/* ============================================================
   GLD Concrete — gld-concrete.com
   Palette (from logo):
   --blue     #2E6FD8   primary brand blue
   --blue-2   #1F4FA6   hover / deep blue
   --ink      #16181D   text / footer
   --gray     #5A6472   secondary text
   --soft     #EEF3FB   light section background
   Type: Montserrat (display) / Inter (body)
   ============================================================ */

:root {
  --blue: #2E6FD8;
  --blue-2: #1F4FA6;
  --ink: #16181D;
  --gray: #5A6472;
  --soft: #EEF3FB;
  --line: #DCE4F2;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(22, 24, 29, .08);
  --maxw: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4 {
  font-family: 'Montserrat', 'Inter', sans-serif;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(1.9rem, 4.5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }

p { color: var(--gray); }
p.lead { font-size: 1.1rem; }

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-2); }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 3px; }

/* ---------- eyebrow / labels ---------- */
.eyebrow {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: .6rem;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: .95rem;
  padding: .8rem 1.6rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .18s, color .18s, border-color .18s;
}
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-2); color: var(--white); }
.btn-outline { border-color: var(--blue); color: var(--blue); background: transparent; }
.btn-outline:hover { background: var(--blue); color: var(--white); }
.btn-light { background: var(--white); color: var(--blue-2); }
.btn-light:hover { background: var(--soft); color: var(--blue-2); }

/* ---------- top bar ---------- */
.topbar {
  background: var(--ink);
  color: #C9D3E4;
  font-size: .82rem;
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 38px;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 4px;
  padding-bottom: 4px;
}
.topbar a { color: #E8EEF9; font-weight: 500; }
.topbar a:hover { color: var(--white); }
.topbar .contact-mini { display: flex; gap: 18px; flex-wrap: wrap; }
.lang-switch { display: flex; gap: 2px; }
.lang-switch a {
  padding: 2px 9px;
  border-radius: 6px;
  font-weight: 700;
  letter-spacing: .05em;
}
.lang-switch a.active { background: var(--blue); color: var(--white); }
.lang-switch a:not(.active) { color: #93A1B8; }
.lang-switch a:not(.active):hover { color: var(--white); }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--white);
  border-bottom: 3px solid var(--blue);
  box-shadow: 0 2px 12px rgba(22,24,29,.06);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 16px;
}
.brand img { height: 46px; width: auto; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: .9rem;
  color: var(--ink);
  padding: .5rem .7rem;
  border-radius: 8px;
}
.nav a:hover { color: var(--blue); background: var(--soft); }
.nav a.active { color: var(--blue); }
.nav .btn { margin-left: 8px; }

.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--ink);
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(150deg, var(--ink) 0%, #1D2E52 55%, var(--blue-2) 100%);
  color: var(--white);
  overflow: hidden;
}
.hero .wrap {
  position: relative;
  padding-top: clamp(3.5rem, 9vw, 6.5rem);
  padding-bottom: clamp(4.5rem, 11vw, 8rem);
  max-width: 820px;
  text-align: left;
}
.hero h1 { color: var(--white); }
.hero h1 em { font-style: italic; color: #7FA8EF; }
.hero p { color: #C9D6EE; font-size: 1.12rem; max-width: 560px; margin: 1.2rem 0 2rem; }
.hero .btn-row { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .swoosh-bg {
  position: absolute;
  right: -140px;
  top: -60px;
  width: 620px;
  opacity: .16;
  pointer-events: none;
}

/* swoosh divider (logo arc echoed at the base of dark sections) */
.swoosh-divider { display: block; width: 100%; height: 56px; margin-top: -1px; }

/* page hero (subpages) */
.page-hero {
  background: linear-gradient(140deg, var(--ink) 0%, #1D2E52 60%, var(--blue-2) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.page-hero .wrap { padding-top: 3.2rem; padding-bottom: 3.6rem; position: relative; }
.page-hero h1 { color: var(--white); }
.page-hero p { color: #C9D6EE; max-width: 640px; margin-top: .8rem; }
.page-hero .swoosh-bg {
  position: absolute; right: -160px; top: -80px; width: 520px; opacity: .14; pointer-events: none;
}

