:root {
  --bg: #f7f5f2;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #0b5f3a;
  --border: #ddd6cc;
  --banner-bg: #fff6e5;
  --banner-border: #e6c98a;
  --max: 42rem;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(ellipse at top left, #e8f0ea 0%, transparent 55%),
    linear-gradient(180deg, #faf8f5 0%, var(--bg) 100%);
  min-height: 100vh;
}

header,
main,
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

header {
  padding-top: 2rem;
  padding-bottom: 1rem;
}

.brand {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.5rem;
}

h1 {
  font-size: 1.85rem;
  line-height: 1.25;
  margin: 0 0 0.35rem;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 1.25rem;
}

.banner {
  background: var(--banner-bg);
  border: 1px solid var(--banner-border);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  font-size: 0.92rem;
  margin-bottom: 1.75rem;
}

nav.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

nav.links a {
  color: var(--accent);
}

h2 {
  font-size: 1.2rem;
  margin: 1.75rem 0 0.5rem;
}

h3 {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.4rem;
}

p,
li {
  color: var(--ink);
}

ul,
ol {
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.35rem;
}

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

.todo {
  background: #fff0f0;
  border: 1px dashed #d88;
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0.75rem 0 1rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #efeae3;
}

footer {
  padding: 2rem 1.25rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
}

footer a {
  color: var(--muted);
}