style.css

body {
    font-family: Helvetica, Arial, sans-serif;
    background: #1A1A1A;
    color: #F5F5F5;
}

/* Hide scrollbar for Chrome, Safari, and Opera */
body::-webkit-scrollbar {
    display: none;
}

/* Hide scrollbar for Firefox */
body {
  scrollbar-width: none;
  -ms-overflow-style: none;  /* IE and Edge */
}

.fullscreen {
    height: 100vh;
}

.centered-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.left-container {
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

article {
    margin-left: 1rem;
    margin-right: 1rem;
}

/** font sizes for desktop **/
.header {
    font-size: 8em
}

.sub-header {
    font-size: 4em;
}

p {
    font-size: 2em;
    line-height: 1.5;
}

li {
    font-size: 2em;
    line-height: 1.5;
}

/** font sizes for tablet **/
@media screen and (max-width: 768px) {
    .header {
        font-size: 6em
    }
    
    .sub-header {
        font-size: 3em;
    }
    
    p {
        font-size: 2em;
        line-height: 1.5;
    }
    
    li {
        font-size: 2em;
        line-height: 1.5;
    }
}

/** font sizes for phone **/
@media screen and (max-width: 414px) {
    .header {
        font-size: 3em
    }
    
    .sub-header {
        font-size: 2em;
    }
    
    p {
        font-size: 1.5em;
        line-height: 1.5;
    }
    
    li {
        font-size: 1.5em;
        line-height: 1.5;
    }
}

a {
    color: #999999;  /* Inherits the color of the parent element */
}

.footer-container {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
}

.footer-container article {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-container article p {
    margin-top: 0;
    margin-bottom: 1em;
    font-size: 1.25em;
    line-height: 1;
}