#surface-cercle{background:#b6d5fb;border-radius:50%;width:160px;height:160px;border:3px solid #033061;margin:20px auto}#surface-cercle #rayon{width:80px;font-size:18px;color:#033061;border-bottom:2px solid #033061;position:relative;top:60px;padding-left:10px;text-align:center;font-family:calculatrice,sans-serif;letter-spacing:3px}@media (max-width:670px){.w300{width:190px}}