/* OILTEC UAE — responsive corporate landing page
   Palette: deep ink + muted teal + warm sand. Text contrast follows the reference site's
   dark-on-light and white-on-dark treatment. */
:root {
  --ink: #142b31;
  --ink-deep: #0d2025;
  --teal: #247a78;
  --teal-bright: #4caaa2;
  --sand: #f1eee7;
  --paper: #fbfaf7;
  --muted: #657477;
  --line: #d9dfdb;
  --white: #fff;
  --font-head: "Manrope", sans-serif;
  --font-body: "DM Sans", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--font-body); font-size: 15px; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.topbar { background: var(--ink-deep); color: #d5e1df; font-size: 11px; letter-spacing: .04em; }
.topbar-inner, .topbar-contact { display: flex; align-items: center; justify-content: space-between; }
.topbar-inner { min-height: 37px; }
.topbar-contact { gap: 28px; }
.topbar a { color: #fff; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(251,250,247,.97); border-bottom: 1px solid rgba(20,43,49,.08); backdrop-filter: blur(12px); }
.nav-wrap { min-height: 86px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); }
.brand-mark { width: 42px; height: 42px; border: 2px solid var(--teal); color: var(--teal); display: grid; place-items: center; font: 800 27px var(--font-head); transform: skew(-7deg); }
.brand-name { display: flex; flex-wrap: wrap; align-items: baseline; font: 800 20px/.95 var(--font-head); letter-spacing: .035em; }
.brand-name > span { color: var(--teal); margin-left: 5px; }
.brand-name small { flex-basis: 100%; margin-top: 7px; font: 700 8px/1 var(--font-body); letter-spacing: .16em; color: #718084; }
.main-nav { display: flex; align-items: center; gap: 30px; font-size: 12px; font-weight: 700; color: #34484c; }
.main-nav > a:not(.nav-cta) { transition: color .2s; }
.main-nav > a:hover, .main-nav > .active { color: var(--teal); }
.nav-cta { padding: 13px 18px; background: var(--teal); color: #fff; }
.nav-cta b { margin-left: 13px; }
.nav-toggle, .menu-button { display: none; }
.hero { min-height: 650px; position: relative; display: flex; align-items: center; overflow: hidden; color: #fff; background: #152b30 url("https://images.unsplash.com/photo-1513828583688-c52646e9b5c9?auto=format&fit=crop&w=2000&q=90") center 48%/cover no-repeat; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,25,29,.91) 0%, rgba(8,25,29,.74) 48%, rgba(8,25,29,.22) 100%), linear-gradient(0deg, rgba(8,25,29,.3), transparent 55%); }
.hero-content { position: relative; z-index: 1; padding-top: 25px; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--teal); font-size: 10px; font-weight: 700; letter-spacing: .17em; }
.eyebrow > span { width: 25px; height: 2px; background: var(--teal-bright); display: inline-block; }
.eyebrow.light { color: #d3e1df; }
.hero h1 { margin: 23px 0 17px; font: 700 clamp(48px, 6.4vw, 79px)/1.08 var(--font-head); letter-spacing: -.055em; }
h1 em, h2 em { color: var(--teal-bright); font-style: normal; }
.hero-content > p { max-width: 520px; margin: 0; color: #d9e1df; font-size: 16px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }
.button { min-height: 50px; padding: 0 21px; display: inline-flex; justify-content: center; align-items: center; gap: 27px; border: 1px solid transparent; font: 700 11px var(--font-body); cursor: pointer; transition: .2s ease; }
.button span { font-size: 17px; }
.button-primary { color: #fff; background: var(--teal); }
.button-primary:hover { background: #1b6261; transform: translateY(-2px); }
.button-outline { color: #fff; border-color: rgba(255,255,255,.55); }
.button-outline:hover { background: #fff; color: var(--ink); }
.hero-note { margin-top: 76px; display: flex; align-items: center; gap: 12px; color: #c3d1ce; font-size: 9px; letter-spacing: .16em; }
.note-line { width: 42px; height: 1px; background: var(--teal-bright); }
.hero-index { position: absolute; right: max(24px, calc((100% - 1180px)/2)); bottom: 36px; color: #b7c7c3; font-size: 11px; }
.hero-index strong { color: #fff; font: 700 22px var(--font-head); }
