/* Modern button with subtle glow */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 14px 26px;
  border: none;
  border-radius: 12px;
  color: #fff;
  cursor: pointer;
  z-index: 0;
  font-weight: 600;
  font-size: large;
  letter-spacing: .2px;
  text-decoration: none;
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: #1b1b1b;
  border-radius: inherit;
}

/* glow */
.btn::before {
  content: "";
  position: absolute;
  inset: -2px;
  z-index: -2;
  background: linear-gradient(45deg, var(--accent, #f44a10), #ffffff);
  background-size: 600%;
  filter: blur(10px);
  border-radius: inherit;
  opacity: 0;
  transition: opacity .3s ease-in-out;
  animation: btn-glow 18s linear infinite;
}

@keyframes btn-glow {
  0% { background-position: 0 0; }
  50% { background-position: 400% 0; }
  100% { background-position: 0 0; }
}

/* hover */
.btn:hover::before { opacity: 1; }
.btn:active::after { background: transparent; }
.btn:active { color: #000; }

/* Variants */
.btn-primary { --accent: #f44a10; }


.btn-secondary { --accent: #1e3c72; color: #000; }
.btn-secondary::after {
  background-color: transparent;
  border: 1px solid rgba(215,226,255,0.55);
}
.btn-secondary:hover::after {
  background-color: rgba(30,60,114,0.18);
  border-color: rgba(215,226,255,0.8);
}