/* ===================================================================
   Alliance Acquirer — Design tokens v3 (light theme)
   Warm-white ground, crisp white glass cards, deep brass/amber
   accent standing in for the seal of a firm founded in 2000. Each
   sector in the clientele directory keeps its own accent colour so
   the page still reads like distinct channels on a dashboard.
   =================================================================== */

:root{
  --bg:        #fbfaf7;
  --bg-2:      #f1efe8;
  --glass:     #ffffff;
  --glass-hi:  #fffdf8;
  --border:    rgba(20,24,31,0.11);
  --border-hi: rgba(20,24,31,0.26);
  --ink:       #14181f;
  --muted:     #55606f;
  --muted-2:   #838d9c;
  --accent:    #b3761f;
  --accent-2:  #0d9488;

  --sector-banking: #b3761f;
  --sector-telecom: #0d9488;
  --sector-mfg:     #c2410c;
  --sector-health:  #be123c;
  --sector-edu:     #6d28d9;

  --shadow-sm: 0 2px 10px rgba(20,24,31,0.05);
  --shadow-md: 0 10px 28px rgba(20,24,31,0.09);

  --display: "Source Serif 4", Georgia, serif;
  --body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; font-size:17px; }

body{
  margin:0;
  background:
    radial-gradient(60% 50% at 12% 0%, rgba(179,118,31,0.07), transparent 60%),
    radial-gradient(50% 45% at 100% 10%, rgba(13,148,136,0.06), transparent 60%),
    var(--bg);
  color:var(--ink);
  font-family:var(--body);
  font-size:1rem;
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}

a{ color:inherit; }
::selection{ background:var(--accent); color:#fff; }

/* ---------- Header / nav ---------- */

.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(251,250,247,0.82);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--border);
}

.site-header .wrap{
  max-width:1120px;
  margin:0 auto;
  padding:18px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
}

.brand svg{ width:34px; height:34px; flex-shrink:0; }

.brand-name{
  font-family:var(--display);
  font-size:1.22rem;
  font-weight:600;
  color:var(--ink);
  letter-spacing:0.01em;
}

.brand-est{
  font-family:var(--mono);
  font-size:0.72rem;
  color:var(--accent);
  letter-spacing:0.15em;
  display:block;
  margin-top:2px;
}

nav.site-nav{ display:flex; gap:8px; font-size:1rem; }

nav.site-nav a{
  text-decoration:none;
  color:var(--muted);
  padding:8px 18px;
  border-radius:999px;
  transition:color .15s ease, background .15s ease;
}

nav.site-nav a:hover{ color:var(--ink); background:var(--bg-2); }

nav.site-nav a[aria-current="page"]{
  color:#fff;
  background:var(--accent);
  font-weight:600;
}

/* ---------- Reveal-on-scroll ---------- */

.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{ opacity:1; transform:translateY(0); }

/* ---------- Hero (home) ---------- */

.hero{
  max-width:1120px;
  margin:0 auto;
  padding:96px 32px 64px;
}

.hero-copy .eyebrow{
  font-family:var(--mono);
  font-size:0.82rem;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--accent);
  margin:0 0 20px;
}

.hero h1{
  font-family:var(--display);
  font-size:3.6rem;
  line-height:1.05;
  margin:0 0 22px;
  color:var(--ink);
  font-weight:600;
  letter-spacing:-0.01em;
}

.hero .lede{
  max-width:56ch;
  font-size:1.25rem;
  color:var(--muted);
}

.hero .lede strong{ color:var(--ink); font-weight:600; }

/* ---------- Section shell ---------- */

section{ max-width:1120px; margin:0 auto; padding:0 32px 76px; }

.section-label{
  font-family:var(--mono);
  font-size:0.82rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:24px;
}
.section-label::after{ content:""; flex:1; height:1px; background:var(--border); }

/* ---------- Associated firms (home) ---------- */

.firms{
  list-style:none;
  margin:0; padding:0;
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:18px;
}

.firms li{
  position:relative;
  background:var(--glass);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  padding:28px 24px 24px;
  font-family:var(--display);
  font-size:1.2rem;
  color:var(--ink);
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.firms li::before{
  content:"";
  position:absolute; left:0; top:0; bottom:0;
  width:3px;
  background:var(--accent);
}

.firms li:hover{
  transform:translateY(-4px);
  border-color:var(--border-hi);
  box-shadow:var(--shadow-md);
}