.proof-strip { background: var(--sand); border-bottom: 1px solid #e4e2dc; }
.proof-grid { min-height: 145px; display: grid; grid-template-columns: 1.1fr 1fr 1fr 1fr; align-items: center; gap: 25px; }
.mini-label { display: block; color: var(--teal); font-size: 9px; font-weight: 700; letter-spacing: .15em; }
.proof-intro strong { display: block; margin-top: 5px; font: 700 21px/1.25 var(--font-head); letter-spacing: -.04em; }
.proof-item { display: flex; align-items: center; gap: 14px; }
.proof-icon { width: 43px; height: 43px; border: 1px solid #b9cbc5; color: var(--teal); display: grid; place-items: center; font-size: 21px; }
.proof-item strong, .proof-item small { display: block; }
.proof-item strong { font: 700 12px var(--font-head); }
.proof-item small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.section { padding: 108px 0; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 90px; }
.about-visual { position: relative; padding: 0 35px 35px 0; }
.about-visual:before { content: ""; position: absolute; right: 0; bottom: 0; width: 72%; height: 70%; background: var(--sand); z-index: -1; }
.about-visual img { width: 100%; height: 475px; object-fit: cover; }
.image-caption { position: absolute; left: 0; bottom: 35px; padding: 17px 22px; background: var(--ink); color: #fff; min-width: 245px; }
.image-caption span, .image-caption strong { display: block; }
.image-caption span { color: #80c0b7; font-size: 9px; letter-spacing: .15em; }
.image-caption strong { margin-top: 4px; font: 600 13px var(--font-head); }
.visual-stamp { position: absolute; right: 12px; top: 25px; background: var(--teal); color: #fff; width: 94px; height: 94px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; transform: rotate(9deg); }
.visual-stamp span { font: 800 16px var(--font-head); }
.visual-stamp small { font-size: 6px; letter-spacing: .1em; }
.about-copy h2, .section-heading h2, .industry-copy h2, .center-heading h2, .contact-copy h2 { margin: 18px 0; font: 700 clamp(34px, 4vw, 48px)/1.16 var(--font-head); letter-spacing: -.05em; }
.about-copy h2 em, .section-heading h2 em, .center-heading h2 em { color: var(--teal); }
.about-copy p { color: var(--muted); font-size: 13px; line-height: 1.9; }
.about-copy p.lead { color: var(--ink); font-size: 15px; font-weight: 600; }
.text-link { display: inline-flex; align-items: center; gap: 28px; margin-top: 13px; color: var(--teal); font-size: 11px; font-weight: 700; border-bottom: 1px solid #a9c7c0; padding-bottom: 8px; }
.text-link span { font-size: 16px; }
.about-stats { display: flex; gap: 55px; border-top: 1px solid var(--line); margin-top: 36px; padding-top: 24px; }
.about-stats div { display: flex; align-items: center; gap: 13px; }
.about-stats strong { font: 800 26px var(--font-head); color: var(--teal); }
.about-stats small { color: var(--muted); font-size: 9px; line-height: 1.5; }
.products-section { background: var(--sand); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 35px; margin-bottom: 40px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p { max-width: 350px; margin: 0 0 6px; color: var(--muted); font-size: 13px; }
.product-grid { display: grid; grid-template-columns: 1.12fr 1fr 1fr; grid-template-rows: 260px 260px; gap: 17px; }
.product-card { min-height: 245px; position: relative; overflow: hidden; background: var(--ink); color: #fff; }
.product-feature { grid-row: span 2; }
.product-card img { width: 100%; height: 100%; object-fit: cover; opacity: .76; transition: transform .5s; }
.product-card:hover img { transform: scale(1.05); }
.product-card:after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(8,25,29,.93), rgba(8,25,29,.02) 85%); }
.product-overlay { position: absolute; z-index: 1; inset: auto 22px 20px; }
.product-overlay > span { color: #9fd0c8; font-size: 8px; letter-spacing: .15em; font-weight: 700; }
.product-overlay h3 { margin: 8px 0 4px; font: 700 24px/1.12 var(--font-head); letter-spacing: -.04em; }
.product-overlay p { max-width: 280px; margin: 0; color: #d0d9d6; font-size: 10px; }
