/* Button Component Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.5rem 1rem;
  font-weight: var(--font-weight-semibold);
  text-align: center;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: inherit;
}

/* Variants */
.btn[data-variant="primary"] {
  background-color: var(--color-primary);
  color: var(--text-primary);
}

.btn[data-variant="primary"]:hover {
  background-color: var(--color-primary-dark);
}

.btn[data-variant="secondary"] {
  background-color: var(--color-neutral-600);
  color: var(--text-inverse);
}

.btn[data-variant="secondary"]:hover {
  background-color: var(--color-neutral-700);
}

.btn[data-variant="outline"] {
  background-color: transparent;
  border: var(--border-width) solid var(--color-primary);
  color: var(--text-primary);
}

.btn[data-variant="outline"]:hover {
  background-color: var(--color-primary-50);
}

/* Sizes */
.btn[data-size="sm"] {
  padding: 0.375rem 0.75rem;
  font-size: var(--font-size-sm);
}

.btn[data-size="md"] {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-base);
}

.btn[data-size="lg"] {
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-lg);
}

/* States */
.btn:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn[data-loading="true"] {
  position: relative;
  color: transparent;
}

.btn[data-loading="true"]::after {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

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