/* ================= Piece B: the problem, the concept, the modules ================= */
/* Tokens come from variables.css (already loaded via base.css). Classes prefixed cn-. */

.cn-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;
}

/* Shared deck rule: every section opener gets ONE .sub-sized paragraph, capped well under 660px */
.cn-deck { max-width: 600px; margin-top: var(--spacing-16); }

/* ---------------------------------------------------------------
   B1 — Fragmentation problem
--------------------------------------------------------------- */
.cn-frag-inner {
  display: grid;
  grid-template-columns: minmax(0, 560px) 1fr;
  gap: var(--spacing-64);
  align-items: center;
}

.cn-frag-copy { display: flex; flex-direction: column; gap: var(--spacing-24); }
.cn-frag-heading { color: var(--color-ink-black); }
.cn-frag-sub { color: var(--color-slate-gray); }

.cn-frag-quote {
  max-width: 46ch;
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w450);
  line-height: var(--leading-subheading);
  color: var(--color-ink-black);
  margin: 0;
  padding-left: 20px;
  border-left: 2px solid var(--color-ash-gray);
}
.cn-frag-quote em { font-style: italic; }

/* Scattered, disconnected tool chips — no lines join them */
.cn-frag-scatter {
  position: relative;
  min-height: 420px;
}

.cn-frag-chip {
  position: absolute;
  width: 176px;
  padding: 16px 18px 14px;
}
.cn-frag-chip-name { display: block; font-family: var(--font-ui); font-size: var(--text-body-lg); font-weight: 500; color: var(--color-ink-black); letter-spacing: -0.2px; }
.cn-frag-chip-line { display: block; margin-top: 4px; font-size: 14px; color: var(--color-slate-gray); }

.cn-frag-chip--1 { top: 2%;  left: 6%;  transform: rotate(-4deg); }
.cn-frag-chip--2 { top: 0%;  left: 52%; transform: rotate(3deg); }
.cn-frag-chip--3 { top: 30%; left: 20%; transform: rotate(2deg); }
.cn-frag-chip--4 { top: 34%; left: 62%; transform: rotate(-3deg); }
.cn-frag-chip--5 { top: 64%; left: 4%;  transform: rotate(3deg); }
.cn-frag-chip--6 { top: 68%; left: 46%; transform: rotate(-2deg); }

/* ---------------------------------------------------------------
   B2 — The connected chain (dark, full-bleed)
   One record (sticky, left) + one drawn rail with nine stops (right).
   Deliberately NOT a grid of equal cards — a sequence, not a set.
--------------------------------------------------------------- */
.cn-chain-head { max-width: 640px; margin-bottom: var(--spacing-64); }
.cn-chain-heading { color: var(--color-paper-white); }
.cn-chain-sub { color: var(--color-smoke-gray); }

.cn-chain-body {
  position: relative;
  display: grid;
  grid-template-columns: minmax(240px, 300px) 1fr;
  gap: var(--spacing-64);
  align-items: start;
}

/* Decorative watermark bleeding past the content column — desktop only */
.cn-chain-mark {
  display: none;
  position: absolute;
  left: -104px;
  top: -34px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 168px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.05);
  pointer-events: none;
  user-select: none;
}

/* The record: one continuous object, pinned while the rail advances beside it */
.cn-chain-record {
  position: sticky;
  top: 128px;
  background: var(--surface);
  border-radius: var(--radius-cards);
  border: 1px solid var(--line);
  padding: var(--spacing-28) var(--spacing-24);
  box-shadow: var(--elev-mid);
}
.cn-chain-record-eyebrow { font-size: 12px; font-weight: var(--font-weight-w450); color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.1em; margin: 0; }
.cn-chain-record-id { font-family: var(--font-ui); font-size: var(--text-heading-sm); font-weight: 500; letter-spacing: -0.3px; color: var(--ink); margin: 6px 0 2px; }
.cn-chain-record-customer { font-size: var(--text-body); color: var(--ink-body); margin: 0; }

