/* 基本設定と変数 */
:root {
  --primary-color: #007bff;
  --primary-hover-color: #0056b3;
  --text-color: #333;
  --header-height: 80px;
  --header-height-scrolled: 60px;
}

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0 0 80px 0; /* モバイルCTAバーのスペース */
  color: var(--text-color);
  font-size: 15px; /* 基本のフォントサイズを少し小さくする */
  background-color: #fff;
}

/* キーボード操作用のフォーカススタイル */
:focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.section {
  margin-bottom: 40px;
}

/* ヘッダー */
.site-header {
  background-color: #f8f9fa;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all 0.3s ease;
  height: var(--header-height);
  border-bottom: 1px solid #e9ecef;
}

.site-header.scrolled {
  height: var(--header-height-scrolled);
  background-color: rgba(248, 249, 250, 0.95);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo-link {
  flex-shrink: 0;
}

.site-logo {
  height: 50px;
  width: auto;
  transition: transform 0.3s ease;
}

.site-logo-link:hover .site-logo {
  transform: scale(1.05);
}

/* グローバルナビゲーション */
.global-nav {
  flex-grow: 1;
  display: flex;
  justify-content: center;
}

.global-nav ul {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 24px;
}

.megamenu-wrapper {
  display: flex;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: bold;
  position: relative;
  padding: 5px 0;
  transition: color 0.3s ease, transform 0.3s ease;
  font-size: 16px;
}

.megamenu-trigger {
  background: none;
  border: none;
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
}

.nav-link:hover, .megamenu-trigger:hover {
  color: var(--primary-color);
}

.megamenu-trigger {
  font-size: 12px; /* アイコンサイズ調整 */
  padding: 5px;
  margin-left: 4px;
  line-height: 1;
}

.nav-link:not(.active):hover {
  transform: translateY(-2px);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--primary-color);
}

/* メガメニュー */
.has-megamenu {
  position: relative;
}
.megamenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px); /* 少し下に表示 */
  background-color: #fff;
  box-shadow: 0 8px 16px rgba(0,0,0,0.15);
  border-radius: 8px;
  padding: 20px;
  z-index: 110;
  width: 500px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}
.megamenu[hidden] {
  display: block; /* transitionを効かせるため */
}
.megamenu.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ホバーでメガメニューを表示 */
.has-megamenu:hover .megamenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.megamenu-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}
.megamenu-item {
  display: flex;
  flex-direction: column;
  padding: 10px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-color);
  transition: background-color 0.2s ease;
}
.megamenu-item:hover {
  background-color: #f1f1f1;
}
.megamenu-item strong {
  font-size: 15px;
  margin-bottom: 4px;
}
.megamenu-item span {
  font-size: 13px;
  color: #6c757d;
  line-height: 1.4;
}

/* ヘッダーCTA */
.header-cta {
  display: flex;
  align-items: center;
  gap: 20px;
}
.header-contact-link {
  font-weight: bold;
  text-decoration: none;
  color: var(--text-color);
  transition: color 0.3s ease;
}
.header-contact-link:hover {
  color: var(--primary-color);
}

/* モバイルメニューボタン */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 10px;
  z-index: 120;
}
.mobile-menu-btn .icon-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-color);
  transition: all 0.3s ease;
}
.mobile-menu-btn .icon-bar + .icon-bar {
  margin-top: 5px;
}
.mobile-menu-btn.is-active .icon-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.is-active .icon-bar:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.is-active .icon-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 共通セクション */
.cta-section {
  background-color: #e9ecef;
  padding: 30px 0;
  text-align: center;
  margin-bottom: 40px;
}
.page-header {
  background-color: #e9ecef;
  padding: 30px 0;
  text-align: center;
  margin-bottom: 40px;
}

/* カードグリッド */
.car-grid, .stock-grid, .sold-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.car-card {
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.car-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.car-card img {
  width: 100%;
  height: 160px; /* 高さを大きくする */
  object-fit: contain; /* 画像全体がコンテナに収まるように表示する */
}
.car-info {
  padding: 10px 15px; /* 上下の余白を少し減らす */
}
.car-info h3 {
  margin-top: 0; /* h3の上の余白をなくす */
  margin-bottom: 10px;
}
.car-meta {
  font-size: 0.85rem;
  color: #6c757d;
  margin-bottom: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 0 10px;
}
.car-price {
  font-size: 1.2rem;
  font-weight: bold;
  color: #dc3545;
  margin-bottom: 15px;
  text-align: right;
}
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}
.btn-primary:hover {
  background-color: var(--primary-hover-color);
  border-color: var(--primary-hover-color);
}
.btn-secondary {
  background-color: #6c757d;
  color: white;
  border-color: #6c757d;
}
.btn-secondary:hover {
  background-color: #5a6268;
  border-color: #5a6268;
}
footer {
  background-color: #343a40;
  color: white;
  padding: 30px 0;
  text-align: center;
  position: relative; /* z-indexを有効にするため */
  z-index: 1; /* ボタン(98)よりは下、通常コンテンツよりは上 */
}

/* フローティングボタン */
.back-to-top-btn {
  position: fixed;
  bottom: 90px; /* モバイルCTAバーを考慮 */
  right: 30px;
  width: 45px;
  height: 45px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  z-index: 98; /* 他のフローティングボタンよりは下 */
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  border: none;
  cursor: pointer;
}
.back-to-top-btn:hover {
  background-color: var(--primary-hover-color);
}
.back-to-top-btn.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* モバイル用フッター固定CTA */
.mobile-cta-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: #f8f9fa;
  box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
  z-index: 99;
}
.mobile-cta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  text-decoration: none;
  color: var(--text-color);
  font-size: 12px;
  gap: 2px;
}
.mobile-cta-item:hover {
  background-color: #e9ecef;
}
.mobile-cta-item svg {
  width: 22px;
  height: 22px;
}

/* レスポンシブ */
@media (max-width: 768px) {
  body {
    padding-top: var(--header-height-scrolled);
    padding-bottom: 60px; /* モバイルCTAバーの高さ */
  }
  .site-header {
    height: var(--header-height-scrolled);
  }
  .global-nav {
    position: static;
  }
  .global-nav ul {
    position: fixed;
    top: var(--header-height-scrolled);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height-scrolled));
    background-color: #f8f9fa;
    flex-direction: column;
    padding: 20px 0;
    gap: 0;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
  }
  .global-nav ul.show {
    transform: translateX(0);
  }
  .mobile-menu-btn {
    display: block;
  }
  .header-cta {
    display: none;
  }
  .car-grid, .stock-grid, .sold-grid {
    grid-template-columns: 1fr;
  }
  .mobile-cta-bar {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }
  .back-to-top-btn {
    bottom: 75px; /* CTAバーの上 */
  }
}