/* NEXUS Design System v2 — components (ship these classes) */

*, *::before, *::after { box-sizing: border-box; }

html {
  font-family: var(--nx-font-body);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background-color: var(--nx-surface-page);
  color: var(--nx-text-primary);
  line-height: 1.6;
}

/* —— Typography —— */
.nx-display {
  font-family: var(--nx-font-display);
  font-size: var(--nx-text-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--nx-text-primary);
}
.nx-h1 {
  font-family: var(--nx-font-display);
  font-size: var(--nx-text-h1);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 var(--nx-space-4);
}
.nx-h2 {
  font-family: var(--nx-font-display);
  font-size: var(--nx-text-h2);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 0 0 var(--nx-space-3);
}
.nx-h3 {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-caption);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--nx-matrix);
  margin: 0 0 var(--nx-space-3);
}
.nx-body {
  font-size: var(--nx-text-body);
  line-height: 1.65;
  color: var(--nx-text-secondary);
  max-width: 48ch;
}
.nx-body--primary { color: var(--nx-text-primary); }
.nx-caption {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-caption);
  letter-spacing: 0.06em;
  color: var(--nx-text-secondary);
}
.nx-stamp {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nx-text-muted);
}
.nx-eyebrow {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nx-phosphor-hi);
}
.nx-eyebrow .nx-rec { color: var(--nx-infrared); }
.nx-pull {
  font-family: var(--nx-font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  font-weight: 600;
  line-height: 1.25;
  max-width: 22ch;
  color: var(--nx-text-primary);
}
.nx-accent { color: var(--nx-infrared); font-style: normal; }
.nx-accent-ice { color: var(--nx-accent-cool); }
.nx-accent-phosphor { color: var(--nx-phosphor-hi); }

/* —— Tags / categories (filled chips only) —— */
.nx-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nx-space-2);
  align-items: center;
}
.nx-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1;
  padding: 0.38rem 0.6rem;
  border: 1px solid transparent;
  white-space: nowrap;
}
.nx-tag--sm {
  font-size: 0.52rem;
  letter-spacing: 0.1em;
  padding: 0.28rem 0.45rem;
}
.nx-tag--draft {
  background: var(--nx-tag-draft-bg);
  color: var(--nx-tag-draft-text);
  border-color: var(--nx-tag-draft-border);
}
.nx-tag--premier {
  background: var(--nx-tag-premier-bg);
  color: var(--nx-tag-premier-text);
  border-color: var(--nx-tag-premier-bg);
}
.nx-tag--signal {
  background: var(--nx-tag-signal-bg);
  color: var(--nx-tag-signal-text);
  border-color: var(--nx-tag-signal-bg);
}
a.nx-tag {
  text-decoration: none;
  transition: filter var(--nx-duration), border-color var(--nx-duration);
}
a.nx-tag:hover { filter: brightness(1.08); }
a.nx-tag:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: 2px;
}

/* Inline draft label — token + class names in tables */
.nx-code-draft,
.nx-table tbody td:first-child > code,
.nx-table tbody td:nth-child(3) > code {
  display: inline-block;
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-caption);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.45;
  padding: 0.3rem 0.55rem;
  background: var(--nx-tag-draft-bg);
  color: var(--nx-tag-draft-text);
  border: 1px solid var(--nx-tag-draft-border);
  vertical-align: baseline;
}

/* Logo lockup (v2 canonical) */
.nx-logo {
  font-family: var(--nx-font-display);
  font-weight: 800;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--nx-smoke);
  display: inline-flex;
  align-items: center;
  gap: 0;
  line-height: 1;
}
.nx-logo--sm { font-size: 0.75rem; }
.nx-logo--md { font-size: 1.25rem; }
.nx-logo--lg { font-size: clamp(2rem, 6vw, 3.5rem); }
.nx-logo-x {
  display: inline-block;
  width: 0.42em;
  height: 0.42em;
  position: relative;
  margin: 0 0.06em;
  flex-shrink: 0;
}
.nx-logo-x::before,
.nx-logo-x::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transform-origin: center;
}
.nx-logo-x::before { transform: translate(-50%, -50%) rotate(45deg); }
.nx-logo-x::after { transform: translate(-50%, -50%) rotate(-45deg); }
.nx-logo-x--accent::before,
.nx-logo-x--accent::after { background: var(--nx-infrared); }

