style.css

@import url("https://fonts.googleapis.com/css2?family=Quicksand:wght@700&display=swap");

/* ---↓--- CSS reset ---↓--- */

*,
html {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Quicksand", sans-serif;
}

/* ---↓--- Color variables ---↓--- */

:root {
  --black: black;
  --white: white;
  --grey: #363636;

  --yellow: #fff388;
  --blue: #42f0e6;
  --pink: #e140e4;
}

/* ---↓--- Body ---↓--- */

body {
  display: flex;
}

/* ---↓--- Header ---↓--- */

header {
  background-color: #574f3e;
  width: 40vw;
  height: 100vh;
  color: white;
  border-right: 1.5em solid var(--grey);
  display: flex;
  flex-direction: column;
  gap: 3em;
  justify-content: center;
  align-items: center;
}

/* ---↓--- On/off switch ---↓--- */

header > div:nth-of-type(1) input[type="checkbox"] {
  visibility: hidden;
  display: none;
}

header > div:nth-of-type(1) label {
  display: inline-block;
  position: relative;
  font-size: 2em;
  text-align: center;
  color: var(--black);
  width: 7em;
  height: 4em;
  overflow: hidden;
  border-bottom: 0.5em solid var(--grey);
}

header > div:nth-of-type(1) label::before {
  content: "";
  position: absolute;
  top: 0.5em;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--black);
  border: 0.5em solid var(--grey);
  border-bottom: 0;
}

header > div:nth-of-type(1) label span:nth-of-type(1),
header > div:nth-of-type(1) label span:nth-of-type(2) {
  cursor: pointer;
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 2.5em;
  width: 3em;
  transition: 0.2s;
  user-select: none;
}

header > div:nth-of-type(1) label span:nth-of-type(1) {
  height: 2.4em;
  width: 2.75em;
  left: 0.85em;
  bottom: 0.4em;
  background-color: var(--white);
  transform: rotate(15deg) skewX(15deg);
}

header > div:nth-of-type(1) label span:nth-of-type(2) {
  right: 0.5em;
  bottom: 0;
  background-color: var(--white);
  color: var(--black);
}

header > div:nth-of-type(1) label span:nth-of-type(1)::before,
header > div:nth-of-type(1) label span:nth-of-type(2)::before {
  content: "";
  position: absolute;
  width: 0.4em;
  height: 2.45em;
  bottom: -0.45em;
  background-color: var(--black);
  transform: skewY(-65deg);
}

header > div:nth-of-type(1) label span:nth-of-type(1)::before {
  left: -0.4em;
}

header > div:nth-of-type(1) label span:nth-of-type(2)::before {
  right: -0.375em;
  background-color: transparent;
  transform: skewY(65deg);
}

header > div:nth-of-type(1) input:checked + span:nth-of-type(1) {
  bottom: 0px;
  left: 0.5em;
  height: 2.5em;
  width: 3em;
  transform: rotate(0deg) skewX(0deg);
}

header > div:nth-of-type(1) input:checked + span:nth-of-type(1)::before {
  background-color: transparent;
  width: 3.0833em;
}

header
  > div:nth-of-type(1)
  input:checked
  + span:nth-of-type(1)
  + span:nth-of-type(2) {
  bottom: 0.4em;
  right: 0.8em;
  height: 2.4em;
  width: 2.75em;
  transform: rotate(-15deg) skewX(-15deg);
}

header
  > div:nth-of-type(1)
  input:checked
  + span:nth-of-type(1)
  + span:nth-of-type(2)::before {
  background-color: var(--black);
}

body:has(header > div:nth-of-type(1) input:checked)
  main
  section
  div:nth-of-type(3) {
  display: block;
}

