global.css

/* reset */

*,
*::before,
*::after {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

:root {
    font-family: "Ubuntu", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    background-color: #00101a;
    color: #09b4df;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

input,
button,
textarea,
select {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
}
/* fim do reset */

a {
    color: #9c8394;
}
a:hover {
    background: #73abad;
    color: #211830;
}
a:focus {
    outline: 0;
}

pre {
    margin: 2rem 0 0 0;
    font-size: max(0.4rem, 1.5vmin);
}

.main {
    border: 1px solid;
    min-height: 70vh;
}

h1 {
    font-size: 1.5rem;
}

footer {
    text-align: center;
}

b {
    font-weight: bold;
    text-decoration: underline;
}

.back-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #09b4df;
    color: #fffdfa;
}