/* A-23A v3 — multidisciplinary consultancy.
   Brand tokens carried over from the live a-23a.com (Space Grotesk + DM Sans, warm off-white, single blue accent). */
:root{
  --bg:#f7f4ee; --bg-alt:#efeae0; --surface:#fffffe;
  --ink:#1b1b18; --ink-soft:#4b4943; --ink-faint:#55524a;
  --dark:#14130f; --on-dark:#f7f4ee; --on-dark-soft:#cbc6ba;
  --border:#d9d2c4; --border-strong:#8d8574;
  --accent:#0b4f8a; --accent-on-dark:#8fc0ee;
  --head:'Space Grotesk','Helvetica Neue',Arial,sans-serif;
  --body:'DM Sans',-apple-system,'Segoe UI',sans-serif;
  --max:1160px; --pad:clamp(20px,5vw,56px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--head);font-weight:600;letter-spacing:-0.02em;line-height:1.12;margin:0;color:var(--ink)}
p{margin:0}
.container{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}

.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
/* Focus + skip link */
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:2px}
.dark :focus-visible{outline-color:var(--accent-on-dark)}
.skip{position:absolute;left:-9999px;top:8px;background:var(--dark);color:var(--on-dark);padding:12px 18px;z-index:200}
.skip:focus{left:var(--pad)}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(247,244,238,.96);border-bottom:1px solid var(--border);backdrop-filter:blur(8px)}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:24px}
.brand{font-family:var(--head);font-size:1.5rem;font-weight:500;text-decoration:none;letter-spacing:-0.02em}
.brand strong{font-weight:700}
#nav ul{display:flex;align-items:center;gap:30px}
#nav a{text-decoration:none;font-size:.97rem;font-weight:500;color:var(--ink-soft);padding:8px 0;border-bottom:2px solid transparent}
#nav a:hover{color:var(--ink);border-bottom-color:var(--border-strong)}
#nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent)}
#nav a.nav-cta{background:var(--dark);color:var(--on-dark);padding:11px 20px;border-radius:2px;border:0}
#nav a.nav-cta:hover{background:var(--accent)}
.menu-btn{display:none;background:none;border:1px solid var(--border-strong);padding:10px 16px;font:500 .95rem var(--body);color:var(--ink);cursor:pointer;min-height:44px}
@media(max-width:900px){
  .menu-btn{display:block}
  #nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--border);padding:12px var(--pad) 28px}
  #nav.open{display:block}
  #nav ul{flex-direction:column;align-items:flex-start;gap:6px}
  #nav a{font-size:1.15rem;display:block;padding:12px 0}
  #nav a.nav-cta{margin-top:12px;display:inline-block}
}

/* Buttons + links */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 26px;font:600 1rem var(--body);text-decoration:none;border:1px solid var(--dark);border-radius:2px;background:var(--dark);color:var(--on-dark);cursor:pointer;min-height:48px;transition:background .2s,color .2s,border-color .2s}
.btn:hover{background:var(--accent);border-color:var(--accent)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--surface);border-color:var(--accent);color:var(--accent)}
.dark .btn{background:var(--on-dark);color:var(--dark);border-color:var(--on-dark)}
.dark .btn:hover{background:var(--accent-on-dark);border-color:var(--accent-on-dark)}
.dark .btn.ghost{background:transparent;color:var(--on-dark);border-color:var(--on-dark-soft)}
.dark .btn.ghost:hover{background:transparent;color:var(--accent-on-dark);border-color:var(--accent-on-dark)}
.link{font-weight:600;color:var(--accent);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.link:hover{text-decoration-thickness:2px}
.dark .link{color:var(--accent-on-dark)}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}

/* Sections */
section{padding:clamp(64px,9vw,120px) 0}
.alt{background:var(--bg-alt)}
.dark{background:var(--dark);color:var(--on-dark-soft)}
.dark h2,.dark h3,.dark h4{color:var(--on-dark)}
.eyebrow{font-size:.875rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.dark .eyebrow{color:var(--accent-on-dark)}
h2.display{font-size:clamp(1.9rem,3.6vw,2.9rem);max-width:20ch}
.lede{font-size:clamp(1.1rem,1.6vw,1.3rem);color:var(--ink-soft);max-width:60ch;margin-top:22px}
.dark .lede{color:var(--on-dark-soft)}
.split{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:clamp(32px,6vw,88px);align-items:start}
@media(max-width:860px){.split{grid-template-columns:1fr}}

