/*!
 * Chennai Industrial Contractors — style.css
 * Premium industrial visual system. Red / Green / Blue accents on a navy base.
 * This is the single critical stylesheet (responsive rules included).
 */

/* ---------- Design tokens ---------- */
:root{
  --navy:#0B1526;
  --navy-2:#111F35;
  --ink:#101826;
  --muted:#5B6B7F;
  --line:#E4E9EF;
  --paper:#F5F7FA;
  --white:#FFFFFF;
  --red:#DC2626;
  --blue:#2563EB;
  --green:#16A34A;
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 20px 50px -20px rgba(11,21,38,.25);
  --shadow-sm:0 8px 24px -12px rgba(11,21,38,.18);
  --maxw:1240px;
  --font: -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
}

/* ---------- Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.08}
p{margin:0;color:var(--muted);line-height:1.7}

.container{max-width:var(--maxw);margin:0 auto;padding:0 28px}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--blue);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--red)}

/* ---------- Buttons & links ---------- */
.btnx{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 26px;border-radius:999px;
  font-weight:700;font-size:.95rem;border:2px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
}
.btnx:hover{transform:translateY(-2px)}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 12px 24px -10px rgba(220,38,38,.5)}
.btn-primary:hover{background:#c11f1f}
.btn-outline{border-color:rgba(255,255,255,.4);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.12)}
.btn-sm{padding:10px 20px;font-size:.85rem}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--navy);
  border-bottom:2px solid var(--line);padding-bottom:4px;transition:border-color .2s,color .2s,gap .2s;
}
.link-arrow:hover{border-color:var(--red);color:var(--red);gap:12px}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in-view{opacity:1;transform:none}

/* ---------- Top bar + Header ---------- */
.topline{height:4px;background:linear-gradient(90deg,var(--red) 0 33.33%,var(--green) 33.33% 66.66%,var(--blue) 66.66% 100%)}

.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-sm);border-bottom-color:var(--line)}
.navbar{display:flex;align-items:center;gap:28px;padding:16px 28px}

.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy)}
.brand-mark{
  width:34px;height:34px;border-radius:8px;flex:none;
  background:
    linear-gradient(180deg,transparent 0 30%,var(--red) 30% 46%,transparent 46% 54%,var(--blue) 54% 70%,transparent 70% 100%),
    var(--navy);
  position:relative;
}
.brand-mark::after{content:"";position:absolute;left:50%;top:22%;bottom:22%;width:22%;transform:translateX(-50%);background:var(--green)}
.brand-text{font-size:1.05rem;line-height:1.15;display:flex;flex-direction:column}
.brand-text small{font-size:.68rem;font-weight:600;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}

.nav-links{display:flex;align-items:center;gap:26px;margin-left:10px;flex:1}
.nav-link{font-weight:600;font-size:.92rem;color:var(--ink);position:relative;padding:6px 0}
.nav-link::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--red);transition:right .25s ease}
.nav-link:hover::after,.nav-link.active::after{right:0}
.nav-link.active{color:var(--red)}

.header-actions{display:flex;align-items:center;gap:18px}
.header-phone{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.9rem;color:var(--navy)}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:6px;cursor:pointer}
.nav-toggle span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:transform .25s,opacity .25s}

.mobile-menu{
  display:none;position:fixed;inset:0 0 0 auto;width:82%;max-width:340px;
  background:var(--navy);color:#fff;padding:100px 28px 40px;z-index:99;
  transform:translateX(100%);transition:transform .3s ease;
  overflow-y:auto;
}
.mobile-menu nav{display:flex;flex-direction:column;gap:6px}
.mobile-nav-link{padding:14px 4px;font-weight:700;font-size:1.05rem;border-bottom:1px solid rgba(255,255,255,.1);color:#fff}
.mobile-nav-link.active{color:var(--red)}

body.mobile-menu-open .mobile-menu{display:block;transform:translateX(0)}
body.mobile-menu-open{overflow:hidden}
body.mobile-menu-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.mobile-menu-open .nav-toggle span:nth-child(2){opacity:0}
body.mobile-menu-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero (home) ---------- */
.hero{position:relative;padding:150px 0 90px;color:#fff;background:var(--navy);overflow:hidden}
.hero-media{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,21,38,.88),rgba(11,21,38,.94)),
    url("https://images.unsplash.com/photo-1504917595217-d4dc5ebe6122?auto=format&fit=crop&w=2200&q=85") center/cover no-repeat;
}
.hero-grid{
  position:absolute;inset:0;opacity:.12;pointer-events:none;
  background-image:linear-gradient(90deg,#fff 1px,transparent 1px),linear-gradient(180deg,#fff 1px,transparent 1px);
  background-size:64px 64px;
}
.hero-content{position:relative;max-width:820px}
.hero .eyebrow{color:#AFC0D5}
.hero .eyebrow::before{background:var(--red)}
.hero h1{font-size:clamp(2.4rem,5vw,4.2rem);margin-top:16px;color:#fff}
.hero .lead{margin-top:22px;font-size:1.15rem;color:#C7D2E2;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:36px}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:56px}
.hero-meta span{
  font-size:.82rem;font-weight:700;letter-spacing:.03em;color:#AFC0D5;
  padding-left:16px;position:relative;
}
.hero-meta span::before{content:"";position:absolute;left:0;top:6px;width:6px;height:6px;border-radius:50%;background:var(--green)}

/* ---------- Capability strip ---------- */
.cap-strip{
  display:flex;flex-wrap:wrap;background:var(--navy-2);color:#fff;
}
.cap-item{
  flex:1 1 auto;display:flex;align-items:center;gap:12px;
  padding:22px 28px;font-weight:700;font-size:.95rem;
  border-right:1px solid rgba(255,255,255,.08);white-space:nowrap;
}
.cap-item:last-child{border-right:none}
.cap-item small{color:var(--red);font-weight:800;font-size:.8rem}

/* ---------- Section basics ---------- */
.section{padding:100px 0}
.section-dark{background:var(--navy);color:#fff}
.section-dark p{color:#AFC0D5}
.section-dark h2{color:#fff}
.dark-tech{position:relative}
.dark-tech::before{
  content:"";position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:linear-gradient(90deg,#fff 1px,transparent 1px),linear-gradient(180deg,#fff 1px,transparent 1px);
  background-size:56px 56px;
}
.tech-wrap{position:relative}

h2{font-size:clamp(1.7rem,3vw,2.5rem)}

/* ---------- Split (copy + image) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.copy h2{margin-top:14px}
.copy p{margin-top:16px}
.copy .link-arrow{margin-top:22px}

.image-frame{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.image-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.offset-tag{
  position:absolute;left:20px;bottom:20px;background:var(--white);
  padding:12px 18px;font-weight:800;font-size:.78rem;letter-spacing:.06em;
  border-left:4px solid var(--red);box-shadow:var(--shadow-sm);border-radius:4px;
}

/* ---------- Services intro (shared header row) ---------- */
.services-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:56px;flex-wrap:wrap}
.services-intro p{max-width:420px}

/* ---------- Service grid (home) ---------- */
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-tile{
  position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:3/4;
  display:block;box-shadow:var(--shadow-sm);
}
.service-tile img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.service-tile:hover img{transform:scale(1.08)}
.service-tile::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,21,38,0) 30%,rgba(11,21,38,.92) 100%);
}
.service-arrow{
  position:absolute;top:16px;right:16px;z-index:2;width:38px;height:38px;border-radius:50%;
  background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;color:var(--red);
}
.service-info{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:22px;color:#fff}
.service-num{font-weight:800;color:var(--green);font-size:.85rem;letter-spacing:.06em}
.service-info h3{margin-top:8px;font-size:1.1rem}
.service-info p{margin-top:6px;font-size:.85rem;color:#C7D2E2}

/* ---------- Capability grid (dark tech) ---------- */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:50px;position:relative}
.cap-card{
  padding:28px 22px;border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);
  transition:border-color .25s,background .25s;
}
.section-dark .cap-card{background:rgba(255,255,255,.03)}
.cap-card:hover{border-color:var(--red);background:rgba(220,38,38,.08)}
.cap-card span{font-weight:800;color:var(--blue);font-size:.85rem}
.cap-card h3{margin-top:14px;font-size:1.05rem}

