:root{--font-inter: "Inter", system-ui, -apple-system, sans-serif}body{margin:0;font-family:var(--font-inter);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.feature-card{background:#fff;border-radius:10px;padding:20px;box-shadow:0 6px 18px #0000000d;transition:transform .15s ease,box-shadow .15s ease}.feature-card:hover{transform:translateY(-2px);box-shadow:0 10px 26px #00000014}.feature-card h3{font-size:16.5px;font-weight:600;margin-bottom:8px;color:#111827}.feature-card p{font-size:14.5px;line-height:1.5;color:#5f6b7a}.feature-card.flashcards{border-top:3px solid #e53935}.feature-card.chat{border-top:3px solid #1e88e5}.feature-card.practice{border-top:3px solid #8e24aa}