/* ═══════════════════════════════════════════════════════════════
   IA Helper — Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ── Design tokens ─────────────────────────────────────────── */
:root {
  --c-bg:            #F4F6F9;
  --c-surface:       #FFFFFF;
  --c-border:        #DDE3EC;
  --c-border-strong: #B8C4D4;
  --c-text:          #1C2333;
  --c-text-muted:    #3B4D6A;
  --c-accent:        #0050A0;
  --c-accent-light:  #EAF2FF;
  --c-accent-dark:   #003D7A;
  --c-amber:         #F59E0B;
  --c-amber-light:   #FFFBEB;
  --c-danger:        #991B1B;
  --c-danger-light:  #FEF2F2;
  --c-green:         #16A34A;
  --c-nested-bg:     #F0F7FF;

  --shadow-xs: 0 1px 2px rgba(28,35,51,.06);
  --shadow-sm: 0 2px 6px rgba(28,35,51,.08), 0 1px 2px rgba(28,35,51,.05);
  --shadow-md: 0 4px 16px rgba(28,35,51,.10), 0 2px 4px rgba(28,35,51,.06);
  --shadow-lift: 0 8px 24px rgba(28,35,51,.16);

  --r-sm:  4px;
  --r-md:  8px;
  --r-lg: 12px;
  --r-xl: 16px;

  --t-fast:   120ms ease;
  --t-normal: 200ms ease;
  --t-slow:   280ms ease;

  --eb-width: 288px;
  --header-h: 52px;
  --preview-h: 196px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; }
textarea, input { font-family: inherit; font-size: inherit; }
kbd {
  display: inline-block;
  padding: 1px 5px;
  font-size: .75em;
  font-family: ui-monospace, monospace;
  background: var(--c-bg);
  border: 1px solid var(--c-border-strong);
  border-radius: 3px;
  box-shadow: 0 1px 0 var(--c-border-strong);
  white-space: nowrap;
}
dialog { border: none; border-radius: var(--r-lg); padding: 0; box-shadow: var(--shadow-md); }
dialog::backdrop { background: rgba(28,35,51,.45); }
/* Ensure the HTML `hidden` attribute is never overridden by CSS display rules */
[hidden] { display: none !important; }

/* ── Skip link ──────────────────────────────────────────────── */
.skip-link {
  position: absolute; left: -9999px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; left: 12px; top: 12px;
  width: auto; height: auto; overflow: visible;
  padding: 8px 16px; border-radius: var(--r-sm);
  background: var(--c-text); color: var(--c-surface);
  font-size: .9rem; font-weight: 600;
  z-index: 9999; text-decoration: none;
  box-shadow: var(--shadow-md);
}

/* ── Utilities ──────────────────────────────────────────────── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.hint-text { font-size: .75rem; color: var(--c-text-muted); margin-top: 4px; line-height: 1.5; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 12px; border-radius: var(--r-sm);
  font-size: .85rem; font-weight: 500; line-height: 1;
  min-height: 44px;
  transition: background var(--t-fast), color var(--t-fast), opacity var(--t-fast), box-shadow var(--t-fast);
  color: var(--c-text);
  border: 1px solid transparent;
}
.btn:hover:not(:disabled) { background: var(--c-bg); color: var(--c-text); }
.btn:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn--primary {
  background: var(--c-accent); color: #fff; border-color: var(--c-accent-dark);
}
.btn--primary:hover:not(:disabled) { background: var(--c-accent-dark); color: #fff; }
.btn--ghost { border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-text); }
.btn--ghost:hover:not(:disabled) { border-color: var(--c-border-strong); color: var(--c-text); }
.btn--danger { background: var(--c-danger); color: #fff; border-color: #B91C1C; }
.btn--danger-ghost { border-color: var(--c-danger); color: var(--c-danger); }
.btn--danger-ghost:hover:not(:disabled) { background: var(--c-danger-light); color: var(--c-danger); }
.btn--danger:hover:not(:disabled) { background: #7F1D1D; color: #fff; }
.btn--sm { padding: 4px 9px; font-size: .8rem; min-width: 44px; justify-content: center; }
.btn--full { width: 100%; justify-content: center; }
.btn--icon span { font-size: 1em; }

/* ── Lucide SVG icons ───────────────────────────────────────── */
.lucide {
  width: 16px; height: 16px;
  flex-shrink: 0;
  stroke-width: 2;
  vertical-align: middle;
  pointer-events: none;
}
/* Slightly smaller in compact card action buttons */
.am-action-btn .lucide,
.card-delete-btn .lucide,
.tree-toggle .lucide { width: 14px; height: 14px; }
/* Drag handles use the same small size */
.drag-handle .lucide { width: 14px; height: 14px; }

/* ── App layout ─────────────────────────────────────────────── */
#app {
  display: grid;
  grid-template-rows: var(--header-h) var(--preview-h) 1fr;
  grid-template-areas: "header" "preview" "workspace";
  height: 100vh;
  /* overflow visible lets preview dropdowns overlay the workspace */
}

/* ── Header ─────────────────────────────────────────────────── */
#app-header {
  grid-area: header;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-xs);
  z-index: 20;
}
.header-brand { display: flex; align-items: center; gap: 10px; }
.app-logo { width: 28px; height: 28px; flex-shrink: 0; border-radius: 6px; }
.app-name {
  font-size: 1.1rem; font-weight: 700; letter-spacing: -.3px;
  color: var(--c-accent);
}
.app-tagline { font-size: .78rem; color: var(--c-text-muted); }
.header-actions { display: flex; align-items: center; gap: 6px; }

