:root { color-scheme: light; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f4f5f7;
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
.card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
  padding: 40px 36px;
  width: 320px;
}
h1 { font-size: 20px; margin: 0 0 24px; color: #222; }
label {
  display: block;
  font-size: 13px;
  color: #555;
  margin-bottom: 14px;
}
input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid #d7d9dc;
  border-radius: 6px;
  font-size: 14px;
}
button {
  width: 100%;
  padding: 11px;
  margin-top: 8px;
  border: none;
  border-radius: 6px;
  background: #2f6fed;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}
.hint { min-height: 16px; font-size: 12px; color: #888; margin-top: 10px; }