:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5c6270;
  --line: #e3e6ec;
  --accent: #1668e3;
  --accent-ink: #ffffff;
  --card: #f7f8fa;
  --radius: 14px;
  --wrap: 940px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1014;
    --fg: #e8eaee;
    --muted: #99a0ad;
    --line: #232830;
    --accent: #4d95ff;
    --card: #151a20;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em; }

/* Header */
.top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--line);
  max-width: var(--wrap); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 9px; color: var(--fg); font-size: 18px; }
.brand img { border-radius: 7px; }
.top nav { display: flex; align-items: center; gap: 18px; font-size: 15px; }
.nav-cta {
  background: var(--accent); color: var(--accent-ink);
  padding: 7px 14px; border-radius: 999px; white-space: nowrap;
}
.nav-cta:hover { text-decoration: none; opacity: .9; }

main { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* Hero */
.hero { text-align: center; padding: 54px 0 30px; }
.hero h1 { font-size: 40px; line-height: 1.15; letter-spacing: -.02em; margin: 0 0 14px; }
.hero .sub { font-size: 20px; color: var(--muted); margin: 0 auto 26px; max-width: 620px; }
.shot { margin-top: 34px; border-radius: var(--radius); border: 1px solid var(--line); }

.cta {
  display: inline-block; background: var(--accent); color: var(--accent-ink);
  font-size: 17px; font-weight: 600; padding: 13px 26px; border-radius: 999px;
}
.cta:hover { text-decoration: none; opacity: .92; }
.cta-note { color: var(--muted); font-size: 14px; margin: 10px 0 0; }

/* Feature grid */
.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px; padding: 40px 0;
}
.feature {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; margin: 0;
}
.feature img { border-radius: 9px; display: block; }
.feature h3 { font-size: 18px; margin: 14px 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

/* Prose pages */
.prose { max-width: 720px; margin: 0 auto; padding: 44px 0 20px; }
.prose h1 { font-size: 32px; line-height: 1.2; letter-spacing: -.015em; margin: 0 0 16px; }
.prose h2 { font-size: 22px; margin: 38px 0 12px; }
.prose .lede { font-size: 19px; color: var(--muted); }
.steps { padding-inline-start: 22px; }
.steps li { margin-bottom: 10px; }

details {
  border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 16px; margin: 10px 0; background: var(--card);
}
details summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 2px; color: var(--muted); }

/* Router table */
.routers { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; display: block; overflow-x: auto; }
.routers th, .routers td { text-align: start; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.routers th { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }

pre {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; overflow-x: auto; font-size: 14px; margin: 6px 0 18px;
}
pre code { color: var(--fg); }

.closing { text-align: center; padding: 30px 0 60px; }
.fine { color: var(--muted); font-size: 14px; }

/* Footer */
footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 26px 20px 44px; text-align: center;
}
.langs {
  display: flex; flex-wrap: wrap; gap: 6px 14px; justify-content: center;
  font-size: 14px; margin-bottom: 14px;
}
.langs a { color: var(--muted); }
.langs a.on { color: var(--fg); font-weight: 600; }

@media (max-width: 640px) {
  .hero { padding: 34px 0 20px; }
  .hero h1 { font-size: 30px; }
  .hero .sub { font-size: 18px; }
  .prose h1 { font-size: 26px; }
  .top nav { gap: 12px; font-size: 14px; }
}