/* ---------- Services grid (home) ---------- */

.services-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:14px;
}

.service-card{
  background:var(--glass);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  padding:24px 26px;
  display:flex;
  gap:16px;
  align-items:flex-start;
  transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.service-card:hover{
  transform:translateY(-3px);
  border-color:var(--accent);
  box-shadow:var(--shadow-md);
}

.service-card .mark{
  font-family:var(--mono);
  font-size:0.8rem;
  color:var(--accent);
  border:1px solid var(--accent);
  border-radius:50%;
  width:30px; height:30px;
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0; margin-top:2px;
  transition:background .2s ease, color .2s ease;
}

.service-card:hover .mark{ background:var(--accent); color:#fff; }

.service-card p{ margin:0; font-size:1.08rem; color:var(--ink); }

/* ---------- App callout (home) ---------- */

.app-callout{
  position:relative;
  border:1px solid var(--border);
  background:linear-gradient(135deg, rgba(179,118,31,0.08), rgba(13,148,136,0.05));
  box-shadow:var(--shadow-sm);
  padding:32px 34px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}

.app-callout .app-name{
  font-family:var(--display);
  font-size:1.36rem;
  color:var(--ink);
  margin:0 0 6px;
}

.app-callout .app-sub{ font-size:1.02rem; color:var(--muted); margin:0; }

.app-callout .powered{
  font-family:var(--mono);
  font-size:0.8rem;
  letter-spacing:0.09em;
  text-transform:uppercase;
  color:var(--accent);
  border:1px solid var(--accent);
  padding:10px 18px;
  white-space:nowrap;
}

/* ---------- Clientele directory ---------- */

.dir-hero{
  max-width:1120px;
  margin:0 auto;
  padding:68px 32px 8px;
}

.dir-hero .eyebrow{
  font-family:var(--mono);
  font-size:0.82rem;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--accent);
  margin:0 0 18px;
}

.dir-hero h1{
  font-family:var(--display);
  font-size:2.8rem;
  color:var(--ink);
  margin:0 0 16px;
}

.dir-hero p{ color:var(--muted); max-width:66ch; margin:0 0 34px; font-size:1.16rem; }

.stat-row{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:1px;
  background:var(--border);
  border:1px solid var(--border);
  margin-bottom:8px;
  box-shadow:var(--shadow-sm);
}

.stat{
  background:var(--glass);
  padding:22px 24px;
}

.stat .num{
  font-family:var(--display);
  font-size:2.05rem;
  color:var(--accent);
  display:block;
  line-height:1;
}

.stat .lbl{
  font-family:var(--mono);
  font-size:0.76rem;
  letter-spacing:0.09em;
  text-transform:uppercase;
  color:var(--muted);
  display:block;
  margin-top:9px;
}

/* ---------- Controls: search + filter chips ---------- */

.controls{
  position:sticky;
  top:70px;
  z-index:40;
  background:rgba(251,250,247,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  border-top:1px solid var(--border);
}

.controls .wrap{
  max-width:1120px;
  margin:0 auto;
  padding:18px 32px;
  display:flex;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
}

.search-box{
  display:flex;
  align-items:center;
  gap:10px;
  background:var(--glass);
  border:1px solid var(--border);
  padding:10px 15px;
  min-width:240px;
  flex:0 1 280px;
}

.search-box svg{ width:17px; height:17px; color:var(--muted); flex-shrink:0; }

.search-box input{
  background:none;
  border:none;
  outline:none;
  color:var(--ink);
  font-family:var(--body);
  font-size:1.02rem;
  width:100%;
}
.search-box input::placeholder{ color:var(--muted-2); }

.chips{
  display:flex;
  gap:8px;
  flex-wrap:nowrap;
  flex:1;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
  scrollbar-color:var(--border-hi) transparent;
  padding-bottom:2px;
}

.chips::-webkit-scrollbar{ height:5px; }
.chips::-webkit-scrollbar-thumb{ background:var(--border-hi); border-radius:999px; }
.chips::-webkit-scrollbar-track{ background:transparent; }

.chip{
  font-family:var(--mono);
  font-size:0.8rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--muted);
  background:var(--glass);
  border:1px solid var(--border);
  padding:9px 16px;
  cursor:pointer;
  transition:all .18s ease;
  flex-shrink:0;
  white-space:nowrap;
}

.chip:hover{ color:var(--ink); border-color:var(--border-hi); }

.chip.active{
  color:#fff;
  background:var(--chip-color, var(--accent));
  border-color:var(--chip-color, var(--accent));
  font-weight:600;
}

