:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --fg: #1a1a1a;
  --muted: #555555;
  --border: #cccccc;
  --accent: #0b5fff;
  --accent-fg: #ffffff;
  --ok-bg: #e6f4ea;
  --ok-fg: #14532d;
  --update-bg: #fff4e5;
  --update-fg: #7a4a00;
  --error-bg: #fdecea;
  --error-fg: #7a1a1a;
  --code-bg: #f0f1f3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --bg-alt: #1b1b1b;
    --fg: #f0f0f0;
    --muted: #b8b8b8;
    --border: #444444;
    --accent: #6ea8ff;
    --accent-fg: #0a1626;
    --ok-bg: #12341f;
    --ok-fg: #a6e6b8;
    --update-bg: #3a2a00;
    --update-fg: #ffcf80;
    --error-bg: #3a1414;
    --error-fg: #ffb3ab;
    --code-bg: #1e1e1e;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.1rem;
  line-height: 1.55;
}

a { color: var(--accent); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  border-radius: 0 0 0.375rem 0;
  font-weight: bold;
}
.skip-link:focus {
  left: 0;
}

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}
.site-header-inner {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1rem 1rem 0.75rem;
}
.site-title {
  font-size: 1.4rem;
  font-weight: bold;
  text-decoration: none;
  color: var(--fg);
}
.site-tagline {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0.15rem 0 0.9rem;
}
nav.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  margin: 0;
  padding: 0;
}
nav.site-nav a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border-radius: 0.375rem;
  text-decoration: none;
  color: var(--fg);
  font-size: 1rem;
}
nav.site-nav a:hover {
  background: var(--border);
}
nav.site-nav a[aria-current="page"] {
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: bold;
}

/* Main content */
main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}
main > h1:first-child { margin-top: 0; }

h1 { font-size: 1.9rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.4rem; margin: 2.25rem 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }
p { margin: 0.75rem 0; }
ul, ol { padding-left: 1.4rem; }
li { margin: 0.35rem 0; }

.lede {
  color: var(--muted);
  font-size: 1.2rem;
  margin-top: 0;
}

/* Cards */
.card {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
}
.card.ok { background: var(--ok-bg); color: var(--ok-fg); border-color: transparent; }
.card.update { background: var(--update-bg); color: var(--update-fg); border-color: transparent; }
.card.error { background: var(--error-bg); color: var(--error-fg); border-color: transparent; }
.status { font-weight: bold; font-size: 1.2rem; margin: 0 0 0.5rem; }
.status.loading { color: var(--muted); }

dl.kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 1rem;
  margin: 1rem 0 0;
}
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; font-weight: bold; }

/* Buttons / links */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--accent-fg);
  text-decoration: none;
  border-radius: 0.375rem;
  font-weight: bold;
  font-size: 1.1rem;
}
.btn-secondary {
  display: inline-block;
  margin-top: 0.25rem;
  color: var(--accent);
  text-decoration: underline;
}
.note {
  color: var(--muted);
  font-size: 1rem;
}

/* Feature grid on home page */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.feature-grid .card { margin: 0; }
.feature-grid h3 { margin-top: 0; }

/* Command / key reference tables */
table.keys {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.5rem;
}
table.keys caption {
  text-align: left;
  font-weight: bold;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}
table.keys th, table.keys td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.keys th { color: var(--muted); font-weight: bold; }
table.keys td:first-child { white-space: nowrap; }
kbd {
  display: inline-block;
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  padding: 0.1rem 0.5rem;
  white-space: nowrap;
}
code {
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 0.95em;
  background: var(--code-bg);
  border-radius: 0.25rem;
  padding: 0.08rem 0.35rem;
}

/* Table wrapper so wide content scrolls instead of the page */
.table-wrap { overflow-x: auto; }

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--muted);
  font-size: 0.95rem;
}
.site-footer-inner {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}
.site-footer-inner p { margin: 0.35rem 0; }

@media (max-width: 30rem) {
  h1 { font-size: 1.5rem; }
  body { font-size: 1.05rem; }
}