/* PNG lockup — theme-aware vanilla (dark void) / ink (light void) */
.nx-logo-mark {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  text-decoration: none;
}
.nx-logo-mark__img {
  display: block;
  width: auto;
  height: 1.35rem;
}
.nx-logo-mark--md .nx-logo-mark__img { height: 1.65rem; }
.nx-logo-mark--lg .nx-logo-mark__img { height: clamp(2.5rem, 10vw, 4.5rem); }
.nx-logo-mark__img--ink { display: none; }
[data-theme="light"] .nx-logo-mark__img--vanilla { display: none; }
[data-theme="light"] .nx-logo-mark__img--ink { display: block; }
.nx-logo-mark--ink-only .nx-logo-mark__img--vanilla { display: none; }
.nx-logo-mark--ink-only .nx-logo-mark__img--ink { display: block; }
.nx-logo-mark--vanilla-only .nx-logo-mark__img--ink { display: none; }
.nx-logo-mark--vanilla-only .nx-logo-mark__img--vanilla { display: block; }
.nx-logo-mark--signal-only .nx-logo-mark__img--vanilla,
.nx-logo-mark--signal-only .nx-logo-mark__img--ink { display: none; }
.nx-logo-mark--signal-only .nx-logo-mark__img--signal { display: block; }
.nx-logo-mark__img--signal { display: none; }

/* —— Links — bright blue + underline (same hex both themes) —— */
.nx-link,
[data-theme="light"] .nx-link,
[data-theme="light"] .nx-panel .nx-link,
[data-theme="light"] .nx-guide-footer .nx-link {
  color: var(--nx-link);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color var(--nx-duration) var(--nx-ease);
}
.nx-link:hover,
[data-theme="light"] .nx-link:hover {
  color: var(--nx-link-hover);
}
.nx-link:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: 3px;
}

/* —— Buttons (base) —— */
.nx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--nx-space-2);
  min-height: var(--nx-touch);
  padding: 0.75rem 1.35rem;
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-caption);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--nx-border-strong);
  background: transparent;
  color: var(--nx-text-primary);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    border-color var(--nx-duration) var(--nx-ease),
    color var(--nx-duration) var(--nx-ease),
    background var(--nx-duration) var(--nx-ease),
    transform var(--nx-duration) var(--nx-ease),
    box-shadow var(--nx-duration);
}
.nx-btn:active:not(:disabled) {
  transform: scale(0.985);
  filter: brightness(0.94);
}
.nx-btn:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: 3px;
}
.nx-btn:disabled,
.nx-btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* Primary — signal (infrared fill · same hex on dark + warm ground) */
.nx-btn--primary {
  border-color: var(--nx-signal);
  color: var(--nx-signal-text);
  background: var(--nx-signal);
}
.nx-btn--primary:hover:not(:disabled) {
  border-color: #ff6a2e;
  background: #ff6a2e;
  color: var(--nx-signal-text);
}

/* Secondary — slate border + dust fill (not green — green reads as success) */
.nx-btn--secondary {
  border-color: var(--nx-secondary-border);
  color: var(--nx-secondary-text);
  background: var(--nx-secondary-bg);
}
.nx-btn--secondary:hover:not(:disabled) {
  border-color: var(--nx-dust-hi);
  color: var(--nx-secondary-text-hover);
  background: var(--nx-secondary);
}


