/* =========================================================
   MDCS v2 — "Blueprint" design direction
   Cyanotype dark mode (default) + Drafting-table light mode
   Grounded in the subject: engineering blueprints & spec sheets
   ========================================================= */
:root{
  --bg:#0b1f4b;
  --surface:#0f2a63;
  --surface-2:#12326f;
  --line:rgba(255,255,255,0.16);
  --line-strong:rgba(255,255,255,0.32);
  --grid-line:rgba(255,255,255,0.05);
  --ink:#f3f6ff;
  --ink-muted:#aec0e8;
  --ink-faint:#7c8ec2;
  --amber:#ffb020;
  --cyan:#7fd7ff;
  --ok:#5fe3a1;

  --font-mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;
  --font-sans:'IBM Plex Sans', -apple-system, sans-serif;

  --radius:2px;
  --radius-md:4px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --container:1600px;
  --container-text:900px;
}

[data-theme="light"]{
  --bg:#f4f5f1;
  --surface:#ffffff;
  --surface-2:#eef0ea;
  --line:rgba(11,31,75,0.14);
  --line-strong:rgba(11,31,75,0.28);
  --grid-line:rgba(11,31,75,0.045);
  --ink:#0b1f4b;
  --ink-muted:#4b5875;
  --ink-faint:#8590ac;
  --amber:#c9740f;
  --cyan:#1e5fb0;
  --ok:#1c8a5c;
}

*,*::before,*::after{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background .4s var(--ease), color .4s var(--ease);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}
button{font-family:inherit; cursor:pointer;}
input,textarea,select{font-family:inherit;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important;}
}

.container{width:100%; max-width:var(--container); margin:0 auto; padding:0 clamp(24px,4.5vw,72px);}
.section{padding:120px 0;}
.section-tight{padding:76px 0;}
@media (max-width:768px){.section{padding:76px 0;} .section-tight{padding:52px 0;}}

.mono{font-family:var(--font-mono);}

/* Spec-sheet eyebrow: "FIG. 01 — SERVICES" style callout, not decoration —
   it mirrors how every panel in a real drawing set is indexed. */
.eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px; font-weight:500; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--amber);
  margin-bottom:18px;
}
.eyebrow::before{content:"◆"; font-size:9px;}

.section-head{max-width:640px; margin-bottom:56px;}
.section-head.center{margin-left:auto; margin-right:auto; text-align:center;}
.section-head:not(.center){max-width:var(--container-text);}

h1,h2,h3,h4{font-weight:600; letter-spacing:-0.01em; line-height:1.14; font-family:var(--font-sans);}
.section-title{font-size:44px;}
.card-title{font-size:21px;}
.body-lg{font-size:18.5px; color:var(--ink-muted); line-height:1.65; max-width:var(--container-text);}
.body-text{font-size:15.5px; color:var(--ink-muted);}
@media (max-width:768px){.section-title{font-size:32px;}}

/* =========================================================
   Corner registration marks — the blueprint "signature"
   ========================================================= */
.tick-panel{position:relative;}
.tick-panel::before,.tick-panel::after,
.tick-panel .tick-br,.tick-panel .tick-bl{
  content:"+"; position:absolute; font-family:var(--font-mono);
  font-size:14px; color:var(--ink-faint); line-height:1;
}
.tick-panel::before{top:-7px; left:-7px;}
.tick-panel::after{top:-7px; right:-7px;}
.tick-panel .tick-br{bottom:-7px; right:-7px;}
.tick-panel .tick-bl{bottom:-7px; left:-7px;}

/* =========================================================
   Panels (cards) — schematic component boxes
   ========================================================= */
.panel{
  background:var(--surface);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  padding:30px;
  position:relative;
  transition:border-color .3s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease);
}
.panel:hover{border-color:var(--amber); transform:translateY(-4px); box-shadow:0 20px 40px -24px rgba(0,0,0,0.5);}
.panel-index{
  font-family:var(--font-mono); font-size:11.5px; color:var(--ink-faint);
  letter-spacing:0.06em; margin-bottom:16px; display:block;
}
.panel-icon{
  width:44px; height:44px; border:1px solid var(--line-strong); border-radius:var(--radius);
  display:flex; align-items:center; justify-content:center; color:var(--amber);
  margin-bottom:18px;
}
.panel-icon svg{width:22px; height:22px;}

