body {
  font-family: "Yu Gothic", sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f6fa;
}

header {
  background: #2d3436;
  color: white;
  padding: 15px;
  text-align: center;
  font-size: 20px;
}

#groupNameDisplay {
  margin-top: 5px;
  font-size: 14px;
  color: #dfe6e9;
}

#map {
  width: 90%;
  height: 60vh;
  margin: 20px auto;
  border-radius: 15px;
  box-shadow: 0px 4px 15px rgba(0,0,0,0.2);
}

footer {
  text-align: center;
  padding: 10px;
  color: #666;
}

.center {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 95vh;
}

.card {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  text-align: center;
}

input {
  padding: 10px;
  width: 80%;
  margin-bottom: 15px;
  font-size: 16px;
}

button {
  padding: 10px 20px;
  background: #0984e3;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #74b9ff;
}