:root {
  color-scheme: light dark;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: #101820;
  color: #f5f7fa;
}

.card {
  width: min(90vw, 420px);
  background: #1b2633;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

h1 {
  margin-top: 0;
  font-size: 1.4rem;
}

p {
  opacity: 0.9;
}

label {
  display: block;
  margin: 12px 0 8px;
}

input {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #3d556e;
  background: #101820;
  color: #f5f7fa;
  box-sizing: border-box;
}

button {
  margin-top: 14px;
  width: 100%;
  padding: 10px;
  border: 0;
  border-radius: 8px;
  background: #47a3ff;
  color: #05131f;
  font-weight: 700;
  cursor: pointer;
}

.error {
  color: #ff8c8c;
  margin-top: 8px;
}