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:root{--bg:#fff8ef;--card:#fff;--ink:#2d2a4a;--muted:#6f6b8f;--line:#ece6f7;--primary:#6c5ce7;--primary-dark:#5443d6;--primary-soft:#efecff;--sun:#fdcb6e;--sun-soft:#fff4d6;--sky-soft:#e3f2ff;--good:#00a884;--good-soft:#dcf7ef;--bad:#e1574c;--bad-soft:#fde8e6;--radius:20px;--shadow:0 6px 24px #4c3ca014;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:var(--font-nunito), "Segoe UI", system-ui, sans-serif;-webkit-font-smoothing:antialiased;font-size:18px;line-height:1.6}h1,h2,h3{margin:0 0 .5em;line-height:1.25}h1{font-size:2rem;font-weight:900}h2{font-size:1.4rem;font-weight:800}h3{font-size:1.1rem;font-weight:800}p{margin:0 0 .8em}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}:focus-visible{outline:3px solid var(--sun);outline-offset:2px}.app{min-height:100vh}.topbar{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);background:#fff8efeb;justify-content:space-between;align-items:center;gap:12px;padding:12px 20px;display:flex;position:sticky;top:0}.brand{color:var(--primary);background:0 0;border:0;padding:4px 0;font-size:1.3rem;font-weight:900}.main{max-width:820px;margin:0 auto;padding:28px 16px 80px}.main.narrow{max-width:440px;padding-top:12vh}.stack{flex-direction:column;gap:20px;display:flex}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.hero p{color:var(--muted);font-size:1.15rem}.muted{color:var(--muted);font-size:.92em}.hint{color:var(--muted);font-size:.88rem}.center{text-align:center}.boot{place-items:center;min-height:80vh;font-size:4rem;animation:1.4s ease-in-out infinite bob;display:grid}.btn{border:2px solid var(--line);background:var(--card);border-radius:999px;justify-content:center;align-items:center;gap:6px;padding:10px 20px;font-weight:800;transition:transform .1s,background .15s,border-color .15s;display:inline-flex}.btn:hover:not(:disabled){border-color:var(--primary);transform:translateY(-1px)}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark);border-color:var(--primary-dark)}.btn-big{padding:14px 32px;font-size:1.15rem}.btn-small{padding:6px 14px;font-size:.9rem}.link-btn{color:var(--primary);text-underline-offset:3px;background:0 0;border:0;padding:6px 0;font-weight:700;text-decoration:underline}.actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:24px;display:flex}.actions.spread{justify-content:space-between}.about-row{grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px;display:grid}.field{flex-direction:column;gap:6px;font-size:.95rem;font-weight:700;display:flex}.field input,.field select,.unlock input,.paste-box{border:2px solid var(--line);background:#fff;border-radius:14px;width:100%;padding:10px 14px;font-weight:600}.field input:focus,.field select:focus,.unlock input:focus,.paste-box:focus{border-color:var(--primary);outline:none}.tabs{gap:8px;margin-bottom:14px;display:flex}.tab{border:2px solid var(--line);background:#fff;border-radius:14px;flex:1;padding:10px;font-weight:800}.tab.active{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-dark)}.dropzone{border-radius:var(--radius);text-align:center;cursor:pointer;background:#fbfaff;border:3px dashed #d6cff2;padding:28px 20px;transition:background .15s,border-color .15s}.dropzone:hover,.dropzone.dragging{border-color:var(--primary);background:var(--primary-soft)}.dropzone-icon{font-size:2.6rem}.dropzone p{margin:4px 0}.file-list{margin:12px 0 0;padding:0;list-style:none}.file-list li{background:var(--sky-soft);word-break:break-word;border-radius:12px;justify-content:space-between;align-items:center;gap:12px;margin-bottom:6px;padding:8px 14px;font-size:.95rem;display:flex}.paste-box{resize:vertical;min-height:200px;line-height:1.5}.study-list{margin:0;padding:0;list-style:none}.study-row{border-top:1px solid var(--line);align-items:center;gap:12px;display:flex}.study-row:first-child{border-top:0}.study-row-main{text-align:left;background:0 