:root{
  --screen:#b3e5fc; 
  --dark:#003b57; 
  --light:#e1f5fe;
  --btn:#0288d1; 
  --btn-press:#01579b; 
  --ok:#00c853; 
  --err:#d50000;
}
*{box-sizing:border-box;}
body{
  margin:0;
  background:var(--dark);
  color:var(--light);
  font-family:'VT323',monospace;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  min-height:100vh;
  text-align:center;
  transition:background .5s,color .5s;
}
header{
  font-family:'Press Start 2P',cursive;
  margin-top:10px;
  color:var(--light);
  text-shadow:2px 2px #000;
}
h1,h2{
  font-family:'Press Start 2P',cursive;
  margin:0;
}
.hidden{display:none;}
.warn{color:var(--err);margin-top:10px;}
button{
  font-family:'Press Start 2P',cursive;
  background:var(--btn);
  color:var(--light);
  border:3px solid var(--light);
  border-radius:10px;
  padding:14px 20px;
  font-size:12px;
  cursor:pointer;
  margin:10px auto;
  transition:.15s;
  text-transform:uppercase;
  box-shadow:0 3px 0 #000;
}
button:active{
  background:var(--btn-press);
  transform:translateY(2px);
  box-shadow:none;
}
input{
  font-family:'VT323',monospace;
  font-size:20px;
  padding:10px;
  border:3px solid var(--light);
  border-radius:10px;
  width:80%;
  text-align:center;
}
main{
  background:var(--screen);
  color:var(--dark);
  border:6px solid var(--light);
  border-radius:20px;
  width:90%;
  max-width:720px;
  padding:24px;
  margin:20px auto;
  transition:background .5s,border .5s;
  box-shadow:0 0 0 4px #000;
}
#questionText{
  font-size:22px;
  margin:26px 0 16px;
  font-weight:bold;
}
.choice-btn{
  display:block;
  width:92%;
  font-size:18px;
  margin:8px auto;
  border:3px solid #fff;
  border-radius:12px;
  padding:12px;
  background:var(--btn);
  color:#fff;
}
.choice-btn:active{
  background:var(--btn-press);
}
.feedback{
  min-height:28px;
  font-family:'Press Start 2P';
  font-size:14px;
  margin-top:18px;
}
.ok{color:var(--ok);}
.bad{color:var(--err);}
#lives{
  font-size:24px;
  margin-top:10px;
}
.heart{
  color:#ff1744;
  text-shadow:1px 1px 0 #000;
}
.progress-bar{
  width:100%;
  height:14px;
  background:#e0f7fa;
  border:3px solid var(--dark);
  border-radius:999px;
  margin-top:18px;
  overflow:hidden;
}
.progress-fill{
  height:100%;
  width:0%;
  background:linear-gradient(90deg,#0288d1,#4dd0e1);
  transition:width .3s;
}
#winScreen .big-text{
  font-size:20px;
  color:#1b5e20;
  display:block;
  margin-top:10px;
  text-shadow:2px 2px #fff;
}