:root{--ink:#14163A;--muted:#5E6290;--deep:#1E22E0;--bg:#F5F6FF;--card:#fff;--line:#E1E3FA}
@media (prefers-color-scheme:dark){:root{--ink:#ECEEFF;--muted:#A9ACD6;--deep:#8F94FF;--bg:#0E0F24;--card:#17193A;--line:#2A2D5A}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,sans-serif}
header{background:linear-gradient(135deg,#1E22E0,#7B2FF7 60%,#C026D3);color:#fff;padding:32px 20px 40px}
header .in,main{max-width:760px;margin:0 auto}
.logo{font-weight:900;font-size:22px;letter-spacing:-.3px;color:#fff;text-decoration:none}.logo span{color:#FFD43B}
h1{font-size:30px;line-height:1.2;margin:14px 0 6px}header p{margin:0;opacity:.85}
main{padding:24px 20px 60px}section{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin:14px 0}
h2{font-size:19px;margin:0 0 8px}ul{padding-left:20px;margin:8px 0}li{margin:4px 0}a{color:var(--deep)}
.muted{color:var(--muted);font-size:14px}.lang{display:flex;gap:10px;margin-top:16px}.lang a{color:#fff;font-weight:800;opacity:.9}
.btn{display:inline-block;background:#1E22E0;color:#fff;border:0;border-radius:999px;padding:14px 26px;font-size:16px;font-weight:800;cursor:pointer}
.btn[disabled]{opacity:.6}.ok{color:#0E9F6E;font-weight:800}.err{color:#D9246B;font-weight:800}