/* 共通変数 */
:root {
  --header-height: 96px;
}

/* ヘッダー */
.header {
  background-color: var(--color-white);
  width: 100%;
  position: fixed;
  top: 0;
  z-index: 100;
}

.header__inner {
  max-width: var(--layout-section-width);
  margin: 0 auto;
  padding: 1.25rem var(--layout-padding-desktop);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.header__logo {
  display: block;
  width: 28%;
  max-width: 21rem;
  cursor: pointer;
}

.header__nav-wrapper {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin: 0;
}

.header__nav-item {
  position: relative;
}

.header__nav-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -1.25rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 1.2em;
  background-color: var(--color-text-primary);
}

.header__nav-link {
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-md);
  line-height: var(--line-height-snug);
  color: var(--color-text-secondary);
  text-decoration: none;
  position: relative;
}

.header__nav-link::after {
  position: absolute;
  left: 0;
  content: "";
  width: 100%;
  height: 1px;
  background: var(--color-primary-strong);
  bottom: -10px;
  transform: scale(0, 1);
  transform-origin: left top;
  transition: transform 0.3s ease;
}

.header__nav-link:hover::after {
  transform: scale(1, 1);
}

.header__nav-link:hover {
  color: var(--color-primary-strong);
}

.header__nav-trigger {
  display: inline-flex;
  align-items: center;
  appearance: none;
  -webkit-appearance: none;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  cursor: pointer;
}

.header__submenu {
  position: absolute;
  top: 100%;
  left: 0;
  transform: translateY(6px);
  min-width: 19.5rem;
  margin: 0;
  padding: 0.4rem;
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-header-gradient-end) 100%);
  border: 1px solid rgb(7 111 179 / 18%);
  border-radius: 0.85rem;
  box-shadow: var(--shadow-sm);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    visibility 0.2s ease;
  z-index: 120;
}

.header__submenu::before {
  content: "";
  position: absolute;
  top: -0.45rem;
  left: 1.1rem;
  width: 0.9rem;
  height: 0.9rem;
  background: var(--color-white);
  border-top: 1px solid rgb(7 111 179 / 18%);
  border-left: 1px solid rgb(7 111 179 / 18%);
  transform: rotate(45deg);
}

.header__submenu-link {
  position: relative;
  display: block;
  padding: 0.7rem 0.95rem 0.7rem 1.25rem;
  border-radius: 0.55rem;
  font-size: var(--font-size-md-alt);
  font-weight: 500;
  line-height: var(--line-height-snug);
  letter-spacing: 0.01em;
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.header__submenu-link::before {
  content: "";
  position: absolute;
  left: 0.6rem;
  top: 50%;
  width: 0.18rem;
  height: 58%;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-strong);
  transform: translateY(-50%) scaleY(0.3);
  opacity: 0;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease;
}

.header__submenu-link:hover,
.header__submenu-link:focus-visible {
  color: var(--color-primary-strong);
  background-color: var(--color-header-surface-soft);
  transform: translateX(2px);
}

.header__submenu-link:hover::before,
.header__submenu-link:focus-visible::before {
  transform: translateY(-50%) scaleY(1);
  opacity: 1;
}

.header__nav-item--has-submenu:hover .header__submenu,
.header__nav-item--has-submenu:focus-within .header__submenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 2rem;
  min-width: 8.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-black);
  color: var(--color-white);
  font-weight: 600;
  font-size: var(--font-size-md);
  text-decoration: none;
  line-height: var(--line-height-tight);
  white-space: nowrap;
  background-color: var(--color-black);
  transition:
    color 0.3s ease,
    background-color 0.3s ease,
    box-shadow 0.3s ease;
}

.header__cta:hover {
  background-color: var(--color-white);
  color: var(--color-black);
}

