:root{color-scheme:light dark;--color-primary:#4361ee;--color-primary-dark:#3a56d4;--color-primary-light:#4f71ff;--color-secondary:#ff7b00;--color-secondary-dark:#e66d00;--color-secondary-light:#ff8c1a;--color-accent:#7209b7;--color-text:#333;--color-text-light:#666;--color-text-lighter:#999;--color-background:#f2f3f4;--color-background-light:#f8f9fa;--color-background-dark:#e9ecef;--color-success:#28a745;--color-warning:#ffc107;--color-error:#dc3545;--font-size-xs:1.2rem;--font-size-sm:1.4rem;--font-size-md:1.6rem;--font-size-lg:1.8rem;--font-size-xl:2rem;--font-size-2xl:2.4rem;--font-size-3xl:3rem;--font-size-4xl:3.6rem;--font-size-5xl:4.8rem;--font-weight-light:300;--font-weight-regular:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--space-1:.4rem;--space-2:.8rem;--space-3:1.2rem;--space-4:1.6rem;--space-5:2.4rem;--space-6:3.2rem;--space-7:4rem;--space-8:4.8rem;--space-9:6.4rem;--space-10:8rem;--border-radius-sm:.4rem;--border-radius-md:.8rem;--border-radius-lg:1.2rem;--border-radius-xl:2.4rem;--border-radius-full:9999px;--shadow-sm:0 2px 4px #0000000d;--shadow-md:0 4px 6px #0000001a;--shadow-lg:0 10px 15px #0000001a;--shadow-xl:0 20px 25px #00000026;--transition-fast:.15s ease;--transition-normal:.3s ease;--transition-slow:.5s ease;--container-max-width:120rem;--container-padding:2rem;--z-negative:-1;--z-elevate:1;--z-dropdown:10;--z-sticky:100;--z-fixed:200;--z-modal:300;--z-popover:400;--z-tooltip:500}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:62.5%}body{font-family:var(--font-poppins);background-color:var(--color-background);color:var(--color-text);font-size:1.6rem;line-height:1.5;overflow-x:hidden}img,picture,video,canvas,svg{max-width:100%;display:block}input,button,textarea,select{font:inherit}p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}a{color:inherit;text-decoration:none}ul,ol{list-style:none}button{cursor:pointer;background:0 0;border:none}.container{width:100%;max-width:var(--container-max-width);padding:0 var(--container-padding);margin:0 auto}section{padding:var(--space-8) 0}.section-title{font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold);color:var(--color-text);margin-bottom:var(--space-6);text-align:center;position:relative}.section-title:after{content:"";background-color:var(--color-primary);border-radius:var(--border-radius-full);width:6rem;height:.3rem;position:absolute;bottom:-1rem;left:50%;transform:translate(-50%)}@media screen and (width>=1440px){.container{padding:0 var(--space-5)}.section-title{font-size:var(--font-size-4xl)}}@media screen and (width>=1920px){html{font-size:70%}}.btn--outline{color:var(--color-primary);border:2px solid var(--color-primary);box-shadow:none;background-color:#0000}.btn--outline:hover{box-shadow:var(--shadow-sm);background-color:#4361ee0d;transform:translateY(-2px)}.btn{padding:var(--space-3) var(--space-5);border-radius:var(--border-radius-md);font-weight:var(--font-weight-medium);text-align:center;cursor:pointer;transition:all var(--transition-normal);display:inline-block}.btn--primary{background-color:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm);border:2px solid var(--color-primary)}.btn--primary:hover{background-color:var(--color-primary-dark);box-shadow:var(--shadow-md);border-color:var(--color-primary-dark);transform:translateY(-2px)}.btn--loading{position:relative;color:#0000!important}.btn--loading:after{content:"";border:2px solid #ffffff80;border-top-color:#fff;border-radius:50%;width:1.2rem;height:1.2rem;margin-top:-.6rem;margin-left:-.6rem;animation:1s linear infinite spin;position:absolute;top:50%;left:50%}.header{padding:var(--space-4) 