body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 0;
  background: #f5f5f5;
}

h2 {
  margin: 10px;
}

#controls {
  margin: 10px auto;
}

#map {
  width: 100%;
  height: 600px;
  margin: 10px auto;
  border: 2px solid #ccc;
  border-radius: 10px;
  position: relative;
}

#info {
  width: 600px;
  margin: 10px auto 30px;
  text-align: left;
  background: #fff;
  padding: 10px;
  border-radius: 5px;
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
}

#network-panel {
  position: fixed;
  top: 0;
  right: -340px;
  width: 320px;
  height: 100%;
  background: #ffffff;
  box-shadow: -3px 0 10px rgba(0,0,0,0.2);
  transition: right 0.4s ease;
  z-index: 1000;
  overflow-y: auto;
}

#network-panel.visible {
  right: 0;
}

.panel-content {
  padding: 20px;
  text-align: left;
}

.signal-bars {
  display: inline-block;
  vertical-align: middle;
  margin-left: 8px;
  height: 14px;
}

.signal-bars div {
  display: inline-block;
  width: 4px;
  margin-right: 2px;
  background: #ccc;
  border-radius: 2px;
  transition: background 0.3s;
}

.signal-bars div.active {
  background: #4caf50;
}

button#toggle-panel {
  margin-left: 10px;
  padding: 5px 10px;
  background: #1976d2;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button#toggle-panel:hover {
  background: #125aa0;
}