:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e2230;
  --border: #2a2f3d;
  --text: #e6e8ee;
  --muted: #9aa2b1;
  --accent: #5b8cff;
  --ok: #3fbf6f;
  --warn: #e0a53a;
  --err: #e05a5a;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
.shell { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--panel); border-right: 1px solid var(--border); padding: 16px 0; flex-shrink: 0; }
.sidebar .brand { padding: 0 16px 16px; font-weight: 700; font-size: 18px; }
.poc-badge { font-size: 10px; background: var(--accent); color: #fff; padding: 2px 6px; border-radius: 4px; vertical-align: middle; }
.nav-section { padding: 14px 16px 4px; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.nav-link { display: block; padding: 8px 16px; color: var(--text); text-decoration: none; font-size: 14px; }
.nav-link:hover { background: var(--panel-2); }
.content { flex: 1; padding: 24px 32px; max-width: 1100px; }
h1 { margin-top: 0; }
.banner { padding: 10px 14px; border-radius: 6px; margin-bottom: 20px; font-size: 13px; }
.banner-demo { background: #1c2a44; border: 1px solid var(--accent); color: #cfe0ff; }
.banner-error { background: #3a1c1c; border: 1px solid var(--err); color: #ffd8d8; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; margin-bottom: 18px; }
.card h2, .card h3 { margin-top: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; vertical-align: top; }
th { background: var(--panel-2); }
code, pre { font-family: var(--mono); font-size: 12px; }
pre { background: #0b0d12; padding: 12px; border-radius: 6px; overflow-x: auto; }
.tag { display: inline-block; padding: 1px 7px; border-radius: 10px; font-size: 11px; margin-right: 4px; }
.tag-ok { background: rgba(63,191,111,.15); color: var(--ok); border: 1px solid var(--ok); }
.tag-warn { background: rgba(224,165,58,.15); color: var(--warn); border: 1px solid var(--warn); }
.tag-err { background: rgba(224,90,90,.15); color: var(--err); border: 1px solid var(--err); }
.tag-muted { background: rgba(154,162,177,.15); color: var(--muted); border: 1px solid var(--muted); }
.btn { display: inline-block; background: var(--accent); color: #fff; border: none; padding: 9px 16px; border-radius: 6px; font-size: 14px; cursor: pointer; text-decoration: none; }
.btn:hover { opacity: .9; }
.btn-secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
form.inline { display: inline; }
input[type=text], input[type=file] { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); padding: 8px 10px; border-radius: 6px; font-size: 14px; }
.tree { font-family: var(--mono); font-size: 13px; line-height: 1.7; white-space: pre; }
.muted { color: var(--muted); }
a { color: var(--accent); }
.step-list li { margin-bottom: 8px; }
.kv { display: grid; grid-template-columns: 200px 1fr; gap: 4px 12px; font-size: 13px; }
.kv dt { color: var(--muted); }