.pc-header {
  * {
    transition: var(--transition-default);
    user-select: none;
  }

  a {
    transition: 0.3s;

    &:hover {
      transition: 0.3s;
      opacity: 0.6;
    }
  }

  z-index: var(--z-index-header);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 9rem;
  @media (max-width: 768px) {
    height: 6rem;
  }

  .pc-header__area {
    width: 100%;
    margin: 0 auto;
    height: 9rem;
    position: relative;
    z-index: 2;
    @media (max-width: 768px) {
      height: 6rem;
    }
  }

  .pc-header__inner {
    max-width: 100%;
    display: flex;
    height: 90px;
    padding: 15px 48px;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;

    @media (max-width: 768px) {
      height: 6rem;
      max-width: 100%;
      padding: 1.6rem 1.6rem 1.6rem 1rem;
    }
  }

  .pc-header__logo {
    font-size: var(--font-lg);
    font-weight: var(--font-weight-bold);
    height: 72px;

    @media (max-width: 768px) {
      height: 48px;
    }
  }

  .pc-header__logo-link {
    text-decoration: none;
  }

  .pc-header__logo-image {
    height: 100%;
    width: auto;
  }

  .pc-header__nav {
    display: flex;
    gap: var(--space-md);
  }

  .pc-header__nav a {
    text-decoration: none;
    color: var(--color-foreground);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-sm);
    letter-spacing: var(--letter-spacing-widest);

    &:hover {
      opacity: var(--opacity-70);
    }
  }

  .pc-header__button-area {
    margin-left: auto;
    display: flex;
    gap: 42px;

    @media (max-width: 768px) {
      display: none;
    }
  }

  .pc-header__button-item {
    height: 24px;
    width: auto;
  }

  .pc-header__button-image {
    height: 100%;
    width: auto;
  }

  .pc-header__menu-button {
    height: 64px;
    width: 64px;
    border-radius: 9999px;
    border: 1px solid #333;
    position: relative;
    margin-left: 42px;
    transition: 0.3s;

    @media (max-width: 768px) {
      width: 32px;
      height: 32px;
    }

    &:hover {
      cursor: pointer;
      opacity: 0.8;
    }

    .pc-header__menu-bar {
      position: absolute;
      top: 50%;
      left: 50%;
      width: 24px;
      height: 2px;
      border-radius: 9999px;
      background-color: #333;
      transform: translate(-50%, -50%);
      transition: 0.3s;

      @media (max-width: 768px) {
        width: 12px;
        height: 1px;
        top: 12px;
      }

      &:nth-child(1) {
        top: 39px;

        @media (max-width: 768px) {
          top: 16px;
        }
      }

      &:nth-child(2) {
        top: 25px;

        @media (max-width: 768px) {
          top: 20px;
        }
      }
    }

    .pc-header__menu-bar:hover {
      .pc-header__menu-bar {
        background-color: var(--color-foreground);
      }
    }
  }
}

.sp-header {
  * {
    transition: var(--transition-default);
    user-select: none;
  }

  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 9rem;
  z-index: var(--z-index-header);

  @media (max-width: 1100px) {
    display: block;
  }

  .sp-header__area {
    width: 100%;
    margin: 0 auto;
    height: 100%;
    position: relative;
    z-index: var(--z-index-sp-menu);
  }

  .sp-header__inner {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .sp-header__menu-button.active .menu-icon {
    transform: rotate(90deg);
  }

  .sp-header__logo {
    height: 100%;
  }

  .sp-header__logo-image {
    font-size: var(--font-lg);
    font-weight: var(--font-weight-bold);
    height: 100%;
    width: auto;
    padding: var(--space-md);
  }

  .sp-header__menu-button {
    user-select: none;
    position: absolute;
    top: 0;
    right: 0;
    width: 6rem;
    height: 6rem;
    cursor: pointer;
    z-index: var(--z-index-header);

    .sp-header__menu-bar {
      user-select: none;
      position: absolute;
      top: 2.3rem;
      left: 1.5rem;
      display: block;
      width: 3rem;
      height: 1px;
      background-color: var(--color-foreground);
      position: relative;
      transition: 0.3s;

      &:nth-child(2) {
        width: 2.4rem;
        top: 3rem;
      }
    }

    &.active {
      .sp-header__menu-bar {
        &:nth-child(1) {
          transform: rotate(45deg);
          top: 2.9rem;
          width: 3rem;
          left: 1.9rem;
        }

        &:nth-child(2) {
          transform: rotate(-45deg);
          top: 2.8rem;
          width: 3rem;
          left: 1.8rem;
        }
      }
    }
  }
}

