*{margin:0;padding:0;box-sizing:border-box;font-family:Poppins;}

body{
  height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
  background:linear-gradient(135deg,#667eea,#764ba2);
}

.dark{background:#111;color:white;}

.box{
  width:360px;
  padding:30px;
  border-radius:20px;
  background:rgba(255,255,255,0.15);
  backdrop-filter:blur(15px);
  text-align:center;
}

input{
  width:100%;
  padding:12px;
  margin:10px 0;
  border:none;
  border-radius:10px;
}

button{
  width:100%;
  padding:12px;
  margin:10px 0;
  border:none;
  border-radius:12px;
  background:linear-gradient(135deg,#ff7eb3,#ff758c);
  color:white;
  cursor:pointer;
}

#options button{background:rgba(255,255,255,0.2);}

.selected{background:#00c9ff!important;color:black;}
.correct{background:#28a745!important;}
.wrong{background:#dc3545!important;}

#progress{
  height:10px;
  border-radius:10px;
  background:linear-gradient(to right,#00f260,#0575e6);
  margin:10px 0;
}

ul li{
  background:rgba(255,255,255,0.2);
  margin:5px;
  padding:8px;
  border-radius:8px;
}