/* Hero */
.hero{padding:clamp(56px,8vw,112px) 0 clamp(56px,7vw,96px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:clamp(36px,6vw,88px);align-items:end}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr}}
.hero h1{font-size:clamp(2.5rem,5.6vw,4.6rem);letter-spacing:-0.035em;line-height:1.03;max-width:15ch}
.hero .lede{max-width:52ch}
.index-list{border-top:2px solid var(--ink)}
.index-list li{border-bottom:1px solid var(--border)}
.index-list a{display:grid;grid-template-columns:1fr auto;gap:4px 16px;padding:18px 4px;text-decoration:none;align-items:baseline}
.index-list a:hover{background:var(--surface)}
.index-list .n{font-family:var(--head);font-weight:600;font-size:1.15rem}
.index-list .d{grid-column:1;font-size:.95rem;color:var(--ink-faint)}
.index-list .arr{grid-row:1;grid-column:2;color:var(--accent);font-weight:600}
.tag{display:inline-block;margin-left:10px;font:700 .75rem var(--body);letter-spacing:.08em;text-transform:uppercase;color:var(--accent);border:1px solid var(--accent);padding:2px 8px;vertical-align:2px}
.index-cap{font-size:.875rem;color:var(--ink-faint);margin-bottom:12px;font-weight:500}

/* Ruled rows (replaces card grids) */
.rows>li{border-top:1px solid var(--border);padding:26px 0;display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:8px 40px}
.rows>li:last-child{border-bottom:1px solid var(--border)}
.rows h3{font-size:1.25rem}
.rows p{color:var(--ink-soft)}
.rows .more{grid-column:2;margin-top:8px}
.dark .rows>li{border-color:#3a382f}
.dark .rows p{color:var(--on-dark-soft)}
@media(max-width:700px){.rows>li{grid-template-columns:1fr}.rows .more{grid-column:1}}
.num{font-family:var(--head);color:var(--accent);font-weight:600;font-size:.95rem;display:block;margin-bottom:6px;letter-spacing:.02em}
.dark .num{color:var(--accent-on-dark)}

/* Expertise rows */
.exp>li{border-top:1px solid var(--border);padding:34px 0;display:grid;grid-template-columns:70px minmax(0,4fr) minmax(0,5fr);gap:12px 36px;align-items:start}
.exp>li:last-child{border-bottom:1px solid var(--border)}
.exp h3{font-size:1.5rem}
.exp .what{color:var(--ink-soft);margin-top:8px}
.exp .caps{color:var(--ink-faint);font-size:.98rem}
.exp .more{display:inline-block;margin-top:14px}
.exp li.feature{background:var(--surface);padding-left:20px;padding-right:20px;margin:0 -20px;border-left:3px solid var(--accent)}
@media(max-width:800px){.exp>li{grid-template-columns:1fr}.exp li.feature{margin:0}}

/* Diagram */
.diagram{margin-top:48px;border:1px solid var(--border);background:var(--surface);padding:clamp(12px,3vw,32px)}
.diagram svg{width:100%;height:auto;display:block}
.diagram text{font-family:var(--head)}

