/* ==========================================================
   Inklusion Studio: Button-System
   Kapitel 4 – Sprint 4F

   Varianten:
   - .button--primary   wichtigste Aktion
   - .button--secondary alternative Aktion
   - .button--text      dezenter Aktionslink
   - .button--icon      quadratische Icon-Schaltfläche

   Grundsatz: keine abgerundeten Ecken.
   ========================================================== */

:root {
  --button-bg-primary: var(--color-primary, var(--color-green, #36752e));
  --button-bg-primary-hover: color-mix(in srgb, var(--button-bg-primary) 84%, #000);
  --button-color-primary: #fff;
  --button-color-secondary: var(--color-text, #071a4a);
  --button-border-secondary: currentColor;
  --button-focus: var(--color-yellow, #f4cf00);
  --button-danger: #b42318;
  --button-danger-hover: #8f1c13;
  --button-transition: 180ms ease;
}

.button,
a.button {
  display: inline-flex;
  min-block-size: 2.75rem;
  max-inline-size: 100%;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  box-sizing: border-box;
  padding: 0.7rem 1.1rem;
  border: 2px solid transparent;
  border-radius: 0;
  font: inherit;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--button-transition),
    border-color var(--button-transition),
    color var(--button-transition),
    text-decoration-color var(--button-transition);
}

.button:hover {
  text-decoration: none;
}

.button:focus-visible {
  outline: 3px solid var(--button-focus);
  outline-offset: 3px;
}

.button:disabled,
.button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.48;
}

.button--primary,
a.button--primary {
  border-color: var(--button-bg-primary);
  background: var(--button-bg-primary);
  color: var(--button-color-primary);
}

.button--primary:hover:not(:disabled):not([aria-disabled="true"]),
.button--primary:focus-visible {
  border-color: var(--button-bg-primary-hover);
  background: var(--button-bg-primary-hover);
  color: var(--button-color-primary);
}

.button--secondary,
a.button--secondary {
  border-color: var(--button-border-secondary);
  background: #fff;
  color: var(--button-color-secondary);
}

.button--secondary:hover:not(:disabled):not([aria-disabled="true"]),
.button--secondary:focus-visible {
  border-color: var(--button-bg-primary);
  background: var(--button-bg-primary);
  color: #fff;
}

.button--danger,
a.button--danger {
  border-color: var(--button-danger);
  background: #fff;
  color: var(--button-danger);
}

.button--danger:hover:not(:disabled):not([aria-disabled="true"]),
.button--danger:focus-visible {
  border-color: var(--button-danger-hover);
  background: var(--button-danger-hover);
  color: #fff;
}

.button--text,
a.button--text {
  min-block-size: 2.75rem;
  padding-inline: 0;
  border: 0;
  background: transparent;
  color: var(--button-color-secondary);
  text-decoration: underline;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.2em;
}

.button--text:hover,
.button--text:focus-visible {
  background: transparent;
  color: var(--button-bg-primary);
  text-decoration-thickness: 0.16em;
}

.button--icon,
a.button--icon {
  inline-size: 2.75rem;
  min-inline-size: 2.75rem;
  block-size: 2.75rem;
  min-block-size: 2.75rem;
  padding: 0;
}

.button--large,
a.button--large {
  min-block-size: 3.25rem;
  padding: 0.9rem 1.35rem;
  font-size: 1.0625rem;
}

.button--small,
a.button--small {
  min-block-size: 2.5rem;
  padding: 0.55rem 0.85rem;
  font-size: 0.9375rem;
}

@media (prefers-reduced-motion: reduce) {
  .button {
    transition: none;
  }
}