/* Seno Engineering — WebGen Studio clone
   Palette + tokens sampled from source CSS (#0d99ce, #04497f, #262626, #ecf0f1). */

:root {
  --color-cyan: #0d99ce;
  --color-cyan-dark: #0a7ba8;
  --color-navy: #04497f;
  --color-navy-dark: #062a4a;
  --color-ink: #262626;
  --color-body: #333333;
  --color-mute: #6b7076;
  --color-line: #e6e8ea;
  --color-off-white: #ecf0f1;
  --color-bg: #ffffff;
  --color-bg-soft: #fcfcfc;
  --color-bg-alt: #edebeb;

  --font-body: 'Open Sans', 'Segoe UI', Roboto, Arial, sans-serif;
  --font-heading: 'Roboto Condensed', 'Open Sans', 'Segoe UI', Arial, sans-serif;

  --container: 1200px;
  --gutter: 24px;

  --topbar-h: 34px;
  --header-h: 120px;
  --shadow-card: 0 6px 22px rgba(0, 20, 45, 0.08);

  --z-header: 100;
  --z-drawer-backdrop: 190;
  --z-drawer: 200;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-body);
  background: var(--color-bg);
  scroll-behavior: smooth;
}
img { max-width: 100%; display: block; }
a { color: var(--color-cyan); text-decoration: none; }
a:hover, a:focus-visible { color: var(--color-cyan-dark); text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; margin: 0 0 0.5em; letter-spacing: 0.01em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; }
button { font: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-navy); color: #fff; padding: 8px 12px; z-index: 999;
}
.skip-link:focus { left: 12px; top: 12px; }

/* -------- TOPBAR (cyan) -------- */
.topbar {
  background: var(--color-cyan);
  color: #fff;
  font-size: 14px;
  min-height: var(--topbar-h);
  position: relative;
  z-index: calc(var(--z-header) + 1);
}
.topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 6px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.topbar a,
.topbar a:link,
.topbar a:visited,
.topbar a:hover,
.topbar a:focus,
.topbar a:active { color: #fff; font-weight: 600; letter-spacing: 0.02em; text-decoration: none; }
.topbar-label { color: #fff; font-weight: 400; margin-right: 4px; }
.topbar span { color: #fff; }

/* -------- HEADER (white bar + logo + nav) -------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: block; flex: 0 0 auto; }
.brand img {
  height: 88px;
  width: auto;
  max-width: 100%;
}

/* Primary nav */
.primary-nav { display: flex; }
.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-list > li > a {
  display: inline-block;
  padding: 12px 0;
  color: #2c3e50;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav-list > li > a:hover,
.nav-list > li > a:focus-visible,
.nav-list > li.is-active > a {
  color: var(--color-cyan);
  border-bottom-color: var(--color-cyan);
  text-decoration: none;
}

/* Submenu */
.has-submenu { position: relative; }
.submenu {
  position: absolute;
  top: 100%;
  left: -12px;
  min-width: 280px;
  background: var(--color-cyan);
  box-shadow: var(--shadow-card);
  list-style: none;
  padding: 0;
  display: none;
  z-index: calc(var(--z-header) + 5);
}
.has-submenu:hover > .submenu,
.has-submenu > a[aria-expanded="true"] + .submenu {
  display: block;
}
.submenu a {
  display: block;
  padding: 12px 18px;
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  border: 0;
}
.submenu a:hover, .submenu a:focus-visible {
  background: var(--color-navy);
  color: #fff;
  text-decoration: none;
}
.submenu li.is-active > a { background: var(--color-navy); color: #fff; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  z-index: calc(var(--z-drawer) + 1);
}
.nav-toggle-bar {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--color-navy);
  margin: 5px auto;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* -------- HOME HERO -------- */
.hero {
  position: relative;
  background: #0a1a2b url('../images/hero-welder.jpg') center/cover no-repeat;
  color: #fff;
  height: 600px;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-card {
  background: rgb(255 255 255 / 70%);
  color: var(--color-ink);
  padding: 24px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: 780px;
}
.hero-card-text {
  flex: 0 0 220px;
  text-align: center;
}
.hero-card-icon {
  display: block;
  margin: 0 auto 12px;
  width: 76px;
  height: auto;
}
.hero-card-text p {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.25;
  margin: 0 0 16px;
  color: var(--color-ink);
}
.hero-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
  flex: 1;
}
.hero-tile {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #04193c;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
.hero-tile img { width: 100%; height: 100%; object-fit: cover; }

/* Yellow separator strip (matches source) */
.hero-strip {
  height: 6px;
  background: linear-gradient(90deg, #f6c342 0%, #f4b224 100%);
}

/* -------- BUTTONS -------- */
.btn {
  display: inline-block;
  background: var(--color-cyan);
  color: #fff !important;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 14px;
  padding: 12px 28px;
  border: 0;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.btn:hover, .btn:focus-visible {
  background: var(--color-cyan-dark);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-block { display: block; width: 100%; text-align: center; }

