/* Button — parity z components/ui/Button.tsx
   Variants: primary | secondary | ghost | outline-light | outline-dark
   Sizes: sm (h-9 px-4 text-xs) | md (h-12 px-6 text-sm) | lg (h-14 px-8 text-sm) */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border-radius: 9999px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast),
              border-color var(--transition-fast), transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

.btn:focus-visible {
  outline: 2px solid var(--color-ball-yellow);
  outline-offset: 2px;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Sizes — match Tailwind h-9/h-12/h-14 */
.btn--sm {
  height: 2.25rem;
  padding-inline: 1rem;
  font-size: 0.75rem;
}

.btn--md,
.btn:not(.btn--sm) {
  height: 3rem;
  padding-inline: 1.5rem;
  font-size: 0.875rem;
}

/* Variants */
.btn--primary {
  background-color: var(--color-ball-yellow);
  color: var(--color-ink);
}
.btn--primary:hover {
  background-color: var(--color-ball-yellow-soft);
}

.btn--secondary {
  background-color: var(--color-court-deep);
  color: var(--color-cream);
}
.btn--secondary:hover {
  background-color: var(--color-court-deep-soft);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-cream);
}
.btn--ghost:hover {
  color: var(--color-ball-yellow);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--color-cream);
  border-color: rgba(241, 236, 219, 0.30);
}
.btn--outline-light:hover {
  border-color: var(--color-ball-yellow);
  color: var(--color-ball-yellow);
}

.btn--danger {
  background-color: transparent;
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.4);
}
.btn--danger:hover {
  background-color: rgba(248, 113, 113, 0.1);
  border-color: #f87171;
  color: #fca5a5;
}

/* Warning (amber) — akcje wymagające uwagi, np. potwierdzenie wpłaty bez
   deklaracji klienta. Celowo inny kolor niż zielony/primary „Potwierdź". */
.btn--warning {
  background-color: transparent;
  color: #f5b041;
  border-color: rgba(245, 176, 65, 0.45);
}
.btn--warning:hover {
  background-color: rgba(245, 176, 65, 0.12);
  border-color: #f5b041;
  color: #f8c471;
}

.btn--outline-dark {
  background-color: transparent;
  color: var(--color-ink);
  border-color: rgba(11, 19, 48, 0.20);
}
.btn--outline-dark:hover {
  border-color: rgba(11, 19, 48, 0.60);
}

/* Lifted shadow modifier — used przez nav CTA, hero CTA, auth submit */
.btn--lifted {
  box-shadow: 0 8px 24px -8px rgba(216, 242, 107, 0.65);
}
.btn--lifted:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px -8px rgba(216, 242, 107, 0.75);
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .btn--lifted:hover {
    transition: none;
    transform: none;
  }
}