/* Variant A — Paper components
   Editorial. Narrow column. Gutter holds the section number.
   Single accent, applied sparingly. */

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--pds-bg);
  color: var(--pds-fg);
  font-family: var(--pds-font-sans);
  font-size: var(--pds-text-base);
  line-height: var(--pds-leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--pds-accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

/* Shell */
.plan-doc {
  max-width: var(--pds-wide-width);
  margin: 0 auto;
  padding: var(--pds-space-16) var(--pds-space-6) var(--pds-space-24);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pds-space-12);
}
@media (min-width: 1100px) {
  .plan-doc { grid-template-columns: 12rem 1fr; padding-top: var(--pds-space-20); }
}
.plan-doc__main { max-width: var(--pds-content-width); }

/* Header */
.plan-header { margin-bottom: var(--pds-space-12); }
.plan-header__eyebrow {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--pds-tracking-caps);
  color: var(--pds-fg-subtle);
  margin-bottom: var(--pds-space-4);
  display: flex; align-items: center; gap: var(--pds-space-2);
}
.plan-header__eyebrow .dot { width: 5px; height: 5px; background: var(--pds-accent); border-radius: 50%; }
.plan-header__title {
  font-family: var(--pds-font-serif);
  font-size: var(--pds-text-4xl);
  font-weight: 600;
  line-height: var(--pds-leading-tight);
  letter-spacing: var(--pds-tracking-tight);
  color: var(--pds-fg-strong);
  margin: 0 0 var(--pds-space-3);
}
.plan-header__context {
  font-family: var(--pds-font-serif);
  font-size: var(--pds-text-lg);
  line-height: var(--pds-leading-relaxed);
  font-style: italic;
  color: var(--pds-fg-muted);
  max-width: 34rem;
  margin: 0;
}
.plan-header__meta { margin-top: var(--pds-space-6); display: flex; flex-wrap: wrap; gap: var(--pds-space-3); }

/* Chips — uniform muted look. Single accent only on hover/active state. */
.pds-chip {
  display: inline-flex; align-items: center;
  height: 1.4rem; padding: 0 var(--pds-space-3);
  border-radius: var(--pds-radius-pill);
  background: transparent;
  color: var(--pds-fg-muted);
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  letter-spacing: 0;
  border: 1px solid var(--pds-border-strong);
  white-space: nowrap;
}
.pds-chip--accent,
.pds-chip--ok,
.pds-chip--warn,
.pds-chip--bad,
.pds-chip--info { background: transparent; color: var(--pds-fg-muted); border-color: var(--pds-border-strong); }

/* TOC — barely there */
.plan-toc {
  position: sticky; top: var(--pds-space-12); align-self: start;
  font-family: var(--pds-font-mono);
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--pds-fg-subtle);
  border-left: none;
  padding: 0;
  display: none;
}
@media (min-width: 1100px) { .plan-toc { display: block; } }
.plan-toc__label {
  text-transform: uppercase;
  letter-spacing: var(--pds-tracking-caps);
  color: var(--pds-fg-subtle);
  font-size: 0.7rem;
  margin-bottom: var(--pds-space-3);
}
.plan-toc__list { list-style: none; padding: 0; margin: 0; }
.plan-toc__item a {
  display: block; padding: var(--pds-space-1) 0;
  color: var(--pds-fg-subtle); text-decoration: none;
  transition: color var(--pds-dur-fast) var(--pds-ease);
}
.plan-toc__item a:hover { color: var(--pds-fg); }
.plan-toc__item--active a { color: var(--pds-fg-strong); font-weight: 500; }
.plan-toc__item .count { display: inline-block; margin-left: var(--pds-space-2); color: var(--pds-accent); font-weight: 600; }
.plan-toc__item .count[data-count="0"] { display: none; }

