body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background:#f3f4f6;
  margin:0;
  padding:16px;
}
.card{
  max-width:820px;
  margin:0 auto;
  background:#fff;
  border-radius:16px;
  padding:16px;
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
}
h1{font-size:18px;margin:0 0 12px 0;}
.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:12px;
}
@media(min-width:720px){
  .grid{grid-template-columns: 1fr 1fr;}
}
label{
  display:flex;
  flex-direction:column;
  gap:6px;
  font-size:14px;
}
input, select{
  padding:10px 12px;
  border:1px solid #e5e7eb;
  border-radius:10px;
  font-size:14px;
}
input[readonly]{
  background:#f9fafb;
}
.actions{
  display:flex;
  gap:10px;
  margin-top:14px;
}
button{
  flex:1;
  padding:12px 14px;
  border:none;
  border-radius:12px;
  font-size:15px;
  cursor:pointer;
}
button.secondary{
  background:#e5e7eb;
}
button:not(.secondary){
  background:#111827;
  color:#fff;
}
.muted{
  color:#6b7280;
  font-size:12px;
}
.msg{
  margin-top:12px;
  font-size:13px;
  color:#111827;
}