:root{
  --bg:#161311;
  --panel:#211c18;
  --panel-2:#2a231d;
  --gold:#c8952a;
  --gold-bright:#f0b93e;
  --radiant:#8fbf5f;
  --dire:#c25b4a;
  --text:#ede4d3;
  --text-dim:#9c8f7c;
  --line:#3a322a;
}
*{box-sizing:border-box;}
html, body{height:100%;}
body{
  margin:0;
  background:
    radial-gradient(ellipse at top, #241f1a 0%, var(--bg) 55%);
  color:var(--text);
  font-family: 'Georgia', 'Iowan Old Style', serif;
  display:flex;
  align-items:center;
  justify-content:center;
}
.wrap{
  max-width:720px;
  width:100%;
  padding:28px 16px 60px;
}
h1{
  font-family: 'Trajan Pro','Cinzel',Georgia,serif;
  letter-spacing:2px;
  text-transform:uppercase;
  font-size:22px;
  text-align:center;
  color:var(--gold-bright);
  margin:0 0 4px;
  text-shadow:0 0 12px rgba(240,185,62,0.25);
}
.sub{
  text-align:center;
  color:var(--text-dim);
  font-size:13px;
  margin-bottom:22px;
  font-family: -apple-system, sans-serif;
}

.controls{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  justify-content:center;
  margin-bottom:18px;
}
select, button{
  font-family:-apple-system, sans-serif;
  font-size:13px;
  background:var(--panel-2);
  color:var(--text);
  border:1px solid var(--line);
  border-radius:6px;
  padding:8px 12px;
  cursor:pointer;
}
select:focus, button:focus{outline:1px solid var(--gold);}
button:hover{border-color:var(--gold);}
button.primary{
  background:linear-gradient(180deg,#4a3a1f,#2e2413);
  border-color:var(--gold);
  color:var(--gold-bright);
  font-weight:bold;
}

.stagewrap{
  display:flex;
  justify-content:center;
  margin-bottom:14px;
}
.card{
  width:100%;
  max-width:420px;
  height:260px;
  perspective:1200px;
  cursor:pointer;
}
.card-inner{
  position:relative;
  width:100%;
  height:100%;
  transition:transform .5s cubic-bezier(.4,.2,.2,1);
  transform-style:preserve-3d;
}
.card.flipped .card-inner{transform:rotateY(180deg);}
.face{
  position:absolute;
  inset:0;
  border-radius:14px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  backface-visibility:hidden;
  padding:24px;
  text-align:center;
  background:
    linear-gradient(160deg, var(--panel) 0%, var(--panel-2) 100%);
  border:1px solid var(--line);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(200,149,42,0.08);
}
#frontContent, #backContent{
  width:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  margin-top:32px; /* offset for cat-tag visual balance */
}
.face.front{}
.face.back{transform:rotateY(180deg);}

.cat-tag{
  position:absolute;
  top:14px; left:14px;
  font-family:-apple-system, sans-serif;
  font-size:10px;
  letter-spacing:1px;
  text-transform:uppercase;
  color:var(--text-dim);
  border:1px solid var(--line);
  padding:3px 8px;
  border-radius:20px;
}
.idx-tag{
  position:absolute;
  top:14px; right:14px;
  font-family:-apple-system, sans-serif;
  font-size:11px;
  color:var(--text-dim);
}

.item-name{
  font-size:26px;
  color:var(--text);
  margin-bottom:6px;
  line-height:1.2;
}
.hint{
  font-family:-apple-system, sans-serif;
  font-size:12px;
  color:var(--text-dim);
  margin-top:14px;
}
.cost{
  font-size:44px;
  color:var(--gold-bright);
  font-weight:bold;
  display:flex;
  align-items:center;
  gap:8px;
  text-shadow:0 0 18px rgba(240,185,62,0.35);
}
.coin{
  width:21px;height:21px;
  background:url('images/coin.png') no-repeat center/contain;
  flex-shrink:0;
}
  .item-icon{
    width:85px;height:64px;
    margin-bottom:8px;
    image-rendering:pixelated;
    filter:drop-shadow(0 2px 4px rgba(0,0,0,0.4));
  }
  .back .item-name{
  font-size:18px;
  color:var(--text-dim);
  margin-bottom:2px;
}

.actions{
  display:flex;
  justify-content:center;
  gap:10px;
  margin-top:6px;
}
.actions button{
  min-width:110px;
}
.know-btn{color:var(--radiant); border-color:var(--radiant);}
.dontknow-btn{color:var(--dire); border-color:var(--dire);}

.progress-row{
  display:flex;
  justify-content:center;
  align-items:center;
  gap:14px;
  font-family:-apple-system, sans-serif;
  font-size:12px;
  color:var(--text-dim);
  margin:16px 0 6px;
}
.bar{
  width:200px;height:6px;
  background:var(--line);
  border-radius:4px;
  overflow:hidden;
}
.bar-fill{
  height:100%;
  background:linear-gradient(90deg,var(--radiant),var(--gold));
}

.summary{
  text-align:center;
  font-family:-apple-system, sans-serif;
  color:var(--text-dim);
  font-size:13px;
  margin-top:6px;
}
.summary b{color:var(--gold-bright);}

.footer-note{
  text-align:center;
  color:var(--text-dim);
  font-family:-apple-system, sans-serif;
  font-size:11px;
  margin-top:30px;
  opacity:.7;
}

@media (max-width:480px){
  .card{height:230px;}
  .item-name{font-size:21px;}
  .cost{font-size:34px;}
}