/* =========================================================
   ZSL Holdings LLC — Design Tokens
   Palette: deep navy, white, teal accent, light gray
   Type: Space Grotesk (display) / Inter (body) / JetBrains Mono (utility)
   Signature motif: the "infrastructure graph" — nodes + connecting
   lines standing in for cloud/DevOps systems, echoed as thin dividers.
   ========================================================= */

:root{
  --navy-900:#081B33;
  --navy-800:#0F2A4A;
  --navy-700:#173A63;
  --teal-500:#14B8A6;
  --teal-600:#0D9488;
  --teal-100:#E4F7F4;
  --gray-50:#F5F7FA;
  --gray-100:#EDF1F5;
  --gray-200:#DEE5EC;
  --slate-500:#5B6B82;
  --slate-600:#47566B;
  --ink:#0B1220;
  --white:#FFFFFF;

  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;

  --max-w:1180px;
  --radius:10px;
  --shadow-card: 0 1px 2px rgba(8,27,51,0.06), 0 8px 24px rgba(8,27,51,0.06);
  --transition: 180ms ease;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--slate-600);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--ink);
  margin:0 0 0.5em 0;
  line-height:1.15;
  letter-spacing:-0.01em;
}

h1{font-size:clamp(2.1rem,4.2vw,3.4rem);}
h2{font-size:clamp(1.6rem,2.6vw,2.25rem);}
h3{font-size:1.25rem;}

p{margin:0 0 1em 0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;list-style:none;}

.container{
  max-width:var(--max-w);
  margin:0 auto;
  padding:0 24px;
}

.eyebrow{
  font-family:var(--font-mono);
  text-transform:uppercase;
  letter-spacing:0.14em;
  font-size:0.75rem;
  color:var(--teal-600);
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:18px;height:1px;
  background:var(--teal-600);
  display:inline-block;
}

:focus-visible{
  outline:2px solid var(--teal-500);
  outline-offset:3px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:0.95rem;
  padding:13px 24px;
  border-radius:8px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}
.btn-primary{
  background:var(--teal-500);
  color:var(--navy-900);
}
.btn-primary:hover{background:var(--teal-600); transform:translateY(-1px);}
.btn-ghost{
  background:transparent;
  color:var(--white);
  border-color:rgba(255,255,255,0.35);
}
.btn-ghost:hover{border-color:var(--white); background:rgba(255,255,255,0.06);}
.btn-outline{
  background:transparent;
  color:var(--navy-900);
  border-color:var(--gray-200);
}
.btn-outline:hover{border-color:var(--navy-900);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(8,27,51,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 24px;
  max-width:var(--max-w);
  margin:0 auto;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.05rem;
  color:var(--white);
}
.brand-mark{
  width:30px;height:30px;
  border-radius:7px;
  background:linear-gradient(135deg, var(--teal-500), var(--navy-700));
  position:relative;
  flex-shrink:0;
}
.brand-mark::after{
  content:"";
  position:absolute; inset:8px;
  border:1.5px solid rgba(255,255,255,0.85);
  border-radius:3px;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:32px;
}
.nav-links a{
  font-size:0.92rem;
  color:rgba(255,255,255,0.78);
  font-weight:500;
  transition:color var(--transition);
}
.nav-links a:hover, .nav-links a.active{color:var(--white);}
.nav-cta{display:flex; align-items:center; gap:18px;}
.nav-toggle{
  display:none;
  background:none;
  border:none;
  color:var(--white);
  cursor:pointer;
  padding:6px;
}
.nav-toggle svg{width:24px;height:24px;}

@media (max-width:860px){
  .nav-links{
    position:absolute;
    top:100%; left:0; right:0;
    background:var(--navy-900);
    flex-direction:column;
    align-items:flex-start;
    padding:20px 24px 28px;
    gap:18px;
    border-bottom:1px solid rgba(255,255,255,0.08);
    display:none;
  }
  .nav-links.open{display:flex;}
  .nav-cta .btn-ghost{display:none;}
  .nav-toggle{display:inline-flex;}
}

