.buy-button {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 76px;
  padding: 14px 34px;
  border: 1px solid rgba(191,223,255,0.45);
  border-radius: 0;
  background: linear-gradient(135deg, var(--obsidian-light), #0D3D7A);
  color: var(--ivory);
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.16em;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow:
    0 12px 30px rgba(0,0,0,0.24),
    0 0 0 1px rgba(30,123,255,0.08) inset;
  transition:
    background 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    transform 0.2s ease;
}

.buy-button-shipping {
  padding: 4px 12px;
  background: var(--champagne-light);
  color: var(--obsidian);
  font-size: 0.64rem;
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0.18em;
  box-shadow: 0 4px 12px rgba(2,11,31,0.2);
}

.buy-button:hover {
  background: linear-gradient(135deg, #0D3670, var(--electric-blue));
  border-color: rgba(191,223,255,0.8);
  box-shadow:
    0 16px 36px rgba(0,0,0,0.28),
    0 0 24px rgba(30,123,255,0.2);
  transform: translateY(-2px);
}

.buy-button:focus-visible {
  outline: 2px solid var(--champagne-light);
  outline-offset: 4px;
}

@media (max-width: 600px) {
  .buy-button {
    width: 100%;
    max-width: 420px;
    min-height: 80px;
    padding: 14px 22px;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
  }

  .buy-button-shipping {
    font-size: 0.62rem;
    letter-spacing: 0.15em;
  }
}