.no-results{
  display:none;
  max-width:1120px;
  margin:48px auto;
  padding:0 32px;
  text-align:center;
  color:var(--muted);
  font-family:var(--mono);
  font-size:0.95rem;
}
.no-results.show{ display:block; }

/* ---------- Sector sections ---------- */

.sector{
  max-width:1120px;
  margin:0 auto;
  padding:58px 32px 8px;
  scroll-margin-top:150px;
  transition:opacity .2s ease;
}

.sector-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:28px;
  padding-bottom:18px;
  border-bottom:1px solid var(--border);
}

.sector-head .icon{
  width:40px; height:40px;
  flex-shrink:0;
  border:1px solid var(--accent-c, var(--accent));
  color:var(--accent-c, var(--accent));
  display:flex; align-items:center; justify-content:center;
}
.sector-head .icon svg{ width:20px; height:20px; }

.sector-head h2{
  font-family:var(--display);
  font-size:1.62rem;
  color:var(--ink);
  margin:0;
  flex:1;
}

.sector-head .count{
  font-family:var(--mono);
  font-size:0.8rem;
  color:var(--muted);
  letter-spacing:0.05em;
}

.card-list{ display:grid; gap:14px; margin-bottom:8px; }

/* ---------- Client card (details/summary) ---------- */

.client-card{
  background:var(--glass);
  border:1px solid var(--border);
  border-left:3px solid var(--accent-c, var(--accent));
  box-shadow:var(--shadow-sm);
  transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.client-card:hover{
  border-color:var(--border-hi);
  border-left-color:var(--accent-c, var(--accent));
  box-shadow:var(--shadow-md);
}

.client-card summary{
  list-style:none;
  cursor:pointer;
  padding:24px 28px;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
}
.client-card summary::-webkit-details-marker{ display:none; }

.summary-text h3{
  font-family:var(--display);
  font-size:1.2rem;
  color:var(--ink);
  margin:0 0 11px;
  line-height:1.4;
}

.loc{
  font-family:var(--mono);
  font-size:0.82rem;
  letter-spacing:0.03em;
  color:var(--accent-c, var(--accent));
  text-transform:uppercase;
  margin:0;
  display:flex;
  align-items:center;
  gap:6px;
}
.loc svg{ width:14px; height:14px; flex-shrink:0; }

.chevron{
  width:23px; height:23px;
  flex-shrink:0;
  color:var(--muted);
  transition:transform .25s ease;
  margin-top:4px;
}
.client-card[open] .chevron{ transform:rotate(180deg); }

.card-body{
  padding:0 28px 28px;
  border-top:1px solid var(--border);
  margin-top:2px;
  padding-top:22px;
}

.svc-heading{
  font-family:var(--mono);
  font-size:0.78rem;
  letter-spacing:0.09em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 11px;
}

.card-body ul{ margin:0; padding-left:20px; }
.card-body ul ul{ margin-top:8px; padding-left:20px; }
.card-body li{ margin-bottom:8px; font-size:1.05rem; color:var(--ink); }
.card-body li::marker{ color:var(--accent-c, var(--accent)); }

.card-body details{
  margin-top:4px;
  border-left:2px solid var(--border);
  padding-left:14px;
}
.card-body details summary{
  all:unset;
  cursor:pointer;
  font-family:var(--mono);
  font-size:0.78rem;
  letter-spacing:0.07em;
  text-transform:uppercase;
  color:var(--accent-c, var(--accent));
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin:6px 0 4px;
}
.card-body details summary::before{
  content:"+";
  display:inline-block;
  width:14px;
}
.card-body details[open] summary::before{ content:"–"; }

/* ---------- Footer ---------- */

footer{
  border-top:1px solid var(--border);
  padding:38px 32px;
  text-align:center;
  font-size:0.92rem;
  color:var(--muted-2);
  font-family:var(--mono);
  letter-spacing:0.02em;
}

/* ---------- Responsive ---------- */

@media (max-width:860px){
  .hero{ padding-top:56px; }
  .hero h1{ font-size:2.4rem; }
  .firms{ grid-template-columns:1fr; }
  .services-grid{ grid-template-columns:1fr; }
  .stat-row{ grid-template-columns:repeat(2, 1fr); }
  .controls .wrap{ padding:14px 20px; }
  section, .dir-hero, .sector{ padding-left:20px; padding-right:20px; }
  .site-header .wrap{ padding:14px 20px; }
  nav.site-nav a{ padding:8px 13px; font-size:0.92rem; }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; animation:none !important; }
}

a:focus-visible, .chip:focus-visible, summary:focus-visible, input:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}