/* ============================================
   Sajjad Ahmad Khan — Design System
   Bold / dark / condensed display + lime accent
   ============================================ */

:root{
  --bg:          #0D0D0D;
  --bg-alt:      #151515;
  --bg-card:     #1A1A1A;
  --lime:        #D4FF3F;
  --lime-dim:    #9FBF2E;
  --ink:         #F5F5F5;
  --ink-dim:     #C9C9C9;
  --muted:       #8C8C8C;
  --border:      #2A2A2A;

  --font-display: 'Anton', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --container: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;margin:0;padding:0;}

.wrap{max-width:var(--container);margin:0 auto;padding:0 32px;}

.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--lime);
  margin-bottom:18px;
  display:inline-block;
}

h1,h2,h3{
  font-family:var(--font-display);
  font-weight:400;
  text-transform:uppercase;
  line-height:1.02;
  margin:0;
  letter-spacing:0.01em;
}
h1{font-size:clamp(48px,8vw,96px);}
h2{font-size:clamp(30px,4vw,48px);}
h3{font-size:20px;}
p{color:var(--ink-dim);}
.muted{color:var(--muted);}

header.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(13,13,13,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 0;
}
.logo-lockup{display:flex;align-items:center;gap:12px;}
.logo-name{
  font-family:var(--font-display);
  font-size:20px;
  letter-spacing:0.03em;
  color:var(--ink);
}
nav.main-nav ul{display:flex;gap:28px;flex-wrap:wrap;}
nav.main-nav a{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-dim);
  transition:color .15s;
}
nav.main-nav a:hover, nav.main-nav a.active{color:var(--lime);}
.nav-cta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  border:1px solid var(--lime);
  color:var(--lime);
  padding:10px 20px;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--lime);color:#0D0D0D;}
.nav-toggle{display:none;background:none;border:none;color:var(--ink);font-size:26px;cursor:pointer;}

@media (max-width:900px){
  nav.main-nav{display:none;}
  .nav-toggle{display:block;}
  .nav-cta{padding:8px 14px;}
}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:13px;letter-spacing:0.1em;text-transform:uppercase;
  padding:16px 28px;
  border:1px solid var(--ink);
  color:var(--ink);
  transition:all .15s;
}
.btn:hover{background:var(--ink);color:#0D0D0D;}
.btn-lime{border-color:var(--lime);color:var(--lime);}
.btn-lime:hover{background:var(--lime);color:#0D0D0D;}
.btn-solid{background:var(--lime);color:#0D0D0D;border-color:var(--lime);}
.btn-solid:hover{background:transparent;color:var(--lime);}

.cut-wedge{
  position:absolute;
  background:var(--lime);
  clip-path:polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.hero{
  position:relative;
  overflow:hidden;
  padding:100px 0 70px;
  border-bottom:1px solid var(--border);
}
.hero .cut-wedge{
  width:22%;height:130%;
  top:-15%;right:-2%;
  opacity:1;
  z-index:0;
  overflow:hidden;
}
.signal-ripple{
  position:absolute;
  left:50%;top:50%;
  width:36px;height:36px;
  margin:-18px 0 0 -18px;
  border-radius:50%;
  border:3px solid rgba(13,13,13,0.5);
  opacity:0;
  animation:ripple 3.2s ease-out infinite;
}
.signal-ripple.r2{animation-delay:1.05s;}
.signal-ripple.r3{animation-delay:2.1s;}
@keyframes ripple{
  0%{transform:scale(0.3); opacity:0.6;}
  100%{transform:scale(9); opacity:0;}
}
.highway-lane{
  position:absolute;left:50%;top:0;bottom:0;width:4px;margin-left:-2px;
  background-image:repeating-linear-gradient(to bottom, rgba(13,13,13,0.55) 0 18px, transparent 18px 38px);
  animation:laneScroll 1s linear infinite;
}
@keyframes laneScroll{
  from{background-position:0 0;}
  to{background-position:0 -38px;}
}
.highway-car{
  position:absolute;
  width:10px;height:22px;
  border-radius:3px;
  background:linear-gradient(180deg, rgba(235,235,235,0.95) 0%, rgba(20,20,20,0.9) 45%, rgba(13,13,13,0.92) 100%);
  box-shadow:0 0 5px rgba(212,255,63,0.5);
  animation:carMoveUp 4.5s linear infinite;
}
.highway-car::before{
  content:'';
  position:absolute;
  top:3px;left:1.5px;right:1.5px;height:5px;
  background:rgba(255,255,255,0.6);
  border-radius:2px;
}
.v2v-beam{
  position:absolute;
  border-radius:50%;
  border:2px solid rgba(255,255,255,0.9);
  box-shadow:0 0 8px rgba(255,255,255,0.5);
  pointer-events:none;
  z-index:2;
  opacity:0;
}
@keyframes carMoveUp{
  0%{bottom:-8%; opacity:0;}
  8%{opacity:1;}
  92%{opacity:1;}
  100%{bottom:108%; opacity:0;}
}
.hero-content{position:relative;z-index:2;max-width:760px;}
.hero h1{margin-bottom:28px;}
.hero-lede{font-size:18px;max-width:560px;margin-bottom:44px;}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}

