@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";
:root{--bg:#f8f7fc;--panel:#fff;--ink:#1e1b2e;--muted:#6b7280;--line:#e5e4ea;--primary:#8b5cf6;--primary-strong:#7c3aed;--secondary:#3b82f6;--tertiary:#f59e0b;--danger:#f43f5e;--success:#22c55e;--soft-purple:#f5f3ff;--soft-purple-2:#ede9fe;--soft-green:#dcfce7;--soft-blue:#dbeafe;--soft-orange:#fef3c7;--soft-red:#fee2e2;--shadow:0 2px 12px #00000014;--glow:0 0 20px #8b5cf626}.avatar-login-screen,.student-workspace{--bg:#0f0d13;--panel:#1a1725;--ink:#e8e4f0;--muted:#b0adc0;--line:#2a2636;--shadow:0 2px 12px #00000040;--soft-purple:#1e1a2e;--soft-purple-2:#251f3a;--soft-green:#0f2418;--soft-blue:#0f1a2e;--soft-orange:#1f1a0f;--soft-red:#1f0f0f}*{box-sizing:border-box}html{background:var(--bg)}body{background:var(--bg);color:var(--ink);margin:0;font-family:Inter,Segoe UI,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.5}.app-root{flex-direction:column;min-height:100vh;display:flex}.app-root-main{flex:1}.legal-footer{text-align:center;color:#94a3b8;margin-top:auto;padding:16px;font-size:.78rem;font-weight:700}.legal-footer p{max-width:820px;margin:0 auto}.avatar-login-screen{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.avatar-login-shell{gap:16px;width:min(440px,100%);animation:.4s both fadeInUp;display:grid}.avatar-hero{text-align:center}.avatar-main{border:4px solid;border-radius:50%;place-items:center;width:104px;height:104px;margin:0 auto 12px;transition:border-color .22s,background-color .22s,transform .22s;display:grid;overflow:hidden}.avatar-main:hover{transform:scale(1.03)}.avatar-hero h1{margin:0 0 4px;font-size:1.85rem;line-height:1;transition:color .22s}.avatar-hero p,.avatar-picker-label,.avatar-signup p{color:var(--muted);margin:0;font-weight:500}.avatar-login-card{border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow),var(--glow);border-radius:12px;gap:14px;padding:clamp(22px,5vw,28px);animation:.5s .1s both fadeInUp;display:grid}.avatar-picker-label{text-align:center;font-size:.86rem}.avatar-picker-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;display:grid}.avatar-option{min-height:86px;box-shadow:none;background:0 0;border:2px solid #0000;border-radius:10px;align-content:center;justify-items:center;gap:6px;padding:8px 4px;transition:transform .2s cubic-bezier(.4,0,.2,1),border-color .2s,background-color .2s,box-shadow .2s;display:grid}.avatar-option:hover:not(:disabled){transform:translateY(-2px)}.avatar-option span{border-radius:50%;place-items:center;width:48px;height:48px;display:grid;overflow:hidden}.avatar-option strong{font-size:.8rem}.avatar-login-field{color:#8791a3;gap:6px;font-size:.86rem}.avatar-login-field input{border-color:var(--line);text-align:center;box-shadow:none;background:var(--panel);color:var(--ink);border-radius:10px}.avatar-login-field input[type=text]{text-transform:uppercase;letter-spacing:.12em;min-height:62px;font-family:Courier New,monospace;font-size:1.3rem;font-weight:700}.avatar-login-submit{color:#fff;border:0;border-radius:10px;min-height:58px;font-size:1.12rem;transition:filter .2s,transform .2s,box-shadow .2s;box-shadow:0 4px 14px #0003}.avatar-login-submit:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-1px);box-shadow:0 6px 20px #0000004d}.avatar-login-error{text-align:center;margin:0}.avatar-signup{text-align:center;gap:3px;display:grid}.avatar-signup a,.avatar-family-access{font-weight:700;text-decoration:none}.avatar-login-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.avatar-login-stats