@media (max-width: 768px) {
  .btn {
    display: block;
    width: 90%;
    margin: 10px auto;
    text-align: center;
  }
}

* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #f5f5f5;
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 20px;
}


.container {
  background: white;
  padding: 25px;
  width: 300px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.container0 {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: white;
  padding: 25px;
  width: 700px;
  height: 700px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
  font-size: 20px;
  text-align: center;
}

h2 {
  font-size: 16px;
  text-align: center;
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 15px;
}

label {
  font-size: 14px;
}

input {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
}

input[type="number"] {
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

#result {
  text-align: center;
  margin-top: 15px;
}
input[type="number"] {
  border: 1px solid #ccc;
  border-radius: 5px;
}

footer {
  text-align: center;
  margin-top: 20px;
  font-size: 12px;
  font-weight: bold;
  color: #777;
}

a {
  text-decoration: none;
  width: 40%;
  padding: 10px;
  background: #ffffff;
  color: #007bff;
  border: 2px solid #007bff;
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
}

a:hover {
  background: #007bff;
  color: white;
}

.btn {
 display: block;
  width: 50%;
  padding: 14px;
  margin-bottom: 12px;
  text-align: center;;
}

.navbar ul{
  list-style-type: none;
  display: flex;
  align-items: center;
  background-color: white;
  gap : 15px;
  padding: 0px;
  margin: 0px;
}

.navbar a{
 text-decoration: none;
  width: 40%;
  padding: 10px;
  background: #ffffff;
  color: #007bff;
  border: 2px solid #007bff;
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
}

 .navbar a:hover{
  background: #007bff;
  color: white;
 }