/* Buttons */
.nf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--nf-space-xs);
  padding: var(--nf-space-sm) var(--nf-space-md);
  font-size: var(--nf-text-sm);
  font-weight: 500;
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-md);
  background: var(--nf-bg-elevated);
  color: var(--nf-text);
  cursor: pointer;
  transition: background var(--nf-transition), border-color var(--nf-transition);
  white-space: nowrap;
}

.nf-btn:hover:not(:disabled) {
  background: var(--nf-bg-hover);
}

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

.nf-btn--primary {
  background: var(--nf-accent);
  color: var(--nf-text-inverse);
  border-color: var(--nf-accent);
}

.nf-btn--primary:hover:not(:disabled) {
  background: var(--nf-accent-hover);
}

.nf-btn--secondary {
  background: transparent;
  border-color: var(--nf-border-light);
}

.nf-btn--danger {
  background: transparent;
  border-color: var(--nf-danger);
  color: var(--nf-danger);
}

.nf-btn--sm {
  padding: var(--nf-space-xs) var(--nf-space-sm);
  font-size: var(--nf-text-xs);
}

.nf-btn--lg {
  padding: var(--nf-space-md) var(--nf-space-xl);
  font-size: var(--nf-text-lg);
}

/* Inputs */
.nf-input {
  padding: var(--nf-space-sm) var(--nf-space-md);
  font-size: var(--nf-text-sm);
  background: var(--nf-bg-elevated);
  color: var(--nf-text);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-md);
  outline: none;
  transition: border-color var(--nf-transition);
}

.nf-input:focus {
  border-color: var(--nf-accent);
}

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

.nf-input--search {
  width: 200px;
}

/* Textarea */
.nf-textarea {
  padding: var(--nf-space-sm) var(--nf-space-md);
  font-size: var(--nf-text-sm);
  background: var(--nf-bg-elevated);
  color: var(--nf-text);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-md);
  outline: none;
  resize: vertical;
  min-height: 80px;
  font-family: var(--nf-font);
}

.nf-textarea:focus {
  border-color: var(--nf-accent);
}

/* Select */
.nf-select {
  padding: var(--nf-space-sm) var(--nf-space-md);
  font-size: var(--nf-text-sm);
  background: var(--nf-bg-elevated);
  color: var(--nf-text);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-md);
  outline: none;
  cursor: pointer;
}

.nf-select:focus {
  border-color: var(--nf-accent);
}

/* Labels */
.nf-label {
  display: block;
  font-size: var(--nf-text-xs);
  font-weight: 600;
  color: var(--nf-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--nf-space-xs);
}

/* Form group */
.nf-form-group {
  margin-bottom: var(--nf-space-md);
}

.nf-form-group .nf-input,
.nf-form-group .nf-textarea,
.nf-form-group .nf-select {
  width: 100%;
}

/* Cards */
.nf-card {
  background: var(--nf-bg-surface);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-md);
  padding: var(--nf-space-md);
}

.nf-card__title {
  font-size: var(--nf-text-lg);
  font-weight: 600;
  margin-bottom: var(--nf-space-sm);
}

.nf-card__meta {
  font-size: var(--nf-text-xs);
  color: var(--nf-text-muted);
}

/* Tags */
.nf-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: var(--nf-text-xs);
  background: var(--nf-accent-muted);
  color: var(--nf-accent);
  border-radius: var(--nf-radius-full);
  font-weight: 500;
}

.nf-tag--remove {
  cursor: pointer;
  opacity: 0.7;
}

.nf-tag--remove:hover {
  opacity: 1;
}

/* Badges */
.nf-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--nf-text-xs);
  font-weight: 600;
  border-radius: var(--nf-radius-full);
}

.nf-badge--success {
  background: rgba(45, 134, 89, 0.12);
  color: var(--nf-success);
}

.nf-badge--warning {
  background: rgba(212, 146, 10, 0.12);
  color: var(--nf-warning);
}

.nf-badge--danger {
  background: rgba(217, 58, 46, 0.10);
  color: var(--nf-danger);
}

.nf-badge--info {
  background: rgba(58, 122, 191, 0.12);
  color: var(--nf-info);
}

