:root {
  --primary: #e11d48;
  --secondary: #9f1239;
  --accent: #059669;
  --bg: #ffffff;
  --surface: #fff1f2;
  --surface-alt: #ffe4e6;
  --text: #881337;
  --muted: #5e6d7c;
  --border: #fecdd3;
  --row-alt: #fff1f2;
  --radius: 6px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--secondary); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--primary); }
header.site-header {
  background: var(--surface);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
.brandbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); }
.brand img { width: 40px; height: 40px; display: block; }
.brand-name { font-weight: 800; font-size: 20px; letter-spacing: -0.5px; }
nav.primary ul { list-style: none; padding: 0; margin: 0; display: flex; gap: 18px; flex-wrap: wrap; }
nav.primary a { text-decoration: none; color: var(--text); font-weight: 600; font-size: 15px; padding: 4px 0; border-bottom: 2px solid transparent; }
nav.primary a:hover { border-bottom-color: var(--primary); color: var(--primary); }
.hero {
  background: linear-gradient(135deg, #e11d48 0%, #9f1239 50%, #059669 100%);
  color: #fff;
  padding: 56px 0 48px;
  border-bottom: 4px solid var(--secondary);
}
.hero h1 { margin: 0 0 12px; font-size: clamp(28px, 4.2vw, 42px); line-height: 1.15; letter-spacing: -0.5px; }
.hero .byline { font-size: 14px; opacity: 0.92; margin: 0 0 20px; }
.hero .lede p { font-size: 18px; margin: 6px 0; max-width: 720px; }
.hero .cta-row { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: var(--radius); font-weight: 700; text-decoration: none;
  background: #fff; color: var(--primary); border: 2px solid #fff;
}
.btn.ghost { background: transparent; color: #fff; border-color: #fff; }
.btn:hover { background: var(--surface); color: var(--secondary); }
main { padding: 40px 0 60px; }
main h2 {
  margin-top: 42px;
  margin-bottom: 14px;
  padding: 10px 16px;
  border-left: 5px solid var(--primary);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 26px;
  color: var(--secondary);
  scroll-margin-top: 90px;
}
main h3 { color: var(--secondary); margin-top: 26px; font-size: 19px; }
main p { margin: 12px 0; }
nav.toc {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 24px 0 12px;
}
nav.toc h2 { margin: 0 0 10px; padding: 0; background: transparent; border-left: none; font-size: 18px; }
nav.toc ol { columns: 2; column-gap: 28px; padding-left: 20px; margin: 0; }
nav.toc a { text-decoration: none; color: var(--secondary); }
nav.toc a:hover { text-decoration: underline; }
main ul {
  list-style: none; padding-left: 0; margin: 14px 0;
}
main ul li {
  position: relative; padding: 6px 0 6px 26px;
}
main ul li::before {
  content: "▶";
  color: var(--accent);
  position: absolute; left: 0; top: 8px; font-size: 12px;
}
main ol {
  list-style: none;
  counter-reset: item;
  padding-left: 0;
  margin: 14px 0;
}
main ol li {
  counter-increment: item;
  position: relative;
  padding: 8px 0 8px 44px;
  min-height: 28px;
}
main ol li::before {
  content: counter(item);
  position: absolute; left: 0; top: 4px;
  width: 30px; height: 30px; line-height: 30px; text-align: center;
  background: var(--primary); color: #fff;
  border-radius: 50%; font-weight: 700; font-size: 14px;
}
.table-wrap { overflow-x: auto; margin: 18px 0; border-radius: var(--radius); border: 1px solid var(--border); }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--bg); }
thead th {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; text-align: left; padding: 12px 14px; font-weight: 700;
}
tbody td { padding: 11px 14px; border-top: 1px solid var(--border); vertical-align: top; }
tbody tr:nth-child(even) td { background: var(--row-alt); }
details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 10px 0;
  background: var(--bg);
}
details summary {
  cursor: pointer; font-weight: 700; color: var(--secondary);
  list-style: none; position: relative; padding-right: 30px;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "▼"; position: absolute; right: 4px; top: 2px;
  transition: transform 0.2s ease; color: var(--primary);
}
details[open] summary::after { transform: rotate(180deg); }
details p { margin: 10px 0 4px; }
.callout {
  border: 1px solid var(--border);
  background: var(--surface);
  border-left: 5px solid var(--accent);
  padding: 14px 18px;
  border-radius: var(--radius);
  margin: 20px 0;
}
figure.svg-figure { margin: 22px 0; text-align: center; }
figure.svg-figure svg { max-width: 100%; height: auto; }
figure.svg-figure figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; }
.author-box {
  background: linear-gradient(135deg, var(--surface), var(--surface-alt));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 42px 0 20px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.author-box img { width: 84px; height: 84px; border-radius: 50%; background: #fff; padding: 4px; border: 1px solid var(--border); }
.author-box h3 { margin: 0 0 4px; color: var(--secondary); }
.author-box p { margin: 4px 0; font-size: 15px; }
.byline { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
main .byline strong { color: var(--text); }
footer.site-footer {
  background: var(--surface);
  border-top: 2px solid var(--border);
  padding: 30px 0 18px;
  margin-top: 40px;
  font-size: 14px;
  color: var(--muted);
}
footer.site-footer nav ul { list-style: none; padding: 0; margin: 0 0 12px; display: flex; gap: 18px; flex-wrap: wrap; }
footer.site-footer nav a { color: var(--secondary); text-decoration: none; }
footer.site-footer nav a:hover { text-decoration: underline; }
footer.site-footer .fine { font-size: 12px; opacity: 0.85; }
@media (max-width: 700px) {
  .hero { padding: 40px 0 34px; }
  main h2 { font-size: 22px; }
  nav.toc ol { columns: 1; }
  .author-box { flex-direction: column; align-items: flex-start; }
}

/* a11y additions */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;border-radius:4px;z-index:1000;text-decoration:none;font-weight:700}
.skip-link:focus{left:12px;top:12px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}}