:root {
  --paper: #f5f7fa;
  --ink: #17202e;
  --muted: #556070;
  --rule: #d3dae3;
  --marker: #d9363e;
  --marker-dark: #b42a31;
  --focus: #1d4ed8;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 1.0625rem/1.7 var(--serif);
}

a { color: inherit; text-decoration-color: var(--marker); text-decoration-thickness: 0.08em; text-underline-offset: 0.2em; }
a:hover { color: var(--marker-dark); }
a:focus-visible, input:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
  font-family: var(--sans);
}
.mark { font-weight: 700; letter-spacing: -0.01em; text-decoration: none; }
.mark::before {
  content: "";
  display: inline-block;
  width: 0.18em;
  height: 1em;
  margin-right: 0.5em;
  background: var(--marker);
  vertical-align: -0.15em;
}
.bar nav a { margin-left: 1.25rem; font-size: 0.9375rem; color: var(--muted); text-decoration: none; }
.bar nav a:hover { color: var(--ink); text-decoration: underline; text-decoration-color: var(--marker); }

main { max-width: 44rem; margin: 0 auto; padding: 2.5rem 1.25rem 3rem; }
main > p, main > ul, main > section > p, main > section > ul { max-width: 38rem; }

h1 {
  margin: 0 0 1rem;
  max-width: 20ch;
  font-size: clamp(2rem, 6.5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
h2 { margin: 2.25rem 0 0.5rem; font: 700 1.125rem/1.3 var(--sans); }
.lede { font-size: 1.25rem; line-height: 1.55; }
.updated { margin: 0 0 1.5rem; color: var(--muted); font-family: var(--sans); font-size: 0.9375rem; }

ul { padding-left: 1.25rem; }
li { margin: 0.5rem 0; }
code { font: 0.9em ui-monospace, "SFMono-Regular", Consolas, monospace; background: #e8edf3; padding: 0.1em 0.35em; border-radius: 3px; }

.timeline { margin: 2.5rem 0 0; }
.timeline svg { display: block; width: 100%; height: auto; }
.timeline figcaption { margin-top: 0.75rem; color: var(--muted); font: 0.9375rem/1.5 var(--sans); }

form { max-width: 22rem; margin-top: 1.5rem; font-family: var(--sans); }
label { display: block; margin-bottom: 0.35rem; font-weight: 600; }
input[type="password"] {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid #8793a3;
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: 1rem var(--sans);
}
button {
  margin-top: 1rem;
  padding: 0.7rem 1.2rem;
  border: 0;
  border-radius: 6px;
  background: var(--ink);
  color: var(--paper);
  font: 600 1rem var(--sans);
  cursor: pointer;
}
button:hover { background: #2a3850; }
.error { min-height: 1.5rem; margin: 0.75rem 0 0; color: var(--marker-dark); font-weight: 600; }

footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font: 0.9375rem/1.6 var(--sans);
}
footer p { margin: 0.25rem 0; }