0;background-color:var(--color-background);box-shadow:var(--shadow-sm);z-index:var(--z-sticky);position:sticky;top:0}.header__inner{justify-content:space-between;align-items:center;display:flex}.logo__link{color:var(--text-color);align-items:center;text-decoration:none;display:flex}.logo__image{width:32px;height:32px;margin-right:10px}.logo__text{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--color-primary)}.nav{align-items:center;display:flex}.nav__list{gap:var(--space-5);display:flex}.nav__item{position:relative}.nav__link{color:var(--color-text);font-weight:var(--font-weight-medium);transition:color var(--transition-fast);padding:var(--space-2) 0}.nav__link:hover,.nav__link--active{color:var(--color-primary)}.nav__link--active:after{content:"";background-color:var(--color-primary);border-radius:var(--border-radius-full);width:100%;height:2px;position:absolute;bottom:0;left:0}.dropdown__icon{font-size:var(--font-size-xs);margin-left:var(--space-1);transition:transform var(--transition-fast)}.dropdown__menu{background-color:var(--color-background);border-radius:var(--border-radius-md);box-shadow:var(--shadow-md);padding:var(--space-2);min-width:200px;z-index:var(--z-dropdown);opacity:0;visibility:hidden;transition:all var(--transition-normal);pointer-events:none;position:absolute;top:100%;left:50%;transform:translate(-50%)translateY(10px)}.dropdown__menu:before{content:"";background-color:var(--color-background);z-index:-1;width:10px;height:10px;position:absolute;top:-5px;left:50%;transform:translate(-50%)rotate(45deg)}.dropdown__item{padding:var(--space-2) var(--space-3);color:var(--color-text);font-weight:var(--font-weight-medium);text-align:center;border-radius:var(--border-radius-sm);transition:all var(--transition-fast);display:block}.dropdown__item:hover{background-color:var(--color-background-light);color:var(--color-primary)}.dropdown__item--active{color:var(--color-primary);font-weight:var(--font-weight-semibold)}.dropdown:hover .dropdown__menu,.dropdown__menu:hover{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%)translateY(0)}.dropdown:hover .dropdown__icon{transform:rotate(180deg)}.nav-toggle{width:3rem;height:2.4rem;z-index:var(--z-dropdown);display:none;position:relative}.nav-toggle__icon,.nav-toggle__icon:before,.nav-toggle__icon:after{background-color:var(--color-text);width:100%;height:2px;transition:all var(--transition-normal);display:block;position:absolute}.nav-toggle__icon{top:50%;transform:translateY(-50%)}.nav-toggle__icon:before{content:"";top:-8px}.nav-toggle__icon:after{content:"";bottom:-8px}.language-switcher{z-index:1001;margin-left:1rem;display:inline-block;position:relative}.language-toggle{border:2px solid var(--color-primary);border-radius:var(--border-radius-full);cursor:pointer;width:2.5rem;height:2.5rem;transition:all var(--transition-fast);color:var(--color-primary);background-color:#0000;justify-content:center;align-items:center;display:flex}.language-toggle:hover{background-color:var(--color-primary);color:#fff}.language-toggle .fa-icon{color:currentColor;font-size:1.2rem}.language-dropdown{background-color:var(--color-background-light);border:1px solid var(--color-background-dark);border-radius:var(--border-radius-md);box-shadow:var(--shadow-lg);z-index:1000;opacity:0;visibility:hidden;min-width:8rem;transition:all var(--transition-fast);margin-top:.5rem;position:absolute;top:100%;right:0;overflow:hidden;transform:translateY(-10px)}.language-switcher:hover .language-dropdown,.language-switcher.open .language-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.language-option{text-align:left;cursor:pointer;width:100%;transition:all var(--transition-fast);color:var(--color-text);font-size:var(--font-size-sm);border:none;border-bottom:1px solid var(--color-background-dark);background:0 0;padding:.75rem 1rem;display:block}.language-option:last-child{border-bottom:none}.language-option:hover{background-color:var(--color-background-dark);color:var(--color-primary)}.language-option.active{background-color:var(--color-primary);color:#fff;font-weight:500}.language-option.active:hover{background-color:var(--color-primary-dark)}.header__inner .nav{align-items:center;gap:1rem;display:flex}.nav__item--language{justify-content:center;align-items:center;padding:.5rem 0;display:flex}.nav__item--language .language-switcher{margin-left:0}.language-toggle:focus{outline:2px solid var(--color-primary);outline-offset:2px}.language-option:focus{outline:2px solid var(--color-primary);outline-offset:-2px}@media screen and (width<=767px){.nav-toggle{display:block}.nav__list{background-color:var(--color-background);width:80%;max-width:30rem;height:100vh;padding:8rem var(--space-5) var(--space-5);box-shadow:var(--shadow-lg);z-index:var(--z-dropdown);transition:transform var(--transition-normal);flex-direction:column;display:none;position:fixed;top:0;right:0;transform:translate(100%)}.nav__list.nav__list--active{display:flex;transform:translate(0)}.nav__link--active:after{width:4rem}.dropdown__menu{box-shadow:none;opacity:1;visibility:visible;margin-top:var(--space-3);margin-left:var(--space-4);pointer-events:auto;background-color:#0000;min-width:auto;padding:0;display:none;position:static;transform:none}.dropdown__menu:before{display:none}.dropdown__menu.dropdown__menu--active{display:block}.dropdown__item{color:var(--color-text-light);padding:var(--space-2) 0;text-align:left}.dropdown__toggle{justify-content:space-between;width:100%}.dropdown:hover .dropdown__menu{opacity:1;visibility:visible;transform:none}.nav-toggle.nav-toggle--active .nav-toggle__icon{background-color:#0000}.nav-toggle.nav-toggle--active .nav-toggle__icon:before{top:0;transform:rotate(45deg)}.nav-toggle.nav-toggle--active .nav-toggle__icon:after{bottom:0;transform:rotate(-45deg)}}@media screen and (width>=1024px){.nav__list{display:flex!important;transform:translate(0)!important}}@media (width<=768px){.nav__item--language{border-top:1px solid var(--color-background-dark);justify-content:flex-start;width:100%;padding:1rem 0}.nav__item--language .language-switcher{justify-content:center;width:auto;margin-left:0;display:flex}.language-toggle{width:2.5rem;height:2.5rem}.language-toggle .fa-icon{font-size:1.2rem}.language-dropdown{min-width:8rem;left:50%;right:auto;transform:translate(-50%)translateY(-10px)}.language-switcher:hover .language-dropdown,.language-switcher.open .language-dropdown{transform:translate(-50%)translateY(0)}.language-option{font-size:var(--font-size-sm);padding:.75rem 1rem}}@media (width<=480px){.language-switcher{margin-left:.25rem}.language-toggle{width:1.75rem;height:1.75rem}.language-toggle .fa-icon{font-size:.9rem}}@media (prefers-contrast:high){.language-toggle{border-width:3px}.language-dropdown{border-width:2px}}@media (prefers-reduced-motion:reduce){.language-toggle,.language-dropdown,.language-option{transition:none}}.hero{padding:var(--space-9) 0;background:linear-gradient(135deg, var(--color-background-light) 0%, var(--color-background) 100%);align-items:center;min-height:80vh;display:flex;position:relative;overflow:hidden}.hero__background{width:100%;height:100%;z-index:var(--z-negative);position:absolute;top:0;left:0;overflow:hidden}.hero__shape{border-radius:var(--border-radius-full);opacity:.1;position:absolute}.hero__shape--1{background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);filter:blur(5rem);width:40rem;height:40rem;animation:15s ease-in-out infinite alternate float;top:-15rem;right:-10rem}.hero__shape--2{background:var(--color-primary-light);filter:blur(8rem);width:50rem;height:50rem;animation:20s ease-in-out 1s infinite alternate-reverse float;bottom:-20rem;left:-20rem}.hero__shape--3{background:var(--color-secondary);filter:blur(10rem);width:20rem;height:20rem;animation:18s ease-in-out 2s infinite alternate