/* ── Menu Preview ───────────────────────────────────────────── */
#preview-section {
  grid-area: preview;
  display: flex; flex-direction: column;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: relative;
  z-index: 10; /* sit above workspace so dropdowns overlay it */
  overflow: visible;
}
.preview-bar {
  display: flex; flex-direction: row; align-items: center; gap: 6px;
  padding: 6px 16px;
  flex-shrink: 0;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
}
.preview-bar__sep {
  width: 1px; height: 22px;
  background: var(--c-border-strong);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ── Site name input ────────────────────────────────────────── */
.preview-sitename { display: flex; align-items: center; }
.preview-sitename__input {
  height: 24px;
  padding: 0 8px;
  font-size: .8rem;
  border: 1px solid var(--c-border);
  border-radius: 4px;
  background: var(--c-surface);
  color: var(--c-text);
  width: 140px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.preview-sitename__input:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 2px rgba(0,80,160,.18);
}
.preview-sitename__input::placeholder { color: var(--c-text-muted); }

/* ── Theme switcher buttons ─────────────────────────────────── */
.theme-switcher { display: flex; align-items: center; gap: 3px; }
.preview-control-label {
  font-size: .75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .06em; color: var(--c-text-muted);
  margin-right: 2px; white-space: nowrap;
}
.theme-btn {
  padding: 2px 8px; font-size: .74rem; font-weight: 500;
  min-height: 44px;
  border-radius: 4px; border: 1px solid var(--c-border);
  background: var(--c-surface); color: var(--c-text-muted);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.theme-btn:hover { background: var(--c-bg); color: var(--c-text); }
.theme-btn.active, .theme-btn[aria-pressed="true"] {
  background: var(--c-accent); color: #fff; border-color: var(--c-accent-dark);
}
.theme-btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }

/* ── Preview option toggles (Utility bar / Mega menu) ───────── */
.preview-opts { display: flex; align-items: center; gap: 3px; }
.preview-opt-btn {
  padding: 2px 8px; font-size: .74rem; font-weight: 500;
  min-height: 44px;
  border-radius: 4px; border: 1px dashed var(--c-border);
  background: var(--c-surface); color: var(--c-text-muted);
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.preview-opt-btn:hover:not(:disabled) { background: var(--c-bg); color: var(--c-text); }
.preview-opt-btn.active, .preview-opt-btn[aria-pressed="true"] {
  background: var(--c-accent-light); color: var(--c-accent);
  border-color: var(--c-accent); border-style: solid;
}
.preview-opt-btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.preview-opt-btn:disabled { opacity: .35; cursor: default; }


#preview-frame {
  flex: 1; overflow: visible;
  padding: 0 16px 8px;
  display: flex; align-items: flex-start;
}
/* Themed frames go edge-to-edge so the nav looks realistic */
#preview-frame.themed {
  padding: 0;
  align-items: stretch;
}
#preview-frame.themed #preview-content {
  overflow: visible;
}
#preview-content {
  flex: 1;
  overflow: visible; /* must not clip absolutely-positioned dropdowns */
  transition: opacity var(--t-normal);
}
.preview-empty { font-size: .82rem; color: var(--c-text-muted); margin-top: 8px; font-style: italic; }

/* ── Text logo placeholder for themed previews ──────────────── */
.site-logo-text {
  font-weight: 700; font-size: .95rem;
  color: var(--nav-primary-link, #222);
  letter-spacing: -.2px;
}

/* ══════════════════════════════════════════════════════════════════
   MEGA MENU — UCLA-inspired three-tier header
   Row 1: utility bar (white)
   Row 2: mega-brand-row (white, logo only)
   Row 3: mega-nav-row (dark, full-width equal-width nav items)
   Panel: absolutely positioned below .mega-nav-row, same width
   ══════════════════════════════════════════════════════════════════ */

/* ── Utility bar: white background for mega ────────────────────── */
.site-header--mega .utility-bar {
  background-color: #ffffff !important;
  border-bottom: 1px solid #e0e0e0 !important;
}

/* ── Brand row ─────────────────────────────────────────────────── */
.mega-brand-row {
  background: #ffffff;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid #e0e0e0;
  display: flex;
  align-items: center;
}
.mega-brand-row .site-logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: #003b75;
  letter-spacing: -0.01em;
}

/* ── Nav row: dark bar, full-width background, constrained content ── */
.mega-nav-row {
  background: var(--nav-mega-nav-bg, #003b75);
  position: relative;
  overflow: visible;   /* allow panel to escape below */
  z-index: 100;
}
/* Inner wrapper constrains nav items to a readable max-width,
   preventing text from running to the edges on wide monitors. */
.mega-nav-row__inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
}

/* Nav fills the full inner wrapper width.
   Must use #preview-frame.themed prefix (id specificity = 1) to beat
   the global desktop-override rules in the "Force desktop layout" block. */
#preview-frame.themed .site-header--mega .primary-nav {
  width: 100% !important;
}
#preview-frame.themed .site-header--mega .primary-nav__list {
  width: 100% !important;
  height: 52px !important;
}
#preview-frame.themed .site-header--mega .primary-nav__item {
  flex: 1 !important;
}
/* Link fills its item and centres text */
#preview-frame.themed .site-header--mega .primary-nav__link {
  width: 100% !important;
  justify-content: center !important;
  padding: 0 0.5rem !important;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: .06em;
  font-size: 0.8125rem !important;
  color: rgba(255, 255, 255, 0.92) !important;
  background: none !important;
}
#preview-frame.themed .site-header--mega .primary-nav__link:hover,
#preview-frame.themed .site-header--mega .primary-nav__link:focus-visible {
  color: #fff !important;
  background-color: rgba(255, 255, 255, .08) !important;
}
/* Yellow underline on hover — overrides the theme's blue */
#preview-frame.themed .site-header--mega .primary-nav__link::after {
  background-color: var(--nav-mega-accent, #f0b429) !important;
  height: 3px;
}