/* ---------- Hero ---------- */
.hero{
  background:radial-gradient(120% 140% at 15% 0%, var(--navy-800) 0%, var(--navy-900) 55%);
  color:var(--white);
  position:relative;
  overflow:hidden;
  padding:96px 0 88px;
}
.hero .container{
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:56px;
  align-items:center;
  position:relative;
  z-index:2;
}
.hero-eyebrow{color:var(--teal-500);}
.hero-eyebrow::before{background:var(--teal-500);}
.hero h1{color:var(--white); max-width:19ch;}
.hero-sub{
  color:rgba(255,255,255,0.72);
  font-size:1.08rem;
  max-width:46ch;
  margin-bottom:32px;
}
.hero-actions{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:36px;}
.hero-stats{
  display:flex;
  gap:32px;
  border-top:1px solid rgba(255,255,255,0.14);
  padding-top:24px;
  flex-wrap:wrap;
}
.hero-stat b{
  display:block;
  font-family:var(--font-display);
  font-size:1.5rem;
  color:var(--white);
}
.hero-stat span{
  font-size:0.8rem;
  color:rgba(255,255,255,0.55);
  font-family:var(--font-mono);
  letter-spacing:0.04em;
}
.hero-graphic{position:relative;}
.hero-graphic svg{width:100%; height:auto; display:block;}

.node-pulse{animation:pulse 2.6s ease-in-out infinite;}
.node-pulse.d1{animation-delay:0.3s;}
.node-pulse.d2{animation-delay:0.9s;}
.node-pulse.d3{animation-delay:1.4s;}
@keyframes pulse{
  0%,100%{opacity:0.55; r:4;}
  50%{opacity:1; r:6;}
}
.graph-line{
  stroke-dasharray:6 6;
  animation:dash 14s linear infinite;
}
@keyframes dash{ to{ stroke-dashoffset:-240; } }

/* ---------- Section scaffolding ---------- */
section{padding:88px 0;}
.section-alt{background:var(--gray-50);}
.section-head{
  max-width:640px;
  margin:0 auto 48px;
  text-align:center;
}
.section-head.left{margin:0 0 48px; text-align:left;}

.divider-graph{
  display:flex; align-items:center; gap:10px;
  color:var(--gray-200);
  margin:0;
}
.divider-graph .line{flex:1; height:1px; background:var(--gray-200);}
.divider-graph .dot{width:6px;height:6px;border-radius:50%;background:var(--teal-500);}

/* ---------- Cards / grids ---------- */
.grid{display:grid; gap:24px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media (max-width:900px){
  .grid-3, .grid-4{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:640px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .hero .container{grid-template-columns:1fr;}
  .hero-graphic{order:-1;}
}

.card{
  background:var(--white);
  border:1px solid var(--gray-200);
  border-radius:var(--radius);
  padding:28px;
  transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-card);
  border-color:var(--teal-500);
}
.card-icon{
  width:42px;height:42px;
  border-radius:9px;
  background:var(--teal-100);
  color:var(--teal-600);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px;
}
.card-icon svg{width:22px;height:22px;}
.card h3{margin-bottom:8px;}
.card p{font-size:0.94rem; margin-bottom:0;}
.card-link{
  display:inline-flex; align-items:center; gap:6px;
  margin-top:16px; font-size:0.88rem; font-weight:600;
  color:var(--navy-800);
}
.card-link svg{width:14px;height:14px; transition:transform var(--transition);}
.card:hover .card-link svg{transform:translateX(3px);}

/* fade-in-on-scroll */
.reveal{opacity:0; transform:translateY(14px); transition:opacity 500ms ease, transform 500ms ease;}
.reveal.in{opacity:1; transform:translateY(0);}

/* ---------- Stat / logo strip ---------- */
.strip{
  border-top:1px solid var(--gray-200);
  border-bottom:1px solid var(--gray-200);
  padding:28px 0;
}
.strip .container{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:18px;
  font-family:var(--font-mono); font-size:0.78rem;
  letter-spacing:0.06em; text-transform:uppercase; color:var(--slate-500);
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--navy-900);
  color:var(--white);
  text-align:center;
  border-radius:16px;
}
.cta-band h2{color:var(--white);}
.cta-band p{color:rgba(255,255,255,0.7); max-width:52ch; margin-left:auto; margin-right:auto;}
.cta-band .container{padding-top:64px; padding-bottom:64px;}
.cta-wrap{padding:0 24px;}
.cta-actions{display:flex; justify-content:center; gap:14px; flex-wrap:wrap; margin-top:28px;}

/* ---------- Page header (inner pages) ---------- */
.page-hero{
  background:var(--navy-900);
  color:var(--white);
  padding:72px 0 56px;
}
.page-hero h1{color:var(--white); max-width:24ch;}
.page-hero p{color:rgba(255,255,255,0.72); max-width:56ch; font-size:1.05rem;}
.breadcrumb{
  font-family:var(--font-mono); font-size:0.78rem;
  color:rgba(255,255,255,0.5); letter-spacing:0.04em;
  margin-bottom:18px;
}
.breadcrumb a{color:rgba(255,255,255,0.75);}

