:root {
  --ink: #14181f;
  --muted: #5b6472;
  --paper: #fbfaf7;
  --line: #dcd8cf;
  --accent: #1f4d3d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  line-height: 1.6;
}

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

.site-header,
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.site-nav form {
  display: inline;
}

.site-nav button {
  background: none;
  border: 0;
  padding: 0;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}

.site-main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 1rem;
}

.lead {
  color: var(--muted);
  font-size: 1.1rem;
}

.stack {
  display: grid;
  gap: 0.5rem;
  max-width: 22rem;
}

.stack input,
.stack button {
  font: inherit;
  padding: 0.5rem 0.6rem;
}

.error {
  color: #8b1d1d;
}