div{border:1px solid var(--line);background:var(--panel);text-align:center;border-radius:10px;gap:2px;padding:12px 8px;display:grid}.avatar-login-stats span{color:var(--muted);font-size:.72rem;font-weight:600}.avatar-login-stats strong{font-size:1.1rem;line-height:1.1}.avatar-family-access{color:#7f77dd;text-align:center;font-size:.88rem}h1,h2,h3{font-family:Inter,Segoe UI,ui-sans-serif,system-ui,sans-serif;font-weight:700}button,input,select,textarea{font:inherit}button{border:1px solid var(--line);background:var(--panel);min-height:48px;color:var(--ink);cursor:pointer;border-radius:8px;padding:0 16px;font-weight:800}button:hover:not(:disabled){border-color:var(--primary);transform:translateY(-1px)}button:disabled{cursor:not-allowed;opacity:.5}input,select,textarea{border:2px solid var(--line);background:var(--panel);width:100%;min-height:54px;color:var(--ink);border-radius:8px;padding:14px 16px}input::placeholder,textarea::placeholder{color:var(--muted);opacity:.65}textarea{resize:vertical}input:focus,select:focus,textarea:focus{border-color:var(--primary);outline:3px solid #10b9812e}input[type=date]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;cursor:pointer}label{color:var(--muted);gap:8px;font-size:.92rem;font-weight:800;display:grid}label small{color:#94a3b8;font-size:.82rem;font-weight:750}.date-triplet{grid-template-columns:.8fr 1.2fr 1fr;gap:10px;display:grid}.app-shell{width:min(1180px,100% - 28px);margin:0 auto;padding:20px 0 40px}.login-screen{background:radial-gradient(circle at 18% 18%,#f3e8ffc7,transparent 34%),radial-gradient(circle at 82% 22%,#dbeafed1,transparent 30%),radial-gradient(circle at 50% 86%,#fce7f3bd,transparent 34%),var(--bg);place-items:center;min-height:100vh;padding:24px;display:grid}.login-shell{gap:22px;width:min(430px,100%);display:grid}.login-brand{text-align:center}.login-owl{color:#fff7ed;background:linear-gradient(145deg,#c58a4a,#a66f37);border:5px solid #8b5e34;border-radius:50%;place-items:center;width:86px;height:86px;margin:0 auto 12px;font-size:.86rem;font-weight:900;display:grid;box-shadow:0 18px 35px #92400e38}.login-brand h1{color:var(--ink);margin:0;font-size:clamp(2.5rem,12vw,4rem);line-height:1}.login-brand p,.login-help{color:var(--muted);text-align:center;margin:8px 0 0;font-weight:750}.login-card{box-shadow:var(--shadow);background:#fff;border:2px solid #eadcff;border-radius:24px;gap:18px;padding:clamp(24px,6vw,34px);display:grid}.login-card-standalone{width:min(430px,100%)}.login-card h1,.login-card h2{color:var(--ink);text-align:center;margin:0;font-size:clamp(1.6rem,7vw,2.15rem)}.login-code-field input{text-align:center;text-transform:uppercase;min-height:70px;color:var(--primary);letter-spacing:.08em;border-color:#d8b4fe;font-size:clamp(1.6rem,8vw,2.2rem);font-weight:900}.login-error{text-align:center;margin:0}.login-submit{min-height:60px;font-size:1.12rem}.family-access,.link-button{min-height:48px;color:var(--primary);text-align:center;border-radius:8px;justify-content:center;align-items:center;font-weight:900;text-decoration:none;display:inline-flex}.family-access:hover{color:var(--primary-strong)}.family-access.compact{background:#fff;border:1px solid #e9d5ff;padding:0 16px}.link-button{color:#fff}.topbar,.session-header,.workspace,.metric-grid{gap:18px;display:flex}.topbar{justify-content:space-between;align-items:center;margin-bottom:24px}.topbar