main.css

* {
  margin: 0;
  padding: 0;
  font-family: "Fira Sans", sans-serif;
}

h1 {
  font-size: 1.4rem;
  text-transform: uppercase;
  padding-bottom: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

p {
  font-size: 15px;
  line-height: 19px;
}

a {
  color: #1b61e4;
  text-decoration: none;
}

/* Notice container */
.chrome-container,
.edge-container {
  grid-area: alert-section;
  padding: 0.5rem 0;
  background-color: #ff794d;
  display: flex;
  height: 3rem;
  align-items: center;
}

/* Icon */
.fas {
  margin-left: 3rem;
}

/* Paragraph in the notice */
.notice-p {
  margin: auto;
}

/* Styles for Edge */
@supports (-ms-ime-align: auto) {
  .chrome-container {
    display: none;
  }
}

/* Styles for Chrome */
.edge-container:not(*:root) {
  display: none;
}

/* Styles for Firefox */
@supports (-moz-appearance: none) {
  .chrome-container {
    display: none;
  }
  .edge-container {
    display: none;
  }
}

.inner-container {
  /* Photo by Martin Adams on Unsplash */
  background: url(back_photo.jpg) no-repeat center center/cover;
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
}

.section-container {
  display: grid;
  align-content: space-evenly;
  grid-template-areas:
    "alert-section alert-section"
    "left-section right-section"
    "footer-section footer-section";
  width: 70%;
}

/* Application & Extension general style */
section {
  text-align: center;
  margin: 0.5rem 2rem;
  border-radius: 5px;
}

/* Application & Extension Container */
.left-section,
.right-section {
  display: grid;
  grid-template-rows: repeat(2, 1fr);
  height: 30rem;
}

.left-section {
  background-color: #fff;
  grid-area: left-section;
}

.right-section {
  /* Photo by Jess Bailey on Unsplash */
  background: url(pin.jpg) no-repeat center center/cover;
  grid-area: right-section;
  border-radius: 5px;
}

.left-section > .app {
  padding: 1rem;
  color: #000;
  position: relative;
  transition: all 1s;
  z-index: 5;
}

/* Gradient container */
.left-section > .app > .helper {
  background-image: linear-gradient(
    -125deg,
    #5271c4 0%,
    #b19fff 48%,
    #eca1fe 100%
  );
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: all 1s;
  border-radius: 5px 5px 0 0;
}

.left-section > .info {
  background: #fff;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  border-radius: 0 0 5px 5px;
}

/* Extension */
.right-section > .extension {
  padding: 1rem;
  color: #a202ca;
  transition: all 1s;
}

/* Styles to change gradient background on white one when hover */
.left-section:hover > .app > .helper {
  opacity: 0;
}

/* Styles to change font color when hover */
.right-section:hover > .extension {
  background-color: inherit;
  color: #000;
}

/* Footer */
.footer-section {
  text-align: center;
  grid-area: footer-section;
}