/* ── Mega panel ────────────────────────────────────────────────── */
/* Positioning: absolute sibling of <nav> inside .mega-nav-row.
   left:0/right:0 anchors it to the exact width of .mega-nav-row,
   which is the same full width as the nav items above it.         */
.preview-mega-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--nav-mega-bg, #1a3a5c);
  border-top: 4px solid var(--nav-mega-accent, #f0b429);
  box-shadow: 0 8px 32px rgba(0, 0, 0, .3);
  z-index: 250;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s ease, visibility 0s linear .2s;
}
/* Reveal on nav hover or panel self-hover */
#preview-frame.themed .site-header--mega:has(.primary-nav--has-mega:hover) .preview-mega-panel,
#preview-frame.themed .preview-mega-panel:hover {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

/* Panel inner: same max-width and centering as .mega-nav-row__inner
   so columns align with nav items above them. */
.mega-panel__inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  gap: 0;
  padding: 1.75rem 0 2.25rem;
}

/* Each column: flex:1 — matches the equal-width nav items above */
.mega-col {
  flex: 1;
  padding: 0 1.5rem;
  border-left: 1px solid rgba(255, 255, 255, .14);
  overflow: hidden;   /* prevent any child from bleeding into adjacent column */
}
.mega-col:first-child { border-left: none; }

/* Column header hidden — the nav item above IS the label */
.mega-col__head { display: none; }

.mega-col__list { list-style: none; padding: 0; margin: 0; }

/* L2 links — matches UCLA: 16px / 600 / 1.2 line-height / .01em tracking
   NO negative margin — that was causing the hover rect to bleed into the
   adjacent column. Padding alone creates the inset click target.         */
.site-header--mega .mega-col__link {
  display: block;
  padding: 1rem .6rem;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1.2;
  color: rgba(255, 255, 255, .88) !important;
  transition: background-color .12s ease, color .12s ease;
  text-decoration: none;
}
.site-header--mega .mega-col__link:hover {
  color: #fff !important;
  background-color: rgba(255, 255, 255, .14) !important;
  text-decoration: underline;
}
.mega-col__sub-arrow { font-size: .8em; opacity: .65; }

/* ── Column dimming / active highlight (JS-driven) ─────────────── */
.mega-panel--has-active .mega-col {
  opacity: 0.42;
  transition: opacity .15s ease;
}
.mega-col--active {
  opacity: 1 !important;
  transition: opacity .15s ease;
}

/* ── Force desktop layout in themed preview ─────────────────────
   Theme CSS uses viewport-width media queries. We always want the
   desktop nav layout in #preview-frame (mobile view uses our own
   separate mobile builder and never loads theme CSS).
   ─────────────────────────────────────────────────────────────── */
#preview-frame.themed .primary-nav {
  display: flex !important;
  position: static !important;
  flex-direction: row !important;
  box-shadow: none !important;
  max-height: none !important;
  overflow: visible !important;
  border-top: none !important;
}
#preview-frame.themed .nav-toggle     { display: none !important; }
#preview-frame.themed .utility-bar    { display: block !important; }
#preview-frame.themed .utility-strip  { display: block !important; }
#preview-frame.themed .primary-nav__list {
  flex-direction: row !important;
  align-items: stretch !important;
  height: var(--nav-primary-height, 56px) !important;
  width: auto !important;
}
#preview-frame.themed .primary-nav__item {
  flex-direction: row !important;
  border-bottom: none !important;
}
#preview-frame.themed .primary-nav__link {
  justify-content: flex-start !important;
  height: auto !important;
  font-size: var(--nav-primary-font-size, .9375rem) !important;
  padding: 0 1rem !important;
}
#preview-frame.themed .primary-nav__link::after { display: block !important; }
/* Restore dropdown positioning (mobile turns it static/accordion) */
#preview-frame.themed .dropdown-menu {
  position: absolute !important;
  opacity: 0 !important;
  visibility: hidden !important;
  transform: translateY(-4px) !important;
  border-left: none !important;
  margin-left: 0 !important;
  display: block !important;
  /* Fast exit: no linger so previous dropdown vanishes immediately on hover-out */
  transition: opacity .1s ease, transform .1s ease, visibility 0s linear .1s !important;
}
/* Only :hover, only DIRECT child dropdown (> combinator prevents nested
   .dropdown-menu--sub elements from all showing simultaneously) */
#preview-frame.themed .primary-nav__item--has-dropdown:hover > .dropdown-menu {
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(0) !important;
  transition-delay: 0s !important;
}
/* Raise the currently-hovered item so its dropdown is always on top */
#preview-frame.themed .primary-nav__item--has-dropdown:hover {
  z-index: 301 !important;
}

/* ── Two-tier theme: slim utility bar above the Default nav ─── */
.preview-util-bar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 1.25rem;
  height: 36px;
  padding: 0 16px;
  background: #f0f0f0;
  border: 1px solid #ddd;
  border-radius: var(--r-sm) var(--r-sm) 0 0;
  margin-bottom: -1px; /* merge border with pnav-wrapper border */
}
.preview-util-link {
  font-size: .9rem;
  color: #444;
  white-space: nowrap;
  cursor: default;
  transition: color .1s;
}
.preview-util-link:hover { color: #111; text-decoration: underline; }
/* Adjust pnav-wrapper top corners when utility bar is present */
.preview-util-bar + .pnav-wrapper {
  border-radius: 0 0 var(--r-md) var(--r-md);
}

