/* Button Component */
.ui-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  border-radius: 0.375rem; /* rounded-md */
  font-size: 0.875rem; /* text-sm */
  font-weight: 500; /* font-medium */
  height: 2.5rem; /* h-10 */
  padding-left: 1rem; /* px-4 */
  padding-right: 1rem;
  transition-property: color, background-color, border-color, box-shadow;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
  position: relative;
  user-select: none;
}

.ui-button:focus-visible {
  outline: 2px solid transparent;
  outline-offset: 2px;
  box-shadow: 0 0 0 2px hsl(var(--background)), 0 0 0 4px hsl(var(--ring));
}

.ui-button:disabled {
  pointer-events: none;
  opacity: 0.5;
}

.ui-button[data-variant="default"] {
  background-color: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.ui-button[data-variant="default"]:hover:not(:disabled) {
  background-color: hsl(var(--primary) / 0.9);
}

.ui-button[data-variant="destructive"] {
  background-color: hsl(var(--destructive));
  color: hsl(var(--destructive-foreground));
}

.ui-button[data-variant="destructive"]:hover:not(:disabled) {
  background-color: hsl(var(--destructive) / 0.9);
}

.ui-button[data-variant="outline"] {
  border: 1px solid hsl(var(--border));
  background-color: transparent;
  color: hsl(var(--foreground));
}

.ui-button[data-variant="outline"]:hover:not(:disabled) {
  background-color: hsl(var(--accent));
  color: hsl(var(--accent-foreground));
}

.ui-button[data-variant="secondary"] {
  background-color: hsl(var(--secondary));
  color: hsl(var(--secondary-foreground));
}

.ui-button[data-variant="secondary"]:hover:not(:disabled) {
  background-color: hsl(var(--secondary) / 0.8);
}

.ui-button[data-variant="ghost"] {
  background-color: transparent;
  color: hsl(var(--foreground));
}
.ui-button[data-variant="ghost"]:hover:not(:disabled) {
  background-color: hsl(var(--accent));
  color: hsl(var(--accent-foreground));
}

.ui-button[data-variant="link"] {
  background-color: transparent;
  color: hsl(var(--primary));
  text-decoration: underline;
  text-underline-offset: 4px;
  height: auto;
  padding: 0;
}
 .ui-button[data-variant="link"]:hover:not(:disabled) {
    color: hsl(var(--primary) / 0.9);
    text-decoration-thickness: max(1px, 0.0625rem);
}

.ui-button[data-size="sm"] {
  height: 2.25rem; /* h-9 */
  padding-left: 0.75rem; /* px-3 */
  padding-right: 0.75rem;
  font-size: 0.75rem; /* text-xs */
}

.ui-button[data-size="lg"] {
  height: 2.75rem; /* h-11 */
  padding-left: 2rem; /* px-8 */
  padding-right: 2rem;
  font-size: 0.875rem;
}

.loading-spinner {
  display: inline-block;
  width: 1rem; /* w-4 */
  height: 1rem; /* h-4 */
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  margin-right: 0.5rem; /* mr-2 */
  animation: spin 0.75s linear infinite;
}

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