/**
 * Irie Design (アイリィデザイン) - Header & Navigation
 * Design System v1.0
 * 黒一段ヘッダーデザイン
 */

/* ========================================
 * Header Base - 黒一段統合デザイン
 * ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-gray-800, #1f2937);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}

.site-header--scrolled {
  box-shadow: var(--shadow-md);
}

/* トップバー（電話番号・営業時間など）- ヘッダー内に統合 */
.header-topbar {
  background: transparent;
  color: var(--color-white);
  font-size: var(--font-size-xs);
  padding: var(--spacing-1) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.header-topbar__contact {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.header-topbar__phone {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  color: var(--color-white);
  text-decoration: none;
}

.header-topbar__phone:hover {
  color: var(--color-secondary);
  text-decoration: none;
}

.header-topbar__hours {
  color: var(--color-gray-400);
}

.header-topbar__links {
  display: flex;
  gap: var(--spacing-4);
}

.header-topbar__link {
  color: var(--color-gray-300);
  text-decoration: none;
}

.header-topbar__link:hover {
  color: var(--color-white);
  text-decoration: none;
}

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

/* ========================================
 * Main Header - 黒背景
 * ======================================== */
.header-main {
  padding: var(--spacing-2) 0;
}

.header-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-6);
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* ロゴ（テキストベース・元のデザイン準拠） */
.header-logo {
  flex-shrink: 0;
}

.header-logo__link {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-2);
  text-decoration: none;
}

.header-logo__text {
  font-size: 26px;
  font-weight: 300;
  color: var(--color-white);
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
}

.header-logo__bold {
  font-weight: 700;
  font-style: normal;
}

.header-logo__tagline {
  font-size: 10px;
  color: var(--color-gray-400);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .header-logo__text {
    font-size: 20px;
  }

  .header-logo__tagline {
    display: none;
  }
}

/* 検索ボックス - 黒背景用 */
.header-search {
  flex: 1;
  max-width: 400px;
}

.header-search__form {
  display: flex;
  position: relative;
}

.header-search__input {
  width: 100%;
  height: 38px;
  padding: 0 var(--spacing-4);
  padding-right: 48px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.header-search__input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.15);
}

.header-search__input::placeholder {
  color: var(--color-gray-400);
}

.header-search__button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.header-search__button:hover {
  background: var(--color-primary-dark);
}

@media (max-width: 1024px) {
  .header-search {
    display: none;
  }
}

/* ヘッダーアクション - 白アイコン */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.header-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-1);
  color: var(--color-gray-300);
  text-decoration: none;
  font-size: var(--font-size-xs);
  transition: color var(--transition-fast);
}

.header-action:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.header-action__icon {
  width: 24px;
  height: 24px;
}

.header-action__badge {
  position: relative;
}

.header-action__count {
  position: absolute;
  top: -8px;
  right: -8px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background: var(--color-danger);
  color: var(--color-white);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  line-height: 18px;
  text-align: center;
  border-radius: var(--radius-full);
}

@media (max-width: 768px) {
  .header-action span {
    display: none;
  }
}

/* ハンバーガーメニュー - 白線 */
.header-hamburger {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.header-hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  margin: 5px 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.header-hamburger--open .header-hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header-hamburger--open .header-hamburger__line:nth-child(2) {
  opacity: 0;
}

.header-hamburger--open .header-hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 1024px) {
  .header-hamburger {
    display: block;
  }
}

/* ========================================
 * Main Navigation - 黒背景統合
 * ======================================== */
.main-nav {
  background: transparent;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.main-nav__inner {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-nav__item {
  position: relative;
}

.main-nav__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-3) var(--spacing-3);
  color: var(--color-gray-200);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav__link:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.main-nav__link--active {
  color: var(--color-primary);
  position: relative;
}

.main-nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-4);
  right: var(--spacing-4);
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full) var(--radius-full) 0 0;
}

.main-nav__icon {
  width: 16px;
  height: 16px;
  color: var(--color-gray-400);
  transition: transform var(--transition-fast);
}

.main-nav__item:hover .main-nav__icon {
  transform: rotate(180deg);
  color: var(--color-white);
}

/* ドロップダウンメニュー */
.main-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--color-white);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-normal),
              visibility var(--transition-normal),
              transform var(--transition-normal);
  z-index: var(--z-dropdown);
}

.main-nav__item:hover .main-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav__dropdown-list {
  margin: 0;
  padding: var(--spacing-2) 0;
  list-style: none;
}

.main-nav__dropdown-item {
  margin: 0;
}

.main-nav__dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-5);
  color: var(--color-gray-700);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.main-nav__dropdown-link:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
  text-decoration: none;
}

.main-nav__dropdown-icon {
  width: 20px;
  height: 20px;
  color: var(--color-gray-400);
}

.main-nav__dropdown-link:hover .main-nav__dropdown-icon {
  color: var(--color-primary);
}

/* メガメニュー */
.main-nav__mega {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  width: 100%;
  max-width: var(--container-lg);
  background: var(--color-white);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal),
              visibility var(--transition-normal),
              transform var(--transition-normal);
  z-index: var(--z-dropdown);
}

.main-nav__item:hover .main-nav__mega {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.main-nav__mega-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-6);
  padding: var(--spacing-6);
}

.main-nav__mega-column {
  min-width: 0;
}

.main-nav__mega-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-3);
  padding-bottom: var(--spacing-2);
  border-bottom: 2px solid var(--color-primary);
}

.main-nav__mega-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-nav__mega-link {
  display: block;
  padding: var(--spacing-2) 0;
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.main-nav__mega-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* CTA in Nav */
.main-nav__cta {
  margin-left: auto;
  padding: var(--spacing-2) 0;
}

@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }
}

/* ========================================
 * Mobile Navigation
 * ======================================== */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background: var(--color-white);
  box-shadow: var(--shadow-2xl);
  z-index: var(--z-modal);
  transition: right var(--transition-slow) var(--ease-out);
  overflow-y: auto;
}

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

.mobile-nav__overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  z-index: calc(var(--z-modal) - 1);
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-nav--open + .mobile-nav__overlay {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav__close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-gray-600);
}

.mobile-nav__close:hover {
  color: var(--color-gray-800);
}

.mobile-nav__search {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mobile-nav__item {
  border-bottom: 1px solid var(--color-gray-100);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4);
  color: var(--color-gray-700);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

.mobile-nav__link:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
  text-decoration: none;
}

.mobile-nav__submenu {
  display: none;
  background: var(--color-gray-50);
  padding: var(--spacing-2) 0;
}

.mobile-nav__item--open .mobile-nav__submenu {
  display: block;
}

.mobile-nav__sublink {
  display: block;
  padding: var(--spacing-3) var(--spacing-6);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  text-decoration: none;
}

.mobile-nav__sublink:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.mobile-nav__footer {
  padding: var(--spacing-4);
  border-top: 1px solid var(--color-gray-200);
  margin-top: auto;
}

.mobile-nav__contact {
  text-align: center;
  margin-bottom: var(--spacing-4);
}

.mobile-nav__phone {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.mobile-nav__hours {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}