/*================================================
  基本設定と変数
=================================================*/
:root {
  --color-bg: #121212;
  --color-surface: #1e1e1e;
  --color-primary: #ffffff;
  --color-secondary: #aaaaaa;
  /* 落ち着いた薄めの青に変更 */
  --color-accent-start: #78a9ff;
  --color-accent-end: #78a9ff;
  --color-danger: #ff6b6b;
  --danger-ring: rgba(255, 107, 107, 0.18);
  --color-border: rgba(255, 255, 255, 0.1);
  --bg-image: url("../images/background.avif");
  --font-base: "Zen Kaku Gothic New", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans CJK JP", "Yu Gothic", sans-serif;
  --radius: 12px;
  --content-width: 1100px;
  --header-height: 80px;
  --btn-bg: rgba(255, 255, 255, 0.12);
  --btn-bg-hover: rgba(255, 255, 255, 0.18);
  --btn-border: rgba(255, 255, 255, 0.25);
  --btn-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
  --field-bg: rgba(255, 255, 255, 0.06);
  --field-border: rgba(255, 255, 255, 0.18);
  --field-focus-ring: rgba(120, 169, 255, 0.25);
  /* focus-ringの色も合わせる */
  --color-text-muted: var(--color-secondary);

  /* Typography & Design Variables */
  --text-body: 1.05rem;
  /* 16.8px equivalent - Maintainable base size */
  --text-h1: 2.5rem;
  /* PC size */
  --text-h1-mobile: 1.5rem;
  /* Mobile size */
  --text-h2: 2.0rem;
  --text-h2-mobile: 1.75rem;
  --text-gradient: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-start) 100%);
}

/*================================================
  基本的なスタイルリセットと共通設定
=================================================*/
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-primary);
  font-family: var(--font-base);
  font-size: var(--text-body);
  /* Set base font size from variable */
  font-weight: 500;
  letter-spacing: 0.05em;
  /* 文字間隔を広げてモダンに */
  line-height: 1.8;
  /* 行間も少し広げる */
  background-image: var(--bg-image);
  transition: background-color 0.3s ease, color 0.3s ease, background-image 0.3s ease;
  color-scheme: dark;
}

/* Hide the main layout until the first view overlay is mounted */
html[data-first-view="pending"] body>* {
  visibility: hidden;
}

html[data-first-view="pending"] body>.first-view-overlay {
  visibility: visible;
}

html[data-theme="white"] {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-primary: #111111;
  --color-secondary: #4a4a4a;
  --color-primary-rgb: 17, 17, 17;
  /* for rgba(var(--color-primary-rgb), ...) if needed */
  --color-accent-start: #4a80d6;
  /* ライトモード用に少し濃いめだが落ち着いた色 */
  --color-accent-end: #4a80d6;
  --color-danger: #ff6b6b;
  --danger-ring: rgba(176, 0, 32, 0.16);
  --color-border: rgba(17, 17, 17, 0.1);
  --bg-image: url("../images/background-light.avif");
  --btn-bg: rgba(17, 17, 17, 0.06);
  --btn-bg-hover: rgba(17, 17, 17, 0.09);
  --btn-border: rgba(17, 17, 17, 0.18);
  --btn-shadow: 0 10px 24px rgba(17, 17, 17, 0.12);
  --field-bg: rgba(17, 17, 17, 0.03);
  --field-border: rgba(17, 17, 17, 0.18);
  --field-focus-ring: rgba(74, 128, 214, 0.2);
  --color-text-muted: #444444;
  color-scheme: light;
}

html[data-theme="white"] body {
  color-scheme: light;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

a {
  color: var(--color-accent-end);
  text-decoration: none;
  transition: opacity 0.2s, color 0.2s;
}

a:hover {
  opacity: 0.8;
}

h1,
h2,
h3 {
  line-height: 1.4;
  font-weight: 700;
}

.no-break {
  white-space: nowrap;
  word-break: keep-all;
  line-break: strict;
}

.container {
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container.narrow {
  max-width: 800px;
}

/*================================================
  ヘッダー
=================================================*/
.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.main-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  padding: 0;
  margin: 0;
  /* 全画面サイズでナビを中央に配置 */
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-left a {
  color: var(--color-secondary);
  font-weight: bold;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
}

.nav-left a:hover,
body[data-page="home"] [data-nav="home"],
body[data-page="about"] [data-nav="about"],
body[data-page="contact"] [data-nav="contact"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent-end);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-right: 0;
}

