:root{color-scheme:dark;font-family:Inter,Arial,sans-serif;background:#07101f;color:#edf2ff}body{margin:0;background:radial-gradient(circle at top,#0d1730,#050b14 70%)}*{box-sizing:border-box}.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.sidebar{padding:24px;border-right:1px solid rgba(255,255,255,.08);background:#010a16d9}.sidebar nav{display:grid;gap:10px;margin-top:24px}.sidebar a{color:#cfe1ff;text-decoration:none;padding:12px 14px;border-radius:12px;background:#ffffff08}.main{padding:28px}.hero{margin-bottom:24px}.card{background:#0c172ceb;border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:24px}.muted{color:#9cb0d1}@media (max-width: 900px){.app{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid rgba(255,255,255,.08)}}