/* ==================== BUTTONS ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  padding: 8px 16px;
  min-height: var(--btn-height-base);
  min-width: auto;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
  -webkit-font-smoothing: antialiased;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-ring);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: none;
}

.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline-danger:hover,
.btn-outline-success:hover,
.btn-outline-warning:hover,
.btn-ghost:hover,
.btn-link:hover {
  transform: none;
  box-shadow: none;
}

.btn:disabled,
.btn.disabled {
  background-color: var(--pk-gray-100);
  border-color: var(--pk-gray-200);
  color: var(--pk-gray-400);
  cursor: not-allowed;
  pointer-events: none;
  opacity: 1;
}

/* ---- Primary (Dark Stone) ---- */
.btn-primary,
.btn-secondary {
  background: var(--pk-gray-900);
  color: var(--pk-white);
  border-color: var(--pk-gray-900);
}

.btn-primary:hover,
.btn-secondary:hover {
  background: var(--pk-gray-800);
  border-color: var(--pk-gray-800);
}

/* ---- Orange CTA ----
   Uses --pk-orange-dark (#c8520e) so white text passes WCAG AA (~4.7:1).
   Base --pk-orange (#e5641a) only gives 3.4:1 for normal text. */
.btn-accent {
  background: var(--pk-orange-dark);
  color: var(--pk-white);
  border-color: var(--pk-orange-dark);
}

.btn-accent:hover {
  background: var(--pk-orange-darker);
  border-color: var(--pk-orange-darker);
}

/* ---- Warning ---- */
.btn-warning {
  background: var(--pk-warning);
  color: var(--pk-white);
  border-color: var(--pk-warning);
}

.btn-warning:hover {
  background: var(--pk-warning-700);
  border-color: var(--pk-warning-700);
}

/* ---- Danger ---- */
.btn-danger {
  background: var(--pk-error);
  color: var(--pk-white);
  border-color: var(--pk-error);
}

.btn-danger:hover {
  background: var(--pk-error-700);
  border-color: var(--pk-error-700);
}

/* ---- Success ---- */
.btn-success {
  background: var(--pk-success);
  color: var(--pk-white);
  border-color: var(--pk-success);
}

.btn-success:hover {
  background: var(--pk-success-700);
  border-color: var(--pk-success-700);
}

/* ---- Info ---- */
.btn-info {
  background: var(--pk-info);
  color: var(--pk-white);
  border-color: var(--pk-info);
}

.btn-info:hover {
  background: var(--pk-info-700);
  border-color: var(--pk-info-700);
}

/* ---- Outline Variants ---- */
.btn-outline-primary,
.btn-outline-secondary {
  background: var(--pk-white);
  color: var(--pk-gray-700);
  border-color: var(--pk-gray-300);
}

.btn-outline-primary:hover,
.btn-outline-secondary:hover {
  background: var(--pk-gray-50);
  border-color: var(--pk-gray-400);
  color: var(--pk-gray-900);
}

.btn-outline-danger {
  background: var(--pk-white);
  color: var(--pk-error);
  border-color: var(--pk-error);
}

.btn-outline-danger:hover {
  background: var(--pk-error-light);
}

.btn-outline-success {
  background: var(--pk-white);
  color: var(--pk-success);
  border-color: var(--pk-success);
}

.btn-outline-success:hover {
  background: var(--pk-success-light);
}

/* Outline variant of the prominent full-width .response-btn success action
   (used on the review detail page to differentiate a secondary green CTA, such
   as "Credit received", from the solid-green primary "Approve Document").
   Mirrors .btn-outline-success. The compound selector keeps it ahead of the
   page-local .response-btn base in the cascade. */
.response-btn.response-btn-approve-outline {
  background: var(--pk-white);
  color: var(--pk-success);
  border-color: var(--pk-success);
}

.response-btn.response-btn-approve-outline:hover {
  background: var(--pk-success-light);
  color: var(--pk-success);
  border-color: var(--pk-success);
}

.btn-outline-warning {
  background: var(--pk-white);
  color: var(--pk-warning);
  border-color: var(--pk-warning);
}

.btn-outline-warning:hover {
  background: var(--pk-warning-light);
}

/* ---- Ghost ---- */
.btn-ghost {
  background: transparent;
  color: var(--pk-gray-600);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--pk-gray-100);
  color: var(--pk-gray-800);
}

/* ---- Link ---- */
.btn-link {
  background: transparent;
  color: var(--pk-orange);
  border-color: transparent;
  padding: 0;
  min-height: auto;
  min-width: auto;
  font-weight: var(--font-medium);
}

.btn-link:hover {
  text-decoration: underline;
  color: var(--pk-orange-hover);
}

/* ---- Sizes ---- */
.btn-sm {
  font-size: var(--text-caption);
  padding: 5px 12px;
  min-height: var(--btn-height-sm);
  border-radius: var(--radius-md);
}

.btn-lg {
  font-size: var(--text-base);
  padding: 10px 20px;
  min-height: var(--btn-height-lg);
}

.btn-block {
  width: 100%;
}

/* ---- Icon Button ---- */
.btn-icon {
  width: var(--btn-height-base);
  min-width: var(--btn-height-base);
  padding: 0;
}

.btn-icon.btn-sm {
  width: var(--btn-height-sm);
  min-width: var(--btn-height-sm);
}

/* ---- Button Group ---- */
.btn-group {
  display: flex;
  gap: 4px;
}

/* ---- Loading State ---- */
.btn-loading {
  color: transparent;
  pointer-events: none;
  position: relative;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--pk-white);
  border-radius: 50%;
  animation: btn-spin 0.5s linear infinite;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* Attachment links — outlined chip used for note/email file attachments.
   Lives here (global) so staff + portal pages render it identically. */
.attachment-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--pk-white);
  border: 1px solid var(--pk-gray-200);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--pk-slate-dark);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.attachment-link:hover,
.attachment-link:focus {
  border-color: var(--pk-orange);
  color: var(--pk-orange);
}