/* ==========================================================================
   DownPortal — Canonical UI Primitives (Sharp, Solid & High-Contrast)
   ========================================================================== */

/* Surfaces & Containers */
.surface,
.card,
.panel {
  background: var(--ui-surface);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-card-radius);
}

.card,
.panel {
  padding: var(--ui-space-4);
}

.list-row {
  display: flex;
  align-items: center;
  gap: var(--ui-space-3);
  padding: var(--ui-space-3) var(--ui-space-4);
  background: var(--ui-surface);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-card-radius);
}

/* Layout Utilities */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--ui-space-3);
}

.cluster {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--ui-space-2);
}

/* Form Controls */
.form-control,
.field {
  width: 100%;
  min-height: 38px;
  padding: var(--ui-control-padding);
  color: var(--ui-text-strong);
  background: var(--ui-surface);
  border: 1.5px solid var(--ui-color-border-strong);
  border-radius: var(--ui-control-radius);
  font: inherit;
  font-size: 13.5px;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.12s ease;
}

.form-control:focus,
.field:focus {
  border-color: var(--ui-action);
  outline: 1.5px solid var(--ui-action);
  outline-offset: -1px;
}

.form-control[readonly] {
  background: var(--ui-surface-subtle);
  font-weight: 600;
}

/* Canonical Buttons */
.btn,
.btn-primary,
.btn-secondary,
.btn-subtle,
.btn-danger,
.btn-modal-submit,
.btn-modal-cancel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-base);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--ui-control-radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
  line-height: 1.4;
  white-space: nowrap;
  user-select: none;
}

.btn-primary,
.btn-modal-submit {
  background: var(--ui-action);
  color: var(--ui-on-action);
  border-color: var(--ui-action);
}

.btn-primary:hover,
.btn-modal-submit:hover {
  background: var(--ui-action-hover);
  border-color: var(--ui-action-hover);
  color: var(--ui-on-action);
}

.btn-secondary,
.btn-modal-cancel,
.btn-subtle {
  background: var(--ui-surface);
  color: var(--ui-text-strong);
  border-color: var(--ui-color-border-strong);
}

.btn-secondary:hover,
.btn-modal-cancel:hover,
.btn-subtle:hover {
  background: var(--ui-surface-muted);
  color: var(--ui-text-strong);
  border-color: var(--ui-color-text-strong);
}

.btn-danger {
  background: var(--semantic-danger);
  color: var(--ui-on-action);
  border-color: var(--semantic-danger);
}

.btn-danger:hover {
  background: #b91c1c;
  border-color: #b91c1c;
  color: var(--ui-on-action);
}

.btn-sm {
  min-height: 28px;
  padding: 4px 10px;
  font-size: var(--type-caption-size);
}

.btn-lg {
  padding: 10px 18px;
  font-size: var(--type-body-md-size);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  color: var(--ui-text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--ui-control-radius);
  cursor: pointer;
  transition: color 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.icon-btn:hover {
  color: var(--ui-text-strong);
  background: var(--ui-surface-subtle);
  border-color: var(--ui-border);
}

/* Empty States */
.empty-state {
  padding: var(--ui-space-6);
  color: var(--ui-text-muted);
  text-align: center;
  background: var(--ui-surface-subtle);
  border: 1px dashed var(--ui-border-dashed);
  border-radius: var(--ui-card-radius);
}

.empty-state__title {
  margin: 0 0 var(--ui-space-2);
  color: var(--ui-text-strong);
  font-weight: 700;
}

.empty-state .btn {
  margin-top: var(--ui-space-4);
}