:root{
  color-scheme:dark;
  --bg:#0f1115;
  --surface:#171a20;
  --surface-2:#1d2128;
  --border:#2a3038;
  --text:#f4f5f7;
  --muted:#9aa3ad;
  --primary:#4f8cff;
  --primary-hover:#6b9dff;
}
*{box-sizing:border-box}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg);
  color:var(--text);
  font:14px/1.5 Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
button{font:inherit;cursor:pointer}
.hidden{display:none!important}
.page{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:24px;
}
.claim-card{
  width:min(560px,100%);
  padding:28px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:14px;
}
.mode-label{
  display:inline-block;
  margin-bottom:8px;
  padding:5px 8px;
  border-radius:999px;
  background:var(--surface-2);
  color:#c2c9d2;
  font-size:11px;
  font-weight:700;
}
h1,h2{margin:0}
h1{font-size:28px}
h2{font-size:16px}
.claim-head p{
  margin:6px 0 0;
  color:var(--muted);
}
.info-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:8px;
  margin-top:20px;
}
.info-grid div{
  padding:12px;
  background:#13161b;
  border:1px solid var(--border);
  border-radius:10px;
}
.info-grid span{
  display:block;
  color:var(--muted);
  font-size:10px;
}
.info-grid strong{
  display:block;
  margin-top:3px;
  font-size:12px;
}
.section{
  margin-top:20px;
}
.code-list{
  display:grid;
  gap:10px;
  margin-top:10px;
}
.code-card{
  padding:14px;
  background:#13161b;
  border:1px solid var(--border);
  border-radius:10px;
}
.code-card .title{
  font-weight:700;
}
.code-card code{
  display:block;
  margin:9px 0 10px;
  padding:12px;
  background:#0e1115;
  border:1px solid #242a31;
  border-radius:8px;
  color:#cfe4ff;
  font:700 15px/1.45 ui-monospace,SFMono-Regular,Consolas,monospace;
  text-align:center;
  word-break:break-all;
}
.code-card button{
  width:100%;
  padding:9px;
  background:var(--surface-2);
  color:white;
  border:1px solid var(--border);
  border-radius:8px;
  font-weight:700;
}
.code-card small{
  display:block;
  margin-top:7px;
  color:var(--muted);
  font-size:10px;
  text-align:center;
}
.notice{
  padding:14px;
  background:#13161b;
  border:1px solid var(--border);
  border-radius:10px;
}
.notice p{
  margin:5px 0 0;
  color:var(--muted);
}
.btn{
  width:100%;
  margin-top:18px;
  padding:12px 14px;
  border:0;
  border-radius:10px;
  font-weight:700;
}
.btn.primary{
  background:var(--primary);
  color:white;
}
.btn.primary:hover{
  background:var(--primary-hover);
}
.btn:disabled{
  opacity:.55;
  cursor:not-allowed;
}
.alert{
  margin-top:14px;
  padding:11px 12px;
  border-radius:9px;
}
.alert.error{
  background:#3a1b21;
  border:1px solid #6a303b;
  color:#ffb2bb;
}
@media(max-width:560px){
  .page{
    padding:12px;
  }
  .claim-card{
    padding:20px 15px;
  }
  h1{
    font-size:24px;
  }
  .info-grid{
    grid-template-columns:1fr;
  }
  .info-grid div{
    display:flex;
    align-items:center;
    justify-content:space-between;
  }
  .info-grid strong{
    margin:0;
  }
}


.tutorial-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
  margin-top:10px;
}
.tutorial-item{
  overflow:hidden;
  background:#13161b;
  border:1px solid var(--border);
  border-radius:10px;
}
.tutorial-item img,.tutorial-item video{
  display:block;
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  background:#0a0c0f;
}
.tutorial-item video{object-fit:contain}
@media(max-width:560px){
  .tutorial-grid{grid-template-columns:1fr}
}