* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at top, #e8f0ff, #f7f9fc);
  color: #1b2430;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(480px, 100%);
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 12px 30px rgba(16, 24, 40, 0.12);
  display: grid;
  gap: 16px;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

p {
  margin: 0;
  color: #4b5563;
}

.error {
  margin: 0;
  color: #b91c1c;
  font-weight: 600;
}

form {
  display: grid;
  gap: 12px;
}

label {
  font-weight: 600;
}

input {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  font-size: 1rem;
}

button {
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  background: #2563eb;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}