body {
  background: #f6f7f9;
  font-family: 'Inter', Arial, sans-serif;
  color: #222;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
form {
  background: #fff;
  border: 1px solid #e3e6ea;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 2rem 2.5rem;
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
label {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}
input[type='text'],
input[type='password'] {
  padding: 0.7rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 5px;
  font-size: 1rem;
  background: #f9fafb;
  transition: border-color 0.2s;
}
input:focus {
  border-color: #3b82f6;
  outline: none;
}
button {
  padding: 0.8rem 0;
  background: #222;
  color: #fff;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover {
  background: #444;
}
h1 {
  text-align: center;
  margin-bottom: 1.5rem;
}