/* ── Themed dropdown: cascading flyout for nested items ─────────── */
.dropdown-menu__link--has-sub {
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
}
.dropdown-sub-arrow { font-size: .9em; margin-left: .375rem; opacity: .7; flex-shrink: 0; }

/* Sub-menu panel that flies out to the right */
#preview-frame.themed .dropdown-menu__item--has-sub { position: relative !important; }
#preview-frame.themed .dropdown-menu--sub {
  position: absolute !important;
  top: -1px !important;
  left: 100% !important;
  opacity: 0 !important;
  visibility: hidden !important;
  transform: translateX(-4px) !important;
  transition: opacity .1s ease, transform .1s ease, visibility 0s linear .1s !important;
}
#preview-frame.themed .dropdown-menu__item--has-sub:hover > .dropdown-menu--sub {
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateX(0) !important;
  transition-delay: 0s !important;
  z-index: 302 !important;
}
/* Smart flip: sub-menu opens LEFT when right edge would overflow the preview frame */
#preview-frame.themed .dropdown-menu--sub.flip-left {
  left: auto !important;
  right: 100% !important;
  transform: translateX(4px) !important;
}
#preview-frame.themed .dropdown-menu__item--has-sub:hover > .dropdown-menu--sub.flip-left {
  transform: translateX(0) !important;
}

/* ── Theme 2 panel: section groups + sub-links ──────────────── */
.nav-panel__item--group { list-style: none; margin-bottom: .25rem; }
.nav-panel__group-head {
  display: block;
  padding: .45rem .375rem .3rem;
  font-size: .82rem;
  font-weight: 700;
  color: var(--nav-panel-link-hover, var(--c-accent));
  border-bottom: 2px solid currentColor;
  margin-bottom: .1rem;
  border-top: 1px solid rgba(0,0,0,.07);
  margin-top: .35rem;
  pointer-events: none;
}
.nav-panel__item--group:first-child .nav-panel__group-head {
  border-top: none;
  margin-top: 0;
}
.nav-panel__sub { list-style: none; padding: 0; }
.nav-panel__link--sub {
  padding-left: .875rem !important;
  font-size: .84rem !important;
}

/* ── Theme 3 Bold: grouped dropdown (section groups within panel) ── */
.dropdown-menu--grouped { min-width: 220px; }
.dropdown-menu__item--group { padding: 0; border-bottom: none; }
.dropdown-menu__group-head {
  display: block;
  padding: .5rem 1rem .25rem;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--nav-dropdown-link-hover-indicator, var(--nav-primary-link-active-indicator, var(--c-accent)));
  border-bottom: 1px solid rgba(0,0,0,.08);
  margin-bottom: .1rem;
  pointer-events: none;
  border-top: 1px solid rgba(0,0,0,.06);
  margin-top: .2rem;
}
.dropdown-menu__item--group:first-child .dropdown-menu__group-head {
  border-top: none;
  margin-top: 0;
}
.dropdown-menu__group-list { list-style: none; padding: 0; }
.dropdown-menu__link--sub {
  padding-left: 1.5rem !important;
  font-size: .84rem !important;
  opacity: .9;
}

/* ── Make Theme 2 panels visible on hover in preview ────────── */
#preview-content .primary-nav__item--has-panel:hover .nav-panel {
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(0) !important;
  transition-delay: 0s !important;
}

/* ── Desktop / Laptop nav preview — looks like a real site header ── */

/* Outer wrapper: full-width bar with brand + nav */
.pnav-wrapper {
  display: flex; align-items: stretch;
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: var(--r-md);
  box-shadow: 0 2px 8px rgba(28,35,51,.08);
  overflow: visible;
  width: 100%;
  height: 58px;
}


.pnav-brand {
  display: flex; align-items: center;
  padding: 0 16px;
  font-size: .9rem; font-weight: 700; color: #1C2333;
  border-right: 1px solid #E2E8F0;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Top-level <ul> */
.preview-nav {
  display: flex; align-items: stretch;
  list-style: none;
  padding: 0 4px;
  overflow: visible;
  flex: 1;
}

/* Every nav item */
.preview-nav > li {
  position: relative;
  display: flex; align-items: stretch;
}

/* Top-level link labels */
.preview-nav > li > .pnav-item {
  display: flex; align-items: center;
  padding: 0 16px;
  font-size: 1rem; font-weight: 600; color: #374151;
  white-space: nowrap; gap: 5px; cursor: default;
  border-bottom: 3px solid transparent;
  transition: color .12s, border-color .12s;
}


.preview-nav > li:hover > .pnav-item {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

/* ── Dropdowns ─────────────────────────────────────────── */

/* All sub-menus */
.pnav-sub {
  display: none;
  position: absolute;
  list-style: none;
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(28,35,51,.13), 0 2px 6px rgba(28,35,51,.07);
  padding: 5px 0;
  min-width: 180px;
  z-index: 200;
}

/* Level-1 dropdown: opens below top nav item */
.preview-nav > li > .pnav-sub {
  top: calc(100% + 2px);
  left: 0;
}

/* Level-2+ dropdowns: fly out to the right */
.pnav-sub .pnav-sub {
  top: -6px;
  left: 100%;
}

/* Every li inside a dropdown needs position:relative so its own sub can anchor to it */
.pnav-sub li {
  position: relative;
}

