:root {
  --ink: #1d2433;
  --muted: #5b6475;
  --line: #e2e6ee;
  --paper: #ffffff;
  --ground: #f6f7fb;
  --accent: #3b5bdb;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6e9f0;
    --muted: #a3abbd;
    --line: #2c3342;
    --paper: #171b24;
    --ground: #10131a;
    --accent: #8ea2ff;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 2.5rem 1rem 3rem;
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 60rem; margin: 0 auto; }
.eyebrow { color: var(--muted); font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; margin: 0; }
h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); margin: 0.3rem 0 0.5rem; }
.lead { font-size: 1.1rem; color: var(--muted); margin: 0 0 1.5rem; }
section {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}
h2 { font-size: 1.2rem; margin: 0 0 0.75rem; color: var(--accent); }
h3 { font-size: 1rem; margin: 0 0 0.5rem; }
ol, ul { padding-left: 1.3rem; margin: 0; }
li { margin: 0.3rem 0; }
.flow li::marker { color: var(--accent); font-weight: 700; }
table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 0.5rem 0.6rem; border-top: 1px solid var(--line); vertical-align: top; }
thead th { border-top: none; color: var(--muted); font-weight: 600; font-size: 0.9rem; }
tbody td:first-child, tr > th { white-space: nowrap; font-weight: 600; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; background: var(--ground); padding: 0.1em 0.35em; border-radius: 4px; }
pre.code { background: var(--ground); border: 1px solid var(--line); border-radius: 8px; padding: 0.8rem 1rem; overflow-x: auto; margin: 0.9rem 0 0; font-size: 0.85rem; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1.25rem; }
footer { color: var(--muted); font-size: 0.85rem; margin-top: 1.5rem; }
[hidden] { display: none !important; }
label { display: block; font-weight: 600; margin-bottom: 0.4rem; }
.row { display: flex; gap: 0.5rem; flex-wrap: wrap; }
input[type="password"] {
  flex: 1 1 14rem; padding: 0.6rem 0.75rem; font: inherit; color: var(--ink);
  background: var(--ground); border: 1px solid var(--line); border-radius: 8px;
}
button {
  padding: 0.6rem 1.2rem; font: inherit; font-weight: 600; color: #fff;
  background: var(--accent); border: 0; border-radius: 8px; cursor: pointer;
}
#message { color: var(--muted); min-height: 1.5em; margin: 0.6rem 0 0; }