:root{
  --bg:#061016;
  --bg-2:#0a171e;
  --bg-3:#101b22;
  --surface:#101b22;
  --surface-2:#14222b;
  --text:#f3f7f5;
  --muted:#aebdc0;
  --muted-2:#789096;
  --green:#85d933;
  --green-2:#5fb719;
  --line:rgba(133,217,51,.24);
  --white-line:rgba(255,255,255,.12);
  --shadow:0 22px 70px rgba(0,0,0,.38);
  --radius:22px;
  --max:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 8% 0%, rgba(133,217,51,.13), transparent 28%),
    linear-gradient(180deg, #061016 0%, #07131a 48%, #081116 100%);
  line-height:1.6;
}

img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
button,input,textarea,select{font:inherit}
::selection{background:rgba(133,217,51,.32)}

.container{
  width:min(var(--max), calc(100% - 40px));
  margin-inline:auto;
}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(6,16,22,.78);
  backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(255,255,255,.08);
}

.nav{
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.brand{
  display:flex;
  align-items:center;
  gap:13px;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
  font-size:.95rem;
}

.brand img{
  width:54px;
  height:54px;
  object-fit:contain;
  filter:drop-shadow(0 0 14px rgba(133,217,51,.12));
}

.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
}

.nav-links a{
  color:var(--muted);
  font-size:.95rem;
  font-weight:650;
  transition:.2s ease;
}

.nav-links a:hover,
.nav-links a.active{color:var(--green)}

.mobile-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--white-line);
  border-radius:12px;
  background:rgba(255,255,255,.04);
  color:var(--text);
}

.mobile-toggle span{
  display:block;
  width:20px;
  height:2px;
  margin:5px auto;
  background:currentColor;
  border-radius:2px;
}

.hero{
  position:relative;
  min-height:720px;
  display:grid;
  align-items:center;
  overflow:hidden;
  isolation:isolate;
}

.hero.compact{
  min-height:520px;
}

.hero-bg{
  position:absolute;
  inset:0;
  z-index:-2;
}

.hero-bg img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.hero-bg:after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg, rgba(4,11,15,.96) 0%, rgba(4,11,15,.78) 38%, rgba(4,11,15,.30) 70%, rgba(4,11,15,.72) 100%),
    linear-gradient(0deg, rgba(6,16,22,1) 0%, transparent 34%);
}

.hero-grid{
  position:absolute;
  inset:0;
  z-index:-1;
  opacity:.32;
  background-image:
    linear-gradient(rgba(133,217,51,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(133,217,51,.10) 1px, transparent 1px);
  background-size:52px 52px;
  mask-image:linear-gradient(90deg, #000 0%, transparent 72%);
}

.hero-content{
  width:min(760px, 100%);
  padding:108px 0 84px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--green);
  font-weight:800;
  letter-spacing:.18em;
  text-transform:uppercase;
  font-size:.78rem;
  margin-bottom:18px;
}

.eyebrow:before{
  content:"";
  width:42px;
  height:2px;
  background:var(--green);
  box-shadow:0 0 18px rgba(133,217,51,.62);
}

h1,h2,h3,p{margin-top:0}
h1{
  font-size:clamp(2.65rem, 5.5vw, 5.25rem);
  line-height:.98;
  letter-spacing:-.055em;
  margin-bottom:24px;
  max-width:900px;
}

h1 span, h2 span{color:var(--green)}
.hero p{
  max-width:690px;
  color:#d1dddf;
  font-size:clamp(1.04rem, 1.4vw, 1.25rem);
  margin-bottom:34px;
}

.actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:center;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:52px;
  padding:0 22px;
  border-radius:999px;
  font-weight:800;
  font-size:.94rem;
  border:1px solid transparent;
  transition:.2s ease;
}

.btn.primary{
  background:linear-gradient(135deg, var(--green), #61bc20);
  color:#071015;
  box-shadow:0 18px 40px rgba(133,217,51,.20);
}

.btn.secondary{
  border-color:rgba(133,217,51,.42);
  color:var(--text);
  background:rgba(255,255,255,.04);
}

