:root {
  color-scheme: dark;
  --bg: #0b1220;
  --panel: #132037;
  --text: #eef3fb;
  --muted: #b2bfd4;
  --line: #2c3c56;
  --accent: #78d9ec;
  --warning: #ffe1a6;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, "Segoe UI", sans-serif; line-height: 1.65; }
a { color: var(--accent); text-underline-offset: .22em; }
a:hover { text-decoration-thickness: .15em; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
.skip { position: absolute; top: -100px; left: 1rem; z-index: 2; background: var(--panel); padding: .6rem 1rem; }
.skip:focus { top: 1rem; }
.container { width: min(1120px, calc(100% - 3rem)); margin-inline: auto; }
header { border-bottom: 1px solid var(--line); }
.nav { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 1.25rem; flex-wrap: wrap; padding-block: 1rem; }
.brand { color: var(--text); font-size: 1.35rem; font-weight: 750; display: flex; align-items: center; gap: .65rem; text-decoration: none; }
.brand img { width: 32px; height: 32px; }
nav { display: flex; flex-wrap: wrap; gap: 1.4rem; }
nav a { color: var(--muted); font-size: .95rem; text-decoration: none; }
nav a[aria-current="page"], nav a:hover { color: var(--text); }
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 3.5rem; align-items: center; padding-block: 5.5rem; }
.eyebrow { color: var(--accent); letter-spacing: .14em; font-size: .8rem; font-weight: 700; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.025em; }
h1 { font-size: clamp(2.5rem, 5vw, 4.3rem); margin: .8rem 0 1.3rem; }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 0 0 1rem; }
h3 { font-size: 1.35rem; margin: 0 0 .75rem; }
p { margin: 0 0 1rem; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 62ch; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.button { display: inline-block; border: 1px solid var(--line); border-radius: 9px; padding: .7rem 1.15rem; font-weight: 650; text-decoration: none; color: var(--text); }
.button.primary { background: var(--accent); color: #102233; border-color: var(--accent); }
.button:hover { background: #243855; }
.button.primary:hover { background: #a1e8f3; }
.flow { border: 1px solid var(--line); border-radius: 18px; padding: 2rem; background: linear-gradient(150deg, #192c48, var(--panel)); }
.device { border: 1px solid #496484; border-radius: 10px; padding: 1.2rem; background: var(--bg); }
.device strong { font-size: 1.25rem; display: block; }
.device span { color: var(--muted); font-size: .9rem; }
.connection { text-align: center; color: var(--accent); padding: 1.25rem .25rem; font-size: .92rem; }
.connection::before { content: "\2193"; display: block; font-size: 1.6rem; line-height: 1.2; margin-bottom: .4rem; }
.section { padding-block: 3.5rem; border-top: 1px solid var(--line); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-top: 2rem; }
.card { padding: 1.75rem; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.card p, .card li { color: var(--muted); }
.badge { display: inline-block; background: #243855; border-radius: 5px; padding: .2rem .55rem; font-size: .78rem; margin-bottom: 1rem; }
.badge.planned { color: var(--warning); }
.notice { padding: 1.3rem 1.5rem; border: 1px solid #6f5736; border-radius: 10px; background: #2a241c; color: var(--warning); }
.notice p:last-child { margin-bottom: 0; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; padding-left: 1.3rem; margin-top: 2rem; }
.steps li { padding-left: .4rem; }
.steps strong { display: block; margin-bottom: .4rem; }
.steps span { color: var(--muted); }
details { padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 650; }
details p { color: var(--muted); margin: .85rem 0 0; max-width: 85ch; }
footer { padding-block: 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.document { max-width: 850px; padding-block: 3.5rem; }
.document h1 { font-size: clamp(2.2rem, 4vw, 3.2rem); }
.document h2 { font-size: 1.5rem; margin-top: 2.5rem; }
.document h3 { margin-top: 1.7rem; }
.document li { margin-bottom: .75rem; }
.document code { overflow-wrap: anywhere; background: var(--panel); padding: .12rem .3rem; border-radius: 4px; font-size: .9em; }
.document .updated { color: var(--muted); font-size: .9rem; }
.privacy-link { margin-top: 1.4rem; }
@media (max-width: 850px) {
  .hero { grid-template-columns: 1fr; padding-block: 3.5rem; gap: 2.5rem; }
  .flow { max-width: 520px; }
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 1.2rem; }
}
@media (max-width: 450px) {
  .container { width: calc(100% - 2rem); }
  nav { gap: 1rem; }
  .hero { padding-block: 2.5rem; }
  .flow, .card { padding: 1.25rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }