/* Sadguru Industrial Enterprises — site styles.
   Engineering-drawing vernacular: navy base, copper for actions, kraft tint for surfaces. */

:root {
  --navy: #14283f;
  --navy-deep: #0d1b2b;
  --steel: #2b4766;
  --copper: #b5622a;
  --copper-dark: #944d1f;
  --kraft: #d9b98a;
  --kraft-pale: #f1e7d6;
  --paper: #eef1f4;
  --white: #ffffff;
  --ink: #1b2330;
  --ink-soft: #55606e;
  --rule: #c9d1da;
  --max: 1160px;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--steel); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--copper); outline-offset: 2px;
}
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; line-height: 1.05; margin: 0 0 .4em; color: var(--navy-deep); letter-spacing: .005em; }
h1 { font-size: clamp(2.4rem, 5.2vw, 3.9rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.45rem; }
h4 { font-size: 1.2rem; }
p { margin: 0 0 1em; max-width: 70ch; }
ul, ol { padding-left: 1.3em; }
li { margin-bottom: .35em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }
.soft { color: var(--ink-soft); }
.lede { font-size: 1.15rem; max-width: 62ch; }

/* ---------- Header ---------- */
.site-header { background: var(--white); border-bottom: 3px solid var(--navy); position: sticky; top: 0; z-index: 20; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--navy-deep); }
.brand-mark {
  width: 44px; height: 44px; display: grid; place-items: center;
  font-family: var(--display); font-weight: 700; font-size: 1.5rem;
  background: var(--navy); color: var(--kraft); border: 2px solid var(--navy-deep);
}
.brand-name { font-family: var(--display); font-weight: 700; font-size: 1.35rem; line-height: 1; }
.brand-name small { display: block; font-family: var(--body); font-weight: 400; font-size: .78rem; color: var(--ink-soft); margin-top: 3px; }
.nav { display: flex; gap: 26px; align-items: center; }
.nav a { text-decoration: none; font-weight: 500; color: var(--ink); padding: 4px 0; border-bottom: 2px solid transparent; }
.nav a:hover { border-bottom-color: var(--copper); }
.nav a.btn { border-bottom: 0; }
.nav-toggle { display: none; background: none; border: 2px solid var(--navy); padding: 6px 10px; font-size: 1.2rem; cursor: pointer; color: var(--navy); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 13px 24px; text-decoration: none; font-weight: 600;
  font-family: var(--body); border: 2px solid transparent; line-height: 1.2; cursor: pointer;
}
.btn-primary { background: var(--copper); color: var(--white); border-color: var(--copper); }
.btn-primary:hover { background: var(--copper-dark); border-color: var(--copper-dark); }
.btn-outline { border-color: var(--navy); color: var(--navy); background: transparent; }
.btn-outline:hover { background: var(--navy); color: var(--white); }
.btn-light { border-color: var(--kraft); color: var(--kraft); background: transparent; }
.btn-light:hover { background: var(--kraft); color: var(--navy-deep); }
.btn-wa { background: #1f9d55; color: var(--white); border-color: #1f9d55; }
.btn-wa:hover { background: #167a42; border-color: #167a42; }

/* ---------- Hero with title block ---------- */
.hero { background: var(--navy); color: var(--white); position: relative; overflow: hidden; }
.hero::before {
  /* faint drawing grid */
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .07;
  background-image: linear-gradient(var(--white) 1px, transparent 1px), linear-gradient(90deg, var(--white) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding-top: 64px; padding-bottom: 56px; }
.hero h1 { color: var(--white); max-width: 14ch; }
.hero .lede { color: #cfd9e4; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.hero-photos { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.hero-photos img { width: 100%; aspect-ratio: 1; object-fit: cover; border: 2px solid var(--kraft); }
.hero-photos img:first-child { grid-column: span 2; aspect-ratio: 2 / 1.1; }

.title-block { position: relative; border-top: 2px solid var(--kraft); background: var(--navy-deep); }
.title-block .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.title-block div { padding: 14px 18px 14px 0; border-right: 1px solid #2b4766; margin-right: 18px; }
.title-block div:last-child { border-right: 0; }
.title-block dt { font-size: .78rem; color: #93a3b5; margin-bottom: 2px; }
.title-block dd { margin: 0; font-family: var(--display); font-size: 1.25rem; color: var(--kraft); font-weight: 600; }

/* ---------- Sections ---------- */
section { padding: 64px 0; }
section.tint { background: var(--white); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
section.kraft { background: var(--kraft-pale); }
.section-head { max-width: 64ch; margin-bottom: 30px; }
.section-head h2 { margin-bottom: .25em; }

/* ---------- Product tiles ---------- */
.grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.tile { background: var(--white); border: 1px solid var(--rule); display: flex; flex-direction: column; text-decoration: none; color: inherit; }
.tile img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-bottom: 3px solid var(--kraft); }
.tile:hover img { border-bottom-color: var(--copper); }
.tile-body { padding: 18px 18px 20px; flex: 1; display: flex; flex-direction: column; }
.tile-body h3 { margin-bottom: 6px; }
.tile-body p { color: var(--ink-soft); font-size: .95rem; flex: 1; margin-bottom: 12px; }
.price { font-weight: 600; color: var(--copper-dark); font-size: .95rem; }

/* ---------- Feature rows ---------- */
.features { display: grid; gap: 28px 40px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.feature { border-top: 3px solid var(--navy); padding-top: 14px; }
.feature p { color: var(--ink-soft); font-size: .97rem; }

