/* Squirrel Watch v0.1 — shared stylesheet. Every page links this file; no page carries its own colours or layout.
   Palette (from Robert's Shimmer Audio site): black ground, mint #04d9b2 and teal #04bbb8 for headings and accents,
   deep blue #034c8c for buttons, soft white for reading text. The black look is the default; add data-theme="light"
   on <html> for the white variant (white ground, deep blue headings, near-black text). */
:root {
  --bg: #000000;
  --bg-soft: #0e0e0e;
  --fg: #e7e7e7;
  --muted: #a9b4b2;
  --head: #04d9b2;
  --accent: #04d9b2;
  --accent-2: #04bbb8;
  --blue: #034c8c;
  --blue-ink: #ffffff;
  --card: #0e0e0e;
  --line: #272727;
  --code-bg: #161616;
  --radius: 6px;
  --gutter: 16px;
  --measure: 46rem;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #ffffff;
  --bg-soft: #f6f6f6;
  --fg: #0e0e0e;
  --muted: #4a5464;
  --head: #034c8c;
  --accent: #034c8c;
  --accent-2: #04bbb8;
  --blue: #034c8c;
  --blue-ink: #ffffff;
  --card: #ffffff;
  --line: #e4e4e4;
  --code-bg: #f0f0f0;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: 300;
  overflow-wrap: anywhere;
}
strong, th, .brand, .btn, .eyebrow { font-weight: 500; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-2); text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--card); padding: 8px 12px; }
.skip:focus { left: var(--gutter); z-index: 10; }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px;
  padding-top: 16px; padding-bottom: 16px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px; color: var(--head); text-decoration: none;
  text-transform: uppercase; letter-spacing: 0.18em; font-size: 0.95rem;
}
.brand svg { width: 32px; height: 32px; flex: none; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-left: auto; font-size: 0.9rem; letter-spacing: 0.04em; }
.nav a { color: var(--muted); text-decoration: none; padding: 4px 0; border-bottom: 1px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--head); border-bottom-color: var(--accent); }

/* Main */
main { padding: 40px 0 60px; }
h1, h2, h3 { color: var(--head); line-height: 1.2; font-weight: 300; letter-spacing: 0.04em; margin: 0 0 0.5em; }
h1 { font-size: clamp(1.9rem, 2.2vw + 1.2rem, 2.8rem); letter-spacing: 0.02em; }
h2 { font-size: clamp(1.35rem, 1vw + 1.05rem, 1.7rem); margin-top: 1.9em; }
h3 { font-size: 1.1rem; margin-top: 1.4em; }
p, ul, ol { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; }
li + li { margin-top: 0.3em; }
li::marker { color: var(--accent-2); }
.lead { font-size: 1.15rem; color: var(--fg); max-width: 38rem; }
.muted { color: var(--muted); }
.small { font-size: 0.9rem; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }

.hero { padding: 16px 0 8px; }
.hero .mark { width: 72px; height: 72px; margin-bottom: 14px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.22em; font-size: 0.78rem; color: var(--accent-2); margin-bottom: 10px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; margin: 18px 0;
}
.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); margin: 20px 0; }
.cards .card { margin: 0; }
.card h3 { margin-top: 0; }

.note { background: var(--bg-soft); border-left: 3px solid var(--accent-2); border-radius: 0 var(--radius) var(--radius) 0; padding: 12px 16px; margin: 18px 0; }

.btn {
  display: inline-block; background: var(--blue); color: var(--blue-ink); text-decoration: none;
  letter-spacing: 0.06em; padding: 10px 20px; border-radius: 999px; margin: 6px 10px 6px 0;
  border: 1px solid var(--blue);
}
.btn:hover { color: var(--blue-ink); background: #0a5ea8; border-color: #0a5ea8; }
.btn.secondary { background: transparent; color: var(--head); border: 1px solid var(--accent); }
.btn.secondary:hover { background: var(--bg-soft); color: var(--head); }

dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 0 0 1em; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; }
@media (max-width: 480px) { dl.facts { grid-template-columns: 1fr; gap: 0 } dl.facts dd { margin-bottom: 8px; } }

table { border-collapse: collapse; width: 100%; margin: 0 0 1.2em; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--head); letter-spacing: 0.04em; }
.table-scroll { overflow-x: auto; }

code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
code { background: var(--code-bg); padding: 2px 6px; border-radius: 4px; }
pre { background: var(--code-bg); padding: 14px 16px; border-radius: var(--radius); overflow-x: auto; line-height: 1.5; border: 1px solid var(--line); }
pre code { background: none; padding: 0; }

.toc { font-size: 0.95rem; }
.toc ol { columns: 2; column-gap: 24px; }
@media (max-width: 560px) { .toc ol { columns: 1; } }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 22px 0 32px; color: var(--muted); font-size: 0.9rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--head); }
.site-footer .copy { margin-left: auto; }

@media print {
  .site-header, .site-footer, .skip { display: none; }
  body { font-size: 11pt; color: #000; background: #fff; }
}

.note h2, .note h3 { margin-top: 0; }