:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-primary-light: #3b82f6;--color-secondary: #f59e0b;--color-secondary-dark: #d97706;--color-accent: #10b981;--color-text: #1e293b;--color-text-light: #64748b;--color-text-lighter: #94a3b8;--color-bg: #ffffff;--color-bg-subtle: #f8fafc;--color-bg-muted: #f1f5f9;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-worksheet-bg: #fffef7;--color-worksheet-line: #94a3b8;--color-worksheet-trace: #3b82f6;--color-worksheet-trace-light: rgba(59, 130, 246, .3);--font-primary: "Nunito", -apple-system, BlinkMacSystemFont, sans-serif;--font-handwriting: "Caveat", cursive;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--space-4xl: 6rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-primary);color:var(--color-text);background-color:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none}img{max-width:100%;height:auto}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-lg)}.section{padding:var(--space-4xl) 0}.section-title{font-size:2.5rem;font-weight:800;text-align:center;margin-bottom:var(--space-md);color:var(--color-text)}.section-subtitle{font-size:1.125rem;color:var(--color-text-light);text-align:center;max-width:600px;margin:0 auto var(--space-3xl)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-xl);font-size:1rem;font-weight:600;border-radius:var(--radius-lg);transition:all var(--transition-base)}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md),0 0 #2563eb66}.btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-lg),0 0 0 4px #2563eb26}.btn-secondary{background:var(--color-bg);color:var(--color-text);border:2px solid var(--color-border)}.btn-secondary:hover{border-color:var(--color-primary);color:var(--color-primary)}.btn-large{padding:var(--space-lg) var(--space-2xl);font-size:1.125rem}.input{width:100%;padding:var(--space-md) var(--space-lg);font-size:1rem;font-family:inherit;border:2px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg);transition:all var(--transition-base)}.input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 4px #2563eb1a}.input::placeholder{color:var(--color-text-lighter)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-fade-in-up{animation:fadeInUp .6s ease forwards}.animate-float{animation:float 3s ease-in-out infinite}@media (max-width: 768px){.section{padding:var(--space-3xl) 0}.section-title{font-size:2rem}.section-subtitle{font-size:1rem}}.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--color-border-light)}.header-container{display:flex;align-items:center;justify-content:space-between;height:72px}.logo{display:flex;align-items:center;gap:var(--space-sm);font-size:1.5rem;font-weight:800;color:var(--color-text);transition:opacity var(--transition-base)}.logo:hover{opacity:.8}.logo-icon{font-size:1.75rem}.logo-text{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav{display:flex;align-items:center;gap:var(--space-xl)}.nav-link{font-size:.9375rem;font-weight:600;color:var(--color-text-light);transition:color var(--transition-base);position:relative}.nav-link:after{content:"";position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--color-primary);border-radius:var(--radius-full);transition:width var(--transition-base)}.nav-link:hover{color:var(--color-primary)}.nav-link:hover:after{width:100%}.nav-cta{padding:var(--space-sm) var(--space-lg);font-size:.9375rem}.menu-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;gap:5px;cursor:pointer;z-index:1001}.menu-toggle span{display:block;width:24px;height:2px;background:var(--color-text);border-radius:var(--radius-full);transition:all var(--transition-base)}.menu-toggle.menu-open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.menu-toggle.menu-open span:nth-child(2){opacity:0}.menu-toggle.menu-open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}@media (max-width: 768px){.menu-toggle{display:flex}.nav{position:fixed;top:0;right:0;width:280px;height:100vh;background:var(--color-bg);flex-direction:column;align-items:flex-start;justify-content:flex-start;padding:100px var(--space-xl) var(--space-xl);gap:var(--space-lg);box-shadow:var(--shadow-xl);transform:translate(100%);transition:transform var(--transition-slow)}.nav-open{transform:translate(0)}.nav-link{font-size:1.125rem}.nav-cta{width:100%;margin-top:var(--space-md)}}.demo-container{display:flex;flex-direction:column;align-items:center;gap:var(--space-xl);width:100%}.demo-input-wrapper{display:flex;flex-direction:column;align-items:center;gap:var(--space-md);width:100%;max-width:320px}.demo-label{font-size:1rem;font-weight:600;color:var(--color-text-light)}.demo-input{text-align:center;font-size:1.25rem;font-weight:700;letter-spacing:.05em}.worksheet-preview{position:relative;width:100%;max-width:480px;perspective:1000px}.worksheet-paper{background:var(--color-worksheet-bg);border-radius:var(--radius-lg);padding:var(--space-xl);box-shadow:0 1px 3px #00000014,0 4px 12px #0000000d,inset 0 0 60px #00000005;border:1px solid rgba(0,0,0,.06);position:relative;transform:rotateX(2deg);transition:transform