.cn-chain-record-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16) var(--spacing-20);
  margin: var(--spacing-20) 0 0;
  padding-top: var(--spacing-20);
  border-top: 1px solid var(--line);
}
.cn-chain-record-fields div { display: flex; flex-direction: column; gap: 2px; }
.cn-chain-record-fields dt { margin: 0; font-size: 12px; color: var(--ink-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.cn-chain-record-fields dd { margin: 0; font-size: var(--text-body); font-weight: 500; color: var(--ink); }

.cn-chain-record-note { margin: var(--spacing-20) 0 0; font-size: 14px; line-height: 1.5; color: var(--ink-muted); }

/* The rail: single drawn line threading nine stops of unequal weight */
.cn-chain-rail-wrap { position: relative; }
.cn-chain-rail-line {
  position: absolute;
  left: 20px;
  top: 4px;
  bottom: 26px;
  width: 2px;
  background: rgba(255, 255, 255, 0.14);
}
.cn-chain-rail-line i {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-paper-white);
  transform-origin: top;
  transform: scaleY(0.45);
}
.cn-chain-rail-line.is-in i {
  animation: cn-chain-draw 900ms var(--ease-out) both;
}
@keyframes cn-chain-draw {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}

.cn-chain-rail { list-style: none; margin: 0; padding: 0; }

.cn-chain-stop {
  position: relative;
  display: flex;
  gap: var(--spacing-20);
  padding: var(--spacing-20) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.cn-chain-rail > .cn-chain-stop:first-child { border-top: 0; padding-top: 2px; }

.cn-chain-stop-num {
  flex: 0 0 40px;
  text-align: center;
  padding-top: 2px;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.5);
}
.cn-chain-stop-body { flex: 1 1 auto; min-width: 0; }
.cn-chain-stop-name { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-family: var(--font-ui); font-size: var(--text-body-lg); font-weight: 500; color: #f7f8fa; letter-spacing: -0.2px; margin: 0 0 6px; }
.cn-chain-stop-knows { font-size: var(--text-body); line-height: var(--leading-body); color: rgba(247, 248, 250, 0.66); margin: 0; }

.cn-chain-tag {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: var(--font-weight-w450);
  padding: 2px 10px;
  border-radius: var(--radius-buttons);
  background: rgba(255, 255, 255, 0.1);
  color: #f7f8fa;
}

.cn-chain-stop--last {
  margin-top: var(--spacing-8);
  padding: var(--spacing-20) var(--spacing-20);
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-cards);
  border-top: 0;
}

/* ---------------------------------------------------------------
   B3 — Three-card row
--------------------------------------------------------------- */
.cn-pillars-heading { color: var(--color-ink-black); }
.cn-pillars-sub { color: var(--color-slate-gray); margin-bottom: var(--spacing-64); }

.cn-pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
}

.cn-pillar {
  border-radius: var(--radius-cards);
  padding: var(--spacing-32) var(--spacing-28);
}
.cn-pillar-title { font-family: var(--font-ui); font-size: var(--text-subheading); font-weight: 500; letter-spacing: -0.2px; margin: 0 0 var(--spacing-12); }
.cn-pillar-body { font-size: var(--text-body); line-height: var(--leading-body); margin: 0; }

/* accent panel uses teal tint + border; text reverts to ink via sections.css */
.cn-pillar.accent .cn-pillar-title,
.cn-pillar.accent .cn-pillar-body { color: var(--ink); }

.cn-pillar--mist { background: var(--base-alt); }
.cn-pillar--mist .cn-pillar-title { color: var(--ink); }
.cn-pillar--mist .cn-pillar-body { color: var(--ink-body); }

