*{box-sizing:border-box}html,body{margin:0;padding:0}
:root{--bg:#0f0f0f;--panel:#171717;--muted:#9aa3af;--txt:#e5e7eb;--accent:#22d3ee}
body{background:var(--bg);color:var(--txt);font:16px/1.6 system-ui,Segoe UI,Roboto,Inter,Arial}
.topbar{padding:24px 16px;border-bottom:1px solid #222;background:#111;position:sticky;top:0}
h1{margin:0 0 4px;font-size:24px} .subtitle{margin:0;color:var(--muted)}
.container{max-width:980px;margin:24px auto;padding:0 16px;display:grid;gap:16px}
.card{background:var(--panel);padding:20px;border:1px solid #222;border-radius:16px;box-shadow:0 6px 24px rgba(0,0,0,.25)}
.row{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}
.btn{padding:10px 14px;border:none;border-radius:12px;background:var(--accent);color:#001015;font-weight:700;cursor:pointer}
.btn:active{transform:translateY(1px)}
.list{margin:0;padding-left:18px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,"Liberation Mono","Courier New",monospace}
.muted{color:var(--muted)}
.footer{padding:24px 16px;color:var(--muted);text-align:center}