/* ==========================================================================
   Global Steel Frames — site stylesheet
   Plain CSS, no framework, mobile-first. Designed to load fast:
   one font family (2 weights), no external UI libraries, small footprint.
   ========================================================================== */

:root{
  --navy:        #10233b;   /* primary dark - steel/structural */
  --navy-2:      #17304f;
  --steel:       #4a5d73;   /* mid steel grey-blue */
  --steel-light: #eef1f4;   /* light section bg */
  --amber:       #e8871e;   /* accent - safety amber, CTAs */
  --amber-dark:  #c96f10;
  --ink:         #1b2430;   /* body text */
  --ink-soft:    #566072;
  --white:       #ffffff;
  --border:      #dde3e9;
  --radius:      10px;
  --shadow:      0 4px 18px rgba(16,35,59,.08);
  --shadow-lg:   0 12px 32px rgba(16,35,59,.16);
  --max:         1180px;
  --sp-1: .5rem; --sp-2: 1rem; --sp-3: 1.5rem; --sp-4: 2.5rem; --sp-5: 4rem;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4{
  font-family: "Oswald", "Arial Narrow", -apple-system, sans-serif;
  text-transform: uppercase;
  letter-spacing: .02em;
  line-height: 1.15;
  color: var(--navy);
  margin: 0 0 .6em;
}
h1{ font-size: clamp(2rem, 4.2vw, 3.4rem); }
h2{ font-size: clamp(1.5rem, 3vw, 2.3rem); }
h3{ font-size: 1.15rem; }
p{ margin: 0 0 1em; color: var(--ink-soft); }
a{ color: var(--amber-dark); text-decoration: none; }
a:hover{ text-decoration: underline; }
img{ max-width: 100%; display: block; height: auto; }
ul{ margin: 0 0 1em; padding-left: 1.2em; color: var(--ink-soft); }
li{ margin-bottom: .4em; }
.container{ max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
section{ padding: var(--sp-5) 0; }
.section-tight{ padding: var(--sp-4) 0; }
.bg-light{ background: var(--steel-light); }
.bg-navy{ background: var(--navy); color: var(--white); }
.bg-navy h1, .bg-navy h2, .bg-navy h3{ color: var(--white); }
.bg-navy p{ color: #c3cddc; }

.eyebrow{
  display: inline-block;
  color: var(--amber-dark);
  font-family: "Oswald", sans-serif;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 600;
  margin-bottom: .6em;
}
.bg-navy .eyebrow{ color: var(--amber); }

.lede{ font-size: 1.1rem; max-width: 62ch; }

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .85em 1.6em;
  border-radius: 999px;
  font-family: "Oswald", sans-serif;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: .92rem;
  font-weight: 500;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, color .15s ease, border-color .15s ease;
  text-decoration: none;
  white-space: nowrap;
  flex: none;
}
.btn:hover{ transform: translateY(-2px); text-decoration: none; }
.btn-primary{ background: var(--amber); color: var(--navy); }
.btn-primary:hover{ background: var(--amber-dark); color: var(--white); }
.btn-outline{ border-color: currentColor; color: inherit; background: transparent; }
.btn-outline:hover{ background: var(--white); color: var(--navy); }
.bg-navy .btn-outline{ color: var(--white); }
.btn-block{ width: 100%; justify-content: center; }

/* Header */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.site-header .container{ max-width: 1440px; padding: 0 1.5rem; }
.topbar{
  background: var(--navy);
  color: #cfd8e6;
  font-size: .82rem;
}
.topbar .container{
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem;
  justify-content: space-between; align-items: center;
  padding-top: .45rem; padding-bottom: .45rem;
}
.topbar a{ color: #cfd8e6; }
.topbar-links{ display: flex; flex-wrap: wrap; gap: .3rem 1.4rem; }
.topbar-links a, .topbar-links span{
  display: inline-flex; align-items: center; gap: .45rem;
  white-space: nowrap;
}
.topbar-links svg{ flex: none; width: 16px; height: 16px; }
.topbar-links a:hover{ color: var(--amber); }