.header__background {
  &:before {
    content: "";
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    position: absolute;
    background: #fff;
    /* ぼかしも段階的に適用 */
    filter: blur(0px);
    -webkit-filter: blur(0px);
    z-index: 1;
  }

  &:after {
    content: "";
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    z-index: 1;
    position: absolute;
    background: radial-gradient(
        ellipse at top,
        rgba(255, 255, 255, 0.4) 0%,
        rgba(255, 255, 255, 0.2) 40%,
        rgba(255, 255, 255, 0.1) 70%,
        transparent 100%
      ),
      linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.6) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 100%
      );
    backdrop-filter: blur(12px) saturate(1.2) brightness(1.1);
    -webkit-backdrop-filter: blur(12px) saturate(1.2) brightness(1.1);
    /* ぼかしのマスクで段階的に弱くする */
    mask: linear-gradient(
      to bottom,
      black 0%,
      rgba(0, 0, 0, 0.9) 20%,
      rgba(0, 0, 0, 0.7) 40%,
      rgba(0, 0, 0, 0.4) 60%,
      rgba(0, 0, 0, 0.2) 75%,
      rgba(0, 0, 0, 0.1) 85%,
      transparent 95%
    );
    -webkit-mask: linear-gradient(
      to bottom,
      black 0%,
      rgba(0, 0, 0, 0.9) 20%,
      rgba(0, 0, 0, 0.7) 40%,
      rgba(0, 0, 0, 0.4) 60%,
      rgba(0, 0, 0, 0.2) 75%,
      rgba(0, 0, 0, 0.1) 85%,
      transparent 95%
    );
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  }
}

#nav-modal {
  transition: 0.3s ease-in-out;
  *,
  *&:after,
  *&:before {
    transition: 0.3s ease-in-out;
  }
  display: none;

  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

#nav-modal.active {
  z-index: 9999;
  opacity: 1;
  display: block;
}

.nav-modal__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
}

.sp-header__area {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}
.sp-header__scroll {
  height: calc(100dvh - 60px);
  overflow-y: auto;
}
.sp-header__logo {
}

.sp-header__logo img {
  max-width: 160px;
  height: auto;
  @media (max-width: 768px) {
    max-width: 120px;
  }
}

.close-button {
  position: relative;
  width: 62px;
  height: 62px;
  cursor: pointer;
  user-select: none;
  @media (max-width: 768px) {
    width: 32px;
    height: 32px;
  }
}

.close-button__line {
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: #000;
  transition: transform 0.3s ease;
}

.close-button__line:nth-child(1) {
  top: 50%;
  left: 0;
  transform: translateY(-50%) rotate(45deg);
}

.close-button__line:nth-child(2) {
  top: 50%;
  left: 0;
  transform: translateY(-50%) rotate(-45deg);
}

.close-button__line:nth-child(3) {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: #000;
  transform: translateY(-50%);
}

.sp-header__nav {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 600px;
  height: 100%;
  background-color: #fff;
  padding: 20px;
  box-shadow: -2px 0px 5px rgba(0, 0, 0, 0.1);

  @media (max-width: 768px) {
    width: 100%;
    max-width: 100%;
    padding: 0 20px;
  }
}

.sp-header__nav-list {
  margin-top: 32px;
  padding: 0 32px;

  @media (max-width: 768px) {
    padding: 0 12px;

    margin-top: 16px;
  }
}

.sp-header__nav-list a {
  display: block;
  padding: 16px 0;
  font-size: 18px;
  position: relative;

  &:after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    margin-top: auto;
    margin-bottom: auto;
    right: 10px;
    width: 10px;
    height: 10px;
    border-right: 2px solid #333;
    border-bottom: 2px solid #333;
    transition: transform 0.3s ease-in-out;
    transform: rotate(-45deg);
  }

  &:hover {
    color: var(--red, #c00000);

    &:after {
      right: 5px;
      border-right-color: var(--red, #c00000);
      border-bottom-color: var(--red, #c00000);
    }
  }

  @media (max-width: 768px) {
    font-size: 14px;
    padding: 14px 0;
  }
}

.sp-header__sns-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.sp-header__sns-list {
  display: flex;
  gap: 24px;
  margin-top: 16px;
}

.sp-header__sns-message {
  font-size: 18px;
  color: #333;
  margin-bottom: 8px;
  text-align: center;
}

.sp-header__sns-image {
  width: 32px;
  height: 32px;
  object-fit: contain;

  &:hover {
    opacity: 0.5;
  }

  @media (max-width: 768px) {
    width: 24px;
    height: 24px;
  }
}