body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f172a;
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card {
  background: #1e293b;
  padding: 32px 36px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  width: 100%;
  max-width: 320px;
  box-sizing: border-box;
}
h1 {
  color: #f8fafc;
  font-size: 20px;
  margin: 0 0 20px 0;
}
label {
  display: block;
  color: #cbd5e1;
  font-size: 13px;
  margin-bottom: 4px;
}
input {
  width: 100%;
  box-sizing: border-box;
  padding: 8px 10px;
  margin-bottom: 14px;
  border-radius: 6px;
  border: 1px solid #334155;
  background: #0f172a;
  color: #f8fafc;
  font-size: 14px;
}
button {
  width: 100%;
  padding: 9px;
  border: none;
  border-radius: 6px;
  background: #0284c7;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}
button:hover {
  background: #0369a1;
}
.error {
  background: #fee2e2;
  color: #991b1b;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 14px;
}