/* =========================
   header.css (COMPONENT ONLY)
   - No :root
   - No global reset/body
   ========================= */

header,
.site-header {
  background-color: var(--color-bg);
  height: 80rem;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1rem solid var(--color-line);
  transition: height 0.3s ease;
}

.site-header .container,
header .container {
  height: 100 explained;
  height: 100%;
  transition: padding 0.3s ease;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32rem;
}

/* --- Logo Block (Logo + Company Name) --- */
.logo-block {
  display: flex;
  align-items: center;
  gap: 16rem;
  flex-shrink: 0;
}

/* --- Logo --- */
.logo {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 20rem;
  gap: 10rem;
  display: flex;
  align-items: center;
  color: var(--color-primary);
  flex-shrink: 0;
  transition:
    font-size 0.3s ease,
    gap 0.3s ease;
}

.logo-img {
  width: 33rem;
  height: 80rem;
  object-fit: contain;
  transition:
    width 0.3s ease,
    height 0.3s ease;
}

/* 会社名：nav-item-fixed と同じ文字スタイル */
.logo-company-name {
  font-size: 14rem;
  font-weight: 500;
  color: var(--color-primary);
  white-space: nowrap;
}

/* --- Header Right --- */
.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  height: 100%;
}

/* --- Navigation (PC Base Styles) --- */
.header-nav {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16rem; /* Space between List, Separator, Lang */
}

#nav-list {
  display: flex;
  align-items: center;
  height: 100%;
  font-size: 14rem;
  font-weight: 500;
  position: relative;
  gap: 16rem;
}

#nav-list li {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.nav-item-fixed {
  width: auto;
  transition: width 0.3s ease;
}

.nav-item-fixed a {
  color: var(--color-primary);
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  padding: 0 4rem;
}

.nav-item-fixed:not(.active):hover a {
  color: var(--color-hover);
}
.nav-item-fixed.active:hover a {
  color: var(--color-primary);
}

.nav-item-fixed a span {
  display: inline-block;
  pointer-events: none;
}

/* --- Marker Styles --- */
#nav-marker-active {
  position: absolute;
  bottom: -1rem;
  left: 0;
  height: 2rem;
  background-color: var(--color-primary);
  z-index: 9;
  transition:
    left 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
    width 0.3s ease;
}

#nav-marker-hover {
  position: absolute;
  bottom: -1rem;
  left: 0;
  height: 2rem;
  background-color: var(--color-hover);
  z-index: 10;
  pointer-events: none;
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  opacity: 0;
}

/* Separator */
.header-separator {
  color: var(--color-gray);
  font-size: 16rem;
  line-height: 1;
  z-index: 20;
  font-weight: 300;
  user-select: none;
  display: block;
  position: relative;
  top: -2rem;
}

/* Language Wrapper */
.lang-wrapper {
  position: relative;
  height: auto;
  display: flex;
  align-items: center;
  z-index: 1100;
}

.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-en);
  font-weight: 600;
  width: 56rem;
  height: 24rem;
  font-size: 11rem;
  border: 1rem solid transparent;
  flex-shrink: 0;
}

.lang-btn:hover,
.lang-wrapper:hover .lang-btn {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.lang-dropdown {
  position: absolute;
  top: 32rem;
  right: 0;
  background: var(--color-white);
  min-width: 110rem;
  box-shadow: 0 4rem 20rem rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10rem);
  transition:
    opacity 0.3s,
    visibility 0.3s,
    transform 0.3s;
}

.lang-wrapper:hover .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-dropdown li a {
  display: block;
  padding: 10rem 16rem;
  font-size: 13rem;
  color: var(--color-secondary);
  font-weight: 500;
  text-align: left;
}

.lang-dropdown li a:hover {
  background-color: var(--color-hover);
  color: var(--color-bg);
}

.lang-dropdown li a.selected {
  color: var(--color-primary);
  font-weight: 700;
  background-color: var(--color-bg);
}

/* --- Menu Toggle (PC Hidden) --- */
.menu-toggle {
  display: none;
}

/* --- Mobile Layout (<= 768px) --- */
@media (max-width: 768px) {
  header,
  .site-header {
    height: 64rem;
  }

  /* Elements Hidden on Mobile */
  .header-separator,
  #nav-marker-active,
  #nav-marker-hover {
    display: none !important;
  }

  .logo-img {
    width: auto;
    height: 70%;
  }

  /* --- Header Nav becomes Drawer --- */
  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg);
    padding-top: 64rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -5rem 0 15rem rgba(0, 0, 0, 0.1);
    z-index: 1001;
  }

  .header-nav.open {
    right: 0;
  }

  #nav-list {
    flex-direction: column;
    width: 100%;
    height: auto;
    gap: 0;
  }

  #nav-list li {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 1rem solid rgba(0, 0, 0, 0.05);
  }

  .nav-item-fixed {
    width: 100%;
  }

  .nav-item-fixed a {
    justify-content: flex-start;
    padding: 20rem 30rem;
    font-size: 16rem;
    height: auto;
  }

  .lang-wrapper {
    margin-top: auto;
    width: 100%;
    padding: 40rem 0;
    justify-content: center;
    border-top: 1rem solid rgba(0, 0, 0, 0.05);
  }

  .menu-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 64rem;
    height: 64rem;
    background-color: var(--color-primary);
    gap: 5rem;
    margin-right: -24rem; /* matches container mobile padding */
    z-index: 1002;
    transition: background-color 0.3s;
  }

  .menu-toggle span {
    display: block;
    width: 20rem;
    height: 2rem;
    background-color: var(--color-white);
    transition:
      transform 0.3s ease,
      opacity 0.3s ease;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: translateY(7rem) rotate(45deg);
  }
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-7rem) rotate(-45deg);
  }
}