:root{
    --label:#1d1d1f;
    --label-secondary:#6e6e73;
    --label-tertiary:#86868b;
    --separator:#d2d2d7;
    --separator-thin:rgba(0,0,0,0.08);
    --surface:#ffffff;
    --surface-secondary:#f5f5f7;
    --surface-tertiary:#fbfbfd;
    --accent:#0066cc;
    --accent-hover:#004499;
    --pos:#1d8348;
    --neg:#c0392b;
    --warn:#b7791f;
    --radius-card:14px;
    --radius-pill:980px;
    --shadow-card:0 0 0 0.5px rgba(0,0,0,0.04),0 1px 2px rgba(0,0,0,0.04);
    --nav-bg:rgba(255,255,255,0.72);
  }
  @media (prefers-color-scheme:dark){
    :root{
      --label:#f5f5f7;
      --label-secondary:#a1a1a6;
      --label-tertiary:#6e6e73;
      --separator:#424245;
      --separator-thin:rgba(255,255,255,0.08);
      --surface:#000000;
      --surface-secondary:#1c1c1e;
      --surface-tertiary:#2c2c2e;
      --accent:#2997ff;
      --accent-hover:#5cb0ff;
      --pos:#30d158;
      --neg:#ff453a;
      --warn:#ff9f0a;
      --shadow-card:0 0 0 0.5px rgba(255,255,255,0.06);
      --nav-bg:rgba(0,0,0,0.72);
    }
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth;scroll-padding-top:80px}
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{animation-duration:0.01ms !important;transition-duration:0.01ms !important}
  }
  html,body{margin:0;padding:0;background:var(--surface);color:var(--label);
    font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Inter","Hiragino Sans","Yu Gothic UI","PingFang SC",system-ui,sans-serif;
    font-size:17px;line-height:1.47059;letter-spacing:-0.022em;
    -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
    font-feature-settings:"ss01" 1,"cv11" 1}
  a{color:var(--accent);text-decoration:none;transition:color 0.18s ease}
  a:hover{color:var(--accent-hover);text-decoration:underline;text-underline-offset:2px}
  a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px;text-decoration:none}

  /* STICKY NAV */
  .navbar{position:sticky;top:0;z-index:100;
    background:var(--nav-bg);
    -webkit-backdrop-filter:saturate(180%) blur(20px);
    backdrop-filter:saturate(180%) blur(20px);
    border-bottom:0.5px solid var(--separator)}
  .navbar-inner{max-width:1080px;margin:0 auto;padding:14px 22px;
    display:flex;gap:24px;align-items:center;font-size:14px}
  .navbar .brand{font-weight:600;color:var(--label);letter-spacing:-0.012em;
    white-space:nowrap;font-size:14px;flex-shrink:0}
  .navbar .brand .dot{display:inline-block;width:6px;height:6px;border-radius:50%;
    background:var(--accent);margin-right:8px;vertical-align:middle}
  .navbar nav{display:flex;gap:24px;flex-wrap:nowrap;overflow-x:auto;
    scrollbar-width:none;flex:1}
  .navbar nav::-webkit-scrollbar{display:none}
  .navbar nav a{color:var(--label-secondary);text-decoration:none;
    white-space:nowrap;font-size:13px;font-weight:400;padding:4px 0;
    border-bottom:1.5px solid transparent;transition:color 0.18s ease,border-color 0.18s ease}
  .navbar nav a:hover{color:var(--label);text-decoration:none}
  .navbar nav a.is-active{color:var(--label);border-bottom-color:var(--accent)}

  .container{max-width:1080px;margin:0 auto;padding:64px 22px 96px}

  /* HERO */
  header{padding:48px 0 56px;border-bottom:none;margin-bottom:0}
  .eyebrow{color:var(--accent);font-weight:600;font-size:12px;
    letter-spacing:0.06em;text-transform:uppercase;margin-bottom:18px}
  h1{font-size:clamp(40px,5.5vw,56px);color:var(--label);margin:0 0 18px;
    font-weight:600;letter-spacing:-0.022em;line-height:1.07143;max-width:22ch}
  .lede{font-size:21px;line-height:1.381;color:var(--label-secondary);
    font-weight:400;letter-spacing:-0.011em;max-width:62ch;margin:0 0 24px}

