/* Perimeter One shared site styles. Loaded by index.html and about.html. */
  :root {
    --ink: #24282a;
    --ink-soft: #55605f;
    --paper: #f5f7f7;
    --panel: #ffffff;
    --line: #d9e0e0;
    --line-hard: #b9c4c4;
    --orange: #ea7024;
    --orange-ink: #ad4308;
    --teal: #327382;
    --teal-soft: rgba(83, 150, 165, 0.12);
    --band: #1b2023;
    --band-ink: #e9edee;
    --band-soft: #9fabab;
    --logo-plate: transparent;
    --canvas-node: #55605f;
    --canvas-link: rgba(85, 96, 95, 0.28);
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --ink: #e9edee;
      --ink-soft: #98a4a4;
      --paper: #15191b;
      --panel: #1d2225;
      --line: #2c3336;
      --line-hard: #3b4448;
      --orange: #f07f36;
      --orange-ink: #f28a46;
      --teal: #6cabb9;
      --teal-soft: rgba(108, 171, 185, 0.14);
      --band: #101416;
      --band-ink: #e9edee;
      --band-soft: #8b9797;
      --logo-plate: #ffffff;
      --canvas-node: #98a4a4;
      --canvas-link: rgba(152, 164, 164, 0.25);
    }
  }
  :root[data-theme="dark"] {
    --ink: #e9edee;
    --ink-soft: #98a4a4;
    --paper: #15191b;
    --panel: #1d2225;
    --line: #2c3336;
    --line-hard: #3b4448;
    --orange: #f07f36;
    --orange-ink: #f28a46;
    --teal: #6cabb9;
    --teal-soft: rgba(108, 171, 185, 0.14);
    --band: #101416;
    --band-ink: #e9edee;
    --band-soft: #8b9797;
    --logo-plate: #ffffff;
    --canvas-node: #98a4a4;
    --canvas-link: rgba(152, 164, 164, 0.25);
  }
  :root[data-theme="light"] {
    --ink: #24282a;
    --ink-soft: #55605f;
    --paper: #f5f7f7;
    --panel: #ffffff;
    --line: #d9e0e0;
    --line-hard: #b9c4c4;
    --orange: #ea7024;
    --orange-ink: #ad4308;
    --teal: #327382;
    --teal-soft: rgba(83, 150, 165, 0.12);
    --band: #1b2023;
    --band-ink: #e9edee;
    --band-soft: #9fabab;
    --logo-plate: transparent;
    --canvas-node: #55605f;
    --canvas-link: rgba(85, 96, 95, 0.28);
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  [id] { scroll-margin-top: 80px; }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { animation: none !important; transition: none !important; }
  }
  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  .disp {
    font-family: "Avenir Next Condensed", "HelveticaNeue-CondensedBold", "Arial Narrow", "Roboto Condensed", "Liberation Sans Narrow", sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.01em;
    line-height: 1.02;
    text-wrap: balance;
  }
  .mono {
    font-family: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }
  a { color: var(--teal); text-decoration: none; }
  a:hover { text-decoration: underline; }
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--orange);
    outline-offset: 3px;
  }
  img { max-width: 100%; }

  .wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px; }

  /* ---------- header ---------- */
  header {
    position: sticky; top: 0; z-index: 50;
    background: var(--paper);
    border-bottom: 1px solid var(--line-hard);
  }
  .nav {
    display: flex; align-items: center; gap: 28px;
    height: 64px;
  }
  .nav .logo img {
    height: 30px; width: auto; display: block;
    background: var(--logo-plate, transparent);
    padding: 3px 7px;
    box-sizing: content-box;
  }
  .nav nav { margin-left: auto; display: flex; gap: 24px; align-items: center; }
  .nav nav a { color: var(--ink-soft); font-size: 14px; font-weight: 600; }
  .nav nav a:hover { color: var(--ink); text-decoration: none; }
  .nav nav a.current { color: var(--orange); }
  @media (max-width: 720px) {
    .wrap { padding-left: 14px; padding-right: 14px; }
    .nav { gap: 12px; }
    .nav .logo img { height: 24px; padding-left: 0; padding-right: 0; }
    .nav nav { gap: 10px; }
    .nav nav a:not(.btn):not([href="/blog/"]) { display: none; }
    .nav .btn { padding: 9px 12px; font-size: 13px; }
  }

  .btn {
    display: inline-block;
    background: var(--orange);
    color: #101416 !important;
    font-weight: 700;
    font-size: 14px;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
  }
  .btn:hover { text-decoration: none; filter: brightness(0.94); }
  .btn.ghost {
    background: transparent;
    color: var(--ink) !important;
    box-shadow: inset 0 0 0 1px var(--line-hard);
  }
  .btn.ghost:hover { box-shadow: inset 0 0 0 1px var(--ink-soft); filter: none; }