var(--transition-slow)}.worksheet-paper:hover{transform:rotateX(0)}.worksheet-paper:before{content:"";position:absolute;left:40px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,transparent,#fca5a5 10%,#fca5a5 90%,transparent);opacity:.4}.worksheet-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-lg);padding-bottom:var(--space-md);border-bottom:2px solid var(--color-border)}.worksheet-title{font-family:var(--font-handwriting);font-size:1.5rem;font-weight:600;color:var(--color-text)}.worksheet-name-field{display:flex;align-items:baseline;gap:var(--space-sm)}.worksheet-name-label{font-size:.875rem;color:var(--color-text-light)}.worksheet-name-line{font-family:var(--font-handwriting);font-size:1.25rem;font-weight:600;color:var(--color-primary);border-bottom:1px solid var(--color-text-light);padding:0 var(--space-sm);min-width:80px;text-align:center}.worksheet-section{margin-bottom:var(--space-lg)}.worksheet-section-title{display:flex;align-items:center;gap:var(--space-sm);font-size:.875rem;font-weight:700;color:var(--color-text);margin-bottom:var(--space-md);text-transform:uppercase;letter-spacing:.05em}.section-icon{font-size:1rem}.trace-exercises{display:flex;flex-direction:column;gap:var(--space-sm)}.trace-row{display:flex;gap:var(--space-sm);justify-content:center}.trace-item{width:80px;height:60px;background:#fff;border-radius:var(--radius-md);border:1px dashed var(--color-border);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.trace-svg{width:100%;height:100%}.trace-path{fill:none;stroke:var(--color-worksheet-trace);stroke-width:3;stroke-dasharray:8 6;stroke-linecap:round;opacity:.6}.curve-path{stroke-dasharray:6 5}.start-dot{fill:var(--color-accent)}.end-dot{fill:var(--color-secondary)}.letters-row{flex-wrap:wrap}.letter-item{width:44px;height:56px;position:relative;background:#ffffff80;border-radius:4px}.letter-svg{width:100%;height:100%}.guide-line-svg.dashed{stroke-dasharray:3 3;stroke:#d1d5db}.skeleton-path{animation:traceFade 2s ease-in-out infinite}@keyframes traceFade{0%,to{opacity:.5}50%{opacity:.8}}.guide-line.middle{background:var(--color-border);opacity:.5;height:1px;border-style:dashed}.worksheet-footer{display:flex;align-items:center;justify-content:center;gap:var(--space-md);padding-top:var(--space-md);border-top:1px dashed var(--color-border);margin-top:var(--space-lg)}.star-rating{display:flex;gap:4px;font-size:1.25rem;opacity:.3}.footer-text{font-family:var(--font-handwriting);font-size:1.25rem;color:var(--color-text-light)}.worksheet-shadow{position:absolute;bottom:-20px;left:50%;transform:translate(-50%);width:80%;height:20px;background:radial-gradient(ellipse,rgba(0,0,0,.1) 0%,transparent 70%);pointer-events:none}@media (max-width: 540px){.worksheet-paper{padding:var(--space-lg)}.trace-item{width:60px;height:50px}.letter-item{width:44px;height:56px}.letter-background,.letter-trace{font-size:1.75rem}.worksheet-title{font-size:1.25rem}.worksheet-header{flex-direction:column;gap:var(--space-sm)}}.hero{position:relative;padding:calc(72px + var(--space-4xl)) 0 var(--space-4xl);min-height:100vh;display:flex;align-items:center;overflow:hidden}.hero-bg{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1}.hero-pattern{position:absolute;top:0;right:0;bottom:0;left:0;background-image:radial-gradient(circle at 20% 80%,rgba(37,99,235,.08) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(245,158,11,.08) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(16,185,129,.05) 0%,transparent 30%)}.hero-gradient{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,var(--color-bg-subtle) 0%,var(--color-bg) 100%)}.hero-container{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4xl);align-items:center}.hero-content{animation:fadeInUp .8s ease forwards}.hero-title{font-size:3.5rem;font-weight:800;line-height:1.1;color:var(--color-text);margin-bottom:var(--space-lg);letter-spacing:-.02em}.title-highlight{display:block;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.25rem;color:var(--color-text-light);line-height:1.7;margin-bottom:var(--space-2xl);max-width:520px}.hero-cta-group{display:flex;gap:var(--space-md);margin-bottom:var(--space-2xl)}.hero-trust{display:flex;align-items:center;gap:var(--space-md)}.trust-avatars{display:flex}.trust-avatar{width:40px;height:40px;border-radius:var(--radius-full);background:var(--color-bg-muted);border:3px solid white;display:flex;align-items:center;justify-content:center;font-size:1.25rem;margin-left:-10px;box-shadow:var(--shadow-sm)}.trust-avatar:first-child{margin-left:0}.trust-text{font-size:.9375rem;color:var(--color-text-light)}.trust-text strong{color:var(--color-text)}.hero-demo{animation:fadeInUp .8s ease .2s forwards;opacity:0}.hero-wave{position:absolute;bottom:0;left:0;right:0;height:80px;z-index:1}.hero-wave svg{width:100%;height:100%}@media (max-width: 1024px){.hero-container{grid-template-columns:1fr;gap:var(--space-3xl)}.hero-content{text-align:center}.hero-description{margin-left:auto;margin-right:auto}.hero-cta-group,.hero-trust{justify-content:center}}@media (max-width: 768px){.hero{padding-top:calc(72px + var(--space-2xl))}.hero-title{font-size:2.5rem}.hero-description{font-size:1.125rem}.hero-cta-group{flex-direction:column;align-items:center}.hero-trust{flex-direction:column;gap:var(--space-sm)}}.features{background:var(--color-bg)}.features-header{text-align:center;margin-bottom:var(--space-3xl)}.features-label{display:inline-block;font-size:.875rem;font-weight:700;color:var(--color-primary);text-transform:uppercase;letter-spacing:.1em;margin-bottom:var(--space-md)}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl);margin-bottom:var(--space-4xl)}.feature-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-2xl);transition:all var(--transition-base);animation:fadeInUp .6s ease forwards;opacity:0}.feature-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.feature-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--color-bg-muted) 0%,var(--color-bg-subtle) 100%);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:1.75rem;margin-bottom:var(--space-lg)}.feature-title{font-size:1.25rem;font-weight:700;color:var(--color-text);margin-bottom:var(--space-sm)}.feature-description{font-size:.9375rem;color:var(--color-text-light);line-height:1.7}.features-highlight{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4xl);align-items:center;background:linear-gradient(135deg,var(--color-bg-subtle) 0%,var(--color-bg-muted) 100%);border-radius:var(--radius-2xl);padding:var(--space-3xl);border:1px solid var(--color-border-light)}.highlight-badge{display:inline-flex;align-items:center;gap:var(--space-sm);font-size:.875rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--space-lg)}.highlight-title{font-size:2rem;font-weight:800;color:var(--color-text);margin-bottom:var(--space-lg);line-height:1.2}.highlight-text{font-size:1rem;color:var(--color-text-light);line-height:1.7;margin-bottom:var(--space-xl)}.highlight-list{list-style:none;display:flex;flex-direction:column;gap:var(--space-md)}.highlight-list li{display:flex;align-items:center;gap:var(--space-sm);font-size:.9375rem;font-weight:500;color:var(--color-text)}.check-icon{width:20px;height:20px;color:var(--color-accent);flex-shrink:0}.highlight-visual{display:flex;justify-content:center;align-items:center;padding:var(--space-xl)}.visual-stack{position:relative;width:280px;height:260px}.visual-worksheet{position:absolute;width:240px;background:var(--color-worksheet-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;transition:transform var(--transition-base)}.visual-worksheet:nth-child(1){top:0;left:0;z-index:3;transform:rotate(-3deg)}.visual-worksheet:nth-child(2){top:40px;left:20px;z-index:2;transform:rotate(2deg)}.visual-worksheet:nth-child(3){top:80px;left:40px;z-index:1;transform:rotate(-1deg)}.visual-stack:hover .visual-worksheet:nth-child(1){transform:rotate(-3deg) translateY(-10px)}.visual-stack:hover .visual-worksheet:nth-child(2){transform:rotate(2deg) translate(10px)}.visual-stack:hover .visual-worksheet:nth-child(3){transform:rotate(-1deg) translateY(10px)}.worksheet-mini-header{background:var(--color-primary);color:#fff;padding:var(--space-sm) var(--space-md);font-size:.75rem;font-weight:600;display:flex;align-items:center;gap:var(--space-xs)}.worksheet-mini-content{padding:var(--space-lg);background:#fff}.mini-trace{font-family:var(--font-primary);font-size:1.25rem;font-weight:800;color:var(--color-worksheet-trace);letter-spacing:.2em;opacity:.6}@media (max-width: 1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.features-highlight{grid-template-columns:1fr;gap:var(--space-2xl)}.highlight-visual{order:-1}}@media (max-width: 640px){.features-grid{grid-template-columns:1fr}.features-highlight{padding:var(--space-xl)}.highlight-title{font-size:1.5rem}.visual-stack{width:240px;height:220px}.visual-worksheet{width:200px}}.pricing{background:var(--color-bg-subtle)}.pricing-label{display:block;text-align:center;font-size:.875rem;font-weight:700;color:var(--color-primary);text-transform:uppercase;letter-spacing:.1em;margin-bottom:var(--space-md)}.pricing-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-xl);max-width:900px;margin:0 auto}.pricing-card{background:var(--color-bg);border-radius:var(--radius-2xl);border:2px solid var(--color-border);padding:var(--space-2xl);display:flex;flex-direction:column;position:relative;transition:all var(--transition-base)}.pricing-card:hover{border-color:var(--color-primary-light);box-shadow:var(--shadow-xl)}.pricing-card.popular{border-color:var(--color-primary);box-shadow:var(--shadow-lg)}.popular-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);background:var(--color-primary);color:#fff;font-size:.75rem;font-weight:700;padding:var(--space-xs) var(--space-md);border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.05em}.pricing-header{text-align:center;padding-bottom:var(--space-xl);border-bottom:1px solid