/* ---------- sections ---------- */
.section { padding: clamp(3rem, 7vw, 5rem) 0; }
.section.soft { background: var(--soft); }
.section-head { max-width: 640px; margin-bottom: 2.2rem; }

.grid { display: grid; gap: 22px; }
.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);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: .5rem; }
.card .tag {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: .75rem;
  color: var(--blue-2);
  background: var(--soft);
  border-radius: 6px;
  padding: 3px 10px;
  margin-bottom: .8rem;
  letter-spacing: .06em;
}
.card ul { list-style: none; margin-top: .6rem; }
.card ul li {
  color: var(--gray);
  padding-left: 1.3rem;
  position: relative;
  margin-bottom: .35rem;
  font-size: .95rem;
}
.card ul li::before {
  content: "";
  position: absolute; left: 0; top: .52em;
  width: 9px; height: 9px;
  border-radius: 2px;
  background: var(--blue);
}

/* strength class marker */
.cclass {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--blue);
  letter-spacing: -.02em;
}

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; background: var(--white); font-size: .95rem; }
th {
  font-family: 'Montserrat', sans-serif;
  font-size: .8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-align: left;
  background: var(--ink);
  color: var(--white);
  padding: 12px 16px;
  white-space: nowrap;
}
td { padding: 12px 16px; border-top: 1px solid var(--line); color: var(--gray); vertical-align: top; }
td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--blue); color: var(--white); }
.cta-band .wrap {
  padding: 3rem 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.cta-band h2 { color: var(--white); }
.cta-band p { color: #DCE7FA; margin-top: .4rem; }

/* ---------- forms ---------- */
.form-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  max-width: 760px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
label {
  display: block;
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: .85rem;
  margin-bottom: 6px;
}
label .req { color: var(--blue); }
input, select, textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  padding: .7rem .85rem;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  transition: border-color .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--blue); outline: none; }
textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: .85rem; color: var(--gray); margin-top: 1rem; }

/* ---------- contact blocks ---------- */
.contact-tile {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem;
  box-shadow: var(--shadow);
}
.contact-tile .ico {
  flex: 0 0 auto;
  width: 42px; height: 42px;
  border-radius: 10px;
  background: var(--soft);
  color: var(--blue);
  display: grid; place-items: center;
  font-size: 1.15rem;
}
.contact-tile strong { font-family: 'Montserrat', sans-serif; display: block; margin-bottom: 2px; }
.contact-tile span, .contact-tile a { font-size: .95rem; }

/* ---------- quality / value list ---------- */
.check-list { list-style: none; }
.check-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: .9rem;
  color: var(--gray);
}
.check-list li strong { color: var(--ink); }
.check-list li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  font-size: .8rem;
  font-weight: 700;
  display: grid; place-items: center;
}

/* ---------- notice ---------- */
.notice {
  border-left: 4px solid var(--blue);
  background: var(--soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.3rem;
  font-size: .95rem;
  color: var(--gray);
}

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: #AEB8CA; margin-top: 0; }
.site-footer .swoosh-top { display: block; width: 100%; height: 46px; background: var(--white); }
.site-footer .wrap { padding: 3.2rem 20px 1.5rem; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 32px;
  padding-bottom: 2.2rem;
  border-bottom: 1px solid #2A2E38;
}
.site-footer h4 {
  color: var(--white);
  font-size: .85rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: .9rem;
}
.site-footer a { color: #AEB8CA; display: inline-block; margin-bottom: .45rem; font-size: .93rem; }
.site-footer a:hover { color: var(--white); }
.site-footer p { color: #8D97AB; font-size: .93rem; }
.footer-brand img { height: 40px; margin-bottom: 1rem; background: var(--white); padding: 6px 10px; border-radius: 8px; }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding-top: 1.4rem;
  font-size: .82rem; color: #7C8699;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .grid-3, .grid-2, .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }

  .nav-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--white);
    border-bottom: 3px solid var(--blue);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 16px 16px;
    box-shadow: 0 14px 30px rgba(22,24,29,.12);
  }
  .nav.open { display: flex; }
  .nav a { padding: .8rem .6rem; }
  .nav .btn { margin: 8px 0 0; text-align: center; }
  .topbar .contact-mini { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}