/* ---------- Projects preview (home) ---------- */
.projects-preview{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;margin-top:20px}
.project-side{display:grid;gap:24px}
.project-large,.project-small{position:relative;border-radius:var(--radius);overflow:hidden;display:block;box-shadow:var(--shadow-sm)}
.project-large{min-height:420px}
.project-small{min-height:198px}
.project-large img,.project-small img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .5s ease}
.project-large:hover img,.project-small:hover img{transform:scale(1.06)}
.project-large::after,.project-small::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,21,38,0) 40%,rgba(11,21,38,.88) 100%)}
.project-label{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:24px;color:#fff}
.project-label small{color:var(--red);font-weight:800;letter-spacing:.06em;font-size:.78rem}
.project-label h3{margin-top:8px;font-size:1.25rem}
.project-small .project-label h3{font-size:1.05rem}

/* ---------- Process (approach steps) ---------- */
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:50px}
.process-item .num{
  width:52px;height:52px;border-radius:50%;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:18px;
}
.process-item:nth-child(2) .num{background:var(--red)}
.process-item:nth-child(3) .num{background:var(--green)}
.process-item:nth-child(4) .num{background:var(--blue)}
.process-item h3{font-size:1.1rem}
.process-item p{margin-top:8px;font-size:.92rem}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{
  padding:160px 0 76px;color:#fff;background:var(--navy);position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;opacity:.1;pointer-events:none;
  background-image:linear-gradient(90deg,#fff 1px,transparent 1px),linear-gradient(180deg,#fff 1px,transparent 1px);
  background-size:60px 60px;
}
.page-hero h1{position:relative;font-size:clamp(2.1rem,4.4vw,3.4rem);margin-top:14px;color:#fff;max-width:820px}
.page-hero p{position:relative;margin-top:18px;max-width:640px;color:#C7D2E2;font-size:1.05rem}

/* ---------- Values (about) ---------- */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:46px}
.value{background:#fff;border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow-sm);border-top:4px solid var(--red)}
.value:nth-child(2){border-top-color:var(--green)}
.value:nth-child(3){border-top-color:var(--blue)}
.value i{font-size:1.7rem;color:var(--navy)}
.value h3{margin-top:16px;font-size:1.15rem}
.value p{margin-top:10px;font-size:.94rem}

/* ---------- Service detail (services page) ---------- */
.service-detail{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:center;padding:56px 0;border-bottom:1px solid var(--line)}
.service-detail:first-of-type{padding-top:0}
.service-detail:last-of-type{border-bottom:none}
.service-detail:nth-of-type(even){direction:rtl}
.service-detail:nth-of-type(even) > *{direction:ltr}
.service-detail-media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);aspect-ratio:4/3}
.service-detail-media img{width:100%;height:100%;object-fit:cover}
.service-detail-copy .service-num{color:var(--red);font-weight:800;letter-spacing:.08em;font-size:.82rem}
.service-detail-copy h2{margin-top:12px;font-size:1.7rem}
.service-detail-copy p{margin-top:14px}
.cap-list{margin-top:20px;display:grid;gap:10px}
.cap-list li{position:relative;padding-left:26px;font-weight:600;color:var(--ink);font-size:.94rem}
.cap-list li::before{content:"\\2713";position:absolute;left:0;top:0;color:var(--green);font-weight:800}

/* ---------- Gallery (projects page) ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:20px;margin-top:10px}
.gallery-item{position:relative;border-radius:var(--radius);overflow:hidden;display:block;box-shadow:var(--shadow-sm)}
.gallery-item img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .5s ease}
.gallery-item:hover img{transform:scale(1.08)}
.gallery-item::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,21,38,0) 45%,rgba(11,21,38,.9) 100%)}
.gallery-item.tall{grid-row:span 2}
.gallery-item.wide{grid-column:span 2}
.gallery-copy{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:20px;color:#fff}
.gallery-copy small{color:var(--green);font-weight:800;font-size:.75rem;letter-spacing:.06em;text-transform:uppercase}
.gallery-copy h3{margin-top:6px;font-size:1.1rem}

