@import"https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Outfit:wght@500;600;700;800&display=swap";body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}:root{--primary-color: #4f46e5;--primary-light: #eef2ff;--primary-dark: #3730a3;--secondary-color: #10b981;--accent-gold: #f59e0b;--accent-sky: #0ea5e9;--text-dark: #0f172a;--text-light: #ffffff;--text-muted: #64748b;--background-color: #f8fafc;--card-bg: #ffffff;--card-border: #e2e8f0;--success-color: #10b981;--error-color: #ef4444;--border-radius: 12px;--border-radius-lg: 16px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .05), 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .04);--shadow-card: 0 4px 12px rgba(15, 23, 42, .05);--shadow-card-hover: 0 12px 24px rgba(79, 70, 229, .12);--transition-speed: .25s;--font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-heading: "Outfit", "Plus Jakarta Sans", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--background-color);color:var(--text-dark);line-height:1.6}.app{display:flex;flex-direction:column;min-height:100vh}.App{text-align:center}header{background:linear-gradient(135deg,#312e81,#4338ca 45%,#4f46e5);color:var(--text-light);padding:1rem 1rem .75rem;text-align:center;box-shadow:0 4px 20px #312e812e;border-bottom:1px solid rgba(255,255,255,.08)}.App-header{background-color:#1e1b4b;min-height:20vh;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:calc(10px + 2vmin);color:#fff;position:relative}.install-button{background:linear-gradient(135deg,#10b981,#059669);border:none;color:#fff;padding:8px 16px;font-size:.9rem;font-weight:600;cursor:pointer;border-radius:8px;white-space:nowrap;flex-shrink:0;box-shadow:0 2px 6px #10b9814d;transition:transform .2s,box-shadow .2s}.install-button:hover{transform:translateY(-1px);box-shadow:0 4px 10px #10b98166}header h1{font-family:var(--font-heading);font-size:2.2rem;margin-bottom:.5rem;font-weight:800;display:flex;align-items:center;gap:.5rem;letter-spacing:-.02em}.english-emblem{width:1.3em;height:auto;border-radius:50%;box-shadow:0 2px 8px #00000040;flex-shrink:0;transition:transform .25s ease}header h1:hover .english-emblem{transform:rotate(-8deg) scale(1.08)}main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:20px;scroll-margin-top:80px;scroll-padding-top:80px}footer{background-color:var(--primary-dark);color:var(--text-light);text-align:center;padding:1.2rem;margin-top:2rem;position:relative;z-index:10}.footer-link{color:#93c5fd;text-decoration:none;font-weight:500;transition:color .2s}.footer-link:hover{color:#fff;text-decoration:underline}.header-content{display:flex;align-items:center;justify-content:space-between;padding:0 1rem;position:relative}.menu-toggle{display:none;background:transparent;border:none;color:#fff;font-size:1.5rem;cursor:pointer;transition:transform .3s;z-index:1100;padding:8px}.menu-toggle:hover{transform:scale(1.1)}.menu-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;z-index:900;animation:fadeIn .3s ease}.navigation{display:flex;justify-content:center;align-items:center;margin-top:.75rem;margin-bottom:.5rem;padding:0 1rem}.navigation ul{display:inline-flex;align-items:center;justify-content:center;gap:4px;background:#0f172a61;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.12);border-radius:9999px;padding:5px;box-shadow:inset 0 2px 4px #00000040,0 4px 12px #0f172a33;list-style-type:none;flex-wrap:wrap}.navigation li{padding:.55rem 1.35rem;cursor:pointer;border-radius:9999px;color:#ffffffc7;font-family:var(--font-heading);font-size:.92rem;font-weight:600;letter-spacing:-.01em;transition:all .2s cubic-bezier(.16,1,.3,1);position:relative;z-index:1;-webkit-user-select:none;user-select:none;border:1px