:root{--bg:#f9fafb;--text:#0f172a;--muted:#475569;--brand:#2563eb;--card:#fff;--line:#e2e8f0}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans",sans-serif;color:var(--text);background:var(--bg);line-height:1.6}
.container{width:min(1100px,92%);margin:auto}
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.logo{display:flex;align-items:center;text-decoration:none;color:var(--text)}
.logo-img{height:22px;width:auto;margin-right:.5rem;display:inline-block;vertical-align:middle}
.logo-text{font-weight:700;letter-spacing:.2px}
.top-nav a{margin-left:14px;text-decoration:none;color:var(--muted)}
.top-nav a:hover{color:var(--brand)}
.last-updated{font-size:.9rem;color:var(--muted);margin:18px 0}
h1,h2,h3{line-height:1.25}
h1{font-size:2rem;margin:16px 0}
h2{font-size:1.35rem;margin:20px 0 10px}
h3{font-size:1.1rem;margin:16px 0 8px}
p{margin:10px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin:16px 0;box-shadow:0 1px 0 rgba(15,23,42,.02)}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.hero{padding:28px 0}
.hero p{color:var(--muted)}
.cta{display:inline-block;margin-top:10px;padding:10px 14px;border:1px solid var(--brand);border-radius:10px;color:var(--brand);text-decoration:none}
.cta:hover{background:var(--brand);color:#fff}
.notice{background:#eef2ff;border-left:4px solid var(--brand);padding:12px;border-radius:8px}
ul{padding-left:20px}
ol{padding-left:20px}
blockquote{border-left:4px solid var(--line);padding-left:12px;color:var(--muted)}
.kicker{color:var(--muted);font-style:italic}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border:1px solid var(--line);padding:8px;text-align:left}
.table th{background:#f3f4f6}
.site-footer{margin-top:40px;background:var(--card);border-top:1px solid var(--line);padding:18px 0;color:var(--muted)}
.footer-nav a{color:var(--muted);text-decoration:none}
.footer-nav a:hover{color:var(--brand)}
figure{margin:0 0 12px 0}
figcaption{font-size:.9rem;color:var(--muted)}

.glossary-index{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 20px}
.glossary-index a{display:inline-block;padding:4px 8px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--muted)}
.glossary-index a:hover{color:var(--brand);border-color:var(--brand)}
.glossary-letter{margin:28px 0 8px;font-size:1.4rem}
.glossary-item{padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--card);margin:10px 0}
.glossary-item strong{display:block;font-size:1.05rem;margin-bottom:6px}
.glossary-meta{font-size:.95rem;color:var(--muted)}
.glossary-item p{margin:6px 0}

.glossary-related{font-size:.95rem;margin-top:6px}
.glossary-related a{color:var(--brand);text-decoration:none}
.glossary-related a:hover{text-decoration:underline}
.top-link-wrap{display:flex;justify-content:flex-end;margin:10px 0 24px}
.top-link-button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--muted)}
.top-link-button:hover{border-color:var(--brand);color:var(--brand)}
.top-link-button span{font-size:18px;line-height:1}