/* Tulsa Gas Technologies — redesign concept */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root{
  --ink:#0b1627;
  --navy:#0a1628;
  --navy-2:#11233d;
  --steel:#5b6b80;
  --line:#e3e8ef;
  --mist:#f4f7fb;
  --blue:#1d6cf0;
  --blue-2:#3d8bff;
  --flame:#5fb3ff;
  --white:#fff;
  --radius:14px;
  --shadow:0 10px 30px -12px rgba(10,22,40,.25);
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.15;margin:0 0 .6em;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,5vw,3.8rem);font-weight:800}
h2{font-size:clamp(1.7rem,3.2vw,2.5rem);font-weight:800}
h3{font-size:1.2rem;font-weight:700}
p{margin:0 0 1em}
.container{width:min(var(--max),92%);margin-inline:auto}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin-bottom:.9rem}
.dark .eyebrow{color:var(--flame)}
.lead{font-size:1.15rem;color:var(--steel);max-width:62ch}
.dark .lead{color:#b7c4d6}
section{padding:88px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{text-align:center;margin-inline:auto}
.section-head.center .lead{margin-inline:auto}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.9rem 1.4rem;border-radius:10px;font-weight:600;font-size:.98rem;border:2px solid transparent;transition:.2s;cursor:pointer}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#155ad0}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn svg{width:18px;height:18px}

/* Top bar + header */
.topbar{background:#050c18;color:#9fb0c6;font-size:.84rem}
.topbar .container{display:flex;justify-content:space-between;gap:1rem;padding:.5rem 0;flex-wrap:wrap}
.topbar a{color:#d7e3f3}
.topbar span{white-space:nowrap}
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,22,40,.96);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:.8rem;color:#fff}
.brand:hover{text-decoration:none}
.brand img{height:44px;width:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:1rem;font-weight:800;letter-spacing:-.01em}
.brand-text small{font-size:.7rem;color:#8fa6c4;letter-spacing:.12em;text-transform:uppercase;font-weight:600}
.menu{display:flex;align-items:center;gap:.2rem;list-style:none;margin:0;padding:0}
.menu a{color:#cfdae8;font-weight:500;font-size:.92rem;padding:.55rem .7rem;border-radius:8px;white-space:nowrap}
.menu a:hover,.menu a.active{color:#fff;background:rgba(255,255,255,.07);text-decoration:none}
.menu .btn{margin-left:.6rem;padding:.6rem 1rem;color:#fff}
.menu .btn:hover{background:#155ad0}
.nav-toggle{display:none;background:none;border:0;color:#fff;padding:.5rem;cursor:pointer}
.nav-toggle svg{width:28px;height:28px}

/* Hero */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;padding:96px 0 110px}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 500px at 85% 20%,rgba(61,139,255,.28),transparent 60%),radial-gradient(700px 400px at 0% 100%,rgba(29,108,240,.18),transparent 60%)}
.hero .container{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero h1 span{background:linear-gradient(90deg,#7cc2ff,#3d8bff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{margin-bottom:2rem}
.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap}
.hero-badges{display:flex;gap:1.6rem;margin-top:2.4rem;flex-wrap:wrap;color:#b7c4d6;font-size:.9rem}
.hero-badges div{display:flex;align-items:center;gap:.5rem}
.hero-badges svg{width:20px;height:20px;color:var(--flame)}
.hero-collage{display:grid;grid-template-columns:1.2fr 1fr;grid-template-rows:200px 200px;gap:14px}
.hero-collage img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius);box-shadow:0 20px 40px -18px rgba(0,0,0,.6)}
.hero-collage img:first-child{grid-row:span 2}

/* Page hero */
.page-hero{background:var(--navy);color:#fff;padding:80px 0 72px;position:relative;overflow:hidden}
.page-hero{background-size:cover;background-position:center}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.2rem);max-width:18ch}
.crumbs{font-size:.85rem;color:#8fa6c4;margin-bottom:1rem}
.crumbs a{color:#cfdae8}

/* Stats */
.stats{background:#fff;margin-top:-56px;position:relative;z-index:2}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-radius:18px;box-shadow:var(--shadow);border:1px solid var(--line);overflow:hidden}
.stat{padding:28px 26px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:2.1rem;font-weight:800;letter-spacing:-.03em;color:var(--navy)}
.stat span{color:var(--steel);font-size:.92rem}

