.btn-success { background:#8cc63e; border-color:#8cc63e; color:#0a140e; }
.btn-success:hover { filter:brightness(.95); }
.masthead {
  min-height: 100vh;
  width: 100%;
  margin: 0;
  padding: 0;
  background-size: cover;
  background-position: center;
}
.masthead h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  color: #fff;
}
.masthead p {
  color: rgba(255,255,255,.9);
}
/* Apply black background to the whole home page */
.black-bg {
  background: #000;   /* true black, change to #0b0f0d for softer */
}

/* Remove white page wrapper spacing */
.black-bg .content,
.black-bg .container {
  background: transparent;
}