/* ===== Javeri Tubes — shared styles ===== */
:root {
  --blue: #0E6CB8;
  --blue-dark: #0A4F88;
  --ink: #16181d;
  --grey: #555b66;
  --light: #f4f6f9;
  --border: #e4e8ee;
  --white: #ffffff;
  --maxw: 1160px;
  --radius: 8px;
  --shadow: 0 2px 14px rgba(16, 42, 67, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

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

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { line-height: 1.2; color: var(--ink); }
h2.section-title { font-size: 1.9rem; margin-bottom: 8px; }
.section-sub { color: var(--grey); max-width: 680px; margin-bottom: 36px; }

.section { padding: 72px 0; }
.section.alt { background: var(--light); }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.nav .logo img { height: 46px; width: auto; }
.nav-links { display: flex; gap: 30px; list-style: none; align-items: center; }
.nav-links a {
  color: var(--ink); font-weight: 500; font-size: 0.98rem;
  padding: 6px 0; border-bottom: 2px solid transparent;
}
.nav-links a:hover, .nav-links a.active { color: var(--blue); border-bottom-color: var(--blue); }
.nav-cta {
  background: var(--blue); color: #fff !important; padding: 10px 20px;
  border-radius: var(--radius); border-bottom: none !important;
}
.nav-cta:hover { background: var(--blue-dark); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; font-size: 1.6rem; color: var(--ink); }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(115deg, #0b2c47 0%, #0E6CB8 100%);
  color: #fff;
}
.hero-inner {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px;
  align-items: center; padding: 90px 0;
}
.hero h1 { font-size: 2.8rem; color: #fff; margin-bottom: 18px; }
.hero p { font-size: 1.15rem; color: #dce8f3; margin-bottom: 30px; max-width: 540px; }
.hero .eyebrow {
  display: inline-block; font-size: 0.8rem; letter-spacing: 2px; text-transform: uppercase;
  color: #9fd0f5; margin-bottom: 18px; font-weight: 600;
}
.hero-card {
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.18);
  border-radius: 12px; padding: 28px;
}
.hero-card ul { list-style: none; }
.hero-card li { padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.12); color: #eaf3fb; font-weight: 500; }
.hero-card li:last-child { border-bottom: none; }
.hero-card li span { color: #9fd0f5; margin-right: 10px; font-weight: 700; }

/* Page hero (inner pages) */
.page-hero {
  background: linear-gradient(115deg, #0b2c47 0%, #0E6CB8 100%);
  color: #fff; padding: 64px 0;
}
.page-hero h1 { color: #fff; font-size: 2.3rem; }
.page-hero p { color: #dce8f3; max-width: 640px; margin-top: 10px; }

/* ===== Buttons ===== */
.btn {
  display: inline-block; background: #fff; color: var(--blue);
  padding: 13px 26px; border-radius: var(--radius); font-weight: 600;
  border: 2px solid #fff; cursor: pointer; transition: background .15s, color .15s;
}
.btn:hover { background: transparent; color: #fff; }
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; }
.hero .btn-ghost { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.6); margin-left: 12px; }
.hero .btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

/* ===== Cards / grids ===== */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.card h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--blue-dark); }
.card p { color: var(--grey); font-size: 0.97rem; }
.card .icon {
  width: 46px; height: 46px; border-radius: 10px; background: #e8f1fa; color: var(--blue);
  display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 700; margin-bottom: 14px;
}

/* Product cards */
.product-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.product-card .thumb { background: #fff; height: 200px; display: flex; align-items: center; justify-content: center; padding: 18px; border-bottom: 1px solid var(--border); }
.product-card .thumb img { max-height: 100%; width: auto; object-fit: contain; }
.product-card .body { padding: 20px 22px; }
.product-card h3 { color: var(--blue-dark); font-size: 1.1rem; margin-bottom: 6px; }
.product-card p { color: var(--grey); font-size: 0.93rem; }

/* spec table */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 18px; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.spec-table th, .spec-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.spec-table th { background: var(--blue); color: #fff; font-weight: 600; }
.spec-table tr:nth-child(even) td { background: #f8fafc; }

/* feature list with check */
.checklist { list-style: none; }
.checklist li { padding: 9px 0 9px 30px; position: relative; color: var(--grey); }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }

/* split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }

/* customers */
.customer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.customer-chip {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 20px; text-align: center; font-weight: 600; color: var(--grey);
  box-shadow: var(--shadow); display: flex; align-items: center; justify-content: center; min-height: 120px;
}
.customer-chip img { max-height: 80px; max-width: 100%; width: auto; object-fit: contain; }
.placeholder-note { background: #fff7e6; border: 1px dashed #e0a800; color: #8a6d00; padding: 10px 14px; border-radius: 6px; font-size: 0.85rem; margin-bottom: 20px; display: inline-block; }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; }
.contact-info p { margin-bottom: 14px; color: var(--grey); }
.contact-info .label { font-weight: 600; color: var(--ink); display: block; }
.map-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border); }
.map-wrap iframe { width: 100%; height: 320px; border: 0; display: block; }
form .field { margin-bottom: 16px; }
form label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; }
form input, form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 0.97rem; font-family: inherit; background: #fff;
}
form input:focus, form textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(14,108,184,0.12); }

/* download cards */
.download-card { display: flex; flex-direction: column; gap: 16px; align-items: flex-start; justify-content: space-between; }
.download-card h3 { margin-bottom: 6px; }

/* CTA band */
.cta-band { background: var(--blue); color: #fff; text-align: center; padding: 58px 0; }
.cta-band h2 { color: #fff; font-size: 1.8rem; margin-bottom: 10px; }
.cta-band p { color: #dce8f3; margin-bottom: 24px; }

/* ===== Footer ===== */
.site-footer { background: #0d1117; color: #aeb6c2; padding: 50px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; margin-bottom: 30px; }
.site-footer h4 { color: #fff; margin-bottom: 14px; font-size: 1rem; }
.site-footer a { color: #aeb6c2; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 9px; }
.footer-logo { background: #fff; padding: 10px 14px; border-radius: 8px; display: inline-block; margin-bottom: 16px; }
.footer-logo img { height: 40px; }
.footer-bottom { border-top: 1px solid #232a35; padding-top: 18px; font-size: 0.85rem; text-align: center; color: #79828f; }

/* ===== Responsive ===== */
@media (max-width: 880px) {
  .nav-links {
    display: none; position: absolute; top: 76px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 16px 24px; gap: 4px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: block; }
  .hero-inner, .split, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 2.1rem; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .customer-grid { grid-template-columns: repeat