/* ==============================================
   COMPONENT: Button
   Description: All button variants — primary, secondary, outline, outline-white; sizes sm, lg, full
   ============================================== */

/* --- Block --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-base);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    opacity var(--transition-fast);
}

.btn:focus-visible {
  outline: 3px solid var(--color-vitality-orange);
  outline-offset: 2px;
}

/* --- Modifiers: Variants --- */

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

.btn--primary:hover {
  background: var(--color-orange-dark);
  border-color: var(--color-orange-dark);
  color: var(--color-clinical-white);
}

.btn--secondary {
  background: var(--color-vitality-orange);
  color: var(--color-clinical-white);
  border-color: var(--color-vitality-orange);
}

.btn--secondary:hover {
  background: var(--color-orange-dark);
  border-color: var(--color-orange-dark);
  color: var(--color-clinical-white);
}

/* Outline on light backgrounds */
.btn--outline {
  background: transparent;
  color: var(--color-innovation-blue);
  border-color: var(--color-innovation-blue);
}

.btn--outline:hover {
  background: var(--color-innovation-blue);
  color: var(--color-clinical-white);
}

/* Outline on dark/blue backgrounds (hero, fusion, ip-banner) */
.btn--outline-white {
  background: transparent;
  color: var(--color-clinical-white);
  border-color: var(--color-clinical-white);
}

.btn--outline-white:hover {
  background: var(--color-clinical-white);
  color: var(--color-innovation-blue);
}

/* --- Modifiers: Sizes --- */

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

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

/* --- Elements --- */

.btn__icon {
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}

/* --- States --- */

.btn.is-loading {
  opacity: 0.7;
  cursor: not-allowed;
  pointer-events: none;
}