simple-note/assets/styles/style.css

@font-face {
    font-family: Roboto;
    font-display: swap;
    font-style: normal;
    font-weight: 400;
    src: url("../fonts/roboto/roboto-400.eot");
    src: url("../fonts/roboto/roboto-400.eot?#iefix") format("embedded-opentype"),
         url("../fonts/roboto/roboto-400.woff2") format("woff2"),
         url("../fonts/roboto/roboto-400.woff") format("woff"),
         url("../fonts/roboto/roboto-400.ttf") format("truetype"),
         url("../fonts/roboto/roboto-400.svg#Roboto") format("svg");
}

@font-face {
    font-family: "Roboto Slab";
    font-display: swap;
    font-style: normal;
    font-weight: 500;
    src: url("../fonts/roboto-slab/roboto-slab-500");
    src: url("../fonts/roboto-slab/roboto-slab-500?#iefix") format("embedded-opentype"),
         url("../fonts/roboto-slab/roboto-slab-500.woff2") format("woff2"),
         url("../fonts/roboto-slab/roboto-slab-500.woff") format("woff"),
         url("../fonts/roboto-slab/roboto-slab-500.ttf") format("truetype"),
         url("../fonts/roboto-slab/roboto-slab-500.svg#RobotoSlab") format("svg");
}

:root {
    /* Fonts */
    --font-roboto: Roboto, sans-serif;
    --font-roboto-slab: "Roboto Slab", serif;
    
    --font-1: var(--font-roboto);
    --font-2: var(--font-roboto-slab);

    /* Colors */
    --black: 0, 0%, 0%;
    --white: 0, 0%, 100%;
    --boulder: 0, 0%, 46%;

    --color-1: var(--black), 80%;
    --color-2: var(--white);
    --color-3: var(--boulder), 80%; /* Placeholder and Icons */

    /* Other */
    --focus-outline: 0.125rem solid hsl(var(--color-1));
    --focus-offset: 0;
}

:root[data-theme="dark"] {
    --color-1: var(--white), 80%;
    --color-2: var(--black), 94%;

    --focus-outline: 0.125rem solid hsl(var(--color-1));
}

:root[data-theme="dark"] .settings__button-svg--theme-sun { display: block; }
:root[data-theme="dark"] .settings__button-svg--theme-moon { display: none; }
:root[data-theme="dark"] .settings__button-svg-westtle--background { fill: #ffffff; }
:root[data-theme="dark"] .settings__button-svg-westtle--cat { fill: #000000; }

/* Resets */

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

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

html { min-height: 100%; }

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button,
input,
textarea {
    display: block;
    color: inherit;
    background-color: transparent;
    border: none;
    font: inherit;
}

::placeholder { color: hsl(var(--color-3)); }

html,
body,
main,
.simple-note,
.simple-note__inputs {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

/* Helper */

.--sr-only {
    border: none;
    width: 0.0625rem;
    height: 0.0625rem;
    padding: 0;
    margin: -0.0625rem;
    overflow: hidden;
    white-space: nowrap; 
    position: absolute;
    top: auto;
    left: -99rem;
    clip: rect(0 0 0 0);
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
}

body {
    color: hsl(var(--color-1));
    background-color: hsl(var(--color-2));
    min-height: 21.875rem;
}

/* Settings */

.settings {
    color: hsl(var(--color-3));
    max-width: 1.5rem;

    position: absolute;
    top: 1.125rem;
    left: 1.125rem;
}

.settings__buttons > *,
.settings__button--toggle-settings { margin-bottom: 1.125rem; }
.settings__button--toggle-settings[aria-expanded="true"] { color: hsl(var(--color-1)); }
.settings__button--toggle-settings[aria-expanded="true"] + .settings__buttons { right: 0; }

.settings__buttons {
    width: 100%;
    list-style: none;
    transition: right cubic-bezier(0.45, 0.05, 0.55, 0.95) 0.3s;

    position: relative;
    right: 3.125rem;
}

.settings__button {
    display: block;
    color: inherit;
    width: 100%;
    cursor: pointer;
    transition: color ease-in-out 0.1s;
}

.settings__button:focus-visible {
    --focus-offset: 0.125rem;

    color: hsl(var(--color-1));
    outline: var(--focus-outline);
    outline-offset: var(--focus-offset);
}

@media (hover:hover) {
    .settings__button:hover { color: hsl(var(--color-1)); }
}

.settings__button-svg { width: 100%; }
.settings__button-svg--theme-sun { display: none; }
.settings__button-svg-westtle--background,
.settings__button-svg-westtle--cat { transition: fill ease-in-out 0.1s;}

.settings__separator {
    display: block;
    border-bottom: 2px solid hsl(var(--color-3));
}

/* Simple Note */

.simple-note {
    width: 90%;
    max-width: 29.125rem;
    margin: 0 auto;
    padding: 2rem 0;
}

.simple-note__input {
    padding: 0.5625rem 0.75rem;
    transition: color ease-in-out 0.1s;
}

.simple-note__input:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-offset);
}

.simple-note__input--title {
    font-family: var(--font-2);
    font-size: 1.5rem;
    font-weight: 500;
    line-height: normal;
}

.simple-note__input--body {
    flex-grow: 1;
    font-family: var(--font-1);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    resize: none;
}