/* Toast */
.nf-toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--nf-space-sm);
  padding: var(--nf-space-sm) var(--nf-space-md);
  background: var(--nf-sidebar-bg);
  color: var(--nf-text-inverse);
  border: none;
  border-radius: var(--nf-radius-md);
  box-shadow: var(--nf-shadow-lg);
  font-size: var(--nf-text-sm);
  animation: nf-toast-in 200ms ease;
  min-width: 250px;
  max-width: 400px;
}

.nf-toast--success { border-left: 3px solid #34d399; }
.nf-toast--warning { border-left: 3px solid #fbbf24; }
.nf-toast--error   { border-left: 3px solid #f87171; }
.nf-toast--info    { border-left: 3px solid #60a5fa; }

.nf-toast__close {
  margin-left: auto;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  font-size: var(--nf-text-lg);
  line-height: 1;
}

.nf-toast__close:hover {
  color: #FFFFFF;
}

@keyframes nf-toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Modal */
.nf-modal {
  background: var(--nf-bg-surface);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-lg);
  box-shadow: var(--nf-shadow-lg);
  min-width: 400px;
  max-width: 600px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.nf-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--nf-space-md) var(--nf-space-lg);
  border-bottom: 1px solid var(--nf-border);
}

.nf-modal__title {
  font-size: var(--nf-text-lg);
  font-weight: 600;
}

.nf-modal__close {
  background: none;
  border: none;
  color: var(--nf-text-muted);
  cursor: pointer;
  font-size: var(--nf-text-xl);
  line-height: 1;
}

.nf-modal__body {
  padding: var(--nf-space-lg);
  overflow-y: auto;
  flex: 1;
}

.nf-modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--nf-space-sm);
  padding: var(--nf-space-md) var(--nf-space-lg);
  border-top: 1px solid var(--nf-border);
}

/* Empty state */
.nf-empty {
  text-align: center;
  padding: var(--nf-space-2xl);
  color: var(--nf-text-muted);
}

.nf-empty__title {
  font-size: var(--nf-text-lg);
  margin-bottom: var(--nf-space-sm);
}

/* Section headers */
.nf-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--nf-space-md);
}

.nf-section-header__title {
  font-size: var(--nf-text-xl);
  font-weight: 600;
}

/* Loading spinner */
.nf-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--nf-border);
  border-top-color: var(--nf-accent);
  border-radius: 50%;
  animation: nf-spin 600ms linear infinite;
}

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

/* ── Help section ── */

.nf-help {
  max-width: 800px;
  margin: 0 auto;
}

.nf-help__header {
  margin-bottom: var(--nf-space-xl);
}

.nf-help__title {
  font-size: var(--nf-text-2xl);
  font-weight: 700;
  color: var(--nf-text);
  margin-bottom: var(--nf-space-xs);
}

.nf-help__subtitle {
  font-size: var(--nf-text-base);
  color: var(--nf-text-muted);
}

/* Collapsible sections */
.nf-help-section {
  background: var(--nf-bg-elevated);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-lg);
  margin-bottom: var(--nf-space-sm);
  box-shadow: var(--nf-shadow-sm);
  overflow: hidden;
}

.nf-help-section__header {
  display: flex;
  align-items: center;
  gap: var(--nf-space-sm);
  padding: var(--nf-space-md) var(--nf-space-lg);
  cursor: pointer;
  user-select: none;
  transition: background var(--nf-transition);
}

.nf-help-section__header:hover {
  background: var(--nf-bg-hover);
}

.nf-help-section__icon {
  font-size: var(--nf-text-lg);
  width: 20px;
  text-align: center;
  color: var(--nf-accent);
}

.nf-help-section__title {
  font-size: var(--nf-text-base);
  font-weight: 600;
  color: var(--nf-text);
  flex: 1;
}

.nf-help-section__chevron {
  font-size: var(--nf-text-sm);
  color: var(--nf-text-muted);
  transition: transform 200ms ease;
}

.nf-help-section--open .nf-help-section__chevron {
  transform: rotate(90deg);
}

.nf-help-section__body {
  display: none;
  padding: 0 var(--nf-space-lg) var(--nf-space-lg);
  border-top: 1px solid var(--nf-border);
}

.nf-help-section--open .nf-help-section__body {
  display: block;
}

/* Content typography */
.nf-help__h3 {
  font-size: var(--nf-text-base);
  font-weight: 700;
  color: var(--nf-text);
  margin-top: var(--nf-space-lg);
  margin-bottom: var(--nf-space-sm);
}