var(--color-border);margin-bottom:var(--space-xl)}.plan-name{font-size:1.5rem;font-weight:800;color:var(--color-text);margin-bottom:var(--space-xs)}.plan-description{font-size:.9375rem;color:var(--color-text-light);margin-bottom:var(--space-lg)}.plan-price{display:flex;align-items:baseline;justify-content:center;gap:2px}.price-currency{font-size:1.5rem;font-weight:700;color:var(--color-text)}.price-amount{font-size:4rem;font-weight:800;color:var(--color-text);line-height:1}.price-period{font-size:1rem;color:var(--color-text-light);font-weight:500;margin-left:var(--space-xs)}.pricing-features{flex:1;margin-bottom:var(--space-xl)}.features-list{list-style:none;display:flex;flex-direction:column;gap:var(--space-xs)}.feature-item{display:flex;align-items:flex-start;gap:var(--space-sm);font-size:.9375rem}.feature-item.included{color:var(--color-text)}.feature-item.included .feature-icon{color:var(--color-accent)}.feature-item.not-included,.feature-item.not-included .feature-icon{color:var(--color-text-lighter)}.feature-icon{width:20px;height:20px;flex-shrink:0;margin-top:2px}.pricing-cta{margin-top:auto}.pricing-cta .btn{width:100%}.pricing-footer{margin-top:var(--space-3xl);text-align:center}.pricing-note{display:inline-flex;align-items:center;gap:var(--space-sm);font-size:.9375rem;color:var(--color-text-light);background:var(--color-bg);padding:var(--space-md) var(--space-xl);border-radius:var(--radius-full);box-shadow:var(--shadow-sm)}.note-icon{width:20px;height:20px;color:var(--color-accent)}@media (max-width: 768px){.pricing-grid{grid-template-columns:1fr;max-width:400px}.pricing-card.popular{order:-1}.price-amount{font-size:3rem}}.footer{background:var(--color-text);color:#fff;padding:var(--space-4xl) 0 var(--space-xl)}.footer-main{display:grid;grid-template-columns:1.5fr 2fr;gap:var(--space-4xl);padding-bottom:var(--space-3xl);border-bottom:1px solid rgba(255,255,255,.1)}.footer-brand{max-width:320px}.footer-logo{display:inline-flex;align-items:center;gap:var(--space-sm);font-size:1.5rem;font-weight:800;color:#fff;margin-bottom:var(--space-lg)}.footer-logo .logo-icon{font-size:1.75rem}.footer-logo .logo-text{background:linear-gradient(135deg,#60a5fa,#93c5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.footer-tagline{font-size:.9375rem;color:#ffffffb3;line-height:1.7;margin-bottom:var(--space-xl)}.footer-social{display:flex;gap:var(--space-md)}.social-link{width:40px;height:40px;background:#ffffff1a;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;color:#fff;transition:all var(--transition-base)}.social-link:hover{background:var(--color-primary);transform:translateY(-2px)}.social-link svg{width:18px;height:18px}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-2xl)}.footer-heading{font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:#fff;margin-bottom:var(--space-lg)}.footer-list{list-style:none;display:flex;flex-direction:column;gap:var(--space-md)}.footer-list a{font-size:.9375rem;color:#ffffffb3;transition:color var(--transition-base)}.footer-list a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:var(--space-xl)}.copyright,.made-with{font-size:.875rem;color:#ffffff80}@media (max-width: 1024px){.footer-main{grid-template-columns:1fr;gap:var(--space-3xl)}.footer-brand{max-width:none;text-align:center}.footer-social{justify-content:center}}@media (max-width: 768px){.footer-links{grid-template-columns:1fr;text-align:center;gap:var(--space-2xl)}.footer-bottom{flex-direction:column;gap:var(--space-md);text-align:center}}.signup-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-xl);background:linear-gradient(135deg,var(--color-bg-subtle) 0%,var(--color-bg-muted) 100%)}.signup-container{width:100%;max-width:440px;display:flex;flex-direction:column;align-items:center}.signup-logo{display:flex;align-items:center;gap:var(--space-sm);font-size:1.5rem;font-weight:800;color:var(--color-text);margin-bottom:var(--space-2xl);text-decoration:none}.signup-logo .logo-icon{font-size:1.75rem}.signup-logo .logo-text{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 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.logo-icon{font-size:1.5rem}.dashboard-logo .logo-text{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.dashboard-nav{display:flex;align-items:center;gap:var(--space-lg);flex:1;justify-content:center}.dashboard-nav .nav-link{font-size:.9375rem;font-weight:600;color:var(--color-text-light);text-decoration:none;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);transition:all var(--transition-base)}.dashboard-nav .nav-link:hover{color:var(--color-text);background:var(--color-bg-muted)}.dashboard-nav .nav-link.active{color:var(--color-primary);background:#2563eb1a}.dashboard-user{display:flex;align-items:center;gap:var(--space-lg)}.user-info{display:flex;flex-direction:column;align-items:flex-end;gap:2px}.user-name{font-size:.875rem;font-weight:600;color:var(--color-text)}.user-plan{font-size:.75rem;color:var(--color-text-lighter)}.logout-btn{font-size:.875rem;font-weight:500;color:var(--color-text-light);padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);cursor:pointer;transition:all var(--transition-base)}.logout-btn:hover{border-color:var(--color-text-light);color:var(--color-text)}.dashboard-main{padding:var(--space-2xl) 