/* Sections */
.plan-section {
  position: relative;
  padding: var(--pds-space-10) 0;
  border-top: 1px solid var(--pds-border);
  scroll-margin-top: var(--pds-space-6);
}
.plan-section:first-child { border-top: none; padding-top: 0; }
.plan-section__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: var(--pds-space-4);
  margin-bottom: var(--pds-space-5);
}
.plan-section__num {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  color: var(--pds-fg-subtle);
  letter-spacing: var(--pds-tracking-caps);
  text-transform: uppercase;
  background: transparent;
  border: none;
  width: auto;
  height: auto;
  padding: 0;
}
.plan-section__num::before { content: ""; }
.plan-section__title {
  font-family: var(--pds-font-serif);
  font-size: var(--pds-text-2xl);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.005em;
  color: var(--pds-fg-strong);
  margin: 0;
}
.plan-section__actions { display: inline-flex; gap: var(--pds-space-2); opacity: 0; transition: opacity var(--pds-dur-fast) var(--pds-ease); }
.plan-section:hover .plan-section__actions { opacity: 0.7; }
.plan-section:hover .plan-section__actions:hover { opacity: 1; }

.plan-section__body { max-width: var(--pds-content-width); }
.plan-section__body > * + * { margin-top: var(--pds-space-4); }
.plan-section__body p { margin: 0; line-height: var(--pds-leading-relaxed); }
.plan-section__body h3 {
  font-family: var(--pds-font-sans);
  font-size: var(--pds-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--pds-tracking-caps);
  color: var(--pds-fg-subtle);
  margin: var(--pds-space-6) 0 0;
  font-weight: 600;
}
.plan-section__body ul, .plan-section__body ol { margin: 0; padding-left: var(--pds-space-5); }
.plan-section__body li { line-height: var(--pds-leading-snug); }
.plan-section__body li + li { margin-top: var(--pds-space-1); }

/* Inline code — NO box. Just a subtle tint and slightly smaller. */
.plan-section__body code:not(pre code) {
  font-family: var(--pds-font-mono);
  font-size: 0.86em;
  padding: 0.05em 0.25em;
  background: var(--pds-surface);
  color: var(--pds-fg-strong);
  border: none;
  border-radius: 2px;
}

.plan-section__body strong { color: var(--pds-fg-strong); font-weight: 600; }

/* Files — quiet inline list, not chips */
.plan-files {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  color: var(--pds-fg-subtle);
  letter-spacing: 0;
  display: flex; flex-wrap: wrap; gap: var(--pds-space-4);
  padding: var(--pds-space-2) 0;
  border-top: 1px solid var(--pds-border);
  border-bottom: 1px solid var(--pds-border);
  margin-bottom: var(--pds-space-2) !important;
}
.plan-files .pds-chip {
  border: none;
  padding: 0;
  height: auto;
  background: transparent;
  color: var(--pds-fg-muted);
}
.plan-files .pds-chip::before { content: ""; }

/* Callouts — thin rule, no fill */
.plan-callout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--pds-space-3);
  align-items: start;
  padding: var(--pds-space-2) 0 var(--pds-space-2) var(--pds-space-4);
  border-left: 2px solid var(--pds-border-strong);
  background: transparent;
  border-radius: 0;
  font-size: var(--pds-text-sm);
  line-height: var(--pds-leading-snug);
  color: var(--pds-fg-muted);
}
.plan-callout__icon {
  font-family: var(--pds-font-mono);
  font-size: 0.75rem;
  color: var(--pds-fg-subtle);
  margin-top: 2px;
}
.plan-callout__body strong { color: var(--pds-fg-strong); font-weight: 600; display: block; margin-bottom: var(--pds-space-1); }
.plan-callout--note { border-left-color: var(--pds-info); }
.plan-callout--note .plan-callout__icon { color: var(--pds-info); }
.plan-callout--warn { border-left-color: var(--pds-warning); }
.plan-callout--warn .plan-callout__icon { color: var(--pds-warning); }
.plan-callout--risk,
.plan-callout--danger { border-left-color: var(--pds-danger); }
.plan-callout--risk .plan-callout__icon,
.plan-callout--danger .plan-callout__icon { color: var(--pds-danger); }
.plan-callout--ok,
.plan-callout--success { border-left-color: var(--pds-success); }
.plan-callout--ok .plan-callout__icon,
.plan-callout--success .plan-callout__icon { color: var(--pds-success); }

