Answers for "input decoration css"

text-decoration css

h1 {
  text-decoration: overline;
}

h2 {
  text-decoration: line-through;
}

h3 {
  text-decoration: underline;
}

h4 {
  text-decoration: underline overline;
}

add border to input css

border: none;
border-bottom: 1px solid blue;

form css

#form {

    border: 1px solid black;
    padding: 1.5%;
    text-align: center;
    

}