.hero-signal{
  position:absolute;right:6%;top:50%;
  transform:translateY(-50%);
  z-index:1;
  opacity:0.9;
}

.stats-bar{
  border-bottom:1px solid var(--border);
  background:var(--bg-alt);
}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  padding:56px 0;
}
.stat{text-align:center;border-left:1px solid var(--border);padding:0 20px;}
.stat:first-child{border-left:none;}
.stat-num{
  font-family:var(--font-display);
  font-size:clamp(36px,4.5vw,56px);
  color:var(--lime);
  line-height:1;
}
.stat-label{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:0.12em;text-transform:uppercase;
  color:var(--muted);margin-top:10px;
}
@media (max-width:700px){
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 0;}
  .stat{border-left:none;}
}

section{padding:110px 0;border-bottom:1px solid var(--border);}
section:last-of-type{border-bottom:none;}
.section-head{max-width:640px;margin-bottom:64px;}
.section-head p{margin-top:18px;font-size:16px;}

.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;}
.card{
  background:var(--bg-card);
  border:1px solid var(--border);
  padding:36px 30px;
  position:relative;
  overflow:hidden;
  transition:border-color .15s;
}
.card:hover{border-color:var(--lime);}
.card .card-eyebrow{
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.1em;
  text-transform:uppercase;color:var(--lime);margin-bottom:14px;display:block;
}
.card h3{margin-bottom:12px;}
.card p{font-size:14px;margin:0;}

.pub-row{
  display:flex;justify-content:space-between;gap:24px;
  padding:28px 0;border-bottom:1px solid var(--border);
  flex-wrap:wrap;
}
.pub-row:last-child{border-bottom:none;}
.pub-title{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.pub-meta{font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:0.02em;}
.pub-year{
  font-family:var(--font-display);font-size:28px;color:var(--lime);
  min-width:70px;
}

.cta-banner{
  background:var(--lime);
  color:#0D0D0D;
  padding:90px 0;
  text-align:center;
}
.cta-banner h2{color:#0D0D0D;margin-bottom:24px;}
.cta-banner .btn{border-color:#0D0D0D;color:#0D0D0D;}
.cta-banner .btn:hover{background:#0D0D0D;color:var(--lime);}

footer.site-footer{padding:70px 0 40px;}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:50px;border-bottom:1px solid var(--border);
}
.footer-col h4{
  font-family:var(--font-mono);font-size:12px;letter-spacing:0.1em;
  text-transform:uppercase;color:var(--muted);margin-bottom:18px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--ink-dim);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  padding-top:30px;flex-wrap:wrap;gap:14px;
  font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:0.04em;
}
@media (max-width:800px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}