/* Sizes */
.nx-btn--sm {
  min-height: 36px;
  padding: 0.5rem 1rem;
  font-size: var(--nx-text-stamp);
}
.nx-btn--lg {
  min-height: 52px;
  padding: 1rem 1.85rem;
  font-size: 0.72rem;
}

/* Loading state on button */
.nx-btn.is-loading {
  color: transparent;
  pointer-events: none;
}
.nx-btn.is-loading::after {
  content: "";
  position: absolute;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--nx-border-strong);
  border-top-color: var(--nx-signal);
  border-radius: 50%;
  animation: nx-spin 0.7s linear infinite;
}

/* —— Cards —— */
.nx-card {
  background: var(--nx-surface-raised);
  border: 1px solid var(--nx-border);
  padding: var(--nx-space-5);
}
.nx-card--interactive {
  transition: border-color var(--nx-duration), transform var(--nx-duration) var(--nx-ease);
  cursor: pointer;
}
.nx-card--interactive:hover {
  border-color: rgba(255, 76, 0, 0.25);
  transform: translateY(-2px);
}
/* —— Spec rows (decks) —— */
.nx-spec { display: grid; gap: 2px; margin: 0; }
.nx-spec-row {
  display: grid;
  grid-template-columns: 6.25rem 1fr;
  gap: var(--nx-space-4);
  padding: 0.8rem 1rem;
  background: var(--nx-surface-raised);
  border: 1px solid var(--nx-border);
  align-items: start;
}
.nx-spec-label {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  letter-spacing: 0.1em;
  color: var(--nx-infrared);
  margin: 0;
}
.nx-spec-value {
  font-size: var(--nx-text-small);
  line-height: 1.55;
  color: var(--nx-text-secondary);
  margin: 0;
}

/* —— Forms —— */
.nx-field { margin-bottom: var(--nx-space-4); }
.nx-label {
  display: block;
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nx-text-secondary);
  margin-bottom: var(--nx-space-2);
}
.nx-input,
.nx-textarea {
  width: 100%;
  min-height: var(--nx-touch);
  padding: 0.75rem 1rem;
  font-family: var(--nx-font-body);
  font-size: var(--nx-text-body);
  color: var(--nx-text-primary);
  background: var(--nx-surface-raised);
  border: 1px solid var(--nx-border);
  transition: border-color var(--nx-duration), box-shadow var(--nx-duration);
}
.nx-textarea { min-height: 120px; resize: vertical; }
.nx-input:hover,
.nx-textarea:hover { border-color: var(--nx-border-strong); }
.nx-input:focus,
.nx-textarea:focus {
  outline: none;
  border-color: rgba(255, 76, 0, 0.45);
  box-shadow: 0 0 0 2px rgba(255, 76, 0, 0.2);
}
.nx-input:focus-visible,
.nx-textarea:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: 2px;
}
.nx-input,
.nx-textarea {
  position: relative;
}
.nx-field {
  position: relative;
}
.nx-input::placeholder { color: var(--nx-text-muted); }
.nx-hint {
  font-size: var(--nx-text-small);
  color: var(--nx-text-muted);
  margin-top: var(--nx-space-2);
}
.nx-field--error .nx-input,
.nx-field--error .nx-textarea,
.nx-field--error .nx-select {
  border-color: rgba(255, 76, 0, 0.55);
}
.nx-field--error .nx-input:focus,
.nx-field--error .nx-textarea:focus,
.nx-field--error .nx-select:focus {
  border-color: rgba(255, 76, 0, 0.65);
  box-shadow: 0 0 0 2px rgba(255, 76, 0, 0.22);
}
.nx-field--success .nx-input,
.nx-field--success .nx-textarea,
.nx-field--success .nx-select {
  border-color: rgba(0, 229, 160, 0.45);
}
.nx-field--success .nx-input:focus,
.nx-field--success .nx-textarea:focus,
.nx-field--success .nx-select:focus {
  border-color: rgba(0, 229, 160, 0.55);
  box-shadow: 0 0 0 2px rgba(0, 229, 160, 0.18);
}
.nx-error,
.nx-success {
  display: flex;
  align-items: flex-start;
  gap: var(--nx-space-2);
  font-size: var(--nx-text-small);
  margin-top: var(--nx-space-2);
}
.nx-error { color: var(--nx-error); }
.nx-success { color: var(--nx-success); }
.nx-error .nx-icon,
.nx-success .nx-icon {
  width: 1rem;
  height: 1rem;
  margin-top: 0.1rem;
  flex-shrink: 0;
}
.nx-select {
  width: 100%;
  min-height: var(--nx-touch);
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  font-family: var(--nx-font-body);
  font-size: var(--nx-text-body);
  color: var(--nx-text-primary);
  background: var(--nx-surface-raised);
  border: 1px solid var(--nx-border);
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--nx-mist) 50%),
    linear-gradient(135deg, var(--nx-mist) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% + 2px),
    calc(100% - 12px) calc(50% + 2px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  transition: border-color var(--nx-duration), box-shadow var(--nx-duration);
}
.nx-select:hover { border-color: var(--nx-border-strong); }
.nx-select:focus {
  outline: none;
  border-color: rgba(255, 76, 0, 0.45);
  box-shadow: 0 0 0 2px rgba(255, 76, 0, 0.2);
}
.nx-select:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: 2px;
}
.nx-check,
.nx-radio {
  display: flex;
  align-items: flex-start;
  gap: var(--nx-space-3);
  min-height: var(--nx-touch);
  cursor: pointer;
}
.nx-check input,
.nx-radio input {
  width: 1.125rem;
  height: 1.125rem;
  margin: 0.2rem 0 0;
  accent-color: var(--nx-signal);
  flex-shrink: 0;
}
.nx-check span,
.nx-radio span {
  font-size: var(--nx-text-body);
  color: var(--nx-text-primary);
  line-height: 1.45;
}
.nx-check small,
.nx-radio small {
  display: block;
  font-size: var(--nx-text-small);
  color: var(--nx-text-muted);
  margin-top: 0.15rem;
}
.nx-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nx-space-3);
  margin-top: var(--nx-space-5);
}