/* -------- ABOUT (home block with icon) -------- */
.about-band {
  background: #fff;
  padding: 60px 0;
}
.about-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}
.about-icon img {
  width: 90px;
  height: auto;
  opacity: 0.85;
}
.about-inner p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-ink);
  margin: 0;
}

/* -------- SERVICE CARDS GRID (home) -------- */
.services-grid {
  padding: 20px 0 70px;
  background: #fff;
}
.services-row {
  max-width: var(--container);
  margin: 0 auto 30px;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.services-row:last-of-type { margin-bottom: 0; }
.services-secondary {
  position: relative;
  padding: 60px 0 70px;
  background: #fff;
  isolation: isolate;
}
.services-secondary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('../images/pattern-circuit.jpg') center/cover no-repeat;
  opacity: 0.36;
  z-index: -1;
}
.services-secondary .services-row {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.service-card {
  background: transparent;
  border: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.2s;
}
.service-card:hover { transform: translateY(-3px); }
.service-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #eef1f4;
}
.service-card-image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.3s;
}
.service-card:hover .service-card-image img { transform: scale(1.03); }
.service-card-body {
  padding: 24px 22px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  text-align: center;
}
.service-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  text-transform: none;
  margin-bottom: 12px;
  min-height: 44px;
}
.service-card p {
  font-size: 15px;
  color: var(--color-body);
  margin-bottom: 22px;
  flex: 1;
}

/* -------- PAGE BANNER (inner pages) -------- */
.page-banner {
  position: relative;
  background: var(--color-navy) center/cover no-repeat;
  color: #fff;
  height: 300px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(4, 25, 50, 0.7) 0%, rgba(4, 25, 50, 0.35) 100%);
}
.page-banner-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 30px var(--gutter);
  width: 100%;
}
.page-banner h1 {
  font-family: var(--font-heading);
  font-size: 44px;
  font-weight: 700;
  color: #fff;
  margin: 0;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

/* Per-page banner backgrounds */
.page-about  .page-banner { background-image: url('../images/banner-about.jpg'); }
.page-case-studies .page-banner { background-image: url('../images/banner-case-studies.jpg'); }
.page-clients .page-banner { background-image: url('../images/banner-case-studies.jpg'); }
.page-contact .page-banner { background-image: url('../images/banner-contact.jpg'); }
.page-services .page-banner,
.page-service .page-banner { background-image: url('../images/banner-case-studies.jpg'); }

/* -------- CONTENT SECTION (inner page copy) -------- */
.content-section {
  padding: 60px 0 80px;
  background: #fff;
}
.content-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.page-about .content-inner {
  max-width: var(--container);
}
.content-inner h2 {
  font-size: 26px;
  color: var(--color-navy);
  margin-top: 32px;
}
.content-inner h2:first-child { margin-top: 0; }
.content-inner p, .content-inner li { font-size: 17px; line-height: 1.7; color: var(--color-body); }
.content-inner ul { padding-left: 22px; margin-bottom: 20px; }
.content-inner li { margin-bottom: 8px; }

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  margin: 40px 0;
}
.two-col img { width: 100%; height: auto; border: 1px solid var(--color-line); }
.two-col.flip { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
.two-col.flip .two-col-body { order: 2; }
.two-col.flip img { order: 1; }

/* -------- CONTACT PAGE -------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 60px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px var(--gutter);
}
.contact-info h2, .contact-form h2 {
  font-size: 22px;
  color: var(--color-ink);
}
.contact-info p { font-size: 16px; margin-bottom: 12px; }
.contact-info a { color: var(--color-cyan); }
.contact-info .label { color: var(--color-mute); }

.contact-form form {
  display: grid;
  gap: 22px;
}
.form-row label {
  display: block;
  font-size: 14px;
  color: var(--color-ink);
  margin-bottom: 6px;
  font-weight: 600;
}
.form-row label .req { color: #e53935; }
.form-row input,
.form-row textarea {
  width: 100%;
  border: 1px solid #cfd4d9;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 15px;
  color: var(--color-ink);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(13, 153, 206, 0.15);
}
.form-row textarea { min-height: 150px; resize: vertical; }
.form-submit {
  background: #ececec;
  color: var(--color-ink) !important;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.1em;
  border: 0;
  padding: 14px 32px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  width: 100%;
  text-align: center;
  text-transform: uppercase;
}
.form-submit:hover { background: var(--color-cyan); color: #fff !important; }
.form-honeypot {
  position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden;
}
.form-status {
  padding: 12px 16px;
  border-radius: 2px;
  font-size: 14px;
  margin-top: 8px;
  display: none;
}
.form-status.is-visible { display: block; }
.form-status.is-error { background: #fdecea; color: #b71c1c; border: 1px solid #f5c6c1; }
.form-status.is-success { background: #e8f5e9; color: #256029; border: 1px solid #b6dcbb; }

/* -------- CLIENTS GRID -------- */
.clients-grid {
  max-width: var(--container);
  margin: 60px auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 30px;
}
.client {
  text-align: center;
}
.client-logo {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.client-logo img { max-height: 100%; width: auto; max-width: 100%; }
.client-name {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-ink);
  font-size: 15px;
  margin: 0;
}
.client-location { color: var(--color-mute); font-size: 14px; margin: 4px 0 0; }

