:root{--bg:#F4F7FC;--card:#fff;--text:#111318;--muted:#4A5568;--soft:#8A94A6;--line:rgba(17,19,24,.08);--accent:#0A6CFF;--accent-soft:#E3EEFF}
@media (prefers-color-scheme:dark){:root{--bg:#0B0E14;--card:#151A23;--text:#F3F5F9;--muted:#B4BCCB;--soft:#7D879A;--line:rgba(255,255,255,.08);--accent:#5AA9FF;--accent-soft:#16233A}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header.top{padding:22px 0}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text)}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(160deg,#3B8BFF,#0A5BE0);display:grid;place-items:center;color:#fff;font-size:18px}
nav a{color:var(--muted);font-size:15px;margin-left:18px}
h1{font-family:ui-rounded,"SF Pro Rounded",-apple-system,sans-serif;font-size:clamp(32px,6vw,46px);line-height:1.1;margin:28px 0 12px;letter-spacing:-.01em}
h1 em{font-style:normal;color:var(--accent)}
.lead{font-size:19px;color:var(--muted);margin:0 0 28px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 24px;margin:0 0 16px}
.card h2{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--soft);margin:0 0 12px}
.card h3{font-size:17px;margin:18px 0 6px}
.card p,.card li{color:var(--muted);margin:0 0 10px}
.card ul{padding-left:20px;margin:0 0 10px}
.card p:last-child,.card ul:last-child{margin-bottom:0}
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:600;padding:12px 22px;border-radius:999px}
.btn:hover{text-decoration:none;opacity:.92}
.pill{display:inline-block;background:var(--accent-soft);color:var(--accent);font-weight:600;font-size:14px;padding:6px 14px;border-radius:999px;margin:0 6px 8px 0}
details{border-top:1px solid var(--line);padding:14px 0}
details:first-of-type{border-top:0;padding-top:0}
summary{cursor:pointer;font-weight:600;color:var(--text);list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--soft);font-weight:400}
details[open] summary::after{content:"–"}
details p{margin:10px 0 0}
footer{color:var(--soft);font-size:14px;padding:30px 0 50px}
footer a{color:var(--soft);margin-right:16px}