/* ==========================================================================
   Componente: button
   Valores: 06-reference.css §5 / 07-visual-system.md §28–32
   Tipografía base: etiqueta del sistema (JetBrains Mono, label, uppercase)
   según design-source.html §Header/§Hero/§CTA (font-label-md + tracking-wider).
   ========================================================================== */

.fx-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: var(--fx-space-2);
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--fx-radius);
  cursor: pointer;
  font-family: var(--fx-font-mono);
  font-size: var(--fx-text-label);
  font-weight: 500;
  line-height: var(--fx-leading-label);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none !important;
  transition:
    background-color var(--fx-duration-fast) var(--fx-ease-standard),
    border-color var(--fx-duration-fast) var(--fx-ease-standard),
    color var(--fx-duration-fast) var(--fx-ease-standard),
    transform var(--fx-duration-fast) var(--fx-ease-standard);
}

.fx-button:active {
  transform: translateY(1px);
}

/* Primary: Carbon → Cobalt */
.fx-button--primary {
  background: var(--fx-color-carbon);
  color: var(--fx-color-text-inverse);
}

.fx-button--primary:hover {
  background: var(--fx-color-primary);
  color: #fff;
}

.fx-button--primary:active {
  background: var(--fx-color-primary-deep);
}

/* Secondary: outline Carbon → relleno Carbon */
.fx-button--secondary {
  border-color: var(--fx-color-carbon);
  background: transparent;
  color: var(--fx-color-carbon);
}

.fx-button--secondary:hover {
  background: var(--fx-color-carbon);
  color: var(--fx-color-text-inverse);
}

.fx-button--secondary:active {
  background: var(--fx-color-primary-deep);
  border-color: var(--fx-color-primary-deep);
  color: #fff;
}

/* Technical: mono, min-height 36px, superficie elevada, label-sm */
.fx-button--technical {
  min-height: 36px;
  padding: 8px 12px;
  border-color: var(--fx-color-line);
  background: var(--fx-color-surface-raised);
  color: var(--fx-color-carbon);
  font-family: var(--fx-font-mono);
  font-size: var(--fx-text-label-sm);
  font-weight: 500;
  line-height: var(--fx-leading-label-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.fx-button--technical:hover {
  border-color: var(--fx-color-carbon);
  background: var(--fx-color-surface-high);
  color: var(--fx-color-carbon);
}

/* Disabled: contraste estructural, no solo opacidad */
.fx-button[disabled],
.fx-button.is-disabled,
.fx-button[aria-disabled="true"] {
  cursor: not-allowed;
  border-color: var(--fx-color-line);
  background: var(--fx-color-surface-container);
  color: var(--fx-color-outline);
  transform: none;
}

.fx-button:focus-visible {
  outline: 2px solid var(--fx-focus-color);
  outline-offset: var(--fx-focus-offset);
}