  /* ---------- zone chrome: every section is a labeled segment ---------- */
  .zone { border-bottom: 1px solid var(--line-hard); position: relative; }
  .zone > .wrap { padding-top: 72px; padding-bottom: 80px; }
  .zone-tag {
    display: inline-flex; align-items: center; gap: 8px;
    color: var(--teal);
    margin-bottom: 22px;
  }
  .zone-tag::before {
    content: "";
    width: 22px; height: 1px;
    background: var(--orange);
  }
  .zone h2 { font-size: clamp(32px, 4.5vw, 46px); margin: 0 0 14px; }
  .zone .page-title { font-size: clamp(40px, 6vw, 64px); line-height: 1.02; margin: 0 0 18px; }
  .zone .lede { max-width: 62ch; color: var(--ink-soft); font-size: 18px; margin: 0 0 40px; }

  /* ---------- hero ---------- */
  .hero > .wrap {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
    padding-top: 80px; padding-bottom: 88px;
  }
  @media (max-width: 880px) {
    .hero > .wrap { grid-template-columns: 1fr; padding-top: 56px; }
  }
  .hero h1 {
    font-size: clamp(52px, 7.5vw, 92px);
    margin: 0 0 22px;
  }
  .hero h1 .cut { color: var(--orange); }
  .hero p.sub { font-size: 19px; color: var(--ink-soft); max-width: 54ch; margin: 0 0 34px; }
  .hero .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
  .hero .btn { padding: 14px 26px; font-size: 15px; }
  .hero-viz { position: relative; }
  .hero-viz canvas {
    width: 100%; height: auto; display: block;
    border: 1px solid var(--line);
    background: var(--panel);
  }
  .hero-viz .viz-caption {
    margin-top: 10px;
    color: var(--ink-soft);
    display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  }
  .hero-viz .viz-caption .live { color: var(--orange-ink); }

  /* ---------- capability strip ---------- */
  .strip { border-bottom: 1px solid var(--line-hard); background: var(--panel); }
  .strip .wrap {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  @media (max-width: 880px) { .strip .wrap { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 520px) { .strip .wrap { grid-template-columns: 1fr; } }
  .strip .cell {
    padding: 26px 24px;
    border-left: 1px solid var(--line);
  }
  .strip .cell:first-child { border-left: none; padding-left: 0; }
  @media (max-width: 880px) {
    .strip .cell { border-left: none; border-top: 1px solid var(--line); padding-left: 0; }
    .strip .cell:nth-child(-n+2) { border-top: none; }
  }
  @media (max-width: 520px) { .strip .cell:nth-child(2) { border-top: 1px solid var(--line); } }
  .strip .cell .mono { color: var(--teal); display: block; margin-bottom: 6px; }
  .strip .cell strong { display: block; font-size: 16px; margin-bottom: 4px; }
  .strip .cell span { color: var(--ink-soft); font-size: 14px; line-height: 1.5; }

  /* ---------- conversions ---------- */
  .pipeline {
    counter-reset: step;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    border: 1px solid var(--line-hard);
    background: var(--panel);
  }
  @media (max-width: 880px) { .pipeline { grid-template-columns: 1fr; } }
  .step {
    counter-increment: step;
    padding: 24px 22px 26px;
    border-left: 1px solid var(--line);
    position: relative;
  }
  .step:first-child { border-left: none; }
  @media (max-width: 880px) {
    .step { border-left: none; border-top: 1px solid var(--line); }
    .step:first-child { border-top: none; }
  }
  .step::before {
    content: "0" counter(step);
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 12px;
    letter-spacing: 0.12em;
    color: var(--orange-ink);
    display: block;
    margin-bottom: 14px;
  }
  .step strong { display: block; font-size: 16px; margin-bottom: 8px; }
  .step p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.55; }
  .conv-note {
    margin-top: 28px;
    padding: 18px 22px;
    border-left: 3px solid var(--orange);
    background: var(--teal-soft);
    max-width: 72ch;
  }
  .conv-note p { margin: 0; font-size: 15px; color: var(--ink); }