  /* MANDATE — Apple-style pull quote */
  .mandate{font-size:24px;line-height:1.33;font-weight:400;font-style:italic;
    color:var(--label);letter-spacing:-0.012em;max-width:38ch;
    margin:32px 0 8px;padding:16px 0 16px 18px;
    background:none;border-left:2px solid var(--separator);border-radius:0}
  .meta{color:var(--label-tertiary);font-size:13px;margin-top:14px}
  .meta b{color:var(--label)}

  /* KPI tiles — bordered grid */
  .kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
    gap:1px;background:var(--separator);border:0.5px solid var(--separator);
    border-radius:var(--radius-card);overflow:hidden;margin-top:36px}
  .kpi{background:var(--surface);padding:22px;border:none;border-radius:0;text-align:left}
  .kpi b{display:block;font-size:32px;color:var(--label);font-weight:600;
    line-height:1.05;letter-spacing:-0.022em;font-feature-settings:"tnum" 1}
  .kpi span{display:block;color:var(--label-secondary);font-size:13px;
    font-weight:400;text-transform:none;letter-spacing:0;margin-top:8px}

  /* Hide old top TOC — replaced by sticky nav */
  .toc{display:none}

  /* SECTIONS */
  section{padding:96px 0 0;scroll-margin-top:80px;
    opacity:0;transform:translateY(8px);
    transition:opacity 0.6s ease,transform 0.6s ease}
  section.in-view{opacity:1;transform:translateY(0)}
  @media (prefers-reduced-motion:reduce){
    section{opacity:1;transform:none}
  }
  .section-head{display:block;margin:0 0 28px;border:none;padding-bottom:0}
  .section-num{display:none}
  h2{font-size:clamp(28px,3.5vw,40px);color:var(--label);margin:0 0 10px;
    font-weight:600;letter-spacing:-0.018em;line-height:1.1}
  .section-sub{color:var(--label-secondary);font-size:17px;margin-left:0;
    display:block;margin-top:8px;font-weight:400;letter-spacing:-0.011em}
  .section-intro{color:var(--label-secondary);max-width:62ch;
    margin:18px 0 32px;font-size:17px;line-height:1.5}
  .section-intro em{color:var(--label);font-style:normal;font-weight:500}

  /* PERSONAS — single tonal family */
  .personas{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
  .persona{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:0;overflow:hidden;border:none;display:flex;flex-direction:column;
    box-shadow:none}
  .persona-top{padding:24px 24px 20px;background:none !important;
    color:var(--label);display:flex;gap:14px;align-items:center;
    border-bottom:0.5px solid var(--separator)}
  .avatar{width:48px;height:48px;border-radius:50%;background:var(--surface-tertiary);
    flex-shrink:0;border:none;overflow:hidden}
  .avatar img{width:100%;height:100%;display:block}
  .persona-id{flex:1}
  .persona-id .seg{font-size:11px;font-weight:600;letter-spacing:0.06em;
    opacity:1;color:var(--label-tertiary);text-transform:uppercase}
  .persona-id .name{font-size:17px;font-weight:600;margin:2px 0 0;color:var(--label);
    letter-spacing:-0.012em}
  .persona-id .arc{font-size:13px;color:var(--label-secondary);margin-top:2px}
  .persona-body{padding:20px 24px 24px;flex:1;display:flex;
    flex-direction:column;gap:14px}
  .persona-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;font-size:13px}
  .stat{background:none;border-radius:0;padding:0}
  .stat b{display:block;color:var(--label-tertiary);font-weight:500;font-size:11px;
    text-transform:uppercase;letter-spacing:0.04em;margin-bottom:2px}
  .quote{background:none;border-left:none;padding:0;font-style:italic;
    color:var(--label);font-size:15px;line-height:1.5;border-radius:0}
  .persona-body h4{margin:8px 0 4px;color:var(--label-tertiary);font-size:11px;
    text-transform:uppercase;letter-spacing:0.06em;font-weight:600}
  .persona-body ul{margin:0;padding-left:18px;font-size:14px;color:var(--label)}
  .persona-body ul li{margin-bottom:4px}
  .play-tag{display:inline-block;font-size:11px;font-weight:600;letter-spacing:0.04em;
    padding:6px 12px;border-radius:var(--radius-pill);text-transform:uppercase;
    margin-top:6px;background:var(--surface);border:0.5px solid var(--separator)}
  .play-tag.win{color:var(--pos)}
  .play-tag.defend{color:var(--warn)}
  .play-tag.concede{color:var(--label-tertiary)}

