center;margin-bottom:20px;position:relative;overflow:hidden}.mc-question:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad)}.mc-word{font-size:32px;font-weight:800;letter-spacing:-.5px;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.mc-subtitle{font-size:13px;color:var(--text2);margin-top:6px}.mc-options{display:flex;flex-direction:column;gap:10px}.mc-option{background:var(--card);border:1px solid var(--border2);border-radius:var(--radius-sm);padding:16px 18px;font-size:15px;font-weight:500;cursor:pointer;text-align:left;color:inherit;transition:all .15s;font-family:inherit}.mc-option:active:not(.correct):not(.wrong){background:var(--card2);border-color:#4facfe4d}.mc-option.correct{border-color:var(--green);background:#00e67614;color:var(--green);box-shadow:0 0 0 1px #00e67633}.mc-option.wrong{border-color:var(--red);background:#ff525214;color:var(--red)}.matching-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:16px}.match-btn{background:var(--card);border:1px solid var(--border2);border-radius:var(--radius-sm);padding:14px 10px;font-size:13px;font-weight:600;cursor:pointer;color:inherit;text-align:center;transition:all .15s;word-break:break-word;line-height:1.3;font-family:inherit}.match-btn:active:not(.matched){transform:scale(.96)}.match-btn.selected{border-color:var(--blue);background:#4facfe1a;box-shadow:0 0 0 1px #4facfe40,0 4px 14px #4facfe1a}.match-btn.matched{border-color:#00e67666;background:#00e67612;color:var(--green);opacity:.7;cursor:default}.match-btn.error{border-color:var(--red);animation:shake .35s}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-7px)}60%{transform:translate(7px)}}.matching-score{text-align:center;font-size:14px;color:var(--text2);margin-bottom:12px}.type-question{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:30px 20px;text-align:center;margin-bottom:20px;position:relative;overflow:hidden}.type-question:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(135deg,#ffd740,#ffab40)}.type-prompt{font-size:13px;color:var(--text2);margin-bottom:10px}.type-word{font-size:28px;font-weight:800;letter-spacing:-.4px;color:var(--yellow);text-shadow:0 0 24px rgba(255,215,64,.3)}.type-input-wrap{display:flex;gap:10px;margin-bottom:12px}.type-input{flex:1;background:var(--card);border:1px solid var(--border2);border-radius:var(--radius-sm);padding:14px 16px;font-size:16px;color:var(--text);font-family:inherit;outline:none;transition:border-color .2s,box-shadow .2s}.type-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #4facfe1f}.type-input.correct{border-color:var(--green);box-shadow:0 0 0 3px #00e6761a}.type-input.wrong{border-color:var(--red);box-shadow:0 0 0 3px #ff52521a}.type-submit{background:var(--grad);color:#fff;border:none;border-radius:var(--radius-sm);padding:14px 20px;font-size:15px;font-weight:700;cursor:pointer;transition:opacity .15s,transform .15s;font-family:inherit;box-shadow:0 4px 16px #7b5ea74d}.type-submit:active{opacity:.82;transform:scale(.96)}.type-feedback{text-align:center;font-size:15px;font-weight:600;padding:11px;border-radius:var(--radius-sm);margin-bottom:12px}.type-feedback.correct{background:#00e6761a;color:var(--green);border:1px solid rgba(0,230,118,.2)}.type-feedback.wrong{background:#ff52521a;color:var(--red);border:1px solid rgba(255,82,82,.2)}.end-screen{text-align:center;padding:32px 16px}.end-icon{font-size:72px;margin-bottom:18px;filter:drop-shadow(0 8px 24px rgba(0,0,0,.4))}.end-title{font-size:26px;font-weight:800;margin-bottom:8px;letter-spacing:-.4px}.end-subtitle{font-size:16px;color:var(--text2);margin-bottom:32px}.end-stats{display:flex;justify-content:center;gap:28px;margin-bottom:32px}.end-stat-val{font-size:36px;font-weight:800;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-1px}.end-stat-lbl{font-size:13px;color:var(--text2);margin-top:2px}.end-actions{display:flex;flex-direction:column;gap:10px;max-width:280px;margin:0 auto}.dash-cards{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-bottom:24px}.dash-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 8px;text-align:center;position:relative;overflow:hidden}.dash-card:before{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--grad);opacity:.6}.dash-val{font-size:26px;font-weight:800;letter-spacing:-.5px}.dash-lbl{font-size:10px;color:var(--text2);margin-top:4px;line-height:1.3;letter-spacing:.2px}.section-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text3);margin-bottom:12px}.book-progress-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;margin-bottom:9px}.book-progress-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.book-progress-name{font-size:14px;font-weight:600}.book-progress-pct{font-size:13px;font-weight:700;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hard-word-item{background:var(--card);border:1px solid var(--border);border-left:2px solid var(--orange);border-radius:var(--radius-sm);padding:14px 16px;display:flex;align-items:center;gap:13px;margin-bottom:8px}.hard-word-texts{flex:1}.hard-word-english{font-size:15px;font-weight:600}.hard-word-uzbek{font-size:13px;color:var(--text2);margin-top:2px}.hard-word-unit{font-size:11px;color:var(--text3);margin-top:4px}.remove-btn{width:32px;height:32px;border-radius:50%;border:none;background:#ff52521f;color:var(--red);cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s,transform .15s}.remove-btn:active{transform:scale(.88);background:#ff525238}.empty-state{text-align:center;padding:56px 24px;color:var(--text2)}.empty-icon{font-size:52px;margin-bottom:14px;filter:grayscale(.3)}.empty-text{font-size:17px;font-weight:700;margin-bottom:7px;color:var(--text);letter-spacing:-.2px}.empty-sub{font-size:14px;line-height:1.5}.loading{display:flex;align-items:center;justify-content:center;min-height:220px;color:var(--text2);font-size:14px;flex-direction:column;gap:14px}.spinner{width:30px;height:30px;border:2.5px solid var(--bg3);border-top-color:var(--blue);border-right-color:var(--purple);border-radius:50%;animation:spin .75s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;bottom:calc(var(--nav-h) + var(--safe-bottom) + 18px);left:50%;transform:translate(-50%);background:var(--card2);border:1px solid var(--border2);color:var(--text);padding:12px 22px;border-radius:30px;font-size:14px;font-weight:600;z-index:200;animation:toastIn .3s cubic-bezier(.34,1.56,.64,1),toastOut .3s ease 1.7s forwards;white-space:nowrap;box-shadow:0 8px 32px #00000080;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(14px) scale(.9)}to{opacity:1;transform:translate(-50%) translateY(0) scale(1)}}@keyframes toastOut{0%{opacity:1}to{opacity:0}}::-webkit-scrollbar{width:3px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:2px}