<div class="mobile">
  <div class="header">
    <h1 class="header__logo">Logo</h1>
  </div>
  <div class="contents">
    <ul class="list">
      <li class="card">
        <div class="card__img"></div>
        <div class="card__field">
          <div class="card__text"></div>
          <div class="card__text"></div>
          <div class="card__text"></div>
        </div>
      </li>
      <li class="card">
        <div class="card__img"></div>
        <div class="card__field">
          <div class="card__text"></div>
          <div class="card__text"></div>
          <div class="card__text"></div>
        </div>
      </li>
      <li class="card">
        <div class="card__img"></div>
        <div class="card__field">
          <div class="card__text"></div>
          <div class="card__text"></div>
          <div class="card__text"></div>
        </div>
      </li>
    </ul>
  </div>
  <div class="menu js-menu">
    <span class="menu__line"></span>
    <span class="menu__line"></span>
    <span class="menu__line"></span>
  </div>
  <nav class="nav js-nav">
    <ul class="nav__list js-nav__list">
      <li class="nav__item"><a href="#" class="nav__link">link</a></li>
      <li class="nav__item"><a href="#" class="nav__link">link</a></li>
      <li class="nav__item"><a href="#" class="nav__link">link</a></li>
      <li class="nav__item"><a href="#" class="nav__link">link</a></li>
    </ul>
  </nav>
</div>

@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');

$bg-color: #eee;
$color-white: #fff;
$color-black: #222;
$color-purple-dark: #7f39fb;
$color-purple-light: #dbb2ff;

* {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  height: 100%;
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background-color: $bg-color;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile {
  width: 320px;
  height: 480px;
  background-color: $color-white;
  border-radius: 21px;
  box-shadow: 0px 4px 50px #bbb;
  position: relative;
  overflow: hidden;
}

.header {
  height: 50px;
  width: 100%;
  display: flex;
  align-items: center;
  padding: 0px 16px;
  background-color: $color-purple-dark;
  &__logo {
    font-size: 22px;
    color: $color-white;
    letter-spacing: 0.05em;
  }
}

.contents {
  display: block;
  padding: 16px;
  height: 430px;
}

.list {
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 100%;
  height: 100%;
}

.card {
  width: 100%;
  display: flex;
  padding: 16px;
  background-color: $color-purple-light;
  border-radius: 8px;
  &__img {
    width: 100px;
    height: 80px;
    background-color: $color-purple-dark;
    border-radius: 8px;
    margin-right: 16px;
  }
  &__field {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-around;
  }
  &__text {
    display: block;
    height: 10px;
    width: 100%;
    background-color: $color-purple-dark;
    border-radius: 13px;
  }
}

.menu {
  display: block;
  position: absolute;
  bottom: 16px;
  right: 16px;
  background-color: $color-black;
  height: 50px;
  width: 50px;
  border-radius: 50%;
  z-index: 20;
  box-shadow: 0px 3px 8px #333;
  cursor: pointer;
  &__line {
    display: block;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 4px;
    background-color: $color-white;
    border-radius: 13px;
    transition-duration: .4s;
    &:nth-child(1) {
      top: 14px;
    }
    &:nth-child(2) {
      top: 23px;
    }
    &:nth-child(3) {
      bottom: 14px;
    }
  }
  // hamburger menu transformation
  &.active {
    background-color: rgba(0, 0, 0, 0);
    box-shadow: none;
  }
  &.active .menu__line:nth-child(1) {
    transform: translate(-12px, 9px) rotate(-45deg);
  }
  &.active .menu__line:nth-child(2) {
    transition-duration: 0s;
    opacity: 0;
  }
  &.active .menu__line:nth-child(3) {
    transform: translate(-12px, -9px) rotate(45deg);
  }
}

.nav {
  display: block;
  position: absolute;
  bottom: 16px;
  right: 16px;
  background-color: $color-black;
  height: 50px;
  width: 50px;
  border-radius: 50%;
  z-index: 10;
  transition-duration: .4s; 
  &.open {
    background-color: rgba(0, 0, 0, 0.9);
    width: 320px;
    height: 480px;
    position: absolute;
    right: 0px;
    bottom: 0px;
    border-radius: 0;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  &__list {
    display: none;
    &.show {
      display: flex;
      flex-direction: column;
      list-style: none;
      margin: 0;
      padding: 0;
    }
  }
  &__item {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    width: 100%;
    opacity: 0;
    animation-name: fadein;
    animation-duration: 1s;
    animation-fill-mode: forwards;
    &:nth-child(1) {
      animation-delay: .2s;
    }
    &:nth-child(2) {
      animation-delay: .3s;
    }
    &:nth-child(3) {
      animation-delay: .4s;
    }
    &:nth-child(4) {
      animation-delay: .5s;
    }
    &:not(:last-child) {
      margin-bottom: 32px;
    }
  }
  &__link {
    font-size: 24px;
    letter-spacing: 0.1em;
    text-decoration: none;
    color: $color-white;
  }
}

@keyframes fadein {
  0% {
    opacity: 0;
    transform: translateY(24px);
  }
  100% {
    opacity: 1;
  }
}

$('.js-menu').on('click', () => {
  $('.js-menu').toggleClass('active');
  $('.js-nav').toggleClass('open');
  $('.js-nav__list').toggleClass('show');
});