:root{--primary:#6366f1;--primary-dark:#4f46e5;--primary-light:#eef2ff;--primary-glow:#6366f12e;--accent:#f59e0b;--accent-dark:#d97706;--accent-light:#fffbeb;--success:#22c55e;--success-light:#f0fdf4;--error:#ef4444;--error-light:#fef2f2;--bg:#f8fafc;--surface:#fff;--surface-2:#f1f5f9;--text:#1e293b;--text-secondary:#64748b;--text-muted:#94a3b8;--border:#e2e8f0;--border-focus:var(--primary);--radius-sm:8px;--radius:12px;--radius-lg:20px;--radius-xl:28px;--shadow-sm:0 1px 3px #00000014, 0 1px 2px #0000000a;--shadow:0 4px 16px #6366f11a, 0 1px 4px #0000000f;--shadow-lg:0 12px 40px #6366f129, 0 4px 12px #00000014;--shadow-card:0 2px 8px #0000000f, 0 0 0 1px #0000000a;--font:"Nunito", system-ui, sans-serif;font-family:var(--font);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px;line-height:1.6}*,:before,:after{box-sizing:border-box}body{min-height:100vh;margin:0}#root{flex-direction:column;min-height:100vh;display:flex}h1,h2,h3,h4,h5,h6{color:var(--text);margin:0;font-weight:800;line-height:1.2}p{margin:0}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:var(--font)}input,select,textarea{font-family:var(--font)}.btn{border-radius:var(--radius);font-size:15px;font-weight:700;font-family:var(--font);cursor:pointer;white-space:nowrap;border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;text-decoration:none;transition:all .18s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 12px var(--primary-glow)}.btn-primary:hover{background:var(--primary-dark);box-shadow:0 6px 20px var(--primary-glow);color:#fff;text-decoration:none;transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--surface);color:var(--primary);border:2px solid var(--primary)}.btn-secondary:hover{background:var(--primary-light);color:var(--primary);text-decoration:none}.btn-ghost{color:var(--text-secondary);border:2px solid var(--border);background:0 0}.btn-ghost:hover{background:var(--surface-2);color:var(--text);text-decoration:none}.btn-accent{background:var(--accent);color:#fff;box-shadow:0 4px 12px #f59e0b4d}.btn-accent:hover{background:var(--accent-dark);color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 6px 20px #f59e0b66}.btn-sm{padding:8px 16px;font-size:14px}.btn-lg{border-radius:var(--radius-lg);padding:16px 32px;font-size:17px}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text);font-size:14px;font-weight:700}.form-input{border:2px solid var(--border);border-radius:var(--radius);width:100%;font-size:15px;font-family:var(--font);color:var(--text);background:var(--surface);outline:none;padding:12px 16px;transition:border-color .15s,box-shadow .15s}.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.form-input::placeholder{color:var(--text-muted)}.form-input.error{border-color:var(--error);box-shadow:0 0 0 3px #ef44441f}.form-error{color:var(--error);font-size:13px;font-weight:600}.alert{border-radius:var(--radius);padding:12px 16px;font-size:14px;font-weight:600}.alert-error{background:var(--error-light);color:#b91c1c;border:1px solid #fecaca}.alert-success{background:var(--success-light);color:#15803d;border:1px solid #bbf7d0}.spinner{border:3px solid 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24px;display:flex}.navbar-logo{align-items:center;gap:8px;text-decoration:none;display:flex}.navbar-logo:hover{text-decoration:none}.navbar-logo-icon{background:var(--primary);color:#fff;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;font-size:22px;display:flex}.navbar-logo-text{color:var(--text);letter-spacing:-.5px;font-size:20px;font-weight:900}.navbar-logo-text span{color:var(--primary)}.navbar-actions{align-items:center;gap:10px;display:flex}.navbar-greeting{color:var(--text-secondary);margin-right:4px;font-size:14px;font-weight:600}@media (width<=480px){.navbar-greeting{display:none}.navbar-inner{padding:0 16px}}.landing{flex-direction:column;flex:1;display:flex}.hero{background:linear-gradient(135deg,#eef2ff 0%,#fdf4ff 50%,#fffbeb 100%);justify-content:center;align-items:center;gap:64px;padding:80px 24px 100px;display:flex;position:relative;overflow:hidden}.hero-inner{max-width:540px;animation:.5s 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#a78bfa);opacity:.15;border-radius:40% 60% 70% 30%/40% 50% 