Adding the following CSS to a partial, but it's showing errors and not applying as intended. Can anyone lend their expertise. Thanks so much!

//Give Now block
.give-now {
.columns {
padding-bottom: 0px;
}

.cta {
background-color: #990000;

p {
color:$white;

font-family: GeorgiaPro, georgia, serif;
font-size: 14px;
line-height: 135%;

padding-bottom: 0px;
margin-bottom: 0px;
Margin-bottom: 0px;

}

th {
padding: 42px;

}
}
}