:root {
  --bg: #fbfaf7; --ink: #1d1d1b; --muted: #5b5a55; --card: #ffffff; --line: #e3e0d8;
  --accent: #1f5f4a; --accent-ink: #ffffff; --focus: #0b57d0; --warn-bg: #fff4d6; --warn-ink: #5c4400;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14150f; --ink: #ecebe5; --muted: #b0aea4; --card: #1d1f17; --line: #34362b;
    --accent: #7fd1ae; --accent-ink: #0d1a14; --focus: #8ab4f8; --warn-bg: #3a3012; --warn-ink: #f3dfa0;
  }
}
:root[data-theme="dark"] {
  --bg: #14150f; --ink: #ecebe5; --muted: #b0aea4; --card: #1d1f17; --line: #34362b;
  --accent: #7fd1ae; --accent-ink: #0d1a14; --focus: #8ab4f8; --warn-bg: #3a3012; --warn-ink: #f3dfa0;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: 42rem; margin: 0 auto; padding: 0 16px; }
header.site { padding: 18px 0 6px; display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.brand { font-weight: 800; font-size: 1.25rem; letter-spacing: .01em; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
nav a { color: var(--muted); margin-left: 16px; font-size: .95rem; }
h1 { font-size: clamp(1.9rem, 6vw, 2.6rem); line-height: 1.15; margin: 28px 0 12px; text-wrap: balance; }
h2 { font-size: 1.4rem; line-height: 1.25; margin: 40px 0 10px; text-wrap: balance; }
h3 { font-size: 1.1rem; margin: 24px 0 6px; }
p, li { max-width: 65ch; }
.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 20px; }
a { color: var(--accent); text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px;
}
.btn, button {
  display: inline-block; min-height: 48px; padding: 12px 22px; font: inherit; font-weight: 700;
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px; cursor: pointer; text-decoration: none;
}
.btn:hover, button:hover { filter: brightness(1.08); }
.grid { display: grid; gap: 14px; grid-template-columns: 1fr; margin: 16px 0; }
@media (min-width: 40rem) { .grid { grid-template-columns: 1fr 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); }
ol.steps { padding-left: 1.2rem; }
ol.steps li { margin: 6px 0; }
form.signup { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 16px; margin: 16px 0; }
label { display: block; font-weight: 600; margin: 14px 0 4px; }
.hint { font-weight: 400; color: var(--muted); font-size: .92rem; }
input[type=email], input[type=text], select {
  width: 100%; min-height: 48px; padding: 10px 12px; font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--muted); border-radius: 8px;
}
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; margin: 16px 0; }
.check input { width: 24px; height: 24px; margin-top: 2px; flex: none; }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
#form-note { margin-top: 12px; padding: 10px 12px; border-radius: 8px; background: var(--warn-bg); color: var(--warn-ink); }
#form-note[hidden] { display: none; }
.fine { color: var(--muted); font-size: .92rem; }
footer { margin: 48px 0 32px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .92rem; }
footer a { color: var(--muted); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 6px 8px; text-align: left; vertical-align: top; }
th { background: var(--card); }
blockquote { margin: 16px 0; padding: 8px 14px; border-left: 4px solid var(--line); color: var(--muted); }
code { font-size: .92em; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; }
.skip:focus { left: 8px; top: 8px; z-index: 5; }