/* Mockup — legacy ASCII fallback */
.plan-mockup {
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border);
  border-radius: var(--pds-radius-md);
  padding: var(--pds-space-5) var(--pds-space-6);
  overflow: auto;
}
.plan-mockup__label {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--pds-tracking-caps);
  color: var(--pds-fg-subtle);
  margin-bottom: var(--pds-space-3);
}
.plan-mockup pre { margin: 0; font-family: var(--pds-font-mono); font-size: 0.82rem; line-height: 1.4; color: var(--pds-fg); white-space: pre; }

/* ============================================================
   Mockup — HTML form, framed
   ============================================================ */

.mock-frame {
  --mock-chrome-fg: rgba(255, 255, 255, 0.78);
  --mock-chrome-bg: linear-gradient(180deg, #3d3a31 0%, #34312a 100%);
  --mock-bezel: #1f1d18;
  position: relative;
  margin: 0;
}

.mock-frame__label {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--pds-tracking-caps);
  color: var(--pds-fg-subtle);
  margin-bottom: var(--pds-space-3);
}

.mock-frame__shell {
  border-radius: var(--pds-radius-md);
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border);
  box-shadow: var(--pds-shadow-md);
  overflow: hidden;
}

.mock-frame__chrome {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 30px;
  padding: 0 12px;
  background: var(--mock-chrome-bg);
  color: var(--mock-chrome-fg);
  font-family: var(--pds-font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0;
  border-bottom: 1px solid rgba(0,0,0,0.4);
}

.mock-frame__dots { display: inline-flex; gap: 6px; flex: none; }
.mock-frame__dots span {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #4a4740;
  box-shadow: inset 0 0 0 0.5px rgba(0,0,0,0.3);
}
.mock-frame__dots span:nth-child(1) { background: #ee695a; }
.mock-frame__dots span:nth-child(2) { background: #f4be4f; }
.mock-frame__dots span:nth-child(3) { background: #62c554; }

.mock-frame__title {
  flex: 1;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0.85;
}

.mock-frame__urlbar {
  flex: 1;
  height: 20px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--pds-radius-pill);
  font-family: var(--pds-font-mono);
  font-size: 11px;
  letter-spacing: 0;
  color: var(--mock-chrome-fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mock-frame__urlbar::before {
  content: "🔒";
  font-size: 9px;
  margin-right: 6px;
  opacity: 0.7;
}

.mock-frame__iframe {
  display: block;
  width: 100%;
  border: 0;
  background: #ffffff;
  /* height set by runtime.js after postMessage */
}

/* --- Variant: window (default) --- */
.mock-frame--window .mock-frame__shell { /* uses base chrome */ }

/* --- Variant: browser --- */
.mock-frame--browser .mock-frame__shell { /* uses urlbar chrome */ }

/* --- Variant: none --- */
.mock-frame--none .mock-frame__chrome { display: none; }
.mock-frame--none .mock-frame__shell { border-radius: var(--pds-radius-md); }