.btn:hover{transform:translateY(-2px)}
.btn.primary:hover{box-shadow:0 22px 50px rgba(133,217,51,.30)}

.metrics-strip{
  margin-top:54px;
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:1px;
  max-width:880px;
  border:1px solid var(--white-line);
  background:rgba(255,255,255,.08);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
}

.metric{
  background:rgba(8,18,24,.76);
  padding:24px 22px;
}

.metric strong{
  display:block;
  font-size:1.7rem;
  line-height:1;
  color:var(--green);
  margin-bottom:9px;
}

.metric span{
  color:var(--muted);
  font-size:.9rem;
}

.section{
  padding:94px 0;
}

.section.tight{padding:66px 0}
.section.alt{
  background:
    radial-gradient(circle at 100% 10%, rgba(133,217,51,.08), transparent 30%),
    linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.01));
  border-top:1px solid rgba(255,255,255,.06);
  border-bottom:1px solid rgba(255,255,255,.06);
}

.section-head{
  max-width:820px;
  margin-bottom:42px;
}

.section-head.center{text-align:center; margin-inline:auto}
.section-head h2{
  font-size:clamp(2rem, 4vw, 3.25rem);
  line-height:1.05;
  letter-spacing:-.045em;
  margin-bottom:18px;
}
.section-head p{
  color:var(--muted);
  font-size:1.07rem;
}

.grid{
  display:grid;
  gap:22px;
}

.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{
  position:relative;
  padding:28px;
  background:linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.026));
  border:1px solid var(--white-line);
  border-radius:var(--radius);
  box-shadow:0 18px 48px rgba(0,0,0,.19);
  overflow:hidden;
}

.card:before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  pointer-events:none;
  background:linear-gradient(135deg, rgba(133,217,51,.14), transparent 44%);
  opacity:.55;
}

.card > *{position:relative}
.icon{
  width:48px;
  height:48px;
  border:1px solid var(--line);
  border-radius:16px;
  display:grid;
  place-items:center;
  color:var(--green);
  background:rgba(133,217,51,.07);
  margin-bottom:20px;
}

.icon svg{
  width:25px;
  height:25px;
  stroke:currentColor;
  fill:none;
  stroke-width:2.1;
  stroke-linecap:round;
  stroke-linejoin:round;
}

.card h3{
  font-size:1.25rem;
  line-height:1.2;
  margin-bottom:10px;
}

.card p{
  color:var(--muted);
  margin-bottom:0;
}

.split{
  display:grid;
  grid-template-columns:.95fr 1.05fr;
  gap:42px;
  align-items:center;
}

.visual-card{
  border-radius:30px;
  overflow:hidden;
  border:1px solid var(--white-line);
  box-shadow:var(--shadow);
  min-height:430px;
  background:var(--surface);
}

.visual-card img{
  width:100%;
  height:100%;
  min-height:430px;
  object-fit:cover;
}

.check-list{
  list-style:none;
  padding:0;
  margin:26px 0 0;
  display:grid;
  gap:14px;
}

.check-list li{
  display:flex;
  gap:12px;
  color:#d8e4e6;
}

.check-list li:before{
  content:"";
  flex:0 0 20px;
  width:20px;
  height:20px;
  margin-top:2px;
  border-radius:50%;
  background:rgba(133,217,51,.14);
  border:1px solid rgba(133,217,51,.42);
  box-shadow:inset 0 0 0 5px rgba(133,217,51,.13);
}

.product{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:22px;
  padding:32px;
}

.product .badge{
  width:62px;
  height:62px;
  border-radius:20px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg, rgba(133,217,51,.22), rgba(133,217,51,.04));
  border:1px solid var(--line);
  color:var(--green);
  font-weight:900;
  font-size:1.3rem;
}

.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}

.tag{
  padding:7px 11px;
  border-radius:999px;
  border:1px solid rgba(133,217,51,.26);
  color:#dbe9de;
  background:rgba(133,217,51,.06);
  font-size:.85rem;
  font-weight:650;
}

