/* ===========================================================
   BuildStackSoftware — Design System
   Ink navy / paper light, Space Grotesk + Inter, node/line motif
   =========================================================== */

:root{
  --ink:        #10141C;
  --ink-2:      #161B26;
  --ink-3:      #1D2431;
  --paper:      #F5F3ED;
  --paper-2:    #ECE9E0;
  --text-dark:  #141821;
  --text-onink: #EDEBE3;
  --muted:      #8B93A3;
  --muted-dark: #5B6472;
  --amber:      #E8A33D;
  --amber-dim:  #C88A2E;
  --slate:      #4A6483;
  --line-onink: rgba(237,235,227,0.12);
  --line-onpaper: rgba(20,24,33,0.12);
  --radius-sm: 3px;
  --radius-md: 6px;
  --maxw: 1180px;
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--paper);
  color: var(--text-dark);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  margin:0 0 0.5em;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height:1.12;
}
p{ margin:0 0 1em; color: inherit; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family: inherit; cursor:pointer; }

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

.wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 640px){
  .wrap{ padding: 0 20px; }
}

section{ position:relative; }

/* ---------- utility type scale ---------- */
.eyebrow{
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--amber-dim);
  margin-bottom: 14px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width: 20px;
  height: 1px;
  background: var(--amber-dim);
  display:inline-block;
}
.on-ink .eyebrow{ color: var(--amber); }
.on-ink .eyebrow::before{ background: var(--amber); }

h1.display{ font-size: clamp(34px, 5vw, 58px); }
h2.section-title{ font-size: clamp(26px, 3.4vw, 38px); max-width: 640px; }
.lede{ font-size: 18px; color: var(--muted-dark); max-width: 560px; }
.on-ink .lede{ color: var(--muted); }
.small{ font-size: 14px; color: var(--muted-dark); }
.on-ink .small{ color: var(--muted); }

/* ---------- header / nav ---------- */
.site-header{
  position: sticky;
  top:0;
  z-index: 100;
  background: rgba(16,20,28,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-onink);
}
.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height: 72px;
}
.logo{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text-onink);
  display:flex;
  align-items:center;
  gap:9px;
  white-space: nowrap;
}
.logo .mark{
  width:18px; height:18px;
  position:relative;
  flex-shrink:0;
}
.logo .mark svg{ width:100%; height:100%; }
.logo .brand-soft{ color: var(--muted); font-weight: 500; }
.nav-links{
  display:flex;
  align-items:center;
  gap: 24px;
}
.nav-links a{
  color: var(--muted);
  font-size: 14.5px;
  font-weight: 500;
  transition: color .15s ease;
  position:relative;
}
.nav-links a:hover, .nav-links a.active{ color: var(--text-onink); }
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:-24px;
  height:2px;
  background: var(--amber);
}
.nav-cta{
  background: var(--amber);
  color: var(--ink);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  transition: background .15s ease, transform .15s ease;
}
.nav-cta:hover{ background: #f0b158; }
.nav-toggle{
  display:none;
  background:none;
  border:none;
  color: var(--text-onink);
  font-size: 24px;
}
.mobile-panel{
  display:none;
  background: var(--ink);
  border-bottom: 1px solid var(--line-onink);
}
.mobile-panel.open{ display:block; }
.mobile-panel .wrap{ flex-direction:column; align-items:stretch; padding: 20px 32px 28px; height:auto; gap: 4px;}
.mobile-panel a{ color: var(--muted); padding: 10px 0; font-size:15px; border-bottom:1px solid var(--line-onink); }
.mobile-panel a:last-child{ border-bottom:none; }

@media (max-width: 920px){
  .nav-links{ display:none; }
  .nav-toggle{ display:block; }
  .nav-cta.desktop-only{ display:none; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding: 14px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: background .15s ease, border-color .15s ease, color .15s ease, transform .1s ease;
  white-space: nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--amber); color: var(--ink); }
.btn-primary:hover{ background: #f0b158; }
.btn-outline-ink{ border-color: var(--line-onink); color: var(--text-onink); }
.btn-outline-ink:hover{ border-color: var(--text-onink); }
.btn-outline-dark{ border-color: var(--line-onpaper); color: var(--text-dark); }
.btn-outline-dark:hover{ border-color: var(--text-dark); }
.btn-ghost{ color: var(--text-dark); padding-left:0; padding-right:0; }
.btn-ghost .arrow{ transition: transform .15s ease; }
.btn-ghost:hover .arrow{ transform: translateX(3px); }
.on-ink .btn-ghost{ color: var(--text-onink); }