/* ---------- Service detail blocks ---------- */
.service-block{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:48px;
  align-items:start;
  padding:56px 0;
  border-bottom:1px solid var(--gray-200);
}
.service-block:last-child{border-bottom:none;}
.service-block .tag-row{display:flex; gap:8px; flex-wrap:wrap; margin-top:18px;}
.tag{
  font-family:var(--font-mono);
  font-size:0.72rem;
  padding:5px 10px;
  border-radius:20px;
  background:var(--teal-100);
  color:var(--teal-600);
  letter-spacing:0.03em;
}
.service-sub h4{
  font-family:var(--font-body);
  font-size:0.82rem;
  text-transform:uppercase;
  letter-spacing:0.08em;
  color:var(--slate-500);
  margin-bottom:10px;
}
.service-sub{margin-bottom:22px;}
.check-list li{
  display:flex; gap:10px; align-items:flex-start;
  font-size:0.95rem; color:var(--slate-600);
  margin-bottom:10px;
}
.check-list svg{width:16px;height:16px; color:var(--teal-500); flex-shrink:0; margin-top:3px;}
@media (max-width:800px){
  .service-block{grid-template-columns:1fr;}
}

/* ---------- Industries ---------- */
.industry-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:26px 0; border-bottom:1px solid var(--gray-200);
  gap:24px;
}
.industry-row:first-child{border-top:1px solid var(--gray-200);}
.industry-name{
  display:flex; align-items:center; gap:16px;
  font-family:var(--font-display); font-size:1.15rem; color:var(--ink);
}
.industry-num{
  font-family:var(--font-mono); font-size:0.8rem; color:var(--teal-600);
}
.industry-desc{color:var(--slate-500); font-size:0.92rem; max-width:46ch; text-align:right;}
@media (max-width:700px){
  .industry-row{flex-direction:column; align-items:flex-start;}
  .industry-desc{text-align:left;}
}

/* ---------- Why choose us ---------- */
.reason{
  display:flex; gap:18px;
  padding:26px 0;
  border-bottom:1px solid var(--gray-200);
}
.reason:last-child{border-bottom:none;}
.reason-index{
  font-family:var(--font-mono); color:var(--teal-600); font-size:0.85rem; padding-top:4px;
  width:34px; flex-shrink:0;
}

/* ---------- Contact ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1.2fr;
  gap:48px;
  align-items:start;
}
@media (max-width:860px){ .contact-grid{grid-template-columns:1fr;} }
.contact-card{
  background:var(--gray-50);
  border:1px solid var(--gray-200);
  border-radius:var(--radius);
  padding:30px;
}
.contact-line{
  display:flex; gap:14px; align-items:flex-start;
  padding:16px 0; border-bottom:1px solid var(--gray-200);
}
.contact-line:last-child{border-bottom:none;}
.contact-line svg{width:20px;height:20px; color:var(--teal-600); flex-shrink:0; margin-top:2px;}
.contact-line b{display:block; color:var(--ink); font-size:0.9rem;}
.contact-line span{font-size:0.9rem;}

form.contact-form{display:flex; flex-direction:column; gap:16px;}
.form-row{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
@media (max-width:560px){.form-row{grid-template-columns:1fr;}}
label{
  font-size:0.82rem; font-weight:600; color:var(--ink);
  margin-bottom:6px; display:block;
}
input,select,textarea{
  width:100%;
  font-family:var(--font-body);
  font-size:0.95rem;
  padding:12px 14px;
  border:1px solid var(--gray-200);
  border-radius:8px;
  background:var(--white);
  color:var(--ink);
  transition:border-color var(--transition);
}
input:focus,select:focus,textarea:focus{border-color:var(--teal-500); outline:none;}
textarea{resize:vertical; min-height:120px;}
.form-note{font-size:0.8rem; color:var(--slate-500);}
.form-success{
  display:none;
  background:var(--teal-100);
  color:var(--teal-600);
  padding:14px 16px;
  border-radius:8px;
  font-size:0.9rem;
  font-weight:600;
}
.form-success.show{display:block;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--navy-900);
  color:rgba(255,255,255,0.62);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:40px;
}
@media (max-width:800px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}
.footer-brand p{max-width:34ch; font-size:0.9rem;}
.footer-col h4{
  color:var(--white); font-family:var(--font-body);
  font-size:0.82rem; text-transform:uppercase; letter-spacing:0.08em;
  margin-bottom:16px;
}
.footer-col li{margin-bottom:10px; font-size:0.9rem;}
.footer-col a:hover{color:var(--white);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);
  padding-top:24px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-size:0.8rem;
  font-family:var(--font-mono);
}