body{
  font-family:sans-serif;
  max-width:600px;
  margin:auto;
  padding:12px;
}

input{
  width:70%;
  padding:10px;
  font-size:16px;
}

button{
  padding:10px;
  font-size:16px;
  margin:4px;
}

.line{
  display:block;
  width:100%;
  text-align:left;
  margin-bottom:4px;
}

.train{
  border:1px solid #ddd;
  border-radius:8px;
  padding:12px;
  margin:6px 0;
}

.favorite{
  background:#fff7d6;
}

.line-row{
  display:flex;
  gap:6px;
  margin-bottom:6px;
}

.line-row .line{
  flex:1;
  margin:0;
}