  /* SURVEY — quiet stat cards */
  .stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
    gap:1px;background:var(--separator);border:0.5px solid var(--separator);
    border-radius:var(--radius-card);overflow:hidden;margin-bottom:32px}
  .stat-card{background:var(--surface);border:none;border-radius:0;padding:24px}
  .stat-card .num{font-size:32px;font-weight:600;color:var(--label);line-height:1.05;
    letter-spacing:-0.022em;font-feature-settings:"tnum" 1}
  .stat-card .lbl{font-size:14px;color:var(--label);font-weight:500;margin-top:8px}
  .stat-card .sub{font-size:13px;color:var(--label-secondary);margin-top:4px}

  .charts{display:grid;grid-template-columns:repeat(auto-fit,minmax(440px,1fr));
    gap:20px;margin-top:24px}
  .chart{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:18px;border:none}
  .chart img{width:100%;max-width:640px;height:auto;display:block;
    border-radius:8px;margin:0 auto}
  .chart .cap{font-size:14px;color:var(--label);font-weight:600;margin-top:14px;
    letter-spacing:-0.011em}
  .chart .takeaway{font-size:14px;color:var(--label-secondary);margin-top:6px;line-height:1.5}

  .surprises{margin-top:40px;background:var(--surface-secondary);
    border-radius:var(--radius-card);padding:28px 32px;border:none}
  .surprises h3{margin:0 0 16px;color:var(--label);font-size:20px;font-weight:600;
    letter-spacing:-0.012em}
  .surprises ol{margin:0;padding-left:22px}
  .surprises li{margin-bottom:12px;font-size:15px;color:var(--label);line-height:1.5}
  .surprises b{font-weight:600}

  /* PRODUCTS & CROSS-SELL */
  .prod-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));
    gap:18px;margin-top:24px}
  .prod-card{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:24px;border:none}
  .prod-card h4{margin:0 0 6px;color:var(--label);font-size:17px;font-weight:600;
    letter-spacing:-0.012em}
  .prod-card .h-sub{font-size:13px;color:var(--label-secondary);margin-bottom:18px}
  .prod-bars{display:flex;flex-direction:column;gap:10px}
  .prod-bar{display:grid;grid-template-columns:140px 1fr 56px;align-items:center;
    gap:12px;font-size:13px}
  .prod-bar .lab{color:var(--label);font-weight:400}
  .prod-bar .track{background:var(--surface-tertiary);border-radius:999px;height:6px;overflow:hidden}
  .prod-bar .fill{background:var(--label);height:100%;border-radius:999px}
  .prod-bar.alt .fill{background:var(--accent)}
  .prod-bar.warn .fill{background:var(--label-tertiary)}
  .prod-bar .pct{font-weight:600;color:var(--label);text-align:right;
    font-size:13px;font-feature-settings:"tnum" 1}
  .prod-card .insight{margin-top:18px;padding-top:14px;
    border-top:0.5px solid var(--separator);
    font-size:14px;color:var(--label-secondary);font-style:normal;line-height:1.5}
  .pair-table{width:100%;border-collapse:collapse;font-size:14px}
  .pair-table th,.pair-table td{padding:10px 12px;
    border-bottom:0.5px solid var(--separator);text-align:left}
  .pair-table th{background:none;color:var(--label-tertiary);font-weight:500;
    font-size:11px;text-transform:uppercase;letter-spacing:0.04em}
  .pair-table td{color:var(--label)}
  .pair-table td.pct{font-weight:600;color:var(--label);text-align:right;
    font-feature-settings:"tnum" 1}
  .pair-table td.rank{color:var(--label-tertiary);width:28px;font-size:12px}
  .condi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));
    gap:14px;margin-top:18px}
  .condi{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:20px;border:none;border-left:none}
  .condi h5{margin:0 0 4px;color:var(--label);font-size:15px;font-weight:600;
    letter-spacing:-0.012em}
  .condi .anchor{color:var(--label-tertiary);font-size:12px;font-weight:500;
    display:block;margin-bottom:12px}
  .condi ul{margin:0;padding-left:18px;font-size:14px;color:var(--label)}
  .condi li{margin-bottom:4px}
  .condi b{color:var(--label);font-weight:600}
  .xs-take{margin-top:32px;background:var(--surface-secondary);
    border-radius:var(--radius-card);padding:28px 32px;border:none;border-left:none}
  .xs-take h3{margin:0 0 14px;color:var(--label);font-size:20px;font-weight:600;
    letter-spacing:-0.012em}
  .xs-take ol{margin:0;padding-left:22px;font-size:15px;color:var(--label)}
  .xs-take li{margin-bottom:10px;line-height:1.5}

