.bv-btn {
  /* Light defaults (can be overridden via inline vars) */
  --bv-bg: #0b2a3c;
  --bv-fg: #ffffff;
  --bv-bd: transparent;

  --bv-bg-hover: #0a2433;
  --bv-fg-hover: #ffffff;
  --bv-bd-hover: transparent;

  --bv-bg-active: #081f2c;
  --bv-fg-active: #ffffff;
  --bv-bd-active: transparent;

  --bv-focus: rgba(11, 42, 60, 0.35);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;

  padding: .75rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--bv-bd);

  background: var(--bv-bg);
  color: var(--bv-fg);
  text-decoration: none;
  cursor: pointer;

  line-height: 1;
  font-weight: 600;

  transition: background-color .15s ease, color .15s ease, border-color .15s ease, transform .02s ease, box-shadow .15s ease;
}

.bv-btn:hover {
  background: var(--bv-bg-hover);
  color: var(--bv-fg-hover);
  border-color: var(--bv-bd-hover);
}

.bv-btn:active {
  background: var(--bv-bg-active);
  color: var(--bv-fg-active);
  border-color: var(--bv-bd-active);
  transform: translateY(1px);
}

.bv-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--bv-focus);
}

.bv-btn[aria-disabled="true"],
.bv-btn:disabled {
  opacity: .55;
  cursor: not-allowed;
  pointer-events: none;
}

/* Dark mode remap (expects --bv-*-dark) */
html.hm-dark .bv-btn {
  background: var(--bv-bg-dark, #ffffff);
  color: var(--bv-fg-dark, #0b0f14);
  border-color: var(--bv-bd-dark, rgba(255,255,255,.25));
  box-shadow: none;
}

html.hm-dark .bv-btn:hover {
  background: var(--bv-bg-hover-dark, rgba(255,255,255,.90));
  color: var(--bv-fg-hover-dark, #0b0f14);
  border-color: var(--bv-bd-hover-dark, rgba(255,255,255,.35));
}

html.hm-dark .bv-btn:active {
  background: var(--bv-bg-active-dark, rgba(255,255,255,.82));
  color: var(--bv-fg-active-dark, #0b0f14);
  border-color: var(--bv-bd-active-dark, rgba(255,255,255,.45));
}

html.hm-dark .bv-btn:focus-visible {
  box-shadow: 0 0 0 4px var(--bv-focus-dark, rgba(255,255,255,.25));
}