body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #0e1f1c;
  color: #ffffff;
}
header {
  padding: 60px;
  text-align: center;
  background: linear-gradient(180deg,#0e1f1c,#123c36);
}
h1 { font-size: 3em; margin-bottom: 10px; }
h2 { color: #4fd1c5; }
section { padding: 60px; max-width: 1100px; margin: auto; }
footer {
  background:#081412;
  padding:30px;
  text-align:center;
  font-size:0.9em;
  color:#cccccc;
}
a.button {
  display:inline-block;
  padding:14px 26px;
  background:#4fd1c5;
  color:#081412;
  text-decoration:none;
  font-weight:bold;
  border-radius:30px;
}