0;border:0;flex-direction:column;flex:1;padding:12px 0;display:flex}.study-row-main:hover .study-row-title{color:var(--primary)}.study-row-title{font-size:1.1rem;font-weight:800}.loading{text-align:center;padding:40px 0}.loading-mascot{font-size:3.5rem;animation:1.4s ease-in-out infinite bob}.loading-text{margin-top:8px;font-size:1.2rem;font-weight:800}.dots{justify-content:center;gap:8px;display:flex}.dots span{background:var(--primary);border-radius:50%;width:10px;height:10px;animation:1.2s ease-in-out infinite pulse}.dots span:nth-child(2){animation-delay:.2s}.dots span:nth-child(3){animation-delay:.4s}@keyframes bob{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{opacity:.25;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}.error-box{background:var(--bad-soft);border-radius:14px;align-items:flex-start;gap:12px;margin:16px 0;padding:14px 18px;display:flex}.error-box p{margin:0 0 6px;font-weight:700}.error-icon{font-size:1.6rem}.error-text{color:var(--bad);font-weight:700}.pill{background:var(--primary-soft);color:var(--primary-dark);border-radius:999px;margin-bottom:10px;padding:3px 12px;font-size:.85rem;font-weight:800;display:inline-block}.pill.small{margin:4px 0;font-size:.75rem}.overall{flex-direction:column;gap:6px;display:flex}.progress{background:var(--line);border-radius:999px;height:12px;overflow:hidden}.quiz-top .progress{flex:1}.progress-fill{background:linear-gradient(90deg, var(--primary), #a29bfe);border-radius:999px;height:100%;transition:width .3s}.section-list{flex-direction:column;gap:12px;margin:0;padding:0;list-style:none;display:flex}.section-card,.final-card{text-align:left;background:var(--card);border-radius:var(--radius);width:100%;box-shadow:var(--shadow);border:2px solid #0000;align-items:center;gap:16px;padding:18px 20px;transition:transform .1s,border-color .15s;display:flex}.section-card:hover,.final-card:hover{border-color:var(--primary);transform:translateY(-2px)}.final-card{background:linear-gradient(135deg, var(--sun-soft), #fff);border-color:var(--sun)}.section-emoji{background:var(--sun-soft);border-radius:16px;flex-shrink:0;place-items:center;width:56px;height:56px;font-size:2.2rem;display:grid}.section-emoji.big{border-radius:22px;width:76px;height:76px;font-size:2.8rem}.section-body{flex-direction:column;flex:1;min-width:0;display:flex}.section-title{font-size:1.15rem;font-weight:900}.section-goal{color:var(--muted);font-size:.95rem}.badge{white-space:nowrap;background:var(--line);border-radius:999px;padding:4px 12px;font-size:.85rem;font-weight:800;display:inline-block}.badge-good{background:var(--good-soft);color:var(--good)}.badge-start{background:var(--primary);color:#fff}.section-header{align-items:center;gap:18px;display:flex}.section-header h1{margin-bottom:2px}.section-header p{margin:0}.stepper{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.step{border:2px solid var(--line);background:var(--card);border-radius:16px;flex-direction:column;align-items:center;gap:2px;padding:10px 4px;font-size:.9rem;font-weight:800;display:flex}.step-icon{font-size:1.4rem}.step.done{border-color:var(--good-soft);background:var(--good-soft)}.step.active{border-color:var(--primary);background:var(--primary);color:#fff}.lesson p{font-size:1.08rem}.hook{color:var(--primary-dark);background:var(--primary-soft);border-radius:16px;padding:16px 20px;font-weight:800;font-size:1.3rem!important}.callout{border-radius:16px;margin:20px 0;padding:16px 20px}.callout p:last-child{margin-bottom:0}.callout-check{background:var(--sun-soft)}.callout-star{background:var(--sun-soft);border:2px solid var(--sun)}.callout-tip{background:var(--good-soft)}.check-answer{color:var(--good);background:#fff;border-radius:12px;padding:8px 