/* /styles/components/button.css */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 1.75rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: -0.01em;
  border-radius: var(--radius-pill);
  transition: transform var(--duration-base) var(--ease-out-expo),
              background var(--duration-fast) var(--ease-out-quart),
              color var(--duration-fast) var(--ease-out-quart),
              box-shadow var(--duration-base) var(--ease-out-quart);
  isolation: isolate;
  overflow: hidden;
  white-space: nowrap;
  cursor: pointer;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-aurora);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out-quart);
  z-index: -1;
}

.btn:hover::before { opacity: 1; }

.btn--primary {
  background: var(--accent-primary);
  color: var(--bg-base);
  box-shadow: 0 1px 0 oklch(1 0 0 / 0.15) inset,
              0 12px 32px -8px oklch(0.62 0.130 55 / 0.45);
}

.btn--primary:hover {
  color: var(--bg-base);
  transform: translateY(-2px);
  box-shadow: 0 1px 0 oklch(1 0 0 / 0.2) inset,
              0 20px 48px -10px oklch(0.62 0.130 55 / 0.6);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn--ghost:hover {
  background: oklch(1 0 0 / 0.05);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn--ghost::before { display: none; }

.btn--whatsapp {
  background: oklch(0.65 0.180 145);
  color: oklch(0.10 0.015 50);
  box-shadow: 0 1px 0 oklch(1 0 0 / 0.2) inset,
              0 12px 32px -8px oklch(0.65 0.180 145 / 0.45);
}

.btn--whatsapp:hover {
  background: oklch(0.72 0.190 145);
  transform: translateY(-2px);
  box-shadow: 0 1px 0 oklch(1 0 0 / 0.25) inset,
              0 20px 48px -10px oklch(0.65 0.180 145 / 0.6);
}

.btn--whatsapp::before { display: none; }

.btn--lg { padding: 1.25rem 2.25rem; font-size: var(--fs-base); }
.btn--sm { padding: 0.65rem 1.25rem; font-size: var(--fs-xs); }

.btn[data-magnetic] {
  transition: transform 350ms var(--ease-out-expo),
              background var(--duration-fast) var(--ease-out-quart),
              box-shadow var(--duration-base) var(--ease-out-quart);
}

.btn .btn__icon {
  width: 1.1em;
  height: 1.1em;
  transition: transform var(--duration-base) var(--ease-out-expo);
}

.btn:hover .btn__icon {
  transform: translateX(3px);
}

.btn:active { transform: scale(0.97) translateY(0); }

.btn:focus-visible {
  outline: 2px solid var(--accent-glow);
  outline-offset: 4px;
}