.navwrap{
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 0;
}
.brand{ display: flex; align-items: center; gap: .6rem; font-family: "Oswald", sans-serif; flex: none; }
.brand-mark{
  width: 42px; height: 42px; border-radius: 8px;
  background: linear-gradient(135deg, var(--navy), var(--steel));
  display: flex; align-items: center; justify-content: center;
  color: var(--amber); font-weight: 700; font-size: 1.1rem; flex: none;
}
.brand-mark-img{ width: 92px; height: 92px; object-fit: contain; flex: none; }
.brand-text{ line-height: 1.1; }
.brand-text strong{ display: block; font-size: 1.05rem; color: var(--navy); text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }

.main-nav{ display: flex; align-items: center; gap: 1.2rem; }
.main-nav a{
  color: var(--ink);
  font-family: "Oswald", sans-serif;
  text-transform: uppercase;
  font-size: .8rem;
  letter-spacing: .02em;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active{ color: var(--amber-dark); text-decoration: none; }
.nav-cta{ display: flex; align-items: center; gap: 1rem; flex: none; }
.nav-actions{ display: flex; align-items: center; gap: 1.2rem; flex: none; }

.header-call{ display: flex; align-items: center; gap: .6rem; color: var(--navy); flex: none; white-space: nowrap; }
.header-call svg{ width: 28px; height: 28px; color: var(--amber-dark); flex: none; }
.header-call-copy{ display: flex; flex-direction: column; line-height: 1.05; }
.header-call-label{ font-family: "Oswald", sans-serif; font-size: .68rem; font-weight: 500; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-soft); }
.header-call-number{ font-family: "Oswald", sans-serif; font-size: 1.35rem; font-weight: 600; color: var(--navy); }
.header-call:hover{ text-decoration: none; }
.header-call:hover .header-call-number{ color: var(--amber-dark); }

.nav-toggle{
  display: none;
  position: relative;
  background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; padding: 0;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after{
  content: ""; position: absolute; left: 9px;
  width: 22px; height: 2px; background: var(--navy);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle::before{ top: 13px; }
.nav-toggle span{ top: 19px; }
.nav-toggle::after{ top: 25px; }
.nav-toggle[aria-expanded="true"]::before{ transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"]::after{ transform: translateY(-6px) rotate(-45deg); }
.nav-toggle[aria-expanded="true"] span{ opacity: 0; }

@media (max-width: 1560px){
  .nav-toggle{ display: flex; }
  .main-nav{
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--white); border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: flex-start; gap: 0;
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .main-nav.open{ max-height: 480px; overflow-y: auto; }
  .main-nav a{ padding: .9rem 1.25rem; width: 100%; border-top: 1px solid var(--border); white-space: normal; }
  .navwrap{ gap: 1.5rem; }
  .nav-actions{ flex: none; justify-content: flex-end; }
}
@media (max-width: 760px){
  .header-call{ display: none; }
}
.mobile-brand-banner{ display: none; }
@media (max-width: 460px){
  .brand-text{ display: none; }
  .navwrap{ gap: .6rem; }
  .nav-actions{ gap: .6rem; }
  .nav-cta .btn{ padding: .7em 1.1em; font-size: .8rem; }
  .mobile-brand-banner{
    display: block;
    background: var(--white);
    border-top: 1px solid var(--border);
    color: var(--navy);
    font-family: "Oswald", sans-serif;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .06em;
    font-size: 1.05rem;
    text-align: center;
    padding: .9rem 1rem;
  }
}

/* Hero */
.hero{
  position: relative;
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 55%, #223c5e 100%);
  color: var(--white);
  overflow: hidden;
}
.hero::after{
  content: "";
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(232,135,30,.08) 0 2px, transparent 2px 90px);
  pointer-events: none;
}
.hero .container{
  position: relative;
  display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: center;
  padding-top: var(--sp-5); padding-bottom: var(--sp-5);
}
.hero h1{ color: var(--white); }
.hero p{ color: #c3cddc; }
.hero-actions{ display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.6rem; }
.hero-stats{ display: flex; gap: 1.6rem; margin-top: 2.2rem; flex-wrap: wrap; }
.hero-stats div strong{ display: block; font-family: "Oswald", sans-serif; font-size: 1.5rem; color: var(--amber); }
.hero-stats div span{ font-size: .8rem; color: #a9b6c9; text-transform: uppercase; letter-spacing: .06em; }
.hero-visual{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius);
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-visual img, .hero-visual video{ width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 900px){
  .hero .container{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; aspect-ratio: 16/9; }
}