14px;font-weight:800;display:inline-block}.terms{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin:0;display:grid}.term{border:2px solid var(--line);border-radius:14px;padding:12px 14px}.term dt{color:var(--primary-dark);font-weight:900}.term dd{margin:0;font-size:.98rem}.walk-top{justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.walk-top .pill{margin:0}.walk-dots{gap:6px;display:flex}.walk-dot{background:var(--line);border:0;border-radius:50%;width:14px;height:14px;padding:0}.walk-dot.done{background:#a29bfe}.walk-dot.active{background:var(--primary);transform:scale(1.25)}.checklist{padding:0;list-style:none}.checklist li{padding:8px 0 8px 36px;font-size:1.08rem;position:relative}.checklist li:before{content:"✅";position:absolute;left:0}.quiz-options{background:var(--bg);border-radius:16px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:20px;padding:10px 12px;display:flex}.level-picker{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.level-label{color:var(--muted);margin-right:2px;font-size:.9rem;font-weight:800}.level{border:2px solid var(--line);background:#fff;border-radius:999px;padding:4px 12px;font-size:.88rem;font-weight:800;transition:border-color .15s,background .15s}.level:hover:not(.active){border-color:#a29bfe}.level.active{background:var(--primary);border-color:var(--primary);color:#fff;cursor:default}.more-practice{border:2px dashed var(--line);border-radius:var(--radius);margin-top:28px;padding:18px 18px 6px}.more-practice h3{margin-bottom:2px}.more-practice .quiz-options{margin-bottom:12px}.quiz-top{align-items:center;gap:14px;margin-bottom:18px;display:flex}.quiz-top .muted{white-space:nowrap;font-weight:700}.question{margin-bottom:18px;font-size:1.35rem}.choices{flex-direction:column;gap:10px;display:flex}.choice{text-align:left;border:2px solid var(--line);background:#fff;border-radius:16px;align-items:center;gap:14px;padding:12px 16px;font-size:1.05rem;font-weight:700;transition:border-color .15s,background .15s;display:flex}.choice:hover{border-color:#a29bfe}.choice.selected{border-color:var(--primary);background:var(--primary-soft)}.choice-letter{background:var(--line);border-radius:50%;flex-shrink:0;place-items:center;width:36px;height:36px;font-weight:900;display:grid}.choice.selected .choice-letter{background:var(--primary);color:#fff}.score-card{text-align:center;background:linear-gradient(135deg, var(--primary-soft), var(--sun-soft));border-radius:var(--radius);margin-bottom:28px;padding:28px 20px}.score-emoji{font-size:3.5rem}.score{color:var(--primary-dark);font-size:3rem;font-weight:900;line-height:1.1}.stars{color:#f9b928;letter-spacing:4px;font-size:1.8rem}.stars-off{color:#e2dcf2}.score-card p{margin:8px 0 0;font-size:1.15rem;font-weight:700}.score-card .pill{background:#fff;margin:10px 0 0}.score-card p.muted{font-size:.9rem;font-weight:600}.review-list{flex-direction:column;gap:12px;margin:0;padding:0;list-style:none;display:flex}.review{border-left:6px solid;border-radius:16px;padding:14px 18px}.review.right{background:var(--good-soft);border-color:var(--good)}.review.wrong{background:var(--bad-soft);border-color:var(--bad)}.review-head{gap:10px;margin-bottom:6px;font-weight:800;display:flex}.review p{margin:4px 0;font-size:1rem}.your-answer{color:var(--bad);font-weight:700}.correct-answer{color:var(--good);font-weight:800}.why{color:var(--ink)}.unlock{text-align:center;flex-direction:column;align-items:center;gap:14px;display:flex}.unlock h1,.unlock p{margin:0}.unlock-mascot{font-size:3.5rem}@media (max-width:600px){body{font-size:17px}h1{font-size:1.6rem}.card{padding:20px 16px}.about-row{grid-template-columns:1fr}.step-label{font-size:.75rem}.section-card,.final-card{flex-wrap:wrap;padding:14px 16px}.section-status{width:100%;padding-left:72px}.section-emoji.big{width:60px;height:60px;font-size:2.2rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}