float;top:60%;left:10%}.hero__shape--4{background:var(--color-primary);filter:blur(12rem);opacity:.05;width:30rem;height:30rem;animation:25s ease-in-out 3s infinite alternate-reverse float;top:25%;right:25%}.hero__inner{z-index:var(--z-elevate);justify-content:space-between;align-items:center;gap:var(--space-6);display:flex;position:relative}.hero__content{flex:1;max-width:60rem}.hero__heading-wrapper{margin-bottom:var(--space-5)}.hero__badge{color:var(--color-primary);font-weight:var(--font-weight-medium);font-size:var(--font-size-sm);padding:var(--space-1) var(--space-3);border-radius:var(--border-radius-full);margin-bottom:var(--space-3);letter-spacing:.5px;text-transform:uppercase;background-color:#4361ee1a;display:inline-block}.hero__title{font-size:var(--font-size-5xl);font-weight:var(--font-weight-bold);color:var(--color-text);line-height:1.2}.hero__highlight{color:var(--color-primary);display:inline-block;position:relative}.hero__highlight:after{content:"";opacity:.3;width:100%;height:.8rem;z-index:var(--z-negative);border-radius:var(--border-radius-sm);background-color:#97a8fc;position:absolute;bottom:.3rem;left:0}.hero__subtitle{font-size:var(--font-size-xl);color:var(--color-text-light);margin-bottom:var(--space-5);line-height:1.5}.hero__features{gap:var(--space-3);margin-bottom:var(--space-6);flex-direction:column;display:flex}.hero__feature{align-items:center;gap:var(--space-3);display:flex}.hero__feature-icon{width:2.4rem;height:2.4rem;color:var(--color-primary);border-radius:var(--border-radius-full);font-size:var(--font-size-sm);background-color:#4361ee1a;justify-content:center;align-items:center;display:flex}.hero__feature-text{font-weight:var(--font-weight-medium);color:var(--color-text)}.hero__cta{gap:var(--space-3);flex-wrap:wrap;display:flex}.hero__image{flex:1;justify-content:flex-end;display:flex}.hero__image-wrapper{width:100%;max-width:50rem;position:relative}.hero__image-container{border-radius:var(--border-radius-lg);width:100%;height:40rem;box-shadow:var(--shadow-lg);z-index:1;transition:transform var(--transition-normal);background-position:50%;background-size:cover;position:relative;overflow:hidden}.hero__image-container:before{content:"";z-index:2;background:linear-gradient(#0000 70%,#0009 100%);width:100%;height:100%;position:absolute;top:0;left:0}.hero__image-wrapper:hover .hero__image-container{box-shadow:var(--shadow-xl);transform:translateY(-5px)}.hero__card{align-items:center;gap:var(--space-3);background-color:var(--color-background);border-radius:var(--border-radius-lg);padding:var(--space-3) var(--space-4);box-shadow:var(--shadow-md);z-index:3;animation:5s ease-in-out infinite cardBounce;display:flex;position:absolute}.hero__card--1{animation-delay:0s;top:2rem;left:-8rem}.hero__card--2{animation-delay:1s;bottom:5rem;right:-1rem}.hero__card-icon{font-size:var(--font-size-2xl);line-height:1}.hero__card-content{flex-direction:column;display:flex}.hero__card-title{font-weight:var(--font-weight-semibold);color:var(--color-text);font-size:var(--font-size-sm)}.hero__card-text{font-size:var(--font-size-xs);color:var(--color-text-light)}@media screen and (width<=767px){.hero__image{display:none}.hero .container{flex-direction:column}.hero__title{font-size:var(--font-size-4xl)}.hero__image-container{margin-top:var(--space-5);height:30rem}.hero__card{display:none}.hero__card--2{right:-2rem}}@media screen and (width>=768px) and (width<=1023px){.hero__title{font-size:var(--font-size-4xl)}}@media screen and (width>=1440px){.hero{padding:var(--space-10) 0}.hero__title{font-size:var(--font-size-5xl)}}.features__grid{gap:var(--space-5);grid-template-columns:repeat(auto-fit,minmax(30rem,1fr));display:grid}.feature-card{background-color:var(--color-background);padding:var(--space-6);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-md);transition:transform