.header__contact-menu {
  position: relative;
}

.header__cta-trigger {
  cursor: pointer;
  font-family: inherit;
}

.header__cta--mobile-only {
  display: none;
}

.header__submenu--contact {
  left: auto;
  right: 0;
  min-width: 24.5rem;
}

.header__submenu--contact::before {
  left: auto;
  right: 1.1rem;
}

/* ヘッダー トップは背景を透明に設定 */
.header--top {
  background-color: transparent;
  position: fixed;
  transition:
    background-color 0.25s ease,
    box-shadow 0.25s ease;
}

.header--top:hover {
  background-color: var(--color-white);
}

.header--top:hover .header__nav-link--top {
  color: var(--color-text-primary);
}

.header--top:hover .header__nav-link--top:hover {
  color: var(--color-primary-strong);
}

.header--top:hover .header__nav-link--top {
  color: var(--color-black);
}

.header--top:hover .header__nav-item--top:not(:last-child)::after {
  background-color: var(--color-black);
}

.header__nav-item--top:not(:last-child)::after {
  background-color: var(--color-white);
}

.header__nav-link--top {
  color: var(--color-white);
}

/* 300px超えたら白背景、colorをブラックに変更 */
.header--top.is-solid {
  background-color: var(--color-white);
}
.header--top.is-solid .header__nav-link--top {
  color: var(--color-text-secondary);
}

.header--top.is-solid .header__nav-item--top:not(:last-child)::after {
  background-color: var(--color-text-primary);
}

/* ハンバーガーメニュー */
.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 1.75rem;
  height: 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.header__toggle-bar {
  display: block;
  height: 3px;
  background-color: var(--color-text-secondary);
  border-radius: 2px;
  transition:
    transform 0.3s ease,
    opacity 0.3s ease;
}

.header__toggle.is-active .header__toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__toggle.is-active .header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.header__toggle.is-active .header__toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ヘッダー1024px以下 */
@media (max-width: 1024px) {
  .header__inner {
    padding: 1.25rem var(--layout-padding-mobile);
  }

  .header__logo {
    width: 60%;
    max-width: 400px;
  }

  .header__nav-wrapper {
    position: fixed;
    top: var(--header-height, 96px);
    right: 0;
    left: 0;
    height: calc(100vh - var(--header-height, 96px));
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem 1.25rem 2rem;
    background: var(--color-white);
    width: 100%;
    max-width: none;
    text-align: left;
    opacity: 0;
    transform: translateX(100%);
    transition: none;
    pointer-events: none;
    box-shadow: none;
    z-index: 90;
    visibility: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .header__nav-wrapper.is-ready {
    transition:
      opacity 0.35s ease,
      transform 0.35s ease;
  }

  .header__nav-wrapper.is-active {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
    visibility: visible;
  }

  .header__nav-wrapper.is-leaving {
    opacity: 0;
    transform: translateX(100%);
    visibility: visible; /* 閉じるアニメ中は表示を維持 */
  }

  .header__nav {
    flex-direction: column;
    gap: 0.75rem;
    padding: 0;
  }

  .header__nav-item {
    margin: 0;
  }

  .header__nav-item::after {
    display: none;
  }

  .header__toggle {
    display: flex;
  }

  .header__submenu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    min-width: auto;
    margin-top: 0.45rem;
    box-shadow: none;
    border-radius: 0.6rem;
    background: var(--color-header-surface);
  }

  .header__submenu::before {
    display: none;
  }

  .header__submenu-link {
    white-space: normal;
  }

  /* 全ページ共通: お問い合わせを事業内容と同じ見え方に揃える */
  .header__contact-menu .header__cta-trigger {
    display: inline-flex;
    width: auto;
    min-width: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    font-weight: 400;
    line-height: var(--line-height-snug);
    justify-content: flex-start;
  }

  .header__contact-menu .header__submenu--contact {
    display: block;
  }

  .header__contact-menu .header__cta--mobile-only {
    display: none;
  }

  .header__cta {
    width: 100%;
    padding: 0.75rem 1.25rem;
    box-shadow: none;
  }
}