/* —— Search —— */
.nx-search {
  position: relative;
  max-width: 28rem;
}
.nx-search .nx-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--nx-icon-color);
  pointer-events: none;
}
.nx-search .nx-input {
  padding-left: 2.75rem;
  padding-right: 2.75rem;
}
.nx-search__clear {
  position: absolute;
  right: 0.35rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--nx-touch);
  height: var(--nx-touch);
  padding: 0;
  border: none;
  background: none;
  color: var(--nx-text-muted);
  cursor: pointer;
  transition: color var(--nx-duration);
}
.nx-search__clear:hover { color: var(--nx-text-primary); }
.nx-search__clear:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: -2px;
}
.nx-search-results {
  margin-top: var(--nx-space-3);
  border: 1px solid var(--nx-border);
  background: var(--nx-surface-raised);
}
.nx-search-results:empty { display: none; }
.nx-search-results li {
  list-style: none;
  border-bottom: 1px solid var(--nx-border);
}
.nx-search-results li:last-child { border-bottom: none; }
.nx-search-results a,
.nx-search-results button {
  display: block;
  width: 100%;
  min-height: var(--nx-touch);
  padding: 0.75rem 1rem;
  text-align: left;
  font-family: var(--nx-font-body);
  font-size: var(--nx-text-body);
  color: var(--nx-text-primary);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--nx-duration);
}
.nx-search-results a:hover,
.nx-search-results button:hover {
  background: var(--nx-surface-hover);
}
.nx-search-results a:focus-visible,
.nx-search-results button:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: -2px;
}
.nx-search-results .nx-caption {
  display: block;
  margin-top: 0.15rem;
  color: var(--nx-text-muted);
}

