/* ============================================================
   SR MATRIX ENGINEERING — shared stylesheet
   Palette:  --ink (near-black), --accent (SR orange), --paper (warm white),
             --steel (secondary text/lines), --chrome (silver rod accent)
   Type:     Oswald (display/condensed industrial), Inter (body),
             Roboto Mono (spec numbers / data)
   Signature: the "gauge strip" — a ruler-tick divider that stands in for the
             force-range scale printed on every gas-spring spec sheet, plus a
             diagonal cut-corner echoing the angled R in the logo.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=Roboto+Mono:wght@500;700&display=swap');

:root{
  --ink:      #212226;   /* exact logo black */
  --ink-soft: #3a3c41;
  --accent:   #DE6216;   /* exact logo orange */
  --accent-2: #B04B10;
  --paper:    #F7F5F1;
  --panel:    #EFEAE1;
  --steel:    #5B5E64;
  --line:     #DEDAD1;
  --chrome:   #C9CDD1;
  --white:    #FFFFFF;

  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Roboto Mono', monospace;

  --container: 1180px;
}

/* ---------- logo-derived background system ---------- */
body{
  background-color: var(--paper);
  background-image:
    linear-gradient(180deg, rgba(33,34,38,.02), rgba(33,34,38,0) 220px),
    repeating-linear-gradient(135deg, rgba(33,34,38,.025) 0 2px, transparent 2px 64px);
}
.brand-mark{
  position:absolute;
  pointer-events:none;
  user-select:none;
  z-index:0;
}
.section-alt, .page-hero, .hero, .cta-band{ position:relative; overflow:hidden; }
.section-alt .brand-mark{
  right:-6%; bottom:-14%;
  width: 34%; max-width: 460px;
  opacity:.05;
}
.hero .brand-mark{
  right:-6%; bottom:-16%;
  width: 42%; max-width: 620px;
  opacity:.16;
  z-index:1;
}
.page-hero .brand-mark{
  right:-4%; top:-18%;
  width: 30%; max-width: 380px;
  opacity:.14;
}
.cta-band .brand-mark{
  left:-6%; top:-30%;
  width: 30%; max-width: 380px;
  opacity:.06;
}
.section-alt > .container,
.page-hero > .container,
.cta-band > .container{
  position:relative;
  z-index:2;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 .5em;
  color: var(--ink);
  font-weight: 600;
}
p{ margin: 0 0 1em; color: var(--ink-soft); }
.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
:focus-visible{
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- eyebrow / kicker ---------- */
.eyebrow{
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent-2);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom: 14px;
}
.eyebrow::before{
  content:"";
  width: 26px; height: 2px;
  background: var(--accent);
  display:inline-block;
}

/* ---------- gauge strip (signature divider) ---------- */
.gauge{
  --n: 24;
  height: 26px;
  width: 100%;
  background-image: repeating-linear-gradient(
    90deg,
    var(--steel) 0 2px,
    transparent 2px calc(100% / var(--n))
  );
  background-size: calc(100% / var(--n) * 4) 100%;
  opacity: .35;
  position: relative;
}
.gauge-labeled{
  display:flex;
  align-items:center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--steel);
  padding: 10px 0;
}
.gauge-labeled span{ white-space:nowrap; }
.gauge-labeled .track{
  flex:1;
  height: 10px;
  margin: 0 16px;
  background: repeating-linear-gradient(
    90deg, var(--chrome) 0 1.5px, transparent 1.5px 14px
  );
  position: relative;
}
.gauge-labeled .track::after{
  content:"";
  position:absolute; left:0; top:0; bottom:0;
  width: 62%;
  background: var(--accent);
  opacity:.85;
}

/* ---------- header / nav ---------- */
.site-header{
  position: sticky; top:0; z-index: 100;
  background: rgba(247,245,241,.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 12px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand img{ height: 46px; width:auto; }
.brand-text{
  font-family: var(--font-display);
  line-height: 1.05;
}
.brand-text b{
  display:block;
  font-size: 1.05rem;
  letter-spacing: .03em;
}
.brand-text small{
  display:block;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .18em;
  color: var(--accent-2);
  text-transform: uppercase;
}
.nav-links{
  display:flex;
  gap: 30px;
  font-family: var(--font-display);
  font-size: .92rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.nav-links a{
  position:relative;
  padding: 6px 2px;
  color: var(--ink-soft);
}
.nav-links a::after{
  content:"";
  position:absolute; left:0; right:100%; bottom:0;
  height:2px; background: var(--accent);
  transition: right .25s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after{ right:0; }
.nav-links a.active{ color: var(--ink); }

.nav-toggle{
  display:none;
  background:none; border:none; cursor:pointer;
  width: 40px; height: 40px;
  flex-direction:column; justify-content:center; align-items:center; gap:5px;
}
.nav-toggle span{
  width: 24px; height: 2px; background: var(--ink); display:block;
}

