:root{--color-physics: #3b82f6;--color-physics-light: #60a5fa;--color-physics-rgb: 59, 130, 246;--color-math: #ec4899;--color-math-light: #f472b6;--color-math-rgb: 236, 72, 153;--color-biology: #10b981;--color-biology-light: #34d399;--color-biology-rgb: 16, 185, 129;--color-roulette: #f59e0b;--color-roulette-light: #fbbf24;--color-roulette-rgb: 245, 158, 11;--social-youtube: #ff0000;--social-whatsapp: #25d366;--social-twitter: #000000;--social-instagram: #e1306c}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-40px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(40px)}to{opacity:1;transform:translate(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}header{position:sticky;top:0;z-index:1000;background:#fffffffa;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--outline);transition:all var(--transition-normal)}nav{display:flex;align-items:center;justify-content:space-between;max-width:var(--max-width-content);margin:0 auto;padding:var(--spacing-sm) var(--container-padding-x);min-height:60px;gap:var(--spacing-lg);animation:fadeInDown .7s ease-out}.logo{display:flex;align-items:center;gap:var(--spacing-sm);text-decoration:none;color:var(--primary);font-weight:800;font-size:var(--font-size-xl);transition:all var(--transition-normal);cursor:pointer}.logo:hover{transform:scale(1.03)}.logo img{width:40px;height:40px;border-radius:var(--radius-md);object-fit:contain;transition:all var(--transition-normal)}#eduvers{color:var(--primary);letter-spacing:-.5px;font-weight:800}.nav-controls{display:flex;align-items:center;gap:var(--spacing-md)}.theme-toggle{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--radius-xl);background-color:var(--surface);border:1.5px solid var(--outline);color:var(--text-primary);cursor:pointer;font-size:var(--font-size-lg);transition:all var(--transition-normal);position:relative}.theme-toggle:before{content:"";position:absolute;inset:-2px;border-radius:var(--radius-xl);background:transparent;opacity:0;transition:opacity var(--transition-normal);z-index:-1}.theme-toggle:hover{background-color:var(--primary);color:var(--text-on-primary);border-color:var(--primary);transform:scale(1.08)}.theme-toggle:active{transform:scale(.95)}.language-dropdown{position:relative}.language-btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-xl);background-color:var(--surface);border:1px solid var(--outline);color:var(--text-primary);cursor:pointer;font-size:var(--font-size-base);font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);list-style:none;position:relative;height:44px}.language-btn:hover{background-color:var(--primary);color:var(--text-on-primary);border-color:var(--primary);transform:translateY(-1px)}.language-btn:focus-visible{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #667eea1a}.language-btn i:last-child{font-size:var(--font-size-xs);transition:transform .3s cubic-bezier(.4,0,.2,1)}.language-dropdown[open] .language-btn i:last-child{transform:rotate(180deg)}.dropdown-menu{display:none;position:absolute;top:100%;right:0;margin-top:var(--spacing-sm);background-color:var(--background);border:1px solid var(--outline);border-radius:var(--radius-lg);overflow:hidden;z-index:1001;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);animation:slideInRight .3s cubic-bezier(.4,0,.2,1)}.language-dropdown[open] .dropdown-menu{display:block}.dropdown-menu li{list-style:none}.dropdown-menu a{display:block;padding:var(--spacing-md) var(--spacing-lg);color:var(--text-primary);text-decoration:none;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.dropdown-menu a:hover,.dropdown-menu a.active{background-color:var(--secondary);color:var(--primary);font-weight:600}.dropdown-menu a:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--primary)}.subjects-section{padding:var(--spacing-3xl) 0}.subjects-section h2{font-size:var(--font-size-4xl);font-weight:900;color:var(--text-primary);margin-bottom:var(--spacing-2xl);text-align:center;line-height:var(--line-height-tight);letter-spacing:-.8px;animation:fadeInUp .7s ease-out .1s