.product-overlay a { position: absolute; right: 0; bottom: 0; width: 37px; height: 37px; display: grid; place-items: center; background: var(--teal); color: #fff; font-size: 17px; }
.product-feature .product-overlay { inset: auto 27px 28px; }
.product-feature .product-overlay h3 { font-size: 34px; }
.products-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 26px; }
.products-foot > span { color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .13em; }
.industry-section { padding: 105px 0; background: var(--ink); color: #fff; position: relative; overflow: hidden; }
.industry-section:after { content: "O"; position: absolute; right: -30px; bottom: -250px; font: 800 600px/.8 var(--font-head); color: rgba(255,255,255,.025); }
.industry-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; position: relative; z-index: 1; }
.industry-copy h2 { margin-top: 20px; }
.industry-copy h2 em, .contact-copy h2 em { color: #68b9ae; }
.industry-copy p, .contact-copy > p { max-width: 420px; color: #c1cecb; font-size: 13px; line-height: 1.9; }
.button-light { margin-top: 17px; background: #fff; color: var(--ink); }
.button-light:hover { background: #dcebe6; }
.industry-list { align-self: center; border-top: 1px solid rgba(255,255,255,.2); }
.industry-row { min-height: 76px; border-bottom: 1px solid rgba(255,255,255,.2); display: grid; grid-template-columns: 55px 1fr 25px; align-items: center; }
.industry-row span { color: #7dbdb3; font-size: 10px; }
.industry-row strong { font: 600 19px var(--font-head); }
.industry-row b { color: #8bc9c0; font-size: 19px; font-weight: 400; }
.values-section { background: var(--paper); }
.center-heading { text-align: center; }
.center-heading .eyebrow { justify-content: center; }
.center-heading h2 { margin: 15px 0 10px; }
.center-heading > p { color: var(--muted); font-size: 13px; }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-top: 48px; }
.value-card { position: relative; min-height: 235px; padding: 25px 22px; border: 1px solid var(--line); background: #fff; transition: transform .2s, border-color .2s; }
.value-card:hover { transform: translateY(-5px); border-color: #8cbab1; }
.value-number { position: absolute; right: 20px; top: 18px; color: #a5b5b1; font-size: 10px; }
.value-symbol { width: 43px; height: 43px; display: grid; place-items: center; color: var(--teal); background: #eaf2ee; font-size: 21px; }
.value-card h3 { margin: 22px 0 7px; font: 700 17px var(--font-head); }
.value-card p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.8; }
.contact-section { padding: 100px 0; background: #163b40; color: #fff; }
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: start; }
.contact-copy h2 { margin-top: 22px; }
.contact-detail { margin-top: 28px; display: flex; flex-direction: column; gap: 4px; }
.contact-detail span { color: #86bdb4; font-size: 9px; font-weight: 700; letter-spacing: .16em; }
.contact-detail a, .contact-detail strong { color: #fff; font: 600 15px var(--font-head); }
.contact-form { padding: 35px; background: var(--paper); color: var(--ink); }
.form-heading { display: flex; justify-content: space-between; align-items: center; padding-bottom: 22px; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
.form-heading span { font: 800 13px var(--font-head); letter-spacing: .08em; }
.form-heading small, .form-note { color: var(--muted); font-size: 9px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.contact-form label { display: block; margin-bottom: 16px; color: #405458; font-size: 10px; font-weight: 700; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; margin-top: 7px; padding: 13px 12px; border: 1px solid #dce2de; border-radius: 0; outline: none; background: #fff; color: var(--ink); font: 11px var(--font-body); }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--teal); }
.contact-form textarea { resize: vertical; }
.submit-button { border: 0; }
.form-note { display: inline-block; margin: 0 0 0 12px; }
.site-footer { background: var(--ink-deep); color: #fff; }
