:root{
  --bg:#f4f6f9; --card:#fff; --ink:#1a2230; --muted:#5b6675; --line:#e0e5ec;
  --primary:#2563d9; --primary-ink:#fff; --danger:#c0392b; --ok:#2e7d52; --off:#8a94a3;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#0f1319;--card:#171d27;--ink:#e8ecf2;--muted:#9aa6b4;--line:#28313f;--primary:#4b8bff;}
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:1.2rem;text-decoration:none;color:var(--ink)}
.topbar nav{display:flex;gap:12px;align-items:center}
.who{color:var(--muted);font-size:.9rem}
.wrap{max-width:920px;margin:24px auto;padding:0 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:20px}
.card.narrow{max-width:420px;margin:60px auto}
h1{font-size:1.5rem;margin:.2em 0 .6em}
h2{font-size:1.15rem;margin:1.4em 0 .5em;border-top:1px solid var(--line);padding-top:1em}
.head-row{display:flex;justify-content:space-between;align-items:center;gap:12px}
label{display:block;margin:14px 0;font-weight:600}
input,select,textarea{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font-size:1rem;font-weight:400}
textarea{font-family:ui-monospace,Menlo,Consolas,monospace}
.btn{display:inline-block;padding:9px 16px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);font-size:.95rem;font-weight:600;cursor:pointer;text-decoration:none;margin:4px 6px 4px 0}
.btn.primary{background:var(--primary);color:var(--primary-ink);border-color:var(--primary)}
.btn.danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn.ghost{background:transparent}
.btn.small{padding:6px 12px;font-size:.85rem}
.btn.tiny{padding:3px 9px;font-size:.8rem}
.btn-row,.actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px}
.inline{display:inline}
.row-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0}
.row-form input,.row-form select{width:auto;flex:1;min-width:180px;margin-top:0}
.inline-lbl{font-weight:400;display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:0}
.inline-lbl input{width:120px;margin-top:0}
.tbl{width:100%;border-collapse:collapse;margin-top:12px}
.tbl th,.tbl td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}
.tbl th{font-size:.8rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
.creds{width:100%;border-collapse:collapse;margin:12px 0}
.creds th{text-align:left;padding:8px 12px 8px 0;color:var(--muted);font-weight:600;white-space:nowrap;vertical-align:top}
.creds td{padding:8px 0;border-bottom:1px solid var(--line)}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace}
.small{font-size:.85rem}
.muted{color:var(--muted)}
.error{color:var(--danger);font-weight:600}
.warn{background:#fff5e6;border:1px solid #f0c674;color:#7a5b00;padding:10px 14px;border-radius:8px}
@media (prefers-color-scheme: dark){.warn{background:#2a2410;color:#f0c674}}
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:.78rem;font-weight:600;background:var(--line);color:var(--muted)}
.badge.on{background:#e3f4ea;color:var(--ok)}
.badge.off{background:#f1e3e3;color:var(--danger)}
.badge.reg{background:#e3ecf9;color:var(--primary)}
.invite{width:100%;min-height:auto}
.danger-h{color:var(--danger)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:640px){.two-col{grid-template-columns:1fr}}

/* install page: large & high contrast */
body.install{background:#fff;color:#111}
.install-wrap{max-width:760px}
.install h1{font-size:2rem}
.install .lead{font-size:1.25rem}
.install-buttons{display:flex;flex-direction:column;gap:18px;margin:28px 0}
.big-btn{display:block;text-align:center;padding:22px;font-size:1.5rem;font-weight:800;border-radius:14px;text-decoration:none;color:#fff}
.big-btn.ios{background:#0a84ff}
.big-btn.android{background:#1a8a3f}
.steps ol,.pane ol{font-size:1.15rem}
.steps li,.pane li{margin:.4em 0}
.pane{background:#f4f6f9;border:2px solid #d7dee8;border-radius:12px;padding:16px 20px}
.install .note{font-size:1.05rem;background:#fff8e1;border:2px solid #f0c674;padding:12px 16px;border-radius:10px}