body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #ddd, #eee);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
}

.container {
  width: 400px;
  background-color: white;
  padding: 30px 20px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  color: #2c51ca;
  text-align: center;
}

.form-box {
  margin-bottom: 20px;
  text-align: left;
}

label {
  display: block;
  margin-top: 10px;
  font-size: 17px;
}

input, button {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
}
input:focus{
  border-color: #2f59e0;
  outline: none;
}

button {
  margin-top: 15px;
  background-color: #5c6bc0;
  color: white;
  border: none;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background-color: #3f51b5;
}

.show-grade {
  font-weight: bold;
  font-size: 16px;
  color: green;
  text-align: center;
}
#clearbtn {
  background-color: #f44336;
  color: white;
  border: none;
  font-size: 16px;
  padding: 10px;
  border-radius: 6px;
  cursor: pointer;
}

#clearbtn:hover {
  background-color: #d32f2f;
}