:root {
  --bg: #ffffff;
  --fg: #1b1f23;
  --muted: #4a5159;
  --line: #d4d9de;
  --soft: #f3f5f7;
  --link: #0b57a4;
  --accent: #0d5f55;
  --accent-fg: #ffffff;
  --note-bg: #fff6e0;
  --note-line: #b36b00;
  --error: #b00020;
  --focus: #b35c00;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --fg: #e8eaed;
    --muted: #b4bac1;
    --line: #3a4148;
    --soft: #1d2226;
    --link: #8ab8f0;
    --accent: #5fc2b3;
    --accent-fg: #0b1513;
    --note-bg: #2a2416;
    --note-line: #e0a84a;
    --error: #ff8a95;
    --focus: #ffb366;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
a { color: var(--link); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
main:focus { outline: none; }
.skip { position: absolute; left: -9999px; top: 0.5rem; z-index: 10; background: var(--bg); color: var(--link); padding: 0.5rem 0.75rem; border: 2px solid var(--link); }
.skip:focus { left: 0.5rem; }

header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1.25rem; padding-top: 0.75rem; padding-bottom: 0.75rem; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
.brand span { font-weight: 400; color: var(--muted); }
nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin: 0; padding: 0; }
nav a { display: inline-block; padding: 0.25rem 0; }

main { padding: 1.5rem 0 3rem; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.4rem; line-height: 1.3; margin: 2.5rem 0 0.75rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
h3 { font-size: 1.15rem; margin: 1.75rem 0 0.5rem; }
p, ul, ol { margin: 0 0 1rem; }
li { margin-bottom: 0.35rem; }
.lead { font-size: 1.15rem; }
.muted, .small { color: var(--muted); }
.small { font-size: 0.95rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.25rem 0; }
.button, button {
  display: inline-block; font: inherit; font-weight: 600; line-height: 1.2;
  padding: 0.75rem 1.1rem; border-radius: 6px; border: 2px solid var(--accent);
  background: var(--accent); color: var(--accent-fg); text-decoration: none; cursor: pointer;
}
.button.secondary { background: transparent; color: var(--accent); }
.button:hover, button:hover { text-decoration: underline; }

.note { background: var(--note-bg); border-left: 4px solid var(--note-line); padding: 0.75rem 1rem; margin: 1.25rem 0; }
.note p:last-child { margin-bottom: 0; }

blockquote { margin: 0 0 1rem; padding: 0.75rem 1rem; border-left: 4px solid var(--line); background: var(--soft); }
blockquote p { margin: 0 0 0.5rem; }
figure.quote { margin: 0 0 1.25rem; }
figure.quote figcaption { font-size: 0.95rem; color: var(--muted); }

table { width: 100%; border-collapse: collapse; margin: 0 0 1rem; font-size: 0.98rem; }
caption { text-align: left; font-weight: 600; padding-bottom: 0.4rem; }
th, td { text-align: left; vertical-align: top; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--line); }
thead th { border-bottom: 2px solid var(--fg); }
.table-scroll { overflow-x: auto; }

pre { background: var(--soft); border: 1px solid var(--line); padding: 0.75rem; overflow-x: auto; font-size: 0.9rem; line-height: 1.45; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }

form .field { margin: 0 0 1.25rem; }
label, legend { display: block; font-weight: 600; margin-bottom: 0.3rem; }
fieldset { border: 0; padding: 0; margin: 0 0 1.25rem; }
fieldset label { font-weight: 400; display: flex; gap: 0.5rem; align-items: flex-start; margin-bottom: 0.4rem; }
.hint { display: block; color: var(--muted); font-size: 0.95rem; margin: -0.1rem 0 0.4rem; }
input[type=email], input[type=text], input[type=number], input[type=date], select, textarea {
  font: inherit; color: var(--fg); background: var(--bg);
  width: 100%; max-width: 30rem; padding: 0.55rem 0.6rem; border: 2px solid var(--muted); border-radius: 4px;
}
textarea { min-height: 6rem; }
input[type=checkbox], input[type=radio] { width: 1.15rem; height: 1.15rem; margin-top: 0.25rem; flex: none; accent-color: var(--accent); }
[aria-invalid=true] { border-color: var(--error); }
.error-text { color: var(--error); font-weight: 600; display: block; margin-bottom: 0.3rem; }
.error-summary { border: 3px solid var(--error); padding: 0.75rem 1rem; margin: 0 0 1.5rem; }
.error-summary h2 { border: 0; margin: 0 0 0.5rem; padding: 0; font-size: 1.2rem; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

footer.site { border-top: 1px solid var(--line); padding: 1.25rem 0 2rem; font-size: 0.95rem; color: var(--muted); }
footer.site p { margin: 0 0 0.5rem; }

@media (max-width: 30rem) {
  h1 { font-size: 1.6rem; }
  th, td { padding: 0.45rem 0.4rem; }
}