:root {
  --bg: #ffffff;
  --fg: #0f1115;
  --muted: #5b6472;
  --line: #e4e7ec;
  --accent: #2f6df6;
  --accent-soft: #eef3ff;
  --radius: 10px;
  --max: 68rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f13;
    --fg: #e8ebf0;
    --muted: #98a2b3;
    --line: #232833;
    --accent: #7ea6ff;
    --accent-soft: #161c29;
  }
}

* { box-sizing: border-box; }

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

a { color: var(--accent); }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- header ---------- */

header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

header .wrap {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-weight: 650;
  letter-spacing: -.01em;
  color: var(--fg);
  text-decoration: none;
  margin-right: auto;
}

.brand img { width: 26px; height: 26px; display: block; }

nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .925rem;
}

nav a:hover, nav a[aria-current="page"] { color: var(--fg); }

/* ---------- sections ---------- */

.hero { padding: 4.5rem 0 3rem; }

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -.03em;
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 44rem;
  margin: 0 0 1.75rem;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: .65rem 1.15rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 550;
  font-size: .95rem;
}

.btn.ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  padding: 2rem 0 3.5rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.card h3 { margin: 0 0 .4rem; font-size: 1rem; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--muted); font-size: .925rem; }

h2 {
  font-size: 1.5rem;
  letter-spacing: -.02em;
  margin: 2.5rem 0 .75rem;
}

/* ---------- tables ---------- */

.scroll { overflow-x: auto; margin: 1rem 0 2rem; }

table { border-collapse: collapse; width: 100%; min-width: 34rem; font-size: .925rem; }
th, td { text-align: left; padding: .7rem .8rem; border-bottom: 1px solid var(--line); }
th { font-weight: 600; }
td.muted { color: var(--muted); }

/* ---------- article ---------- */

article { max-width: 44rem; padding-bottom: 3rem; }
article p { color: var(--fg); }
article code {
  background: var(--accent-soft);
  padding: .12em .38em;
  border-radius: 5px;
  font-size: .875em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

pre {
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-size: .85rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.meta { color: var(--muted); font-size: .875rem; margin: 0 0 1.5rem; }

.postlist { list-style: none; padding: 0; margin: 1rem 0 3rem; }
.postlist li { border-bottom: 1px solid var(--line); padding: 1rem 0; }
.postlist a { font-weight: 550; text-decoration: none; }
.postlist span { display: block; color: var(--muted); font-size: .9rem; margin-top: .2rem; }

/* ---------- diagnostics panel ---------- */

.diag {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 0 0 3rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .85rem;
}

.diag h3 {
  margin: 0 0 .6rem;
  font-family: inherit;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}

.diag dl { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1rem; margin: 0; }
.diag dt { color: var(--muted); }
.diag dd { margin: 0; word-break: break-all; }

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: .9rem;
}

footer .wrap { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: space-between; }
footer a { color: var(--muted); }