/* Reset & Common */
:root {
  --color-primary: #38a6cc;
  --color-primary-dark: #005f7f;
  --color-secondary: #9f71ff;
  --color-text-base: #000;
  --color-text-light: #535353;
  --color-text-on-primary: #fff;
  --color-text-subtle: #333;
  --color-background: #fff;
  --color-background-subtle: #f9f9f9;
  --color-border: #ddd;
  --color-border-light: rgba(255, 255, 255, 0.08);
  --color-hover: #d9d9d9;

  --font-family-base: 'Noto Sans JP', sans-serif;
  --max-width: 1440px;
}

/* Reset & Common */
body {
  opacity: 0;
  transition: opacity 0.1s ease;
}

body.is-loaded {
  opacity: 1;
}

body,
h1,
h2,
h3,
p,
ul,
li,
a,
button {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  color: var(--color-text-base);
}
a {
  text-decoration: none;
}
ul {
  list-style: none;
}
button {
  border: none;
  background: none;
  cursor: pointer;
}
.header-container,
main,
.footer-small-container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 20px;
}

/* Header */
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}
.logo img {
  width: 195px;
  height: 38px;
}

/* ヘッダー読み込み前のガタつき防止 */
#header-placeholder {
  min-height: 80px;
}

/* PCナビ */
.nav-pc ul {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-pc li {
  position: relative;
}
.nav-pc li a {
  font-size: 18px;
  position: relative;
  transition: color 0.3s;
}
.nav-pc li a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--color-primary);
  transition: width 0.3s;
}
.nav-pc li a:hover::after {
  width: 100%;
}
.nav-pc .submenu {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  position: absolute;
  top: 120%;
  left: 0;
  background: var(--color-background);
  padding: 12px 20px 20px;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(20px);
  visibility: hidden;
  transition: all 0.3s ease;
  white-space: nowrap;
  z-index: 100;
}
.nav-pc li:hover .submenu {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}
.nav-pc .submenu li a {
  display: block;
  padding: 8px 16px;
  font-size: 16px;
  color: var(--color-text-subtle);
  white-space: nowrap;
}
.nav-pc .contact-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: auto;
  height: 54px;
  line-height: 54px;
  text-align: center;
  border: 2px solid var(--color-primary);
  border-radius: 5px;
  padding: 0 16px;
}
.contact-button img.contact-icon {
  height: 24px;
  width: auto;
}

/* モバイルナビ */
.nav-mobile {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-background);
  transform: translateX(-100%);
  transition: 0.3s;
  overflow-y: auto;
  z-index: 100;
  padding-top: 80px;
}

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

/* ×ボタン */
.close-menu {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 36px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

/* li と ul 初期化 */
.nav-mobile ul,
.nav-mobile li {
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-mobile .has-submenu {
  border-bottom: 1px solid var(--color-border);
}

/* タイトル + プラスボタンを包む */
.menu-header {
  display: flex;
  align-items: center;
  position: relative;
  padding: 15px 24px;
  border-bottom: 1px solid var(--color-border);
}

/* タイトル */
.menu-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-base);
}

/* プラスボタン */
.submenu-toggle {
  position: absolute;
  left: 180px; /* タイトルからの距離（調整OK） */
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: var(--color-text-subtle);
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
  transition: color 0.3s;
}

/* プラスボタン内のアイコンを動かす */
.submenu-toggle span {
  display: inline-block;
  transition: transform 0.3s ease;
}

/* 開いたとき：＋ → ×（位置ズレなし） */
.has-submenu.open .submenu-toggle span {
  transform: rotate(45deg);
}

/* サブメニュー閉じた状態 */
.submenu-mobile {
  max-height: 0;
  overflow: hidden;
  padding-inline-start: 20px;
  background: var(--color-background-subtle);
  transition: max-height 0.3s ease;
}

/* サブメニュー開いた状態 */
.has-submenu.open .submenu-mobile {
  max-height: 500px;
}

/* サブメニューリンク */
.submenu-mobile li a {
  display: block;
  padding: 10px 0 10px 40px;
  font-size: 1rem;
  color: var(--color-text-subtle);
}
.submenu-mobile li a:hover {
  color: var(--color-primary);
}