/* ---↓--- Range dim light ---↓--- */

input[type="range"] {
  transform: rotate(-90deg);
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  width: 18em;
  height: 18em;
}

input[type="range"]::-webkit-slider-runnable-track {
  background: var(--grey);
  border-radius: 0;
  height: 2em;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -1.5em;
  background: var(--white);
  height: 5em;
  width: 2em;
  border-radius: 0;
}

head[data--x="9"] + body main section div:nth-of-type(3) {
  opacity: 0.9;
}
head[data--x="8"] + body main section div:nth-of-type(3) {
  opacity: 0.8;
}
head[data--x="7"] + body main section div:nth-of-type(3) {
  opacity: 0.7;
}
head[data--x="6"] + body main section div:nth-of-type(3) {
  opacity: 0.6;
}
head[data--x="5"] + body main section div:nth-of-type(3) {
  opacity: 0.5;
}
head[data--x="4"] + body main section div:nth-of-type(3) {
  opacity: 0.4;
}
head[data--x="3"] + body main section div:nth-of-type(3) {
  opacity: 0.3;
}
head[data--x="2"] + body main section div:nth-of-type(3) {
  opacity: 0.2;
}
head[data--x="1"] + body main section div:nth-of-type(3) {
  opacity: 0.1;
}
head[data--x="0"] + body main section div:nth-of-type(3) {
  opacity: 0;
}

/* ---↓--- Select light color ---↓--- */

header > div:nth-of-type(3) {
  display: flex;
  gap: 2em;
}

header > div:nth-of-type(3) input[type="radio"] {
  display: none;
}

header > div:nth-of-type(3) label span {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 5em;
  height: 5em;
  cursor: pointer;
  border-radius: 0;
  border: 1em solid var(--grey);
}

header > div:nth-of-type(3) div:nth-of-type(1) label span {
  background-color: var(--yellow);
}

header > div:nth-of-type(3) div:nth-of-type(2) label span {
  background-color: var(--blue);
}

header > div:nth-of-type(3) div:nth-of-type(3) label span {
  background-color: var(--pink);
}

header > div:nth-of-type(3) input[type="radio"] + label span img {
  opacity: 0;
  width: 2em;
}

header > div:nth-of-type(3) input[type="radio"]:checked + label span img {
  opacity: 1;
}

body:has(header > div:nth-of-type(3) div:nth-of-type(1) input:checked)
  main
  section
  div:nth-of-type(3) {
  background-color: var(--yellow);
  box-shadow: 0px 0px 10em 10em #fff38844, 0px 0px 20em 20em #fff3881c;
  transition: 2s;
}

body:has(header > div:nth-of-type(3) div:nth-of-type(2) input:checked)
  main
  section
  div:nth-of-type(3) {
  background-color: var(--blue);
  box-shadow: 0px 0px 10em 10em #42f0e745, 0px 0px 20em 20em #42f0e71d;
  transition: 2s;
}

body:has(header > div:nth-of-type(3) div:nth-of-type(3) input:checked)
  main
  section
  div:nth-of-type(3) {
  background-color: var(--pink);
  box-shadow: 0px 0px 10em 10em #e140e43c, 0px 0px 20em 20em #e140e41a;
  transition: 2s;
}

/* ---↓--- Partymode ---↓--- */

@keyframes party {
  0% {
    background-color: var(--yellow);
    box-shadow: 0px 0px 10em 10em #fff38844, 0px 0px 20em 20em #fff3881c;
  }
  33.3% {
    background-color: var(--blue);
    box-shadow: 0px 0px 10em 10em #42f0e745, 0px 0px 20em 20em #42f0e71d;
  }
  66.6% {
    background-color: var(--pink);
    box-shadow: 0px 0px 10em 10em #e140e43c, 0px 0px 20em 20em #e140e41a;
  }
  100% {
    background-color: var(--yellow);
    box-shadow: 0px 0px 10em 10em #fff38844, 0px 0px 20em 20em #fff3881c;
  }
}

body:has(header > div:nth-of-type(4) input:checked)
  main
  section
  div:nth-of-type(3) {
  animation: party 1s linear infinite;
}

