:root {
  --steel-900:#0d1117; --steel-800:#161b22; --steel-700:#21262d;
  --steel-600:#30363d; --steel-400:#8b949e; --steel-200:#c9d1d9;
  --paper:#f4f5f7; --white:#ffffff;
  --accent:#e8622c; --accent-dark:#c44e1e;
  --steel-blue:#3a5a78;
  --radius:14px; --maxw:1180px;
  --shadow:0 10px 40px rgba(13,17,23,.12);
  --font:'Inter',system-ui,sans-serif;
}
html[lang="ta"] body { font-family:'Noto Sans Tamil','Inter',system-ui,sans-serif; }
* { box-sizing:border-box; margin:0; padding:0; }
body { font-family:var(--font); color:var(--steel-900); background:var(--paper); line-height:1.6; -webkit-font-smoothing:antialiased; }
.container { width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }
img { max-width:100%; display:block; }
a { color:inherit; text-decoration:none; }
h1,h2,h3 { line-height:1.15; font-weight:800; letter-spacing:-.02em; }

/* HEADER */
.site-header { position:sticky; top:0; z-index:50; background:rgba(13,17,23,.92); backdrop-filter:blur(10px); border-bottom:1px solid var(--steel-700); }
.header-inner { display:flex; align-items:center; justify-content:space-between; height:70px; }
.brand { display:flex; align-items:center; gap:10px; color:var(--white); font-weight:800; font-size:1.25rem; letter-spacing:.02em; }
.brand-mark { color:var(--accent); font-size:1.1rem; }
.brand-accent { color:var(--accent); }
.main-nav { display:flex; gap:28px; }
.main-nav a { color:var(--steel-200); font-weight:500; font-size:.95rem; transition:color .2s; }
.main-nav a:hover { color:var(--white); }
.header-actions { display:flex; align-items:center; gap:16px; }
.lang-switch { display:flex; background:var(--steel-700); border-radius:999px; padding:3px; }
.lang-btn { border:0; background:transparent; color:var(--steel-200); padding:6px 12px; border-radius:999px; cursor:pointer; font-size:.82rem; font-weight:600; font-family:inherit; transition:all .2s; }
.lang-btn.active { background:var(--accent); color:var(--white); }
.lang-btn:hover:not(.active) { color:var(--white); }
.nav-toggle { display:none; background:transparent; border:0; color:var(--white); font-size:1.5rem; cursor:pointer; }

/* HERO */
.hero { position:relative; min-height:88vh; display:flex; align-items:center; color:var(--white);
  background:linear-gradient(135deg,#0d1117 0%,#1a2735 45%,#2a3f52 100%); overflow:hidden; }
.hero-overlay { position:absolute; inset:0; background:
  radial-gradient(circle at 80% 20%,rgba(232,98,44,.25),transparent 45%),
  repeating-linear-gradient(115deg,rgba(255,255,255,.02) 0 2px,transparent 2px 22px); }
.hero-content { position:relative; padding:80px 24px; max-width:820px; }
.hero-eyebrow { text-transform:uppercase; letter-spacing:.22em; font-size:.8rem; color:var(--accent); font-weight:600; margin-bottom:18px; }
.hero h1 { font-size:clamp(2.2rem,5vw,3.8rem); margin-bottom:22px; }
.hero-sub { font-size:1.15rem; color:var(--steel-200); max-width:600px; margin-bottom:34px; }
.hero-cta { display:flex; gap:14px; flex-wrap:wrap; margin-bottom:54px; }
.btn { display:inline-block; padding:14px 28px; border-radius:999px; font-weight:600; font-size:.98rem; cursor:pointer; transition:transform .15s,box-shadow .2s,background .2s; border:2px solid transparent; }
.btn:hover { transform:translateY(-2px); }
.btn-primary { background:var(--accent); color:var(--white); box-shadow:0 8px 24px rgba(232,98,44,.35); }
.btn-primary:hover { background:var(--accent-dark); }
.btn-ghost { border-color:var(--steel-400); color:var(--white); }
.btn-ghost:hover { border-color:var(--white); background:rgba(255,255,255,.06); }
.hero-stats { display:flex; gap:44px; flex-wrap:wrap; }
.stat { display:flex; flex-direction:column; }
.stat-num { font-size:2rem; font-weight:800; color:var(--white); }
.stat-label { font-size:.85rem; color:var(--steel-400); }

/* SECTIONS */
.section { padding:88px 0; }
.section-alt { background:var(--white); }
.section-head { text-align:center; max-width:720px; margin:0 auto 54px; }
.section-eyebrow { text-transform:uppercase; letter-spacing:.2em; font-size:.78rem; font-weight:700; color:var(--accent); margin-bottom:14px; }
.section-head h2 { font-size:clamp(1.8rem,3.5vw,2.6rem); margin-bottom:16px; }
.section-lead { color:var(--steel-600); font-size:1.08rem; }