/* -------- CASE STUDIES GRID -------- */
.case-studies-grid {
  max-width: var(--container);
  margin: 60px auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--color-line);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.case-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.case-card a { color: inherit; }
.case-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #eef1f4;
}
.case-card-image img { width: 100%; height: 100%; object-fit: cover; }
.case-card-body { padding: 20px 24px 24px; }
.case-card h3 {
  color: var(--color-ink);
  font-size: 20px;
  margin-bottom: 8px;
}
.case-card p { color: var(--color-body); font-size: 15px; margin: 0; }

/* -------- SERVICES LANDING -------- */
.services-landing { padding: 60px 0 40px; background: #fff; }
.services-landing .services-row { margin-bottom: 30px; }

/* -------- FOOTER -------- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-off-white);
  padding: 40px 0 0;
  font-size: 14px;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter) 30px;
  display: grid;
  grid-template-columns: 90px 110px minmax(140px, 1fr) minmax(200px, 1.4fr) minmax(220px, 1.2fr);
  gap: 30px;
  align-items: start;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; line-height: 1.5; }
.footer-col a { color: var(--color-off-white); }
.footer-col a:hover, .footer-col a:focus-visible { color: var(--color-cyan); }
.footer-col-primary li a { font-weight: 700; letter-spacing: 0.06em; font-size: 14px; }
.footer-col-services li a { font-size: 13.5px; }
.footer-contact p { margin: 0 0 10px; text-align: right; line-height: 1.4; }
.footer-contact a { color: var(--color-off-white); font-weight: 600; }
.footer-label { color: var(--color-off-white); margin-right: 4px; }
.footer-address { color: var(--color-off-white); font-size: 13.5px; }
.footer-copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 12px var(--gutter);
  text-align: center;
  font-size: 13px;
}
.footer-copyright p { margin: 0; color: var(--color-off-white); }

/* -------- RESPONSIVE -------- */
@media (max-width: 1024px) {
  .brand img { height: 76px; }
  .nav-list { gap: 22px; }
  .nav-list > li > a { font-size: 14px; }
  .hero { height: auto; min-height: 480px; }
  .hero-inner { padding: 40px var(--gutter); }
  .hero-card { flex-direction: column; max-width: 520px; }
  .hero-card-text { flex: 0 0 auto; width: 100%; }
  .hero-tiles { width: 100%; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px 32px; }
  .footer-contact p { text-align: left; }
}
@media (max-width: 768px) {
  .topbar-inner { justify-content: center; text-align: center; gap: 12px; font-size: 13px; }
  .topbar-inner .topbar-label { display: none; }
  .nav-toggle { display: block; }
  .primary-nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: min(84%, 340px);
    background: #fff;
    transform: translateX(100%);
    transition: transform 0.28s ease;
    padding: 90px 24px 24px;
    overflow-y: auto;
    z-index: var(--z-drawer);
    box-shadow: -12px 0 30px rgba(0, 0, 0, 0.15);
  }
  body.menu-open .primary-nav { transform: translateX(0); }
  body.menu-open::after {
    content: "";
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: var(--z-drawer-backdrop);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list > li { border-bottom: 1px solid var(--color-line); }
  .nav-list > li > a {
    display: block;
    padding: 14px 4px;
    border-bottom: none;
  }
  .nav-list > li.is-active > a { color: var(--color-cyan); }
  .submenu {
    position: static;
    display: block;
    box-shadow: none;
    border-top: none;
    padding: 0 0 8px 12px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .has-submenu:hover > .submenu { max-height: 0; }
  .has-submenu > a[aria-expanded="true"] + .submenu { max-height: 600px; }
  .submenu li a { padding: 10px 8px; font-size: 14px; text-align: left; }
  .hero { min-height: 420px; }
  .hero-card-text p { font-size: 16px; }
  .hero-tiles { gap: 6px; }
  .about-inner {
    grid-template-columns: 1fr; gap: 20px; text-align: center;
  }
  .about-icon { text-align: center; }
  .about-icon img { width: 80px; margin: 0 auto; }
  .services-row { grid-template-columns: 1fr; }
  .services-grid { padding: 20px 0 40px; }
  .content-section { padding: 40px 0 50px; }
  .two-col, .two-col.flip { grid-template-columns: 1fr; }
  .two-col.flip .two-col-body, .two-col.flip img { order: initial; }
  .clients-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
  .case-studies-grid { grid-template-columns: 1fr; }
  .page-banner h1 { font-size: 32px; }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-col-services { grid-column: span 2; }
  .footer-contact { grid-column: span 2; }
}
@media (max-width: 480px) {
  :root { --gutter: 16px; }
  .hero-card { padding: 20px 16px; }
  .hero-card p { font-size: 18px; }
  .page-banner h1 { font-size: 26px; }
  .content-inner h2 { font-size: 22px; }
  .content-inner p, .content-inner li { font-size: 16px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-col-services, .footer-contact { grid-column: span 1; }
  .footer-contact p { text-align: left; }
  .clients-grid { grid-template-columns: 1fr; }
}