.about-collage{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .6rem;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.about-collage img{ width: 100%; height: 100%; object-fit: cover; display: block; }
.collage-top{ grid-column: 1 / -1; aspect-ratio: 16/10; overflow: hidden; }
.collage-logo{
  aspect-ratio: 1/1; overflow: hidden;
  background: var(--steel-light);
  display: flex; align-items: center; justify-content: center;
  padding: 1.4rem;
}
.collage-logo img{ width: 100%; height: 100%; object-fit: contain; }
.collage-side{ aspect-ratio: 1/1; overflow: hidden; }

/* Breadcrumb / page header (inner pages) */
.page-hero{
  background: linear-gradient(120deg, var(--navy), var(--navy-2));
  color: var(--white);
  padding: var(--sp-4) 0;
}
.page-hero h1{ color: var(--white); margin-bottom: .3em; }
.breadcrumb{ font-size: .82rem; color: #a9b6c9; }
.breadcrumb a{ color: #a9b6c9; }
.breadcrumb a:hover{ color: var(--amber); }

/* Grids / cards */
.grid{ display: grid; gap: 1.6rem; }
.grid-2{ grid-template-columns: repeat(2, 1fr); }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
@media (max-width: 880px){
  .grid-3, .grid-4{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px){
  .grid-2, .grid-3, .grid-4{ grid-template-columns: 1fr; }
}

.card{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem;
  transition: box-shadow .2s ease, transform .2s ease;
}
.card:hover{ box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.card .icon{
  width: 48px; height: 48px; border-radius: 10px;
  background: var(--steel-light); color: var(--amber-dark);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem; font-size: 1.4rem;
}
.card h3{ margin-bottom: .4em; }
.card p:last-child{ margin-bottom: 0; }
.card-link{ font-family: "Oswald", sans-serif; text-transform: uppercase; font-size: .82rem; letter-spacing: .04em; }

.service-card{ display: flex; flex-direction: column; height: 100%; }
.service-card .thumb{
  border-radius: calc(var(--radius) - 2px);
  aspect-ratio: 16/10;
  background: var(--steel-light);
  margin: -1.7rem -1.7rem 1.2rem;
  overflow: hidden;
}
.service-card .thumb img{ width: 100%; height: 100%; object-fit: cover; }

/* Section headers */
.section-head{ max-width: 720px; margin: 0 auto var(--sp-4); text-align: center; }
.section-head.left{ margin-left: 0; text-align: left; }

/* Benefit list w/ numbers (why choose us) */
.benefit-list{ display: grid; gap: 1.1rem; }
.benefit{
  display: grid; grid-template-columns: auto 1fr; gap: 1.1rem;
  padding: 1.3rem; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--white);
}
.benefit .num{
  font-family: "Oswald", sans-serif; font-size: 1.6rem; color: var(--amber);
  min-width: 2.2ch;
}
.benefit h3{ margin-bottom: .25em; font-size: 1.05rem; }
.benefit p{ margin: 0; }

/* Two column feature */
.split{ display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
@media (max-width: 880px){ .split{ grid-template-columns: 1fr; gap: 2rem; } }
.split img, .split .ph{ border-radius: var(--radius); box-shadow: var(--shadow); }
.ph{
  aspect-ratio: 4/3; background: linear-gradient(135deg, var(--steel-light), #dfe6ec);
  display: flex; align-items: center; justify-content: center; color: var(--ink-soft);
  font-family: "Oswald", sans-serif; text-transform: uppercase; letter-spacing: .05em; font-size: .85rem;
  text-align: center; padding: 1rem;
}

/* Checklist */
.check-list{ list-style: none; padding: 0; margin: 0; display: grid; gap: .7rem; }
.check-list li{ display: flex; gap: .7rem; align-items: flex-start; color: var(--ink); margin: 0; }
.check-list li::before{
  content: "✓"; flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--amber); color: var(--navy); font-size: .8rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center; margin-top: .1em;
}

/* Steps (installation process) */
.steps{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem; counter-reset: step; }
@media (max-width: 880px){ .steps{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px){ .steps{ grid-template-columns: 1fr; } }
.step{ position: relative; padding: 1.6rem 1.4rem 1.4rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--white); }
.step::before{
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: "Oswald", sans-serif; color: var(--amber); font-size: 1.6rem; display: block; margin-bottom: .5rem;
}

/* Stats bar */
.stats-bar{ display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; text-align: center; }
@media (max-width: 700px){ .stats-bar{ grid-template-columns: repeat(2,1fr); } }
.stats-bar strong{ display: block; font-family: "Oswald", sans-serif; font-size: 2rem; color: var(--amber); }
.stats-bar span{ font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: #a9b6c9; }

