:root {
  --bg: #eef3f5;
  --paper: #ffffff;
  --ink: #15212b;
  --muted: #4e5f6d;
  --line: #d2dde5;
  --brand: #0c6c6d;
  --accent: #b35c12;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, #f8fcff 0, #eef3f5 43%),
    linear-gradient(180deg, #eef3f5 0%, #eef3f5 100%);
  line-height: 1.68;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1180px, 94%); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(8px);
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
}
.brand, header strong {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  letter-spacing: .02em;
}
.brand::before, header strong::before {
  content: "";
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: url("/favicon.svg") center / contain no-repeat;
  flex: 0 0 auto;
  box-shadow: 0 4px 10px rgba(12, 108, 109, 0.18);
}
nav { display: flex; gap: 13px; flex-wrap: wrap; font-family: "IBM Plex Sans", "Segoe UI", sans-serif; }
main { padding: 26px 0 66px; }
.hero, .panel, .article, .card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 10px 28px rgba(6, 25, 44, 0.06);
}
.hero { padding: 24px; }
.hero h1 { margin: 0 0 8px; font-size: clamp(1.95rem, 4vw, 3rem); line-height: 1.12; }
.lede { font-size: 1.08rem; max-width: 860px; }
.kicker {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--accent);
  font: 700 0.76rem/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(165px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.stats div {
  background: #f9fcff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
}
.stats strong { display: block; font: 700 1.52rem/1.2 "IBM Plex Sans", "Segoe UI", sans-serif; color: var(--brand); }
.stats span { color: var(--muted); font-family: "IBM Plex Sans", "Segoe UI", sans-serif; font-size: 0.9rem; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin-top: 12px; }
.card { padding: 15px; }
.panel { padding: 18px; margin-top: 14px; }
.article { padding: 20px; }
.article h1 { margin: 6px 0 16px; font-size: clamp(1.75rem, 3.4vw, 2.55rem); }
.article h2 {
  margin-top: 28px;
  border-top: 1px dashed var(--line);
  padding-top: 18px;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}
.breadcrumbs {
  margin: 2px 0 12px;
  color: var(--muted);
  font: 500 0.92rem/1.4 "IBM Plex Sans", "Segoe UI", sans-serif;
}
.search {
  width: 100%;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 11px;
  font: 500 0.98rem/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}
.table-wrap { overflow-x: auto; }
.answer-box {
  border: 1px solid #b8cbd7;
  background: #f7fbfd;
  border-radius: 12px;
  padding: 14px;
  margin: 16px 0;
}
.answer-box h2 {
  margin: 0 0 8px;
  border: 0;
  padding: 0;
}
.answer-box table { margin: 0; }
.answer-box th { width: 32%; }
.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 20px;
}
.resource-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  background: #fff;
  color: var(--ink);
  font: 700 0.86rem/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}
.citation-list {
  padding-left: 24px;
}
.citation-list li {
  margin: 12px 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.citation-meta {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font: 600 0.83rem/1.35 "IBM Plex Sans", "Segoe UI", sans-serif;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  border: 1px solid var(--line);
  background: #fff;
}
th, td {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th { background: #f2f8fb; font-family: "IBM Plex Sans", "Segoe UI", sans-serif; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
details {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fcfeff;
  padding: 9px 11px;
  margin: 10px 0;
}
summary { cursor: pointer; font-family: "IBM Plex Sans", "Segoe UI", sans-serif; font-weight: 700; }
.topic-list { columns: 2; column-gap: 28px; }
.pill-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.pill {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--ink);
  background: #fff;
  font: 600 0.86rem/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}
.site-footer {
  border-top: 1px solid var(--line);
  background: #e7eef2;
  color: var(--muted);
  padding: 22px 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}
@media (max-width: 760px) {
  .topic-list { columns: 1; }
  .site-header .container { flex-direction: column; align-items: flex-start; }
}