body {
  background: #f4f8fb;
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.container {
  background: white;
  padding: 2em;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  text-align: center;
}
input {
  padding: 0.6em;
  width: 80%;
  margin-bottom: 1em;
}
button {
  background: #007bff;
  color: white;
  padding: 0.6em 1.2em;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
.back-button {
  display: inline-block;
  margin-top: 1.5em;
  background: #007bff;
  padding: 0.5em 1.2em;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
.found {
  color: green;
}
.notfound {
  color: red;
}