:root {
  --primary-color: #1A356E;
  --secondary-color: #999999;
  --text-color: #333;
  --button-hover: #0f2653;
}

body {
  background: linear-gradient(to right, #f0f0f0, #e6ecf5);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', sans-serif;
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 30px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.login-title {
  text-align: center;
  margin-bottom: 20px;
  font-weight: 600;
  color: var(--text-color);
}

.form-control:focus {
  box-shadow: none;
  border-color: var(--primary-color);
}

.btn-login {
  background: var(--primary-color);
  border: none;
  color: white;
  font-weight: 500;
  transition: background 0.3s;
}

.btn-login:hover {
  background: var(--button-hover);
}

.logo {
  display: block;
  margin: 0 auto 20px auto;
  max-width: 200px;
}