60%;position:absolute;inset:30px}.hero-card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);align-items:center;gap:12px;padding:14px 18px;animation:.5s both fadeIn;display:flex;position:absolute}.hero-card-1{animation-delay:.3s;top:20px;left:0}.hero-card-2{animation-delay:.45s;bottom:20px;right:0}.hero-card-emoji{font-size:28px}.hero-card-name{color:var(--text);font-size:14px;font-weight:700}.hero-card-stat{color:var(--text-secondary);margin-top:2px;font-size:13px}.hero-problem{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);text-align:center;min-width:160px;padding:20px 24px;animation:.5s .2s both fadeIn;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.hero-problem-label{color:var(--text-secondary);margin-bottom:8px;font-size:15px;font-weight:600}.hero-problem-answer{color:var(--success);letter-spacing:-1px;font-size:28px;font-weight:900}.section-inner{max-width:1140px;margin:0 auto;padding:0 24px}.section-label{letter-spacing:1.5px;text-transform:uppercase;color:var(--primary);text-align:center;margin-bottom:12px;font-size:13px;font-weight:700}.section-title{letter-spacing:-1px;color:var(--text);text-align:center;margin-bottom:52px;font-size:clamp(26px,3.5vw,38px);font-weight:900}.features{background:var(--surface);padding:100px 0}.features-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;display:grid}.feature-card{background:var(--bg);border-radius:var(--radius-lg);border:1.5px solid var(--border);padding:28px;transition:transform .2s,box-shadow .2s}.feature-card:hover{box-shadow:var(--shadow);border-color:#6366f14d;transform:translateY(-4px)}.feature-icon{margin-bottom:16px;font-size:36px}.feature-title{color:var(--text);margin-bottom:8px;font-size:18px;font-weight:800}.feature-desc{color:var(--text-secondary);font-size:15px;line-height:1.6}.how-it-works{background:linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);padding:100px 0}.steps{flex-direction:column;gap:24px;max-width:600px;margin:0 auto;display:flex}.step{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);border:1.5px solid var(--border);align-items:flex-start;gap:24px;padding:24px 28px;display:flex}.step-num{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:20px;font-weight:900;display:flex}.step-title{color:var(--text);margin-bottom:4px;font-size:17px;font-weight:800}.step-desc{color:var(--text-secondary);font-size:15px;line-height:1.5}.cta{background:var(--surface);padding:100px 0}.cta-card{background:linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);border-radius:var(--radius-xl);text-align:center;padding:64px 40px;position:relative;overflow:hidden}.cta-card:before{content:"";background:#ffffff14;border-radius:50%;width:200px;height:200px;position:absolute;top:-40px;right:-40px}.cta-card:after{content:"";background:#ffffff0d;border-radius:50%;width:240px;height:240px;position:absolute;bottom:-60px;left:-20px}.cta-emoji{margin-bottom:16px;font-size:48px}.cta-title{color:#fff;letter-spacing:-1px;margin-bottom:12px;font-size:clamp(26px,3.5vw,38px);font-weight:900}.cta-sub{color:#fffc;max-width:480px;margin-bottom:32px;margin-left:auto;margin-right:auto;font-size:17px}.cta-card .btn-accent{z-index:1;position:relative}.footer{background:var(--text);padding:32px 24px}.footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;max-width:1140px;margin:0 auto;display:flex}.footer-logo{color:#fff;align-items:center;gap:8px;font-size:18px;font-weight:900;display:flex}.footer-logo-icon{background:var(--primary);border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;display:flex}.footer-copy{color:#fff6;font-size:13px}@media (width<=900px){.hero{text-align:center;flex-direction:column;padding:60px 24px 80px}.hero-actions{justify-content:center}.hero-visual{display:none}}@media (width<=480px){.cta-card{padding:40px 24px}.features-grid{grid-template-columns:1fr}}.auth-page{background:linear-gradient(135deg, var(--primary-light) 0%, #f8fafc 60%);flex:1;justify-content:center;align-items:center;min-height:calc(100vh - 64px);padding:40px 24px;display:flex}.auth-card{background:var(--surface);border-radius:var(--radius-xl);width:100%;max-width:440px;box-shadow:var(--shadow-lg);padding:40px;animation:.25s scaleIn}.auth-header{text-align:center;margin-bottom:32px}.auth-icon{margin-bottom:12px;font-size:48px;display:block}.auth-header