h1,.setup-form h2,.dashboard h2,.session-header h2{letter-spacing:0;margin:0}.eyebrow{color:var(--secondary);letter-spacing:.08em;text-transform:uppercase;margin:0 0 4px;font-size:.74rem;font-weight:900}.nav-actions{flex-wrap:wrap;gap:8px;display:flex}.nav-actions .active,.option-grid .selected,.primary{border-color:var(--primary);background:var(--primary);color:#fff}.primary{min-height:56px;font-size:1.04rem;box-shadow:0 4px 14px #8b5cf633}.primary:hover:not(:disabled){background:var(--primary-strong);border-color:var(--primary-strong)}.primary.compact{min-width:142px;min-height:48px;box-shadow:none}.workspace{align-items:flex-start}.student-workspace{justify-content:center}.app-shell:has(.student-workspace){width:100%;min-height:100vh;padding:0}.student-workspace{min-height:100vh}.student-workspace .tutoria-panel{min-height:100vh;box-shadow:none;border:0;border-radius:0}.study-controls,.setup-form,.tutoria-panel,.dashboard{border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);border-radius:12px}.tutoria-panel,.dashboard{flex:1;min-width:0;padding:clamp(18px,3vw,32px)}.background-decorative{background:linear-gradient(135deg,var(--decorative-a,#8b5cf614)0%,transparent 34%),linear-gradient(315deg,var(--decorative-b,#22c55e0f)0%,transparent 32%),var(--bg);position:relative;overflow:hidden}.background-decorative>*{z-index:1;position:relative}.tutoria-panel.background-decorative{overflow:visible}.setup-screen{background:var(--bg);place-items:center;min-height:calc(100vh - 140px);display:grid}.setup-form{gap:24px;width:min(680px,100%);padding:clamp(24px,5vw,40px);display:grid}.setup-form h2{color:var(--ink);letter-spacing:-.02em;font-size:clamp(1.8rem,6vw,2.5rem);font-weight:700}.setup-form>div>p:not(.eyebrow),.setup-success>p{color:var(--muted);margin:8px 0 0;font-weight:500}.setup-success{text-align:left}.access-code-card{background:linear-gradient(135deg,var(--soft-green)0%,var(--panel)100%);text-align:center;border:1px solid #22c55e4d;border-radius:12px;gap:8px;padding:20px;transition:transform .2s;display:grid;box-shadow:0 4px 12px #22c55e14}.access-code-card:hover{transform:translateY(-2px)}.setup-note{border:1px solid #3b82f640;border-left:6px solid var(--secondary);background:var(--soft-blue);border-radius:12px;gap:6px;padding:16px;display:grid}.setup-note strong{color:var(--ink);font-weight:600}.setup-note span{color:var(--muted);font-size:.92rem;font-weight:500}.access-code-card p{color:var(--muted);margin:0;font-size:.95rem;font-weight:600}.access-code-card strong{color:var(--primary);letter-spacing:.15em;text-shadow:0 0 20px #8b5cf626;font-size:clamp(2.2rem,10vw,3.4rem);font-weight:700}.level-cards{border:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:0;padding:0;display:grid}.level-cards legend{color:var(--muted);grid-column:1/-1;margin-bottom:10px;font-size:.95rem;font-weight:600}.level-card{border:1px solid var(--line);background:var(--panel);text-align:left;cursor:pointer;border-radius:12px;align-content:start;gap:8px;min-height:120px;padding:16px;transition:transform .2s cubic-bezier(.4,0,.2,1),border-color .2s,box-shadow .2s;display:grid}.level-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}.level-card strong{color:var(--ink);font-size:1rem;font-weight:600}.level-card