:root{
  --bg:#0b0f1a; --bg2:#0f1524; --card:#141b2e; --card2:#1a2338;
  --line:#243049; --tx:#eef2fb; --mut:#9aa7c2; --acc:#4f7cff; --acc2:#7aa2ff;
  --ok:#37d39b; --warn:#ffb020; --rad:16px; --max:1120px;
  --shadow:0 18px 50px -20px rgba(0,0,0,.7);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(1200px 600px at 80% -10%,rgba(79,124,255,.15),transparent 60%),var(--bg);color:var(--tx);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:.5em;background:linear-gradient(180deg,var(--acc2),var(--acc));color:#fff;font-weight:700;padding:15px 26px;border-radius:999px;border:0;cursor:pointer;box-shadow:0 10px 30px -8px rgba(79,124,255,.7);transition:transform .15s ease,box-shadow .15s ease;font-size:16px}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 40px -8px rgba(79,124,255,.85)}
.btn.big{padding:18px 34px;font-size:18px}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--tx);box-shadow:none;font-weight:600}
.muted{color:var(--mut)}
.pill{display:inline-flex;align-items:center;gap:.45em;background:var(--card2);border:1px solid var(--line);color:var(--acc2);font-weight:600;font-size:13px;padding:6px 13px;border-radius:999px}

header{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);background:rgba(11,15,26,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.2px}
.logo{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#fff,#cfe0ff);display:grid;place-items:center;color:#0b0f1a;font-weight:900}
.nav .links{display:flex;gap:22px;align-items:center}
.nav .links a{color:var(--mut);font-size:14px;font-weight:600}
.nav .links a:hover{color:var(--tx)}
@media(max-width:820px){.nav .links{display:none}.nav .btn{padding:10px 15px;font-size:13.5px}.brand{font-size:15px}.brand .logo{width:26px;height:26px}}

section{padding:46px 0}
.sec-h{font-size:clamp(22px,3.4vw,32px);margin:0 0 8px;letter-spacing:-.3px}
.sec-sub{color:var(--mut);max-width:680px;margin:0 0 28px}

/* article pages */
.article{max-width:820px;margin:0 auto;padding:48px 0}
.crumb{font-size:13px;color:var(--mut);margin-bottom:14px}
.crumb a:hover{color:var(--tx)}
.article h1{font-size:clamp(26px,4.4vw,40px);line-height:1.12;margin:6px 0 10px;letter-spacing:-.4px}
.article .updated{color:var(--mut);font-size:13px;margin-bottom:26px}
.article h2{font-size:clamp(20px,3vw,26px);margin:34px 0 10px}
.article h3{font-size:18px;margin:24px 0 8px}
.article p{color:#c7d1e6;margin:0 0 14px}
.article ul,.article ol{color:#c7d1e6;margin:0 0 16px;padding-left:22px}
.article li{margin:7px 0}
.article strong{color:var(--tx)}
.callout{background:linear-gradient(135deg,rgba(79,124,255,.14),rgba(122,162,255,.05));border:1px solid var(--acc);border-radius:14px;padding:22px;margin:26px 0;text-align:center}
.callout p{margin:0 0 14px;color:var(--tx)}
.tbl{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.tbl th,.tbl td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.tbl th{background:var(--card2);color:var(--tx)}
.tbl td{color:#c7d1e6}

footer{border-top:1px solid var(--line);margin-top:40px;padding:34px 0;color:var(--mut);font-size:13.5px}
.disc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:0 0 24px;color:var(--mut);font-size:13px}
.fcols{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.fcols a{color:var(--mut)}
.fcols a:hover{color:var(--tx)}