.nav-cta{
  font-family: var(--font-display);
  font-size: .82rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--white) !important;
  padding: 10px 20px;
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%);
}
.nav-cta:hover{ background: var(--accent); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: .92rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 1px solid var(--ink);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}
.btn-solid{
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}
.btn-solid:hover{ background: var(--accent-2); border-color: var(--accent-2); }
.btn-outline{ background: transparent; color: var(--ink); }
.btn-outline:hover{ background: var(--ink); color: var(--white); }
.btn-light{ border-color: rgba(255,255,255,.6); color:var(--white); }
.btn-light:hover{ background: var(--white); color: var(--ink); }

/* ---------- hero / slider ---------- */
.hero{
  position:relative;
  overflow:hidden;
  min-height: 620px;
  display:flex;
  align-items:center;
  background: var(--ink);
}
.slider{
  position:absolute; inset:0;
}
.slide{
  position:absolute; inset:0;
  opacity:0;
  transition: opacity 1.1s ease;
}
.slide.active{ opacity:1; }
.slide img{
  width:100%; height:100%; object-fit: cover;
  filter: saturate(1.02) contrast(1.03);
}
.slide::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(100deg, rgba(15,16,18,.88) 0%, rgba(15,16,18,.62) 42%, rgba(15,16,18,.28) 100%);
}
.hero-content{
  position:relative; z-index:2;
  color: var(--white);
  max-width: 660px;
  padding: 90px 0;
}
.hero-content .eyebrow{ color: var(--accent); }
.hero-content h1{
  color: var(--white);
  font-size: clamp(2.3rem, 5vw, 3.6rem);
  line-height: 1.05;
  margin-bottom: 20px;
}
.hero-content h1 em{
  font-style: normal;
  color: var(--accent);
}
.hero-content p{
  color: #D8D8D8;
  font-size: 1.08rem;
  max-width: 520px;
}
.hero-cta{
  display:flex; gap:16px; margin-top: 30px; flex-wrap: wrap;
}
.slider-dots{
  position:absolute; z-index:3; right: 24px; bottom: 24px;
  display:flex; gap:10px;
}
.slider-dots button{
  width:34px; height:4px; background: rgba(255,255,255,.35);
  border:none; cursor:pointer; padding:0;
}
.slider-dots button.active{ background: var(--accent); }

/* ---------- sections ---------- */
section{ padding: 90px 0; }
.section-alt{ background: var(--panel); }
.section-head{
  max-width: 640px;
  margin-bottom: 50px;
}
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }

/* ---------- stat / trust strip ---------- */
.stat-strip{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat-strip .stat{
  padding: 30px 24px;
  text-align:center;
  border-left: 1px solid var(--line);
}
.stat-strip .stat:first-child{ border-left:none; }
.stat-num{
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--accent-2);
}
.stat-label{
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------- feature grid ---------- */
.grid{
  display:grid;
  gap: 28px;
}
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }

.card{
  background: var(--white);
  border: 1px solid var(--line);
  padding: 32px 28px;
  position:relative;
}
.card::before{
  content:"";
  position:absolute; top:0; right:0;
  width:0; height:0;
  border-style:solid;
  border-width: 0 22px 22px 0;
  border-color: transparent var(--accent) transparent transparent;
}
.card .num{
  font-family: var(--font-mono);
  color: var(--chrome);
  font-size: .8rem;
  letter-spacing: .1em;
}
.card h3{ font-size: 1.15rem; margin-top:6px; }
.card p{ margin-bottom:0; font-size: .95rem; }

/* ---------- product category card (image + copy) ---------- */
.product-block{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items:center;
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.product-block:last-of-type{ border-bottom:none; }
.product-block:nth-of-type(even) .product-media{ order:2; }
.product-media{ position:relative; }
.product-media img{
  width:100%; aspect-ratio: 4/3.1; object-fit: cover;
  border: 1px solid var(--line);
}
.product-tag{
  position:absolute; top:-14px; left:-14px;
  background: var(--ink); color: var(--white);
  font-family: var(--font-mono);
  font-size:.68rem; letter-spacing:.1em; text-transform:uppercase;
  padding: 8px 14px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 10px 100%, 0 60%);
}
.product-copy h3{ font-size: 1.6rem; }
.force-badge{
  display:inline-flex; align-items:center; gap:8px;
  font-family: var(--font-mono);
  font-size: .78rem; letter-spacing:.06em;
  color: var(--accent-2);
  border: 1px solid var(--accent-2);
  padding: 5px 12px;
  margin-bottom: 16px;
}

.spec-table{
  width:100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: .92rem;
}
.spec-table th, .spec-table td{
  text-align:left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}
.spec-table th{
  width: 42%;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--steel);
  font-weight: 500;
}
.spec-table td{ color: var(--ink-soft); }