/* Neutral card surface uses the reference mist background */
.cn-pillar--fog { background: var(--base-alt); }
.cn-pillar--fog .cn-pillar-title { color: var(--ink); }
.cn-pillar--fog .cn-pillar-body { color: var(--ink-body); }

/* ---------------------------------------------------------------
   B4 — Modules
--------------------------------------------------------------- */
.cn-modules-sub { color: var(--color-slate-gray); margin-bottom: var(--spacing-64); }

.cn-modules-shell { border: 0; margin: 0; padding: 0; min-width: 0; }

.cn-modules-grid {
  display: grid;
  grid-template-columns: minmax(0, 380px) 1fr;
  gap: var(--spacing-64);
  align-items: start;
}

.cn-modules-list { display: flex; flex-direction: column; }

.cn-modules-visual { position: sticky; top: 112px; display: flex; flex-direction: column; gap: var(--spacing-16); }

.cn-modules-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-20) var(--spacing-20);
  border-radius: var(--radius-inputs);
  border-top: 1px solid var(--line);
  cursor: pointer;
  transition: background-color 420ms cubic-bezier(.22,.61,.36,1);
}
.cn-modules-list .cn-modules-item:last-child { border-bottom: 1px solid var(--line); }

.cn-modules-radio {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}
.cn-modules-radio:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.cn-modules-item-name { font-family: var(--font-ui); font-size: var(--text-body-lg); font-weight: 500; color: var(--ink); letter-spacing: -0.2px; }
.cn-modules-item-line { font-size: var(--text-body); color: var(--ink-body); }

.cn-modules-item:hover { background: var(--base-alt); }
/* Active state: flat accent bar instead of a heavy frame */
.cn-modules-item:has(:checked) { background: var(--surface); }
.cn-modules-item:has(:checked) .cn-modules-item-line { color: var(--ink); }
.cn-modules-item:has(:checked)::after {
  content: "";
  position: absolute;
  left: 0; top: 12px; bottom: 12px;
  width: 3px; border-radius: var(--r-bar);
  background: var(--accent);
  pointer-events: none;
}

/* Product visual — one frame, content swaps per module via :has() */
.cn-modules-frame {
  position: relative;
  min-height: 340px;
  padding: var(--spacing-28) var(--spacing-28) var(--spacing-24);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  box-shadow: var(--elev-mid);
}

.cn-modules-panel {
  display: none;
  flex-direction: column;
  gap: var(--spacing-12);
}
.cn-modules-shell:has(input[value="crm"]:checked)       .cn-modules-panel[data-panel="crm"],
.cn-modules-shell:has(input[value="sales"]:checked)      .cn-modules-panel[data-panel="sales"],
.cn-modules-shell:has(input[value="orders"]:checked)     .cn-modules-panel[data-panel="orders"],
.cn-modules-shell:has(input[value="inventory"]:checked)  .cn-modules-panel[data-panel="inventory"],
.cn-modules-shell:has(input[value="projects"]:checked)   .cn-modules-panel[data-panel="projects"],
.cn-modules-shell:has(input[value="operations"]:checked) .cn-modules-panel[data-panel="operations"],
.cn-modules-shell:has(input[value="workforce"]:checked)  .cn-modules-panel[data-panel="workforce"],
.cn-modules-shell:has(input[value="finance"]:checked)    .cn-modules-panel[data-panel="finance"] {
  display: flex;
}

.cn-modules-crumb { font-size: 14px; color: var(--ink-muted); margin: 0 0 var(--spacing-8); }
.cn-modules-crumb i { padding: 0 6px; font-style: normal; }

/* Generic row: contact / quote / order / ledger / roster */
.cn-modules-row { display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-16); padding: var(--spacing-12) 0; border-bottom: 1px solid var(--line); }
.cn-modules-row:last-child { border-bottom: 0; }
.cn-modules-row-main { display: flex; flex-direction: column; gap: 2px; }
.cn-modules-row-main b { font-size: var(--text-body); font-weight: 500; color: var(--ink); }
.cn-modules-row-main span { font-size: 14px; color: var(--ink-body); }

