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

html {
  scroll-behavior: smooth;
  font-size: 10px;
}

img {
  max-width: 100%;
}

:root {
  /* color */
  --bgclr: white;
  --text-clr: #1d1759;
  --btn-clr: #9cfff9;

  /* font */
  --ff: "Poppins", sans-serif;

  --bezier: cubic-bezier(0.3, -0.01, 0.49, 1);
}

body {
  font-family: var(--ff);
  line-height: 1.6;
  background-color: var(--bglr);
  color: var(--text-clr);
  margin: 0;
}

.icon::before,
.icon::after {
  display: inline-block;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 90%;
  margin: 0 auto;
}

header {
  background-color: var(--text-clr);
  margin-bottom: 4em;
  padding: 1em 5%;
}

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

.logo-container {
  max-width: 35px;
}

.logo {
  width: 100%;
}

.nav {
  position: fixed;
  background-color: var(--btn-clr);
  color: var(--text-clr);
  top: 0;
  bottom: 50em;
  left: 15em;
  right: 0;
  z-index: 100;

  transform: translateX(100%);
  transition: transform 250ms cubic-bezier(0.5, 0, 0.5, 1);
}

@media (min-width: 400px) {
  .nav {
    top: 0;
    bottom: 50em;
    left: 17em;
    right: 0;
  }
}

@media (min-width: 500px) {
  .nav {
    top: 0;
    bottom: 50em;
    left: 30em;
    right: 0;
  }
}

@media (min-width: 700px) {
  .nav {
    top: 0;
    bottom: 50em;
    left: 45em;
    right: 0;
  }
}

@media (min-width: 800px) {
  .nav {
    top: 0;
    bottom: 60em;
    left: 30em;
    right: 0;
  }

  html {
    font-size: 12px;
  }
}

.desktop-nav {
  display: none;
}

.nav-list {
  height: 100%;
  margin-top: 1em;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  text-transform: capitalize;
  color: inherit;
  font-size: 1.7rem;
  cursor: pointer;
}

.nav-link:hover,
.nav-link:focus {
  color: green;
}

.nav-toggle {
  padding: 0.5em;
  background: transparent;
  border: 0;
  cursor: pointer;
  position: absolute;
  right: 1em;
  top: 1.8em;
  z-index: 1000;
}

.nav-open .nav {
  transform: translateX(0);
}

.nav-open .nav-toggle {
  position: fixed;
}

.nav-open .hamburger {
  background-color: var(--text-clr);
  transform: rotate(0.625turn);
  transition: transform 250ms ease-in-out;
}

.nav-open .hamburger::before {
  background-color: var(--text-clr);
  transform: rotate(90deg) translateX(-6px);
  transition: transform 250ms ease-in-out;
}

.nav-open .hamburger::after {
  opacity: 0;
}

.hamburger {
  display: block;
  position: relative;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  background: var(--btn-clr);
  width: 3em;
  height: 3px;
  border-radius: 1em;
  transition: transform 250ms ease-in-out;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
}

.hamburger::before {
  top: 7px;
}
.hamburger::after {
  bottom: 7px;
}

main {
  width: 100%;
}

.main-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

h1 {
  font-size: 3.7rem;
  font-weight: 800;
  text-align: center;
  margin: 0;
}

.button-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4em;
}

.registration-link {
  cursor: pointer;
}

.register {
  background-color: var(--text-clr);
  margin-top: 1em;
  padding: 1.2em 9em;
  font-size: 1.3rem;
  font-weight: 400;
  text-decoration: none;
  color: var(--btn-clr);
  cursor: pointer;
  border: none;
  border-radius: 60px;
  transition: background 200ms ease-in-out;
  animation: headShake 2s 2s;
}

.register:hover,
.register:focus {
  background-color: var(--btn-clr);
  color: var(--text-clr);
}

.text {
  font-size: 1.6rem;
  font-weight: 400;
  text-align: center;
}

.subtext {
  display: block;
  margin: 0;
}

.article-wrapper {
  margin-top: 6em;
}

article {
  width: 100%;
  margin-bottom: 1.8em;
  padding: 2em 1.5em;
  background-color: var(--btn-clr);
  border-radius: 20px;
}

.first-article {
  animation: fadeInLeft 700ms;
}

.second-article {
  animation: fadeIn 2s;
}

.third-article {
  animation: fadeInRightBig 2200ms;
}

.flex {
  display: flex;
  align-items: center;
  justify-content: center;
}

h2 {
  font-size: 1.6rem;
  font-weight: 600;
  text-transform: capitalize;
  text-align: center;
}

article p {
  font-size: 1.4rem;
  font-weight: 400;
  text-align: center;
}

.icons-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.3em;
  margin: 4em 0;
}

.fa-brands {
  font-size: 2.4rem;
  color: var(--text-clr);
  transition: transform 200ms ease-in-out;
}

.fa-brands:hover,
.fa-brands:focus {
  transform: scale(1.1);
}

.cover-pic__container {
  border-radius: 20px;
  background-image: url('../images/rename.jpg');
background-size: cover;
background-repeat: no-repeat;
  max-width: 900px;
  height: 340px;
  margin: 0 auto;
}



@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .desktop-nav {
    display: block;
  }

  .desktop-nav__list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5em;
    list-style: none;
    padding: 0;
  }

  .desktop-nav__link {
    color: var(--btn-clr);
    font-size: 1.5rem;
    text-decoration: none;
    text-transform: capitalize;
  }

  .desktop-nav__link:hover,
  .desktop-nav__link:focus {
    color: yellow;
  }

  section {
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    justify-content: center;
    align-items: center;
    gap: 8em;
    margin-bottom: 5em;
  }

  .grid {
    height: 100%;
  }

  h1 {
    margin-top: 0;
    width: 100%;
  }

  .cover-pic__container {
    width: 100%;
    height: 100%;
    box-shadow: 0.25em 0.25em 0.75em rgba(0, 0, 0, 0.25),
      0.125em 0.125em 0.25em rgba(0, 0, 0, 0.15);
  }

.button-wrapper {
margin-bottom: 0;
}

  .article-wrapper {
    display: flex;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5em;
  }

  article {
    max-height: 100%;
  }

  .first-article {
    animation: fadeInUp 700ms;
  }

  .second-article {
    animation: fadeIn 2s;
  }

  .third-article {
    animation: fadeInRightBig 2200ms;
  }
}