* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --blue-900: #042C53;
  --blue-800: #0C447C;
  --blue-600: #185FA5;
  --blue-400: #378ADD;
  --blue-100: #B5D4F4;
  --blue-50: #E6F1FB;
  --teal-800: #085041;
  --teal-600: #0F6E56;
  --teal-100: #9FE1CB;
  --teal-50: #E1F5EE;
  --amber-600: #854F0B;
  --amber-100: #FAC775;
  --amber-50: #FAEEDA;
  --gray-900: #2C2C2A;
  --gray-600: #5F5E5A;
  --gray-400: #888780;
  --gray-200: #B4B2A9;
  --gray-50: #F1EFE8;
  --bg: #FFFFFF;
}
html { scroll-behavior: smooth; }
body { font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--gray-900); background: var(--bg); line-height: 1.65; font-size: 16px; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-alt { background: var(--gray-50); }
h1 { font-size: 40px; font-weight: 600; line-height: 1.25; letter-spacing: -0.5px; }
h2 { font-size: 30px; font-weight: 600; line-height: 1.3; margin-bottom: 12px; }
h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
p.lead { font-size: 18px; color: var(--gray-600); max-width: 640px; }
.center { text-align: center; }
.center p.lead { margin: 0 auto; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.96); border-bottom: 1px solid var(--gray-200); backdrop-filter: blur(6px); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 600; color: var(--blue-800); }
.brand-mark { width: 34px; height: 34px; border-radius: 8px; background: var(--blue-800); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; letter-spacing: 0.5px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--gray-900); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--blue-600); text-decoration: none; }
.nav-cta { background: var(--blue-600); color: #fff !important; padding: 9px 20px; border-radius: 6px; font-weight: 500; }
.nav-cta:hover { background: var(--blue-800); }
@media (max-width: 860px) { .nav-links { display: none; } }

/* Hero */
.hero { background: linear-gradient(180deg, var(--blue-50) 0%, #fff 100%); padding: 96px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 span { color: var(--blue-600); }
.hero p.lead { margin-top: 18px; }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 28px; border-radius: 6px; font-size: 16px; font-weight: 500; border: 1.5px solid transparent; }
.btn-primary { background: var(--blue-600); color: #fff; }
.btn-primary:hover { background: var(--blue-800); text-decoration: none; }
.btn-outline { border-color: var(--blue-600); color: var(--blue-600); }
.btn-outline:hover { background: var(--blue-50); text-decoration: none; }
.trust-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 34px; }
.badge { font-size: 13px; font-weight: 500; color: var(--teal-800); background: var(--teal-50); border: 1px solid var(--teal-100); padding: 6px 14px; border-radius: 999px; }

/* Product visual placeholder */
.hero-visual { background: var(--blue-800); border-radius: 16px; padding: 40px 36px; color: #fff; }
.hero-visual .sensor-card { background: rgba(255,255,255,0.10); border: 1px solid rgba(255,255,255,0.22); border-radius: 12px; padding: 22px; }
.hero-visual .sensor-title { font-size: 15px; font-weight: 600; color: var(--blue-100); }
.hero-visual .model { font-size: 26px; font-weight: 600; margin: 4px 0 10px; }
.hero-visual ul { list-style: none; font-size: 14px; color: rgba(255,255,255,0.85); }
.hero-visual li { padding: 5px 0 5px 22px; position: relative; }
.hero-visual li::before { content: ""; position: absolute; left: 0; top: 12px; width: 8px; height: 8px; border-radius: 2px; background: var(--teal-100); }
.hero-visual .note { font-size: 12px; color: var(--amber-100); margin-top: 16px; }

/* Cards & grids */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; } }
.card { background: #fff; border: 1px solid var(--gray-200); border-radius: 12px; padding: 28px; }
.card:hover { border-color: var(--blue-400); }
.card .icon { width: 44px; height: 44px; border-radius: 10px; background: var(--blue-50); color: var(--blue-800); display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 16px; }
.card h3 { font-size: 18px; }
.card p { font-size: 14.5px; color: var(--gray-600); margin-top: 6px; }
.card .link { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: 500; }

/* Image placeholder */
.img-ph { border-radius: 10px; border: 1.5px dashed var(--gray-400); background: var(--gray-50); display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--gray-400); font-size: 13px; min-height: 160px; text-align: center; padding: 16px; }
.img-ph .ph-icon { font-size: 26px; margin-bottom: 6px; }

