*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family:Arial, sans-serif;
}
body{
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
     transition: background 0.5s ease, color 0.4s ease;

}
body.light{
    background-color: #ffffff;
    color: black;
}
body.dark{
    background-color: black;
    color: white;
}
.container{
    text-align: center;
    padding: 30px;
    border-radius: 10px;
      background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}
body.dark .container {
  background: rgba(0, 0, 0, 0.75);
}
h1{
    margin-bottom: 20px;
}
input{
    width:80px ;
    height: 40px;
    border: none;
    cursor: pointer;
}
.buttons{
    margin-top: 15px;
}
 button{
    padding: 8px 12px ;
    border: none;
    border-radius: 6px;
    margin: 8px;
    font-size: 15px;
    cursor: pointer;
}
button:hover{
    opacity: 0.9;
}
#codeText{
    font-weight: bold;
    margin-top: 20px;
}