arthurdanjou.fr/components/header/header.scss

$cross-closed: black;
$cross-opened: red;
$menu-background: #111111;
$menu-color: white;
$hover-color: rgba(205, 205, 205, 0.3);

#header {
  z-index: 100;
  position: fixed;
  width: 100%;
  height: 10%;

  ul {
    list-style: none;
  }
  
  /*@media screen and (max-width: 700px) {
    height: 80px;
    width: 100%;
    background-color: rgba(54, 54, 54, 0.95);
  }*/

  .logo {
    z-index: 100;
    position: fixed;
    top: 5%;
    left: 5%;
    width: 64px;
    height: 64px;
    font-size: 24px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;

    @media screen and (max-width: 700px) {
      top: 1%;
    }

    .active {

    }
  }

  .cross {
    z-index: 100;
    position: fixed;
    top: 5%;
    right: 5%;
    width: 64px;
    height: 64px;
    font-size: 24px;
    font-weight: 700;
    line-height: 20px;
    cursor: pointer;

    @media screen and (max-width: 700px) {
      top: 1%;
    }

    &:active::before, &:active::after {
      transform: scale(0.85);
    }

    &:before, &:after {
      position: absolute;
      transition: transform .3s;
      display: block;
      content: "";
      height: 5px;
      width: 100%;
      background-color: $cross-closed;
    }

    &:before {
      top: 22px;
    }

    &:after {
      bottom: 22px;
      right: 0;
      width: 65%;
    }

    &.opened {
      &:before, &:after {
        width: 100%;
        background-color: $cross-opened;
      }

      &:before {
        top: 30px;
        transform: rotate(-45deg);
      }

      &:after {
        bottom: 30px;
        left: 0;
        transform: rotate(45deg);
        box-shadow: 0 0 0 4px $menu-background, 0 0 12px 8px $menu-background;
      }
    }
  }

  .menu {
    user-select: none;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 40%;
    right: 4.5%;
    height: 80px;
    width: 80px;
    transition: opacity .3s;
    padding: 25px;
    border-radius: 5px;

    a {
      padding: 2px 3px;
      box-shadow: inset 0 -10px 0 $hover-color;
      transition: box-shadow 0.2s ease-in-out;
      &:hover {
        box-shadow: inset 0 -100px 0 $hover-color;
      }
      &.active {
        box-shadow: inset 0 -100px 0 rgba(184, 184, 184, 0.8);
      }
    }

    .menu-top {
      margin-top: 40px;
      .pages-link {
        transition: transform .6s;
        transform: translateY(60px);
        .title {
          font-size: 22px;
          font-weight: 700;
        }
        li {
          font-size: 20px;
          padding: 7px 20px;
        }
      }

      .contact-link {
        margin-top: 40px;
        transition: transform .7s;
        transform: translateY(60px);

        .title {
          font-size: 20px;
          font-weight: 600;
        }
        li {
          font-size: 18px;
          padding: 7px 20px;
        }
      }
    }

    .menu-bottom {
      margin-top: 50px;
      transition: transform .8s;
      transform: translateY(60px);
      border-top: solid 1px $menu-color;

      ul {
        margin-top: 20px;
        display: flex;
        flex-direction: row;
        justify-content: space-evenly;

        li {
          padding: 3px 5px;
        }
      }
    }

    &.opened {
      z-index: 99;
      height: 500px;
      width: 350px;
      color: $menu-color;
      background-color: $menu-background;
      opacity: 1;
      visibility: visible;

      @media screen and (max-width: 700px) {
        border-radius: 0;
        top: 0;
        right: 0;
        width: 100%;
        height: 150vh;
      }

      .menu-top {
        .pages-link {
          transform: translateY(0);
        }

        .contact-link {
          transform: translateY(0);
        }
      }

      .menu-bottom {
        transform: translateY(0);
      }
    }
  }
}