/* Cards */
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#d0d9e6}
.card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.card-body p{color:var(--steel);font-size:.95rem}
.card-link svg{width:16px;height:16px}
.card-link{margin-top:auto;font-weight:600;font-size:.92rem;display:inline-flex;align-items:center;gap:.35rem}
.tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);background:#eaf2ff;border-radius:999px;padding:.25rem .65rem;margin-bottom:.8rem;align-self:flex-start}

/* Feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split.rev>:first-child{order:2}
.split-media{position:relative}
.split-media img{border-radius:18px;width:100%;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow)}
.split-media .float{position:absolute;right:-18px;bottom:-24px;background:#fff;border-radius:14px;padding:16px 20px;box-shadow:var(--shadow);border:1px solid var(--line);max-width:240px}
.split-media .float b{display:block;font-size:1.6rem;color:var(--blue);letter-spacing:-.02em}
.split-media .float span{font-size:.85rem;color:var(--steel)}
.checks{list-style:none;padding:0;margin:1.2rem 0 1.8rem;display:grid;gap:.7rem}
.checks li{position:relative;padding-left:1.9rem}
.checks li::before{content:"";position:absolute;left:0;top:.28rem;width:1.15rem;height:1.15rem;border-radius:50%;background:#eaf2ff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231d6cf0' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/62% no-repeat}
.dark .checks li::before{background-color:rgba(95,179,255,.15)}
.cols2{columns:2;column-gap:2rem}

/* Bands */
.mist{background:var(--mist)}
.dark{background:var(--navy);color:#fff}
.dark p{color:#b7c4d6}
.dark .card{background:var(--navy-2);border-color:rgba(255,255,255,.08)}
.dark .card p{color:#9fb0c6}

/* Icons tiles */
.icon-tile{padding:28px;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
.icon-tile .ic{width:48px;height:48px;border-radius:12px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;margin-bottom:1rem}
.icon-tile .ic svg{width:24px;height:24px}
.icon-tile p{color:var(--steel);font-size:.95rem;margin:0}
.dark .icon-tile{background:var(--navy-2);border-color:rgba(255,255,255,.08)}
.dark .icon-tile .ic{background:rgba(95,179,255,.12);color:var(--flame)}

/* Steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.step{position:relative;padding:26px 22px;border-radius:var(--radius);background:var(--navy-2);border:1px solid rgba(255,255,255,.08)}
.step::before{counter-increment:s;content:"0" counter(s);font-weight:800;font-size:.85rem;color:var(--flame);letter-spacing:.1em;display:block;margin-bottom:.8rem}
.steps.plain .step::before{display:none}
.step h3{font-size:1.05rem}
.step p{font-size:.9rem;margin:0}

/* Gallery */
.gallery{display:grid;grid-auto-flow:dense;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:14px}
.gallery figure{margin:0;position:relative;overflow:hidden;border-radius:12px;cursor:zoom-in;background:#dfe5ee}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.gallery figure:hover img{transform:scale(1.05)}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:28px 14px 12px;font-size:.82rem;font-weight:600;color:#fff;background:linear-gradient(transparent,rgba(5,12,24,.85))}
.gallery .wide{grid-column:span 2}
.gallery .tall{grid-row:span 2}
.filters{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:28px}
.filters button{font:inherit;font-size:.88rem;font-weight:600;padding:.5rem 1rem;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}
.filters button.on{background:var(--navy);color:#fff;border-color:var(--navy)}

/* Lightbox */
.lightbox{position:fixed;inset:0;background:rgba(5,12,24,.92);display:none;align-items:center;justify-content:center;z-index:100;padding:4vw}
.lightbox.open{display:flex}
.lightbox img{max-height:85vh;border-radius:10px}
.lightbox p{position:absolute;bottom:3vh;color:#fff;font-weight:600;text-align:center;left:0;right:0}
.lightbox button{position:absolute;top:18px;right:22px;background:none;border:0;color:#fff;font-size:2.2rem;cursor:pointer}

/* Tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--mist);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--steel)}
tr:last-child td{border-bottom:0}
td.num{white-space:nowrap;font-weight:600}