.cta-row{ display:flex; gap:16px; flex-wrap:wrap; align-items:center; }

/* ---------- sections: ink & paper alternation ---------- */
.on-ink{ background: var(--ink); color: var(--text-onink); }
.on-paper{ background: var(--paper); color: var(--text-dark); }
.on-paper-2{ background: var(--paper-2); color: var(--text-dark); }

.section-pad{ padding: 96px 0; }
@media (max-width: 640px){ .section-pad{ padding: 64px 0; } }

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap: 40px;
  margin-bottom: 52px;
  flex-wrap:wrap;
}

/* ---------- hero ---------- */
.hero{
  background: var(--ink);
  color: var(--text-onink);
  padding: 76px 0 90px;
  overflow:hidden;
  position:relative;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items:center;
}
@media (max-width: 900px){
  .hero-grid{ grid-template-columns:1fr; }
}
.hero h1{ color: var(--text-onink); }
.trust-row{
  display:flex;
  flex-wrap:wrap;
  gap: 28px;
  margin-top: 52px;
  padding-top: 28px;
  border-top: 1px solid var(--line-onink);
}
.trust-item{
  display:flex;
  align-items:center;
  gap:10px;
  font-size: 13.5px;
  color: var(--muted);
  font-weight:500;
}
.trust-item svg{ flex-shrink:0; }

.hero-diagram{
  aspect-ratio: 1/0.95;
  position:relative;
}

/* ---------- problem/value section ---------- */
.problem-list{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line-onpaper);
  border: 1px solid var(--line-onpaper);
  margin-top: 48px;
}
@media (max-width: 720px){ .problem-list{ grid-template-columns:1fr; } }
.problem-item{
  background: var(--paper);
  padding: 26px 28px;
  display:flex;
  gap:16px;
  align-items:flex-start;
}
.problem-item svg{ flex-shrink:0; margin-top:3px; }
.problem-item p{ margin:0; font-size:15.5px; color: var(--text-dark); }

/* ---------- service cards ---------- */
.services-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-onink);
  border: 1px solid var(--line-onink);
}
@media (max-width: 980px){ .services-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .services-grid{ grid-template-columns: 1fr; } }
.service-card{
  background: var(--ink);
  padding: 34px 26px;
  display:flex;
  flex-direction:column;
  min-height: 230px;
  transition: background .18s ease;
}
.service-card:hover{ background: var(--ink-2); }
.service-card .num{
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}
.service-card h3{ font-size: 18px; color: var(--text-onink); margin-bottom:10px; }
.service-card p{ font-size: 14px; color: var(--muted); flex:1; }
.service-card .learn{
  font-size: 13.5px;
  font-weight:600;
  color: var(--amber);
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top: 18px;
}
.service-card .learn .arrow{ transition: transform .15s ease; }
.service-card:hover .learn .arrow{ transform: translateX(3px); }

/* ---------- why choose us ---------- */
.why-grid{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 40px 32px;
  margin-top: 48px;
}
@media (max-width: 900px){ .why-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .why-grid{ grid-template-columns: 1fr; } }
.why-item .idx{
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--amber-dim);
  margin-bottom: 14px;
}
.why-item h3{ font-size: 17px; margin-bottom: 8px; }
.why-item p{ font-size: 14.5px; color: var(--muted-dark); margin:0; }

/* ---------- case studies ---------- */
.case-grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 28px;
  margin-top: 48px;
}
@media (max-width: 940px){ .case-grid{ grid-template-columns:1fr; } }
.case-card{
  border: 1px solid var(--line-onpaper);
  background: var(--paper);
  display:flex;
  flex-direction:column;
}
.case-thumb{
  aspect-ratio: 16/10;
  background: var(--ink);
  position:relative;
  overflow:hidden;
}
.case-thumb svg{ width:100%; height:100%; display:block; }
.case-body{ padding: 26px 26px 28px; }
.case-tag{ font-size:12.5px; font-weight:600; color: var(--amber-dim); margin-bottom:10px; }
.case-card h3{ font-size: 19px; margin-bottom: 10px; }
.case-card p{ font-size: 14.5px; color: var(--muted-dark); }
.case-metrics{
  display:flex;
  gap: 22px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line-onpaper);
}
.case-metric b{
  display:block;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text-dark);
}
.case-metric span{ font-size: 12px; color: var(--muted-dark); }
.placeholder-note{
  font-size: 12px;
  color: var(--muted-dark);
  font-style: italic;
  margin-top: 4px;
}
.on-ink .placeholder-note{ color: var(--muted); }