/* Dropdown link labels */
.pnav-sub .pnav-item {
  display: flex; align-items: center;
  padding: 10px 18px;
  font-size: .95rem; font-weight: 400; color: #374151;
  white-space: nowrap; gap: 5px; cursor: default;
  transition: background .1s, color .1s;
}

.pnav-sub li:hover > .pnav-item {
  background: #EBF4FF; color: var(--c-accent);
}

/* Show on hover / focus */
.preview-nav > li:hover > .pnav-sub,
.preview-nav > li:focus-within > .pnav-sub,
.pnav-sub li:hover > .pnav-sub,
.pnav-sub li:focus-within > .pnav-sub { display: block; }

/* Chevron icons */
.pnav-chevron { font-size: .8em; color: var(--c-text-muted); }

/* ── Utility nav (desktop/laptop) — right-aligned secondary links ── */
.preview-utility-nav {
  display: flex; align-items: stretch;
  list-style: none; padding: 0 4px;
  margin-left: auto;
  border-left: 1px solid #E2E8F0;
  overflow: visible;
}
.preview-utility-nav > li {
  position: relative; display: flex; align-items: stretch;
}
.preview-utility-nav > li > .pnav-item {
  display: flex; align-items: center; padding: 0 12px;
  font-size: .95rem; font-weight: 500; color: #4F5E7B;
  white-space: nowrap; gap: 4px; cursor: default;
  border-bottom: 3px solid transparent;
  transition: color .12s, border-color .12s;
}
.preview-utility-nav > li:hover > .pnav-item {
  color: var(--c-accent); border-bottom-color: var(--c-accent);
}
/* Utility dropdowns use same pnav-sub styles */
.preview-utility-nav > li > .pnav-sub {
  top: calc(100% + 2px); right: 0; left: auto;
}

/* ── Mobile utility divider ──────────────────────────────── */
.pmob-utility-divider {
  height: 1px; background: #E2E8F0; margin: 4px 12px;
}
.pmob-utility-nav .pmob-item {
  font-size: .8rem; color: #4F5E7B;
}

/* ── Mobile nav preview ─────────────────────────────────── */

#preview-frame[data-vp="mobile"] { align-items: flex-start; }
#preview-frame[data-vp="mobile"] #preview-content { display: flex; align-items: flex-start; }

/* Phone frame — overflow visible so panel overlays rather than pushes */
.preview-mobile-chrome {
  position: relative;
  border: 1px solid #D1D9E6; border-radius: var(--r-lg);
  overflow: visible;
  width: 220px; min-width: 220px;
  box-shadow: 0 4px 16px rgba(28,35,51,.10);
  background: #fff;
}
.preview-mobile-chrome.menu-open {
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  border-bottom-color: transparent;
}
.preview-mobile-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px 8px 14px;
  background: #fff;
}
.pmob-brand { font-size: .9rem; font-weight: 700; color: #1C2333; }

/* Hamburger — interactive, icon swaps to X when open */
.preview-hamburger {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  color: #4B5563; cursor: pointer;
  background: none; border: none; border-radius: var(--r-sm); padding: 0;
  transition: background var(--t-fast), color var(--t-fast);
}
.preview-hamburger:hover { background: var(--c-accent-light); color: var(--c-accent); }

/* Panel: hidden by default, overlays when open */
.preview-mobile-panel {
  display: none;
  position: absolute;
  top: 100%; left: -1px; right: -1px;
  background: #FAFBFD;
  border: 1px solid #D1D9E6; border-top: none;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  box-shadow: 0 8px 24px rgba(28,35,51,.15);
  max-height: 340px; overflow-y: auto;
  z-index: 20; padding: 6px 0;
}
.preview-mobile-chrome.menu-open .preview-mobile-panel {
  display: block;
  animation: pmob-panel-in var(--t-fast) ease both;
}
@keyframes pmob-panel-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Accordion section button (L1 items with children) */
.pmob-section-btn {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 9px 12px 9px 16px;
  font-size: .9rem; font-weight: 600; color: #374151;
  background: none; border: none; cursor: pointer; text-align: left;
  transition: background var(--t-fast), color var(--t-fast);
}
.pmob-section-btn:hover { background: var(--c-accent-light); color: var(--c-accent); }
.pmob-chevron {
  flex-shrink: 0; width: 14px; height: 14px;
  transition: transform var(--t-normal);
}
.pmob-section-btn[aria-expanded="true"] .pmob-chevron { transform: rotate(90deg); }

.pmob-nav { list-style: none; }
.pmob-nav li { list-style: none; }

/* L1 leaf items */
.pmob-item {
  display: block; padding: 9px 16px;
  font-size: .9rem; font-weight: 500; color: #374151;
  cursor: default;
}
/* L2+ child items */
.pmob-item--child {
  font-weight: 400; color: #4F5E7B; font-size: .875rem;
  border-left: 2px solid #E2E8F0;
}
.pmob-sub { list-style: none; }
.pmob-nav li:hover > .pmob-item { background: var(--c-accent-light); color: var(--c-accent); }

/* ── Workspace ──────────────────────────────────────────────── */
#workspace {
  grid-area: workspace;
  display: grid;
  grid-template-columns: var(--eb-width) 1fr;
  grid-template-areas: "eb am";
  overflow: hidden;
  transition: grid-template-columns var(--t-slow);
}
#workspace.eb-collapsed {
  grid-template-columns: 40px 1fr;
}

/* ── Element Box ────────────────────────────────────────────── */
#element-box {
  grid-area: eb;
  display: flex; flex-direction: column;
  background: var(--c-surface);
  border-right: 1px solid var(--c-border);
  overflow: hidden;
  transition: opacity var(--t-slow);
  min-width: 0;
}
.eb-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}
.eb-header-actions { display: flex; align-items: center; gap: 2px; }
.panel-title { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--c-text-muted); }

