:root {
  --bg: #0d1117;
  --panel: #151b23;
  --border: #2a3038;
  --fg: #e6edf3;
  --muted: #9aa4b2;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --code-bg: #0a0e14;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* nav */
nav {
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, .85);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
nav .wrap { display: flex; align-items: center; gap: 24px; height: 58px; }
nav .brand { font-weight: 700; color: var(--fg); }
nav a.link { color: var(--muted); font-size: 15px; }
nav a.link:hover, nav a.link[aria-current="page"] { color: var(--fg); text-decoration: none; }
nav .spacer { margin-left: auto; }

/* hero */
header.hero { padding: 64px 0 40px; }
header.hero h1 { font-size: 42px; line-height: 1.15; margin: 0 0 12px; letter-spacing: -.02em; }
header.hero .tagline { font-size: 19px; color: var(--muted); margin: 0 0 24px; max-width: 62ch; }
.contact { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 15px; color: var(--muted); }

section { padding: 36px 0; border-top: 1px solid var(--border); }
h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 24px; font-weight: 600; }
h3 { font-size: 18px; margin: 0 0 4px; }

.item { margin-bottom: 28px; }
.item:last-child { margin-bottom: 0; }
.item .meta { color: var(--muted); font-size: 14px; margin: 0 0 10px; }
.item .meta .company { color: var(--accent2); }
.item ul { margin: 0; padding-left: 18px; color: #c9d1d9; }
.item li { margin-bottom: 6px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font: 13px/1 var(--mono);
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: var(--panel);
}

.cta {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent);
  font-weight: 600;
}
.cta:hover { background: var(--accent); color: #06111f; text-decoration: none; }

footer { border-top: 1px solid var(--border); padding: 28px 0 60px; color: var(--muted); font-size: 14px; }

/* guide page */
.guide h1 { font-size: 34px; margin: 0 0 10px; letter-spacing: -.02em; }
.lead { color: var(--muted); font-size: 18px; max-width: 65ch; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  margin: 18px 0;
}
.card h3 { margin-top: 0; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  font: 13.5px/1.6 var(--mono);
  color: #d7e0ea;
}
code { font: .9em var(--mono); background: #1b2028; padding: 2px 5px; border-radius: 4px; }
pre code { background: none; padding: 0; font-size: inherit; }

.prompt {
  border-left: 3px solid var(--accent2);
  background: var(--code-bg);
  padding: 14px 16px;
  border-radius: 0 8px 8px 0;
  font: 14px/1.6 var(--mono);
  color: #d7e0ea;
  white-space: pre-wrap;
  margin: 12px 0;
}

figure { margin: 24px 0; }
figure img {
  width: 100%;
  display: block;
  border: 1px solid var(--border);
  border-radius: 10px;
}
figcaption { color: var(--muted); font-size: 14px; margin-top: 8px; }

.note {
  border-left: 3px solid #d29922;
  background: #1c1810;
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  font-size: 15px;
  margin: 16px 0;
}

ol.steps { padding-left: 20px; }
ol.steps > li { margin-bottom: 26px; }

table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 16px 0; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }

@media (max-width: 600px) {
  header.hero h1 { font-size: 32px; }
  nav .wrap { gap: 14px; }
}