/* Breadcrumb */
.breadcrumb {
  padding: 10px 20px;
  font-size: 1rem;
  margin-block-end: 10px;
  max-width: var(--max-width);
  border-top: 1.5px solid var(--color-text-base);
  border-bottom: 1px solid var(--color-text-base);
}
.breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
}
.breadcrumb li {
  color: var(--color-text-light);
}
.breadcrumb a {
  color: var(--color-primary);
  transition: color 0.3s;
}
.breadcrumb a:hover {
  color: var(--color-primary-dark);
}
.breadcrumb li:not(:last-child)::after {
  content: '>';
  margin-inline: 10px;
  color: #999;
}
.breadcrumb li:last-child {
  font-weight: 700;
  color: var(--color-text-base);
}

/* Footer */
.footer {
  color: var(--color-text-on-primary);
}
.footer-large {
  background-color: var(--color-primary);
  padding: 40px 0;
}
.footer-nav {
  display: flex;
  justify-content: center;
  gap: 80px;
  flex-wrap: wrap;
}
.footer-nav-item h3 {
  font-size: 1.5rem;
  margin-block-end: 20px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 16px;
}
.footer-nav-item ul li {
  margin-block-end: 10px;
}
.footer-nav-item a {
  color: var(--color-text-on-primary);
  font-size: 1.25rem;
  transition: color 0.3s;
}
.footer-nav-item a:hover {
  color: var(--color-hover);
}

.footer-small {
  background-color: var(--color-background);
  padding: 30px 0;
}
.footer-small-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.footer-small-container p,
.footer-small-container a {
  font-size: 1.25rem;
  color: var(--color-text-base);
  white-space: nowrap;
  transition: color 0.3s;
}
.footer-small-container a:hover {
  color: var(--color-primary);
}
.footer-small-container img {
  height: 50px;
}
.sitemap-button {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-primary);
  color: var(--color-text-on-primary) !important;
  border-radius: 5px;
  font-size: 1.125rem;
  line-height: 1.4;
}
.footer-small-container .sitemap-button:hover {
  color: var(--color-hover) !important;
}
.footer-logos img {
  margin-inline-end: 30px;
}
.footer-links a {
  margin-inline-end: 30px;
}
.footer-small-container .copyright {
  white-space: normal !important;
}

/* Back to top */
#back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  z-index: 1000;
  cursor: pointer;
  transition: opacity 0.3s;
  opacity: 0.5;
}
#back-to-top:hover {
  opacity: 1;
}
#back-to-top img {
  width: 100%;
  height: 100%;
  display: block;
}

/* Footer toggle - PC非表示 */
.footer-toggle {
  display: none;
  visibility: hidden;
}

/* Responsive */
@media (max-width: 1000px) {
  .nav-pc {
    display: none;
  }
  .hamburger-menu {
    display: block;
    width: 40px;
    height: 30px;
    position: relative;
    z-index: 20;
  }
  .hamburger-menu span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--color-text-base);
    position: absolute;
    transition: all 0.3s;
  }
  .hamburger-menu span:nth-child(1) {
    top: 4px;
  }
  .hamburger-menu span:nth-child(2) {
    top: 13px;
  }
  .hamburger-menu span:nth-child(3) {
    top: 22px;
  }
  .hamburger-menu.open span:nth-child(1) {
    top: 13px;
    transform: rotate(45deg);
  }
  .hamburger-menu.open span:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.open span:nth-child(3) {
    top: 13px;
    transform: rotate(-45deg);
  }
}
/* Responsive */
@media (max-width: 1450px) {
  .footer-small-container {
    flex-direction: column;
    gap: 15px;
  }
  .footer-nav {
    display: block;
    padding-inline: 20px;
  }
  .footer-nav-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border-light);
  }
  .footer-nav-item h3 {
    margin: 0;
    padding: 0 4px;
    justify-content: space-between;
  }

  .footer-toggle {
    display: inline-flex;
    visibility: visible;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--color-text-on-primary);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 18px;
    border: none;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: transform 0.28s;
  }

  .footer-nav-item .footer-submenu {
    display: none;
    margin-block-start: 8px;
    padding-inline-start: 10px;
  }
  .footer-nav-item.open .footer-submenu {
    display: block;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap; /* 長い時に折れる保険 */
  }

  .footer-links > a {
    min-width: 0;
  }
}

/* Fade-up animation */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* hover時：背景色を薄いグレーに */
.hamburger-menu.open:hover {
  background-color: rgba(0, 0, 0, 0.05);
  border-radius: 8px;
}