var(--transition-normal);height:100%}.feature-card:hover{transform:translateY(-5px)}.feature-card__icon{margin-bottom:var(--space-4);background-color:var(--color-primary-light);border-radius:var(--border-radius-full);justify-content:center;align-items:center;width:6rem;height:6rem;display:flex}.feature-card .icon{fill:#fff;width:2.4rem;height:2.4rem}.feature-card__title{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-3);color:var(--color-text)}.feature-card__text{color:var(--color-text-light)}@media screen and (width<=767px){.features__grid{grid-template-columns:1fr}}@media screen and (width>=768px) and (width<=1023px){.features__grid{grid-template-columns:repeat(2,1fr)}}.steps{background-color:var(--color-background-light);padding:var(--space-9) 0}.steps__intro{text-align:center;font-size:var(--font-size-lg);color:var(--color-text-light);max-width:70rem;margin:0 auto var(--space-7)}.steps__timeline{gap:var(--space-5);flex-direction:column;max-width:90rem;margin:0 auto;display:flex;position:relative}.steps__timeline:before{content:"";background-color:var(--color-primary-light);z-index:0;width:2px;position:absolute;top:0;bottom:0;left:25px}.step{gap:var(--space-5);z-index:1;flex-direction:column;display:flex;position:relative}.step__number{background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);color:#fff;font-weight:var(--font-weight-bold);border-radius:var(--border-radius-full);box-shadow:var(--shadow-md);width:5rem;height:5rem;font-size:var(--font-size-lg);margin-bottom:var(--space-3);flex-shrink:0;justify-content:center;align-items:center;display:flex}.step__content{background-color:var(--color-background);padding:var(--space-5);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-md);transition:transform var(--transition-normal);flex:1}.step:hover .step__content{transform:translateY(-5px)}.step__title{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);color:var(--color-text);margin-bottom:var(--space-2)}.step__text{color:var(--color-text-light);line-height:1.6}.steps__cta{margin-top:var(--space-4);justify-content:center;display:flex}@media screen and (width<=767px){.steps__timeline:before{left:25px}.step{flex-direction:column}.step__number{width:5rem;height:5rem;font-size:var(--font-size-lg);margin-bottom:var(--space-3)}.step:hover .step__content{transform:translateY(-5px)}}.download-section{padding:var(--space-4) 0}.download-box{justify-content:center;align-items:center;display:flex}.download-btn{align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);font-size:var(--font-size-md);font-weight:var(--font-weight-medium);transition:all var(--transition-normal);box-shadow:var(--shadow-sm);margin-top:var(--space-4);display:inline-flex}.download-btn:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.download-btn-icon{align-items:center;display:flex}.download-btn-icon svg{stroke:currentColor;width:1.8rem;height:1.8rem}@media (width<=768px){.download-box{text-align:center;gap:var(--space-3);flex-direction:column}}.subjects-showcase{padding:var(--space-8) 0;background-color:var(--color-background)}.subjects-showcase__intro{text-align:center;font-size:var(--font-size-lg);color:var(--color-text-light);max-width:70rem;margin:0 auto var(--space-7);line-height:1.6}.subjects-grid{margin-bottom:var(--space-6)}.subjects-secondary-grid{gap:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(32rem,1fr));display:grid}.subject-category{background-color:var(--color-background-light);border-radius:var(--border-radius-lg);padding:var(--space-5);box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.subject-category:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}.subject-category--featured{background:linear-gradient(135deg,#4361ee0d 0%,#4361ee1a 100%);border:2px solid #4361ee33}.subject-category__title{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--color-primary);margin-bottom:var(--space-4);padding-bottom:var(--space-2);border-bottom:2px