/* CTA banner */
.cta-banner{
  background: linear-gradient(120deg, var(--amber) 0%, var(--amber-dark) 100%);
  color: var(--navy);
  border-radius: var(--radius);
  padding: 2.6rem;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.cta-banner h2, .cta-banner p{ color: var(--navy); margin: 0; }
.cta-banner .btn-primary{ background: var(--navy); color: var(--white); }
.cta-banner .btn-primary:hover{ background: #0b1a2c; }

/* FAQ */
details.faq{ border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.3rem; margin-bottom: .8rem; background: var(--white); }
details.faq summary{ cursor: pointer; font-family: "Oswald", sans-serif; text-transform: uppercase; font-size: .95rem; letter-spacing: .02em; color: var(--navy); }
details.faq p{ margin: .8rem 0 0; }

/* Blog */
.post-card{ display: flex; flex-direction: column; }
.post-card .thumb{ aspect-ratio: 16/10; background: var(--steel-light); border-radius: var(--radius); margin-bottom: 1rem; overflow: hidden; }
.post-card .thumb img{ width: 100%; height: 100%; object-fit: cover; }
.post-card .cat{ font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--amber-dark); font-weight: 600; }
article.post{ max-width: 760px; margin: 0 auto; }
article.post h2{ margin-top: 1.4em; font-size: 1.35rem; }
article.post p{ color: var(--ink); }

/* Contact */
.contact-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
@media (max-width: 880px){ .contact-grid{ grid-template-columns: 1fr; } }
.info-row{ display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1.3rem; }
.info-row .icon{ width: 42px; height: 42px; border-radius: 8px; background: var(--steel-light); color: var(--amber-dark); display: flex; align-items: center; justify-content: center; flex: none; }
.info-row strong{ display: block; color: var(--navy); font-family: "Oswald", sans-serif; text-transform: uppercase; font-size: .82rem; letter-spacing: .04em; margin-bottom: .2em; }
.map-embed{ border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); margin-top: 1.5rem; }
.map-embed iframe{ width: 100%; height: 260px; border: 0; display: block; }

form.contact-form{ display: grid; gap: 1rem; }
.form-row-2{ display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px){ .form-row-2{ grid-template-columns: 1fr; } }
label{ font-size: .82rem; font-weight: 600; color: var(--navy); display: block; margin-bottom: .35em; text-transform: uppercase; letter-spacing: .03em; }
input, select, textarea{
  width: 100%; padding: .75em .9em; border: 1px solid var(--border); border-radius: 8px;
  font-family: inherit; font-size: .95rem; color: var(--ink); background: var(--white);
}
input:focus, select:focus, textarea:focus{ outline: 2px solid var(--amber); outline-offset: 1px; border-color: var(--amber); }
.form-note{ font-size: .82rem; color: var(--ink-soft); }

/* Footer */
.site-footer{ background: var(--navy); color: #b8c3d4; padding-top: var(--sp-5); }
.footer-grid{ display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.5rem; padding-bottom: var(--sp-4); }
@media (max-width: 880px){ .footer-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .footer-grid{ grid-template-columns: 1fr; } }
.site-footer h4{ color: var(--white); font-size: .85rem; letter-spacing: .06em; margin-bottom: 1rem; }
.site-footer a{ color: #b8c3d4; }
.site-footer a:hover{ color: var(--amber); }
.footer-links{ list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; }
.footer-links li{ margin: 0; }
.footer-brand p{ color: #a9b6c9; max-width: 30ch; }
.socials{ display: flex; gap: .7rem; margin-top: 1rem; }
.socials a{
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(255,255,255,.25);
  display: flex; align-items: center; justify-content: center; font-size: .85rem;
}
.socials a:hover{ background: var(--amber); border-color: var(--amber); color: var(--navy); text-decoration: none; }
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 1.2rem 0; font-size: .82rem;
  display: flex; flex-wrap: wrap; gap: .8rem; justify-content: space-between;
}
.footer-bottom a{ color: #b8c3d4; }

.sr-only{ position:absolute; width:1px;height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.skip-link{
  position: absolute; left: -999px; top: 0; background: var(--amber); color: var(--navy);
  padding: .6em 1em; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus{ left: 0; }