/* --- Variant: phone --- */
.mock-frame--phone { display: flex; justify-content: center; padding: var(--pds-space-4) 0; }
.mock-frame--phone .mock-frame__shell {
  width: 22rem;
  max-width: 100%;
  border-radius: 32px;
  background: var(--mock-bezel);
  border: 1px solid var(--mock-bezel);
  padding: 12px 8px;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 24px 60px rgba(0, 0, 0, 0.22),
    0 4px 12px rgba(0, 0, 0, 0.15);
}
.mock-frame--phone .mock-frame__chrome {
  display: flex;
  justify-content: center;
  background: transparent;
  border-bottom: none;
  height: 22px;
  padding: 0;
  position: relative;
}
.mock-frame--phone .mock-frame__chrome::before {
  /* notch */
  content: "";
  width: 70px;
  height: 18px;
  background: #050505;
  border-radius: 0 0 14px 14px;
  display: block;
}
.mock-frame--phone .mock-frame__dots,
.mock-frame--phone .mock-frame__title,
.mock-frame--phone .mock-frame__urlbar { display: none; }
.mock-frame--phone .mock-frame__iframe {
  border-radius: 22px;
  background: #ffffff;
}
.mock-frame--phone .mock-frame__shell::after {
  /* home indicator */
  content: "";
  display: block;
  width: 110px;
  height: 4px;
  background: #5b5b5b;
  border-radius: 999px;
  margin: 8px auto 2px;
}

/* mobile viewport when desktop frames are forced into mobile */
.mock-frame[data-viewport="mobile"] .mock-frame__iframe {
  width: 24rem;
  max-width: 100%;
  margin: 0 auto;
}


/* Diagram */
.plan-diagram {
  position: relative;
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border);
  border-radius: var(--pds-radius-md);
  padding: var(--pds-space-6);
  display: flex; justify-content: center; overflow-x: auto;
  min-height: 220px;
}
.plan-diagram svg { max-width: 100%; height: auto; }

/* Error state — surfaced when mermaid throws on render */
.plan-diagram--error {
  display: block;
  background: var(--pds-warning-soft, #fef3c7);
  border-color: var(--pds-warning, #d97706);
  border-left: 3px solid var(--pds-warning, #d97706);
  padding: var(--pds-space-4) var(--pds-space-5);
  text-align: left;
  min-height: 0;
}
.plan-diagram-error__head {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600; color: var(--pds-warning, #b45309);
  font-family: var(--pds-font-sans);
  font-size: var(--pds-text-sm);
  margin-bottom: var(--pds-space-2);
}
.plan-diagram-error__msg {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  color: var(--pds-fg);
  margin-bottom: var(--pds-space-3);
  line-height: var(--pds-leading-snug);
}
.plan-diagram-error__src {
  margin: 0;
  background: var(--pds-bg);
  border: 1px solid var(--pds-border);
  border-radius: var(--pds-radius-sm);
  padding: var(--pds-space-3);
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  color: var(--pds-fg-strong);
  overflow-x: auto;
  white-space: pre;
}
.plan-diagram__zoom {
  position: absolute;
  top: var(--pds-space-2); right: var(--pds-space-2);
  appearance: none;
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--pds-bg);
  border: 1px solid var(--pds-border-strong);
  color: var(--pds-fg-muted);
  font-family: var(--pds-font-mono); font-size: var(--pds-text-xs);
  padding: 4px 9px; border-radius: var(--pds-radius-pill);
  cursor: pointer; line-height: 1;
  transition: color 120ms ease, border-color 120ms ease, background 120ms ease;
}
.plan-diagram__zoom:hover {
  color: var(--pds-accent);
  border-color: var(--pds-accent);
  background: var(--pds-accent-soft);
}
.plan-diagram__zoom svg { width: 11px; height: 11px; }

