style.css

*{
    margin: 0;
    padding: 0;
    font-family: 'poppins',sans-serif;
    box-sizing: border-box;
}
body{
    background-color: #001e4d;
}
.app{
    background-color: #fff;
    width: 90%;
    min-width: 600px;
    margin: 100px auto 0;
    border-radius: 10px;
    padding: 30px;
}
.app h1{
font-weight: 25px;
color: #001e4d;
font-weight: 600;
border-bottom: 1px solid #333;
padding-bottom: 30px;
}
.quiz{
    padding: 20px 0;
}
.quiz h2{
    font-size:18px ;
     color: #001e4d;
     font-weight: 600;
}
.btn{
    background-color: #fff;
    color: #222;
    font-weight: 500;
    width: 100%;
    border: 1px solid #222;
    padding: 10px;
    margin: 10px 0;
    border-radius: 4px;
    text-align: left;
    cursor: pointer;
}
.btn:hover:not([disabled]){
    background-color: #222;
    color: #fff;
}
.btn:disabled{
    cursor:no-drop;
}
#next-btn{
    background-color:#001e4d;
    color: #fff;
    font-weight: 500;
    width: 150px;
    border: 0;
    padding: 10px;
    margin: 20px auto 0;
    border-radius: 4px;
    cursor: pointer;
    display: none;

}
.correct{
    background-color: rgb(133, 237, 131);
}
.incorrect{
    background-color: rgb(243, 120, 86);
}
* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
  }
  
  body {
    background-color: #001e4d;
  }
  
  .app {
    background-color: #fff;
    width: 90%;
    max-width: 600px;
    margin: 50px auto 0;
    border-radius: 10px;
    padding: 15px;
  }
  
  .app h1 {
    font-size: 1.5rem;
    color: #001e4d;
    font-weight: 600;
    border-bottom: 1px solid #333;
    padding-bottom: 15px;
  }
  
  .quiz {
    padding: 10px 0;
  }
  
  .quiz h2 {
    font-size: 1rem;
    color: #001e4d;
    font-weight: 600;
  }
  
  .btn {
    font-size: 0.875rem;
    padding: 8px;
  }
  
  #next-btn {
    font-size: 1rem;
    width: 120px;
    margin: 10px auto 0;
  }