:root{--bg:#fff;--panel:#f6f7f9;--text:#111318;--muted:#4b5563;--border:#d7dbe2;--link:#0b5fff;--radius:14px;--max:1040px;--font:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
@media (prefers-color-scheme:dark){:root{--bg:#0b0f17;--panel:#111827;--text:#e7eaf0;--muted:#b0bac7;--border:#243043;--link:#7aa7ff}}
*{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.55}
.container{width:min(100% - 32px,var(--max));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(140%) blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
.brand{font-weight:650;letter-spacing:.2px;text-decoration:none;color:var(--text);white-space:nowrap}
.site-nav{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
.site-nav a{text-decoration:none;color:var(--muted);padding:8px 10px;border-radius:10px;border:1px solid transparent}
.site-nav a:hover{color:var(--text);border-color:var(--border);background:color-mix(in srgb,var(--panel) 70%,transparent)}
.site-nav a[aria-current="page"]{color:var(--text);border-color:var(--border);background:color-mix(in srgb,var(--panel) 90%,transparent)}
main{padding:38px 0}
h1,h2,h3{line-height:1.18;letter-spacing:-.2px;margin:0 0 14px}
h1{font-size:clamp(28px,4vw,44px)}h2{font-size:clamp(18px,2.2vw,24px);margin-top:38px}
p{margin:0 0 14px}.lead{font-size:1.05rem;color:var(--muted);max-width:72ch}
a{color:var(--link);text-underline-offset:2px}
hr{border:0;border-top:1px solid var(--border);margin:38px 0}
ul{margin:0 0 14px;padding-left:1.1rem}li{margin:6px 0}
.grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:18px}
@media(min-width:760px){.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{border:1px solid var(--border);background:color-mix(in srgb,var(--panel) 85%,transparent);border-radius:var(--radius);padding:18px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 10px}
.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:.84rem;border:1px solid var(--border);color:var(--muted);background:color-mix(in srgb,var(--bg) 75%,transparent)}
.kv{margin:0;color:var(--muted)}.kv strong{color:var(--text)}.small{font-size:.95rem;color:var(--muted)}
.footer{border-top:1px solid var(--border);padding:22px 0;color:var(--muted);font-size:.95rem}

/* brand mark */
.brand-mark{display:flex;align-items:center;gap:10px}
.brand-icon{width:22px;height:22px;display:block}