/* —— Empty state —— */
.nx-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--nx-space-3);
  padding: var(--nx-space-8) var(--nx-space-4);
  border: 1px solid var(--nx-border);
  background: var(--nx-surface-raised);
  width: 100%;
  max-width: 28rem;
  margin-inline: auto;
  box-sizing: border-box;
}
.nx-empty__icon {
  width: 3rem;
  height: 3rem;
  color: var(--nx-icon-color);
  opacity: 0.85;
}
.nx-empty__title {
  font-family: var(--nx-font-display);
  font-size: var(--nx-text-h3);
  font-weight: 600;
  color: var(--nx-text-primary);
  margin: 0;
}
.nx-empty__body {
  font-size: var(--nx-text-body);
  color: var(--nx-text-secondary);
  margin: 0;
  max-width: 32ch;
}
.nx-empty__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nx-space-3);
  justify-content: center;
  margin-top: var(--nx-space-2);
}

/* —— Toast —— */
.nx-toast-region {
  position: fixed;
  bottom: calc(var(--nx-bar-h) + var(--nx-space-4));
  right: var(--nx-pad);
  z-index: 600;
  display: flex;
  flex-direction: column;
  gap: var(--nx-space-2);
  width: min(360px, calc(100vw - var(--nx-pad) * 2));
  pointer-events: none;
}
@media (max-width: 899px) {
  .nx-toast-region {
    bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px) + var(--nx-space-3));
    left: var(--nx-pad);
    right: var(--nx-pad);
    width: auto;
  }
}
@keyframes nx-toast-in {
  from { opacity: 0; transform: translateY(0.5rem); }
  to { opacity: 1; transform: translateY(0); }
}
.nx-toast {
  display: flex;
  align-items: flex-start;
  gap: var(--nx-space-3);
  padding: var(--nx-space-3) var(--nx-space-4);
  background: var(--nx-surface-overlay);
  border: 1px solid var(--nx-border-strong);
  backdrop-filter: blur(12px);
  pointer-events: auto;
  animation: nx-toast-in var(--nx-duration) var(--nx-ease);
}
.nx-toast.is-leaving {
  opacity: 0;
  transform: translateY(0.35rem);
  transition: opacity var(--nx-duration-fast), transform var(--nx-duration-fast);
}
.nx-toast--signal { border-left: 3px solid var(--nx-signal); }
.nx-toast--ice { border-left: 3px solid var(--nx-ice); }
.nx-toast--phosphor { border-left: 3px solid var(--nx-phosphor-hi); }
.nx-toast__icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.nx-toast--signal .nx-toast__icon { color: var(--nx-signal); }
.nx-toast--ice .nx-toast__icon { color: var(--nx-ice); }
.nx-toast--phosphor .nx-toast__icon { color: var(--nx-phosphor-hi); }
.nx-toast__body { flex: 1; min-width: 0; }
.nx-toast__title {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--nx-text-primary);
  margin: 0 0 var(--nx-space-1);
}
.nx-toast__text {
  font-size: var(--nx-text-small);
  color: var(--nx-text-secondary);
  margin: 0;
  line-height: 1.45;
}
.nx-toast__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: none;
  background: none;
  color: var(--nx-text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: color var(--nx-duration);
}
.nx-toast__close:hover { color: var(--nx-text-primary); }
.nx-toast__close:focus-visible {
  outline: 2px solid var(--nx-focus);
  outline-offset: 2px;
}