.tick-list li{
  position:relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: .95rem;
  color: var(--ink-soft);
}
.tick-list li::before{
  content:"";
  position:absolute; left:0; top: 8px;
  width: 10px; height:10px;
  background: var(--accent);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 30% 100%, 0 60%);
}
.tag-row{ display:flex; flex-wrap:wrap; gap:10px; margin-top: 18px; }
.tag-row span{
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--steel);
  border: 1px solid var(--line);
  padding: 6px 12px;
  background: var(--panel);
}

/* ---------- infographic strip ---------- */
.info-strip img{ border: 1px solid var(--line); }

/* ---------- CTA band ---------- */
.cta-band{
  background: var(--ink);
  color: var(--white);
  padding: 70px 0;
  text-align:center;
}
.cta-band h2{ color: var(--white); }
.cta-band p{ color: #C7C7C7; max-width: 560px; margin:0 auto 28px; }
.cta-band .hero-cta{ justify-content:center; }

/* ---------- footer ---------- */
.site-footer{
  background: var(--ink);
  color: #C9C9C9;
  padding: 60px 0 24px;
  font-size: .92rem;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-grid h4{ color: var(--white); font-size: .95rem; margin-bottom: 16px; }
.footer-grid .brand{ margin-bottom: 14px; }
.footer-grid .brand-text b{ color: var(--white); }
.footer-grid li{ margin-bottom: 10px; }
.footer-grid a:hover{ color: var(--accent); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: #8b8b8b;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- page hero (inner pages) ---------- */
.page-hero{
  background: var(--ink);
  color: var(--white);
  padding: 130px 0 60px;
  position:relative;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute; right:-6%; top:-20%;
  width: 420px; height: 420px;
  background: var(--accent);
  opacity:.12;
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 70%);
}
.page-hero h1{ color: var(--white); font-size: clamp(2rem, 4.4vw, 3.1rem); margin-bottom: 14px; }
.page-hero p{ color:#C7C7C7; max-width: 560px; }
.breadcrumb{
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--chrome);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.breadcrumb .accent{ color: var(--accent); }

/* ---------- about page bits ---------- */
.value-grid{ grid-template-columns: repeat(3, 1fr); }
.timeline{ border-left: 2px solid var(--line); padding-left: 30px; }
.timeline .t-item{ position:relative; margin-bottom: 34px; }
.timeline .t-item::before{
  content:"";
  position:absolute; left:-36px; top:4px;
  width: 12px; height:12px;
  background: var(--accent);
  border-radius: 50%;
}
.timeline .t-item .t-label{
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--accent-2);
  text-transform: uppercase;
  display:block;
  margin-bottom: 6px;
}

/* ---------- contact page ---------- */
.contact-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items:start;
}
.contact-detail{
  display:flex; gap:16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.contact-detail:first-child{ padding-top:0; }
.contact-icon{
  width: 44px; height:44px;
  background: var(--ink);
  color: var(--accent);
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0;
  font-family: var(--font-mono);
  font-weight:700;
}
.contact-detail h4{ margin-bottom:4px; font-size: 1rem; }
.contact-detail p{ margin-bottom:0; font-size: .94rem; }

.map-frame{
  border: 1px solid var(--line);
  overflow:hidden;
  height: 100%;
  min-height: 340px;
}
.map-frame iframe{ width:100%; height:100%; min-height:340px; border:0; display:block; }

.form-field{ margin-bottom: 18px; }
.form-field label{
  display:block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 8px;
}
.form-field input,
.form-field select,
.form-field textarea{
  width:100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--ink);
}
.form-field textarea{ resize: vertical; min-height: 120px; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus{
  outline: 2px solid var(--accent);
  border-color: var(--accent);
}
.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---------- responsive ---------- */
@media (max-width: 900px){
  .stat-strip{ grid-template-columns: repeat(2, 1fr); }
  .stat-strip .stat:nth-child(3){ border-left:none; }
  .grid-3, .value-grid{ grid-template-columns: repeat(2, 1fr); }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .product-block{ grid-template-columns: 1fr; }
  .product-block:nth-of-type(even) .product-media{ order:0; }
  .contact-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .nav-links{
    position:fixed; top:74px; left:0; right:0;
    background: var(--paper);
    flex-direction:column;
    gap:0;
    padding: 10px 24px 20px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-140%);
    transition: transform .3s ease;
  }
  .nav-links.open{ transform: translateY(0); }
  .nav-links a{ padding: 14px 0; border-bottom: 1px solid var(--line); width:100%; }
  .nav-toggle{ display:flex; }
  .nav-cta{ display:none; }
  .grid-3, .value-grid, .grid-2{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .hero{ min-height: 560px; }
  .form-row{ grid-template-columns: 1fr; }
}

@media (max-width: 480px){
  .footer-grid{ grid-template-columns: 1fr; }
  section{ padding: 60px 0; }
}