/* =========================================================
   Buttons — technical / squared
   ========================================================= */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 26px; border-radius:var(--radius);
  font-family:var(--font-mono); font-weight:500; font-size:13.5px; letter-spacing:0.03em; text-transform:uppercase;
  border:1px solid transparent;
  transition:transform .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
  white-space:nowrap;
}
.btn svg{width:16px; height:16px;}
.btn-primary{background:var(--amber); color:#171100; border-color:var(--amber);}
.btn-primary:hover{transform:translateY(-2px); box-shadow:0 12px 26px -8px rgba(255,176,32,0.5);}
.btn-secondary{background:transparent; color:var(--ink); border-color:var(--line-strong);}
.btn-secondary:hover{border-color:var(--cyan); color:var(--cyan); transform:translateY(-2px);}
.btn-block{width:100%;}
.btn-sm{padding:10px 18px; font-size:12px;}

/* =========================================================
   Navbar
   ========================================================= */
.navbar{position:fixed; top:0; left:0; right:0; z-index:1000; padding:20px 0; border-bottom:1px solid transparent; transition:all .3s var(--ease);}
.navbar.scrolled{padding:14px 0; background:rgba(11,31,75,0.85); backdrop-filter:blur(10px); border-bottom:1px solid var(--line);}
[data-theme="light"] .navbar.scrolled{background:rgba(244,245,241,0.88);}
.nav-inner{display:flex; align-items:center; justify-content:space-between; gap:24px;}
.brand{display:flex; align-items:center; gap:10px; font-weight:600; font-size:18px;}
.brand-mark{
  width:32px; height:32px; border:1px solid var(--amber); border-radius:var(--radius);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-mono); font-size:13px; font-weight:600; color:var(--amber);
}
.brand-sub{display:block; font-family:var(--font-mono); font-size:10.5px; font-weight:400; color:var(--ink-faint); letter-spacing:0.02em; text-transform:uppercase;}

.nav-links{display:flex; align-items:center; gap:30px;}
.nav-links a{font-family:var(--font-mono); font-size:12.5px; font-weight:500; letter-spacing:0.02em; text-transform:uppercase; color:var(--ink-muted); position:relative; padding:6px 0; transition:color .25s var(--ease);}
.nav-links a:hover,.nav-links a.active{color:var(--amber);}

.nav-actions{display:flex; align-items:center; gap:12px;}
.theme-toggle{width:36px; height:36px; border-radius:var(--radius); border:1px solid var(--line-strong); background:var(--surface); display:flex; align-items:center; justify-content:center; color:var(--ink-muted); transition:all .25s;}
.theme-toggle:hover{color:var(--amber); border-color:var(--amber);}
.theme-toggle svg{width:17px; height:17px;}
.theme-toggle .icon-sun{display:none;}
[data-theme="light"] .theme-toggle .icon-moon{display:none;}
[data-theme="light"] .theme-toggle .icon-sun{display:block;}

.nav-toggle{display:none; width:36px; height:36px; border-radius:var(--radius); border:1px solid var(--line-strong); background:var(--surface); align-items:center; justify-content:center; color:var(--ink);}
.nav-toggle svg{width:19px; height:19px;}

@media (max-width:900px){
  .nav-links{position:fixed; top:0; right:0; height:100vh; width:min(320px,82vw); background:var(--surface); border-left:1px solid var(--line-strong); flex-direction:column; align-items:flex-start; gap:8px; padding:100px 28px 28px; transform:translateX(100%); transition:transform .4s var(--ease);}
  .nav-links.open{transform:translateX(0);}
  .nav-links a{width:100%; padding:12px 0; font-size:14px;}
  .nav-toggle{display:flex;}
}
@media (max-width:480px){
  .brand-sub{display:none;} .nav-actions{gap:8px;} .nav-actions > a.btn{display:none;}
}

/* =========================================================
   Hero — schematic diagram signature
   ========================================================= */
.hero{padding:180px 0 110px; position:relative;}
.hero-grid{display:grid; grid-template-columns:1.05fr 0.95fr; gap:64px; align-items:center;}
@media (max-width:1000px){.hero-grid{grid-template-columns:1fr; gap:52px;} .hero{padding:140px 0 64px;}}

