:root{
  --bg: #0b0b12;
  --ink:#e6f7ff;
  --muted:#9fb3c8;
  --accent:#6bffe0;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background: radial-gradient(1200px 700px at 15% 10%, #10202a 0%, #0b0b12 40%, #06050a 100%);
  color:var(--ink); font: 16px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
header{display:flex; align-items:center; justify-content:space-between; gap:20px; padding:18px 22px; position:sticky; top:0; backdrop-filter: blur(6px); background: linear-gradient(180deg, rgba(6,5,10,.8), rgba(6,5,10,.35)); border-bottom:1px solid rgba(255,255,255,.06)}
.brand{display:flex; align-items:center; gap:14px}
.brand img{width:48px; height:48px; border-radius:10px; box-shadow:0 0 20px rgba(107,255,224,.35)}
.brand h1{margin:0; font-weight:800; letter-spacing:.2px}
.tag{margin:0; color:var(--muted)}
nav a{color:var(--muted); text-decoration:none; margin-left:14px}
nav a:hover{color:var(--accent)}
main{max-width:980px; margin: 22px auto; padding: 0 16px}
.panel{background: rgba(255,255,255,.02); border:1px solid rgba(255,255,255,.06); border-radius:14px; padding:12px; margin-bottom:18px; box-shadow: 0 10px 40px rgba(0,0,0,.25)}
#canvas{width:100%; height:60vh; display:block; border-radius:12px; background: radial-gradient(800px 500px at 70% 20%, rgba(19,33,44,.7), rgba(8,10,18,.9))}
.hint{font-size:.9rem; color:var(--muted); text-align:center; margin-top:8px}
.prose h2, .prose h3{margin:.2em 0 .3em}
.prose p{color:#cfe6ff}
footer{max-width:980px; margin:24px auto 40px; color:#7e93a8; padding:0 16px}
code{font-family:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; color:#a9ffe6}