/* pairnets.app: same palette and shapes as the apps and the nest's website. */
:root {
  --bg: #F3F5F8; --card: #FFFFFF; --text: #1B1F24; --muted: #6B7280; --border: #E3E7ED;
  --accent: #2563EB; --accent-hover: #1D4FC4; --accent-text: #FFFFFF;
  --subtle: #E9EDF2; --subtle-hover: #DDE3EA; --pill: #EEF2F7;
  --banner: #EAF1FE; --banner-border: #C9DAFB; --warn-pill: #FFF1DE; --warn-text: #9A4A0B;
  --ok-pill: #E3F4E7; --ok-text: #1F7A35;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161A; --card: #1D2026; --text: #E8EAED; --muted: #9AA1AB; --border: #2B2F37;
    --accent: #4C8DF6; --accent-hover: #6A9FF8; --accent-text: #0B1220;
    --subtle: #2A2E36; --subtle-hover: #343943; --pill: #262A31;
    --banner: #18243A; --banner-border: #2C4470; --warn-pill: #3A2A17; --warn-text: #F4B26A;
    --ok-pill: #16301F; --ok-text: #7FD493;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 "Segoe UI Variable Text", "Segoe UI", -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", system-ui, sans-serif;
}
[hidden] { display: none !important; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.12; letter-spacing: -.02em; margin: 0 0 16px; font-weight: 650; }
h2 { font-size: 24px; line-height: 1.25; letter-spacing: -.01em; margin: 0 0 10px; font-weight: 650; }
h3 { font-size: 17px; margin: 0 0 6px; font-weight: 650; }
p { margin: 0 0 14px; }
code { font-family: Menlo, Consolas, "DejaVu Sans Mono", monospace; font-size: .88em; background: var(--pill); padding: 2px 7px; border-radius: 6px; overflow-wrap: anywhere; }
pre { margin: 0 0 14px; padding: 14px 16px; border-radius: 12px; background: var(--pill); overflow-x: auto; font: 13.5px/1.5 Menlo, Consolas, "DejaVu Sans Mono", monospace; }
pre code { background: none; padding: 0; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.wrap { max-width: 1020px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }

header.top { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
header.top .wrap { display: flex; align-items: center; gap: 18px; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 19px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; }
nav.main { display: flex; gap: 4px; margin-left: 12px; }
nav.main a { color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 500; }
nav.main a:hover { background: var(--subtle); color: var(--text); text-decoration: none; }
nav.main a[aria-current="page"] { background: var(--subtle); color: var(--text); }
header.top .grow { flex: 1; }

.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border: 0; border-radius: 10px; font: inherit; font-weight: 650; cursor: pointer;
  background: var(--subtle); color: var(--text); text-decoration: none;
}
.button:hover { background: var(--subtle-hover); text-decoration: none; }
.button.accent { background: var(--accent); color: var(--accent-text); }
.button.accent:hover { background: var(--accent-hover); }
.button.big { padding: 14px 26px; font-size: 17px; border-radius: 12px; }
a:focus-visible, .button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.hero { padding: 72px 0 44px; text-align: center; }
.hero .lead { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 auto 28px; }
.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; align-items: center; }
.hero .others { margin-top: 14px; color: var(--muted); font-size: 15px; }
.hero .others a { margin: 0 4px; }
.hero.tight { padding-bottom: 12px; }
.gap { margin-top: 10px; }
.gap-lg { margin-top: 20px; }
.callout.spaced { margin-bottom: 22px; }

section { padding: 28px 0; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 22px; box-shadow: var(--shadow); }
.card .num { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--banner); color: var(--accent); font-weight: 700; margin-bottom: 12px; }
.card p:last-child { margin-bottom: 0; }

.downloads { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.downloads .card h3 { display: flex; align-items: center; gap: 8px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }

.callout { background: var(--banner); border: 1px solid var(--banner-border); border-radius: 14px; padding: 18px 22px; }
.callout.warn { background: var(--warn-pill); border-color: transparent; color: var(--warn-text); }
.callout p:last-child { margin-bottom: 0; }

ol.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
ol.steps > li { position: relative; padding: 4px 0 22px 52px; }
ol.steps > li::before {
  counter-increment: step; content: counter(step); position: absolute; left: 0; top: 2px;
  width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: var(--banner); color: var(--accent); font-weight: 700;
}
ol.steps > li > :last-child { margin-bottom: 0; }

details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 4px 18px; margin: 0 0 12px; }
details[open] { padding-bottom: 8px; }
summary { cursor: pointer; font-weight: 650; padding: 12px 0; }

footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; gap: 24px; flex-wrap: wrap; justify-content: space-between; }
footer p { margin: 0; max-width: 560px; }

@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 44px 0 28px; }
  .cards, .downloads { grid-template-columns: minmax(0, 1fr); }
  header.top .wrap { flex-wrap: wrap; gap: 8px 12px; }
  nav.main { margin-left: 0; order: 3; width: 100%; }
  ol.steps > li { padding-left: 46px; }
}