@font-face { font-family: "IBM Plex Sans"; font-weight: 400; src: url("/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; src: url("/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; font-weight: 700; src: url("/fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Serif"; font-weight: 700; src: url("/fonts/ibm-plex-serif-latin-700-normal.woff2") format("woff2"); font-display: swap; }

:root {
  --navy: #2f558c; --navy-deep: #1b3a5c; --ink: #161a22; --ink-2: #3c4654; --ink-3: #5b6470;
  --line: #e6e9ee; --bg: #f7f9fc; --green-bg: #e9f6ee; --green: #1f7a4d;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, sans-serif; line-height: 1.65; font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--navy); }

/* ---- Two-column layout with a sticky left panel (mirrors the app) ---- */
.layout { display: grid; grid-template-columns: 264px 1fr; min-height: 100vh; }
.side {
  background: #fff; border-right: 1px solid var(--line);
  padding: 20px 18px 22px; position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
}
.side-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.side-brand span:last-child { font-weight: 700; letter-spacing: -0.02em; font-size: 16px; }
.mark { width: 30px; height: 30px; border-radius: 8px; background: var(--navy); display: grid; place-items: center; flex: none; }
.back { display: inline-flex; align-items: center; gap: 7px; margin-top: 20px; color: var(--navy); text-decoration: none; font-size: 14px; font-weight: 600; }
.back:hover { text-decoration: underline; }
.side-nav { margin-top: 26px; }
.side-h { text-transform: uppercase; letter-spacing: 0.08em; font-size: 11px; font-weight: 600; color: var(--ink-3); margin-bottom: 6px; }
.side-nav a { display: block; padding: 8px 0; color: var(--ink-2); text-decoration: none; font-size: 14px; border-bottom: 1px solid var(--line); }
.side-nav a:last-child { border-bottom: none; }
.side-nav a:hover { color: var(--navy); }
.side-nav a.active { color: var(--navy); font-weight: 700; }
.side-legal { display: block; margin-top: 16px; font-size: 13px; color: var(--ink-3); text-decoration: none; }
.side-legal:hover { color: var(--navy); }
.side-legal.active { color: var(--navy); font-weight: 700; }
.side-cta { margin-top: auto; background: var(--navy); color: #fff; text-decoration: none; text-align: center; padding: 12px; border-radius: 10px; font-weight: 600; font-size: 14px; }
.side-cta:hover { background: var(--navy-deep); }

main { max-width: 720px; margin: 0 auto; padding: 40px 28px 90px; }
.crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 18px; }
.crumb a { text-decoration: none; }
h1 { font-family: "IBM Plex Serif", Georgia, serif; font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 10px; }
h2 { font-size: 22px; letter-spacing: -0.01em; margin: 34px 0 10px; }
h3 { font-size: 18px; margin: 24px 0 6px; }
.lede { font-size: 19px; color: var(--ink-2); margin: 0 0 8px; }
p, li { color: var(--ink-2); }
ol, ul { padding-left: 22px; }
li { margin: 6px 0; }
code { background: #eef2f7; padding: 1px 6px; border-radius: 5px; font-size: 0.9em; }
.cta {
  display: block; background: linear-gradient(160deg, var(--navy), var(--navy-deep)); color: #fff;
  border-radius: 14px; padding: 22px 24px; text-decoration: none; margin: 30px 0;
}
.cta b { font-size: 19px; display: block; }
.cta span { color: #cdddf2; font-size: 15px; }
.note { background: #fff; border: 1px solid var(--line); border-left: 3px solid var(--navy); border-radius: 8px; padding: 14px 16px; font-size: 15px; color: var(--ink-2); margin: 20px 0; }
.related { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin-top: 34px; }
.related h2 { margin-top: 0; font-size: 16px; }
.related a { display: block; padding: 5px 0; }
footer { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 20px; font-size: 13px; color: var(--ink-3); }

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--line); }
  .side-cta { margin-top: 16px; }
  main { padding: 28px 20px 70px; }
}