/* Fullscreen diagram modal */
.diagram-modal {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(10, 12, 16, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 180ms ease;
}
.diagram-modal.open { opacity: 1; pointer-events: auto; }
.diagram-modal__stage {
  position: relative;
  width: 92vw; height: 88vh;
  background: var(--pds-bg);
  border-radius: var(--pds-radius-lg);
  box-shadow: var(--pds-shadow-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.diagram-modal__head {
  display: flex; align-items: center; gap: var(--pds-space-2);
  padding: var(--pds-space-3) var(--pds-space-4);
  border-bottom: 1px solid var(--pds-border);
  background: var(--pds-surface);
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  color: var(--pds-fg-muted);
}
.diagram-modal__head .spacer { flex: 1; }
.diagram-modal__btn {
  appearance: none;
  background: var(--pds-bg);
  border: 1px solid var(--pds-border-strong);
  color: var(--pds-fg);
  font-family: var(--pds-font-mono); font-size: var(--pds-text-xs);
  padding: 4px 10px; border-radius: var(--pds-radius-sm);
  cursor: pointer; line-height: 1;
}
.diagram-modal__btn:hover { background: var(--pds-surface); color: var(--pds-fg-strong); }
.diagram-modal__close { padding: 4px 8px; font-weight: 600; }
.diagram-modal__viewport {
  flex: 1;
  overflow: hidden;
  cursor: grab;
  background:
    linear-gradient(var(--pds-divider) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, var(--pds-divider) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--pds-bg);
}
.diagram-modal__viewport.panning { cursor: grabbing; }
.diagram-modal__inner {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  transform-origin: 0 0;
  will-change: transform;
}
.diagram-modal__inner svg {
  max-width: none;
  height: auto;
  user-select: none;
}
.diagram-modal__hint {
  position: absolute;
  bottom: var(--pds-space-3); left: 50%; transform: translateX(-50%);
  background: rgba(10, 12, 16, 0.72);
  color: white;
  font-family: var(--pds-font-mono); font-size: var(--pds-text-xs);
  padding: 6px 12px; border-radius: var(--pds-radius-pill);
  pointer-events: none;
  opacity: 0; transition: opacity 200ms ease;
}
.diagram-modal.open .diagram-modal__hint { opacity: 1; animation: diag-hint-fade 4s ease forwards; }
@keyframes diag-hint-fade {
  0% { opacity: 0; }
  10% { opacity: 1; }
  80% { opacity: 1; }
  100% { opacity: 0; }
}

/* Code block */
.plan-code {
  border-radius: var(--pds-radius-md);
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border);
  overflow: hidden;
}
.plan-code__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--pds-space-2) var(--pds-space-4);
  border-bottom: 1px solid var(--pds-border);
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  color: var(--pds-fg-subtle);
}
.plan-code pre { margin: 0 !important; padding: var(--pds-space-4) var(--pds-space-5) !important; background: transparent !important; font-size: 0.82rem; line-height: 1.55; overflow-x: auto; }
.plan-code__copy {
  appearance: none; background: transparent; border: none;
  color: var(--pds-fg-subtle); font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs); padding: 2px 6px; cursor: pointer;
}
.plan-code__copy:hover { color: var(--pds-fg-strong); }
.plan-code__copy.copied { color: var(--pds-success); }

/* Tables */
.plan-section__body table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: var(--pds-text-sm); border: 1px solid var(--pds-border); border-radius: var(--pds-radius-md); overflow: hidden; }
.plan-section__body th, .plan-section__body td { padding: var(--pds-space-2) var(--pds-space-3); text-align: left; border-bottom: 1px solid var(--pds-border); }
.plan-section__body th { background: var(--pds-surface); font-size: var(--pds-text-xs); text-transform: uppercase; letter-spacing: var(--pds-tracking-caps); color: var(--pds-fg-muted); font-weight: 600; }
.plan-section__body tr:last-child td { border-bottom: none; }

/* Panels */
.plan-panel {
  margin-top: var(--pds-space-16);
  padding: var(--pds-space-8) 0 0;
  border-top: 1px solid var(--pds-border);
  background: transparent;
  border-radius: 0;
}
.plan-panel--risks { border-top-color: var(--pds-border-strong); }
.plan-panel__title { font-family: var(--pds-font-mono); font-size: var(--pds-text-xs); text-transform: uppercase; letter-spacing: var(--pds-tracking-caps); color: var(--pds-fg-subtle); margin: 0 0 var(--pds-space-4); font-weight: 600; }
.plan-panel--risks .plan-panel__title { color: var(--pds-warning); }
.plan-panel__list { list-style: none; padding: 0; margin: 0; }