/* Flow map (services diagram) */
.flowmap{margin:48px 0 0;border:1px solid var(--border);background:var(--surface);padding:clamp(22px,4vw,52px)}
.fm-stages{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 24px}
.fm-track{position:absolute;top:7px;left:16.66%;right:16.66%;height:2px;background:var(--border-strong);transform-origin:left;transition:transform 1.6s cubic-bezier(.6,0,.3,1) .2s}
.fm-track::after{content:"";position:absolute;top:-4px;left:0;width:10px;height:10px;border-radius:50%;background:var(--accent);opacity:0}
.fm-stage{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 8px;transition:opacity .7s ease var(--d),transform .7s ease var(--d)}
.fm-dot{width:16px;height:16px;border-radius:50%;background:var(--surface);border:2px solid var(--ink);margin-bottom:22px;position:relative;z-index:1}
.fm-stage h3{font-size:1.3rem;margin:6px 0 10px}
.fm-stage h3 a,.fm-bar h3 a{text-decoration:none}
.fm-stage h3 a:hover,.fm-bar h3 a:hover{text-decoration:underline;text-underline-offset:4px}
.fm-stage p{color:var(--ink-soft);font-size:.98rem;max-width:26ch}
.fm-drop{flex:1;min-height:44px;width:2px;background:var(--accent);margin-top:22px;position:relative;transform-origin:top;transition:transform .6s ease calc(var(--d) + 1.6s)}
.fm-drop::after{content:"";position:absolute;left:-4px;top:0;width:10px;height:10px;border-radius:50%;background:var(--accent);opacity:0}
.fm-bar{background:var(--dark);color:var(--on-dark-soft);text-align:center;padding:26px 28px;transition:opacity .7s ease 2.5s,transform .7s ease 2.5s}
.fm-bar h3{color:var(--on-dark);font-size:1.45rem;margin-bottom:6px}
.fm-bar p{color:var(--on-dark-soft)}
.flowmap figcaption{margin-top:22px;font-size:.95rem;color:var(--ink-faint);display:flex;gap:16px;justify-content:space-between;align-items:center;flex-wrap:wrap}
.fm-replay{background:none;border:1px solid var(--border-strong);padding:8px 14px;font:500 .9rem var(--body);color:var(--ink);cursor:pointer;min-height:40px}
.fm-replay:hover{border-color:var(--accent);color:var(--accent)}
/* hidden start state only when JS runs and the figure has not yet been revealed */
.js .flowmap.reveal:not(.in){opacity:1;transform:none}
.js .flowmap:not(.in) .fm-track{transform:scaleX(0)}
.js .flowmap:not(.in) .fm-stage{opacity:0;transform:translateY(10px)}
.js .flowmap:not(.in) .fm-drop{transform:scaleY(0)}
.js .flowmap:not(.in) .fm-bar{opacity:0;transform:translateY(10px)}
/* one finite pulse after the build-in (~5s total, then stops) */
.flowmap.in .fm-track::after{animation:fm-run 2s ease-in-out 2.2s 1 both}
.flowmap.in .fm-drop::after{animation:fm-fall 1s ease-in 2.6s 1 both}
@keyframes fm-run{0%{left:0;opacity:0}10%{opacity:1}90%{opacity:1}100%{left:calc(100% - 10px);opacity:0}}
@keyframes fm-fall{0%{top:0;opacity:0}15%{opacity:1}85%{opacity:1}100%{top:calc(100% - 10px);opacity:0}}
@media(max-width:720px){
  .fm-stages{grid-template-columns:1fr;gap:0}
  .fm-track,.fm-drop{display:none}
  .fm-stage{align-items:flex-start;text-align:left;padding:22px 0;border-top:1px solid var(--border)}
  .fm-dot{display:none}
  .fm-bar{text-align:left;margin-top:0}
}
@media(prefers-reduced-motion:reduce){
  .fm-track::after,.fm-drop::after{display:none}
  .fm-replay{display:none}
  .js .flowmap:not(.in) *{opacity:1!important;transform:none!important}
}
/* Process */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:52px;counter-reset:s}
.steps li{border-top:2px solid var(--ink);padding:22px 24px 0 0}
.steps li:first-child{border-top-color:var(--accent)}
.steps h3{font-size:1.35rem;margin:6px 0 10px}
.steps p{color:var(--ink-soft);font-size:.98rem}
@media(max-width:860px){.steps{grid-template-columns:1fr 1fr;row-gap:36px}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}

/* Lists */
.plain>li{padding:14px 0;border-top:1px solid var(--border)}
.plain>li:last-child{border-bottom:1px solid var(--border)}
.plain strong{font-family:var(--head);font-weight:600}
.cols3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 40px}
@media(max-width:800px){.cols3{grid-template-columns:1fr}}
.cols2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
@media(max-width:800px){.cols2{grid-template-columns:1fr}}
.dash>li{position:relative;padding:11px 0 11px 24px;border-top:1px solid var(--border)}
.dash>li::before{content:"";position:absolute;left:0;top:1.35em;width:10px;height:2px;background:var(--accent)}
.dark .dash>li{border-color:#3a382f}
.dark .dash>li::before{background:var(--accent-on-dark)}
.sector{padding:18px 0;border-top:1px solid var(--border)}
.sector h3{font-size:1.1rem}
.sector p{color:var(--ink-faint);font-size:.97rem}
.quote{font-family:var(--head);font-size:1.15rem;line-height:1.4;padding:18px 0 18px 22px;border-left:3px solid var(--accent);margin-bottom:14px;color:var(--ink)}

