/**
 * Playground 共通ナビバー — React Header / MegaMenu / Footer と同等
 * theme.css の --pg-* 変数に依存
 */

/* ========================================
   0. 全体レイアウト補助
   ======================================== */
/* ヘッダー分の余白を body に追加（JS からも設定） */
body.pg-has-nav {
  padding-top: 112px !important; /* 64px header + 48px subheader */
  padding-bottom: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  min-height: 100vh !important;
}

.pg-spacer {
  flex: 1 0 0px;
  width: 100%;
}

/* ========================================
   1. ヘッダー
   ======================================== */
.pg-header {
  all: initial;
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 9999;
  background: var(--pg-bg, #f1f5f9);
  border-bottom: 1px solid var(--pg-border, #cbd5e1);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--pg-text, #1e293b);
  box-sizing: border-box;
  transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-header *,
.pg-header *::before,
.pg-header *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* React の nav.mx-auto.max-w-[--container-wide].px-[--container-padding] と同等 */
.pg-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
}

/* --- ロゴ --- */
@keyframes pg-flip-x {
  from { transform: rotateY(0); }
  to   { transform: rotateY(720deg); }
}

.pg-header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--pg-text, #1e293b);
  text-decoration: none;
  perspective: 600px;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.pg-header__logo svg:first-child {
  transform-style: preserve-3d;
}

.pg-header__logo:hover {
  color: var(--pg-accent, #0a5550);
}

.pg-header__logo:hover svg:first-child {
  animation: pg-flip-x 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-header__logo svg {
  flex-shrink: 0;
}

/* --- デスクトップナビ --- */
.pg-header__nav {
  display: none;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.pg-header__nav > li {
  display: flex;
  align-items: center;
}

/* link-slide 効果の再現 */
.pg-header__nav-link,
.pg-header__dropdown-toggle {
  display: inline-flex;
  align-items: center;
  padding-bottom: 3px;
  overflow: hidden;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: transparent;
  text-shadow:
    0 -1.5em 0 var(--pg-text-secondary, #334155),
    0 0 0 var(--pg-text-secondary, #334155);
  background-image: linear-gradient(var(--pg-accent, #0a5550), var(--pg-accent, #0a5550));
  background-repeat: no-repeat;
  background-position: bottom right;
  background-size: 0 1px;
  text-decoration: none;
  transition:
    text-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    background-size 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-header__nav-link:hover,
.pg-header__dropdown-toggle:hover {
  color: transparent;
  text-decoration: none;
  text-shadow:
    0 0 0 var(--pg-accent, #0a5550),
    0 1.5em 0 var(--pg-accent, #0a5550);
  background-image: linear-gradient(var(--pg-accent, #0a5550), var(--pg-accent, #0a5550));
  background-position: bottom left;
  background-size: 100% 1px;
}

/* ドロップダウントグルのシェブロン */
.pg-header__dropdown-toggle .pg-chevron {
  width: 0.75rem;
  height: 0.75rem;
  margin-left: 0.25rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  /* text-shadow の色を継承しない — 直接色を付与 */
  color: var(--pg-text-secondary, #334155);
  filter: none;
}

.pg-header__dropdown:hover .pg-chevron,
.pg-header__dropdown.is-open .pg-chevron {
  transform: rotate(180deg);
  color: var(--pg-accent, #0a5550);
}

/* --- 右側グループ（ナビ + テーマ + ハンバーガー） --- */
.pg-header__group {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-shrink: 0;
}

/* テーマトグル */
.pg-header__theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  border: 1px solid var(--pg-border, #cbd5e1);
  background: none;
  color: var(--pg-text-secondary, #334155);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  font-family: inherit;
}

.pg-header__theme-btn:hover {
  color: var(--pg-accent, #0a5550);
  border-color: var(--pg-accent, #0a5550);
}

.pg-header__theme-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ハンバーガー */
.pg-header__hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: none;
  border: none;
  color: var(--pg-text, #1e293b);
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  transition: color 0.2s;
}

