gnome-night-theme-switcher/website/style.css

/*
SPDX-FileCopyrightText: Night Theme Switcher Contributors
SPDX-License-Identifier: GPL-3.0-or-later
*/

@font-face {
  font-family: "Cantarell";
  src:
    url("fonts/Cantarell-Regular.woff2") format("woff2"),
    url("fonts/Cantarell-Regular.woff") format("woff");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Cantarell";
  src:
    url("fonts/Cantarell-Bold.woff2") format("woff2"),
    url("fonts/Cantarell-Bold.woff") format("woff");
  font-weight: bold;
  font-style: normal;
  font-display: swap;
}

html,
body,
h1,
p,
ul,
li {
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

@keyframes background {
  from,
  20% {
    background: #020417;
  }
  80%,
  to {
    background: #4995eb;
  }
}

html {
  height: 100%;
  background: #020417;
  font: 1em/1em sans-serif;
  animation: background 20s linear infinite alternate -2s;
}

html::before,
html::after {
  content: "";
  display: block;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

@keyframes background-night {
  from,
  10% {
    background-position-y: bottom;
    opacity: 0;
  }

  30% {
    opacity: 1;
  }

  60%,
  to {
    background-position-y: top;
  }
}

html::before {
  z-index: -2;
  background: radial-gradient(ellipse 200% 100% at 50% 100%, #8d092c, #221a52 50%, #162171) center;
  background-size: 100% 200%;
  animation: background-night 20s linear infinite alternate -2s;
}

@keyframes background-day {
  from,
  35% {
    background-position-y: bottom;
    opacity: 0;
  }

  65% {
    opacity: 1;
  }

  to {
    background-position-y: top;
  }
}

html::after {
  z-index: -1;
  background: radial-gradient(ellipse 200% 100% at 50% 100%, #c79edd, #5a8ae4 50%, #4995eb) center;
  background-size: 100% 200%;
  animation: background-day 20s linear infinite alternate -2s;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100%;
}

@keyframes content {
  from,
  50% {
    border-color: rgba(255, 255, 255, 0.1);
    background: #000;
    color: #fcfcfc;
    --test: #fcfcfc;
  }
  51%,
  to {
    border-color: rgba(0, 0, 0, 0.2);
    background: #fefefe;
    color: #000;
  }
}

.content {
  max-width: 20em;
  padding: 4em 2em 2em;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.5em;
  background: #000;
  color: #fcfcfc;
  font:
    1rem/1.2em Cantarell,
    sans-serif;
  text-align: center;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.2);
  animation: content 20s linear infinite alternate -2s;
}

.title {
  margin: 0 0 2.5rem;
  font-weight: bold;
  font-size: 1.4em;
  line-height: 1.2em;
}

@keyframes icon {
  from,
  50% {
    background: #fcfcfc;
  }
  51%,
  to {
    background: #000;
  }
}

.title::before {
  content: "";
  display: block;
  width: 4em;
  height: 4em;
  margin: 0 auto 2em;
  background: #fcfcfc;
  font-size: 1rem;
  -webkit-mask: url(icon.svg) no-repeat center;
  -webkit-mask-size: 100%;
  mask: url(icon.svg) no-repeat center;
  mask-size: 100%;
  animation: icon 20s linear infinite alternate -2s;
}

.description {
  margin-bottom: 2.5rem;
  font-size: 0.9em;
  line-height: inherit;
}

.button {
  display: inline-block;
  padding: 0.5em 1em;
  border: 0.15em solid;
  border-radius: 0.4em;
  font-size: 1.2em;
  font-weight: bold;
}

.button:hover,
.button:focus {
  text-decoration: underline;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1em 2em;
  margin-top: 4rem;
  font-size: 0.8em;
  text-align: center;
  list-style: none;
}

.link {
  opacity: 0.5;
}

.link:hover,
.link:focus {
  text-decoration: underline;
  opacity: 1;
}

@media (max-width: 26em) {
  body {
    display: block;
    padding: 2em 2em;
    min-height: 0;
  }

  .links {
    display: block;
  }
}