h1{color:var(--text);margin-bottom:6px;font-size:26px;font-weight:900}.auth-header p{color:var(--text-secondary);font-size:15px}.auth-form{flex-direction:column;gap:20px;display:flex}.auth-form .btn{width:100%;margin-top:4px}.auth-divider{color:var(--text-muted);align-items:center;gap:12px;font-size:13px;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--border);flex:1;height:1px}.auth-footer{text-align:center;color:var(--text-secondary);margin-top:24px;font-size:14px}.auth-footer a{color:var(--primary);font-weight:700}.auth-footer a:hover{text-decoration:underline}.auth-alert{border-radius:var(--radius);background:var(--error-light);color:#b91c1c;border:1px solid #fecaca;padding:12px 16px;font-size:14px;font-weight:600}.auth-alert.success{background:var(--success-light);color:#15803d;border-color:#bbf7d0}.form-label{justify-content:space-between;align-items:center;display:flex}.form-label-link{color:var(--primary);font-size:13px;font-weight:600;text-decoration:none}.form-label-link:hover{text-decoration:underline}@media (width<=480px){.auth-card{padding:28px 20px}}.dashboard{background:var(--bg);flex-direction:column;flex:1;display:flex}.dashboard-header{background:var(--surface);border-bottom:1px solid var(--border);padding:32px 0}.dashboard-header-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;max-width:1140px;margin:0 auto;padding:0 24px;display:flex}.dashboard-title{color:var(--text);margin-bottom:4px;font-size:28px;font-weight:900}.dashboard-sub{color:var(--text-secondary);font-size:15px}.dashboard-content{width:100%;max-width:1140px;margin:0 auto;padding:32px 24px}.stats-bar{flex-wrap:wrap;gap:16px;margin-bottom:36px;display:flex}.stat-chip{background:var(--surface);border-radius:var(--radius-lg);border:1.5px solid var(--border);box-shadow:var(--shadow-sm);flex:1;align-items:center;gap:14px;min-width:160px;padding:18px 24px;display:flex}.stat-chip-icon{font-size:28px}.stat-chip-value{color:var(--text);font-size:24px;font-weight:900;line-height:1}.stat-chip-label{color:var(--text-secondary);margin-top:2px;font-size:13px;font-weight:600}.section-heading{color:var(--text);margin-bottom:20px;font-size:20px;font-weight:800}.children-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.child-card{background:var(--surface);border-radius:var(--radius-lg);border:1.5px solid var(--border);box-shadow:var(--shadow-card);flex-direction:column;gap:16px;padding:24px;transition:box-shadow .2s,border-color .2s;animation:.25s slideUp;display:flex}.child-card:hover{box-shadow:var(--shadow);border-color:#6366f14d}.child-avatar{font-size:48px;line-height:1}.child-name{color:var(--text);font-size:20px;font-weight:800}.child-grade{color:var(--primary);background:var(--primary-light);border-radius:999px;margin-top:4px;padding:3px 10px;font-size:14px;font-weight:600;display:inline-block}.child-username{color:var(--text-muted);margin-top:4px;font-size:13px;font-weight:600}.modal-credentials-heading{color:var(--text-secondary);background:var(--surface-2);border-radius:var(--radius);border:1px solid var(--border);padding:10px 14px;font-size:14px;font-weight:800}.form-label-note{color:var(--text-muted);text-transform:none;letter-spacing:0;margin-left:8px;font-size:12px;font-weight:600}.child-stats{border-top:1px solid var(--border);border-bottom:1px solid var(--border);gap:20px;padding:12px 0;display:flex}.child-stat{flex-direction:column;gap:2px;display:flex}.child-stat-value{color:var(--text);font-size:20px;font-weight:900}.child-stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:600}.login-help-panel{background:var(--surface-2);border:1.5px solid var(--border);border-radius:var(--radius);flex-direction:column;gap:10px;padding:16px;animation:.15s fadeIn;display:flex}.login-help-title{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:2px;font-size:13px;font-weight:800}.login-cred-row{align-items:center;gap:10px;font-size:14px;display:flex}.login-cred-label{color:var(--text-secondary);min-width:68px;font-weight:700}.login-cred-value{color:var(--text);align-items:center;gap:8px;font-family:monospace;font-size:15px;font-weight:700;display:flex}.login-cred-pin{letter-spacing:3px}.show-pin-btn{color:var(--primary);font-size:12px;font-weight:700;font-family:var(--font);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:2px 