/* Each risk / open-question is its own keyed section so it can host a comment thread */
.plan-panel__item {
  padding: var(--pds-space-3) 0;
  border-bottom: 1px dashed var(--pds-border);
}
.plan-panel__item:last-child { border-bottom: none; }
.plan-panel__item-head {
  display: flex; align-items: flex-start; gap: var(--pds-space-3);
  font-size: var(--pds-text-base);
  line-height: var(--pds-leading-snug);
}
.plan-panel__item-marker {
  flex: none;
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.5rem; height: 1.5rem;
  border-radius: 50%;
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  font-weight: 700;
  margin-top: 1px;
}
.plan-panel--risks .plan-panel__item-marker {
  background: var(--pds-warning-soft, #fef3c7);
  color: var(--pds-warning);
}
.plan-panel--questions .plan-panel__item-marker {
  background: var(--pds-info-soft, #dbeafe);
  color: var(--pds-info);
}
.plan-panel__item-text { flex: 1; min-width: 0; padding-top: 1px; }
.plan-panel__item-text > *:first-child { margin-top: 0; }
.plan-panel__item-text > *:last-child { margin-bottom: 0; }
.plan-panel__item .comment-btn {
  flex: none;
  appearance: none; background: transparent; border: 1px solid transparent;
  color: var(--pds-fg-subtle); font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs); padding: 2px 8px; border-radius: var(--pds-radius-pill);
  cursor: pointer; line-height: 1.4;
  white-space: nowrap;
}
.plan-panel__item .comment-btn:hover { color: var(--pds-accent); border-color: var(--pds-border-strong); }
.plan-panel__item .comment-btn[data-count]:not([data-count="0"]) {
  color: var(--pds-accent); border-color: var(--pds-accent);
}
.plan-panel__item .plan-comments { margin-top: var(--pds-space-3); }

/* Comments — quiet by default, accent only when there are comments */
.plan-section__actions .comment-btn {
  appearance: none; background: transparent; border: 1px solid transparent;
  color: var(--pds-fg-subtle); font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs); padding: 2px 8px; border-radius: var(--pds-radius-pill);
  cursor: pointer;
}
.plan-section__actions .comment-btn:hover { color: var(--pds-accent); border-color: var(--pds-border-strong); }
.plan-section__actions .comment-btn[data-count]:not([data-count="0"]) { color: var(--pds-accent); border-color: var(--pds-accent); opacity: 1; }

.plan-comments {
  margin-top: var(--pds-space-5); padding: var(--pds-space-4) var(--pds-space-5);
  background: var(--pds-accent-soft);
  border-left: 2px solid var(--pds-accent);
  border-radius: var(--pds-radius-md);
  display: none;
}
.plan-comments.open { display: block; }
.plan-comments__list { margin: 0 0 var(--pds-space-3); padding: 0; list-style: none; }
.plan-comments__item { display: flex; gap: var(--pds-space-3); padding: var(--pds-space-2) 0; border-bottom: 1px solid rgba(0,0,0,0.05); font-size: var(--pds-text-sm); line-height: var(--pds-leading-snug); color: var(--pds-fg); }
.plan-comments__item:last-child { border-bottom: none; }
.plan-comments__item .who { flex: none; font-family: var(--pds-font-mono); font-size: var(--pds-text-xs); color: var(--pds-fg-muted); width: 4.5rem; }
.plan-comments__item .text { flex: 1; white-space: pre-wrap; }
.plan-comments__item .del { background: transparent; border: none; color: var(--pds-fg-subtle); cursor: pointer; font-size: var(--pds-text-base); }
.plan-comments__item .del:hover { color: var(--pds-danger); }
.plan-comments__form { display: flex; gap: var(--pds-space-2); }
.plan-comments__form textarea {
  flex: 1; resize: vertical; min-height: 2.4rem;
  font-family: var(--pds-font-sans); font-size: var(--pds-text-sm); line-height: var(--pds-leading-snug);
  color: var(--pds-fg); background: var(--pds-bg-elev); border: 1px solid var(--pds-border);
  border-radius: var(--pds-radius-sm); padding: var(--pds-space-2) var(--pds-space-3);
}
.plan-comments__form textarea:focus { outline: none; border-color: var(--pds-accent); }
.plan-comments__form button {
  background: var(--pds-accent); color: var(--pds-accent-fg);
  font-family: var(--pds-font-mono); font-size: var(--pds-text-xs);
  border: none; padding: 0 var(--pds-space-3); border-radius: var(--pds-radius-sm);
  cursor: pointer;
}