  /* OPPORTUNITY */
  .opps{display:grid;grid-template-columns:repeat(auto-fit,minmax(310px,1fr));gap:16px}
  .opp{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:24px;border:none;border-top:none;position:relative}
  .opp .num{position:absolute;top:18px;right:18px;background:none;
    color:var(--label-tertiary);width:auto;height:auto;border-radius:0;
    font-weight:500;font-size:13px;font-feature-settings:"tnum" 1}
  .opp h3{margin:0 0 10px;color:var(--label);font-size:17px;font-weight:600;
    padding-right:36px;letter-spacing:-0.012em}
  .opp p{margin:0 0 12px;font-size:14px;color:var(--label-secondary);line-height:1.5}
  .feas{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
  .feas span{font-size:11px;font-weight:500;padding:4px 10px;
    border-radius:var(--radius-pill);border:0.5px solid var(--separator);
    background:var(--surface)}
  .feas .yes{color:var(--pos)}
  .feas .maybe{color:var(--warn)}
  .feas .no{color:var(--neg)}
  .dropped{margin-top:28px;background:var(--surface-secondary);
    border-radius:var(--radius-card);padding:24px 28px;border-left:none}
  .dropped h3{margin:0 0 10px;color:var(--neg);font-size:17px;font-weight:600;
    letter-spacing:-0.012em}
  .dropped ul{margin:0;padding-left:22px;font-size:14px;color:var(--label)}
  .dropped li{margin-bottom:6px;line-height:1.5}

  /* STRATEGY */
  .views{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:16px;margin-bottom:28px}
  .view{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:22px;border:none;border-top:none}
  .view .vnum{display:inline-block;width:auto;height:auto;background:none;
    color:var(--label-tertiary);text-align:left;line-height:1;font-size:12px;
    font-weight:500;margin-right:8px;border-radius:0}
  .view h4{margin:0 0 10px;color:var(--label);font-size:16px;font-weight:600;
    display:flex;align-items:center;letter-spacing:-0.012em}
  .view ul{margin:0;padding-left:18px;font-size:14px;color:var(--label)}
  .view li{margin-bottom:4px;line-height:1.5}
  .decisions{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:16px;margin-top:24px}
  .decision{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:24px;border:none}
  .decision h4{margin:0 0 12px;color:var(--label);font-size:17px;font-weight:600;
    letter-spacing:-0.012em}
  .decision .lbl{font-size:11px;font-weight:600;letter-spacing:0.06em;
    text-transform:uppercase;color:var(--label-tertiary);margin-bottom:4px}
  .decision ul{margin:8px 0 0;padding-left:20px;font-size:14px;color:var(--label)}
  .decision li{margin-bottom:4px;line-height:1.5}
  .timeline{margin-top:32px;background:var(--surface-secondary);
    border-radius:var(--radius-card);padding:28px;border:none}
  .timeline h3{margin:0 0 18px;color:var(--label);font-size:17px;font-weight:600;
    letter-spacing:-0.012em}
  .quarters{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
  .quarter{background:var(--surface);border-radius:12px;padding:18px;
    border:0.5px solid var(--separator);border-top:none}
  .quarter h5{margin:0 0 10px;color:var(--label);font-size:13px;font-weight:600;
    text-transform:uppercase;letter-spacing:0.04em}
  .quarter ul{margin:0;padding-left:16px;font-size:13px;color:var(--label)}
  .quarter li{margin-bottom:3px;line-height:1.5}