6px}.show-pin-btn:hover{background:var(--primary-light)}.change-pin-divider{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-top:1px solid var(--border);margin-top:2px;padding-top:10px;font-size:12px;font-weight:800}.pin-change-row{align-items:center;gap:8px;display:flex}.pin-change-input{border:1.5px solid var(--border);letter-spacing:3px;width:130px;color:var(--text);background:var(--surface);border-radius:8px;outline:none;padding:8px 12px;font-family:monospace;font-size:14px;font-weight:700;transition:border-color .15s}.pin-change-input:focus{border-color:var(--primary)}.pin-feedback{border-radius:6px;padding:6px 10px;font-size:13px;font-weight:600}.pin-error{background:var(--error-light);color:#b91c1c}.pin-success{background:var(--success-light);color:#15803d}.child-struggle-row{color:#92400e;background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;align-items:center;gap:6px;padding:8px 12px;font-size:13px;font-weight:600;display:flex}.child-struggle-icon{flex-shrink:0;font-size:15px}.child-struggle-text{line-height:1.4}.child-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.confirm-delete{color:var(--text-secondary);align-items:center;gap:6px;font-size:13px;font-weight:600;display:flex}.add-child-card{border:2px dashed var(--border);border-radius:var(--radius-lg);cursor:pointer;color:var(--text-muted);min-height:180px;font-size:15px;font-weight:700;font-family:var(--font);background:0 0;flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:32px;transition:all .18s;display:flex}.add-child-card:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.add-child-icon{font-size:32px;line-height:1}.empty-state{text-align:center;background:var(--surface);border-radius:var(--radius-xl);border:1.5px dashed var(--border);padding:80px 24px}.empty-icon{margin-bottom:16px;font-size:64px}.empty-title{color:var(--text);margin-bottom:8px;font-size:22px;font-weight:800}.empty-sub{color:var(--text-secondary);margin-bottom:24px;font-size:15px}.loading-state{justify-content:center;align-items:center;padding:80px;display:flex}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#00000080;justify-content:center;align-items:center;padding:24px;animation:.15s fadeIn;display:flex;position:fixed;inset:0}.modal-card{background:var(--surface);border-radius:var(--radius-xl);width:100%;max-width:480px;max-height:90vh;box-shadow:var(--shadow-lg);padding:32px;animation:.2s scaleIn;overflow-y:auto}.modal-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.modal-title{color:var(--text);font-size:22px;font-weight:900}.modal-close{background:var(--surface-2);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:14px;transition:background .15s;display:flex}.modal-close:hover{background:var(--border);color:var(--text)}.modal-form{flex-direction:column;gap:20px;display:flex}.modal-actions{justify-content:flex-end;gap:10px;padding-top:4px;display:flex}.avatar-grid{grid-template-columns:repeat(6,1fr);gap:8px;display:grid}.avatar-btn{aspect-ratio:1;border:2px solid var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;justify-content:center;align-items:center;width:100%;font-size:24px;transition:all .15s;display:flex}.avatar-btn:hover{border-color:var(--primary);background:var(--primary-light);transform:scale(1.08)}.avatar-btn.selected{border-color:var(--primary);background:var(--primary-light);box-shadow:0 0 0 3px var(--primary-glow)}.grade-grid{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.grade-btn{border:2px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);font-size:13px;font-weight:700;font-family:var(--font);cursor:pointer;text-align:center;padding:10px 8px;transition:all .15s}.grade-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.grade-btn.selected{border-color:var(--primary);background:var(--primary);color:#fff}@media (width<=600px){.avatar-grid{grid-template-columns:repeat(4,1fr)}.grade-grid{grid-template-columns:repeat(2,1fr)}.modal-card{padding:24px 18px}.stats-bar{flex-direction:column}.stat-chip{min-width:unset}}.practice-page{background:linear-gradient(145deg,#4f46e5 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