:root { color-scheme: light; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #f6f7fb;
  color: #111;
}
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 18px;
  background: white;
  border-bottom: 1px solid #e8e8ef;
}
.brand{ font-weight: 700; }
.card{
  width: min(520px, calc(100% - 24px));
  margin: 40px auto;
  padding: 18px 18px 16px;
  background: white;
  border: 1px solid #e8e8ef;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,.05);
}
.form{ display:flex; flex-direction:column; gap: 12px; margin-top: 12px;}
label{ display:flex; flex-direction:column; gap: 6px; font-size: 14px;}
input{
  padding: 10px 12px;
  border: 1px solid #d7d7e2;
  border-radius: 10px;
  font-size: 15px;
}
button{
  padding: 10px 12px;
  border: 1px solid #111;
  background: #111;
  color: white;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
.btn-secondary{
  border: 1px solid #d7d7e2;
  background: #fff;
  color: #111;
}
.alert{
  margin-top: 10px;
  padding: 10px 12px;
  background: #fff3f3;
  border: 1px solid #ffd0d0;
  border-radius: 10px;
}
.hint{ font-size: 13px; opacity: .75; margin-top: 12px; }
code{ background:#f2f2f7; padding:2px 6px; border-radius: 8px; }
.box{
  margin-top: 14px;
  padding: 12px 12px;
  border: 1px dashed #d7d7e2;
  border-radius: 12px;
  background: #fafafe;
}