style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');

html {
    box-sizing: border-box;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Roboto', sans-serif;
    font-size: xx-large;
    transition: all 0.3s ease;
}

.light {
    background-color: #f9f9f9;
    color: #272727;
}

.dark {
    background-color: #222831;
    color: #eeeeee;
}

#main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.light-mode-selector {
    width: 1.5em;
    height: 1.5em;
    position: absolute;
    top: 1em;
    right: 1em;
    transition: all 0.3s ease;
    background-color: transparent;
}

.light-mode-selector.light {
    fill: #272727;
}

#light-mode.dark {
    display: none;
}

#dark-mode.light {
    display: none;
}

.light-mode-selector.dark {
    fill: #eeeeee;
}

.light-mode-selector:hover {
    transform: scale(1.2);
    cursor: pointer;
}

#name {
    font-size: 3em;
}

.icon {
    width: 3em;
    height: 3em;
    margin-right: 0.5em;
    margin-left: 0.5em;
    transition: all 0.3s ease;
}

.icon.light {
    fill: #272727;
}

.icon.dark {
    fill: #eeeeee;
}

.icon:hover {
    transform: scale(1.2);
}

.icon-link {
    text-decoration: none;
}

@media screen and (max-width: 600px) {
    body {
        font-size: large;
    }
}