.footer-main { padding: 65px 0 55px; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 45px; }
.brand-invert { color: #fff; }
.brand-invert .brand-name small { color: #9aaead; }
.footer-brand p { max-width: 240px; margin-top: 20px; color: #aebfbb; font-size: 11px; }
.footer-col { display: flex; flex-direction: column; align-items: flex-start; gap: 11px; }
.footer-col > strong { margin-bottom: 8px; color: #7fc1b7; font-size: 9px; letter-spacing: .16em; }
.footer-col a, .footer-col span { color: #c4d0cd; font-size: 11px; }
.footer-col a:hover, .footer-bottom a:hover { color: #83c9be; }
.footer-bottom { min-height: 60px; border-top: 1px solid rgba(255,255,255,.13); display: flex; justify-content: space-between; align-items: center; color: #8fa29e; font-size: 9px; }

@media (max-width: 900px) {
  .main-nav { gap: 16px; }
  .about-grid { gap: 45px; }
  .industry-layout { gap: 45px; }
  .contact-grid { gap: 45px; }
  .proof-grid { grid-template-columns: 1fr 1fr; padding: 25px 0; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .container { width: min(100% - 36px, 540px); }
  .topbar-inner { justify-content: center; min-height: 34px; }
  .topbar-inner > span { display: none; }
  .topbar-contact { gap: 15px; font-size: 10px; }
  .nav-wrap { min-height: 72px; }
  .menu-button { display: flex; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
  .menu-button span { width: 24px; height: 2px; background: var(--ink); }
  .main-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 18px; background: var(--paper); border-top: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 0; box-shadow: 0 15px 20px rgba(0,0,0,.08); }
  .main-nav a { padding: 12px 8px; }
  .main-nav .nav-cta { text-align: center; margin-top: 8px; }
  .nav-toggle:checked ~ .main-nav { display: flex; }
  .hero { min-height: 620px; background-position: 58% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(8,25,29,.9), rgba(8,25,29,.56)); }
  .hero h1 { font-size: clamp(44px, 12vw, 62px); }
  .hero-content > p { font-size: 14px; }
  .hero-note { margin-top: 55px; }
  .proof-grid { gap: 22px 12px; }
  .proof-intro strong { font-size: 18px; }
  .proof-item { gap: 9px; }
  .proof-icon { width: 36px; height: 36px; flex: 0 0 36px; }
  .proof-item strong { font-size: 10px; }
  .proof-item small { font-size: 9px; }
  .section { padding: 75px 0; }
  .about-grid, .industry-layout, .contact-grid { grid-template-columns: 1fr; gap: 42px; }
  .about-visual img { height: 360px; }
  .about-copy h2, .section-heading h2, .industry-copy h2, .center-heading h2, .contact-copy h2 { font-size: 37px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 20px; }
  .product-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 260px 220px 220px; gap: 10px; }
  .product-feature { grid-column: span 2; grid-row: auto; }
  .product-overlay { inset: auto 14px 14px; }
  .product-overlay h3 { font-size: 19px; }
  .product-overlay p { font-size: 9px; }
  .product-feature .product-overlay h3 { font-size: 28px; }
  .products-foot { align-items: flex-start; flex-direction: column; gap: 6px; }
  .industry-section, .contact-section { padding: 75px 0; }
  .industry-row { min-height: 66px; }
  .industry-row strong { font-size: 16px; }
  .values-grid { gap: 10px; margin-top: 32px; }
  .value-card { min-height: 220px; padding: 20px 15px; }
  .value-card h3 { font-size: 15px; }
  .value-card p { font-size: 10px; }
  .contact-form { padding: 23px 18px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-note { display: block; margin: 10px 0 0; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 35px 20px; padding: 48px 0 35px; }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { padding: 16px 0; flex-wrap: wrap; gap: 8px 15px; }
  .footer-bottom span:last-child { display: none; }
}
@media (max-width: 380px) {
  .brand-name { font-size: 17px; }
  .proof-grid { grid-template-columns: 1fr; }
  .proof-intro br { display: none; }
  .values-grid { grid-template-columns: 1fr; }
  .value-card { min-height: 185px; }
  .product-grid { grid-template-rows: 230px 210px 210px; }
}