.eb-add { padding: 10px 12px; border-bottom: 1px solid var(--c-border); flex-shrink: 0; }
#eb-input {
  width: 100%; resize: none;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  padding: 7px 9px;
  font-size: .83rem; color: var(--c-text);
  background: var(--c-bg);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  line-height: 1.5;
}
#eb-input:focus {
  outline: none; border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(0,80,160,.15);
}
#eb-add-btn { margin-top: 7px; }

#eb-cards {
  flex: 1; overflow-y: auto; padding: 8px;
  display: flex; flex-direction: column; gap: 6px;
}
#eb-cards:empty::after {
  content: 'No elements yet. Type above to add some.';
  font-size: .8rem; color: var(--c-text-muted); font-style: italic;
  text-align: center; padding: 16px 8px;
}

.kb-hint {
  padding: 6px 12px; font-size: .8rem; color: var(--c-text-muted);
  border-top: 1px solid var(--c-border); flex-shrink: 0; text-align: center;
  line-height: 1.5;
}

/* ── Collapsed EB rail ──────────────────────────────────────── */
#eb-rail {
  grid-area: eb;
  display: flex; flex-direction: column; align-items: center;
  padding: 8px 0; gap: 8px;
  border-right: 1px solid var(--c-border);
  background: var(--c-surface);
}
/* display is controlled by the [hidden] attribute — see reset above */
.eb-rail-count {
  font-size: .7rem; font-weight: 700; color: var(--c-text-muted);
  writing-mode: vertical-rl; transform: rotate(180deg); letter-spacing: .05em;
}
.eb-rail-count:empty { display: none; }

/* ── Element Card (in EB) ───────────────────────────────────── */
.eb-card {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 12px 14px;
  cursor: grab;
  user-select: none;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  position: relative;
}
.eb-card.card-entering {
  animation: card-enter var(--t-normal) ease-out both;
}
.eb-card:hover {
  border-color: var(--c-border-strong);
  box-shadow: var(--shadow-sm);
}
.eb-card:focus-within { border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(0,80,160,.12); }
.eb-card.dragging { opacity: .4; }
.eb-card.card-exiting { animation: card-exit var(--t-normal) ease-in both; }
.eb-card[draggable="true"]:active { cursor: grabbing; }

.card-row {
  display: flex; align-items: flex-start; gap: 6px;
}
.drag-handle {
  color: var(--c-border-strong);
  cursor: grab; flex-shrink: 0;
  display: flex; align-items: center;
  transition: color var(--t-fast);
}
/* EB: show on hover; AM: always show */
.eb-card:hover .drag-handle { color: var(--c-text-muted); }
.am-card .drag-handle { color: var(--c-border-strong); opacity: 1; }
.am-card:hover .drag-handle { color: var(--c-text-muted); }

.card-body { flex: 1; min-width: 0; }
.card-title-text {
  font-size: 1rem; font-weight: 600; color: var(--c-text);
  cursor: text; display: block;
  word-break: break-word; overflow-wrap: break-word;
}
.card-title-text:empty::before { content: 'Untitled'; color: var(--c-text-muted); }
.card-title-input {
  display: none; width: 100%; border: none; background: none;
  font-size: 1rem; font-weight: 600; color: var(--c-text);
  padding: 0; outline: none;
}
.card-title-input.active { display: block; }
.card-title-text.hidden { display: none; }

.card-desc-text {
  font-size: .85rem; color: var(--c-text-muted); margin-top: 4px;
  cursor: text; display: block; line-height: 1.5;
}
.card-desc-text.is-empty { display: none; }
.add-desc-btn {
  font-size: .8rem; color: var(--c-text-muted);
  background: none; border: none; padding: 2px 0; margin-top: 2px;
  cursor: pointer; opacity: 0; transition: opacity var(--t-fast);
  text-align: left; line-height: 1.5; display: block;
}
.eb-card:hover .add-desc-btn,
.eb-card:focus-within .add-desc-btn,
.am-card:hover .add-desc-btn,
.am-card:focus-within .add-desc-btn { opacity: 1; }
.add-desc-btn.is-hidden { display: none; }
.card-desc-input {
  display: none; width: 100%; border: none; background: none;
  font-size: .85rem; color: var(--c-text-muted); padding: 0; resize: none;
  outline: none; line-height: 1.5; overflow: hidden;
}
.card-desc-input.active { display: block; }
.card-desc-text.hidden { display: none; }

.card-delete-btn {
  flex-shrink: 0; min-width: 44px; min-height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; font-size: 1.1rem; color: transparent;
  transition: background var(--t-fast), color var(--t-fast);
  align-self: flex-start;
}
.eb-card:hover .card-delete-btn,
.eb-card:focus-within .card-delete-btn { color: var(--c-text-muted); }
.card-delete-btn:hover { background: var(--c-danger-light); color: var(--c-danger) !important; }
.card-delete-btn:focus-visible { outline: 2px solid var(--c-danger); outline-offset: 2px; color: var(--c-danger) !important; }

/* ── EB card reorder drop indicator (Feature 6) ─────────────── */
.eb-card.eb-drop-before {
  border-top: 2px solid var(--c-accent);
  margin-top: 4px;
}

/* ── Architecture Map ───────────────────────────────────────── */
#architecture-map {
  grid-area: am;
  display: flex; flex-direction: column;
  overflow: hidden;
  background: var(--c-bg);
}
.am-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0; flex-wrap: wrap;
}
.am-hint { font-size: .75rem; color: var(--c-text-muted); flex-basis: 100%; order: 10; margin-top: 2px; line-height: 1.5; }
.am-bulk-actions { display: flex; gap: 4px; margin-left: auto; }

