:root {
  --ink: #1f2328;
  --muted: #59636e;
  --accent: #1f4e79;
  --line: #d8dee4;
  --bg: #f6f8fa;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.55; }
header, main, footer { max-width: 900px; margin: 0 auto; padding: 0 20px; }
header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 14px; padding-top: 24px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.25rem; color: var(--accent); text-decoration: none; }
.tag { color: var(--muted); font-size: 0.92rem; }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 1.6rem; margin: 0 0 14px; }
h2 { font-size: 1.15rem; margin: 26px 0 8px; }
code { background: #eaeef2; padding: 1px 5px; border-radius: 4px; font-size: 0.9em; word-break: break-all; }
form { display: grid; gap: 6px; max-width: 560px; margin: 16px 0; }
label { font-weight: 600; font-size: 0.92rem; margin-top: 8px; }
input, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; font: inherit; background: #fff; }
button { margin-top: 12px; justify-self: start; padding: 8px 18px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; font: inherit; cursor: pointer; }
.error { color: #b42318; font-weight: 600; }
.muted { color: var(--muted); font-size: 0.9rem; }
footer { border-top: 1px solid var(--line); padding-top: 14px; padding-bottom: 28px; color: var(--muted); font-size: 0.85rem; }
.scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
table { border-collapse: collapse; font-size: 0.8rem; min-width: 100%; }
th, td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--line); vertical-align: top; white-space: nowrap; }
td.long { white-space: normal; min-width: 240px; max-width: 460px; overflow-wrap: anywhere; }
th { background: #eef1f4; position: sticky; top: 0; }
body.wide header, body.wide main, body.wide footer { max-width: none; padding-left: 24px; padding-right: 24px; }
tr.lvl1 td { background: #fff4e5; }
tr.lvl2 td { background: #fde8e8; }
tr.lvlr td { background: #e8f3ec; }