styles.css

:root {
    --font: 'Open Sans';

    --bg0-light: #f9f9f9;
    --bg1-light: #f9f9f9;
    --bg2-light: #dcdcdc;
    --fg0-light: #000000;
    --fg1-light: #b9b9b9;
    --accent-light: #8ab4f8;

    --bg0-dark: #121212;
    --bg1-dark: #1e1e1e;
    --bg2-dark: #2e2e2e;
    --fg0-dark: #ffffff;
    --fg1-dark: #6f6f6f;
    --accent-dark: #8ab4f8;
}

* {
    margin: 0;
    padding: 0;
    outline: none;
    font-family: var(--font), Roboto, 'DejaVu Sans', Arial, Verdana, sans-serif;
    text-decoration: none;
    color: inherit;
    border: none;
    box-sizing: border-box;
    transition: ease-in-out 200ms;
}

body {
    --bg0: var(--bg0-light);
    --bg1: var(--bg1-light);
    --bg2: var(--bg2-light);
    --fg0: var(--fg0-light);
    --fg1: var(--fg1-light);
    --accent: var(--accent-light);

    height: 100vh;
    width: 100vw;
    font-size: 16px;
    color: var(--fg0);
    background-color: var(--bg0);
    display: flex;
    flex-flow: column;
    justify-content: space-between;
}

body.dark {
    --bg0: var(--bg0-dark);
    --bg1: var(--bg1-dark);
    --bg2: var(--bg2-dark);
    --fg0: var(--fg0-dark);
    --fg1: var(--fg1-dark);
    --accent: var(--accent-dark);
}

.button {
    height: 2.5rem;
    width: 2.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}

.button:hover {
    background: var(--bg2);
}

.redButton:hover {
    color: #ff0000 !important;
    background: #ff000020 !important;
}

.icon {
    font-size: 2rem;
    opacity: 50%;
    cursor: pointer;
}

.linkLabeled {
    font-size: 1.1rem;
    opacity: 50%;
}

.linkLabeled:not(:last-of-type) {
    margin-right: 1.5rem;
}

.icon:hover,
.icon:focus,
.linkLabeled:hover,
.linkLabeled:focus {
    opacity: 100%;
}

#mainBox {
    display: flex;
    flex-flow: row nowrap;
    margin: auto 6rem;
    padding-top: 3rem;
}

#linksLabeledBox {
    display: flex;
    margin: 3rem 6rem;
}

#linksIconicBox {
    display: flex;
    flex-flow: column;
    justify-content: center;
    align-items: center;
}

#linksIconicBox > .icon {
    margin: 0.5rem 2rem 0.5rem 0;
}

#infoBox {
    display: flex;
    flex-flow: column;
    align-items: start;
    justify-content: center;
}

#currentTime {
    margin-top: -1.5rem;
    font-size: 5rem;
    font-weight: bold;
}

#currentDate {
    font-size: 1.5rem;
}

#quote {
    font-style: italic;
    margin-top: 1rem;
    max-width: 30rem;
}
#quoteAuthor {
    margin-top: 0.5rem;
    opacity: 50%;
}

#settingsIcon {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1000;
    margin: 0.5rem;
}

#settingsBox {
    height: 100vh;
    width: 0;
    max-width: 30rem;
    position: fixed;
    right: 0;
    z-index: 1001;
    background: var(--bg1);
    border-left: 1px solid var(--bg2);
    box-shadow: 0 0 3rem -2rem black;
}

#settingsHeader {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    border-bottom: 1px solid var(--bg2);
}

#settingsHeader > span {
    font-size: 1.25rem;
}

#settingsHeader > .icon {
    font-size: 2rem;
}

#settingsForm {
    height: 100%;
    padding: 1.5rem;
    overflow-x: hidden;
    overflow-y: auto;
}

#settingsForm > .addButton {
    width: 100%;
    height: 2rem;
    border-radius: 1rem;
    margin-top: -0.5rem;
}

#settingsForm > *:not(:last-child) {
    margin-bottom: 1rem;
}

#settingsForm fieldset {
    width: 100%;
}

fieldset > *:not(:last-child) {
    margin-bottom: 0.5rem;
}

input, select {
    background: var(--bg2);
    color: var(--fg0);
    height: 2rem;
    border: 2px solid transparent;
    border-radius: 1rem;
    padding: 0 0.5rem;
}

input:focus, select:focus {
    border: 2px solid var(--accent);
}

.fieldsetCheckboxBox {
    display: flex;
    align-items: center;
    margin: 0 !important;
}

.fieldsetCheckboxBox > input {
    margin-right: 0.5rem;
}

.fieldsetLinkBox {
    display: flex;
    flex-flow: row nowrap;
}

.fieldsetLinkBox > input {
    width: calc((100% - 2rem) / 2);
    height: 2rem;
    margin-right: 0.25rem;
}

.fieldsetLinkBox > i {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 2rem;
    width: 2rem;
    padding: 0.25rem;
    border-radius: 1rem;
    cursor: pointer;
}

.fieldsetLinkBox > i:hover {
    background: var(--bg2);
}