.cn-modules-row-main--avatar { flex-direction: row; align-items: center; gap: var(--spacing-12); }
.cn-modules-row-main--avatar > span:last-child { display: flex; flex-direction: column; gap: 2px; }
.cn-modules-avatar {
  flex: 0 0 auto;
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--base-alt);
  color: var(--ink);
  font-size: 14px; font-weight: 500;
}

.cn-modules-chip {
  flex: 0 0 auto;
  font-size: 14px; font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-buttons);
  background: var(--base-alt);
  color: var(--ink);
}
.cn-modules-chip--muted { background: var(--base); color: var(--ink-body); }
.cn-modules-chip--peach { background: var(--color-blush-peach); color: var(--color-sienna-brown); }

/* Functional data colour inside the depicted screen: a flagged row warms up, not just its chip */
.cn-modules-row:has(.cn-modules-chip--peach) {
  background: var(--color-blush-peach);
  border-radius: var(--radius-inputs);
  padding-inline: var(--spacing-12);
  margin-inline: calc(-1 * var(--spacing-12));
  border-bottom: 0;
}
.cn-modules-row:has(.cn-modules-chip--peach) .cn-modules-row-main b,
.cn-modules-row:has(.cn-modules-chip--peach) .cn-modules-row-main span { color: var(--color-sienna-brown); }
.cn-modules-row:has(.cn-modules-chip--peach) .cn-modules-chip--peach { background: var(--color-sienna-brown); color: var(--color-paper-white); }

/* Inventory: stock level bars */
.cn-modules-stock { display: flex; flex-direction: column; gap: var(--spacing-16); }
.cn-modules-stock-row { display: grid; grid-template-columns: 148px 1fr 72px; align-items: center; gap: var(--spacing-12); }
.cn-modules-stock-name { display: flex; flex-direction: column; gap: 2px; font-size: var(--text-body); color: var(--ink); }
.cn-modules-stock-name small { font-size: 14px; font-weight: 400; color: var(--ink-muted); }
.cn-modules-stock-bar { height: 6px; border-radius: var(--r-bar); background: var(--line); overflow: hidden; }
.cn-modules-stock-bar i { display: block; height: 100%; width: var(--v, 40%); background: var(--ink); border-radius: var(--r-bar); }
.cn-modules-stock-qty { justify-self: end; font-size: 14px; font-weight: 500; color: var(--ink-body); }
.cn-modules-stock-qty--low { background: var(--color-blush-peach); color: var(--color-sienna-brown); padding: 3px 10px; border-radius: var(--radius-buttons); }
.cn-modules-stock-row:has(.cn-modules-stock-qty--low) .cn-modules-stock-bar i { background: var(--color-sienna-brown); }

/* Projects: checklist */
.cn-modules-checklist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--spacing-16); }
.cn-modules-checklist li { position: relative; padding-left: 28px; font-size: var(--text-body); color: var(--ink-body); }
.cn-modules-checklist li::before {
  content: ""; position: absolute; left: 0; top: 3px;
  width: 16px; height: 16px; border-radius: 50%;
  border: 1.5px solid var(--line);
}
.cn-modules-checklist li.is-done { color: var(--ink); }
.cn-modules-checklist li.is-done::before { background: var(--ink); border-color: var(--ink); }
.cn-modules-checklist li.is-active { color: var(--ink); font-weight: 500; }
.cn-modules-checklist li.is-active::before { border-color: var(--ink); }