/* Action bar */
.plan-actionbar {
  position: fixed; bottom: var(--pds-space-6); left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: var(--pds-space-2);
  padding: var(--pds-space-2) var(--pds-space-3);
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border-strong);
  border-radius: var(--pds-radius-pill);
  box-shadow: var(--pds-shadow-lg);
  z-index: 50; font-family: var(--pds-font-mono); font-size: var(--pds-text-xs);
}
.plan-actionbar__count { padding: 0 var(--pds-space-3); color: var(--pds-fg-muted); }
.plan-actionbar__count strong { color: var(--pds-accent); font-weight: 600; }
.plan-actionbar button {
  background: transparent; color: var(--pds-fg); border: 1px solid transparent;
  font-family: var(--pds-font-mono); font-size: var(--pds-text-xs);
  padding: var(--pds-space-2) var(--pds-space-4); border-radius: var(--pds-radius-pill);
  cursor: pointer;
}
.plan-actionbar button:hover { background: var(--pds-surface); }
.plan-actionbar .primary { background: var(--pds-accent); color: var(--pds-accent-fg); }
.plan-actionbar .ghost { color: var(--pds-fg-muted); }

.plan-toast {
  position: fixed; top: var(--pds-space-6); left: 50%;
  transform: translateX(-50%) translateY(-200%);
  background: var(--pds-fg-strong); color: var(--pds-bg);
  font-family: var(--pds-font-mono); font-size: var(--pds-text-sm);
  padding: var(--pds-space-2) var(--pds-space-5); border-radius: var(--pds-radius-pill);
  box-shadow: var(--pds-shadow-md); z-index: 60;
  transition: transform var(--pds-dur-base) var(--pds-ease);
}
.plan-toast.show { transform: translateX(-50%) translateY(0); }

/* ============================================================
   Version diff
   ============================================================ */
.diff-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--pds-font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: var(--pds-radius-pill);
  margin-left: var(--pds-space-3);
}
.diff-badge--add { background: var(--pds-success-soft, #dcfce7); color: var(--pds-success, #16a34a); }
.diff-badge--change { background: var(--pds-accent-soft); color: var(--pds-accent); }
.diff-badge--move { background: var(--pds-warning-soft, #fef3c7); color: var(--pds-warning, #b45309); }
.diff-badge--same { background: var(--pds-surface); color: var(--pds-fg-muted); }

.plan-section--diff-add { border-left: 3px solid var(--pds-success, #16a34a); padding-left: var(--pds-space-4); }
.plan-section--diff-change { border-left: 3px solid var(--pds-accent); padding-left: var(--pds-space-4); }
.plan-section--diff-move { border-left: 3px solid var(--pds-warning, #d97706); padding-left: var(--pds-space-4); }

