:root{--bg:#0b0c10;--fg:#e9eef5;--mut:#9aa3b2;--acc:#4fd1c5;--card:#14161c;--line:#232733}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--acc)}a:hover{text-decoration:underline}
.wrap{max-width:720px;margin:0 auto;padding:0 16px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;flex-wrap:wrap}
.brand{font-weight:900;font-size:20px;letter-spacing:.02em;color:var(--fg);text-decoration:none}.brand span{color:var(--acc)}
nav{display:flex;gap:4px 14px;flex-wrap:wrap;font-size:14px}nav a{color:var(--mut);text-decoration:none}nav a[aria-current]{color:var(--fg);font-weight:600}
.lang{font-size:13px;color:var(--mut)}.lang a{color:var(--mut);text-decoration:none;font-weight:600}
main{padding:24px 0 40px}
h1{font-size:30px;line-height:1.2;margin:0 0 12px}h2{font-size:20px;margin:32px 0 8px}h3{font-size:17px;margin:22px 0 6px}
p,li{color:var(--fg)}.mut{color:var(--mut)}.small{font-size:14px}
.lead{font-size:18px;color:var(--mut)}
.cta{display:inline-block;background:var(--acc);color:#06201d;font-weight:800;padding:12px 22px;border-radius:12px;text-decoration:none;margin:8px 0}
.cta:hover{text-decoration:none;filter:brightness(1.08)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:14px 0}
.steps{counter-reset:s;padding:0;list-style:none}.steps li{position:relative;padding-left:44px;margin:14px 0}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--acc);color:#06201d;font-weight:900;display:flex;align-items:center;justify-content:center}
details{border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin:8px 0;background:var(--card)}summary{cursor:pointer;font-weight:600}
details p{margin:8px 0 2px}
table{width:100%;border-collapse:collapse;font-size:14px;margin:10px 0}th,td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--mut);font-weight:600}
code{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:1px 5px;font-size:13px}
.formula{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-family:ui-monospace,Menlo,monospace;font-size:15px;overflow-x:auto}
.disclaimer{border-left:3px solid var(--acc);padding:6px 12px;color:var(--mut);font-size:14px}
ol.refs{padding-left:20px;font-size:14px;color:var(--mut)}ol.refs li{margin:6px 0}ol.refs a{word-break:break-all}
footer{border-top:1px solid var(--line);padding:18px 0 30px;font-size:13px;color:var(--mut)}
footer .links{display:flex;gap:6px 14px;flex-wrap:wrap;margin-bottom:8px}footer a,footer button{color:var(--mut);text-decoration:none;background:none;border:0;padding:0;font:inherit;cursor:pointer}
footer a:hover,footer button:hover{color:var(--fg)}
.updated{font-size:13px;color:var(--mut);margin:0 0 20px}