both}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--spacing-2xl);margin-bottom:var(--spacing-3xl)}.subject-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-lg);padding:var(--spacing-2xl) var(--spacing-xl);text-decoration:none;border-radius:var(--radius-2xl);background:var(--surface);border:2px solid var(--outline);color:var(--text-primary);transition:all var(--transition-normal);min-height:260px;position:relative;overflow:hidden;cursor:pointer;animation:fadeInUp .7s ease-out both}.subject-card:nth-child(1){animation-delay:.2s}.subject-card:nth-child(2){animation-delay:.25s}.subject-card:nth-child(3){animation-delay:.3s}.subject-card:nth-child(4){animation-delay:.35s}.subject-card:nth-child(1) .icon-container{background:var(--color-physics)}.subject-card:nth-child(1):hover{border-color:var(--color-physics)}.subject-card:nth-child(2) .icon-container{background:var(--color-math)}.subject-card:nth-child(2):hover{border-color:var(--color-math)}.subject-card:nth-child(3) .icon-container{background:var(--color-biology)}.subject-card:nth-child(3):hover{border-color:var(--color-biology)}.subject-card:nth-child(4) .icon-container{background:var(--color-roulette)}.subject-card:nth-child(4):hover{border-color:var(--color-roulette)}.subject-card:before{content:"";position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:transparent;opacity:0;transition:all var(--transition-normal);pointer-events:none}.subject-card:hover{transform:translateY(-12px) scale(1.01)}.subject-card:hover:before{top:-25%;right:-25%;opacity:1}.icon-container{display:flex;align-items:center;justify-content:center;width:100px;height:100px;border-radius:var(--radius-2xl);color:var(--text-on-primary);font-size:3rem;position:relative;z-index:2;transition:all var(--transition-normal)}.subject-card:hover .icon-container{transform:scale(1.15) rotate(-8deg)}.subject-card h3{font-size:var(--font-size-xl);font-weight:700;text-align:center;color:var(--text-primary);margin:0;position:relative;z-index:2;transition:all var(--transition-normal);letter-spacing:-.4px}.subject-card:nth-child(1):hover h3{color:var(--color-physics)}.subject-card:nth-child(2):hover h3{color:var(--color-math)}.subject-card:nth-child(3):hover h3{color:var(--color-biology)}.subject-card:nth-child(4):hover h3{color:var(--color-roulette)}.about-section{padding:var(--spacing-3xl) 0;border-top:2px solid var(--outline)}.about-section h2{font-size:var(--font-size-4xl);font-weight:900;color:var(--text-primary);margin-bottom:var(--spacing-2xl);text-align:center;line-height:var(--line-height-tight);letter-spacing:-.8px;animation:fadeInUp .7s ease-out .1s both}.about-content{display:grid;grid-template-columns:1fr;gap:var(--spacing-2xl);align-items:start}.about-text{display:flex;flex-direction:column;gap:var(--spacing-lg);animation:slideInLeft .7s ease-out .25s 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0;position:relative;z-index:1;letter-spacing:-.3px}.feature-card p{font-size:var(--font-size-sm);color:var(--text-secondary);line-height:var(--line-height-normal);margin:0;position:relative;z-index:1;font-weight:500}.cta-buttons{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap;margin-top:var(--spacing-3xl);animation:slideInRight .7s ease-out .4s both}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-lg) var(--spacing-2xl);font-size:var(--font-size-base);font-weight:700;text-decoration:none;border-radius:var(--radius-xl);cursor:pointer;line-height:1.2;min-height:52px;border:2px solid transparent;transition:all var(--transition-normal);font-family:inherit;position:relative;overflow:hidden;letter-spacing:-.3px}.btn:before{content:"";position:absolute;inset:0;background:transparent;opacity:0;transition:opacity var(--transition-normal);pointer-events:none}.btn-primary{background:var(--primary);border-color:transparent;color:var(--text-on-primary)}.btn-primary:hover{transform:translateY(-4px)}.btn-primary:hover:before{opacity:1}.btn-primary:active{transform:translateY(-1px)}.btn-secondary{background-color:transparent;border-color:var(--primary);color:var(--primary);font-weight:600}.btn-secondary:hover{background:transparent;border-color:var(--primary);color:var(--primary);transform:translateY(-4px)}.btn-secondary:active{transform:translateY(-1px)}@media(max-width:768px){nav{padding:var(--spacing-xs) var(--container-padding-x-mobile);min-height:56px;gap:var(--spacing-md)}.nav-controls{gap:var(--spacing-sm)}.logo{font-size:var(--font-size-base);gap:var(--spacing-xs)}.logo