solid transparent}.navigation li:hover{color:#fff;background-color:#ffffff24;transform:translateY(-1px)}.navigation li:active{transform:scale(.97)}.navigation li.active{background:#fff;color:#1e1b4b;font-weight:700;box-shadow:0 4px 14px #00000038,0 1px 3px #0000001a;border-color:#fff9;transform:translateY(0)}.navigation li.active:after{display:none}.section{margin-bottom:3rem;animation:fadeIn .5s ease-in;scroll-margin-top:80px;min-height:calc(100vh - 200px)}.section h2{font-family:var(--font-heading);color:#1e1b4b;margin-bottom:1.5rem;font-size:2.2rem;font-weight:800;position:relative;padding-bottom:.8rem;text-align:center;scroll-margin-top:80px;letter-spacing:-.02em}.section h2:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%);width:72px;height:4px;background:linear-gradient(to right,#4f46e5,#0ea5e9);border-radius:4px}.alphabet-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem}.alphabet-card{background-color:var(--card-bg);border-radius:var(--border-radius-lg);padding:1.6rem 1.4rem;box-shadow:var(--shadow-card);transition:transform var(--transition-speed),box-shadow var(--transition-speed),border-color var(--transition-speed);display:flex;flex-direction:column;border:1px solid var(--card-border);position:relative;min-height:250px}.alphabet-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:#c7d2fe}.letter-container{position:relative;display:flex;flex-direction:column;align-items:center;margin-bottom:.75rem;width:100%}.letter-header{display:flex;align-items:center;justify-content:center;position:relative;width:100%}.letter-pair{display:flex;flex-direction:row;align-items:center;gap:8px;position:relative}.letter-uppercase,.letter-lowercase{font-size:2.8rem;color:var(--primary-color);font-weight:700;font-family:var(--font-family)}.letter-lowercase{font-size:2.4rem}.letter-underline{width:80px;height:4px;margin:.5rem auto .25rem;background:linear-gradient(to right,var(--primary-color),var(--secondary-color));border-radius:2px;position:relative}.pronunciation-button-wrapper{position:absolute;right:0;top:50%;transform:translateY(-50%)}.alphabet-card .letter{font-size:2.8rem;color:var(--primary-color);font-weight:700;margin-right:.5rem}.alphabet-card .pronunciation{color:var(--text-dark);margin-bottom:.8rem;font-weight:500;font-size:.95rem;line-height:1.4}.alphabet-card .pronunciation strong{margin-right:4px}.alphabet-card .pronunciation-text{font-weight:400}.alphabet-card .example{margin-top:auto;padding-top:.85rem;border-top:1px solid rgba(0,0,0,.06);display:flex;align-items:center;gap:.75rem}.example-icon-badge{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;font-size:1.85rem;line-height:1;background:linear-gradient(135deg,#6366f117,#a855f717);border:1px solid rgba(99,102,241,.16);border-radius:12px;flex-shrink:0;cursor:pointer;-webkit-user-select:none;user-select:none;transition:transform .22s cubic-bezier(.34,1.56,.64,1),box-shadow .22s ease,background .2s ease;box-shadow:0 2px 6px #6366f114}.example-icon-badge:hover{transform:scale(1.15) rotate(-3deg);box-shadow:0 6px 14px #6366f133;background:linear-gradient(135deg,#6366f129,#a855f729)}.example-icon-badge:active{transform:scale(.95)}.example-details{display:flex;flex-direction:column;gap:.2rem;flex:1;min-width:0}.example-word-row{display:flex;align-items:center;gap:6px;flex-wrap:nowrap}.example-word-row strong{margin-right:2px;color:var(--text-dark);font-size:.9rem}.alphabet-card .example-word{font-weight:700;font-style:normal;color:var(--primary-dark);font-size:1.05rem}.alphabet-card .example-translation{font-size:.82rem;color:var(--text-muted);font-style:normal;line-height:1.35}.letter-pronunciation{margin-left:.5rem}.example-pronunciation{margin-left:2px}.phrases-header-section{display:flex;flex-direction:column;align-items:center;text-align:center;margin-bottom:2rem;width:100%}.phrases-header-section h2{margin-bottom:1rem;width:100%}.phrases-subtitle{font-size:1rem;color:#64748b;margin:.25rem 0 1rem;text-align:center;max-width:650px}.phrases-toggle-container{display:flex;justify-content:center;width:100%}.study-toggle-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.55rem 1.15rem;border-radius:999px;background-color:var(--card-bg);border:1.5px solid var(--primary-color);color:var(--primary-color);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s cubic-bezier(.34,1.56,.64,1);box-shadow:0 2px 6px #4a5af414}.study-toggle-btn:hover{background-color:var(--primary-light);transform:translateY(-2px);box-shadow:0 4px 10px #4a5af42e}.study-toggle-btn:active{transform:scale(.97)}.toggle-btn-icon{font-size:.85rem;transition:transform .3s ease}.toggle-btn-icon.rotated{transform:rotate(180deg)}.phrases-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.2rem}.phrase-card{background-color:var(--card-bg);border-radius:var(--border-radius);padding:1.5rem;box-shadow:var(--shadow-sm);transition:transform var(--transition-speed),box-shadow var(--transition-speed),border-color .25s ease;min-height:160px;display:flex;flex-direction:column;border:1px solid rgba(0,0,0,.06);position:relative;overflow:hidden;perspective:1000px}.phrase-card:before{content:"";position:absolute;top:0;left:0;width:5px;height:100%;background-color:var(--primary-color);opacity:.7;transition:opacity .2s ease}.phrase-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.phrase-card.phrase-revealed{border-color:#4a5af440;box-shadow:0 4px 14px #4a5af417}.phrase-card.phrase-revealed:before{opacity:1}.phrase-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem;gap:.5rem}.phrase-title-group{display:flex;align-items:center;gap:.65rem;flex:1;min-width:0}.phrase-icon-badge{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;font-size:1.4rem;background:linear-gradient(135deg,#6366f114,#a855f714);border:1px solid rgba(99,102,241,.14);border-radius:10px;flex-shrink:0;-webkit-user-select:none;user-select:none;transition:transform .2s cubic-bezier(.34,1.56,.64,1)}.phrase-card:hover .phrase-icon-badge{transform:scale(1.12)}.phrase-card .russian{font-size:1.5rem;color:var(--primary-dark);font-weight:700;flex:1}.phrase-content{flex:1;display:flex;flex-direction:column}.phrase-reveal-btn{margin-top:auto;width:100%;display:inline-flex;align-items:center;justify-content:center;gap:.55rem;padding:.75rem 1rem;border-radius:12px;background:linear-gradient(135deg,var(--primary-light) 0%,rgba(238,240,255,.6) 100%);border:1.5px dashed var(--primary-color);color:var(--primary-color);font-size:.95rem;font-weight:600;cursor:pointer;transition:all .22s cubic-bezier(.34,1.56,.64,1);box-shadow:0 2px 6px #4a5af40f}.phrase-reveal-btn:hover{background:var(--primary-color);color:#fff;border-style:solid;transform:translateY(-2px) scale(1.02);box-shadow:0 4px 12px #4a5af438}.phrase-reveal-btn:active{transform:scale(.97)}.phrase-reveal-btn .cue-icon{font-size:.85rem;transition:transform .3s ease}.phrase-reveal-btn:hover .cue-icon{transform:rotate(180deg)}.phrase-revealed-wrap{flex:1;display:flex;flex-direction:column;justify-content:space-between;cursor:pointer;animation:cardFlipIn .32s cubic-bezier(.34,1.56,.64,1) forwards;transform-origin:top center;border-radius:8px;padding:.2rem 0}.phrase-revealed-wrap:focus-visible{outline:2px solid var(--primary-color);outline-offset:2px}@keyframes cardFlipIn{0%{opacity:0;transform:perspective(400px) rotateX(-20deg) translateY(6px)}to{opacity:1;transform:perspective(400px) rotateX(0) translateY(0)}}.phrase-revealed-body{margin-bottom:.5rem}.phrase-card .english{color:var(--text-dark);font-size:1.1rem;font-weight:600;margin-bottom:.4rem}.phrase-card .pronunciation{color:#4b5563;font-size:.95rem;line-height:1.4}.phrase-card .pronunciation-label{font-weight:600;color:#64748b;margin-right:.25rem}.card-hide-cue{margin-top:auto;padding-top:.6rem;display:inline-flex;align-items:center;gap:.35rem;font-size:.78rem;font-weight:500;color:#94a3b8;transition:all .2s ease}.phrase-revealed-wrap:hover .card-hide-cue{color:var(--primary-color)}.cue-icon.mini{font-size:.7rem}.phrase-pronunciation{margin-left:.5rem}.quiz-section{max-width:600px;margin:0 auto}.quiz-header-panel{background-color:var(--card-bg);border-radius:var(--border-radius);padding:1rem 1.25rem;margin-bottom:1.25rem;box-shadow:var(--shadow-sm);border:1px solid rgba(0,0,0,.06);display:flex;flex-direction:column;gap:.65rem}.quiz-progress-bar-container{width:100%;height:6px;background-color:#4a5af41f;border-radius:10px;overflow:hidden;margin-bottom:.15rem}.quiz-progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));border-radius:10px;transition:width .4s ease}.quiz-top-bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem}.session-progress-counter{display:flex;align-items:baseline;gap:5px}.counter-label{font-size:.85rem;font-weight:600;color:var(--text-muted)}.counter-current{font-size:1.4rem;font-weight:800;color:var(--primary-color);line-height:1}.counter-total{font-size:.95rem;font-weight:600;color:var(--text-muted)}.session-score-badge{font-size:.9rem;font-weight:700;color:var(--primary-dark)}.quiz-goal-selector{display:flex;align-items:center;gap:5px}.goal-label{font-size:.85rem;font-weight:600;color:var(--text-muted);margin-right:2px}.goal-pill{background-color:var(--primary-light);color:var(--primary-dark);border:1px solid rgba(74,90,244,.2);border-radius:20px;padding:3px 10px;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .2s ease}.goal-pill:hover{background-color:#4a5af433;transform:translateY(-1px)}.goal-pill.active{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color);box-shadow:0 2px 6px #4a5af44d}.curriculum-pool-badge{font-size:.82rem;background-color:#ffc1071f;color:#b78103;border:1px solid rgba(255,193,7,.35);border-radius:20px;padding:3px 10px;display:inline-flex;align-items:center;gap:5px;font-weight:500;width:fit-content}.curriculum-pool-badge .pool-icon{font-size:.95rem}.curriculum-pool-badge strong{font-weight:700;color:#8c6000}.pool-remaining-tag{font-size:.78rem;opacity:.85}.quiz-feedback-drawer{position:fixed;bottom:0;left:0;right:0;z-index:1200;box-shadow:0 -8px 30px #0000002e;animation:slideUpFeedback .28s cubic-bezier(.16,1,.3,1) forwards;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1.25rem 1.5rem calc(1.25rem + env(safe-area-inset-bottom,12px))}@keyframes slideUpFeedback{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.quiz-feedback-drawer.feedback-correct{background-color:#f0fdf4;border-top:3px solid #10b981}.quiz-feedback-drawer.feedback-incorrect{background-color:#fef2f2;border-top:3px solid #ef4444}.feedback-drawer-inner{max-width:600px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}.feedback-info-area{display:flex;justify-content:space-between;align-items:center;gap:1rem}.feedback-header-row{display:flex;align-items:flex-start;gap:.85rem}.feedback-icon{font-size:1.85rem;flex-shrink:0;margin-top:2px}.feedback-icon.correct-icon{color:#10b981;animation:bounceIn .5s cubic-bezier(.34,1.56,.64,1)}.feedback-icon.incorrect-icon{color:#ef4444}.feedback-text-content{display:flex;flex-direction:column;gap:.2rem}.feedback-title{margin:0;font-size:1.3rem;font-weight:800;line-height:1.2}.feedback-correct .feedback-title{color:#065f46}.feedback-incorrect .feedback-title{color:#991b1b}.feedback-answer-line{font-size:.95rem;color:#7f1d1d}.feedback-correct-word{color:#991b1b;font-weight:700;text-decoration:underline;text-underline-offset:3px}.feedback-audio-action{flex-shrink:0}.feedback-pronounce-btn{background:#0000000d;border-radius:50%;padding:6px}.feedback-action-area{width:100%}.feedback-continue-button{width:100%;padding:.85rem 1.4rem;border:none;border-radius:12px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:1.05rem;font-weight:700;transition:all .2s cubic-bezier(.34,1.56,.64,1);box-shadow:0 4px 14px #0000001f}.feedback-continue-button.btn-next-correct{background:linear-gradient(135deg,#10b981,#059669);color:#fff}.feedback-continue-button.btn-next-correct:hover{background:linear-gradient(135deg,#059669,#047857);transform:translateY(-2px);box-shadow:0 6px 18px 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ease}.recap-header{margin-bottom:1.2rem}.recap-title-row{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:.25rem}.recap-icon-inline{display:inline-flex;align-items:center;justify-content:center;font-size:2.2rem}.recap-icon{font-size:2.4rem;margin-bottom:.5rem;display:inline-block;animation:bounceIn .8s ease}.recap-icon.gold{color:#ffc107}.recap-icon.silver{color:#6c757d}.recap-icon.bronze{color:#cd7f32}.recap-icon.practice{color:var(--primary-color)}.recap-russian-title{font-size:1.8rem;color:var(--primary-dark);margin:0;font-weight:800}.recap-subtitle-row{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;font-size:.95rem;color:var(--text-muted)}.recap-separator{color:#cbd5e1}.recap-pronunciation{font-size:.95rem;color:var(--text-muted);margin:0;font-weight:500}.recap-pronunciation .pronunciation-text{font-weight:700;color:var(--primary-color)}.recap-english-subtitle{color:var(--text-muted);font-size:.95rem;margin:0;line-height:1.4}.recap-score-display{background:linear-gradient(180deg,#4a5af40a,#4a5af414);border-radius:var(--border-radius);padding:1.25rem;margin-bottom:1.25rem;border:1px solid rgba(74,90,244,.12)}.recap-score-main{display:flex;align-items:baseline;justify-content:center;gap:10px;margin-bottom:.75rem}.recap-score-percent{font-size:2.8rem;font-weight:900;color:var(--primary-dark);line-height:1}.recap-score-ratio{font-size:1.05rem;color:var(--text-muted);font-weight:600}.recap-stats-row{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:1rem}.recap-stat-pill{background-color:var(--card-bg);border:1px solid rgba(0,0,0,.08);border-radius:12px;padding:8px 14px;display:flex;flex-direction:column;align-items:center;min-width:90px;box-shadow:var(--shadow-sm)}.recap-stat-pill.correct{border-color:#28a7454d}.recap-stat-pill.correct .stat-value{color:var(--success-color)}.recap-stat-pill.highlight{border-color:#ffc10780;background-color:#ffc1070f}.recap-stat-pill.highlight .stat-value{color:#8c6000}.recap-stat-pill.pool-left .stat-value{color:var(--primary-color)}.recap-stat-pill .stat-label{font-size:.72rem;color:var(--text-muted);font-weight:700;text-transform:uppercase;letter-spacing:.5px;white-space:nowrap}.recap-stat-pill .stat-value{font-size:1.05rem;font-weight:700;margin-top:2px;white-space:nowrap}.recap-save-notice{font-size:.85rem;color:var(--success-color);font-weight:600;margin:0;display:inline-flex;align-items:center;gap:6px}.recap-save-notice .notice-icon{font-size:.95rem}.recap-missed-section{text-align:left;background-color:#dc354508;border:1px solid rgba(220,53,69,.15);border-radius:var(--border-radius);padding:1.25rem;margin-bottom:1.5rem}.recap-missed-section h4{margin:0 0 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