.nav-right img {
  width: 32px;
  height: 32px;
}

.mode-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.mode-toggle:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.mode-toggle:focus-visible {
  outline: 2px solid var(--color-accent-end);
  outline-offset: 3px;
}

.mode-toggle__icon {
  width: 1.6rem;
  height: 1.6rem;
  transition: transform 0.3s ease, opacity 0.3s ease;
  object-fit: contain;
  pointer-events: none;
}

.mode-toggle.is-light {
  border-color: rgba(17, 17, 17, 0.18);
  background: rgba(255, 255, 255, 0.9);
  color: #111111;
  box-shadow: 0 10px 24px rgba(17, 17, 17, 0.16);
}

.mode-toggle.is-light .mode-toggle__icon {
  transform: rotate(-20deg);
}

html[data-theme="white"] .mode-toggle {
  border-color: rgba(17, 17, 17, 0.2);
  background: rgba(17, 17, 17, 0.08);
  color: var(--color-primary);
  box-shadow: none;
}

html[data-theme="white"] .mode-toggle:hover {
  background: rgba(17, 17, 17, 0.12);
}

html[data-theme="white"] img[data-invert-on-white="true"] {
  filter: invert(1);
}


/*================================================
  メインコンテンツ
=================================================*/
main.page {
  padding-top: 0;
  padding-bottom: 3rem;
}

/* Section spacing increase */
.section {
  padding: 4rem 0;
  /* Previously might have been smaller, increasing for modern feel */
  /* User requested to reduce top padding to match index page (approx 4rem) */
  position: relative;
}

.section.alt {
  background-color: var(--color-surface);
}

/*================================================
  トップページ: ヒーローセクション
=================================================*/
.hero {
  padding: 4rem 0;
  text-align: center;
}

.hero>h1 {
  font-size: 2.8rem;
  margin-top: 0;
  margin-bottom: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35em;
  text-wrap: balance;
  /* 行のバランスを最適化 */
  word-break: keep-all;
  /* 単語や中点で折らない */
  line-break: strict;
  /* 日本語禁則処理 */
}

.hero>h1 span {
  display: inline-block;
  white-space: nowrap;
  /* 各語の途中で折れない */
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.hero-media,
.hero-copy {
  width: 100%;
}

.hero-copy {
  text-align: center;
  max-width: 800px;
}

.hero-copy .lead {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.hero-copy .greeting {
  color: var(--color-secondary);
}

/*================================================
  汎用グリッド
=================================================*/
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid.two {
  grid-template-columns: repeat(2, 1fr);
}

/* ギャラリー */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.gallery-grid img {
  border-radius: var(--radius);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  width: 100%;
}

/*================================================
  コンポーネント（ボタン、カードなど）
=================================================*/
.cta-row {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  font-weight: bold;
  text-align: center;
  border: 2px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--color-primary);
  box-shadow: none;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  background: var(--btn-bg-hover);
  box-shadow: var(--btn-shadow);
}

.btn:active {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-end);
  outline-offset: 3px;
}

.btn.primary {
  /* グラデーション廃止して単色に */
  background: var(--color-accent-start);
  color: #121212;
  /* 薄い青背景なので文字は黒っぽくした方が可読性高いかも？いや、白が良いか確認 */
  color: #ffffff;
  /* ひとまず白で。視認性悪ければ調整 */
  border-color: rgba(255, 255, 255, 0.1);
}

/* 背景色が薄めになった場合、文字色を黒系にした方が読みやすい場合があるが、
   選んだ #78a9ff は白文字でも読める範囲。
   ライトモードの #4a80d6 は白文字OK。
*/
html[data-theme="white"] .btn.primary {
  border-color: rgba(17, 17, 17, 0.12);
}

.btn.ghost {
  border-color: var(--color-secondary);
  color: var(--color-primary);
  background: transparent;
}

.btn.ghost:hover {
  background: var(--btn-bg-hover);
}

.btn.lg {
  padding: 1rem 2rem;
}

/* カード */
.card {
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
}

.card.info {
  background: linear-gradient(45deg, rgba(0, 114, 255, 0.1), rgba(0, 198, 255, 0.1));
  border: 1px solid var(--color-accent-start);
}

/* お問い合わせページ */
.contact-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

html[data-theme="dark"] body[data-page="contact"] {
  --field-bg: #000000;
  --field-border: rgba(255, 255, 255, 0.22);
}

html[data-theme="white"] body[data-page="contact"] {
  --field-bg: #ffffff;
  --field-border: rgba(17, 17, 17, 0.18);
}

