:root{--primary:#7c3aed;--primary-dark:#6d28d9;--secondary:#ec4899;--secondary-dark:#db2777;--text-color:#1f2937;--bg-color:#ffffff;--card-bg:#f3f4f6;--border-color:#e5e7eb;--gray:#6b7280}html.dark{--primary:#9333ea;--primary-dark:#a855f7;--secondary:#f472b6;--secondary-dark:#f9a8d4;--text-color:#f3f4f6;--bg-color:#111827;--card-bg:#1f2937;--border-color:#374151;--gray:#9ca3af}body{font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,'Open Sans','Helvetica Neue',sans-serif;color:var(--text-color);background-color:var(--bg-color);line-height:1.6;transition:background-color .3s ease,color .3s ease}.gradient-text{background-clip:text;-webkit-background-clip:text;color:transparent;background-image:linear-gradient(90deg,var(--primary),var(--secondary))}.gradient-bg{background-image:linear-gradient(90deg,var(--primary),var(--secondary))}.button-primary{transition:all .3s ease}.button-primary:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05)}.card-hover{transition:all .3s ease}.card-hover:hover{transform:translateY(-5px);box-shadow:0 20px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04)}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .6s ease-out forwards}a:focus,button:focus{outline:2px solid var(--primary);outline-offset:2px}.card-hover,nav{transition:background-color .3s ease,color .3s ease,transform .3s ease,box-shadow .3s ease}.logo-img{height:2rem;width:auto}html.dark [data-id=course-desc-date]>span:first-child{color:var(--text-color)}html.dark #who-is-this-for{background-color:var(--card-bg)}html.dark #who-is-this-for h2{color:var(--text-color)}html.dark #who-is-this-for .card-hover{background-color:var(--bg-color)}html.dark #who-is-this-for .card-hover p{color:var(--text-color)}html.dark #who-is-this-for .card-hover strong{color:var(--text-color)}.popup-overlay{animation:fadeIn .3s ease forwards}@keyframes fadeIn{from{opacity:0}to{opacity:1}}body.popup-open{overflow:hidden}@media (max-width:640px){.popup-overlay>div{width:95%;margin:0 10px}}#course-content .message-bubble{transition:all .3s ease}#course-content .message-bubble:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05)}html.dark #course-content .bg-amber-300{color:#1a202c}#testimonials .rounded-xl img{max-width:100%;box-shadow:0 2px 8px rgba(0,0,0,.1);border:1px solid var(--border-color)}#testimonials .rounded-xl:hover{transform:translateY(-2px);transition:transform .3s ease}