/* =============================================================================
   FILE: resources/css/components/button.css
   Frontend Spec Section 5.3 — Button
============================================================================= */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-target-min);
  padding-inline: var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  transition: background-color var(--ease-standard), border-color var(--ease-standard), color var(--ease-standard), opacity var(--ease-standard);
  width: 100%;
}

.btn--primary {
  background-color: var(--color-brand);
  color: #fff;
}
.btn--primary:active {
  background-color: var(--color-brand-dark);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-brand);
  border: 1.5px solid var(--color-brand);
}
.btn--secondary:active {
  background-color: var(--color-brand-tint);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-brand);
  width: auto;
  min-height: auto;
  padding-inline: 0;
  font-weight: var(--weight-medium);
}

.btn--destructive {
  background-color: transparent;
  color: var(--color-danger);
}
.btn--destructive:active {
  background-color: var(--color-danger-tint);
}

.btn:disabled {
  opacity: 0.4;
  pointer-events: none;
}

.btn__spinner {
  display: none;
}

.btn.is-loading .btn__label {
  visibility: hidden;
}

.btn.is-loading .btn__spinner {
  display: block;
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-top-color: transparent;
  animation: btn-spin 600ms linear infinite;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .btn.is-loading .btn__spinner {
    animation-duration: 1200ms;
  }
}