.btn{
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px;
  background: var(--wine);
  color: var(--cream);
  border-radius: 100px;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: all .35s cubic-bezier(.2,.7,.3,1);
  border: 1px solid var(--wine);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.btn:hover{
  background: var(--wine-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(74,26,37,0.25);
}
.btn .arrow{
  transition: transform .35s;
}
.btn:hover .arrow{ transform: translateX(4px); }

.btn-outline{
  background: transparent;
  color: var(--wine);
  border: 1px solid var(--wine);
}
.btn-outline:hover{
  background: var(--wine);
  color: var(--cream);
}
@media (max-width: 560px){
  .nav .btn{ padding: 10px 18px; font-size: 13px; }
}

/* ─── BTN-BEAM — efeito de brilho giratório na borda ─── */
@keyframes spin-beam {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.btn-beam {
  position: relative;
  z-index: 1;
}

.btn-beam::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: inherit;
  padding: 1.5px; /* Espessura da borda brilhante */
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.9), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  z-index: -1;
  transition: opacity 0.3s;
}

.btn-beam:hover {
  background: var(--wine-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(74,26,37,0.25);
}

.btn-beam:hover::before {
  opacity: 1;
  animation: spin-beam 2s linear infinite;
}