/* ---------- Contact page ---------- */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.contact-panel{background:var(--navy);color:#fff;padding:56px 44px}
.contact-panel h2{margin-top:14px;font-size:1.9rem;color:#fff}
.contact-panel p{margin-top:14px;color:#AFC0D5}
.contact-line{display:flex;gap:16px;align-items:flex-start;margin-bottom:24px}
.contact-line i{width:42px;height:42px;border-radius:10px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:var(--red);flex:none}
.contact-line strong{display:block;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:#8FA2BC;margin-bottom:4px}
.contact-line a,.contact-line span{color:#fff;font-weight:600}

.form-panel{background:#fff;padding:56px 44px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-field{display:flex;flex-direction:column;gap:8px}
.form-field.full{grid-column:1 / -1}
.form-field label{font-size:.82rem;font-weight:700;color:var(--navy)}
.form-field input,.form-field textarea{
  border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:13px 15px;
  font-family:inherit;font-size:.95rem;color:var(--ink);transition:border-color .2s;
}
.form-field textarea{min-height:120px;resize:vertical}
.form-field input:focus,.form-field textarea:focus{outline:none;border-color:var(--blue)}
.form-submit{
  margin-top:26px;display:inline-flex;align-items:center;gap:10px;
  background:var(--red);color:#fff;border:none;padding:16px 30px;border-radius:999px;
  font-weight:700;cursor:pointer;transition:transform .2s,background .2s;
}
.form-submit:hover{transform:translateY(-2px);background:#c11f1f}
.form-submit:disabled{opacity:.7;cursor:default;transform:none}
.form-status{margin-top:16px;font-weight:600;font-size:.92rem;min-height:1.2em}
.form-status.success{color:var(--green)}
.form-status.error{color:var(--red)}

.map-wrap{width:100%;height:420px;background:var(--paper)}
.map-wrap iframe{width:100%;height:100%;border:0}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-2);color:#C7D2E2;padding:70px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:50px}
.footer-brand p{margin-top:16px;color:#8FA2BC;font-size:.92rem;max-width:280px}
.footer-brand .brand{color:#fff}
.footer-brand .brand-text small{color:#8FA2BC}
.footer-col h4{color:#fff;font-size:.85rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:18px}
.footer-col{display:flex;flex-direction:column;gap:12px;font-size:.92rem}
.footer-col a,.footer-col span{color:#AFC0D5;display:flex;align-items:center;gap:8px}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08)}
.footer-bottom-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:22px 28px;font-size:.82rem;color:#7C8FA8}

.mobile-contact-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:var(--red);color:#fff;text-align:center;padding:16px;
  font-weight:800;align-items:center;justify-content:center;gap:10px;
  box-shadow:0 -8px 24px rgba(0,0,0,.2);
}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .gallery-item.wide{grid-column:span 1}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:960px){
  .nav-links,.header-actions{display:none}
  .nav-toggle{display:flex}
  .mobile-menu{display:block}
  .split{grid-template-columns:1fr;gap:36px}
  .service-detail{grid-template-columns:1fr;gap:28px}
  .service-detail:nth-of-type(even){direction:ltr}
  .projects-preview{grid-template-columns:1fr}
  .project-large{min-height:320px}
  .process{grid-template-columns:repeat(2,1fr)}
  .values{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .mobile-contact-bar{display:flex}
  body{padding-bottom:64px}
}

@media (max-width:760px){
  .container{padding:0 20px}
  .hero{padding:120px 0 70px}
  .cap-strip{flex-direction:column}
  .cap-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.08)}
  .section{padding:70px 0}
  .service-grid{grid-template-columns:1fr}
  .cap-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr;grid-auto-rows:240px}
  .gallery-item.tall{grid-row:span 1}
  .process{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .contact-panel,.form-panel{padding:40px 26px}
  .footer-grid{grid-template-columns:1fr;padding-bottom:36px}
  .footer-bottom-inner{flex-direction:column;text-align:center}
  .page-hero{padding:130px 0 56px}
}