/* Site name field embedded in the AM header */
.am-sitename {
  display: flex; align-items: center; gap: 6px;
  margin-left: 8px;
}
.am-sitename__label {
  font-size: .72rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .05em; color: var(--c-text-muted);
  white-space: nowrap;
}
.am-sitename .preview-sitename__input {
  height: 26px;
  padding: 0 8px;
  font-size: .8rem;
  border-radius: var(--r-sm);
  width: 120px;
}

#am-canvas {
  flex: 1; overflow: auto; padding: 16px;
  position: relative;
  outline: none;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;      /* stack utility below main nav on narrow screens */
  align-items: flex-start;
  gap: 20px;
}
/* Two-column layout: main IA tree | utility menu — equal 50/50 split */
.am-col { flex: 1 1 0; min-width: 0; }
.am-col--main {
  flex: 1 1 200px;      /* grows equally with utility; wraps below ~420px canvas width */
}
.am-col--utility {
  flex: 1 1 200px;      /* same growth rate as main → true 50/50 */
  max-width: none;      /* no artificial cap */
  margin-left: 0;       /* gap on #am-canvas handles spacing */
  padding-left: 20px;
  border-left: 2px dashed var(--c-border);
}
/* When in side-by-side layout, remove the top border/margin from the utility zone */
.am-col--utility .am-zone-utility {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}
.am-col--utility .am-add-zone-btn {
  margin-top: 0;
}
/* Stacked layout (narrow canvas): switch left border to top border */
@media (max-width: 720px) {
  .am-col--utility {
    padding-left: 0;
    border-left: none;
  }
}
#am-tree {
  display: inline-block;
  min-width: 100%;
}
#am-canvas:focus-visible { box-shadow: inset 0 0 0 2px var(--c-accent); outline: none; }

#am-tree { display: flex; flex-direction: column; gap: 0; }

.am-status {
  padding: 4px 16px 6px;
  font-size: .75rem; color: var(--c-accent);
  min-height: 22px; flex-shrink: 0;
  font-style: italic;
}

/* ── Drop zones (empty-state root target) ───────────────────── */
.drop-zone--root {
  min-height: 60px; border-radius: var(--r-md);
  border: 2px dashed var(--c-border);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.drop-zone--root:empty::before {
  content: 'Drag cards here to start your IA';
  font-size: .82rem; color: var(--c-text-muted); font-style: italic;
}
.drop-zone--root .drop-zone__label { font-size: .82rem; color: var(--c-text-muted); }
.drop-zone--root.drag-over,
.drop-zone--root.kb-highlight {
  background: var(--c-accent-light); border-color: var(--c-accent);
  border-style: solid;
}

/* ── Proximity drop line ────────────────────────────────────── */

/* The single line that appears between / around cards during drag */
.am-drop-line {
  position: absolute;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
  pointer-events: none;
  z-index: 30;
  /* Dot at the left end to make the line more visible */
}
.am-drop-line::before {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  background: var(--c-accent);
  border-radius: 50%;
  top: -3px; left: -4px;
}

/* Card highlighted as a nest target */
.am-card.drop-nest-target {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
  background: var(--c-accent-light) !important;
}

/* ── AM Tree nodes ──────────────────────────────────────────── */
.tree-node {
  position: relative;
}
.tree-node.card-exiting { animation: card-exit var(--t-normal) ease-in both; }

.tree-children {
  margin-left: 24px;
  padding-left: 16px;
  border-left: 2px solid var(--c-border);
  transition: border-color var(--t-fast);
}
.tree-node:hover > .tree-children { border-color: var(--c-border-strong); }

/* AM page card */
.am-card {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 14px 16px;
  margin: 6px 0;
  cursor: grab;
  user-select: none;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  position: relative;
  overflow: visible; /* allow focus outlines and drop-nest outline to render outside bounds */
  width: 100%;
  min-width: 0;
}
.am-card:hover { border-color: var(--c-border-strong); box-shadow: var(--shadow-md); }
.am-card:focus-within { box-shadow: 0 0 0 3px rgba(0,80,160,.15); }
.am-card.dragging { opacity: .35; }
.am-card.kb-selected {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(0,80,160,.25);
  background: var(--c-accent-light);
}
.am-card.kb-moving {
  border-color: var(--c-amber);
  box-shadow: 0 0 0 3px rgba(245,158,11,.25);
  background: var(--c-amber-light);
}
.am-card[draggable="true"]:active { cursor: grabbing; }

/* Nested element card (inside a page) */
.am-card.is-nested {
  background: var(--c-nested-bg);
  border-color: #BFD9F8;
  padding: 10px 14px;
  /* Fill parent card's content width; don't overflow */
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.am-card-header { display: flex; align-items: flex-start; gap: 6px; }
.tree-toggle {
  flex-shrink: 0; min-width: 44px; min-height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; color: var(--c-text); border-radius: 4px;
  transition: background var(--t-fast), transform var(--t-fast);
}
.tree-toggle:hover { background: var(--c-bg); color: var(--c-text); }
.tree-toggle:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 1px; }
.tree-toggle.collapsed { transform: rotate(-90deg); }
.tree-toggle--hidden { visibility: hidden; pointer-events: none; }

