/**
 * ヘッダースタイル
 */

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-header);
  transition: all var(--transition-fast);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  border-bottom-color: var(--color-gray-300);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-s) var(--padding-horizontal-mobile);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (min-width: 768px) {
  .header-container {
    padding: var(--spacing-s) var(--padding-horizontal-tablet);
  }
}

/* ロゴグループ */
.header-logo-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

/* Triviewロゴ */
.header-triview-logo {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.header-triview-logo:hover {
  opacity: 0.8;
}

.header-triview-logo-img {
  height: 56px;
  width: auto;
}

/* セパレーター */
.header-logo-separator {
  width: 1px;
  height: 56px;
  background-color: var(--color-gray-300);
}

/* DX Designロゴ */
.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  transition: opacity var(--transition-fast);
}

.header-logo:hover {
  opacity: 0.8;
}

.header-logo-svg {
  height: 70px;
  width: auto;
}

/* 親会社表記（ロゴ下部） */
.header-parent-company {
  display: flex;
  align-items: center;
  padding-left: 10px;
}

.header-parent-company-link {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.header-parent-company-link:hover {
  opacity: 0.7;
}

.header-parent-company-logo {
  height: 36px;
  width: auto;
  opacity: 0.85;
}

/* モバイル表示の調整 */
@media (max-width: 767px) {
  .header-logo-group {
    gap: 2px;
  }
  
  .header-logo-svg {
    height: 50px;
  }
  
  .header-parent-company {
    padding-left: 10px;
  }
  
  .header-parent-company-logo {
    height: 26px;
  }
  
  .header-triview-logo-img {
    height: 40px;
  }
  
  .header-logo-separator {
    height: 40px;
  }
  
  .header-logo-svg {
    height: 56px;
  }
}

/* 旧ロゴアイコン（後方互換性のため残す） */
.header-logo-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
}

/* ナビゲーション */
.header-nav {
  display: none;
}

@media (min-width: 768px) {
  .header-nav {
    display: flex;
    gap: var(--spacing-m);
    align-items: center;
  }
}

.header-nav-list {
  display: flex;
  gap: var(--spacing-m);
  align-items: center;
}

.header-nav-item {
  position: relative;
}

.header-nav-link {
  display: block;
  padding: var(--spacing-xs) var(--spacing-s);
  color: var(--color-gray-700);
  font-weight: var(--font-weight-regular);
  transition: color var(--transition-fast);
}

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

.header-nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.header-nav-link:hover::after {
  width: 80%;
}

/* CTAボタン */
.header-cta {
  display: none;
}

@media (min-width: 768px) {
  .header-cta {
    display: block;
    padding: 12px 24px;
  }
}

/* ハンバーガーメニュー（モバイル） */
.header-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  cursor: pointer;
  z-index: calc(var(--z-header) + 10);
}

@media (min-width: 768px) {
  .header-hamburger {
    display: none;
  }
}

.header-hamburger-line {
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.header-hamburger.active .header-hamburger-line:nth-child(1) {
  transform: translateY(9.5px) rotate(45deg);
}

.header-hamburger.active .header-hamburger-line:nth-child(2) {
  opacity: 0;
}

.header-hamburger.active .header-hamburger-line:nth-child(3) {
  transform: translateY(-9.5px) rotate(-45deg);
}

/* モバイルメニュー */
.header-mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background-color: var(--color-white);
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1);
  padding: var(--spacing-xl) var(--spacing-m);
  transition: right var(--transition-normal);
  z-index: calc(var(--z-header) + 5);
  overflow-y: auto;
}

.header-mobile-menu.active {
  right: 0;
}

.header-mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-s);
  margin-bottom: var(--spacing-l);
}

.header-mobile-nav-link {
  display: block;
  padding: var(--spacing-s);
  color: var(--color-gray-700);
  font-weight: var(--font-weight-regular);
  font-size: 18px;
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.header-mobile-nav-link:hover {
  color: var(--color-primary);
  padding-left: var(--spacing-m);
}

.header-mobile-cta {
  width: 100%;
}

/* オーバーレイ */
.header-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: calc(var(--z-header) + 1);
}

.header-overlay.active {
  opacity: 1;
  visibility: visible;
}