:root {
    --main-background-color: #121833;
    --main-text-color: #e1e6f0;
    --h1-2-3-4-color: #e1e6f0;
    --left-menu-background: #1a1f3d;
    --header-background: #121833;
    --register-button-background: #1a73e8;
    --register-button-text-color: #ffffff;
    --login-button-background: #4caf50;
    --login-button-text-color: #ffffff;
    --footer-text-color: #6f7a9e;
}