:root{
  --bg:#fafafa;
  --card:#ffffff;
  --text:#111;
  --muted:#666;
  --border:#e6e6e6;
  --shadow:0 1px 8px rgba(0,0,0,.06);
}
*{box-sizing:border-box;}
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  padding: 22px;
  background: var(--bg);
  color: var(--text);
}
.top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:16px;
  margin-bottom: 14px;
}
h1{margin:0 0 6px 0;font-size: 22px;}
.sub{margin:0;color:var(--muted);font-size: 13px;}
.actions{display:flex;gap:10px;}
button{
  padding:10px 12px;
  border:1px solid var(--border);
  background:var(--card);
  border-radius:10px;
  cursor:pointer;
  box-shadow: var(--shadow);
}
button:active{transform: translateY(1px);}
.controls{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  box-shadow: var(--shadow);
}
.row{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:flex-end;
  margin-bottom: 12px;
}
.field{
  display:flex;
  flex-direction:column;
  gap:6px;
  min-width: 220px;
}
.field span{font-size:12px;color:var(--muted);}
select{
  padding:10px 10px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#fff;
}
.toggle{
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:10px;
  background:#fff;
  height: 42px;
}
.toggle span{font-size:14px;}
.grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 10px;
}
.output{
  margin-top: 14px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  box-shadow: var(--shadow);
}
.output label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px;}
textarea{
  width:100%;
  padding:12px;
  border-radius:12px;
  border:1px solid var(--border);
  resize: vertical;
  min-height: 160px;
}
.hint{margin-top:8px;color:var(--muted);font-size: 12px;}
.foot{margin-top: 14px;color:var(--muted);}
details{
  background: var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
}
summary{cursor:pointer;}
.mono{margin-top:10px;font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; line-height: 1.5;}