website/src/styles/partials/_nav.scss

@use '../consts' as consts;


%burger-line {
  height: 0.15em;
  width: 100%;
  background-color: var(--c-white);
}

%burger-wing {
  content: "";
  position: absolute;
  transition: transform 100ms ease-in-out;
}

#p-nav-toggle:checked {
  ~ .p-nav__bar .p-nav__burger-icon {
    background-color: transparent;

    &::before {
      transform: translateY(0.8rem) rotateZ(45deg);
    }

    &::after {
      transform: translateY(-0.8rem) rotateZ(-45deg);
    }
  }

  ~ .p-nav__menu {
    display: block;

    @media (min-width: consts.$bp-md) {
      display: inline-flex;
    }
  }
}

.p-nav {
  background: var(--momiji);
  background-color: var(--c-primary);

  @media (min-width: consts.$bp-md) {
    display: flex;
    gap: 0.5em;
  }

  &__bar {
    display: flex;
    height: 4em;
  }

  &__logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    margin-right: auto;
    padding: 0.5em;
    color: white;
    text-decoration: none;
    font-family: Arial, Helvetica, sans-serif;

    &-icon {
      transition: transform 0.5s ease-in-out;

      &:hover {
        transform: scale(1) rotate(360deg);
      }
    }
  
    &-text {
      display: flex;
      flex-direction: column;
    }
  
    &-main {
      font-size: 2rem;
      line-height: 1em;
    }
  
    &-sub {
      align-self: flex-start;
      max-width: max-content;
      overflow: hidden;
      white-space: nowrap;
      font-size: 0.675rem;
      line-height: 1.2em;
      animation:
        typing 1.25s steps(20, end) forwards,
        blink-caret .75s step-end 4;
    }
  }

  &__menu {
    display: none;
    list-style-type: none;

    @media (min-width: consts.$bp-md) {
      display: flex;
      align-items: center;
      gap: 0.25em;
    }

    &-item {
      text-align: center;
    }

    &-link {
      display: block;
      padding: 0.2em 0.3em;
      font-size: 1.2rem;
      text-decoration: none;
      color: var(--c-white);
  
      @media (min-width: consts.$bp-md) {
        border-radius: 5px;
      }
  
      &:hover {
        background-color: hsla(0, 0%, 0%, 0.20);
      }
    }
  }

  &__burger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4em;
    padding: 1em;
    cursor: pointer;

    @media (min-width: consts.$bp-md) {
      display: none;
    }

    &-icon {
      position: relative;
      transition: background-color 100ms linear;
      @extend %burger-line;
      
      &::before {
        top: -0.8rem;
        @extend %burger-line;
        @extend %burger-wing;
      }
  
      &::after {
        top: 0.8rem;
        @extend %burger-line;
        @extend %burger-wing;
      }
    }
  }
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-right: 2px solid white; }
  50% { border-right: transparent; }
}