0}.dashboard-container{max-width:1200px;margin:0 auto;padding:0 var(--space-lg)}.dashboard-title{font-size:1.75rem;font-weight:800;color:var(--color-text);margin-bottom:var(--space-xl)}@media (max-width: 768px){.dashboard-header-inner{padding:0 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svg{width:12px;height:12px}.child-name{font-weight:500}.worksheet-actions{display:flex;align-items:center;justify-content:center;gap:var(--space-xs);padding-top:var(--space-sm);border-top:1px solid var(--color-border-light)}.action-btn{width:32px;height:32px;border:none;background:transparent;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--color-text-light);transition:all var(--transition-base)}.action-btn:hover{background:var(--color-bg-muted);color:var(--color-text)}.action-btn.delete:hover{background:#fef2f2;color:#dc2626}.empty-state{text-align:center;padding:var(--space-3xl) var(--space-xl);background:var(--color-bg);border:2px dashed var(--color-border);border-radius:var(--radius-xl)}.empty-state-icon{font-size:3rem;margin-bottom:var(--space-lg);opacity:.8}.empty-state-title{font-size:1.25rem;font-weight:700;color:var(--color-text);margin-bottom:var(--space-sm)}.empty-state-description{font-size:.9375rem;color:var(--color-text-light);margin-bottom:var(--space-xl);max-width:300px;margin-left:auto;margin-right:auto}.worksheet-preview{width:100%;max-width:600px}.worksheet-preview.portrait{max-width:500px}.worksheet-preview.landscape{max-width:700px}.worksheet-paper{background:#fff;border-radius:var(--radius-lg);box-shadow:0 2px 8px #00000014,0 8px 24px #0000000a;border:1px solid rgba(0,0,0,.06);padding:24px;position:relative;min-height:700px}.worksheet-preview.landscape .worksheet-paper{min-height:500px}.worksheet-paper:before{content:"";position:absolute;left:50px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,transparent,#fca5a5 10%,#fca5a5 90%,transparent);opacity:.3}.worksheet-header{display:flex;align-items:center;gap:16px;margin-bottom:20px;padding-bottom:16px;border-bottom:2px solid #e5e7eb}.worksheet-title{font-family:var(--font-handwriting);font-size:1.5rem;font-weight:600;color:var(--color-text);flex-shrink:0}.worksheet-title-input{font-family:var(--font-handwriting);font-size:1.5rem;font-weight:600;color:var(--color-text);border:none;background:transparent;padding:0;margin:0;outline:none;min-width:120px;max-width:200px}.worksheet-title-input:hover{background:#00000005;border-radius:4px}.worksheet-title-input:focus{background:#3b82f60d;border-radius:4px}.worksheet-name-field,.worksheet-date-field{display:flex;align-items:center;gap:8px;font-size:.75rem;color:var(--color-text-light)}.name-line,.date-line{width:80px;height:1px;background:var(--color-text-light)}.date-line{width:60px}.worksheet-content{min-height:500px}.empty-preview{display:flex;flex-direction:column;align-items:center;justify-content:center;height:400px;text-align:center;color:var(--color-text-lighter)}.empty-icon{font-size:3rem;margin-bottom:16px;opacity:.5}.empty-preview p{font-size:.9375rem}.exercise-section{margin-bottom:24px}.exercise-title{display:flex;align-items:center;gap:8px;font-size:.75rem;font-weight:700;color:var(--color-text);text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px}.exercise-icon{font-size:.875rem}.exercise-content{display:flex;flex-direction:column;gap:8px}.trace-line{width:100%;height:auto}.trace-line.horizontal{height:30px}.trace-line.zigzag,.trace-line.wave{height:40px}.trace-path{fill:none;stroke:#9ca3af;stroke-width:2;stroke-linecap:round;opacity:.8}.start-dot{fill:#10b981}.end-dot{fill:#f59e0b}.vertical-lines-row{display:flex;justify-content:center;gap:16px}.trace-line.vertical{width:40px;height:80px}.diagonal-lines-row{display:flex;justify-content:center;gap:8px}.trace-line.diagonal{width:80px;height:80px}.circles-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.trace-line.circle{width:60px;height:60px}.spirals-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}.trace-line.spiral{width:80px;height:80px}.characters-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.trace-character{background:#fff;border:1px 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transparent}.worksheets-list::-webkit-scrollbar{height:6px}.worksheets-list::-webkit-scrollbar-track{background:transparent}.worksheets-list::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-full)}.worksheets-list::-webkit-scrollbar-thumb:hover{background:var(--color-text-lighter)}@media (max-width: 768px){.quick-actions{grid-template-columns:1fr}}.worksheet-creator{min-height:100vh;background:var(--color-bg-subtle);display:flex;flex-direction:column}.creator-header{background:var(--color-bg);border-bottom:1px solid var(--color-border);padding:var(--space-md) var(--space-xl);display:flex;align-items:center;gap:var(--space-xl);position:sticky;top:0;z-index:100}.back-link{display:flex;align-items:center;gap:var(--space-sm);font-size:.875rem;font-weight:500;color:var(--color-text-light);text-decoration:none;transition:color var(--transition-base)}.back-link 