/* Tool / CTA */
.tools{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tool{display:flex;flex-direction:column;gap:.5rem;padding:24px;border-radius:var(--radius);background:linear-gradient(160deg,#12284a,#0c1b33);border:1px solid rgba(255,255,255,.08);color:#fff;transition:.2s}
.tool:hover{text-decoration:none;border-color:var(--blue-2);transform:translateY(-3px)}
.tool .ic{width:44px;height:44px;border-radius:12px;background:rgba(95,179,255,.14);display:grid;place-items:center;color:var(--flame)}
.tool .ic svg{width:22px;height:22px}
.tool strong{font-size:1.05rem}
.tool span{font-size:.9rem;color:#9fb0c6}
.cta{background:linear-gradient(120deg,#1d6cf0,#0b3d91);color:#fff;border-radius:22px;padding:56px;display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta h2{margin-bottom:.3em}
.cta p{color:#d6e5ff;margin:0;max-width:56ch}
.cta .btn-primary{background:#fff;color:var(--blue)}
.cta .btn-primary:hover{background:#eaf2ff}

/* News */
.news-item{display:grid;grid-template-columns:120px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.news-item:first-child{padding-top:0}
.news-item time{font-size:.8rem;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.08em}
.news-item h3{font-size:1.05rem;margin-bottom:.3em}
.news-item p{color:var(--steel);font-size:.94rem;margin:0}

/* FAQ */
.faq details{border:1px solid var(--line);border-radius:12px;padding:0 22px;margin-bottom:12px;background:#fff}
.faq summary{cursor:pointer;font-weight:600;padding:18px 0;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--blue);line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--steel)}

/* Contact */
.form{display:grid;gap:14px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px;box-shadow:var(--shadow)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form label{font-size:.85rem;font-weight:600;display:grid;gap:6px}
.form input,.form select,.form textarea{font:inherit;padding:.8rem .9rem;border:1px solid #d3dbe6;border-radius:10px;background:#fbfcfe}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--blue-2);border-color:transparent}
.info-list{display:grid;gap:18px}
.info{display:flex;gap:14px;align-items:flex-start}
.info .ic{flex:none;width:44px;height:44px;border-radius:12px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center}
.info .ic svg{width:22px;height:22px}
.info b{display:block}
.info span,.info a{color:var(--steel)}
.map{border-radius:18px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9}
.map iframe{width:100%;height:100%;border:0}

/* Logos strip */
.brands{display:flex;flex-wrap:wrap;gap:12px}
.brands span{padding:.55rem 1rem;border:1px solid var(--line);border-radius:999px;font-weight:600;font-size:.88rem;color:var(--steel);background:#fff}

/* Footer */
footer{background:#050c18;color:#9fb0c6;padding:72px 0 28px;font-size:.93rem}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
footer h4{color:#fff;font-size:.9rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:1rem}
footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.5rem}
footer a{color:#cfdae8}
footer .brand img{height:40px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:48px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;font-size:.85rem}

/* Reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* Responsive */
@media (max-width:1240px){.brand-text small{display:none}}
@media (max-width:1140px){
  .menu{position:fixed;inset:78px 0 auto 0;background:var(--navy);flex-direction:column;align-items:stretch;padding:12px 4% 24px;gap:2px;transform:translateY(-130%);transition:.3s;border-bottom:1px solid rgba(255,255,255,.08);max-height:calc(100vh - 78px);overflow:auto}
  .menu.open{transform:none}
  .menu a{padding:.9rem 1rem}
  .menu .btn{margin:.6rem 0 0;justify-content:center}
  .nav-toggle{display:block}
}
@media (max-width:1080px){
  .steps{grid-template-columns:repeat(2,1fr)}
  .tools{grid-template-columns:repeat(2,1fr)}
  .g4{grid-template-columns:repeat(2,1fr)}
  .foot{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  section{padding:64px 0}
  .hero{padding:64px 0 96px}
  .hero .container,.split{grid-template-columns:1fr;gap:40px}
  .split.rev>:first-child{order:0}
  .hero-collage{grid-template-rows:150px 150px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:170px}
  .split-media .float{right:12px;bottom:-20px}
  .cta{padding:40px 28px}
  .cols2{columns:1}
}
@media (max-width:560px){
  .topbar .hide-sm{display:none}
  .brand-text small{display:none}
  .brand img{height:36px}
  .g2,.g3,.g4,.tools,.steps{grid-template-columns:1fr}
  .form .row{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .news-item{grid-template-columns:1fr;gap:6px}
  .gallery .wide{grid-column:span 2}
  .stat{padding:20px 18px}
  .stat b{font-size:1.7rem}
}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}