:root {
  /* Dark surfaces — match the app icon + widgets */
  --navy: #0f1a2b;
  --navy-soft: #16243a;
  --hero-top: #0e1626;
  --hero-bottom: #05070d;
  --widget-card: #1b2029;
  --widget-line: rgba(255, 255, 255, .08);

  /* Air-quality traffic light (iOS system colors) */
  --good: #34c759;
  --fair: #ffcc00;
  --poor: #ff3b30;

  /* Actions — the app's iOS blue */
  --blue: #0a84ff;
  --blue-ink: #0064d2;

  /* Light body */
  --ink: #1c2530;
  --muted: #5b6b7d;
  --line: #e4e9ef;
  --bg: #f5f6f8;
  --card: #ffffff;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); }
a:hover { color: var(--blue-ink); }

/* ---------- Header ---------- */

header.site {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: #fff;
  padding: 22px 20px;
}

header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: #fff; font-weight: 700; font-size: 20px; letter-spacing: -.2px; }
.brand .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--good); box-shadow: 0 0 12px var(--good); }

nav.site a { color: #cdd8e6; text-decoration: none; margin-left: 18px; font-size: 15px; }
nav.site a:hover { color: #fff; }

.wrap { max-width: 860px; margin: 0 auto; }

main { max-width: 860px; margin: 0 auto; padding: 48px 20px 80px; }

/* ---------- Hero (dark, widget-style) ---------- */

.hero {
  background:
    radial-gradient(120% 90% at 50% -10%, rgba(52, 199, 89, .12) 0%, rgba(10, 132, 255, .06) 38%, transparent 70%),
    linear-gradient(180deg, var(--hero-top) 0%, var(--hero-bottom) 100%);
  color: #fff;
  text-align: center;
  padding: 56px 20px 64px;
}

.hero .inner { max-width: 760px; margin: 0 auto; }

.pill {
  display: inline-block;
  background: rgba(52, 199, 89, .14);
  color: #7ee2a0;
  border: 1px solid rgba(52, 199, 89, .35);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 26px;
}

.hero h1 { font-size: 42px; line-height: 1.12; margin: 0 0 16px; letter-spacing: -.6px; color: #fff; }
.hero p.tag { font-size: 20px; color: #aeb9c8; margin: 0 auto 30px; max-width: 560px; }

/* Widget mockup card */
.widget {
  width: 340px;
  max-width: 100%;
  margin: 0 auto 34px;
  background: linear-gradient(180deg, #20262f 0%, var(--widget-card) 100%);
  border: 1px solid var(--widget-line);
  border-radius: 24px;
  padding: 20px 22px;
  text-align: left;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, .7), inset 0 1px 0 rgba(255, 255, 255, .04);
}
.widget .w-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.widget .w-room { color: #fff; font-weight: 600; font-size: 16px; }
.widget .w-refresh { color: #6f7c8c; font-size: 17px; }
.widget .w-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.widget .w-cell .w-label { display: flex; align-items: center; gap: 7px; color: #8a96a5; font-size: 12.5px; margin-bottom: 2px; }
.widget .w-cell .w-val { color: #fff; font-size: 19px; font-weight: 600; letter-spacing: -.2px; }
.widget .w-foot { color: #5d6878; font-size: 11.5px; margin-top: 16px; }

.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: none; }
.dot.good { background: var(--good); }
.dot.fair { background: var(--fair); }
.dot.poor { background: var(--poor); }

/* Sensor chips */
.chips { display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; margin: 0 auto 30px; max-width: 560px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  color: #d6deea;
  padding: 6px 13px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
}

.store-note { color: #8794a4; font-size: 14px; margin: 0; }
.store-note strong { color: #c7d1de; font-weight: 600; }

/* ---------- Screenshot gallery ---------- */

.shots {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  padding: 8px 4px 22px;
  margin: 8px -4px 0;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.shot { flex: 0 0 auto; width: 232px; scroll-snap-align: center; text-align: center; }
.shot .frame {
  background: #0b0d11;
  border-radius: 38px;
  padding: 9px;
  border: 1px solid #d3d9e2;
  box-shadow: 0 16px 40px -16px rgba(15, 26, 43, .45);
}
.shot .frame img { display: block; width: 100%; border-radius: 30px; }
.shot .cap { margin-top: 12px; font-size: 14px; color: var(--muted); font-weight: 500; }

/* ---------- Feature cards ---------- */

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin: 30px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.card .ic { width: 11px; height: 11px; border-radius: 50%; display: inline-block; margin-bottom: 12px; background: var(--good); box-shadow: 0 0 10px rgba(52, 199, 89, .5); }
.card .ic.fair { background: var(--fair); box-shadow: 0 0 10px rgba(255, 204, 0, .5); }
.card .ic.poor { background: var(--poor); box-shadow: 0 0 10px rgba(255, 59, 48, .5); }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

h1, h2, h3 { color: var(--ink); }
h2 { font-size: 25px; margin-top: 46px; letter-spacing: -.3px; }
h3 { font-size: 18px; }

.lede { font-size: 18px; color: var(--muted); }

/* Works-with chips (light) */
.devices { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0 6px; padding: 0; list-style: none; }
.devices li {
  background: var(--card); border: 1px solid var(--line); color: var(--ink);
  padding: 7px 14px; border-radius: 999px; font-size: 14px; font-weight: 500; margin: 0;
}

.note { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--good); border-radius: 10px; padding: 16px 18px; margin: 24px 0; }
.note strong { color: var(--ink); }

ol li, ul li { margin: 6px 0; }

/* ---------- Footer ---------- */

footer.site { border-top: 1px solid var(--line); padding: 30px 20px; text-align: center; color: var(--muted); font-size: 14px; }
footer.site a { color: var(--muted); margin: 0 10px; }
footer.site .disclaimer { display: block; margin-top: 14px; font-size: 12.5px; max-width: 640px; margin-left: auto; margin-right: auto; }

code { background: #eef2f7; padding: 2px 6px; border-radius: 5px; font-size: 90%; }

/* ---------- Responsive ---------- */

@media (max-width: 540px) {
  .hero { padding: 40px 18px 48px; }
  .hero h1 { font-size: 32px; }
  .hero p.tag { font-size: 18px; }
  h2 { font-size: 22px; }
}