/* ---------- industries ---------- */
.industry-grid{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 1px;
  background: var(--line-onpaper);
  border: 1px solid var(--line-onpaper);
  margin-top: 48px;
}
@media (max-width: 900px){ .industry-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .industry-grid{ grid-template-columns: 1fr; } }
.industry-card{
  background: var(--paper);
  padding: 30px 24px;
  transition: background .15s ease;
}
.industry-card:hover{ background: var(--paper-2); }
.industry-card h3{ font-size: 16.5px; margin-bottom: 8px; }
.industry-card p{ font-size: 13.5px; color: var(--muted-dark); margin:0; }

/* ---------- process ---------- */
.process-row{
  display:grid;
  grid-template-columns: repeat(5,1fr);
  gap: 24px;
  margin-top: 52px;
  position:relative;
}
@media (max-width: 980px){ .process-row{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .process-row{ grid-template-columns: 1fr; } }
.process-step .step-num{
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--amber);
  border: 1px solid var(--line-onink);
  width: 42px; height:42px;
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  margin-bottom: 20px;
}
.process-step h3{ font-size: 16.5px; color: var(--text-onink); margin-bottom: 8px; }
.process-step p{ font-size: 13.5px; color: var(--muted); margin:0; }

/* ---------- tech ---------- */
.tech-cols{
  display:grid;
  grid-template-columns: repeat(5,1fr);
  gap: 28px;
  margin-top: 44px;
}
@media (max-width: 900px){ .tech-cols{ grid-template-columns: repeat(2,1fr);} }
@media (max-width: 560px){ .tech-cols{ grid-template-columns: 1fr;} }
.tech-col h4{
  font-size: 12.5px;
  text-transform: none;
  color: var(--muted-dark);
  font-family: var(--font-body);
  font-weight:600;
  margin-bottom: 14px;
  letter-spacing: 0.01em;
}
.tech-col ul li{
  font-size: 14.5px;
  padding: 7px 0;
  border-top: 1px solid var(--line-onpaper);
  color: var(--text-dark);
}
.tech-col ul li:first-child{ border-top:none; }

/* ---------- testimonials ---------- */
.testi-grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1px;
  background: var(--line-onink);
  border:1px solid var(--line-onink);
  margin-top: 48px;
}
@media (max-width: 900px){ .testi-grid{ grid-template-columns: 1fr; } }
.testi-card{
  background: var(--ink);
  padding: 32px 28px;
}
.testi-card p.quote{
  font-size: 16px;
  color: var(--text-onink);
  line-height:1.6;
  margin-bottom: 22px;
}
.testi-who b{ display:block; font-size:14.5px; color: var(--text-onink); }
.testi-who span{ font-size: 13px; color: var(--muted); }

/* ---------- lead form ---------- */
.lead-section{ background: var(--paper-2); }
.lead-grid{
  display:grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items:flex-start;
}
@media (max-width: 900px){ .lead-grid{ grid-template-columns: 1fr; } }
.lead-form{
  background: var(--paper);
  border: 1px solid var(--line-onpaper);
  padding: 36px;
}
.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap:18px; margin-bottom:18px; }
@media (max-width: 560px){ .form-row{ grid-template-columns: 1fr; } }
.field{ display:flex; flex-direction:column; gap:7px; margin-bottom:18px; }
.field label{ font-size: 13px; font-weight:600; color: var(--text-dark); }
.field input, .field select, .field textarea{
  border: 1px solid var(--line-onpaper);
  background: #fff;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 14.5px;
  border-radius: var(--radius-sm);
  color: var(--text-dark);
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline: 2px solid var(--amber);
  outline-offset:0;
  border-color: transparent;
}
.field textarea{ resize: vertical; min-height: 100px; }
.form-foot{ display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-top: 8px; }
.whatsapp-link{
  display:inline-flex; align-items:center; gap:8px;
  font-size: 14px; font-weight:600; color: var(--slate);
}
.form-status{ font-size: 13.5px; margin-top: 14px; }
.form-status.error{ color: #C0392B; }

/* ---------- footer ---------- */
.site-footer{
  background: var(--ink);
  color: var(--text-onink);
  padding: 72px 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr repeat(4, 0.9fr);
  gap: 32px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line-onink);
}
@media (max-width: 900px){ .footer-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .footer-grid{ grid-template-columns: 1fr; } }
.footer-grid h4{
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--muted);
  font-weight:600;
  margin-bottom: 16px;
}
.footer-grid ul li{ margin-bottom: 10px; }
.footer-grid ul li a{ font-size: 14px; color: var(--text-onink); opacity:0.85; }
.footer-grid ul li a:hover{ color: var(--amber); opacity:1; }
.footer-brand p{ color: var(--muted); font-size: 14px; max-width: 280px; }
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-top: 28px;
  flex-wrap:wrap;
  gap: 12px;
}
.footer-bottom .small{ color: var(--muted); }
.social-row{ display:flex; gap:16px; }
.social-row a{ color: var(--muted); display:inline-flex; align-items:center; justify-content:center; transition: color .15s ease; }
.social-row a:hover{ color: var(--amber); }