/* CONTACT: ダークは黒基調、ライトは白基調 */
html[data-theme="dark"] body[data-page="contact"] .card {
  background-color: #000000;
  color: #ffffff;
  --color-primary: #ffffff;
  --color-secondary: rgba(255, 255, 255, 0.72);
  --color-danger: #b00020;
  --danger-ring: rgba(255, 107, 107, 0.18);
  --color-border: rgba(255, 255, 255, 0.14);
}

html[data-theme="dark"] body[data-page="contact"] .card.info {
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

html[data-theme="white"] body[data-page="contact"] .card.info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

html[data-theme="dark"] body[data-page="contact"] .embed-card {
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

html[data-theme="white"] body[data-page="contact"] .embed-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 12px 28px rgba(17, 17, 17, 0.10);
}

body[data-page="contact"] .contact-form {
  margin-top: 0.25rem;
}

/* フォーム切り替えスイッチ（タブ風デザイン） */
body[data-page="contact"] .form-switch-row {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
  padding: 0 1rem;
}

body[data-page="contact"] .form-switch {
  display: flex;
  background-color: transparent;
  border-radius: 0;
  overflow: visible;
  position: relative;
  padding: 0;
  width: 100%;
  max-width: 460px;
  gap: 0.5rem;
}

/* タブの下線ベース */
body[data-page="contact"] .form-switch::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-border);
}

body[data-page="contact"] .form-switch input[type="radio"] {
  display: none;
}

body[data-page="contact"] .form-switch label {
  flex: 1;
  cursor: pointer;
  padding: 1rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-secondary);
  text-align: center;
  border-radius: 0;
  transition: all 0.25s ease;
  user-select: none;
  white-space: nowrap;
  position: relative;
  background: transparent;
  border: none;
}

h1,
.hero h1 {
  /* Apply explicitly to .hero h1 to overcome specificity issues */
  font-size: var(--text-h1);
  background: var(--text-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
  /* Crucial for background-clip: text to work on some browsers */
  width: fit-content;
  /* Ensure background doesn't stretch full width unnecessarily */
}

/* タブ下のアクティブインジケーター */
body[data-page="contact"] .form-switch label::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: transparent;
  transition: background-color 0.25s ease, transform 0.25s ease;
  transform: scaleX(0);
  z-index: 1;
}

/* 選択された状態 */
body[data-page="contact"] .form-switch input[type="radio"]:checked+label {
  color: var(--color-accent-end);
  background: transparent;
  box-shadow: none;
  transform: none;
}

body[data-page="contact"] .form-switch input[type="radio"]:checked+label::after {
  background-color: var(--color-accent-end);
  transform: scaleX(1);
}

html[data-theme="white"] body[data-page="contact"] .form-switch input[type="radio"]:checked+label {
  color: var(--color-accent-end);
  background: transparent;
}

html[data-theme="white"] body[data-page="contact"] .form-switch input[type="radio"]:checked+label::after {
  background-color: var(--color-accent-end);
}

/* ホバー時のフィードバック（非選択タブ） */
body[data-page="contact"] .form-switch label:hover {
  color: var(--color-primary);
  background-color: rgba(255, 255, 255, 0.05);
}

body[data-page="contact"] .form-switch label:hover::after {
  background-color: var(--color-secondary);
  transform: scaleX(0.5);
}

/* 選択済みホバー */
body[data-page="contact"] .form-switch input[type="radio"]:checked+label:hover {
  color: var(--color-accent-end);
  background: transparent;
}

body[data-page="contact"] .form-switch input[type="radio"]:checked+label:hover::after {
  background-color: var(--color-accent-end);
  transform: scaleX(1);
}

html[data-theme="white"] body[data-page="contact"] .form-switch label:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

html[data-theme="white"] body[data-page="contact"] .form-switch input[type="radio"]:checked+label:hover {
  background-color: transparent;
}

body[data-page="contact"] .form-grid {
  display: grid;
  gap: 1.1rem;
}

body[data-page="contact"] .form-row {
  display: grid;
  gap: 0.45rem;
}

body[data-page="contact"] .form-label {
  font-weight: 700;
  letter-spacing: 0.01em;
}

body[data-page="contact"] .req,
body[data-page="contact"] .opt {
  display: inline-flex;
  align-items: center;
  padding: 0.05rem 0.4rem;
  margin-left: 0.4rem;
  border-radius: 999px;
  font-size: 0.7rem;
  line-height: 1.5;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-secondary);
}

html[data-theme="white"] body[data-page="contact"] .opt {
  background: transparent;
}

