style.css

@import url("https://fonts.googleapis.com/css2?family=Lato:wght@100;300;400;700;900&display=swap");

:root {
  --main-color: rgba(31, 143, 255, 0.8);
  --background-color: rgb(252, 252, 252);
  --container-color: rgb(18, 18, 18);
  --button-color: rgb(245, 245, 245);
  --box-shadow-btn: 0 0.3rem rgba(255, 253, 253, 0.65);
  --loader-circle: #f3f3f3;
}

[data-theme="dark"] {
  --background-color: rgb(66, 66, 66);
  --container-color: rgb(18, 18, 18);
  --main-color: rgb(32, 33, 36);
  --box-shadow-btn: 0 0.3rem rgba(22, 21, 21, 0.3);
  --loader-circle: rgb(22, 21, 21);
  --loader-circle-small: rgba(31, 143, 255);
}

html {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;

  background-color: var(--background-color);
  background-image: url("data:image/svg+xml,%3Csvg width='70' height='70' viewBox='0 0 70 70' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23057ff7' fill-opacity='0.4' fill-rule='evenodd'%3E%3Cpath d='M0 0h35v35H0V0zm5 5h25v25H5V5zm5 5h15v15H10V10zm5 5h5v5h-5v-5zM40 5h25v25H40V5zm5 5h15v15H45V10zm5 5h5v5h-5v-5zM70 35H35v35h35V35zm-5 5H40v25h25V40zm-5 5H45v15h15V45zm-5 5h-5v5h5v-5zM30 40H5v25h25V40zm-5 5H10v15h15V45zm-5 5h-5v5h5v-5z'/%3E%3C/g%3E%3C/svg%3E");

  font-family: "Lato", sans-serif;
  font-weight: 400;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quote-container {
  width: auto;
  max-width: 900px;
  padding: 20px 30px;
  border-radius: 10px;
  background-color: var(--main-color);
  box-shadow: 0 10px 10px 10px rgba(0, 0, 0, 0.2);
}
.quote-text {
  font-size: 2rem;
  color: whitesmoke;
}

.long-quote {
  font-size: 1.6rem;
}

.fa-quote-left {
  font-size: 4rem;
}

.quote-author {
  margin-top: 15px;
  font-size: 2rem;
  font-weight: 400;
  font-style: italic;
  color: white;
  font-weight: 700;
}

.button-container {
  margin-top: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

button {
  cursor: pointer;
  font-size: 1.2rem;
  height: 2.5rem;
  border: none;
  outline: none;
  border-radius: 10px;
  color: var(--main-color);
  background-color: var(--button-color);
  padding: 0.5rem 1.8rem;
  box-shadow: var(--box-shadow-btn);
}

button:hover {
  filter: brightness(110%);
}

button:active {
  transform: translate(0, 0.3rem);
  box-shadow: 0 0.1rem rgba(255, 255, 255, 0.65);
}

.loader {
  border: 16px solid var(--loader-circle); /* Light grey */
  border-top: 16px solid var(--loader-circle-small);
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
}

/* Switch dark mode */

.switcher {
  width: 200px;
  height: 50px;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.theme-switch {
  display: inline-block;
  height: 34px;
  position: relative;
  width: 60px;
}
.theme-switch input {
  display: none;
}

.slider {
  position: absolute;
  transition: 0.4s;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  cursor: pointer;

  background: var(--button-color);
}

.slider::before {
  bottom: 4px;
  content: "";
  height: 26px;
  left: 4px;
  position: absolute;
  transition: 0.4s;
  width: 26px;
  background-color: var(--main-color);
}

input:checked + .slider::before {
  transform: translateX(26px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round::before {
  border-radius: 50%;
}

.fa-sun {
  font-size: 2rem;
  color: var(--button-color);
}
.fa-moon {
  font-size: 2rem;
  color: var(--button-color);
}

/* End of switch dark mode */

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Media querries */

@media screen and (max-width: 1000px) {
  .quote-container {
    margin: auto 10px;
  }

  .quote-text {
    font-size: 1.2rem;
  }
  .quote-author {
    font-size: 1.5rem;
  }
  .fa-sun {
    font-size: 1.5rem;
  }
  .fa-moon {
    font-size: 1.5rem;
  }

  button {
    height: 2rem;
    font-size: 1rem;
    padding: 0 1rem;
  }
}