style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');
body {
 background-color: #2c2f33;
font-family: 'Roboto', sans-serif;
}
#captchaBackground {
 height: 220px;
 width: 250px;
 background-color: #2d3748;
 display: flex;
 align-items: center;
 justify-content: center;
 flex-direction: column;
}
#captchaHeading {
 color: #57F287}
#captcha {
 height: 80%;
 width: 80%;
 font-size: 30px;
 letter-spacing: 3px;
 margin: auto;
 display: block;
 top: 0;
 bottom: 0;
 left: 0;
 right: 0;
}
.center {
 display: flex;
 flex-direction: column;
 align-items: center;
}
#submitButton {
 margin-top: 2em;
 margin-bottom: 2em;
 background-color: #08e5ff;
 border: 0px;
 font-weight: bold;
}
#refreshButton {
 background-color: #08e5ff;
 border: 0px;
 font-weight: bold;
}
#textBox {
 height: 25px;
}
.incorrectCaptcha {
 color: #FF0000;
}
.correctCaptcha {
 color: #7FFF00;
}