:root { --bg: #ffffff; --fg: #111111; --muted: #5c5c5c; --rule: #e4e4e4; --panel: #f6f6f6; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d0d0d; --fg: #f2f2f2; --muted: #a0a0a0; --rule: #262626; --panel: #171717; }
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 3rem 1rem 5rem;
  background: var(--bg); color: var(--fg);
  font: 16px/1.65 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main { max-width: 42rem; margin: 0 auto; }
h1 { font-size: 1.9rem; letter-spacing: -0.02em; margin: 0 0 0.35rem; }
h2 { font-size: 1.15rem; margin: 2.5rem 0 0.6rem; letter-spacing: -0.01em; }
h3 { font-size: 1rem; margin: 1.5rem 0 0.4rem; }
.updated { color: var(--muted); font-size: 0.9rem; margin: 0 0 2rem; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 3.5rem 0; }
ul, ol { padding-left: 1.2rem; }
li { margin: 0.3rem 0; }
a { color: inherit; text-underline-offset: 3px; }
table { border-collapse: collapse; width: 100%; margin: 0.8rem 0; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.5rem 0.7rem 0.5rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-weight: 600; }
.wrap { overflow-x: auto; }
.panel { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 0.4rem 1.1rem; margin: 1rem 0; }
footer { color: var(--muted); font-size: 0.875rem; margin-top: 3rem; }
label { display: block; font-weight: 600; margin: 1rem 0 0.3rem; }
input { width: 100%; font: inherit; padding: 0.65rem 0.75rem; border: 1px solid var(--rule); border-radius: 8px; background: var(--bg); color: var(--fg); }
button { margin-top: 1.2rem; font: inherit; font-weight: 600; padding: 0.7rem 1.2rem; border: 0; border-radius: 8px; background: var(--fg); color: var(--bg); cursor: pointer; }
button[disabled] { opacity: 0.5; cursor: default; }
.msg { margin-top: 1rem; }
.home ul { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--rule); }
.home li { border-bottom: 1px solid var(--rule); margin: 0; }
.home li a { display: block; padding: 1rem 0.25rem; text-decoration: none; }
.home li a:hover { opacity: 0.6; }
.sub { display: block; color: var(--muted); font-size: 0.875rem; margin-top: 0.15rem; }