* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #f6f3f0;
  font-family: Arial, sans-serif;
  color: #292929;
}

.login-card {
  width: min(90%, 380px);
  padding: 36px;
  background: white;
  border-radius: 18px;
  box-shadow: 0 10px 35px #00000010;
}

h1 { margin-top: 0; }

label {
  display: block;
  margin: 18px 0 7px;
}

input, button {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  font: inherit;
}

input { border: 1px solid #ccc; }

button {
  margin-top: 15px;
  background: #292929;
  color: white;
  border: 0;
  cursor: pointer;
}

#error { color: #b42318; }