.ccl-btn {
  font-family: var(--typography-font-family-default, sans-serif);
  font-size: var(--typography-font-size-default);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--motion-default);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Focus styles for better accessibility */
.ccl-btn:focus-visible {
  outline: 2px solid var(--color-focus-outline, var(--color-primary-default, #0055ff));
  outline-offset: 2px;
}

.ccl-btn:focus:not(:focus-visible) {
  outline: none;
}

/* Sizes */
.ccl-btn--sm {
  font-size: var(--typography-font-size-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
}

.ccl-btn--lg {
  font-size: var(--typography-font-size-lg);
  padding: var(--spacing-md) var(--spacing-lg);
}

/* Variants */
.ccl-btn--primary {
  background-color: var(--color-primary-default);
  color: var(--color-background-default);
  border: 1px solid var(--color-primary-600, #0044cc);
}

.ccl-btn--secondary {
  background-color: var(--color-secondary-default);
  color: var(--color-background-default);
  border: 1px solid var(--color-secondary-600, #e55a00);
}

.ccl-btn--tertiary {
  background-color: transparent;
  color: var(--color-primary-default);
  border: 1px solid var(--color-primary-default);
}

.ccl-btn--destructive {
  background-color: var(--color-error-default);
  color: var(--color-background-default);
  border: 1px solid var(--color-error-600, #b71c1c);
}

/* Outline appearance applied on top of any variant */
.ccl-btn--outline.ccl-btn--primary {
  background-color: transparent;
  color: var(--color-primary-default);
  border-color: var(--color-primary-default);
}

.ccl-btn--outline.ccl-btn--secondary {
  background-color: transparent;
  color: var(--color-secondary-default);
  border-color: var(--color-secondary-default);
}

.ccl-btn--outline.ccl-btn--destructive {
  background-color: transparent;
  color: var(--color-error-default);
  border-color: var(--color-error-default);
}

/* Tertiary behaves like outline by default; keep same primary color */
.ccl-btn--outline.ccl-btn--tertiary,
.ccl-btn--tertiary {
  background-color: transparent;
  color: var(--color-primary-default);
  border-color: var(--color-primary-default);
}

/* Shapes */
.ccl-btn--shape-square { border-radius: 0; }
.ccl-btn--shape-rounded { border-radius: var(--radius-md); }
.ccl-btn--shape-pill { border-radius: 9999px; }

/* States */
.ccl-btn:hover:not([disabled]) {
  filter: brightness(0.9);
}

.ccl-btn:active:not([disabled]) {
  filter: brightness(0.8);
}

.ccl-btn[disabled] {
  background-color: var(--color-surface-default, #ccc);
  color: var(--color-text-disabled, #9ca3af);
  cursor: not-allowed;
  opacity: 0.7;
  border: 1px solid var(--color-border-disabled, #ced4da) !important;
}

/* Loading */
.ccl-btn--loading {
  pointer-events: none;
}

.spinner {
  border: 2px solid var(--color-background-default);
  border-top: 2px solid var(--color-primary-default);
  border-radius: 50%;
  width: 1em;
  height: 1em;
  margin-right: var(--spacing-sm);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}