header {
  width: 100%;
  height: fit-content;
  display: flex;
  justify-content: center;
  position: fixed;
  top: 0;
  z-index: 98;
}

.s-header-inner {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  padding: 1vw;
  background-color: #ffffff;
  /* opacity: 0.5; */
  transition: all 0.5s;
}

.s-header-inner:hover {
  opacity: 1;
  transition: all 0.5s;
}

.s-header-inner > img {
  width: 10vw;
}

.s-header-links {
  width: fit-content;
  font-size: 1vw;
  align-content: center;
}

.s-header-links > a {
  color: #333333;
  text-decoration-line: none;
  margin-right: 0.5em;
}

.s-header-links > a:hover {
  color: var(--theme1);
}

.s-header-inexperienced-link > .s-up-arrow {
  margin-left: 0.5em;
}

.s-header-inexperienced-link {
  font-size: 1vw;
  margin-left: 1em;
}

.s-header-buttons {
  display: flex;
  flex-direction: row;
  justify-content: right;
  margin-top: 0.8em;
}

.s-header-buttons a {
  width: auto;
  margin-right: 1em;
}

.s-header-buttons a p {
  line-height: 0.5em;
  font-size: max(0.8vw, 11px);
}

.s-header-buttons .s-button-blue {
  width: 15vw;
  min-width: 10em;
}

.s-header-buttons .s-button-orange {
  width: 13vw;
  min-width: 9em;
}

.s-header-hidden {
  display: none !important;
}

.s-header-inner img:first-of-type {
  display: initial;
  margin-left: 1.5em;
}

.s-header-inner img:last-of-type {
  display: none;
}

.s-header-sp {
  display: none;
}

/* smartphone */
@media screen and (max-width: 800px) {
  .s-header-hidden {
    display: flex !important;
  }

  header:has(.s-header-inner-top) {
    position: absolute;
    transition: all 0.5s;
  }

  .s-header-inner-top {
    height: 15vw !important;
    background-color: transparent !important;
    opacity: 1 !important;
    transition: all 0.5s;
    display: none;
  }

  .s-header-inner-top > img {
    filter: brightness(0) saturate(100%) invert(95%) sepia(1%) saturate(881%)
      hue-rotate(358deg) brightness(111%) contrast(100%);
  }

  .s-header-inner {
    width: 100%;
    height: 10vw;
    padding: 1.5vh 7vw 1vh 7vw;
  }

  .s-header-inner > img {
    width: 26vw;
  }

  .s-header-inner img:first-of-type {
    display: none;
  }

  .s-header-inner img:last-of-type {
    display: initial;
  }

  .s-header-buttons,
  .s-header-links {
    display: none;
  }

  .s-header-sp {
    height: 100%;
    display: flex;
    align-items: center;
  }

  input[type="checkbox"] {
    opacity: 0;
    visibility: hidden;
  }

  .hamburger {
    display: block;
    width: 2.5rem;
    height: auto;
    position: relative;
    left: -3vw;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
  }

  .hamburger span,
  .hamburger span::before,
  .hamburger span::after {
    position: absolute;
    display: block;
    content: "";
    height: 2px;
    background-color: #333333;
    transition: all 0.5s;
  }

  .hamburger span {
    width: 10vw;
    z-index: 99;
  }

  .hamburger span::before {
    width: 7.5vw;
    top: min(-2.5vw, -10px);
  }

  .hamburger span::after {
    width: 5vw;
    bottom: min(-2.5vw, -10px);
  }

  .s-header-inner-top > div > .s-header-sp > .hamburger span,
  .s-header-inner-top > div > .s-header-sp > .hamburger span::before,
  .s-header-inner-top > div > .s-header-sp > .hamburger span::after {
    background-color: #ffffff;
  }

  input[type="checkbox"]:checked + .hamburger span {
    background-color: #ffffff;
    background-color: transparent;
  }

  input[type="checkbox"]:checked + .hamburger span::before {
    background-color: #ffffff;
    width: 100%;
    top: 0;
    transform: rotate(45deg);
  }

  input[type="checkbox"]:checked + .hamburger span::after {
    background-color: #ffffff;
    width: 100%;
    bottom: 0;
    transform: rotate(-45deg);
  }

  .s-header-hamburger-nav {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0px;
    left: 0px;
    color: #fff;
    visibility: hidden;
    opacity: 0;
    transition: all 0.5s;
    background-color: #000000aa;
  }

  .s-header-hamburger-nav-inner {
    width: 80%;
    height: auto;
    padding: 3em 0;
    background-color: var(--theme1);
    border-radius: 15px;
    margin-left: auto;
    transition: all 0.5s;
  }

  .s-header-hamburger-nav-list {
    margin-top: 5vw;
  }

  .s-header-hamburger-nav-item a {
    color: #ffffff;
    text-decoration-line: none;
    display: block;
    font-size: 20px;
    padding: 1em 0 1em 15vw;
    text-transform: uppercase;
  }

  .s-header-hamburger-nav-item a:hover {
    color: #0f5474;
    background-color: #fff;
  }

  .s-header-hamburger-nav-item-buttons {
    margin-left: 13vw;
    margin-top: 2vh;
  }

  .s-header-hamburger-nav-item-buttons > .s-button {
    margin: 0 0 0 0;
  }

  input[type="checkbox"]:checked ~ .s-header-hamburger-nav {
    visibility: visible;
    opacity: 1;
    transition: all 0.5s;
  }
}