/* ---------- sticky mobile CTA ---------- */
.sticky-cta{
  position: fixed;
  bottom:0; left:0; right:0;
  z-index: 90;
  background: var(--ink);
  border-top: 1px solid var(--line-onink);
  padding: 14px 20px;
  display:none;
  align-items:center;
  gap: 12px;
}
.sticky-cta .btn{ flex:1; }
@media (max-width: 720px){ .sticky-cta{ display:flex; } body{ padding-bottom: 76px; } }

/* ---------- generic page hero (inner pages) ---------- */
.page-hero{
  background: var(--ink);
  color: var(--text-onink);
  padding: 64px 0 60px;
}
.breadcrumb{ font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a{ color: var(--muted); }
.breadcrumb a:hover{ color: var(--text-onink); }
.page-hero .lede{ max-width: 640px; }

/* ---------- content blocks (service pages) ---------- */
.content-grid{
  display:grid;
  grid-template-columns: 2fr 1fr;
  gap: 56px;
}
@media (max-width: 900px){ .content-grid{ grid-template-columns: 1fr; } }
.content-grid h2{ font-size: 24px; margin-top: 44px; scroll-margin-top: 96px; }
.content-grid h2:first-child{ margin-top:0; }
.content-grid p{ font-size: 15.5px; color: var(--text-dark); max-width: 640px; }
.content-grid ul.check-list li{
  display:flex; gap:10px; align-items:flex-start;
  font-size: 15px; padding: 10px 0; border-top: 1px solid var(--line-onpaper);
}
.content-grid ul.check-list li:first-child{ border-top:none; }
.content-grid ul.check-list svg{ flex-shrink:0; margin-top:4px; }

.sidebar-card{
  background: var(--paper-2);
  border: 1px solid var(--line-onpaper);
  padding: 28px;
  position:sticky;
  top: 96px;
}
.sidebar-card h4{ font-family: var(--font-display); font-size:16px; margin-bottom:12px; }
.sidebar-card p{ font-size: 14px; color: var(--muted-dark); }
.sidebar-list li{ font-size: 14px; padding: 9px 0; border-top: 1px solid var(--line-onpaper); }
.sidebar-list li:first-child{ border-top:none; }
.sidebar-list a:hover{ color: var(--amber-dim); }

/* ---------- FAQ ---------- */
.faq-item{
  border-top: 1px solid var(--line-onpaper);
  padding: 22px 0;
}
.faq-item:last-child{ border-bottom: 1px solid var(--line-onpaper); }
.faq-q{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 20px;
  font-family: var(--font-display);
  font-size: 16.5px;
  cursor:pointer;
  background:none;
  border:none;
  width:100%;
  text-align:left;
  color: var(--text-dark);
  padding:0;
}
.faq-q .plus{ transition: transform .2s ease; flex-shrink:0; color: var(--amber-dim); font-size:20px; }
.faq-item.open .plus{ transform: rotate(45deg); }
.faq-a{
  max-height:0;
  overflow:hidden;
  transition: max-height .25s ease;
}
.faq-a p{ font-size: 14.5px; color: var(--muted-dark); padding-top: 14px; max-width: 620px; }

/* ---------- industry / case detail rows ---------- */
.split-row{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items:center;
}
@media (max-width: 860px){ .split-row{ grid-template-columns: 1fr; } }
.split-row.reverse .split-visual{ order:2; }
@media (max-width: 860px){ .split-row.reverse .split-visual{ order:0; } }

/* ---------- misc ---------- */
.divider{ height:1px; background: var(--line-onpaper); }
.stat-row{ display:flex; gap: 44px; flex-wrap:wrap; margin-top: 40px; }
.stat b{ display:block; font-family: var(--font-display); font-size: 30px; }
.stat span{ font-size: 13px; color: var(--muted-dark); }
.on-ink .stat span{ color: var(--muted); }

.thankyou-box{
  max-width: 560px;
  margin: 0 auto;
  text-align:center;
  padding: 100px 0 120px;
}
.thankyou-box .icon-circle{
  width:64px; height:64px;
  border-radius:50%;
  border: 1px solid var(--line-onpaper);
  display:flex; align-items:center; justify-content:center;
  margin: 0 auto 28px;
}

/* reduced motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}