/* —— Icons —— */
.nx-icon {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: square;
  stroke-linejoin: miter;
  vertical-align: middle;
  color: var(--nx-icon-color);
}
.nx-icon--sm { width: 1rem; height: 1rem; }
.nx-icon--md { width: 1.5rem; height: 1.5rem; }
.nx-icon--lg { width: 2rem; height: 2rem; }
.nx-icon--vanilla { color: var(--nx-vanilla); }
.nx-icon--ice { color: var(--nx-ice); }
.nx-icon--signal { color: var(--nx-signal); }
.nx-icon--phosphor { color: var(--nx-phosphor-hi); }
.nx-icon--muted { color: var(--nx-text-muted); }
.nx-icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr));
  gap: var(--nx-space-2);
}
.nx-icon-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--nx-space-2);
  padding: var(--nx-space-4) var(--nx-space-2);
  border: 1px solid var(--nx-border);
  background: var(--nx-surface-raised);
  text-align: center;
}
.nx-icon-cell .nx-caption {
  font-size: 0.55rem;
  word-break: break-all;
}

/* —— Navigation —— */
.nx-bar {
  position: sticky;
  top: 0;
  z-index: var(--nx-z-bar);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nx-bar-h);
  padding: 0 var(--nx-pad);
  background: var(--nx-surface-bar);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nx-border);
}
.nx-bar .nx-link {
  font-family: var(--nx-font-mono);
  font-size: var(--nx-text-stamp);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nx-chapter-nav {
  display: none;
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 400;
  flex-direction: column;
  gap: 4px;
  padding: var(--nx-space-4) var(--nx-space-3);
  min-width: 7.5rem;
}
@media (min-width: 1100px) {
  .nx-chapter-nav { display: flex; }
}
.nx-chapter-nav a {
  display: flex;
  align-items: center;
  gap: var(--nx-space-3);
  padding: 0.5rem 0.75rem;
  font-family: var(--nx-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--nx-text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--nx-duration), border-color var(--nx-duration);
}
.nx-chapter-nav a:hover {
  color: var(--nx-text-primary);
}
.nx-chapter-nav a.is-active {
  color: var(--nx-text-primary);
  border-left-color: var(--nx-infrared);
}
.nx-chapter-num {
  color: var(--nx-infrared);
  font-size: 0.62rem;
  min-width: 1.25rem;
}

.nx-mobile-nav {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--nx-z-bar);
  padding: var(--nx-space-2) var(--nx-pad);
  padding-bottom: calc(var(--nx-space-2) + env(safe-area-inset-bottom, 0px));
  background: var(--nx-surface-overlay);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--nx-border);
  gap: var(--nx-space-2);
  overflow-x: auto;
}
@media (min-width: 900px) { .nx-mobile-nav { display: none; } }
.nx-mobile-nav a {
  flex: 1;
  min-width: 4.5rem;
  text-align: center;
  padding: var(--nx-space-2);
  font-family: var(--nx-font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--nx-text-muted);
  text-decoration: none;
}
.nx-mobile-nav a.is-active {
  color: var(--nx-text-primary);
  background: rgba(255, 76, 0, 0.08);
}

/* —— Loading —— */
@keyframes nx-spin {
  to { transform: rotate(360deg); }
}
@keyframes nx-pulse-ir {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}
.nx-loader-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--nx-space-4);
  min-height: 200px;
  padding: var(--nx-space-8);
}
.nx-loader-count {
  font-family: var(--nx-font-mono);
  font-size: 2.5rem;
  letter-spacing: 0.2em;
  color: var(--nx-text-muted);
}
.nx-loader-bar {
  width: min(240px, 80%);
  height: 2px;
  background: var(--nx-border);
  overflow: hidden;
}
.nx-loader-bar span {
  display: block;
  height: 100%;
  width: 35%;
  background: linear-gradient(90deg, var(--nx-phosphor-hi), var(--nx-infrared));
  animation: nx-loader-slide 1.4s var(--nx-ease) infinite;
}
@keyframes nx-loader-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(320%); }
}
.nx-skeleton {
  background: linear-gradient(
    90deg,
    var(--nx-surface-raised) 0%,
    rgba(168, 216, 255, 0.06) 50%,
    var(--nx-surface-raised) 100%
  );
  background-size: 200% 100%;
  animation: nx-shimmer 1.6s ease-in-out infinite;
  border-radius: var(--nx-radius);
}
@keyframes nx-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.nx-skeleton--line { height: 0.75rem; margin-bottom: var(--nx-space-2); }
.nx-skeleton--line:last-child { width: 70%; }
.nx-skeleton--card { height: 160px; }

