/* ============================================
   HEADER.CSS
   グローバルヘッダー ＋ モバイルメニュー
   ============================================ */

/* --------------------------------------------
   1. Header Base
   -------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: transparent;
  transition:
    background var(--transition-base),
    box-shadow var(--transition-base),
    backdrop-filter var(--transition-base);
}

/* スクロール後のスタイル */
.header.is-scrolled {
  background: rgba(26, 58, 42, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06),
              var(--shadow-md);
}

/* ライトセクション上（白背景セクション通過時）*/
.header.is-light {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06),
              var(--shadow-sm);
}

/* --------------------------------------------
   2. Inner
   -------------------------------------------- */
.header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 72px;
  padding-inline: var(--space-8);
  max-width: var(--container-xl);
  margin-inline: auto;
}

/* --------------------------------------------
   3. Logo
   -------------------------------------------- */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo-mark {
  color: var(--color-accent);
  display: flex;
  align-items: center;
  transition: transform var(--transition-base);
}

.header__logo:hover .header__logo-mark {
  transform: rotate(45deg);
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.header__logo-name {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-inverse);
  line-height: 1;
  letter-spacing: 0.02em;
  transition: color var(--transition-base);
}

.header__logo-sub {
  font-size: 0.625rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: var(--tracking-wider);
  line-height: 1;
  text-transform: uppercase;
}

/* ライトモード時のロゴ色変更 */
.header.is-light .header__logo-name {
  color: var(--color-text-primary);
}

/* --------------------------------------------
   4. PC Navigation
   -------------------------------------------- */
.header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.header__nav-item {
  position: relative;
}

.header__nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
}

.header__nav-link:hover::after,
.header__nav-link.is-active::after {
  transform: translateX(-50%) scaleX(1);
}

.header__nav-link:hover {
  background: rgba(255,255,255,0.08);
}

.header.is-light .header__nav-link:hover {
  background: rgba(0,0,0,0.04);
}

.header__nav-num {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  color: var(--color-accent);
  line-height: 1;
}

.header__nav-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: rgba(255,255,255,0.8);
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.header__nav-link:hover .header__nav-label,
.header__nav-link.is-active .header__nav-label {
  color: var(--color-text-inverse);
}

/* ライトモード */
.header.is-light .header__nav-label {
  color: var(--color-text-secondary);
}

.header.is-light .header__nav-link:hover .header__nav-label,
.header.is-light .header__nav-link.is-active .header__nav-label {
  color: var(--color-text-primary);
}

/* アクティブ状態 */
.header__nav-link.is-active {
  background: rgba(200,146,42,0.1);
}

/* --------------------------------------------
   5. PC CTA
   -------------------------------------------- */
.header__cta {
  flex-shrink: 0;
}

/* --------------------------------------------
   6. Hamburger Button
   -------------------------------------------- */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast);
  flex-shrink: 0;
}

.header__hamburger:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.25);
}

.header.is-light .header__hamburger {
  background: rgba(0,0,0,0.05);
  border-color: rgba(0,0,0,0.1);
}

.header__hamburger-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-inverse);
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base),
    width var(--transition-base);
  transform-origin: center;
}

.header.is-light .header__hamburger-bar {
  background: var(--color-text-primary);
}

/* Open 状態 */
.header__hamburger.is-open .header__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger.is-open .header__hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__hamburger.is-open .header__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------
   7. Progress Bar
   -------------------------------------------- */
.header__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}

.header__progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(
    to right,
    var(--color-primary-light),
    var(--color-accent)
  );
  transition: width 100ms linear;
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

/* ============================================
   MOBILE MENU
   ============================================ */

/* --------------------------------------------
   8. Overlay
   -------------------------------------------- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu.is-open .mobile-menu__overlay {
  opacity: 1;
}

/* --------------------------------------------
   9. Menu Body（右スライド）
   -------------------------------------------- */
.mobile-menu__body {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(85vw, 360px);
  background: var(--color-bg-dark);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 32px rgba(0,0,0,0.3);
}

.mobile-menu.is-open .mobile-menu__body {
  transform: translateX(0);
}

/* --------------------------------------------
   10. Menu Header
   -------------------------------------------- */
.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.mobile-menu__logo .header__logo-name {
  color: var(--color-text-inverse);
}

.mobile-menu__close {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    transform var(--transition-base);
  flex-shrink: 0;
}

.mobile-menu__close:hover {
  background: rgba(255,255,255,0.14);
  transform: rotate(90deg);
}

/* --------------------------------------------
   11. Menu List
   -------------------------------------------- */
.mobile-menu__list {
  flex: 1;
  padding: var(--space-4) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-menu__item {
  opacity: 0;
  transform: translateX(16px);
  transition:
    opacity 0.35s ease,
    transform 0.35s ease;
}

.mobile-menu.is-open .mobile-menu__item {
  opacity: 1;
  transform: translateX(0);
}

/* アイテムごとに遅延 */
.mobile-menu.is-open .mobile-menu__item:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.is-open .mobile-menu__item:nth-child(2) { transition-delay: 0.10s; }
.mobile-menu.is-open .mobile-menu__item:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.is-open .mobile-menu__item:nth-child(4) { transition-delay: 0.20s; }
.mobile-menu.is-open .mobile-menu__item:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu.is-open .mobile-menu__item:nth-child(6) { transition-delay: 0.30s; }

.mobile-menu__link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast);
}

.mobile-menu__link:hover {
  background: rgba(255,255,255,0.06);
  transform: translateX(4px);
}

.mobile-menu__link-num {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: var(--tracking-wide);
  min-width: 20px;
  flex-shrink: 0;
}

.mobile-menu__link-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mobile-menu__link-label {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-inverse);
  line-height: 1;
}

.mobile-menu__link-desc {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  line-height: 1;
}

.mobile-menu__link-arrow {
  color: rgba(255,255,255,0.3);
  transition: color var(--transition-fast),
              transform var(--transition-fast);
  flex-shrink: 0;
}

.mobile-menu__link:hover .mobile-menu__link-arrow {
  color: var(--color-accent);
  transform: translateX(4px);
}

/* --------------------------------------------
   12. Mobile CTA
   -------------------------------------------- */
.mobile-menu__cta {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  border-top: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.mobile-menu__cta-btn {
  width: 100%;
  justify-content: center;
}

/* --------------------------------------------
   13. Mobile Note
   -------------------------------------------- */
.mobile-menu__note {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
  text-align: center;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

/* --------------------------------------------
   14. Body Lock（メニュー開放時のスクロール防止）
   -------------------------------------------- */
body.menu-open {
  overflow: hidden;
}

/* --------------------------------------------
   15. Responsive
   -------------------------------------------- */
@media (max-width: 1023px) {
  .header__nav,
  .header__cta {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none !important;
  }
}

@media (max-width: 767px) {
  .header__inner {
    height: 64px;
    padding-inline: var(--space-5);
  }
}