.nf-help__h3:first-child {
  margin-top: var(--nf-space-md);
}

.nf-help__p {
  font-size: var(--nf-text-sm);
  color: var(--nf-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--nf-space-sm);
}

/* Step lists */
.nf-help-steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: var(--nf-space-sm) 0;
}

.nf-help-steps__item {
  position: relative;
  padding-left: 32px;
  margin-bottom: var(--nf-space-sm);
  font-size: var(--nf-text-sm);
  color: var(--nf-text-secondary);
  line-height: 1.6;
  counter-increment: step;
}

.nf-help-steps__item::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  background: var(--nf-accent-muted);
  color: var(--nf-accent);
  font-size: 11px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Bullet lists */
.nf-help-bullets {
  padding-left: var(--nf-space-lg);
  margin: var(--nf-space-sm) 0;
}

.nf-help-bullets li {
  font-size: var(--nf-text-sm);
  color: var(--nf-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--nf-space-xs);
}

.nf-help-bullets li::marker {
  color: var(--nf-accent);
}

/* Tip callout */
.nf-help-tip {
  background: var(--nf-accent-muted);
  border-left: 3px solid var(--nf-accent);
  padding: var(--nf-space-sm) var(--nf-space-md);
  border-radius: 0 var(--nf-radius-md) var(--nf-radius-md) 0;
  font-size: var(--nf-text-sm);
  color: var(--nf-text-secondary);
  line-height: 1.6;
  margin-top: var(--nf-space-md);
}

.nf-help-tip strong {
  color: var(--nf-accent);
}

/* Nav reference inline badge */
.nf-help-nav-ref {
  display: inline-block;
  padding: 0 6px;
  background: var(--nf-bg-surface);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-sm);
  font-size: var(--nf-text-xs);
  font-weight: 600;
  color: var(--nf-accent);
}

/* Keyboard shortcut badge */
.nf-help-kbd {
  display: inline-block;
  padding: 1px 6px;
  background: var(--nf-bg-surface);
  border: 1px solid var(--nf-border-light);
  border-radius: var(--nf-radius-sm);
  font-family: var(--nf-font-mono);
  font-size: var(--nf-text-xs);
  color: var(--nf-text);
  box-shadow: 0 1px 0 var(--nf-border-light);
}

/* Inline code */
.nf-help__p code,
.nf-help-steps__item code,
.nf-help-bullets code {
  background: var(--nf-bg-surface);
  padding: 1px 5px;
  border-radius: var(--nf-radius-sm);
  font-family: var(--nf-font-mono);
  font-size: 0.85em;
  color: var(--nf-text);
}

/* Hierarchy diagram */
.nf-help-hierarchy {
  margin: var(--nf-space-md) 0;
}

.nf-help-hierarchy__item {
  padding: var(--nf-space-sm) var(--nf-space-md);
  border-left: 3px solid var(--nf-border);
  font-size: var(--nf-text-sm);
  color: var(--nf-text-secondary);
  margin-bottom: 2px;
}

.nf-help-hierarchy__item--1 { margin-left: 0; border-left-color: var(--nf-accent); }
.nf-help-hierarchy__item--2 { margin-left: 20px; border-left-color: #3A7ABF; }
.nf-help-hierarchy__item--3 { margin-left: 40px; border-left-color: #2D8659; }
.nf-help-hierarchy__item--4 { margin-left: 60px; border-left-color: #D4920A; }
.nf-help-hierarchy__item--5 { margin-left: 80px; border-left-color: #7B5EA7; }

/* Pipeline stage list */
.nf-help-pipeline-stages {
  margin: var(--nf-space-sm) 0;
}

.nf-help-pipeline-stage {
  display: flex;
  align-items: center;
  gap: var(--nf-space-sm);
  padding: var(--nf-space-xs) 0;
  font-size: var(--nf-text-sm);
  color: var(--nf-text-secondary);
}

.nf-help-pipeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Quick reference table */
.nf-help-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--nf-space-md) 0;
  font-size: var(--nf-text-sm);
}

.nf-help-table th {
  text-align: left;
  padding: var(--nf-space-sm) var(--nf-space-md);
  background: var(--nf-bg-surface);
  border: 1px solid var(--nf-border);
  font-size: var(--nf-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--nf-text-muted);
}

.nf-help-table td {
  padding: var(--nf-space-sm) var(--nf-space-md);
  border: 1px solid var(--nf-border);
  color: var(--nf-text-secondary);
  line-height: 1.5;
}