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h1{font-size:1.5rem;font-weight:700;color:var(--color-text)}.worksheet-count{font-size:.875rem;font-weight:500;color:var(--color-text-light);padding:var(--space-xs) var(--space-sm);background:var(--color-bg-muted);border-radius:var(--radius-full)}.history-header .btn{display:flex;align-items:center;gap:var(--space-sm)}.history-header .btn svg{width:18px;height:18px}.filters-bar{display:flex;align-items:center;gap:var(--space-lg);margin-bottom:var(--space-xl);padding:var(--space-md);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.search-box{flex:1;position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:var(--space-md);width:18px;height:18px;color:var(--color-text-lighter);pointer-events:none}.search-input{width:100%;padding:var(--space-sm) var(--space-md);padding-left:calc(var(--space-md) + 24px);padding-right:40px;font-size:.9375rem;border:1px solid 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var(--transition-base)}.filter-select:focus{outline:none;border-color:var(--color-primary)}.worksheets-table-container{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}.worksheets-table{width:100%;border-collapse:collapse}.worksheets-table th,.worksheets-table td{padding:var(--space-md) var(--space-lg);text-align:left}.worksheets-table th{background:var(--color-bg-muted);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-light);border-bottom:1px solid var(--color-border)}.worksheets-table tbody tr{border-bottom:1px solid var(--color-border-light);transition:background var(--transition-base)}.worksheets-table tbody tr:last-child{border-bottom:none}.worksheets-table tbody tr:hover{background:var(--color-bg-subtle)}.worksheets-table tbody tr.clickable-row{cursor:pointer}.worksheets-table tbody tr.clickable-row:hover{background:#2563eb0a}.worksheet-cell{display:flex;align-items:center;gap:var(--space-md)}.worksheet-thumbnail{font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--color-bg-muted);border-radius:var(--radius-md)}.worksheet-info{display:flex;flex-direction:column;gap:2px}.worksheet-title{font-weight:600;color:var(--color-text)}.batch-badge{font-size:.75rem;color:var(--color-text-light)}.student-cell{color:var(--color-text)}.no-student{color:var(--color-text-lighter);font-style:italic}.status-badge{display:inline-flex;align-items:center;gap:var(--space-xs);padding:var(--space-xs) var(--space-sm);font-size:.75rem;font-weight:600;border-radius:var(--radius-full)}.status-badge.completed{background:#10b9811a;color:#059669}.status-badge.draft{background:#f59e0b1a;color:#d97706}.status-badge.generated{background:#3b82f61a;color:#2563eb}.action-btn.download{color:var(--color-text-light)}.action-btn.download:hover{background:#3b82f61a;color:var(--color-primary)}.action-btn.loading{cursor:wait;opacity:.7}.action-btn:disabled{pointer-events:none}.btn-spinner{width:14px;height:14px;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-3xl) var(--space-xl);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);text-align:center}.empty-icon{font-size:3rem;margin-bottom:var(--space-md)}.empty-state h3{font-size:1.125rem;font-weight:600;color:var(--color-text);margin-bottom:var(--space-xs)}.empty-state p{font-size:.9375rem;color:var(--color-text-light);margin-bottom:var(--space-lg)}.pagination{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);margin-top:var(--space-xl)}.pagination-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--color-border);background:var(--color-bg);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base)}.pagination-btn svg{width:16px;height:16px;color:var(--color-text-light)}.pagination-btn:hover:not(:disabled){border-color:var(--color-primary);background:#2563eb0d}.pagination-btn:hover:not(:disabled) svg{color:var(--color-primary)}.pagination-btn:disabled{opacity:.4;cursor:not-allowed}.pagination-pages{display:flex;gap:var(--space-xs)}.pagination-page{width:36px;height:36px;display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:500;border:1px solid var(--color-border);background:var(--color-bg);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base)}.pagination-page:hover{border-color:var(--color-primary);color:var(--color-primary)}.pagination-page.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}@media (max-width: 768px){.history-header{flex-direction:column;align-items:flex-start;gap:var(--space-md)}.filters-bar{flex-direction:column;align-items:stretch}.filter-controls{flex-wrap:wrap}.worksheets-table-container{overflow-x:auto}.worksheets-table{min-width:600px}}.class-drawer{position:fixed;top:0;right:0;width:420px;height:100vh;background:var(--color-bg);border-left:1px solid var(--color-border);display:flex;flex-direction:column;z-index:50;transform:translate(100%);transition:transform .3s ease;box-shadow:-4px 0 24px #00000014}.class-drawer.open{transform:translate(0)}.drawer-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-lg) var(--space-xl);border-bottom:1px solid var(--color-border);flex-shrink:0}.drawer-header