/* ---------- Hero background photos (full-bleed, covers entire hero) ---------- */
.hero-bg-layer{position:absolute;inset:0;z-index:0;}
.bg-slide{position:absolute;inset:0;opacity:0;transition:opacity 1s ease;}
.bg-slide.active{opacity:1;}
.bg-slide img{
  width:100%;height:100%;object-fit:cover;object-position:center;
  filter:grayscale(55%) brightness(0.42) contrast(1.12);
}
.bg-slide::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg, var(--bg) 22%, rgba(13,13,13,0.82) 52%, rgba(13,13,13,0.4) 100%);
}
.hero .cut-wedge{z-index:1;}
.hero-signal{
  position:absolute;left:46%;top:6%;
  z-index:2;
  opacity:0.9;
  pointer-events:none;
}
.hero-slider, .slider-controls{position:relative;z-index:3;}

@keyframes drawArc{ to{stroke-dashoffset:0;} }
@keyframes pulseGlow{ 0%,100%{opacity:0.9;} 50%{opacity:0.35;} }
.hero-signal path{stroke-dasharray:100; stroke-dashoffset:100;}
.hero-signal path:nth-of-type(1){animation:drawArc 1s cubic-bezier(.4,0,.2,1) forwards, pulseGlow 2.6s ease-in-out infinite; animation-delay:.2s, 1.2s;}
.hero-signal path:nth-of-type(2){animation:drawArc 1s cubic-bezier(.4,0,.2,1) forwards, pulseGlow 2.8s ease-in-out infinite; animation-delay:.4s, 1.4s;}
.hero-signal path:nth-of-type(3){animation:drawArc 1s cubic-bezier(.4,0,.2,1) forwards, pulseGlow 3s ease-in-out infinite; animation-delay:.6s, 1.6s;}
.hero-signal path:nth-of-type(4){animation:drawArc 1s cubic-bezier(.4,0,.2,1) forwards, pulseGlow 3.2s ease-in-out infinite; animation-delay:.8s, 1.8s;}
.hero-signal circle{animation:fadeUp .5s ease forwards; opacity:0;}

/* ---------- Motion ---------- */
@keyframes fadeUp{ from{opacity:0; transform:translateY(24px);} to{opacity:1; transform:translateY(0);} }
.slide-content .eyebrow{animation:fadeUp .7s ease forwards; opacity:0; animation-delay:.1s;}
.slide-content h1{animation:fadeUp .8s ease forwards; opacity:0; animation-delay:.25s;}
.slide-content .hero-lede{animation:fadeUp .8s ease forwards; opacity:0; animation-delay:.45s;}
.slide-content .hero-actions{animation:fadeUp .8s ease forwards; opacity:0; animation-delay:.6s;}

.reveal{opacity:0; transform:translateY(30px); transition:opacity .7s ease, transform .7s ease;}
.reveal.in-view{opacity:1; transform:translateY(0);}

.card{transition:border-color .2s, transform .3s ease, box-shadow .3s ease;}
.card:hover{transform:translateY(-6px); box-shadow:0 16px 34px -14px rgba(212,255,63,0.28);}

nav.main-nav a{position:relative;}
nav.main-nav a::after{
  content:'';position:absolute;left:0;bottom:-6px;width:100%;height:1px;
  background:var(--lime);transform:scaleX(0);transform-origin:right;transition:transform .25s ease;
}
nav.main-nav a:hover::after, nav.main-nav a.active::after{transform:scaleX(1);transform-origin:left;}

.btn{transition:all .2s ease;}
.btn-solid:hover, .btn-lime:hover{transform:translateY(-2px);}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important;}
}

/* ---------- Hero slider ---------- */
.hero-slider{position:relative;min-height:420px;}
.slide{
  position:absolute;inset:0;
  opacity:0;pointer-events:none;
  transition:opacity .6s ease;
}
.slide.active{opacity:1;pointer-events:auto;position:relative;z-index:2;}
.slide-content{position:relative;z-index:2;max-width:min(640px, 60%);padding:0 0 60px;}
.slide-content h1{margin-bottom:28px;}
.slide-content .eyebrow{display:inline-block;}