span{color:var(--muted);font-size:.88rem;font-weight:500;line-height:1.4}.level-card.selected{border-color:var(--primary);background:var(--soft-purple);box-shadow:var(--glow);transform:translateY(-2px)}.setup-submit{font-size:1.1rem;font-weight:600}.check-row{color:var(--ink);cursor:pointer;align-items:center;gap:12px;font-weight:500;display:flex}.check-row input{width:20px;height:20px;accent-color:var(--primary);cursor:pointer;border-radius:6px}.session-header{justify-content:center;align-items:center;margin-bottom:6px}.student-session-header .monse{justify-content:center}.monse{justify-content:center;align-items:center;gap:14px;display:flex}.monse-avatar{background:radial-gradient(circle at 50% 35%,#fff3b0 0 31%,#b77b43 32% 100%);border:4px solid #8b5e34;border-radius:50%;flex:0 0 58px;width:58px;height:58px;animation:3s ease-in-out infinite monseFloat;position:relative;box-shadow:0 12px 26px #f59e0b47}.monse-eye{background:#171410;border-radius:50%;width:11px;height:11px;position:absolute;top:16px}.monse-eye.left{left:18px}.monse-eye.right{right:18px}.monse-beak{border-left:7px solid #0000;border-right:7px solid #0000;border-top:13px solid var(--tertiary);width:0;height:0;position:absolute;top:31px;left:23px}.monse-message,.visual-note,.decision,.status{color:var(--muted)}.tutor-chip{border:1px solid var(--line);-webkit-backdrop-filter:blur(8px);box-shadow:var(--shadow);background:#1a1725d9;border-radius:999px;align-items:center;gap:10px;padding:7px 13px 7px 7px;display:inline-flex}.tutor-chip img,.tutor-message img{border-radius:50%;flex:0 0 40px;width:40px;height:40px}.tutor-chip div,.tutor-message div{gap:1px;display:grid}.tutor-chip strong,.tutor-message strong{font-size:.95rem;line-height:1.1}.tutor-chip span{color:var(--muted);font-size:.76rem;font-weight:600}.tutor-message{align-items:flex-start;gap:12px;display:flex}.tutor-message p{color:var(--muted);margin:0;font-weight:500}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 12px #8b5cf633}50%{box-shadow:0 0 24px #8b5cf659}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes monseFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.question-area{text-align:center;gap:20px;width:min(760px,100%);margin:0 auto;display:grid}.question-text{color:var(--ink);letter-spacing:0;margin:0;font-size:clamp(1.35rem,4vw,2rem);font-weight:700;line-height:1.28}.question-text.small{font-size:clamp(1.2rem,3vw,1.55rem)}.lesson-step-shell{flex-direction:column;gap:12px;width:min(850px,100%);min-height:calc(100vh - 120px);margin:0 auto;display:flex}.lesson-progress{justify-content:center;gap:8px;display:flex}.lesson-progress span{background:var(--line);border-radius:999px;width:10px;height:10px;transition:width .2s cubic-bezier(.4,0,.2,1),background .2s,box-shadow .2s}.lesson-progress span.done{background:var(--primary);box-shadow:0 0 8px #8b5cf666}.lesson-progress span.current{background:var(--primary);width:34px;box-shadow:0 0 8px #8b5cf666}.lesson-step-card{scrollbar-gutter:stable;border:1px solid var(--line);background:var(--panel);min-height:0;max-height:calc(100vh - 218px);box-shadow:var(--shadow),var(--glow);border-radius:12px;flex:1;justify-content:center;align-items:flex-start;padding:clamp(18px,3vw,30px);animation:.35s both fadeInUp;display:flex;overflow-y:auto}.lesson-step-card::-webkit-scrollbar{width:10px}.lesson-step-card::-webkit-scrollbar-track{background:var(--bg);border-radius:999px}.lesson-step-card::-webkit-scrollbar-thumb{border:2px solid var(--bg);background:var(--primary);border-radius:999px}.lesson-step-content{gap:10px;width:100%;display:grid}.intro-step