/* Operations: stage tracker */
.cn-modules-stages { list-style: none; display: flex; margin: 0; padding: var(--spacing-16) 0 0; }
.cn-modules-stages li { flex: 1 1 0; position: relative; padding-top: 18px; font-size: 14px; color: var(--ink-muted); text-align: center; }
.cn-modules-stages li::before {
  content: ""; position: absolute; top: 5px; left: 50%;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--line); transform: translateX(-50%); z-index: 1;
}
.cn-modules-stages li::after {
  content: ""; position: absolute; top: 8px; left: calc(-50% + 8px); right: calc(50% + 8px);
  height: 1px; background: var(--line);
}
.cn-modules-stages li:first-child::after { display: none; }
.cn-modules-stages li.is-done::before, .cn-modules-stages li.is-current::before { background: var(--ink); }
.cn-modules-stages li.is-done::after { background: var(--ink); }
.cn-modules-stages li.is-done, .cn-modules-stages li.is-current { color: var(--ink); font-weight: 500; }

/* Finance: a small sienna/peach gauge — real chromatic data inside the artifact */
.cn-modules-finance-gauge { display: flex; align-items: center; gap: var(--spacing-16); padding-bottom: var(--spacing-12); border-bottom: 1px solid var(--color-mist-gray); }
.cn-modules-ring {
  position: relative;
  flex: 0 0 auto;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: conic-gradient(var(--color-sienna-brown) var(--v, 50%), var(--color-blush-peach) 0);
}
.cn-modules-ring::before { content: ""; position: absolute; inset: 6px; background: var(--color-paper-white); border-radius: 50%; }
.cn-modules-ring b { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; font-size: var(--text-body); font-weight: 500; color: var(--color-sienna-brown); }
.cn-modules-finance-gauge-copy { display: flex; flex-direction: column; gap: 2px; }
.cn-modules-finance-gauge-copy b { font-size: var(--text-body); font-weight: 500; color: var(--color-ink-black); }
.cn-modules-finance-gauge-copy span { font-size: 14px; color: var(--color-slate-gray); }

/* Sticky companion strip beneath the frame — keeps the right column active, not stranded */
.cn-modules-visual-foot {
  margin: 0;
  padding: var(--spacing-16) var(--spacing-20);
  background: var(--base-alt);
  border-radius: var(--radius-cards);
  font-size: var(--text-body);
  color: var(--ink-body);
}
.cn-modules-visual-foot b { color: var(--ink); font-weight: 500; }

/* ---------------------------------------------------------------
   Responsive
--------------------------------------------------------------- */
@media (min-width: 1240px) {
  .cn-chain-mark { display: block; }
}

@media (max-width: 1080px) {
  .cn-frag-inner { grid-template-columns: 1fr; gap: var(--spacing-40); }
  .cn-frag-scatter { min-height: 320px; }

  .cn-chain-body { grid-template-columns: 1fr; gap: var(--spacing-40); }
  .cn-chain-record { position: static; }

  .cn-modules-grid { grid-template-columns: 1fr; gap: var(--spacing-32); }
  .cn-modules-visual { position: static; top: auto; }
  .cn-modules-frame { min-height: 300px; }
}

@media (max-width: 720px) {
  .cn-frag-scatter { position: static; min-height: 0; display: flex; flex-direction: column; gap: var(--spacing-12); }
  .cn-frag-chip { position: static; width: 100%; transform: none !important; }

  .cn-frag-heading, .cn-chain-heading, .cn-pillars-heading, .cn-modules-heading {
    font-size: 34px;
    letter-spacing: -0.02em;
  }

  .cn-chain-record { padding: var(--spacing-24) var(--spacing-20); }
  .cn-chain-rail-line { left: 14px; }
  .cn-chain-stop { gap: var(--spacing-12); padding: var(--spacing-16) 0; }
  .cn-chain-stop-num { flex-basis: 28px; }

  .cn-pillars-grid { grid-template-columns: 1fr; }

  .cn-modules-stock-row { grid-template-columns: 108px 1fr 60px; }
}

@media (prefers-reduced-motion: reduce) {
  .cn-modules-item { transition: none; }
  .cn-chain-rail-line i { animation: none !important; transform: scaleY(1); }
}