/* Table */
.table-wrap{overflow-x:auto;margin-top:40px}
table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border)}
caption{text-align:left;padding:0 0 14px;color:var(--ink-faint);font-size:.95rem}
th,td{text-align:left;padding:16px 20px;vertical-align:top;border-top:1px solid var(--border);font-size:1rem}
thead th{font-family:var(--head);font-size:1rem;border-top:0;border-bottom:2px solid var(--ink)}
th[scope=row]{font-weight:500;color:var(--ink-soft);width:50%}
td{font-weight:500}
thead th:last-child,td:last-child{background:#eef3f8}

/* Governance diagram */
.gov{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:40px}
.gov div{border:1px solid var(--border);background:var(--surface);padding:20px;font-family:var(--head);font-weight:600;text-align:center}
.gov .core{grid-column:1/-1;background:var(--dark);color:var(--on-dark);border-color:var(--dark)}
@media(max-width:560px){.gov{grid-template-columns:1fr 1fr}}

/* Subnav (accessibility section) */
.subnav{border-bottom:1px solid var(--border);background:var(--bg)}
.subnav ul{display:flex;gap:28px;overflow-x:auto}
.subnav a{display:block;padding:14px 0;text-decoration:none;font-weight:500;font-size:.97rem;color:var(--ink-soft);border-bottom:2px solid transparent;white-space:nowrap}
.subnav a:hover{color:var(--ink)}
.subnav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent)}

/* Page head */
.page-head{padding:clamp(56px,7vw,100px) 0 clamp(40px,5vw,64px)}
.page-head h1{font-size:clamp(2.2rem,4.6vw,3.8rem);letter-spacing:-0.03em;max-width:18ch}
.crumb{font-size:.95rem;color:var(--ink-faint);margin-bottom:22px}
.crumb a{color:var(--ink-faint)}
.prose p{max-width:62ch;color:var(--ink-soft)}
.prose p+p{margin-top:16px}
.note{font-size:.95rem;color:var(--ink-faint);max-width:70ch;margin-top:24px}
.portrait{width:100%;max-width:300px;aspect-ratio:4/5;object-fit:cover;background:var(--bg-alt);border:1px solid var(--border)}

/* Form */
.field{margin-bottom:22px}
label{display:block;font-weight:600;margin-bottom:8px;font-size:.98rem}
input,textarea,select{width:100%;padding:13px 14px;font:1rem var(--body);color:var(--ink);background:var(--surface);border:1px solid var(--border-strong);border-radius:2px;min-height:48px}
textarea{min-height:150px;resize:vertical}
.hint{font-size:.9rem;color:var(--ink-faint);margin-top:6px}
.status{margin-top:18px;font-weight:600;color:var(--accent)}

/* CTA + footer */
.cta h2{font-size:clamp(2rem,4.2vw,3.4rem);max-width:19ch}
footer{background:var(--dark);color:var(--on-dark-soft);padding:64px 0 32px}
footer a{color:var(--on-dark-soft);text-decoration:none}
footer a:hover{color:var(--on-dark);text-decoration:underline}
footer h2{font:700 .8125rem var(--body);letter-spacing:.1em;text-transform:uppercase;color:#a29d90;margin-bottom:16px}
footer li{margin-bottom:9px;font-size:.98rem}
.foot{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid #3a382f}
.foot .brand{color:var(--on-dark);display:inline-block;margin-bottom:12px}
.foot p{font-size:.98rem;max-width:34ch}
.legal{padding-top:24px;font-size:.9rem;color:#a29d90;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media(max-width:800px){.foot{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.foot{grid-template-columns:1fr}}

/* Motion: only when JS is present, and never under reduced-motion */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms!important}
}

/* Iceberg note (tools section) */
.tools-head{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:center}
.berg{margin:0;display:grid;grid-template-columns:150px 1fr;grid-template-rows:1fr 1fr;column-gap:18px;height:220px}
.berg svg{grid-row:1/3;grid-column:1;width:150px;height:auto;align-self:center}
.berg figcaption{grid-column:2;font-size:.95rem;color:var(--ink-faint);line-height:1.4;display:flex;flex-direction:column;justify-content:center}
.berg figcaption strong{color:var(--ink);font-family:var(--head);font-size:1rem;margin-bottom:2px}
.berg .below{border-top:1.5px dashed var(--accent)}
@media(max-width:900px){.tools-head{grid-template-columns:1fr;gap:28px}.berg{height:180px;max-width:320px}}

.index-note{margin-top:16px;font-size:.98rem;color:var(--ink-faint)}