:root {
  --bg: #fbfcfa;
  --fg: #172019;
  --muted: #56615a;
  --line: #d3dbd5;
  --code-bg: #eef3ef;
  --link: #0a6b4f;
  --accent: #e08a00;
  --band: #123d2f;
  --band-fg: #f2f7f3;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101512;
    --fg: #e3ebe5;
    --muted: #9caba1;
    --line: #2b3830;
    --code-bg: #18211b;
    --link: #6fd3ad;
    --accent: #f5ae3d;
    --band: #0b2a20;
    --band-fg: #e3ebe5;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

header {
  background: var(--band);
  color: var(--band-fg);
}

header .wrap, main, footer {
  max-width: 54rem;
  margin: 0 auto;
  padding: 0 1rem;
}

header .wrap { padding-top: 1.1rem; }

header .brand {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--band-fg);
  text-decoration: none;
}

header .brand img {
  vertical-align: middle;
  margin-right: 0.45em;
}

header nav a { color: var(--band-fg); text-decoration: none; opacity: 0.9; }
header nav a:hover, header nav a:focus { text-decoration: underline; opacity: 1; }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.1rem;
  padding: 0.5rem 0 0.8rem;
  font-size: 0.95rem;
}

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

footer {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  padding-bottom: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer nav { padding: 0 0 0.5rem; }

h1 { font-size: 1.85rem; line-height: 1.25; margin: 1.2rem 0 0.5rem; }
h2 { font-size: 1.35rem; margin: 2.2rem 0 0.5rem; padding-bottom: 0.2rem; border-bottom: 2px solid var(--line); }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.4rem; }

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

.lead { font-size: 1.12rem; }
.muted { color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.8rem;
  margin: 1rem 0;
}

.card {
  border: 1px solid var(--line);
  border-top: 4px solid var(--link);
  border-radius: 6px;
  padding: 0.6rem 0.9rem 0.8rem;
}

.card h3 { margin-top: 0.3rem; }
.card p { margin: 0.3rem 0; }

.price { font-weight: 700; white-space: nowrap; }

.todo {
  border-left: 4px solid var(--accent);
  padding: 0.4rem 0.75rem;
  background: var(--code-bg);
  font-size: 0.95rem;
}

.note {
  border-left: 4px solid var(--link);
  padding: 0.4rem 0.75rem;
  background: var(--code-bg);
}

code, pre, kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
}

code {
  background: var(--code-bg);
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
  overflow-wrap: anywhere;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.75rem;
  overflow-x: auto;
  line-height: 1.4;
}

pre code { background: none; padding: 0; overflow-wrap: normal; }

.table-wrap { overflow-x: auto; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.5rem 0 1rem;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--line);
  padding: 0.35rem 0.55rem;
  text-align: left;
  vertical-align: top;
}

th { background: var(--code-bg); }

td.num, th.num { text-align: right; white-space: nowrap; }

ul, ol { padding-left: 1.4rem; }
li { margin: 0.2rem 0; }

.toc { columns: 2 16rem; font-size: 0.95rem; }
.toc li { break-inside: avoid; }