.hero-stamp{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.06em; text-transform:uppercase;
  padding:8px 14px; border:1px dashed var(--line-strong); border-radius:var(--radius);
  color:var(--ink-muted); margin-bottom:26px;
}
.hero-stamp b{color:var(--ok);}
.hero-stamp .stamp-dot{width:6px; height:6px; border-radius:50%; background:var(--ok);}

.hero h1{font-size:66px; margin-bottom:22px;}
@media (max-width:1000px){.hero h1{font-size:44px;}}
@media (max-width:520px){.hero h1{font-size:34px;}}
.hero .accent{color:var(--amber);}

.hero p.body-lg{margin-bottom:34px;}
.hero-ctas{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:44px;}

.tech-badges{display:flex; flex-wrap:wrap; gap:10px;}
.tech-chip{
  display:inline-flex; align-items:center; gap:6px; padding:7px 13px; border-radius:var(--radius);
  border:1px solid var(--line-strong); font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.02em; color:var(--ink-muted);
  transition:border-color .25s, color .25s;
}
.tech-chip:hover{border-color:var(--amber); color:var(--amber);}

/* Hero diagram: Mahendran as central node, three service outputs */
.diagram-panel{padding:36px; position:relative;}
.diagram-title{font-family:var(--font-mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:28px; display:flex; justify-content:space-between;}
.diagram-svg{width:100%; height:auto; display:block;}
.diagram-svg .node-line{stroke:var(--line-strong); stroke-width:1.5; fill:none; stroke-dasharray:4 4;}
.diagram-svg .node-line.flow{stroke:var(--amber); stroke-dasharray:5 6; animation:dash 2.4s linear infinite;}
@keyframes dash{to{stroke-dashoffset:-22;}}
.diagram-svg .node-core{fill:var(--surface-2); stroke:var(--amber); stroke-width:1.5;}
.diagram-svg .node-out{fill:var(--surface-2); stroke:var(--line-strong); stroke-width:1.5;}
.diagram-svg text{font-family:var(--font-mono); fill:var(--ink); font-size:11px;}
.diagram-svg .label-sub{fill:var(--ink-faint); font-size:9px;}

/* =========================================================
   Grids
   ========================================================= */
.grid-4{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:1px; background:var(--line-strong); border:1px solid var(--line-strong);}
.grid-3{display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:1px; background:var(--line-strong); border:1px solid var(--line-strong);}
.grid-3-fixed{grid-template-columns:repeat(3,1fr);}
@media (max-width:1000px){.grid-3-fixed{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.grid-3-fixed{grid-template-columns:1fr;}}
.grid-2{display:grid; grid-template-columns:repeat(auto-fit,minmax(320px,1fr)); gap:24px;}
.grid-4 .panel, .grid-3 .panel{border:none; border-radius:0; background:var(--bg);}
.grid-4 .panel:hover, .grid-3 .panel:hover{transform:none; box-shadow:none; background:var(--surface);}

/* =========================================================
   Founder
   ========================================================= */
.founder-grid{display:grid; grid-template-columns:0.85fr 1.15fr; gap:64px; align-items:center;}
@media (max-width:900px){.founder-grid{grid-template-columns:1fr; gap:40px;}}
.founder-card{padding:44px; text-align:left;}
.founder-avatar{
  width:64px; height:64px; border:1px solid var(--amber); border-radius:var(--radius);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-mono); font-size:24px; font-weight:600; color:var(--amber);
  margin-bottom:22px;
}
.founder-card h3{font-size:23px; margin-bottom:4px;}
.founder-role{font-family:var(--font-mono); color:var(--amber); font-weight:500; font-size:12.5px; letter-spacing:0.02em; text-transform:uppercase; margin-bottom:4px;}
.founder-loc{color:var(--ink-faint); font-size:13px; margin-bottom:26px; font-family:var(--font-mono);}
.founder-stats{display:flex; flex-wrap:wrap; gap:24px 32px; padding-top:22px; border-top:1px dashed var(--line-strong);}
.founder-stats b{display:block; font-size:22px; font-weight:600; font-family:var(--font-mono);}
.founder-stats span{font-size:11px; color:var(--ink-faint); font-family:var(--font-mono); text-transform:uppercase;}

.founder-copy p{margin-bottom:18px; color:var(--ink-muted); font-size:16px;}
.founder-tags{display:flex; flex-wrap:wrap; gap:10px; margin-top:22px;}
.founder-tags span{padding:7px 13px; border:1px solid var(--line-strong); border-radius:var(--radius); font-family:var(--font-mono); font-size:11.5px; color:var(--ink-muted);}

