*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  overflow-x: clip;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: #24292e;
  background: #f6f8fa;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
}

/* ── Header ────────────────────────────────────────────────── */
header {
  background: #0969da;
  padding: 12px 28px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,.25);
  width: 100%;
  box-sizing: border-box;
}
header a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 1em;
  letter-spacing: .01em;
}
header a:hover { text-decoration: underline; }
.header-logo {
  height: 28px;
  width: auto;
  vertical-align: middle;
  margin-right: 10px;
  border-radius: 4px;
}

/* ── Footer ────────────────────────────────────────────────── */
footer {
  background: #0969da;
  padding: 16px 28px;
  color: #fff;
  text-align: center;
  margin-top: 40px;
  width: 100%;
  box-sizing: border-box;
}
footer a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}
footer a:hover { text-decoration: underline; }

main ~ footer {
  margin-top: auto;
}
main ~ .page-nav ~ footer {
  margin-top: 40px;
}

/* ── Page nav ───────────────────────────────────────────────── */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  border-bottom: 1px solid #d0d7de;
  padding: 9px 28px;
  font-size: .88em;
  gap: 16px;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  flex-wrap: wrap;
}
.page-nav a {
  color: #0969da;
  text-decoration: none;
  white-space: normal;
}
.page-nav a:hover { text-decoration: underline; }
.page-nav .nav-center { color: #57606a; }
.page-nav span { min-width: 1px; }
main + .page-nav { border-bottom: none; border-top: 1px solid #d0d7de; margin-top: auto; }

/* ── Main content ───────────────────────────────────────────── */
main {
  max-width: 1200px;
  width: 100%;
  min-width: 0;
  margin: 28px auto;
  background: #fff;
  border: 1px solid #d0d7de;
  border-radius: 6px;
  padding: 36px 44px;
  overflow-x: auto;
}

/* ── Screenshots ────────────────────────────────────────────── */
main img {
  display: block;
  max-width: 100%;
  margin: 20px auto;
  -webkit-mask-image:
    linear-gradient(to right,  transparent 0%, black 2%, black 98%, transparent 100%),
    linear-gradient(to bottom, transparent 0%, black 2%, black 98%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(to right,  transparent 0%, black 2%, black 98%, transparent 100%),
    linear-gradient(to bottom, transparent 0%, black 2%, black 98%, transparent 100%);
  mask-composite: intersect;
}

/* ── Typography ─────────────────────────────────────────────── */
h1 {
  font-size: 1.75em;
  border-bottom: 2px solid #0969da;
  padding-bottom: 10px;
  margin-bottom: 20px;
}
h2 {
  font-size: 1.3em;
  border-bottom: 1px solid #d0d7de;
  padding-bottom: 6px;
  margin-top: 36px;
  margin-bottom: 14px;
}
h3 {
  font-size: 1.1em;
  margin-top: 24px;
  margin-bottom: 10px;
}
h4 {
  font-size: 1em;
  font-weight: 700;
  margin-top: 18px;
  margin-bottom: 6px;
}
p { margin: 10px 0; }
a { color: #0969da; }
a:hover { text-decoration: underline; }
strong { font-weight: 600; }
em { font-style: italic; }

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .875em;
  background: #f6f8fa;
  border: 1px solid #d0d7de;
  border-radius: 4px;
  padding: 1px 5px;
}

/* ── Lists ──────────────────────────────────────────────────── */
ul, ol {
  padding-left: 26px;
  margin: 8px 0;
}
li { margin: 4px 0; }
li > ul, li > ol { margin: 2px 0; }

/* ── Tables ─────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: .92em;
}
th {
  background: #f6f8fa;
  border: 1px solid #d0d7de;
  padding: 8px 13px;
  text-align: left;
  font-weight: 600;
}
td {
  border: 1px solid #d0d7de;
  padding: 7px 13px;
  vertical-align: top;
}

/* ── Week / status colours ──────────────────────────────────── */
.week-a  { background: #ffff96; }
.week-b  { background: #ffc864; }
.week-x  { background: #add8e6; }
.week-y  { background: #90ee90; }
.week-none { background: #fff; }
.color-valid    { background: #90ee90; }
.color-missing  { background: #ffff96; }
.color-extra    { background: #add8e6; }
.color-conflict { background: #ffa500; }
.color-none     { background: #fff; }

/* ── Example boxes ──────────────────────────────────────────── */
.example {
  border: 1px solid #54aeff;
  border-left: 4px solid #0969da;
  background: #ddf4ff;
  border-radius: 4px;
  padding: 14px 18px;
  margin: 18px 0;
}
.example-title {
  font-weight: 700;
  color: #0550ae;
  margin-bottom: 10px;
}
.example table { font-size: .87em; }

/* ── Note / warning / important boxes ──────────────────────── */
.note {
  background: #fff8c5;
  border-left: 4px solid #d4a72c;
  padding: 8px 14px;
  margin: 12px 0;
  border-radius: 0 4px 4px 0;
}
.important {
  background: #fff0f0;
  border-left: 4px solid #cf222e;
  padding: 8px 14px;
  margin: 12px 0;
  border-radius: 0 4px 4px 0;
}
.note strong, .important strong { font-weight: 700; }

hr { border: none; border-top: 1px solid #d0d7de; margin: 24px 0; }

/* ── Anchor offset (compensate for sticky header) ──────────── */
#content h1, #content h2, #content h3,
#content h4, #content h5, #content h6 {
  scroll-margin-top: 65px;
}

/* ── Mobile / responsive ────────────────────────────────────── */
@media (max-width: 600px) {
  header, footer {
    width: 100%;
    padding-left: 14px;
    padding-right: 14px;
    box-sizing: border-box;
  }
  main {
    margin: 12px 8px;
    padding: 20px 16px;
    width: calc(100% - 16px);
  }
  .page-nav {
    padding-left: 14px;
    padding-right: 14px;
  }
}

/* ── Rendered markdown (via viewer.js) ──────────────────────── */
#content blockquote {
  border: 1px solid #54aeff;
  border-left: 4px solid #0969da;
  background: #ddf4ff;
  border-radius: 0 4px 4px 0;
  padding: 12px 18px;
  margin: 16px 0;
}
#content blockquote p { margin: 6px 0; }
#content blockquote > p:first-child > strong { color: #0550ae; }
#content blockquote table { font-size: .87em; }