:root{
  --bg:#050507;--surface:rgba(255,255,255,0.03);--line:rgba(255,255,255,0.09);--line-soft:rgba(255,255,255,0.06);
  --text:#F5F6FA;--text-dim:rgba(228,231,242,0.70);--text-faint:rgba(228,231,242,0.42);
  --blue:#4D7CFE;--blue-bright:#6E9BFF;--violet:#8B5CF6;
  --grad:linear-gradient(100deg,#6E9BFF 0%,#4D7CFE 38%,#8B5CF6 100%);
  --font-display:'Space Grotesk',sans-serif;--font-body:'Inter',sans-serif;--font-mono:'JetBrains Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
body:before{content:'';position:fixed;top:-220px;right:-160px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,rgba(77,124,254,.35),transparent 65%);filter:blur(110px);pointer-events:none;z-index:0}
a{color:var(--blue-bright)}
a:hover{color:#fff}
.wrap{max-width:820px;margin:0 auto;padding:0 28px;position:relative;z-index:1}
header{border-bottom:1px solid var(--line-soft);position:relative;z-index:1}
.bar{max-width:820px;margin:0 auto;padding:20px 28px;display:flex;justify-content:space-between;align-items:center}
.logo{font-family:var(--font-display);font-weight:700;font-size:20px;letter-spacing:-.02em;color:var(--text);text-decoration:none}
.bar nav a{font-size:14px;color:var(--text-dim);text-decoration:none;margin-left:22px}
.bar nav a:hover{color:var(--text)}
main{padding:64px 0 80px}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-faint)}
h1{font-family:var(--font-display);font-size:clamp(34px,5vw,48px);line-height:1.1;letter-spacing:-.03em;margin:12px 0 14px}
h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.meta{color:var(--text-faint);font-size:14px;margin-bottom:40px}
h2{font-family:var(--font-display);font-size:22px;letter-spacing:-.01em;margin:44px 0 12px;scroll-margin-top:24px}
h3{font-family:var(--font-display);font-size:17px;margin:24px 0 8px}
p,li{color:var(--text-dim)}
p+p{margin-top:12px}
ul,ol{padding-left:22px;margin:10px 0}
li{margin:6px 0}
strong{color:var(--text);font-weight:600}
.toc,.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 26px;margin:24px 0}
.toc ol{columns:2;column-gap:32px;margin:0}
.toc a{color:var(--text-dim);text-decoration:none}
.toc a:hover{color:var(--text)}
.callout{border-left:3px solid var(--blue);padding:4px 0 4px 18px;margin:20px 0}
table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line-soft);vertical-align:top;color:var(--text-dim)}
th{color:var(--text);font-weight:600}
form{display:grid;gap:16px;margin-top:8px}
label{display:grid;gap:6px;font-size:14px;color:var(--text)}
input,textarea,select{font:inherit;color:var(--text);background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:10px;padding:11px 14px}
input:focus,textarea:focus,select:focus{outline:2px solid var(--blue);outline-offset:1px}
select option{background:#0A0A10}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-dim)}
.check input{margin-top:5px}
.btn{display:inline-flex;justify-content:center;font-family:var(--font-display);font-weight:600;font-size:15px;padding:13px 26px;border-radius:999px;border:0;cursor:pointer;background:var(--grad);color:#fff;text-decoration:none;justify-self:start}
.hidden{display:none}
.status{font-family:var(--font-mono);font-size:14px}
footer{border-top:1px solid var(--line-soft);padding:28px 0;font-size:13px;color:var(--text-faint);position:relative;z-index:1}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--text-dim);text-decoration:none;margin-left:16px}
@media (max-width:640px){.toc ol{columns:1}.bar nav a{margin-left:14px}}