:root {
  --bg: #0B2036;
  --bg-alt: #0E2740;
  --panel: #132B45;
  --border: #2C4A63;
  --accent: #12B7C4;
  --accent-hover: #0FA3AF;
  --text: #F4F8F9;
  --text-2: #AEC0CC;
  --text-3: #7F95A5;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent); }
a:hover { color: var(--text); }
img { display: block; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px;
}
.skip:focus { left: 16px; top: 16px; background: var(--accent); color: var(--bg); padding: 8px 12px; border-radius: 8px; z-index: 10; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: rgba(11, 32, 54, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(44, 74, 99, 0.5);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-name { font-size: 20px; font-weight: 600; letter-spacing: 0.2px; }
.brand-name span { color: var(--accent); }
nav { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
nav a { color: var(--text-2); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--text); }

/* buttons */
.btn {
  display: inline-block; text-decoration: none; font-weight: 500;
  border-radius: 10px; padding: 13px 24px; font-size: 16px;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-hover); color: var(--bg); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--text-3); background: rgba(255, 255, 255, 0.04); color: var(--text); }
.btn-small { padding: 7px 14px; font-size: 14px; }

/* hero */
.hero { padding-block: 72px 56px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 24px;
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px;
  font-size: 13px; color: var(--text-2);
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
h1 { margin: 0; font-size: clamp(36px, 5.4vw, 62px); line-height: 1.08; font-weight: 600; letter-spacing: -0.5px; }
.lead { margin: 24px 0 0; font-size: 19px; color: var(--text-2); max-width: 580px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.hero-figure { margin: 0; }
.hero-figure svg { width: 100%; height: auto; }
.ring { fill: none; stroke: var(--accent); stroke-width: 1.2; opacity: 0.28; stroke-dasharray: 4 6; }
.ring-2 { opacity: 0.18; }
.link { fill: none; stroke: var(--accent); stroke-width: 2; }
.link-thin { stroke-width: 1.3; opacity: 0.6; stroke-dasharray: 3 4; }
.node { fill: var(--panel); stroke: var(--border); stroke-width: 1.5; }
.node-accent { stroke: var(--accent); }
.glyph { fill: #2C4A63; }
.led { fill: var(--accent); }
.device rect { fill: #F4F8F9; }
.device .pin { fill: var(--accent); }
.label { fill: var(--text); font: 600 12px var(--font); }
.label-sm { fill: var(--text-2); font: 12px var(--font); }

/* sections */
.section { padding-block: 80px; }
.section-alt { background: var(--bg-alt); border-block: 1px solid rgba(44, 74, 99, 0.45); }
h2 { margin: 0 0 16px; font-size: clamp(28px, 3.4vw, 38px); line-height: 1.15; font-weight: 600; }
.h2-small { font-size: 24px; }
h3 { margin: 0 0 6px; font-size: 18px; font-weight: 600; }
.section-lead { margin: 0 0 40px; max-width: 760px; color: var(--text-2); font-size: 18px; }
p { margin: 0 0 16px; }
.section p { color: var(--text-2); }

.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px;
}
.card p { margin: 0; font-size: 15.5px; }

.two-col { display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; align-items: start; }
.two-col > *, .hero-grid > * { min-width: 0; }

.channels { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.channels li {
  display: flex; justify-content: space-between; gap: 16px; align-items: baseline;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px 18px;
}
.channels span { color: var(--text-3); font-size: 14.5px; text-align: right; }

.tag {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.4px; text-transform: uppercase;
  border-radius: 6px; padding: 3px 8px; margin-right: 6px; vertical-align: 1px;
}
.tag-planned { color: var(--accent); border: 1px solid rgba(18, 183, 196, 0.5); background: rgba(18, 183, 196, 0.08); }
.tag-today { color: #9BE3B4; border: 1px solid rgba(155, 227, 180, 0.45); background: rgba(155, 227, 180, 0.08); }
.status {
  margin: 20px 0 0; max-width: 580px; font-size: 15px; color: var(--text-2);
  border-left: 2px solid #E8B04B; padding-left: 14px;
}
.status strong { color: #F1C878; }
.stories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.story {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column;
}
.story p { font-size: 15.5px; }
.story .needs { margin: auto 0 0; padding-top: 6px; font-size: 13.5px; color: var(--text-3); }
.note { font-size: 15.5px; border-left: 2px solid var(--accent); padding-left: 14px; }

.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px 32px; }
.feature { border-top: 1px solid var(--border); padding-top: 18px; }
.feature p { margin: 0; font-size: 15.5px; }

.roadmap { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; max-width: 820px; }
.roadmap li {
  display: grid; grid-template-columns: 96px 1fr; gap: 16px; align-items: start;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px;
}
.roadmap .tag { justify-self: start; margin-top: 2px; }
.roadmap p { margin: 0; }

pre {
  background: #071726; border: 1px solid var(--border); border-radius: 10px;
  padding: 18px 20px; overflow-x: auto; margin: 0 0 20px;
}
code { font-family: var(--mono); font-size: 14px; color: var(--text); }
p code { background: var(--panel); border-radius: 5px; padding: 1px 6px; }

.family { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.family li { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.family a { text-decoration: none; }
.family span { display: block; color: var(--text-2); font-size: 15px; margin-top: 2px; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding-block: 40px 48px; }
.footer-row { display: grid; gap: 10px; }
.site-footer p { margin: 0; color: var(--text-2); font-size: 14.5px; }
.fineprint { color: var(--text-3) !important; font-size: 13.5px !important; }

@media (max-width: 980px) {
  .cards, .features, .stories { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .hero { padding-top: 40px; }
  .hero-grid, .two-col { grid-template-columns: 1fr; gap: 32px; }
  nav a:not(.btn) { display: none; }
  .section { padding-block: 56px; }
}
@media (max-width: 540px) {
  .cards, .features, .stories { grid-template-columns: 1fr; }
  .roadmap li { grid-template-columns: 1fr; gap: 8px; }
  .channels li { flex-direction: column; gap: 2px; }
  .channels span { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}