  /* ---------- services rails ---------- */
  .rails {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .rail {
    background: var(--panel);
    border: 1px solid var(--line-hard);
    border-top: 3px solid var(--teal);
    padding: 30px 30px 12px;
  }
  .rail.pro { border-top-color: var(--orange); }
  .rail h3 { font-size: 26px; margin: 0 0 6px; }
  .rail > p { color: var(--ink-soft); font-size: 15px; margin: 0 0 18px; }
  .rail ul { list-style: none; margin: 0; padding: 0; }
  .rail li {
    padding: 14px 0 14px 24px;
    border-top: 1px solid var(--line);
    font-size: 15px;
    position: relative;
  }
  .rail li::before {
    content: "▸";
    color: var(--teal);
    font-size: 13px;
    position: absolute;
    left: 4px;
    top: 16px;
  }
  .rail.pro li::before { color: var(--orange-ink); }
  .rail li b { font-weight: 600; }
  .rail li span { color: var(--ink-soft); }

  /* ---------- platforms ---------- */
  .plat-grid { display: flex; flex-wrap: wrap; gap: 10px; max-width: 900px; }
  .chip {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 13px;
    padding: 8px 14px;
    border: 1px solid var(--line-hard);
    background: var(--panel);
    color: var(--ink);
  }
  .plat-note { color: var(--ink-soft); font-size: 15px; max-width: 62ch; margin-top: 24px; }

  /* ---------- fractional leadership ---------- */
  .lead-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  @media (max-width: 1080px) { .lead-grid { grid-template-columns: 1fr; } }
  .lead-note { color: var(--ink-soft); font-size: 15px; max-width: 70ch; margin-top: 28px; }

  /* ---------- why ---------- */
  .why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
  @media (max-width: 880px) { .why-grid { grid-template-columns: 1fr; } }
  .why-grid article h3 { font-size: 21px; margin: 0 0 8px; }
  .why-grid article p { margin: 0; color: var(--ink-soft); font-size: 15px; }

  /* FAQ */
  .faq { display: grid; gap: 0; border-top: 1px solid var(--line-hard); max-width: 860px; }
  .faq-item { border-bottom: 1px solid var(--line-hard); padding: 6px 0; }
  .faq-item summary { list-style: none; cursor: pointer; padding: 16px 40px 16px 0; position: relative; }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary h3 { display: inline; font-size: 18px; margin: 0; font-weight: 700; }
  .faq-item summary::after {
    content: "+"; position: absolute; right: 4px; top: 12px; font-size: 24px; color: var(--teal); line-height: 1;
  }
  .faq-item[open] summary::after { content: "–"; }
  .faq-item p { margin: 0 0 18px; color: var(--ink-soft); font-size: 15.5px; line-height: 1.65; max-width: 72ch; }

  /* Who we are */
  .people { display: grid; gap: 28px; }
  .person {
    display: grid; grid-template-columns: 168px 1fr; gap: 32px; align-items: start;
    background: var(--panel); border: 1px solid var(--line-hard); padding: 32px;
  }
  @media (max-width: 720px) { .person { grid-template-columns: 1fr; gap: 20px; padding: 24px; } }
  .person .mark {
    aspect-ratio: 1 / 1; display: grid; place-items: center;
    background: var(--band); color: var(--band-ink); border: 1px solid var(--line-hard);
    font-size: 44px; letter-spacing: 0.04em; position: relative;
  }
  .person .mark::after {
    content: ""; position: absolute; left: 14px; right: 14px; bottom: 14px; height: 3px; background: var(--orange);
  }
  @media (max-width: 720px) { .person .mark { width: 120px; font-size: 32px; } }
  .person h3 { font-size: 26px; margin: 0 0 4px; }
  .person .role { color: var(--teal); font-size: 14px; display: block; margin-bottom: 18px; }
  .person p { margin: 0 0 14px; color: var(--ink-soft); font-size: 15.5px; line-height: 1.6; max-width: 70ch; }
  .person p:last-of-type { margin-bottom: 20px; }
  .person .creds { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
  .person .creds .chip { font-size: 13px; }
  .person .links a { font-size: 14px; font-weight: 600; margin-right: 18px; }

  /* ---------- CTA band + footer (committed dark, both themes) ---------- */
  .band {
    background: var(--band);
    color: var(--band-ink);
  }
  .band .wrap { padding: 76px 28px; display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
  @media (max-width: 720px) { .band .wrap { grid-template-columns: 1fr; } }
  .band h2 { font-size: clamp(34px, 5vw, 54px); margin: 0 0 12px; }
  .band p { color: var(--band-soft); margin: 0; max-width: 52ch; }
  .band .btn { padding: 16px 30px; font-size: 15px; white-space: nowrap; }
  footer { background: var(--band); border-top: 1px solid #2c3336; }
  footer .wrap {
    padding: 30px 28px;
    display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  }
  footer img {
    height: 24px; width: auto; display: block;
    background: #ffffff;
    padding: 3px 7px;
    box-sizing: content-box;
  }
  footer .mono { color: var(--band-soft); margin-left: auto; }