:root {
  --bg: #0b0f14;
  --panel: #11161d;
  --panel2: #161d26;
  --text: #c9d4e3;
  --muted: #76808f;
  --green: #27e07d;
  --red: #ff5d5d;
  --accent: #3aa0ff;
  --border: #1f2937;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, "Segoe UI", Roboto, sans-serif;
}

.hidden { display: none !important; }

/* login gate */
.gate {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at 30% 20%, #122033 0%, var(--bg) 60%);
}
.gate-card {
  text-align: center;
  padding: 48px 56px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.gate-card h1 { letter-spacing: 0.35em; font-size: 22px; }
.gate-card p { color: var(--muted); margin: 8px 0 28px; }
.gate-card button {
  background: var(--accent); color: #fff; border: 0;
  padding: 12px 26px; border-radius: 6px; font-size: 15px; cursor: pointer;
}
.gate-card button:hover { filter: brightness(1.1); }

/* topbar */
#topbar {
  position: fixed; top: 0; left: 0; right: 0; height: 46px; z-index: 20;
  display: flex; align-items: center; gap: 14px; padding: 0 16px;
  background: rgba(13, 18, 25, 0.92); border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}
.brand { letter-spacing: 0.3em; font-weight: 600; font-size: 13px; }
.env-tag {
  font-size: 10px; letter-spacing: 0.12em; color: var(--green);
  border: 1px solid var(--green); border-radius: 3px; padding: 2px 6px;
}
.stats { color: var(--muted); font-size: 12px; }
.spacer { flex: 1; }
#user-email { color: var(--muted); font-size: 12px; }
button.ghost {
  background: none; border: 1px solid var(--border); color: var(--muted);
  padding: 5px 12px; border-radius: 5px; cursor: pointer; font-size: 12px;
}
button.ghost:hover { color: var(--text); border-color: var(--muted); }

/* sidebar */
#sidebar {
  position: fixed; top: 46px; left: 0; bottom: 0; width: 300px; z-index: 15;
  background: var(--panel); border-right: 1px solid var(--border);
  padding: 16px; overflow-y: auto;
}
#sidebar h2 {
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin: 14px 0 8px;
}
#sidebar h2:first-child { margin-top: 0; }

.hub {
  background: var(--panel2); border: 1px solid var(--border);
  border-radius: 7px; padding: 10px 12px; margin-bottom: 8px;
}
.hub-head { display: flex; align-items: center; gap: 8px; }
.hub-head .tier {
  margin-left: auto; font-size: 10px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.1em;
}
.meta { color: var(--muted); font-size: 11.5px; margin-top: 3px; }
.spoke {
  display: flex; align-items: center; gap: 7px;
  margin-top: 6px; padding-left: 6px; font-size: 12.5px;
}

.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--muted); flex-shrink: 0;
}
.dot.on { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot.off { background: var(--red); }

.track-list .row {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 8px; border-radius: 5px; cursor: pointer; font-size: 12.5px;
}
.track-list .row:hover { background: var(--panel2); }
.track-list .row .id { font-weight: 500; }
.track-list .row .meta { margin: 0; margin-left: auto; }
.track-list .row.live .dot { background: var(--green); }

/* map + detail */
#map { position: fixed; top: 46px; left: 300px; right: 0; bottom: 0; }

.detail {
  position: fixed; right: 16px; top: 62px; z-index: 18; width: 280px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px;
}
.detail h3 { font-size: 14px; margin-bottom: 10px; }
.detail table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.detail td { padding: 3px 0; }
.detail td:first-child { color: var(--muted); width: 45%; }
.detail .close {
  position: absolute; top: 8px; right: 10px;
  background: none; border: 0; color: var(--muted);
  font-size: 16px; cursor: pointer;
}
.detail code { font-size: 11px; color: var(--accent); }

@media (max-width: 760px) {
  #sidebar { display: none; }
  #map { left: 0; }
}