h2,.example-step h2,.exercise-step h2{color:var(--primary);margin:0;font-size:clamp(1.32rem,2.8vw,1.8rem);line-height:1.16}.intro-step p,.example-question{color:var(--muted);margin:0;font-size:clamp(1rem,2.1vw,1.14rem);font-weight:500}.key-concept,.hint,.lesson-answer,.lesson-reinforcement,.lesson-close{border-radius:8px;margin:0;padding:14px 16px;font-weight:600}.key-concept{border:2px solid #f7d891;border-left:6px solid var(--tertiary);background:linear-gradient(90deg,#fff7d6,var(--soft-orange));color:#92400e}.hint{background:var(--soft-blue);color:#1e40af}.example-heading{text-align:center;justify-content:center;align-items:center;gap:12px;display:flex}.example-heading>span{width:50px;height:50px;color:var(--primary);background:linear-gradient(135deg,#fef3c7,#f3e8ff);border-radius:50%;place-items:center;font-size:2rem;display:grid}.example-question{text-align:center;background:linear-gradient(90deg,#faf5ff,#eff6ff);border:2px solid #e9d5ff;border-radius:18px;padding:12px 16px}.lesson-steps{background:0 0;border-radius:0;gap:7px;padding:0;display:grid}.lesson-step-row{border:2px solid var(--line);background:var(--panel);border-radius:12px;align-items:flex-start;gap:10px;margin:0;padding:9px 12px;transition:border-color .2s,transform .2s,box-shadow .2s;display:flex}.lesson-step-row:hover{border-color:var(--primary);box-shadow:var(--glow);transform:translateY(-1px)}.lesson-step-row span{background:var(--primary);color:#fff;border-radius:50%;flex:0 0 28px;place-items:center;width:28px;height:28px;font-weight:900;display:grid}.lesson-step-row p{color:var(--muted);margin:0;font-size:.96rem;font-weight:500}.lesson-answer{background:linear-gradient(90deg,#f0fdf4,var(--soft-green));color:#065f46;text-align:left;border:2px solid #bbf7d0;border-radius:14px;justify-content:center;align-items:center;gap:12px;display:flex}.lesson-answer>span{background:var(--success);color:#fff;border-radius:50%;place-items:center;width:32px;height:32px;font-weight:900;display:grid}.lesson-answer small{color:var(--muted);font-weight:800;display:block}.lesson-answer strong{color:var(--success);font-size:clamp(1.05rem,2.2vw,1.35rem);display:block}.lesson-reinforcement{border-left:5px solid var(--tertiary);color:#4a5568;background:#fff7ed;padding:10px 12px;font-style:italic}.lesson-reinforcement span{color:#c2410c;font-style:normal;font-weight:900}.math-visual,.rest-visual,.sequence-visual{justify-items:center;gap:8px;width:min(100%,520px);margin:4px auto 2px;display:grid}.math-visual-title,.math-visual-result,.sequence-visual p,.rest-row p,.rest-label{color:#475569;text-align:center;margin:0;font-weight:900}.multiply-grid{justify-content:center;gap:5px;max-width:100%;max-height:126px;display:grid;overflow:hidden}.multiply-dot{color:#fff;border:2px solid #ffffffc7;border-radius:10px;place-items:center;width:34px;height:34px;font-size:.82rem;font-weight:900;display:grid;box-shadow:0 8px 18px #0f172a1a}.math-visual-svg,.pizza-svg{width:100%;max-width:360px;max-height:180px;margin:0 auto;display:block}.math-visual-svg.wide{max-width:620px;max-height:240px}.pizza-svg{max-width:190px}.svg-title,.svg-label,.svg-small{fill:#334155;font-family:Inter,Segoe UI,ui-sans-serif,system-ui,sans-serif;font-weight:700}.svg-title{font-size:20px}.svg-label{font-size:15px}.svg-small{font-size:12px}.fraction-operation{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;width:100%;display:flex}.fraction-operation .math-visual{width:auto;max-width:150px}.fraction-operation .pizza-svg{max-width:120px}.fraction-operation>span{color:var(--primary);font-size:1.8rem;font-weight:900}.rest-visual{background:linear-gradient(90deg,#eff6ff,#f8fafc);border:2px solid #dbeafe;border-radius:18px;max-width:620px;padding:12px}.rest-row{gap:5px;width:100%;display:grid}.rest-row>div{flex-wrap:wrap;justify-content:center;gap:5px;display:flex}.rest-row span{background:#e2e8f0;border:2px solid #cbd5e1;border-radius:50%;width:20px;height:20px}.rest-row span.blue{background:#60a5fa;border-color:#2563eb}.rest-row span.green{background:#4ade80;border-color:#16a34a}.rest-label.orange{color:#c2410c}.rest-label.green{color:#15803d}.roman-visual{background:linear-gradient(90deg,#faf5ff,#eff6ff);border:2px solid #e9d5ff;border-radius:18px;justify-content:center;align-items:center;gap:22px;width:min(100%,420px);margin:4px auto;padding:16px;display:flex}.roman-visual div{justify-items:center;gap:2px;display:grid}.roman-visual small{color:var(--muted);font-weight:850}.roman-visual strong,.roman-visual>span{color:var(--primary);font-size:clamp(1.6rem,4vw,2.4rem);font-weight:900}.sequence-row{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.sequence-row span{color:#fff;background:linear-gradient(135deg,#60a5fa,#a855f7);border-radius:14px;place-items:center;min-width:48px;min-height:48px;font-weight:900;display:grid;box-shadow:0 10px 18px #4f46e526}.exercise-tip{color:#c2410c;text-align:center;background:linear-gradient(90deg,#fff7ed,#fef3c7);border:2px solid #fed7aa;border-radius:14px;padding:14px 16px;font-weight:850}.solved-case-shell{gap:16px;width:min(820px,100%);max-height:calc(100vh - 96px);margin:0 auto;padding:2px 4px 22px;display:grid;overflow-y:auto}.method-card,.solved-case-title,.solved-problem-card,.solved-step-card{box-shadow:var(--shadow);background:#fff;border-radius:12px}.method-card{background:linear-gradient(135deg,#eff6ff,#eef2ff);border:2px solid #bfdbfe;gap:18px;padding:clamp(20px,4vw,32px);display:grid}.method-card h2,.solved-case-title h2{color:#1e40af;text-align:center;margin:0;font-size:clamp(1.55rem,4vw,2.25rem);line-height:1.18}.method-card>p:not(.eyebrow){color:#2563eb;text-align:center;margin:0;font-size:1.05rem;font-weight:800}.method-step-list{gap:12px;display:grid}.method-step{background:#fff;border:1px solid #dbeafe;border-radius:16px;align-items:flex-start;gap:14px;padding:14px;display:flex}.method-step>span{background:#eff6ff;border-radius:50%;flex:0 0 46px;place-items:center;width:46px;height:46px;font-size:1.75rem;display:grid}.method-step h3{color:var(--ink);margin:0 0 4px;font-size:1.12rem}.method-step p{color:#475569;margin:0;font-size:1rem;font-weight:700;line-height:1.5}.solved-next-button,.solved-practice-button{color:#fff;background:#fb923c;border:0;min-height:58px;font-size:1.1rem}.solved-next-button{background:#3b82f6}.solved-next-button:hover:not(:disabled){background:#2563eb}.solved-practice-button:hover:not(:disabled),.exam-submit:hover:not(:disabled){background:#ea580c}.solved-case-title{background:linear-gradient(90deg,#fffbeb,#fff7ed);border:2px solid #fed7aa;padding:20px}.solved-case-title h2{color:#92400e}.solved-problem-card{border:1px solid #fde68a;border-left:6px solid #f59e0b;padding:clamp(18px,4vw,26px)}.solved-problem-card h3,.solved-step-card h4{color:var(--ink);margin:0 0 10px}.solved-problem-card p,.solved-step-card 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