.nx-spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--nx-border);
  border-top-color: var(--nx-signal);
  border-radius: 50%;
  animation: nx-spin 0.7s linear infinite;
}
.nx-rec-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--nx-infrared);
  animation: nx-pulse-ir 1.8s ease-in-out infinite;
  margin-right: 0.35em;
  vertical-align: middle;
}

/* —— Social story frame —— */
.nx-story {
  width: 100%;
  max-width: 270px;
  aspect-ratio: 9 / 16;
  background: var(--nx-void);
  border: 1px solid var(--nx-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.nx-story__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--nx-space-3);
  font-family: var(--nx-font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--nx-border);
}
.nx-story__media {
  flex: 1;
  position: relative;
  background: var(--nx-ground);
}
.nx-story__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.nx-story__body {
  padding: var(--nx-space-3);
}
.nx-story__line {
  font-family: var(--nx-font-display);
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0 0 var(--nx-space-1);
}

/* —— Deck preview chrome —— */
.nx-deck-frame {
  border: 1px solid var(--nx-border);
  background: var(--nx-void);
  overflow: hidden;
}
.nx-deck-frame__hero {
  aspect-ratio: 21 / 9;
  position: relative;
}
.nx-deck-frame__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.nx-deck-frame__body { padding: var(--nx-space-4); }
.nx-deck-sticky {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--nx-space-2);
  padding: var(--nx-space-3) var(--nx-pad);
  background: var(--nx-surface-overlay);
  border-top: 1px solid var(--nx-border-accent);
}

/* —— App shell preview —— */
.nx-app-shell {
  border: 1px solid var(--nx-border);
  background: var(--nx-surface-raised);
  max-width: 390px;
  min-height: 520px;
  display: flex;
  flex-direction: column;
}
.nx-app-shell__bar {
  padding: var(--nx-space-4);
  border-bottom: 1px solid var(--nx-border);
}
.nx-app-shell__content {
  flex: 1;
  padding: var(--nx-space-4);
}
.nx-app-tab {
  display: flex;
  border-top: 1px solid var(--nx-border);
}
.nx-app-tab button {
  flex: 1;
  min-height: var(--nx-touch);
  border: none;
  background: none;
  font-family: var(--nx-font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--nx-text-muted);
  cursor: pointer;
}
.nx-app-tab button.is-active {
  color: var(--nx-matrix);
  border-top: 2px solid var(--nx-matrix);
  margin-top: -1px;
}

/* —— Swatches —— */
.nx-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 3px;
}
.nx-swatch {
  min-height: 72px;
  padding: var(--nx-space-3);
  font-family: var(--nx-font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--nx-border);
}
.nx-swatch small { opacity: 0.75; font-size: 0.48rem; }

/* —— Demo row —— */
.nx-demo-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nx-space-3);
  align-items: center;
  margin: var(--nx-space-4) 0;
  max-width: 100%;
  min-width: 0;
}
.nx-demo-row--stack {
  flex-direction: column;
  align-items: stretch;
}
.nx-demo-row--stack .nx-btn {
  width: 100%;
}
.nx-state-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--nx-space-3);
}
.nx-state-cell {
  padding: var(--nx-space-4);
  background: var(--nx-surface-raised);
  border: 1px solid var(--nx-border);
  text-align: center;
}
.nx-state-cell .nx-caption { display: block; margin-top: var(--nx-space-3); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .nx-btn,
  .nx-card--interactive,
  .nx-loader-bar span,
  .nx-skeleton,
  .nx-spinner,
  .nx-rec-dot { animation: none; transition: none; }
  .nx-ir-frame__box,
  .nx-ir-frame__reticle,
  .nx-toast { transition: none; animation: none; }
}