  /* UX */
  .ux-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
  .ux{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:22px;border:none;border-left:none;display:flex;gap:14px;align-items:flex-start}
  .ux .icon{font-size:22px;flex-shrink:0;filter:grayscale(0.6) opacity(0.85)}
  .ux h4{margin:0 0 6px;color:var(--label);font-size:15px;font-weight:600;
    letter-spacing:-0.012em}
  .ux p{margin:0;font-size:14px;color:var(--label-secondary);line-height:1.5}
  .ux p em{color:var(--label);font-style:italic}
  .reminders{margin-top:32px;background:var(--surface-secondary);
    border-radius:var(--radius-card);padding:28px 32px;border-left:none}
  .reminders h3{margin:0 0 14px;color:var(--label);font-size:17px;font-weight:600;
    letter-spacing:-0.012em}
  .reminders ul{padding-left:22px}
  .reminders li{margin-bottom:10px;font-size:15px;color:var(--label);line-height:1.5}
  .reminders b{font-weight:600}

  /* DESIGN DETAILS (17) */
  .dd-subhead{margin:48px 0 20px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
  .dd-subhead h3{margin:0;color:var(--label);font-size:24px;font-weight:600;
    letter-spacing:-0.012em}
  .dd-subhead .cnt{font-size:13px;font-weight:400;letter-spacing:0;text-transform:none;
    color:var(--label-secondary)}
  .dd-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px}
  .dd{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:20px 22px;border:none;border-left:none;display:flex;flex-direction:column;gap:10px}
  .dd.p3{box-shadow:inset 3px 0 0 var(--neg)}
  .dd.p2{box-shadow:inset 3px 0 0 var(--warn)}
  .dd.p1{box-shadow:inset 3px 0 0 var(--label-tertiary)}
  .dd-top{display:flex;align-items:baseline;justify-content:space-between;gap:8px}
  .dd h4{margin:0;color:var(--label);font-size:15px;font-weight:600;line-height:1.35;
    flex:1;letter-spacing:-0.012em}
  .dd .pri{font-size:11px;font-weight:600;color:var(--label-tertiary);
    letter-spacing:0.04em;white-space:nowrap}
  .dd .quote{margin:4px 0 0;padding:12px 14px;background:var(--surface);
    border-radius:8px;font-size:13px;color:var(--label);line-height:1.5;
    border-left:none;font-style:italic}
  .dd .quote .who{display:block;margin-top:6px;font-size:12px;
    color:var(--label-tertiary);font-style:normal}
  .dd .ask{margin:0;font-size:14px;color:var(--label-secondary);line-height:1.5}
  .dd .ask b{color:var(--label);font-weight:600}

  /* SOURCE DOCS */
  .doc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
  .doc-card{background:var(--surface-secondary);border-radius:var(--radius-card);
    padding:22px;border:none;display:flex;flex-direction:column;gap:8px;
    transition:background 0.18s ease,transform 0.18s ease}
  .doc-card:hover{background:var(--surface-tertiary);transform:translateY(-1px)}
  .doc-card .typ{font-size:11px;font-weight:600;color:var(--label-tertiary);
    text-transform:uppercase;letter-spacing:0.06em}
  .doc-card h4{margin:0;font-size:16px;color:var(--label);font-weight:600;
    line-height:1.3;letter-spacing:-0.012em}
  .doc-card p{margin:0;font-size:13px;color:var(--label-secondary);line-height:1.5}
  .doc-card a{font-size:14px;font-weight:500;color:var(--accent);
    margin-top:auto;text-decoration:none}
  .doc-card a:hover{text-decoration:underline;text-underline-offset:2px}

  footer{margin-top:96px;padding-top:32px;border-top:0.5px solid var(--separator);
    color:var(--label-tertiary);font-size:13px;text-align:center}

  /* RESPONSIVE */
  @media (max-width:768px){
    .container{padding:32px 18px 48px}
    h1{font-size:36px}
    .lede{font-size:18px}
    .mandate{font-size:20px}
    section{padding:64px 0 0}
    .charts,.opps,.personas,.views,.decisions,.ux-grid,.doc-grid,
    .quarters,.stats-grid,.dd-grid,.prod-grid,.condi-grid{grid-template-columns:1fr}
    .navbar nav{gap:18px}
    .navbar .brand{font-size:13px}
  }

/* === toggle integration === */
.navbar{display:block !important}
.navbar-inner{display:flex}