/* ガイド記事共通スタイル — lp/index.html のデザイントークン準拠 */
:root {
  --ink: #0E1116;
  --surface: #161B22;
  --line: #2A3340;
  --text: #E6EAF0;
  --text-2: #C2CBD6;
  --text-3: #9BA6B4;
  --teal: #2DD4BF;
  --azure: #3B82F6;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--ink);
  color: var(--text);
  font-family: "IBM Plex Sans JP", "Noto Sans JP", sans-serif;
  line-height: 1.9;
  font-size: 16px;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.site-header {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
  position: sticky; top: 0;
  background: rgba(14,17,22,.92);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); font-weight: 700; }
.brand-mark { width: 10px; height: 10px; border-radius: 2px; background: linear-gradient(135deg, var(--teal), var(--azure)); }
.header-nav a { color: var(--text-3); text-decoration: none; font-size: 14px; margin-left: 18px; }
.header-nav a:hover, .header-nav a:focus-visible { color: var(--teal); }
.breadcrumb { font-size: 12.5px; color: var(--text-3); margin: 28px 0 0; }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--teal); }
article { padding: 16px 0 56px; }
article h1 { font-size: clamp(26px, 5vw, 34px); line-height: 1.4; margin: 18px 0 8px; letter-spacing: .01em; }
.article-meta { color: var(--text-3); font-size: 13px; margin-bottom: 30px; font-family: "IBM Plex Mono", monospace; }
article h2 {
  font-size: 21px; margin: 44px 0 14px; padding-left: 12px;
  border-left: 3px solid var(--teal); line-height: 1.5;
}
article h3 { font-size: 17px; margin: 28px 0 10px; color: var(--text); }
article p { margin: 14px 0; color: var(--text-2); }
article ul, article ol { margin: 14px 0 14px 24px; color: var(--text-2); }
article li { margin: 6px 0; }
article strong { color: var(--text); }
article code {
  font-family: "IBM Plex Mono", monospace; font-size: .92em;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 4px; padding: 1px 6px; color: var(--teal);
}
.formula {
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
  padding: 16px 20px; margin: 18px 0; font-family: "IBM Plex Mono", monospace;
  font-size: 14.5px; color: var(--text); overflow-x: auto;
}
.note {
  background: var(--surface); border-left: 3px solid var(--azure); border-radius: 0 8px 8px 0;
  padding: 14px 18px; margin: 20px 0; font-size: 14.5px; color: var(--text-2);
}
table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
th, td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; color: var(--text-2); }
th { background: var(--surface); color: var(--text); font-weight: 600; }
.guide-nav {
  border-top: 1px solid var(--line); margin-top: 40px; padding-top: 24px;
  display: flex; flex-direction: column; gap: 8px; font-size: 14.5px;
}
.guide-nav a { color: var(--teal); text-decoration: none; }
.guide-nav a:hover { text-decoration: underline; }
.cta-band {
  background: linear-gradient(135deg, rgba(45,212,191,.12), rgba(59,130,246,.12));
  border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 24px; margin: 36px 0 0; text-align: center;
}
.cta-band p { color: var(--text-2); font-size: 14.5px; margin-bottom: 12px; }
.btn-cta {
  display: inline-block; background: linear-gradient(135deg, var(--teal), var(--azure));
  color: #06121a; font-weight: 700; text-decoration: none;
  padding: 10px 26px; border-radius: 8px; font-size: 15px;
}
.site-footer { border-top: 1px solid var(--line); padding: 28px 0 40px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; margin-bottom: 14px; }
.footer-links a { color: var(--text-3); text-decoration: none; }
.footer-links a:hover { color: var(--teal); }
.footer-disclaimers { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--text-3); }