body{margin:0;font-family:"Segoe UI Variable Display","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;color:#c3c9d4;background:#08090b;line-height:1.7;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;left:50%;top:-500px;width:1000px;height:1000px;margin-left:-500px;border-radius:50%;background:radial-gradient(circle,rgba(0,102,255,.2),transparent 60%);pointer-events:none;z-index:-1}
main{width:min(760px,100% - 32px);margin:0 auto;padding:40px 0 90px}
.top{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:40px}
.top img{height:42px;width:auto}
a{color:#00d4ff}
.back{text-decoration:none;font-weight:600}
h1{font-size:clamp(2.4rem,6vw,3.6rem);margin:0 0 28px;letter-spacing:-.03em;color:#fff;font-weight:700;background:linear-gradient(100deg,#0055ff,#0a8bff 50%,#00d9ff);-webkit-background-clip:text;background-clip:text;color:transparent}
h2{font-size:1.1rem;margin:36px 0 8px;color:#fff}
.todo{background:rgba(255,200,0,.15);color:#ffd24d;padding:2px 6px;border-radius:4px}
.hint{background:rgba(255,255,255,.04);box-shadow:inset 0 0 0 1px rgba(0,180,255,.3);padding:16px 20px;border-radius:12px}