html {height: 100%;}
body {display: flex;justify-content: center;align-items: center;text-align: center;height: 100%;margin: 0;font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";color: #ffffff;background-color: #212529;-webkit-text-size-adjust: 100%;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);min-height: 100vh;background: linear-gradient(135deg, #0b1220 0%, #1e3a8a 55%, #0b1220 100%);}
main {display: inline-block;margin-right: auto;margin-left: auto;}
footer {position: fixed;bottom: 0;right: 0;text-align:center;width:100%}
hr{border:2px solid #eeeeee;margin-right: auto;margin-left: auto;width:100px;}