/* backend/src/main/resources/static/modules_styles/starter_standard/components/button.css */

/* gabion-export: Starter button system — variants, sizes, icon-only, navigation, groups */

/* ==============================================
   BUTTON COMPONENT — starter-standard

   Flat design, contract variables only.
   ============================================== */

/* ==============================================
   BASE BUTTON
   ============================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gb-spacing-sm);
  padding: var(--gb-spacing-sm) var(--gb-spacing-lg);
  border: 1px solid var(--gb-border-default);
  border-radius: var(--gb-radius-md);
  font-size: var(--gb-type-secondary-size);
  font-weight: var(--gb-font-weight-semibold);
  font-family: var(--gb-font-primary);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--gb-transition-fast);
  white-space: nowrap;
  background: var(--gb-bg-elevated);
  color: var(--gb-text-primary);
}

.btn:hover:not(:disabled) {
  background: var(--gb-accent-subtle);
  border-color: var(--gb-border-strong);
}

.btn:focus-visible {
  outline: 2px solid var(--gb-accent-primary);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==============================================
   VARIANTS
   ============================================== */

.btn-primary {
  background: var(--gb-accent-surface);
  color: var(--gb-text-on-accent);
  border-color: var(--gb-accent-surface);
}

.btn-primary:hover:not(:disabled) {
  background: var(--gb-accent-surface-hover);
  border-color: var(--gb-accent-surface-hover);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--gb-accent-primary);
  color: var(--gb-accent-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gb-accent-subtle);
}

.btn-success {
  background: var(--gb-color-success-surface);
  color: var(--gb-text-on-accent);
  border-color: var(--gb-color-success-surface);
}

.btn-success:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-danger {
  background: var(--gb-color-error-surface);
  color: var(--gb-text-on-accent);
  border-color: var(--gb-color-error-surface);
}

.btn-danger:hover:not(:disabled) {
  opacity: 0.9;
}

/* ==============================================
   SIZES
   ============================================== */

.btn-sm {
  padding: var(--gb-spacing-xs) var(--gb-spacing-md);
  font-size: var(--gb-type-caption-size);
}

.btn-lg {
  padding: var(--gb-spacing-md) var(--gb-spacing-xl);
  font-size: var(--gb-type-body-size);
}

/* ==============================================
   ICONS
   ============================================== */

.btn-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn-sm .btn-icon {
  width: 14px;
  height: 14px;
}

.btn-lg .btn-icon {
  width: 18px;
  height: 18px;
}

.btn-icon-only {
  padding: var(--gb-spacing-sm);
  border-radius: var(--gb-radius-full);
}

.btn-icon-only.btn-sm {
  padding: var(--gb-spacing-xs);
}

.btn-icon-only.btn-lg {
  padding: var(--gb-spacing-md);
}

/* ==============================================
   NAVIGATION BUTTON
   ============================================== */

.nav-btn {
  display: flex;
  align-items: center;
  gap: var(--gb-spacing-sm);
  padding: var(--gb-spacing-sm) var(--gb-spacing-lg);
  background: var(--gb-bg-elevated);
  border: 1px solid var(--gb-border-default);
  border-radius: var(--gb-radius-md);
  text-decoration: none;
  color: var(--gb-text-primary);
  font-weight: var(--gb-font-weight-semibold);
  font-size: var(--gb-type-secondary-size);
  transition: all var(--gb-transition-fast);
}

.nav-btn:hover {
  border-color: var(--gb-accent-primary);
  background: var(--gb-accent-subtle);
}

.nav-btn .btn-icon {
  width: 16px;
  height: 16px;
}

/* ==============================================
   BUTTON GROUPS
   ============================================== */

.btn-group {
  display: flex;
  gap: var(--gb-spacing-sm);
  flex-wrap: wrap;
}

.btn-group--centered {
  justify-content: center;
}

.btn-group--spaced {
  justify-content: space-between;
}

/* ==============================================
   RESPONSIVE
   ============================================== */

@media screen and (max-width: 480px) {
  .btn-group--spaced {
    flex-direction: column;
    gap: var(--gb-spacing-sm);
  }

  .btn-group--spaced .btn {
    width: 100%;
  }
}