/* Spec tables */
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin-top: 20px; background: #fff; }
.spec-table th { background: var(--blue-800); color: #fff; text-align: left; padding: 12px 16px; font-weight: 500; }
.spec-table td { padding: 11px 16px; border: 1px solid var(--gray-200); vertical-align: top; }
.spec-table tr td:first-child { font-weight: 500; color: var(--gray-900); background: var(--gray-50); width: 30%; }
.spec-table tr:nth-child(even) td:last-child { background: #FAFBFC; }
.tbd { color: var(--amber-600); font-size: 12px; }

/* Applications */
.app-row { display: grid; grid-template-columns: 64px 1fr 220px; gap: 20px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--gray-200); }
.app-row:last-child { border-bottom: none; }
.app-icon { width: 56px; height: 56px; border-radius: 12px; background: var(--blue-50); color: var(--blue-800); display: flex; align-items: center; justify-content: center; font-size: 24px; }
.app-rec { font-size: 13px; color: var(--teal-800); background: var(--teal-50); border: 1px solid var(--teal-100); padding: 8px 14px; border-radius: 8px; text-align: center; font-weight: 500; }
@media (max-width: 720px) { .app-row { grid-template-columns: 56px 1fr; } .app-rec { grid-column: 2; justify-self: start; } }

/* Market tags */
.market-tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 32px; }
.market-tag { background: #fff; border: 1px solid var(--gray-200); border-radius: 999px; padding: 10px 22px; font-size: 15px; font-weight: 500; color: var(--gray-900); }
.market-tag strong { color: var(--blue-600); }

/* CTA band */
.cta-band { background: var(--blue-800); color: #fff; padding: 64px 0; }
.cta-band h2 { color: #fff; }
.cta-band p { color: var(--blue-100); margin-bottom: 28px; font-size: 17px; }
.btn-white { background: #fff; color: var(--blue-800); }
.btn-white:hover { background: var(--blue-100); text-decoration: none; }

/* Forms */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 13.5px; font-weight: 500; color: var(--gray-900); }
.form-field label .req { color: #C0392B; }
.form-field input, .form-field select, .form-field textarea { padding: 11px 14px; border: 1px solid var(--gray-200); border-radius: 8px; font-size: 15px; font-family: inherit; background: #fff; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: 2px solid var(--blue-400); border-color: var(--blue-400); }
.form-note { font-size: 13px; color: var(--gray-400); margin-top: 14px; }

/* FAQ */
.faq-item { border: 1px solid var(--gray-200); border-radius: 10px; margin-bottom: 14px; background: #fff; }
.faq-item details summary { cursor: pointer; padding: 18px 22px; font-size: 16px; font-weight: 500; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item details summary::after { content: "+"; font-size: 20px; color: var(--blue-600); }
.faq-item details[open] summary::after { content: "−"; }
.faq-item details .faq-body { padding: 0 22px 18px; font-size: 14.5px; color: var(--gray-600); }

/* Page header (subpages) */
.page-head { background: var(--blue-50); padding: 64px 0 48px; }
.page-head .crumb { font-size: 13px; color: var(--gray-400); margin-bottom: 12px; }
.page-head h1 { font-size: 34px; }

/* Footer */
.site-footer { background: var(--gray-900); color: var(--gray-200); padding: 56px 0 32px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.site-footer h4 { color: #fff; font-size: 15px; font-weight: 500; margin-bottom: 14px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 9px; }
.site-footer a { color: var(--gray-400); font-size: 14px; }
.site-footer a:hover { color: #fff; }
.footer-about { font-size: 14px; color: var(--gray-400); margin-top: 12px; max-width: 320px; }
.footer-bottom { border-top: 1px solid var(--gray-600); margin-top: 44px; padding-top: 24px; font-size: 13px; color: var(--gray-400); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* Notice strip */
.notice-strip { background: var(--amber-50); border: 1px solid var(--amber-100); border-radius: 10px; padding: 14px 18px; font-size: 13.5px; color: var(--amber-600); margin: 24px 0; }

.brand-logo { height: 40px; width: auto; border-radius: 0; display: block; }
.footer-grid .brand-logo { height: 34px; }

.brand-logo { height: 40px; width: auto; border-radius: 0; display: block; }
.footer-grid .brand-logo { height: 34px; }