.hero-gradient{background:linear-gradient(135deg,#4f46e5,#7c3aed 50%,#9333ea)}.feature-card:hover{box-shadow:0 20px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04);transform:translateY(-5px)}.teacher-card:hover{transform:scale(1.03)}.video-container{height:0;overflow:hidden;padding-bottom:56.25%;position:relative}.video-container iframe{height:100%;left:0;position:absolute;top:0;width:100%}.floating-button{animation:float 3s ease-in-out infinite}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}