@keyframes bounce {
  from,
  to {
    transform: scale(1, 1);
  }
  25% {
    transform: scale(0.9, 1.1);
  }
  50% {
    transform: scale(1.1, 0.9);
  }
  75% {
    transform: scale(0.95, 1.05);
  }
}

body:has(header > div:nth-of-type(4) input:checked) main section > div {
  margin-top: -0.5em;
  animation: bounce 0.5s infinite;
}

header > div:nth-of-type(4) {
  display: flex;
  gap: 0.5em;
  align-items: center;
}

header > div:nth-of-type(4) p {
  font-size: 1.2em;
}

header > div:nth-of-type(4) input {
  display: none;
}

header > div:nth-of-type(4) label span {
  display: flex;
  justify-content: center;
  background-color: var(--white);
  align-items: center;
  width: 3em;
  height: 3em;
  cursor: pointer;
  border-radius: 0;
  border: 0.5em solid var(--grey);
}

header > div:nth-of-type(4) label span img {
  opacity: 0;
  width: 1em;
}

header > div:nth-of-type(4) input:checked + label span img {
  opacity: 1;
}

/* ---↓--- Room styling ---↓--- */

main {
  width: 60vw;
  height: 100vh;
  background: repeating-linear-gradient(
    45deg,
    #574f3e,
    #574f3e 20px,
    #26231c 20px,
    #26231c 80px
  );
}

main section {
  background-color: #1b1a17;
  width: 60vw;
  height: 80vh;
  position: relative;
  border-bottom: 1em solid black;
}

/* ---↓--- Light styling ---↓--- */

main section div:nth-of-type(1) {
  background-color: var(--black);
  height: 12em;
  width: 1em;
  z-index: 3;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, 0);
}

main section div:nth-of-type(2) {
  background-color: var(--black);
  width: 3em;
  height: 3em;
  border-radius: 100em 100em 0em 0em;
  z-index: 4;
  position: absolute;
  top: 11em;
  left: 50%;
  transform: translate(-50%, 0);
}

main section div:nth-of-type(3) {
  background-color: var(--grey);
  width: 6em;
  height: 6em;
  border-radius: 50%;
  z-index: 2;
  position: absolute;
  top: 13.5em;
  left: 50%;
  transform: translate(-50%, 0);
  display: none;
}

main section div:nth-of-type(4) {
  background-color: var(--grey);
  width: 6em;
  height: 6em;
  border-radius: 50%;
  z-index: 1;
  position: absolute;
  top: 13.5em;
  left: 50%;
  transform: translate(-50%, 0);
  z-index: 1;
}

/* ---↓--- Random artwork on the wall ---↓--- */

body > section {
  width: 15em;
  height: 20em;
  background-color: var(--grey);
  position: fixed;
  right: -3em;
  top: 8em;
  z-index: 1;
}

body > section span:nth-of-type(1) {
  display: block;
  width: 12em;
  height: 17em;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--black);
  opacity: 0.5;
  background-image: linear-gradient(135deg, #574f3e 25%, transparent 25%),
    linear-gradient(225deg, #574f3e 25%, transparent 25%),
    linear-gradient(45deg, #574f3e 25%, transparent 25%),
    linear-gradient(315deg, #574f3e 25%, #000000 25%);
  background-position: 31px 0, 31px 0, 0 0, 0 0;
  background-size: 31px 31px;
  background-repeat: repeat;
}

body > section span:nth-of-type(2) {
  width: 0.75em;
  height: 0.75em;
  background-color: var(--black);
  display: block;
  border-radius: 50%;
  position: absolute;
  top: 0.5em;
  left: 0.5em;
}

body > section span:nth-of-type(3) {
  width: 0.75em;
  height: 0.75em;
  background-color: var(--black);
  display: block;
  border-radius: 50%;
  position: absolute;
  bottom: 0.5em;
  left: 0.5em;
}