body, html {
    height: 100%;
    width: 100%;
}

.main-container {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
} 

.main-container  .login,
.main-container .hero {
    height: auto;
    width: 100%;
    max-width: 400px;
    min-width: 300px;
}

.form-inline {
    display: inline-flex;
}