Css button border

border: 2px solid #000;

Css button style rectangle

.placeholder-box {
  position: relative;
  display: block;
  width: 300px;
  min-height: 150px;
  margin-top: 50px;
  padding: 30px;
  border: 1px solid #888;
  border-radius: 10px;
  box-sizing: border-box;
  box-shadow: 0 0 8px 0 rgba(0,0,0,0.25);
}

.placeholder-box p {
  text-align: center;
  margin: 0 0 15px;
}

.placeholder-box ul {
  margin: 0;
}

/* Button */

button {
 display: block;
 border: solid white;
 border-width: 0 10px;
 border-radius: 0;
 background: green;
 color: white;
 font-size: 18px;
 margin: -60px auto 15px;
 padding: 15px;
}

Source: stackoverflow.com

Similar codes

4 votes301 views2 answers
Stop text from wrapping
CSS
0 vote312 views4 answers
How to pass html number to css
CSS
2 votes304 views2 answers
Remove bg color with css
CSS
2 votes425 views2 answers
No gutter in bootstrap css for row
CSS Bootstrap
1 vote305 views1 answer
Css animate border bottom left to right
CSS
3 votes304 views1 answer
Hover apply lighter color css
CSS
0 vote308 views1 answer
Youtube-dl forbidden
CSS
0 vote285 views5 answers
Add css to javafx fxml
CSS
0 vote325 views1 answer
Position inset css
CSS
0 vote314 views1 answer
Delete files with help of .getignore
CSS