:root{
  --bg:#0b0f1a;
  --panel:#151b2d;
  --border:#24304f;
  --text:#e6e9f2;
  --muted:#9aa4c7;
}

*{box-sizing:border-box}

html, body{
  margin:0;
  padding:0;
  height:100%;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,sans-serif;
  display:flex;
  flex-direction:column;
}

header{
  padding:14px;
  text-align:center;
  font-size:18px;
  font-weight:600;
}

.controls{
  display:flex;
  gap:8px;
  justify-content:center;
  padding-bottom:14px;
}

input,button{
  background:var(--panel);
  color:var(--text);
  border:1px solid var(--border);
  padding:6px 10px;
  border-radius:6px;
  font-size:13px;
}

button{cursor:pointer}

main{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:0 12px 32px;
  flex:1;
  min-height:0;
}

.tier{
  display:flex;
  gap:8px;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:8px;
  padding:8px;
  min-height:70px;
}

.tier-label{
  width:78px;
  padding:6px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  font-size:12px;
  font-weight:600;
  line-height:1.15;
  border-radius:6px;
  background:#1c2440;
  color:#fff;
  word-break:break-word;
}

.tier[data-tier="S+"] .tier-label{background:#7a1414}
.tier[data-tier="S"] .tier-label{background:#8a1e1e}
.tier[data-tier="A"] .tier-label{background:#9a4520}
.tier[data-tier="B"] .tier-label{background:#a07a28}
.tier[data-tier="C"] .tier-label{background:#9a9a2a}
.tier[data-tier="D"] .tier-label{background:#2a6fa0}
.tier[data-tier="F"] .tier-label{background:#1f3a8a}

.tier-content{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  align-items:flex-start;
}

.card{
  width:64px;
  background:#1b2340;
  border:1px solid var(--border);
  border-radius:6px;
  padding:4px 4px 6px;
  text-align:center;
  cursor:grab;
  user-select:none;
}

.card:active{cursor:grabbing}

.card img{
  width:48px;
  height:48px;
  display:block;
  margin:0 auto;
  pointer-events:none;
}

.card span{
  display:block;
  margin-top:4px;
  font-size:11px;
  line-height:1.15;
  color:var(--muted);
  word-break:break-word;
}