.comparison{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:14px;
}

.compare-item{
  padding:24px;
  border-radius:20px;
  background:#0e1a21;
  border:1px solid var(--white-line);
}

.compare-item strong{
  display:block;
  color:#fff;
  margin-bottom:8px;
}

.compare-item p{
  color:var(--muted);
  margin:0;
  font-size:.94rem;
}

.cta{
  padding:58px;
  border-radius:32px;
  background:
    radial-gradient(circle at 90% 0%, rgba(133,217,51,.19), transparent 38%),
    linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.025));
  border:1px solid var(--white-line);
  box-shadow:var(--shadow);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:30px;
}

.cta h2{margin-bottom:12px}
.cta p{color:var(--muted); margin-bottom:0; max-width:700px}

.page-intro{
  max-width:880px;
}

.tech-flow{
  display:grid;
  grid-template-columns:repeat(6, minmax(0, 1fr));
  gap:12px;
}

.flow-step{
  position:relative;
  padding:22px 18px;
  border:1px solid var(--white-line);
  background:rgba(255,255,255,.04);
  border-radius:18px;
}

.flow-step small{
  color:var(--green);
  font-weight:900;
  letter-spacing:.12em;
}

.flow-step h3{
  font-size:1rem;
  margin:8px 0 0;
}

.faq{
  display:grid;
  gap:12px;
}

.faq-item{
  border:1px solid var(--white-line);
  border-radius:18px;
  overflow:hidden;
  background:rgba(255,255,255,.035);
}

.faq-question{
  width:100%;
  text-align:left;
  color:var(--text);
  background:transparent;
  border:0;
  padding:20px 22px;
  display:flex;
  justify-content:space-between;
  gap:18px;
  cursor:pointer;
  font-weight:800;
}

.faq-question span:last-child{
  color:var(--green);
  font-size:1.2rem;
}

.faq-answer{
  display:none;
  padding:0 22px 22px;
  color:var(--muted);
}

.faq-item.open .faq-answer{display:block}

.contact-layout{
  display:grid;
  grid-template-columns:.82fr 1.18fr;
  gap:34px;
  align-items:start;
}

.contact-card{
  padding:32px;
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.026));
  border:1px solid var(--white-line);
  border-radius:var(--radius);
}

.contact-detail{
  display:grid;
  gap:18px;
  margin-top:24px;
}

.contact-detail div{
  padding:18px;
  border-radius:16px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
}

.contact-detail small{
  display:block;
  color:var(--green);
  font-weight:900;
  letter-spacing:.1em;
  text-transform:uppercase;
  margin-bottom:4px;
}

.contact-detail a,
.contact-detail span{
  color:#f3f7f5;
  font-weight:720;
}

.form{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}

.form .full{grid-column:1/-1}

.field label{
  display:block;
  color:#d9e6e8;
  font-weight:750;
  margin-bottom:7px;
}

.field input,
.field textarea,
.field select{
  width:100%;
  border:1px solid rgba(255,255,255,.13);
  background:#0b151b;
  color:var(--text);
  border-radius:14px;
  padding:14px 14px;
  outline:none;
}

.field input:focus,
.field textarea:focus,
.field select:focus{
  border-color:rgba(133,217,51,.70);
  box-shadow:0 0 0 4px rgba(133,217,51,.10);
}

.field textarea{
  min-height:150px;
  resize:vertical;
}

.form-note{
  grid-column:1/-1;
  color:var(--muted-2);
  font-size:.9rem;
}

.site-footer{
  padding:42px 0;
  border-top:1px solid rgba(255,255,255,.08);
  background:#050c11;
}

.footer-inner{
  display:flex;
  justify-content:space-between;
  gap:22px;
  color:var(--muted-2);
  font-size:.92rem;
}

.footer-links{
  display:flex;
  gap:20px;
}

.footer-links a:hover{color:var(--green)}

@media (max-width: 980px){
  .metrics-strip,
  .grid.three,
  .grid.four,
  .comparison,
  .tech-flow{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
  .split,
  .contact-layout{
    grid-template-columns:1fr;
  }
  .cta{align-items:flex-start; flex-direction:column}
}