solid var(--color-primary-light);display:inline-block;position:relative}.subject-category__title:after{content:"";background:linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));width:0;height:2px;transition:width .6s;position:absolute;bottom:-2px;left:0}.subject-category:hover .subject-category__title:after{width:100%}.subject-category--featured .subject-category__title{font-size:var(--font-size-2xl);text-align:center;padding-bottom:var(--space-3);display:block;position:relative}.subject-category--featured .subject-category__title:after{content:"";background:linear-gradient(90deg, var(--color-primary-light), var(--color-primary), var(--color-primary-light));border-radius:var(--border-radius-full);width:8rem;height:3px;transition:width .6s,transform .6s;position:absolute;bottom:0;left:50%;transform:translate(-50%)}.subject-category--featured:hover .subject-category__title:after{width:12rem}.subject-category__items{gap:var(--space-3);flex-direction:column;display:flex}.subject-category__featured-items{gap:var(--space-4);grid-template-columns:repeat(auto-fit,minmax(30rem,1fr));display:grid}.subject-item{background-color:var(--color-background);border-radius:var(--border-radius-md);box-shadow:var(--shadow-sm);transition:all var(--transition-fast);border:1px solid #0000;overflow:hidden}.subject-item:hover{box-shadow:var(--shadow-md);border-color:var(--color-primary-light);transform:translateY(-2px)}.subject-item__header{padding:var(--space-3) var(--space-4);cursor:pointer;transition:background-color var(--transition-fast);justify-content:space-between;align-items:center;display:flex}.subject-item__header:hover{background-color:#4361ee0d}.subject-category--featured .subject-item__header{padding:var(--space-4)}.subject-item__icon-title{align-items:center;gap:var(--space-3);display:flex}.subject-item__icon{border-radius:var(--border-radius-full);background-color:var(--color-primary-light);color:#fff;flex-shrink:0;justify-content:center;align-items:center;width:3.6rem;height:3.6rem;display:flex}.subject-item__icon--math{background:linear-gradient(135deg,#4361ee 0%,#3a56d4 100%)}.subject-item__icon--language{background:linear-gradient(135deg,#2ec4b6 0%,#1a9c8e 100%)}.subject-item__icon--english{background:linear-gradient(135deg,#f72585 0%,#d61f69 100%)}.subject-category--featured .subject-item__icon{width:4.2rem;height:4.2rem;box-shadow:0 3px 6px #0000001a}.subject-item__header h4{font-size:var(--font-size-md);font-weight:var(--font-weight-semibold);color:var(--color-text)}.subject-category--featured .subject-item__header h4{font-size:var(--font-size-lg)}.subject-toggle{border-radius:var(--border-radius-full);width:3rem;height:3rem;transition:all var(--transition-fast);justify-content:center;align-items:center;display:flex}.subject-toggle .icon{width:2rem;height:2rem;fill:var(--color-text);transition:all var(--transition-fast)}.subject-toggle:hover{background-color:#4361ee1a}.subject-toggle:hover .icon{fill:var(--color-primary)}.subject-item__content{padding:0 var(--space-4);max-height:0;transition:all var(--transition-normal);overflow:hidden}.subject-item__content p{padding-bottom:var(--space-4);color:var(--color-text-light);line-height:1.6}.subject-item__topics{gap:var(--space-2);margin-bottom:var(--space-4);flex-wrap:wrap;display:flex}.topic-tag{font-size:var(--font-size-xs);border-radius:var(--border-radius-full);background-color:var(--color-background-light);color:var(--color-text);font-weight:var(--font-weight-medium);transition:all var(--transition-fast);padding:.3rem .8rem;display:inline-block}.topic-tag:hover{background-color:var(--color-primary-light);color:#fff;transform:translateY(-2px)}.subject-item--active 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