.slider-controls{
  position:relative;z-index:3;
  display:flex;align-items:center;gap:20px;
  margin-top:16px;
}
.slider-arrow{
  background:none;border:1px solid var(--border);color:var(--ink-dim);
  width:42px;height:42px;border-radius:50%;cursor:pointer;font-size:16px;
  display:flex;align-items:center;justify-content:center;
  transition:all .2s ease;flex-shrink:0;
}
.slider-arrow:hover{border-color:var(--lime);color:var(--lime);}
.slider-dots{display:flex;gap:10px;}
.dot{
  width:8px;height:8px;border-radius:50%;background:var(--border);
  border:none;cursor:pointer;transition:all .25s ease;padding:0;
}
.dot.active{background:var(--lime);width:28px;border-radius:4px;}

/* ---------- News cards ---------- */
.news-card{
  background:var(--bg-card);border:1px solid var(--border);
  padding:30px;transition:border-color .2s, transform .3s ease;
}
.news-card:hover{border-color:var(--lime);transform:translateY(-4px);}

/* ---------- Blog cards ---------- */
.blog-card{
  background:var(--bg-card);border:1px solid var(--border);padding:0;overflow:hidden;
  transition:border-color .2s, transform .3s ease;display:flex;flex-direction:column;
}
.blog-card:hover{border-color:var(--lime);transform:translateY(-6px);}
.blog-card-body{padding:30px;}
.blog-card .blog-date{font-family:var(--font-mono);font-size:11px;letter-spacing:0.1em;text-transform:uppercase;color:var(--lime);margin-bottom:14px;display:block;}
.blog-card h3{margin-bottom:12px;font-size:19px;}
.blog-card p{font-size:14px;margin:0;}
.news-date{font-family:var(--font-mono);font-size:11px;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);margin-bottom:14px;display:block;}
.news-card h3{font-size:18px;margin-bottom:10px;}
.news-card p{font-size:14px;margin:0;}

/* ---------- Profile cards ---------- */
.profile-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;}
.profile-card{
  background:var(--bg-card);border:1px solid var(--border);
  padding:26px;text-align:center;transition:border-color .2s, transform .3s ease;
}
.profile-card:hover{border-color:var(--lime);transform:translateY(-4px);}
.profile-card .platform{font-family:var(--font-mono);font-size:12px;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:10px;}
.profile-card .metric{font-family:var(--font-display);font-size:30px;color:var(--lime);}
.profile-card .metric-label{font-size:11px;color:var(--muted);font-family:var(--font-mono);letter-spacing:0.06em;text-transform:uppercase;margin-top:4px;}

/* ---------- Project teaser ---------- */
.project-teaser{
  background:var(--bg-card);border:1px solid var(--border);
  padding:48px;display:flex;justify-content:space-between;align-items:center;
  gap:24px;flex-wrap:wrap;
}
.project-teaser .status{
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.1em;text-transform:uppercase;
  color:var(--lime);border:1px solid var(--lime);padding:6px 14px;border-radius:20px;
}

@media (max-width:700px){
  .hero-slider{min-height:460px;}
}

/* ---------- Photo grid ---------- */
.photo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.photo-tile{
  position:relative;overflow:hidden;aspect-ratio:4/5;
  background:var(--bg-card);border:1px solid var(--border);
}
.photo-tile img{
  width:100%;height:100%;object-fit:cover;display:block;
  filter:grayscale(100%) contrast(1.1) brightness(0.75);
  transition:filter .4s ease, transform .4s ease;
}
.photo-tile:hover img{filter:grayscale(0%) contrast(1.05) brightness(0.85);transform:scale(1.04);}
.photo-tile::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(13,13,13,0) 35%, rgba(13,13,13,0.92) 100%);
  pointer-events:none;
}
.photo-caption{position:absolute;bottom:22px;left:22px;right:22px;z-index:2;}
.photo-caption .tag{
  font-family:var(--font-mono);font-size:10px;letter-spacing:0.1em;text-transform:uppercase;
  color:var(--lime);display:block;margin-bottom:6px;
}
.photo-caption .desc{font-size:13px;color:var(--ink-dim);line-height:1.4;}
@media (max-width:900px){
  .photo-grid{grid-template-columns:repeat(2,1fr);}
}