/* ---------- Steps (real sequence) ---------- */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 0; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 64px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--rule); margin: 0; }
.steps li::before { content: counter(step); font-family: var(--display); font-size: 2.2rem; font-weight: 700; color: var(--copper); line-height: 1; }
.steps h3 { margin-bottom: 4px; }
.steps p { margin: 0; color: var(--ink-soft); }

/* ---------- Spec tables ---------- */
.spec-table { width: 100%; border-collapse: collapse; margin: 14px 0 28px; background: var(--white); font-size: .97rem; }
.spec-table th, .spec-table td { text-align: left; padding: 11px 14px; border: 1px solid var(--rule); vertical-align: top; }
.spec-table th { width: 32%; background: var(--kraft-pale); font-weight: 600; color: var(--navy-deep); }
.spec-table thead th { width: auto; background: var(--navy); color: var(--white); }

/* ---------- Product page ---------- */
.crumbs { font-size: .9rem; color: var(--ink-soft); margin: 20px 0 10px; }
.crumbs a { color: var(--ink-soft); }
.product-top { display: grid; gap: 40px; grid-template-columns: 1fr 1fr; align-items: start; }
.product-top img { border: 1px solid var(--rule); background: var(--white); width: 100%; }
.enquiry-box { background: var(--white); border: 1px solid var(--rule); border-left: 5px solid var(--copper); padding: 22px; margin-top: 24px; }
.enquiry-box .btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.related { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.related a { display: block; background: var(--white); border: 1px solid var(--rule); padding: 14px 16px; text-decoration: none; font-weight: 600; color: var(--navy-deep); }
.related a:hover { border-color: var(--copper); }

/* ---------- FAQ ---------- */
.faq details { border-bottom: 1px solid var(--rule); padding: 4px 0; }
.faq summary { cursor: pointer; font-weight: 600; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--display); font-size: 1.5rem; color: var(--copper); line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-soft); padding-bottom: 12px; }

/* ---------- Guides / articles ---------- */
.article { max-width: 72ch; }
.article h2 { margin-top: 1.6em; font-size: 1.7rem; }
.article table { font-size: .95rem; }
.guide-list { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.guide-list a { display: block; background: var(--white); border: 1px solid var(--rule); border-top: 4px solid var(--navy); padding: 20px 22px; text-decoration: none; color: inherit; }
.guide-list a:hover { border-top-color: var(--copper); }
.guide-list h3 { color: var(--navy-deep); margin-bottom: 6px; }
.guide-list p { color: var(--ink-soft); font-size: .95rem; margin: 0; }

/* ---------- Glossary ---------- */
.glossary dt { font-weight: 600; margin-top: 14px; color: var(--navy-deep); }
.glossary dd { margin: 2px 0 0; color: var(--ink-soft); max-width: 70ch; }

/* ---------- Materials ---------- */
.material { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; padding: 32px 0; border-top: 1px solid var(--rule); }
.material:first-of-type { border-top: 0; }
.material h3 { font-size: 1.7rem; }
.material .std { background: var(--kraft-pale); padding: 12px 16px; font-size: .95rem; margin: 10px 0; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; gap: 40px; grid-template-columns: 1fr 1fr; }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { padding: 12px 0; border-bottom: 1px solid var(--rule); }
.contact-list strong { display: block; color: var(--navy-deep); }
form label { display: block; font-weight: 600; margin: 14px 0 6px; }
form input, form textarea, form select { width: 100%; padding: 11px 12px; border: 1px solid #a9b4c0; background: var(--white); font: inherit; }
form textarea { min-height: 120px; }
form button { margin-top: 18px; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--navy); color: var(--white); }
.cta-band .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding-top: 40px; padding-bottom: 40px; }
.cta-band h2 { color: var(--white); margin: 0; }
.cta-band p { color: #cfd9e4; margin: 4px 0 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-deep); color: #b8c4d1; padding: 44px 0 24px; font-size: .93rem; }
.site-footer a { color: var(--white); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-grid { display: grid; gap: 28px; grid-template-columns: 2fr 1fr 1fr 1fr; margin-bottom: 28px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer h3 { color: var(--kraft); font-size: 1.2rem; }
.copy { border-top: 1px solid #2b4766; padding-top: 16px; font-size: .85rem; }

/* ---------- Floating WhatsApp ---------- */
.wa-float { position: fixed; right: 18px; bottom: 18px; z-index: 30; background: #1f9d55; color: var(--white); text-decoration: none; font-weight: 600; padding: 12px 18px; box-shadow: 0 3px 10px rgba(0,0,0,.3); }

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .hero .wrap, .product-top, .contact-grid, .material { grid-template-columns: 1fr; }
  .title-block .wrap { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav { display: none; position: absolute; top: 75px; left: 0; right: 0; background: var(--white); flex-direction: column; gap: 0; border-bottom: 3px solid var(--navy); align-items: stretch; }
  .nav.open { display: flex; }
  .nav a { padding: 14px 22px; border-top: 1px solid var(--rule); border-bottom: 0; }
  .nav a.btn { margin: 12px 22px 16px; text-align: center; }
  .nav-toggle { display: block; }
  .hero .wrap { padding-top: 40px; padding-bottom: 36px; gap: 28px; }
  section { padding: 44px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  body { padding-bottom: 70px; }
  .steps li { grid-template-columns: 44px 1fr; }
  .steps li::before { font-size: 1.7rem; }
}

.nav .btn { padding: 9px 16px; font-size: .95rem; }