/**
 * IoT Secure — Control B design tokens + base layout
 */
:root {
  --iot-red: #d92b30;
  --iot-red-dark: #b5061b;
  --color-primary: var(--iot-red);
  --color-primary-dark: var(--iot-red-dark);
  --color-navy: #142b3f;
  --color-text: #000000;
  --color-muted: #4f657b;
  --font-size-base: 1.0625rem; /* 17px */
  --font-size-lg: 1.1875rem; /* 19px */
  --color-steel: #567c9e;
  --color-mid-blue: #2f5f82;
  --color-light-blue: #eaf1f6;
  --color-surface: #f7f9ff;
  --color-white: #ffffff;
  --color-border: #d9e1e8;
  --color-error: #ba1a1a;
  --color-success: #2e9d63;
  --color-amber: #f5a623;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --container-max: 1240px;
  --section-gap: clamp(3rem, 6vw, 5rem);
  --gutter: clamp(1rem, 4vw, 2rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body.site-body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body.site-body p,
body.site-body li {
  color: var(--color-text);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-text, #000);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.iot-site-header a,
.site-footer a,
a.iot-btn,
a[class*="iot-btn"],
a.iot-link,
a.iot-link-arrow,
a.iot-skip-link,
a.sr-only {
  text-decoration: none;
}

.iot-site-header a,
.site-footer a {
  color: inherit;
}

h1, h2, h3, h4 {
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--color-text);
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  width: 100%;
}

.container--narrow {
  max-width: 820px;
}

.section {
  padding-block: var(--section-gap);
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-steel);
  margin: 0 0 0.5rem;
}

.lead {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  max-width: 42rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 72px;
}

.site-logo {
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--color-navy);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-logo img {
  display: block;
  height: 40px;
  width: auto;
}

.site-nav__list {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  text-decoration: none;
  color: var(--color-muted);
  font-weight: 500;
  font-size: 0.9375rem;
}

.site-nav__link.is-active,
.site-nav__link:hover {
  color: var(--color-primary);
}

.site-header__actions {
  margin-left: auto;
}

.site-footer {
  background: var(--color-navy);
  color: var(--color-light-blue);
  padding-block: 3rem;
  margin-top: 3rem;
}

.site-footer a {
  color: var(--color-light-blue);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-white);
  text-decoration: none;
}

.site-footer__grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.site-footer__brand {
  min-width: min(100%, 260px);
}

.site-footer__logo-link {
  display: inline-block;
  margin-bottom: 1.25rem;
}

.site-footer__logo {
  display: block;
  width: auto;
  max-width: 200px;
  height: auto;
}

.site-footer__contact {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  font-size: 0.9375rem;
}

.site-footer__contact li + li {
  margin-top: 0.65rem;
}

.site-footer__contact-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-steel);
  margin-bottom: 0.2rem;
}

.site-footer__address {
  font-style: normal;
  font-size: 0.9375rem;
  line-height: 1.55;
  margin: 0;
  color: var(--color-light-blue);
}

.site-footer h3 {
  color: var(--color-white);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__col a {
  font-size: 0.9375rem;
}

.site-footer__copy {
  margin-top: 2rem;
  font-size: 0.875rem;
  opacity: 0.8;
}

@media (max-width: 900px) {
  .site-nav { display: none; }
}