body{margin:0;font-family:Poppins,sans-serif;background:linear-gradient(135deg,#72edf2 10%,#5151e5);display:flex;justify-content:center;align-items:center;height:100vh}.bmi-card{background:#fff3;background:#b9abab33;border-radius:20px;padding:30px;box-shadow:0 8px 32px #1f26875e;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.18);text-align:center;max-width:400px;width:100%;color:#fff}.bmi-card h2{font-size:2rem;margin:30px;color:#fff;letter-spacing:.3rem;font-family:Courier New,Courier,monospace;font-weight:700}.input-group{margin-bottom:15px}.input-group label{display:block;margin-bottom:5px;color:#f0f0f0}.input-group input{width:100%;padding:10px;border:none;border-radius:10px;font-size:1rem;background:#ffffff4d;color:#fff;outline:none}.input-group input::placeholder{color:#e0e0e0}.result{margin:30px}.result h3{font-size:1.5rem;margin:10px 0;color:green}.result h5{font-size:1rem;color:gold;text-transform:uppercase}