.main-heading {
  text-align: center;
  font-size: 28px;
  font-weight: 600;
  color: white;
  flex-shrink: 0;
  margin-bottom: 25px;
}

.button-group {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000000;
  opacity: 80%;
  color: white;
  border: 1px solid #685c7b;
  border-radius: 100px;
  padding: 9px 179px;
  margin: 0.25rem 0;
  font-weight: 400;
  font-size: 16px;
  text-align: center;
  width: 420px;
  min-height: 56px;
  white-space: nowrap;
  flex-shrink: 0;
}

.button-group:hover {
  color: white;
  text-decoration: none;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.button-group:focus {
  color: white;
  text-decoration: none;
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

@media (max-width: 768px) {
  .main-heading {
    font-size: 22px;
    padding: 0 20px;
    margin-bottom: 15px;
  }

  .button-group {
    width: 420px;
    max-width: calc(100vw - 30px);
    padding: 12px 20px;
    font-size: 14px;
    min-height: 48px;
    white-space: normal;
    text-align: center;
  }
}