/* podsdr.com — colours taken from the PodSDR app icon */
:root {
  --navy: #0b1b38;
  --ink: #14213a;
  --ink-2: #48556b;
  --blue: #1763b8;
  --blue-dark: #1c5390;
  --cyan: #6fe3ff;
  --tint: #e9f2fb;
  --tint-2: #f5f9fd;
  --line: #bcd2ea;
  --line-2: #dbe7f4;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font: 17px/1.6 var(--sans);
}
a { color: var(--blue); }
a:hover { color: var(--blue-dark); }
img { max-width: 100%; height: auto; display: block; }
code, pre, kbd, .mono { font-family: var(--mono); }
code { font-size: 0.88em; background: var(--tint); padding: 0.08em 0.35em; border-radius: 3px; }
pre { background: var(--navy); color: #dfe9f5; padding: 12px 16px; border-radius: 4px; overflow-x: auto; font-size: 14px; line-height: 1.5; margin: 10px 0 18px; }
pre code { background: none; padding: 0; font-size: inherit; color: inherit; }
h1, h2, h3 { font-weight: 600; line-height: 1.2; margin: 0 0 0.4em; color: var(--navy); }
h1 { font-size: 2.3rem; letter-spacing: -0.01em; }
h2 { font-size: 1.55rem; margin-top: 2.6em; padding-top: 0.8em; border-top: 1px solid var(--line-2); }
h3 { font-size: 1.1rem; margin-top: 1.8em; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.4em; margin: 0 0 1em; }
li { margin: 0.25em 0; }
hr { border: 0; border-top: 1px solid var(--line-2); margin: 2em 0; }
.muted { color: var(--ink-2); }
.small { font-size: 0.92rem; }

.wrap { max-width: 900px; margin: 0 auto; padding: 0 22px; }
.wide { max-width: 1120px; }

/* header */
.top { background: var(--tint); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 18px; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); font-weight: 600; font-size: 1.15rem; }
.logo img { width: 28px; height: 28px; border-radius: 6px; }
.top nav { margin-left: auto; display: flex; gap: 4px; }
.top nav a { color: var(--ink); text-decoration: none; padding: 6px 10px; border-radius: 4px; font-size: 0.98rem; }
.top nav a:hover { background: #fff; }
.top nav a[aria-current="page"] { background: #fff; border: 1px solid var(--line); padding: 5px 9px; }
.menu-btn { display: none; margin-left: auto; font: inherit; background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 5px 10px; color: var(--ink); }

/* intro */
.intro { padding: 44px 0 10px; }
.intro h1 { margin-bottom: 0.2em; }
.intro .sub { font-size: 1.25rem; color: var(--ink-2); margin-bottom: 1.2em; line-height: 1.45; }
.intro p { max-width: 42em; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 30px; }
.btn { display: inline-block; text-decoration: none; padding: 9px 16px; border-radius: 4px; border: 1px solid var(--blue); color: var(--blue); font-weight: 500; }
.btn:hover { background: var(--tint); color: var(--blue-dark); }
.btn.primary { background: var(--blue); color: #fff; }
.btn.primary:hover { background: var(--blue-dark); color: #fff; }

/* figures */
figure { margin: 0 0 1.6em; }
figure img { border: 1px solid var(--line); border-radius: 4px; }
figcaption { font-size: 0.9rem; color: var(--ink-2); margin-top: 8px; }
.shot-wide { margin: 10px auto 40px; }
.aside-shot { float: right; width: 230px; margin: 0 0 16px 28px; }
.aside-shot img { border-radius: 10px; }
.clearfix::after { content: ""; display: table; clear: both; }

/* two columns for plain lists */
.cols { columns: 2; column-gap: 40px; }
.cols li { break-inside: avoid; }

/* tables */
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; margin: 0 0 1.4em; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px 8px 0; border-bottom: 1px solid var(--line-2); }
th { font-weight: 600; color: var(--navy); border-bottom: 1px solid var(--line); }
td .sha { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-2); word-break: break-all; display: block; margin-top: 2px; }
td.size { white-space: nowrap; }
.table-scroll { overflow-x: auto; }

/* architecture diagram */
.diagram { border: 1px solid var(--line); border-radius: 4px; padding: 14px; margin: 0 0 1.6em; background: var(--tint-2); overflow-x: auto; }
.diagram svg { display: block; width: 100%; min-width: 720px; height: auto; }

/* definition lists (contact) */
dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 8px 24px; margin: 0 0 1.4em; }
dl.facts dt { color: var(--ink-2); }
dl.facts dd { margin: 0; }
address { font-style: normal; }

.note { background: var(--tint); border-left: 3px solid var(--blue); padding: 10px 14px; border-radius: 0 4px 4px 0; margin: 0 0 1.4em; font-size: 0.95rem; }

/* footer */
footer { margin-top: 70px; background: var(--tint); border-top: 1px solid var(--line); padding: 26px 0 30px; font-size: 0.92rem; color: var(--ink-2); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 30px; justify-content: space-between; }
footer a { color: var(--ink-2); }

@media (max-width: 760px) {
  body { font-size: 16px; }
  h1 { font-size: 1.9rem; }
  .top nav { display: none; position: absolute; left: 0; right: 0; top: 60px; flex-direction: column; background: var(--tint); border-bottom: 1px solid var(--line); padding: 8px 16px 14px; z-index: 10; }
  .top nav.open { display: flex; }
  .top { position: relative; }
  .menu-btn { display: block; }
  .cols { columns: 1; }
  .aside-shot { float: none; width: 200px; margin: 0 0 20px; }
  dl.facts { grid-template-columns: 1fr; gap: 2px 0; }
  dl.facts dd { margin-bottom: 10px; }
}