body { background-color: #f0f2f5; display: flex; align-items: center; justify-content: center; height: 100vh; margin: 0; }
.login-card { width: 100%; max-width: 400px; padding: 30px; border-radius: 15px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); background: white; }
.logo { font-size: 2rem; font-weight: bold; color: #0d6efd; text-align: center; margin-bottom: 20px; }