@media (max-width: 760px){
  .container{width:min(100% - 28px, var(--max))}
  .mobile-toggle{display:block}
  .nav-links{
    position:absolute;
    top:76px;
    left:0;
    right:0;
    padding:18px 20px 24px;
    background:rgba(6,16,22,.98);
    border-bottom:1px solid var(--white-line);
    flex-direction:column;
    align-items:flex-start;
    display:none;
  }
  .nav-links.open{display:flex}
  .hero{min-height:650px}
  .hero-content{padding:82px 0 70px}
  .metrics-strip,
  .grid.two,
  .grid.three,
  .grid.four,
  .comparison,
  .tech-flow,
  .form{
    grid-template-columns:1fr;
  }
  .product{grid-template-columns:1fr}
  .section{padding:70px 0}
  .cta{padding:34px}
  .footer-inner{flex-direction:column}
}


.origin-panel{
  display:grid;
  grid-template-columns:.88fr 1.12fr;
  gap:34px;
  align-items:stretch;
}

.origin-mark{
  min-height:360px;
  border-radius:30px;
  border:1px solid var(--white-line);
  background:
    radial-gradient(circle at 70% 18%, rgba(133,217,51,.18), transparent 24%),
    linear-gradient(135deg, rgba(255,255,255,.07), rgba(255,255,255,.025));
  position:relative;
  overflow:hidden;
  display:grid;
  place-items:center;
  box-shadow:var(--shadow);
}

.origin-mark img{
  width:min(62%, 260px);
  opacity:.88;
  filter:drop-shadow(0 24px 80px rgba(133,217,51,.13));
}

.origin-mark:before{
  content:"IIT BOMBAY";
  position:absolute;
  left:28px;
  top:26px;
  color:var(--green);
  font-size:.78rem;
  font-weight:900;
  letter-spacing:.18em;
}

.origin-mark:after{
  content:"SINE · BATTERY MATERIALS · MAHARASHTRA";
  position:absolute;
  left:28px;
  right:28px;
  bottom:26px;
  color:var(--muted-2);
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.12em;
}

.awards-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}

.award-card{
  padding:24px;
  border-radius:20px;
  background:rgba(255,255,255,.045);
  border:1px solid var(--white-line);
}

.award-year{
  display:inline-flex;
  min-width:58px;
  height:34px;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  background:rgba(133,217,51,.10);
  border:1px solid rgba(133,217,51,.30);
  color:var(--green);
  font-weight:900;
  margin-bottom:16px;
}

.award-card h3{
  font-size:1.08rem;
  line-height:1.25;
  margin-bottom:9px;
}

.award-card p{
  color:var(--muted);
  margin-bottom:0;
  font-size:.94rem;
}

.leadership-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}

.leader-card{
  display:grid;
  grid-template-columns:210px 1fr;
  gap:26px;
  align-items:center;
  padding:26px;
}

.leader-photo{
  aspect-ratio: 4 / 4.8;
  border-radius:24px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background:#101b22;
}

.leader-photo img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.role{
  color:var(--green);
  font-weight:900;
  letter-spacing:.08em;
  text-transform:uppercase;
  font-size:.78rem;
  margin-bottom:10px;
}

@media (max-width: 980px){
  .origin-panel,
  .leadership-grid,
  .leader-card{
    grid-template-columns:1fr;
  }
  .awards-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .leader-photo{
    max-width:260px;
  }
}

@media (max-width: 760px){
  .awards-grid{
    grid-template-columns:1fr;
  }
}


.origin-mark.photo{
  min-height:460px;
  padding:0;
}
.origin-mark.photo img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.origin-mark.photo:before,
.origin-mark.photo:after{
  content:none;
}
.awards-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.award-card h3{
  min-height:52px;
}
@media (max-width: 1100px){
  .awards-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width: 760px){
  .awards-grid{grid-template-columns:1fr;}
}