.pg-header__hamburger:hover {
  color: var(--pg-accent, #0a5550);
}

.pg-header__hamburger svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* ========================================
   1.5. サブヘッダー（戻るボタン + タイトル）
   ======================================== */
.pg-subheader {
  all: initial;
  display: block;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  height: 48px;
  z-index: 9997;
  background: var(--pg-bg-secondary, #e2e8f0);
  border-bottom: 1px solid var(--pg-border, #cbd5e1);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--pg-text, #1e293b);
  box-sizing: border-box;
  transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-subheader *,
.pg-subheader *::before,
.pg-subheader *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.pg-subheader__inner {
  display: flex;
  align-items: center;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  gap: 1rem;
}

.pg-subheader__back {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--pg-text-secondary, #334155);
  text-decoration: none;
  transition: color 0.2s;
  flex-shrink: 0;
}

.pg-subheader__back:hover {
  color: var(--pg-accent, #0a5550);
}

.pg-subheader__back svg {
  width: 1rem;
  height: 1rem;
}

.pg-subheader__sep {
  color: var(--pg-border, #cbd5e1);
  font-size: 0.875rem;
  user-select: none;
}

.pg-subheader__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pg-text, #1e293b);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   2. メガメニュー
   ======================================== */
.pg-mega-overlay {
  position: fixed;
  top: 65px; /* header 64px + border 1px */
  left: 0;
  width: 100%;
  z-index: 9998;
  overflow: hidden;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-1rem);
  transition:
    opacity 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.pg-mega-overlay.is-open {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.pg-mega-bg {
  position: absolute;
  inset: 0;
  background: var(--pg-bg, #f1f5f9);
  border-bottom: 1px solid var(--pg-border, #cbd5e1);
  transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-inner {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* 左: イントロ */
.pg-mega-intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.pg-mega-intro h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--pg-text, #1e293b);
  margin: 0 0 1rem;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-intro p {
  color: var(--pg-text-secondary, #334155);
  line-height: 1.6;
  margin: 0 0 1rem;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-overview {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pg-accent, #0a5550);
  text-decoration: none;
  transition: color 0.2s;
}

.pg-mega-overview:hover {
  color: var(--pg-accent-hover, #115e59);
}

.pg-mega-overview svg {
  width: 1rem;
  height: 1rem;
}

/* 右: カードグリッド */
.pg-mega-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

/* card-hover 効果の再現 */
.pg-mega-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--pg-border, #cbd5e1);
  background: var(--pg-bg, #f1f5f9);
  text-decoration: none;
  color: inherit;
  transition: background 0.3s, border-color 0.3s;
}

.pg-mega-card:hover {
  background: var(--pg-bg-secondary, #e2e8f0);
  border-color: var(--pg-accent, #0a5550);
}

.pg-mega-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pg-text, #1e293b);
  margin: 0 0 0.75rem;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-card .pg-mega-card__desc {
  font-size: 0.875rem;
  color: var(--pg-text-secondary, #334155);
  line-height: 1.6;
  margin: 0 0 1.5rem;
  flex: 1;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-card__cta {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pg-accent, #0a5550);
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-card__cta .pg-arrow {
  display: inline-flex;
  overflow: hidden;
  max-width: 0;
  margin-left: 0;
  opacity: 0;
  transition:
    max-width 0.2s cubic-bezier(0.4, 0, 0.2, 1),
    margin-left 0.2s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-mega-card__cta svg {
  width: 1rem;
  height: 1rem;
}

.pg-mega-card:hover .pg-arrow {
  max-width: 1.5rem;
  margin-left: 0.25rem;
  opacity: 1;
}

/* ========================================
   3. モバイルメニュー
   ======================================== */
.pg-mobile-menu {
  display: none;
  position: fixed;
  top: 112px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--pg-bg, #f1f5f9);
  z-index: 9998;
  padding: 1rem 1.5rem;
  overflow-y: auto;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.pg-mobile-menu *,
.pg-mobile-menu *::before,
.pg-mobile-menu *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.pg-mobile-menu ul {
  list-style: none;
}

.pg-mobile-menu > ul > li {
  border-bottom: 1px solid var(--pg-border, #cbd5e1);
}

.pg-mobile-menu a {
  display: block;
  padding: 0.75rem 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--pg-text-secondary, #334155);
  text-decoration: none;
  transition: color 0.2s;
}