/* ---------- Extra components for interior pages ---------- */
.page-hero{padding:150px 0 60px;border-bottom:1px solid var(--border);}
.page-hero .eyebrow{margin-bottom:20px;}
.page-hero-photo{position:relative;height:280px;overflow:hidden;border-bottom:1px solid var(--border);}
.page-hero-photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(55%) brightness(0.45) contrast(1.1);}
.page-hero-photo::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg, rgba(13,13,13,0.2) 0%, rgba(13,13,13,0.95) 100%);}
.page-hero-photo .wrap{position:relative;z-index:2;height:100%;display:flex;align-items:flex-end;padding-bottom:36px;}
.timeline{border-left:2px solid var(--border);padding-left:32px;}
.timeline-item{position:relative;padding-bottom:44px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{content:'';position:absolute;left:-38px;top:5px;width:10px;height:10px;border-radius:50%;background:var(--lime);}
.timeline-year{font-family:var(--font-mono);font-size:12px;color:var(--lime);letter-spacing:0.08em;margin-bottom:8px;text-transform:uppercase;}
.timeline-item h3{margin-bottom:8px;}
.timeline-item p{font-size:14px;margin:0;}
.placeholder-note{border:1px dashed var(--border);background:var(--bg-alt);padding:26px 30px;font-family:var(--font-mono);font-size:13px;color:var(--muted);line-height:1.8;}
.placeholder-note strong{color:var(--ink-dim);}
.patent-card{background:var(--bg-card);border:1px solid var(--border);padding:38px;margin-bottom:24px;}
.patent-card .patent-tag{font-family:var(--font-mono);font-size:11px;color:var(--lime);letter-spacing:0.08em;margin-bottom:14px;display:block;text-transform:uppercase;}
.patent-card h3{margin-bottom:12px;font-size:22px;}
.patent-card p{font-size:14px;margin:0;}
.simple-list{list-style:none;padding:0;margin:0;}
.simple-list li{padding:20px 0;border-bottom:1px solid var(--border);font-size:15px;color:var(--ink-dim);}
.simple-list li:last-child{border-bottom:none;}
.simple-list li strong{color:var(--ink);font-family:var(--font-mono);font-size:12px;letter-spacing:0.06em;text-transform:uppercase;display:block;margin-bottom:4px;color:var(--lime);}
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;}
@media (max-width:800px){.contact-grid{grid-template-columns:1fr;}}
.contact-info-item{margin-bottom:32px;}
.contact-info-item .label{font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--lime);margin-bottom:8px;display:block;}
.contact-info-item .value{font-size:16px;color:var(--ink);}
.contact-form{display:flex;flex-direction:column;gap:20px;}
.contact-form label{font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted);margin-bottom:8px;display:block;}
.contact-form input, .contact-form textarea{width:100%;background:var(--bg-card);border:1px solid var(--border);color:var(--ink);padding:14px 16px;font-family:var(--font-body);font-size:14px;}
.contact-form input:focus, .contact-form textarea:focus{outline:none;border-color:var(--lime);}
.contact-form textarea{min-height:140px;resize:vertical;}
.pub-group-label{font-family:var(--font-mono);font-size:13px;letter-spacing:0.1em;text-transform:uppercase;color:var(--lime);margin:48px 0 16px;}
.pub-group-label:first-child{margin-top:0;}
a.pub-row{transition:border-color .15s;}
a.pub-row .pub-title{transition:color .15s;}
a.pub-row:hover .pub-title{color:var(--lime);}
.blog-post-body{max-width:720px;font-size:16px;line-height:1.85;}
.blog-post-body p{color:var(--ink-dim);margin-bottom:24px;}
.blog-post-body h2{font-size:26px;margin:44px 0 18px;}