:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #3d9a6a;
  --danger: #c45c5c;
  --warn: #c9a227;
  --free: #4a8fd4;
  --radius: 12px;
  --font: "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #1e3a2f 0%, transparent 50%),
              radial-gradient(900px 500px at 100% 0%, #1a2a3a 0%, transparent 45%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--accent); }
.wrap { max-width: 720px; margin: 0 auto; padding: 1rem 1rem 3rem; }
header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap;
}
header h1 { font-size: 1.35rem; margin: 0; letter-spacing: -0.02em; }
.brand { font-weight: 700; color: var(--accent); }
.nav { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.nav button, .btn {
  background: var(--panel); color: var(--text); border: 1px solid #2a3542;
  border-radius: 999px; padding: 0.45rem 0.9rem; font-size: 0.85rem; cursor: pointer;
}
.nav button.active, .btn.primary { background: var(--accent); border-color: var(--accent); color: #04140c; font-weight: 600; }
.btn.danger { background: var(--danger); border-color: var(--danger); }
.btn.warn { background: var(--warn); border-color: var(--warn); color: #1a1400; }
.btn.free { background: var(--free); border-color: var(--free); color: #041018; }
.panel {
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid #2a3542; border-radius: var(--radius); padding: 1rem; margin-bottom: 1rem;
}
.panel h2 { margin: 0 0 0.75rem; font-size: 1rem; }
label { display: block; font-size: 0.75rem; color: var(--muted); margin: 0.5rem 0 0.2rem; }
input, select, textarea {
  width: 100%; padding: 0.55rem 0.7rem; border-radius: 8px;
  border: 1px solid #2a3542; background: #0d1218; color: var(--text); font: inherit;
}
.row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1; min-width: 120px; }
.device {
  display: flex; justify-content: space-between; gap: 0.75rem; align-items: center;
  padding: 0.75rem 0; border-bottom: 1px solid #243040;
}
.device:last-child { border-bottom: 0; }
.muted { color: var(--muted); font-size: 0.8rem; }
.panic-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.panic-row .btn { padding: 0.85rem; border-radius: var(--radius); font-size: 0.95rem; }
.login {
  max-width: 360px; margin: 15vh auto; padding: 1.5rem;
  background: var(--panel); border-radius: var(--radius); border: 1px solid #2a3542;
}
.err { color: var(--danger); font-size: 0.85rem; margin-top: 0.5rem; }
.code { font-family: ui-monospace, monospace; font-size: 1.4rem; letter-spacing: 0.15em; }