.input10 {
max-width: 200px;
height: 30px;
border: 2px solid transparent;
outline: none;
border-bottom: 2px solid #3f3f3f;
caret-color: #3f3f3f;
background-color: #212121;
padding: 5px;
transition: .5s linear;
font-family: monospace;
letter-spacing: 1px;
}
.input10:focus {
border: 2px solid #fa4753;
caret-color: #fa4753;
color: #fa4753;
box-shadow: 4px 4px 10px #070707;
}
.input10:focus::placeholder {
color: #fa4753;
}