h2{font-size:1.125rem;font-weight:600;color:var(--color-text);margin:0}.close-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;background:transparent;border-radius:var(--radius-md);cursor:pointer;color:var(--color-text-light);transition:all var(--transition-base)}.close-btn:hover{background:var(--color-bg-muted);color:var(--color-text)}.close-btn svg{width:20px;height:20px}.drawer-content{flex:1;overflow-y:auto;padding:var(--space-xl);display:flex;flex-direction:column;gap:var(--space-xl)}.field-group{display:flex;flex-direction:column;gap:var(--space-sm)}.field-group label{font-size:.8125rem;font-weight:600;color:var(--color-text-light);text-transform:uppercase;letter-spacing:.05em}.field-group input{width:100%;padding:var(--space-md);font-size:1rem;font-family:inherit;color:var(--color-text);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);transition:all var(--transition-base)}.field-group input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.field-group input::placeholder{color:var(--color-text-lighter)}.field-value{font-size:1rem;color:var(--color-text);padding:var(--space-sm) 0}.field-value.secondary{color:var(--color-text-light);font-size:.875rem}.students-section{flex:1;min-height:0}.section-header{display:flex;justify-content:space-between;align-items:center}.section-actions{display:flex;align-items:center;gap:var(--space-sm)}.student-count{font-size:.8125rem;font-weight:500;color:var(--color-text-light);background:var(--color-bg-muted);padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full)}.add-student-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:none;background:var(--color-primary);color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base)}.add-student-btn:hover{background:var(--color-primary-dark);transform:scale(1.05)}.add-student-btn svg{width:16px;height:16px}.add-student-form{display:flex;gap:var(--space-sm);margin-bottom:var(--space-md);padding:var(--space-sm);background:var(--color-bg-subtle);border-radius:var(--radius-md);border:1px solid var(--color-border)}.add-student-form input{flex:1;padding:var(--space-sm) var(--space-md);font-size:.875rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg)}.add-student-form input:focus{outline:none;border-color:var(--color-primary)}.form-actions{display:flex;gap:var(--space-xs)}.btn-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-base)}.btn-icon svg{width:16px;height:16px}.btn-icon.confirm{background:var(--color-primary);color:#fff}.btn-icon.confirm:hover:not(:disabled){background:var(--color-primary-dark)}.btn-icon.confirm:disabled{opacity:.5;cursor:not-allowed}.btn-icon.cancel{background:var(--color-bg-muted);color:var(--color-text-light)}.btn-icon.cancel:hover:not(:disabled){background:var(--color-border);color:var(--color-text)}.btn-icon.edit{background:transparent;color:var(--color-text-lighter)}.btn-icon.edit:hover{background:#3b82f61a;color:var(--color-primary)}.btn-icon.delete{background:transparent;color:var(--color-text-lighter)}.btn-icon.delete:hover:not(:disabled){background:#ef44441a;color:#dc2626}.btn-icon:disabled{opacity:.5;cursor:not-allowed}.btn-spinner-small{width:14px;height:14px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.btn-icon.delete .btn-spinner-small{border:2px solid var(--color-border);border-top-color:#dc2626}.students-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:var(--space-xs);max-height:400px;overflow-y:auto}.student-item{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-sm) var(--space-md);background:var(--color-bg-subtle);border-radius:var(--radius-md);transition:background var(--transition-base)}.student-item:hover{background:var(--color-bg-muted)}.student-item:hover .student-actions{opacity:1}.student-actions{display:flex;gap:var(--space-xs);opacity:0;transition:opacity var(--transition-base);margin-left:auto}.student-edit-form{flex:1;display:flex;gap:var(--space-sm);align-items:center}.student-edit-form input{flex:1;padding:var(--space-xs) var(--space-sm);font-size:.875rem;border:1px solid var(--color-primary);border-radius:var(--radius-sm);background:var(--color-bg)}.student-edit-form input:focus{outline:none;box-shadow:0 0 0 2px #2563eb1a}.student-avatar{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f59e0b,#f97316);color:#fff;font-weight:700;font-size:.875rem;border-radius:50%;flex-shrink:0}.student-info{display:flex;flex-direction:column;gap:2px;min-width:0}.student-name{font-weight:500;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-progress{font-size:.75rem;color:var(--color-text-light)}.empty-students{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-xl);text-align:center;background:var(--color-bg-subtle);border-radius:var(--radius-md);border:1px dashed var(--color-border)}.empty-students .empty-icon{font-size:2rem;margin-bottom:var(--space-sm);opacity:.5}.empty-students p{margin:0;color:var(--color-text-light);font-size:.875rem}.empty-students .hint{font-size:.8125rem;color:var(--color-text-lighter);margin-top:var(--space-xs)}.empty-students .btn{margin-top:var(--space-md)}.btn.btn-sm{padding:var(--space-xs) var(--space-md);font-size:.8125rem}.drawer-footer{display:flex;justify-content:space-between;gap:var(--space-md);padding:var(--space-lg) var(--space-xl);border-top:1px solid var(--color-border);flex-shrink:0}.drawer-footer .btn{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs)}.drawer-footer .btn svg{width:16px;height:16px}.btn-secondary{background:var(--color-bg);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-bg-subtle);border-color:var(--color-border-strong)}.btn-danger-outline{background:transparent;color:#dc2626;border:1px solid #fecaca}.btn-danger-outline:hover{background:#ef44440d;border-color:#f87171}@media (max-width: 900px){.class-drawer{width:100%;max-width:420px}}@media (max-width: 480px){.class-drawer{max-width:100%}.drawer-content{padding:var(--space-lg)}.drawer-header,.drawer-footer{padding:var(--space-md) var(--space-lg)}}.classes-page{position:relative;min-height:100%;transition:padding-right .3s ease}.classes-page.drawer-open{padding-right:420px}.classes-content{max-width:1000px}.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-xl);gap:var(--space-lg)}.header-left{display:flex;flex-direction:column;gap:var(--space-sm)}.back-link{display:inline-flex;align-items:center;gap:var(--space-xs);font-size:.875rem;color:var(--color-text-light);text-decoration:none;transition:color var(--transition-base)}.back-link:hover{color:var(--color-primary)}.back-link svg{width:16px;height:16px}.page-header h1{font-size:1.75rem;font-weight:700;color:var(--color-text);margin:0}.page-header .btn{display:inline-flex;align-items:center;gap:var(--space-xs);flex-shrink:0}.page-header .btn svg{width:18px;height:18px}.classes-table-container{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}.classes-table{width:100%;border-collapse:collapse}.classes-table th,.classes-table td{text-align:left;padding:var(--space-md) var(--space-lg)}.classes-table th{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-light);background:var(--color-bg-subtle);border-bottom:1px solid var(--color-border)}.classes-table td{border-bottom:1px solid var(--color-border);vertical-align:middle}.classes-table tbody tr:last-child td{border-bottom:none}.classes-table tbody tr:hover{background:var(--color-bg-subtle)}.classes-table tbody tr.clickable-row{cursor:pointer}.classes-table tbody tr.clickable-row:hover{background:#2563eb0a}.classes-table tbody tr.selected{background:#2563eb14}.classes-table tbody tr.selected:hover{background:#2563eb1a}.class-name-cell{display:flex;align-items:center;gap:var(--space-md)}.class-icon{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-md);flex-shrink:0}.class-icon svg{width:20px;height:20px;color:#fff}.class-name{font-weight:600;color:var(--color-text)}.student-count-badge{display:inline-flex;align-items:center;padding:var(--space-xs) var(--space-sm);font-size:.8125rem;font-weight:500;color:var(--color-text-light);background:var(--color-bg-muted);border-radius:var(--radius-full)}.date-cell{color:var(--color-text-light);font-size:.875rem}.actions-cell{display:flex;gap:var(--space-xs)}.action-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;background:transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base)}.action-btn svg{width:16px;height:16px}.action-btn.edit{color:var(--color-text-light)}.action-btn.edit:hover{background:#3b82f61a;color:var(--color-primary)}.action-btn.delete{color:var(--color-text-lighter)}.action-btn.delete:hover{background:#ef44441a;color:#dc2626}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-3xl) var(--space-xl);background:var(--color-bg);border:1px dashed var(--color-border);border-radius:var(--radius-lg);text-align:center}.empty-state .empty-icon{font-size:4rem;margin-bottom:var(--space-lg)}.empty-state h3{font-size:1.25rem;font-weight:600;color:var(--color-text);margin-bottom:var(--space-xs)}.empty-state p{color:var(--color-text-light);max-width:400px;margin-bottom:var(--space-xl)}.loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-3xl);gap:var(--space-md)}.spinner{width:40px;height:40px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-state p{color:var(--color-text-light)}.error-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-3xl);text-align:center}.error-icon{font-size:3rem;margin-bottom:var(--space-md)}.error-state h3{font-size:1.125rem;font-weight:600;color:var(--color-text);margin-bottom:var(--space-xs)}.error-state p{color:var(--color-text-light);margin-bottom:var(--space-lg)}.drawer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000004d;z-index:40;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (max-width: 900px){.classes-page.drawer-open{padding-right:0}.classes-table th:nth-child(3),.classes-table td:nth-child(3){display:none}}@media (max-width: 600px){.page-header{flex-direction:column;gap:var(--space-md)}.page-header .btn{width:100%;justify-content:center}.classes-table th,.classes-table td{padding:var(--space-sm) var(--space-md)}.class-icon{width:32px;height:32px}.class-icon svg{width:16px;height:16px}}.app{min-height:100vh;display:flex;flex-direction:column}main{flex:1}