.plan-section__diff {
  margin-top: var(--pds-space-4);
  padding: var(--pds-space-3) 0 0;
  border-top: 1px dashed var(--pds-border);
}
.plan-section__diff-label {
  font-family: var(--pds-font-mono);
  font-size: 11px;
  color: var(--pds-fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--pds-space-2);
}
.plan-diff-block {
  font-family: var(--pds-font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border);
  border-radius: var(--pds-radius-sm);
  overflow: hidden;
}
.diff-line {
  display: flex;
  align-items: flex-start;
  padding: 1px 8px;
  white-space: pre-wrap;
  word-break: break-word;
}
.diff-line--add { background: rgba(22, 163, 74, 0.10); color: var(--pds-success, #166534); }
.diff-line--del { background: rgba(220, 38, 38, 0.10); color: var(--pds-danger, #991b1b); text-decoration: line-through; text-decoration-color: rgba(220, 38, 38, 0.4); }
.diff-line--same { color: var(--pds-fg-muted); }
.diff-line__marker {
  flex: none;
  width: 14px;
  color: inherit;
  opacity: 0.7;
  text-align: center;
  user-select: none;
}
.diff-line__text { flex: 1; }

.plan-removed-panel {
  margin-top: var(--pds-space-12);
  padding: var(--pds-space-5);
  background: rgba(220, 38, 38, 0.05);
  border: 1px dashed rgba(220, 38, 38, 0.3);
  border-radius: var(--pds-radius-md);
}
.plan-removed-panel__title {
  font-family: var(--pds-font-mono);
  font-size: var(--pds-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--pds-danger, #991b1b);
  margin: 0 0 var(--pds-space-3);
  font-weight: 600;
}
.plan-removed-panel__item {
  padding: var(--pds-space-2) 0;
  border-bottom: 1px dashed rgba(220, 38, 38, 0.2);
}
.plan-removed-panel__item:last-child { border-bottom: none; }

/* ============================================================
   Share menu
   ============================================================ */
.share-menu {
  position: fixed;
  bottom: calc(var(--pds-space-6) + 60px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 360px;
  max-width: calc(100vw - 32px);
  background: var(--pds-bg-elev);
  border: 1px solid var(--pds-border-strong);
  border-radius: var(--pds-radius-md);
  box-shadow: var(--pds-shadow-lg);
  z-index: 55;
  padding: var(--pds-space-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms var(--pds-ease), transform 160ms var(--pds-ease);
}
.share-menu[hidden] { display: none; }
.share-menu.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.share-menu__item {
  display: flex;
  align-items: flex-start;
  gap: var(--pds-space-3);
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--pds-radius-sm);
  padding: var(--pds-space-3);
  cursor: pointer;
  font-family: var(--pds-font-sans);
  color: var(--pds-fg);
  font-size: var(--pds-text-sm);
  line-height: var(--pds-leading-snug);
}
.share-menu__item:hover {
  background: var(--pds-surface);
  border-color: var(--pds-border);
}
.share-menu__icon {
  flex: none;
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--pds-accent-soft);
  color: var(--pds-accent);
  font-family: var(--pds-font-mono);
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--pds-radius-sm);
}
.share-menu__body {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  gap: 2px;
}
.share-menu__body strong { font-weight: 600; color: var(--pds-fg-strong); }
.share-menu__body .muted { font-size: 12px; color: var(--pds-fg-muted); }

/* ============================================================
   Print stylesheet
   ============================================================ */
@media print {
  .plan-actionbar,
  .share-menu,
  .plan-toc,
  .plan-toast,
  .plan-section__actions,
  .plan-diagram__zoom,
  .diagram-modal,
  .comment-btn { display: none !important; }

  body { background: white; color: black; }
  .plan-doc { display: block; }
  .plan-doc__main { max-width: none; padding: 0; }

  .plan-section,
  .plan-diagram,
  .plan-code,
  .mock-frame { page-break-inside: avoid; break-inside: avoid; }

  .plan-comments { display: block !important; background: transparent !important; padding: 0; margin-top: 8pt; border: none; border-left: 2px solid #999; padding-left: 8pt; }
  .plan-comments__form { display: none !important; }
  .plan-comments__list { margin: 0; }
  .plan-section .plan-comments:not(:has(.plan-comments__item)) { display: none !important; }
}