#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: var(--color-bg);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
  transition: box-shadow var(--transition-base);
}

#header.is-scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.1);
}

#header .container {
  position: relative;
}

#h_top {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: var(--header-height-sp);
  padding: 0 44px 0 var(--inner-padding-sp);
  position: relative;
}

/* SP ヘッダー予約ボタン */
.sp-header-icons {
  display: flex;
  align-items: stretch;
  position: absolute;
  top: 0;
  right: 44px;
  height: 100%;
}

.sp-header-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  height: 100%;
  padding: 0 14px;
  background: var(--color-accent-yellow);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
}

/* ハンバーガーメニュー */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 0;
  right: 0;
  width: 44px;
  height: var(--header-height-sp);
  background: var(--color-bg-dark);
  border: none;
  cursor: pointer;
  gap: 5px;
  padding: 0;
  z-index: calc(var(--z-header) + 10);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-bg);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* PC セカンダリナビ */
.pc-secondary-nav {
  display: none;
}

/* メインナビ */
.h_nav {
  display: none;
}

@media screen and (min-width: 768px) {
  #h_top {
    height: var(--header-height-pc);
    padding: 0 var(--inner-padding-pc);
    justify-content: space-between;
    gap: 24px;
  }

  .menu-toggle,
  .sp-header-icons {
    display: none;
  }

  .h_nav {
    display: block;
    flex: 1;
    min-width: 0;
  }

  .h_nav .nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 0;
  }

  .h_nav .nav > li {
    position: relative;
  }

  .h_nav .nav > li > a {
    display: block;
    padding: 8px 16px;
    font-size: clamp(11px, 0.9vw, 14px);
    transition: opacity var(--transition-base);
  }

  .h_nav .nav > li > a:hover {
    opacity: 0.6;
  }

  .pc-secondary-nav {
    display: flex;
    flex-shrink: 0;
    font-size: clamp(10px, 0.83vw, 13px);
    line-height: 1.4;
  }

  .pc-secondary-nav ul {
    display: flex;
  }

  .pc-secondary-nav li a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 90px;
    height: var(--header-height-pc);
    padding: 0 16px;
    text-align: center;
    transition: opacity var(--transition-base);
  }

  .pc-secondary-nav li a span {
    font-size: 0.85em;
    font-weight: 700;
  }

  .pc-secondary-nav .pc-booking a {
    background: var(--color-accent-yellow);
  }

  .pc-secondary-nav li a:hover {
    opacity: 0.8;
  }
}

/* SP モバイルナビ */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-bg);
  z-index: var(--z-mobile-nav);
  overflow-y: auto;
  padding-top: var(--header-height-sp);
  transform: translateX(100%);
  transition: transform 0.4s ease;
}

.mobile-nav.is-open {
  transform: translateX(0);
}

.mobile-nav .nav > li {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.mobile-nav .nav > li > a {
  display: block;
  padding: 16px var(--inner-padding-sp);
  font-size: 15px;
}

.mobile-nav .secondary-nav {
  padding: 20px var(--inner-padding-sp);
  background: var(--color-bg-gray);
}

.mobile-nav .contact-area {
  display: flex;
  margin-bottom: 16px;
}

.mobile-nav .contact-area div {
  flex: 1;
  width: 100%;
}

.mobile-nav .contact-area div a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 12px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  white-space: nowrap;
  background: var(--color-accent-yellow);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.mobile-nav .note {
  font-size: 10px;
  color: var(--color-text-light);
}

@media screen and (min-width: 768px) {
  .mobile-nav {
    display: none;
  }
}