img{width:32px;height:32px}.theme-toggle,.language-btn{height:40px;font-size:var(--font-size-base);padding:var(--spacing-xs) var(--spacing-sm)}.subjects-section h2,.about-section h2,.social-section h2{font-size:var(--font-size-3xl);margin-bottom:var(--spacing-xl)}.subjects-grid{grid-template-columns:1fr;gap:var(--spacing-lg)}.subject-card{flex-direction:row;padding:var(--spacing-lg) var(--spacing-md);min-height:auto;gap:var(--spacing-lg);justify-content:flex-start;align-items:center}.icon-container{width:70px;height:70px;font-size:1.8rem;flex-shrink:0}.subject-card h3{font-size:var(--font-size-base);text-align:left;flex:1;margin:0;font-weight:600}.features-grid{grid-template-columns:1fr;gap:var(--spacing-md)}.feature-card{padding:var(--spacing-lg)}.feature-icon{width:60px;height:60px;font-size:var(--font-size-xl)}.feature-card h3{font-size:var(--font-size-base)}.feature-card p{font-size:var(--font-size-sm)}.cta-buttons{flex-direction:column;gap:var(--spacing-sm)}.btn{width:100%;padding:var(--spacing-md) var(--spacing-lg);min-height:44px}.main-description{font-size:var(--font-size-base)}}@media(max-width:480px){nav{padding:var(--spacing-xs) var(--spacing-sm);gap:var(--spacing-sm)}.logo{font-size:var(--font-size-sm)}.logo img{width:28px;height:28px}.subjects-section,.about-section,.social-section{padding:var(--spacing-xl) 0}.subjects-section h2,.about-section h2,.social-section h2{font-size:var(--font-size-2xl);margin-bottom:var(--spacing-md)}.subject-card{padding:var(--spacing-md);gap:var(--spacing-md);min-height:auto;align-items:center}.icon-container{width:60px;height:60px;font-size:1.5rem;flex-shrink:0}.subject-card h3{font-size:var(--font-size-base);text-align:left;flex:1;margin:0;font-weight:700}.feature-card{padding:var(--spacing-md)}.feature-icon{width:55px;height:55px;font-size:var(--font-size-lg);margin-bottom:var(--spacing-sm)}.feature-card h3{font-size:var(--font-size-base)}.feature-card p{font-size:var(--font-size-xs);line-height:var(--line-height-normal)}.main-description{font-size:var(--font-size-sm)}.cta-buttons{margin-top:var(--spacing-md)}.btn{padding:var(--spacing-sm) var(--spacing-md);min-height:40px;font-size:var(--font-size-sm)}.subject-card:hover .icon-container{transform:scale(1.1) rotate(-8deg)}}.social-section{padding:var(--spacing-3xl) 0;border-top:2px solid var(--outline);background:transparent}.social-section h2{font-size:var(--font-size-4xl);font-weight:900;color:var(--text-primary);margin-bottom:var(--spacing-2xl);text-align:center;line-height:var(--line-height-tight);letter-spacing:-.8px;animation:fadeInUp .7s ease-out .1s both}.social-subtitle{font-size:var(--font-size-lg);color:var(--text-secondary);text-align:center;margin:0 auto var(--spacing-2xl) auto;max-width:600px;animation:fadeInUp .7s ease-out .15s both;font-weight:500;line-height:var(--line-height-relaxed)}.social-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--spacing-lg)}.social-link{display:flex;flex-direction:row;align-items:center;justify-content:flex-start;gap:var(--spacing-md);padding:var(--spacing-lg);border-radius:var(--radius-2xl);background:var(--surface);border:2px solid var(--outline);text-decoration:none;color:var(--text-primary);transition:all var(--transition-normal);position:relative;overflow:hidden;animation:fadeInUp .7s ease-out both;cursor:pointer;min-height:100px}.social-link:nth-child(1){animation-delay:.2s}.social-link:nth-child(2){animation-delay:.25s}.social-link:nth-child(3){animation-delay:.3s}.social-link:nth-child(4){animation-delay:.35s}.social-link:before{content:"";position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:transparent;opacity:0;transition:all var(--transition-normal);pointer-events:none}.social-icon{display:flex;align-items:center;justify-content:center;width:80px;height:80px;border-radius:var(--radius-2xl);color:var(--text-on-primary);font-size:2.5rem;position:relative;z-index:2;flex-shrink:0;transition:all