.site-header {
  display: grid;
  @include justify-content();
  padding: 0 20px;
  text-align: center;

  .site-header-wrapper {
    position: relative;
    overflow: hidden;
    background: var(--main-color);
    padding: 10px 25px 20px 25px;
    border-radius: 0 0 5px 5px;
    text-decoration: none;

    @include transition(background .2s ease);

    &:before { position: absolute; top: 0; left: -150%; content: ""; width: 50%; height: 100%;
      background: -webkit-linear-gradient(left, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, .3) 100%);
      background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, .3) 100%);
      @include skew(-45deg, 0);
    }
    &:hover {
      background: var(--main-color-hover);
      &:before {
        animation: headerShine .35s;
      }
    }
    .site-logo { display: block; margin: 0 0 10px;
      img {
        display: block;
      }
    }
    .site-subtitle {
      display: block;
      font-family: 'Bebas Neue', sans-serif;
      font-size: 11px;
      line-height: 14px;
      color: var(--grey-fc);
    }
    .site-title {
      display: block;
      font-family: 'Bebas Neue', sans-serif;
      font-size: 26px;
      line-height: 28px;
      color: var(--grey-fc);
    }
  }
}

.site-navigation {
  @include flexbox();
  @include justify-content();
  @include align-items();
  @include flex-flow(row wrap);
  gap: 10px 40px;
  max-width: 800px;
  margin: 30px auto 0;
  padding: 0 20px;
  text-align: center;

  a, span {
    position: relative;
    text-decoration: none;
    color: var(--grey-555);
    padding: 0 0 2px;
    @include transition(color .2s ease);
    cursor: pointer;

    &:before {
      position: absolute;
      opacity: 0;
      left: 0;
      bottom: 0;
      width: 0%;
      border-bottom: 2px solid var(--grey-222);

      @include transition(width .18s ease, opacity .18s ease); content: "";
    }

    &:hover, &.active { color: var(--grey-222);
      &:before {
        width: 100%; opacity: 1;
      }
    }
  }
}

@media screen and (max-width: 800px) {
  .site-header {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 9;
    background: var(--body-bg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, .1);

    .site-header-wrapper {
      @include flexbox();
      @include align-items();
      @include justify-content();
      @include flex-flow(row wrap);
      gap: 0 15px;
      border-radius: 0;
      padding: 20px;
      background: transparent;

      &:hover {
        background: transparent;
      }
      .site-logo,
      .site-subtitle {
        display: none;
      }
      .site-title {
        font-size: 32px;
        line-height: 36px;
        color: var(--main-color);
      }
    }
  }

  .site-navigation {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    @include justify-content(flex-start);
    @include flex-flow(column nowrap);
    gap: 20px 0;
    @include translate(0, -100%);
    @include transition(transform .25s ease-in-out);
    padding: 100px 20px 0;
    background: rgba(255, 255, 255, .9);
    z-index: 10;

    a, span {
      color: var(--grey-222);
      font-size: 30px;
      line-height: 40px;
    }
  }
}

.wrapper {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px 35px;
  border-bottom: 1px solid var(--grey-eee);

  &.long {
    max-width: 800px;
  }
}

.site-footer {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
  font-size: 14px;
  line-height: 22px;
  color: var(--grey-ccc);
  text-align: center;
}