/* =========================================================
   Services / panels detail
   ========================================================= */
.panel ul{margin-top:14px; display:flex; flex-direction:column; gap:8px;}
.panel ul li{font-size:14px; color:var(--ink-muted); display:flex; align-items:flex-start; gap:8px;}
.panel ul li svg{width:14px; height:14px; color:var(--amber); flex-shrink:0; margin-top:3px;}
.panel p{color:var(--ink-muted); font-size:14.5px; margin-top:6px;}

/* Tech wall */
.tech-wall-group{margin-bottom:32px;}
.tech-wall-group h4{font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:0.06em; color:var(--ink-faint); margin-bottom:14px;}
.tech-wall{display:flex; flex-wrap:wrap; gap:10px;}
.tech-tile{display:flex; align-items:center; gap:9px; padding:12px 16px; border:1px solid var(--line-strong); border-radius:var(--radius); font-family:var(--font-mono); font-size:13px; transition:all .25s;}
.tech-tile:hover{border-color:var(--amber); color:var(--amber);}
.tech-tile .dot{width:6px; height:6px; background:var(--amber);}

/* Case studies */
.case-tag{display:inline-flex; align-self:flex-start; padding:5px 11px; border:1px solid var(--amber); border-radius:var(--radius); font-family:var(--font-mono); font-size:10.5px; letter-spacing:0.03em; text-transform:uppercase; color:var(--amber); margin-bottom:14px;}
.panel.case-card h3{font-size:19px; margin-bottom:8px;}

/* Timeline */
.timeline{display:grid; grid-template-columns:repeat(6,1fr); gap:1px; background:var(--line-strong); border:1px solid var(--line-strong);}
@media (max-width:1000px){.timeline{grid-template-columns:repeat(3,1fr);}}
@media (max-width:640px){.timeline{grid-template-columns:1fr;}}
.timeline-step{padding:26px 20px; background:var(--bg);}
.timeline-num{font-family:var(--font-mono); font-size:12px; font-weight:600; color:var(--amber); letter-spacing:0.04em; margin-bottom:12px; display:block;}
.timeline-step h4{font-size:15.5px; margin-bottom:8px;}
.timeline-step p{font-size:13px; color:var(--ink-muted);}

/* FAQ */
.faq-list{display:flex; flex-direction:column; max-width:820px; margin:0 auto; border:1px solid var(--line-strong); border-top:none;}
.faq-item{border-top:1px solid var(--line-strong);}
.faq-q{display:flex; align-items:center; justify-content:space-between; gap:16px; padding:20px 24px; width:100%; background:transparent; border:none; color:var(--ink); font-size:15px; font-weight:500; text-align:left;}
.faq-q svg{width:18px; height:18px; color:var(--ink-faint); flex-shrink:0; transition:transform .3s var(--ease);}
.faq-item.open .faq-q svg{transform:rotate(45deg); color:var(--amber);}
.faq-a{max-height:0; overflow:hidden; transition:max-height .35s var(--ease), padding .35s var(--ease); padding:0 24px;}
.faq-item.open .faq-a{padding:0 24px 22px;}
.faq-a p{color:var(--ink-muted); font-size:14.5px;}

/* Contact */
.contact-grid{display:grid; grid-template-columns:0.85fr 1.15fr; gap:1px; background:var(--line-strong); border:1px solid var(--line-strong);}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr;}}
.contact-info-card{padding:36px; background:var(--bg);}
.contact-row{display:flex; align-items:center; gap:16px; padding:16px 0; border-bottom:1px dashed var(--line-strong);}
.contact-row:last-child{border-bottom:none;}
.contact-row .panel-icon{margin-bottom:0; width:40px; height:40px;}
.contact-row b{display:block; font-size:14.5px; font-weight:500;}
.contact-row span{font-size:11.5px; color:var(--ink-faint); font-family:var(--font-mono); text-transform:uppercase;}

.tabs{display:flex; gap:8px; margin-bottom:26px; flex-wrap:wrap;}
.tab-btn{padding:10px 16px; border-radius:var(--radius); border:1px solid var(--line-strong); background:transparent; font-family:var(--font-mono); font-size:12px; letter-spacing:0.02em; text-transform:uppercase; color:var(--ink-muted); transition:all .25s;}
.tab-btn.active{background:var(--amber); color:#171100; border-color:var(--amber);}
.tab-panel{display:none;}
.tab-panel.active{display:block;}

