html {height: 100%;}
html, body {margin: 0 0 0 0; padding: 0 0 0 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; font-size: 112.8%;
}

body {font-size: 1rem;
  background: radial-gradient(circle at top center, #5c1a1a, #000);
  background-repeat: no-repeat;}
h1 {font-size: 3rem; font-weight: 700;}
h2 {font-size: 2.5rem; font-weight: 700;}
h3 {font-size: 1.9rem;}
h4 {font-size: 1.3rem;}

.pgwdth {width: 100%; max-width: 1340px; margin: 60px auto;
  padding: 25px 15px 35px 15px; color: #fff}
.hghlt {border-radius: 8px; border: 1px solid #b61919;}

.btn {border-radius: 4px; border: 1px solid #eee;
  background: radial-gradient(circle at bottom center,
  rgba(212, 248, 255, 0.2) 0%, rgba(89, 219, 255, 0.2) 100%);
  padding: 10px 20px; margin: 10px 10%; text-decoration: none; color: #fff;}

.flxbox {display: flex; flex-direction: row; justify-content: center;}

.cntr {text-align: center;}