crud.css

body {
 box-sizing: border-box;
 background: #a0a0a0; 
}

/* login */

#lForm {
   width: 40%;
   margin: auto auto;
   height: 40vh;
   padding: 3rem;                                                                                                                                                                                                                                                                                                                                                                                                        
   margin-top: 20vh;
   text-align: center;
   border: 1px solid black;
   border-radius: 1rem;
   background: rgb(131, 128, 120);
  }                                                                 

  #lForm input {
    width: 20rem;
    height: 2vh
  }

/* crud */
#crudMain {
  width: 80%;
  margin: 5rem;
  margin: auto;
  padding: 2rem;
  text-align: center;
  /* border: 1px solid  */
}

#taskList {
  display: none;
  border: 1px solid black;
  border-radius: 1rem;
  background-image: linear-gradient(rgba(255, 255, 255, .6), rgba(255, 255, 255, .7)), url(images/dust.jpg);
}

#taskList img {
 height: .7rem;
 width: .7rem
}

#taskList li {
  text-align: center;
  width: 80%;
 list-style: none;
 display: flex;
 justify-content: space-between;
 /* width: 20rem */;
 margin: 1rem;
 margin-left: 7rem
}

/* #taskList li:nth-child(even) {
color: blue;
} */

#crudMain #btn {
  position: absolute;
  bottom: 0;
  height: 5vh;
  background: black;
  color: red
}

#taskBtn {
  background: green;
  height: 5vh;
  color: white
}
/* signup */

#sForm {
 text-align: center;
 padding: 1rem;
 /* border: 1px solid black; */
 width: 60%;
 margin: auto;
 margin-top: 5rem
}

.sFormChildren {
 margin: 1rem
}

#mail, #sex {
  margin-right: -1.9rem
}

#age {
  margin-right: -1.3rem
}

#span {
  position: absolute;
  top: 2rem;
  right: 40rem;
  display: flex;
  justify-content: space-between;
  width: 23rem;
  color: rgb(11, 37, 93)
 }
 
 #span input {
   background: rgb(11, 37, 93);
   color: white
 }