.pg-mobile-menu a:hover {
  color: var(--pg-accent, #0a5550);
}

/* モバイルアコーディオン */
.pg-mobile-accordion-btn {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--pg-text-secondary, #334155);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.2s;
}

.pg-mobile-accordion-btn:hover {
  color: var(--pg-accent, #0a5550);
}

.pg-mobile-accordion-btn svg {
  width: 1rem;
  height: 1rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: inherit;
}

.pg-mobile-accordion-btn.is-open svg {
  transform: rotate(180deg);
}

.pg-mobile-sub {
  display: none;
  padding-left: 1rem;
}

.pg-mobile-sub.is-open {
  display: block;
}

.pg-mobile-sub a {
  font-size: 0.875rem;
  color: var(--pg-text-secondary, #334155);
}

.pg-mobile-overview {
  display: block;
  padding: 0.75rem 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pg-accent, #0a5550) !important;
  text-decoration: none;
  transition: color 0.2s;
}

.pg-mobile-overview:hover {
  color: var(--pg-accent-hover, #115e59) !important;
}

/* ========================================
   4. フッター
   ======================================== */
.pg-footer {
  all: initial;
  display: block;
  width: 100%;
  background: var(--pg-bg-secondary, #e2e8f0);
  border-top: 1px solid var(--pg-border, #cbd5e1);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--pg-text, #1e293b);
  box-sizing: border-box;
  transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-footer *,
.pg-footer *::before,
.pg-footer *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.pg-footer__inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

.pg-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

/* フッターロゴ */
.pg-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--pg-text, #1e293b);
  text-decoration: none;
  perspective: 600px;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-footer__logo svg:first-child {
  transform-style: preserve-3d;
}

.pg-footer__logo:hover {
  color: var(--pg-accent, #0a5550);
}

.pg-footer__logo:hover svg:first-child {
  animation: pg-flip-x 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-footer__logo svg {
  flex-shrink: 0;
}

.pg-footer__tagline {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--pg-text-secondary, #334155);
  line-height: 1.6;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-footer__section h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--pg-text, #1e293b);
  margin: 0 0 1rem;
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-footer__section ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* link-slide 効果（フッター版） */
.pg-footer__section a {
  display: inline-flex;
  align-items: center;
  padding-bottom: 3px;
  overflow: hidden;
  font-size: 0.875rem;
  color: transparent;
  text-shadow:
    0 -1.5em 0 var(--pg-text-secondary, #334155),
    0 0 0 var(--pg-text-secondary, #334155);
  background-image: linear-gradient(var(--pg-accent, #0a5550), var(--pg-accent, #0a5550));
  background-repeat: no-repeat;
  background-position: bottom right;
  background-size: 0 1px;
  text-decoration: none;
  transition:
    text-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    background-size 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pg-footer__section a:hover {
  text-shadow:
    0 0 0 var(--pg-accent, #0a5550),
    0 1.5em 0 var(--pg-accent, #0a5550);
  background-position: bottom left;
  background-size: 100% 1px;
}

.pg-footer__copy {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--pg-border, #cbd5e1);
  text-align: center;
  font-size: 0.875rem;
  color: var(--pg-text-secondary, #334155);
  transition: color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   5. レスポンシブ
   ======================================== */
@media (min-width: 768px) {
  .pg-header {
    padding: 0 2rem;
  }
  .pg-header__nav {
    display: flex;
  }
  .pg-header__hamburger {
    display: none;
  }
  .pg-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
  .pg-mega-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pg-mega-inner {
    flex-direction: row;
    gap: 6rem;
    padding: 4rem 1.5rem;
  }
  .pg-mega-intro {
    width: 33%;
    flex-shrink: 0;
  }
  .pg-mega-cards {
    flex: 1;
  }
}

/* ========================================
   6. フォーカスリング
   ======================================== */
.pg-header :focus-visible,
.pg-subheader :focus-visible,
.pg-footer :focus-visible,
.pg-mega-overlay :focus-visible,
.pg-mobile-menu :focus-visible {
  outline: 3px solid var(--pg-accent, #0a5550);
  outline-offset: 2px;
}