.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--touch-min);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: var(--radius-none);
  cursor: pointer;
  overflow: hidden;
  transition: transform 220ms var(--ease-spring), background-color 220ms ease,
    border-color 220ms ease, color 220ms ease, box-shadow 220ms ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.btn:active {
  transform: scale(0.97);
  box-shadow: none;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-on-primary);
  border-color: var(--color-accent);
}

.btn--primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.24),
    transparent
  );
  transform: translateX(-160%) skewX(-22deg);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--primary:hover::after {
  animation: shimmer 580ms ease forwards;
}

@keyframes shimmer {
  0% {
    transform: translateX(-160%) skewX(-22deg);
  }

  100% {
    transform: translateX(260%) skewX(-22deg);
  }
}

.btn--secondary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover {
  background: var(--color-inverse);
  border-color: var(--color-inverse);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--ghost:hover {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.btn--ghost-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn--ghost-white:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.btn--white:hover {
  background: var(--color-surface-dim);
}

.btn--full {
  width: 100%;
}

.btn__icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
  .btn:hover {
    transform: none;
    box-shadow: none;
  }

  .btn--primary:hover::after {
    animation: none;
  }
}

@media (hover: none) {
  .btn:hover {
    transform: none;
    box-shadow: none;
  }

  .btn--primary:hover::after {
    animation: none;
  }
}