.am-card-actions {
  margin-left: auto; display: flex; flex-direction: column; gap: 0; flex-shrink: 0; align-items: center;
}
.am-action-btn {
  min-width: 44px; min-height: 44px; border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; color: transparent;
  transition: background var(--t-fast), color var(--t-fast);
}
.am-card:hover .am-action-btn,
.am-card:focus-within .am-action-btn { color: var(--c-text-muted); }
.am-action-btn:hover { background: var(--c-bg); color: var(--c-text) !important; }
.am-action-btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 1px; color: var(--c-text-muted) !important; }
.am-action-btn--danger:hover { background: var(--c-danger-light); color: var(--c-danger) !important; }

/* Collapsed badge */
.collapsed-badge {
  display: none; font-size: .7rem; color: var(--c-text-muted);
  padding: 1px 7px; background: var(--c-bg); border: 1px solid var(--c-border);
  border-radius: 10px; margin-top: 4px; width: fit-content;
}
.tree-node.is-collapsed > .am-card .collapsed-badge { display: inline-block; }
.tree-node.is-collapsed > .tree-children { display: none; }

/* Nested cards area */
.nested-cards {
  margin-top: 6px; padding-top: 6px;
  border-top: 1px solid var(--c-border);
  display: flex; flex-direction: column; gap: 4px;
}

/* ── Dialogs ────────────────────────────────────────────────── */
.dialog-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--c-border);
}
.dialog-header h2 { font-size: 1rem; font-weight: 600; }
.dialog-close {
  min-width: 44px; min-height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--c-text-muted);
  transition: background var(--t-fast), color var(--t-fast);
}
.dialog-close:hover { background: var(--c-bg); color: var(--c-text); }
.dialog-close:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.dialog-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 14px 20px;
}

#confirm-dialog { max-width: 380px; }
#confirm-dialog p { padding: 14px 20px 0; font-size: .88rem; color: var(--c-text-muted); }

/* Shortcuts dialog */
#shortcuts-dialog { max-width: 560px; width: 95vw; }
.shortcuts-body {
  padding: 0;
  max-height: 72vh;
  overflow-y: auto;
}
.shortcut-section {
  padding: 16px 24px 12px;
}
.shortcut-section + .shortcut-section {
  border-top: 1px solid var(--c-border);
}
.shortcut-section-title {
  font-size: .72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .07em; color: var(--c-text-muted);
  margin-bottom: 10px;
}
.shortcut-list {
  display: flex; flex-direction: column; gap: 0;
}
.shortcut-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 6px 0;
}
.shortcut-row + .shortcut-row {
  border-top: 1px solid var(--c-bg);
}
.shortcut-row dt {
  display: flex; gap: 4px; flex-wrap: wrap; align-items: center;
  font-size: .85rem;
}
.shortcut-row dd {
  font-size: .88rem; color: var(--c-text-muted); line-height: 1.5;
}
.shortcut-context {
  font-size: .75rem; color: var(--c-text-muted); font-style: italic;
  white-space: nowrap;
}

/* ── Animations ─────────────────────────────────────────────── */
@keyframes card-enter {
  from { opacity: 0; transform: translateY(-8px) scale(.97); }
  to   { opacity: 1; transform: translateY(0)   scale(1);    }
}
@keyframes card-exit {
  from { opacity: 1; transform: scale(1);    max-height: 120px; }
  to   { opacity: 0; transform: scale(.85);  max-height: 0; padding: 0; margin: 0; }
}
@keyframes drop-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,80,160,.4); }
  50%       { box-shadow: 0 0 0 6px rgba(0,80,160,0); }
}
@keyframes bounce-in {
  0%   { transform: scale(.9); }
  60%  { transform: scale(1.04); }
  100% { transform: scale(1); }
}
@keyframes pulse-moving {
  0%, 100% { box-shadow: 0 0 0 3px rgba(245,158,11,.25); }
  50%       { box-shadow: 0 0 0 6px rgba(245,158,11,.10); }
}

.tree-node.just-dropped > .am-card { animation: bounce-in var(--t-normal) ease-out both; }
.drop-zone--root.drag-over { background: var(--c-accent-light); border-color: var(--c-accent); border-style: solid; }

/* ── Utility Menu zone (Feature 8) ─────────────────────────── */
.am-zone-utility {
  margin-top: 16px;
  border-top: 2px dashed var(--c-border);
  padding-top: 12px;
}
.am-zone-utility-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.am-zone-label {
  font-size: .72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .07em; color: var(--c-text-muted);
}
.am-add-zone-btn {
  margin-top: 12px;
  border-style: dashed;
  color: var(--c-text-muted);
  font-size: .78rem;
}
.am-add-zone-btn:hover:not(:disabled) {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* Utility nav in desktop preview */
.preview-utility-nav {
  display: flex; align-items: stretch;
  list-style: none;
  padding: 0 4px;
  overflow: visible;
  margin-left: auto;
  border-left: 1px solid #E2E8F0;
}

/* Utility nav in mobile preview */
.pmob-utility-divider {
  height: 1px; background: #E2E8F0; margin: 4px 0;
}
.pmob-utility-nav {
  opacity: .85;
}

/* ── Reduced motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* ── Focus styles ───────────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.eb-card:focus { outline: none; }
.am-card:focus { outline: none; }

/* ── Scrollbars (subtle) ────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-text-muted); }

/* ── Drag-over / kb-move body class (show all drop zones) ───── */
body.is-dragging #am-canvas,
body.is-kb-moving #am-canvas { background: #EEF4FF; }
body.is-dragging .drop-zone--root { display: flex !important; }

/* ── EB collapsed state ─────────────────────────────────────── */
#workspace.eb-collapsed #element-box { opacity: 0; pointer-events: none; overflow: hidden; }