.grid { display:grid; gap:24px; }
.grid-2 { grid-template-columns:repeat(2,1fr); }
.grid-3 { grid-template-columns:repeat(3,1fr); }
.grid-4 { grid-template-columns:repeat(4,1fr); }

.card { background:var(--white); border:1px solid #e6e8ec; border-radius:var(--radius); padding:30px; transition:transform .2s,box-shadow .2s,border-color .2s; }
.section-alt .card { background:var(--paper); }
.card:hover { transform:translateY(-4px); box-shadow:var(--shadow); border-color:var(--accent); }
.card-icon { width:52px; height:52px; border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:1.5rem; background:linear-gradient(135deg,var(--accent),var(--accent-dark)); color:var(--white); margin-bottom:18px; }
.card h3 { font-size:1.2rem; margin-bottom:10px; }
.card p { color:var(--steel-600); font-size:.96rem; }
.card-tag { display:inline-block; margin-top:14px; font-size:.78rem; font-weight:600; color:var(--steel-blue); background:rgba(58,90,120,.1); padding:4px 12px; border-radius:999px; }

.cap-card { text-align:center; }
.cap-card .card-icon { margin:0 auto 16px; }

/* ABOUT */
.about-grid { display:grid; grid-template-columns:1.1fr .9fr; gap:56px; align-items:center; }
.about-text p { color:var(--steel-600); margin-bottom:16px; }
.about-text h2 { margin-bottom:20px; }
.check-list { list-style:none; margin-top:22px; display:grid; gap:12px; }
.check-list li { position:relative; padding-left:32px; font-weight:500; color:var(--steel-900); }
.check-list li::before { content:"✓"; position:absolute; left:0; top:0; width:22px; height:22px; background:var(--accent); color:var(--white); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:.75rem; font-weight:700; }
.about-media { aspect-ratio:1/1; border-radius:20px; background:linear-gradient(135deg,#1a2735,#2a3f52); position:relative; overflow:hidden; box-shadow:var(--shadow); }
.about-media::after { content:""; position:absolute; inset:0; background:repeating-linear-gradient(45deg,rgba(232,98,44,.15) 0 14px,transparent 14px 34px); }
.about-badge { position:absolute; bottom:24px; left:24px; right:24px; background:rgba(13,17,23,.85); backdrop-filter:blur(6px); border-radius:12px; padding:18px 20px; color:var(--white); display:flex; align-items:center; gap:16px; z-index:2; }
.about-badge-num { font-size:1.6rem; font-weight:800; color:var(--accent); }
.about-badge-text { font-size:.92rem; color:var(--steel-200); }

/* CONTACT */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:56px; }
.contact-list { list-style:none; margin-top:28px; display:grid; gap:18px; }
.contact-list li { display:flex; flex-direction:column; }
.contact-list strong { font-size:.78rem; text-transform:uppercase; letter-spacing:.1em; color:var(--accent); margin-bottom:4px; }
.contact-form { background:var(--white); border:1px solid #e6e8ec; border-radius:var(--radius); padding:32px; box-shadow:var(--shadow); }
.field { margin-bottom:18px; }
.field label { display:block; font-size:.88rem; font-weight:600; margin-bottom:6px; }
.field input,.field textarea { width:100%; padding:12px 14px; border:1px solid #d0d4da; border-radius:10px; font-family:inherit; font-size:.95rem; transition:border-color .2s,box-shadow .2s; }
.field input:focus,.field textarea:focus { outline:0; border-color:var(--accent); box-shadow:0 0 0 3px rgba(232,98,44,.15); }
.form-status { margin-top:14px; font-size:.9rem; font-weight:600; color:var(--accent); min-height:20px; }

/* FOOTER */
.site-footer { background:var(--steel-900); color:var(--steel-200); padding:44px 0; }
.footer-inner { display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.footer-brand .brand-name { color:var(--white); font-weight:800; font-size:1.2rem; }
.footer-brand p { color:var(--steel-400); font-size:.9rem; margin-top:6px; }
.footer-copy { color:var(--steel-400); font-size:.88rem; }

/* RESPONSIVE */
@media (max-width:900px){
  .grid-3,.grid-4 { grid-template-columns:repeat(2,1fr); }
  .about-grid,.contact-grid { grid-template-columns:1fr; }
  .about-media { max-width:420px; }
}
@media (max-width:680px){
  .main-nav { position:absolute; top:70px; left:0; right:0; background:var(--steel-800); flex-direction:column; gap:0; padding:0; max-height:0; overflow:hidden; transition:max-height .3s; border-bottom:1px solid var(--steel-700); }
  .main-nav.open { max-height:340px; }
  .main-nav a { padding:16px 24px; border-top:1px solid var(--steel-700); }
  .nav-toggle { display:block; }
  .grid-2,.grid-3,.grid-4 { grid-template-columns:1fr; }
  .hero-stats { gap:28px; }
  .lang-btn { padding:6px 9px; font-size:.78rem; }
}