.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
@media (max-width:560px){.form-grid{grid-template-columns:1fr;}}
.form-field{display:flex; flex-direction:column; gap:7px; margin-bottom:16px;}
.form-field.full{grid-column:1/-1;}
.form-field label{font-family:var(--font-mono); font-size:11.5px; font-weight:500; letter-spacing:0.02em; text-transform:uppercase; color:var(--ink-muted);}
.form-field input,.form-field select,.form-field textarea{padding:12px 14px; border-radius:var(--radius); border:1px solid var(--line-strong); background:var(--surface); color:var(--ink); font-size:14px; transition:border-color .25s;}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none; border-color:var(--amber);}
.form-field textarea{resize:vertical; min-height:104px;}
.checkbox-group{display:flex; flex-wrap:wrap; gap:9px;}
.checkbox-chip{display:flex; align-items:center; gap:7px; padding:9px 14px; border:1px solid var(--line-strong); border-radius:var(--radius); font-family:var(--font-mono); font-size:12px; color:var(--ink-muted); cursor:pointer; transition:all .25s;}
.checkbox-chip:has(input:checked){border-color:var(--amber); color:var(--amber);}
.form-note{font-family:var(--font-mono); font-size:11.5px; color:var(--ink-faint); margin-top:14px;}
.form-success{display:none; align-items:center; gap:12px; padding:14px 18px; border:1px solid var(--ok); border-radius:var(--radius); color:var(--ok); font-size:13.5px; font-weight:500; margin-bottom:16px;}
.form-success.show{display:flex;}
.form-success svg{width:18px; height:18px; flex-shrink:0;}

/* CTA */
.cta-band{border:1px solid var(--line-strong); border-radius:var(--radius); padding:68px 52px; text-align:center; position:relative;}
.cta-band h2{font-size:34px; margin-bottom:14px;}
.cta-band p{color:var(--ink-muted); max-width:520px; margin:0 auto 30px; font-size:16px;}
.cta-actions{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}
@media (max-width:640px){.cta-band{padding:44px 22px;} .cta-band h2{font-size:26px;}}

/* Footer */
.footer{border-top:1px solid var(--line-strong); padding:60px 0 30px; margin-top:56px;}
.footer-grid{display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; margin-bottom:44px;}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr; row-gap:32px;}}
@media (max-width:480px){.footer-grid{grid-template-columns:1fr;}}
.footer-brand p{color:var(--ink-muted); font-size:13.5px; margin-top:14px; max-width:280px;}
.footer h5{font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:0.05em; color:var(--ink-faint); margin-bottom:16px;}
.footer-links{display:flex; flex-direction:column; gap:11px;}
.footer-links a{font-size:14px; color:var(--ink-muted); transition:color .25s;}
.footer-links a:hover{color:var(--amber);}
.footer-bottom{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; padding-top:24px; border-top:1px solid var(--line-strong); font-family:var(--font-mono); font-size:11.5px; color:var(--ink-faint);}

/* WhatsApp float */
.whatsapp-float{position:fixed; bottom:26px; right:26px; z-index:900; width:54px; height:54px; border-radius:var(--radius); background:var(--amber); color:#171100; display:flex; align-items:center; justify-content:center; box-shadow:0 12px 26px -8px rgba(255,176,32,0.55); transition:transform .3s var(--ease);}
.whatsapp-float:hover{transform:scale(1.06);}
.whatsapp-float svg{width:26px; height:26px;}

/* Reveal */
[data-reveal]{opacity:0; transform:translateY(24px); transition:opacity .6s var(--ease), transform .6s var(--ease);}
[data-reveal].in-view{opacity:1; transform:translateY(0);}
[data-reveal-delay="1"]{transition-delay:.06s;}
[data-reveal-delay="2"]{transition-delay:.12s;}
[data-reveal-delay="3"]{transition-delay:.18s;}
[data-reveal-delay="4"]{transition-delay:.24s;}
[data-reveal-delay="5"]{transition-delay:.3s;}

.skip-link{position:absolute; left:-999px; top:auto; background:var(--amber); color:#171100; padding:12px 20px; border-radius:2px; z-index:2000;}
.skip-link:focus{left:16px; top:16px;}
:focus-visible{outline:2px solid var(--amber); outline-offset:3px;}