var(--transition-normal)}.social-link.youtube .social-icon{background:var(--social-youtube)}.social-link.whatsapp .social-icon{background:var(--social-whatsapp)}.social-link.twitter .social-icon{background:var(--social-twitter)}.social-link.instagram .social-icon{background:var(--social-instagram)}.social-content{display:flex;flex-direction:row;gap:var(--spacing-md);position:relative;z-index:2;flex:1;text-align:left;align-items:center}.social-name{font-size:var(--font-size-base);font-weight:700;color:var(--text-primary);letter-spacing:-.3px;margin:0;transition:all var(--transition-normal);white-space:nowrap}.social-link:hover{transform:translateY(-12px) scale(1.01)}.social-link:hover:before{top:-25%;right:-25%;opacity:1}.social-link.youtube:hover{border-color:var(--social-youtube)}.social-link.youtube:hover .social-icon{transform:scale(1.15) rotate(-8deg)}.social-link.youtube:hover .social-name{color:var(--social-youtube)}.social-link.whatsapp:hover{border-color:var(--social-whatsapp)}.social-link.whatsapp:hover .social-icon{transform:scale(1.15) rotate(-8deg)}.social-link.whatsapp:hover .social-name{color:var(--social-whatsapp)}.social-link.twitter:hover{border-color:var(--social-twitter)}.social-link.twitter:hover .social-icon{transform:scale(1.15) rotate(-8deg)}.social-link.twitter:hover .social-name{color:var(--social-twitter)}.social-link.instagram:hover{border-color:var(--social-instagram)}.social-link.instagram:hover .social-icon{transform:scale(1.15) rotate(-8deg)}.social-link.instagram:hover .social-name{color:var(--social-instagram)}footer{background:var(--surface);border-top:2px solid var(--outline);padding:var(--spacing-2xl) var(--container-padding-x);margin-top:var(--spacing-3xl)}.footer-content{max-width:var(--max-width-content);margin:0 auto;display:flex;align-items:center;justify-content:center;gap:var(--spacing-lg)}.footer-logo{display:flex;align-items:center;gap:var(--spacing-sm);font-weight:700;font-size:var(--font-size-lg);color:var(--primary)}.footer-logo img{width:30px;height:30px;border-radius:var(--radius-md);object-fit:contain}@media(max-width:768px){.social-subtitle{font-size:var(--font-size-base);margin-bottom:var(--spacing-2xl)}.social-links{grid-template-columns:1fr;gap:var(--spacing-lg)}.social-link{flex-direction:row;padding:var(--spacing-lg) var(--spacing-md);gap:var(--spacing-lg);justify-content:flex-start;align-items:center}.social-icon{width:70px;height:70px;font-size:1.8rem;flex-shrink:0}.social-name{font-size:var(--font-size-base);font-weight:700}.social-description{font-size:var(--font-size-xs)}footer{padding:var(--spacing-xl) var(--container-padding-x-mobile)}}@media(max-width:480px){.social-section h2{font-size:var(--font-size-2xl);margin-bottom:var(--spacing-md)}.social-subtitle{font-size:var(--font-size-sm);margin-bottom:var(--spacing-lg)}.social-link{flex-direction:row;padding:var(--spacing-md);gap:var(--spacing-md);min-height:auto;align-items:center}.social-icon{width:60px;height:60px;font-size:1.5rem;flex-shrink:0}.social-name{font-size:var(--font-size-base);text-align:left;flex:1;margin:0;font-weight:700}.social-description{font-size:var(--font-size-xs);display:none}.social-content{gap:var(--spacing-xs);flex-direction:column;align-items:flex-start}footer{padding:var(--spacing-lg) var(--spacing-sm)}.footer-logo{gap:var(--spacing-xs)}.footer-logo img{width:24px;height:24px}.footer-logo{font-size:var(--font-size-base)}}[data-theme=dark] .social-section{background:transparent}[data-theme=dark] .social-link{background:#34415466}[data-theme=dark] .social-link:hover{background:#34415499}[data-theme=dark] footer{background:#3441544d}[data-theme=dark] header{background:#0f172af2;border-bottom-color:#4755694d}[data-theme=dark] .subject-card{background:#3441544d}[data-theme=dark] .subject-card:hover{background:#34415480}[data-theme=dark] .feature-card{background:#3441544d}[data-theme=dark] .feature-card:hover{background:#34415480}[data-theme=dark] .btn-secondary{border-color:var(--primary-light);color:var(--primary-light)}[data-theme=dark] .btn-secondary:hover{background-color:#8b7cb626}.no-transitions,.no-transitions *{transition:none!important;animation:none!important}