body[data-page="contact"] .req {
  color: #ffffff;
  border-color: var(--color-danger);
  background: var(--color-danger);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
}

body[data-page="contact"] .req::before {
  content: none;
}

body[data-page="contact"] .form-input {
  width: 100%;
  border-radius: calc(var(--radius) - 6px);
  border: 1px solid var(--field-border);
  background: var(--field-bg);
  color: var(--color-primary);
  padding: 0.8rem 0.9rem;
  line-height: 1.45;
  font-family: var(--font-base);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

body[data-page="contact"] textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

body[data-page="contact"] .form-input::placeholder {
  color: var(--color-secondary);
  opacity: 0.85;
}

body[data-page="contact"] .form-input:focus {
  outline: none;
  border-color: var(--color-accent-end);
  box-shadow: 0 0 0 3px var(--field-focus-ring);
}

body[data-page="contact"] .form-input.is-invalid {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px var(--danger-ring);
}

body[data-page="contact"] .form-hint {
  margin: 0;
  color: var(--color-secondary);
  font-size: 0.9rem;
}

body[data-page="contact"] .form-error {
  margin: 0;
  min-height: 1.2em;
  color: var(--color-danger);
  font-size: 0.9rem;
}

body[data-page="contact"] .form-fieldset {
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) - 6px);
  padding: 1rem;
  background: transparent;
}

html[data-theme="white"] body[data-page="contact"] .form-fieldset {
  background: transparent;
}

body[data-page="contact"] .form-fieldset.is-invalid {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px var(--danger-ring);
}

body[data-page="contact"] .checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.9rem;
}

body[data-page="contact"] .check {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: transparent;
  user-select: none;
}

html[data-theme="white"] body[data-page="contact"] .check {
  background: transparent;
}

body[data-page="contact"] .check input {
  accent-color: var(--color-accent-end);
}

body[data-page="contact"] .form-actions {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.75rem;
  justify-items: center;
  /* ボタンを中央寄せにし、横幅いっぱいになるのを防ぐ */
}

body[data-page="contact"] .form-actions .btn {
  min-width: 200px;
  /* 極端に小さくなりすぎないよう最低限の幅は確保 */
  padding: 0.6rem 2rem;
  /* パディングを少し控えめに */
}

body[data-page="contact"] .form-note {
  margin: 0;
}

.is-hidden {
  display: none !important;
}

/* ABOUTページ: コンテンツ中央配置のまま文字を左揃え */
body[data-page="about"] .page .container {
  text-align: left;
}

/* Aboutページ: セクション間の余白を詰める */
body[data-page="about"] .section:first-of-type {
  padding-bottom: 0;
}

body[data-page="about"] .section:nth-of-type(2) {
  padding-top: 2rem;
}

body[data-page="about"] .about-details {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

body[data-page="about"] .about-details>div {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

body[data-page="about"] .about-details h2 {
  margin: 0;
}

body[data-page="about"] .about-details p {
  margin: 0;
}

body[data-page="about"] .about-details p+p {
  margin-top: 0.5rem;
}

.checklist {
  list-style: "? ";
  padding-left: 1.5rem;
}

.muted {
  color: var(--color-secondary);
  font-size: 0.9rem;
}

/* 写真紹介カード */
.showcase-list {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(3, 1fr);

  /* 全体を一つのカードにする */
  background-color: #ffffff;
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.showcase-list figure {
  margin: 0;
  /* 個別のカードスタイルは解除 */
  background-color: transparent;
  padding: 0;
  box-shadow: none;
  border-radius: 0;
  transition: transform 0.2s ease;
}

.showcase-list figure:hover {
  transform: translateY(-4px);
  /* 個別の影は不要 */
  box-shadow: none;
}

.showcase-list img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
}

.showcase-list figcaption {
  margin-top: 0.5rem;
  font-weight: bold;
  font-size: 0.95rem;
  color: #111111;
  text-align: center;
  line-height: 1.4;
}

/* ダークモード時の調整 */
html[data-theme="dark"] .showcase-list {
  background-color: #111111;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* レスポンシブでグリッドのカラム数を調整 */
@media (max-width: 768px) {
  .showcase-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/*================================================
  フッター
=================================================*/
.site-footer {
  text-align: center;
  padding: 3rem 0;
  color: var(--color-secondary);
  border-top: 1px solid var(--color-border);
}

/*================================================
  レスポンシブ設定
=================================================*/
@media (max-width: 768px) {
  .main-nav {
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
  }

  .nav-left {
    order: 3;
    width: 100%;
    margin-top: 0.5rem;
    gap: 1rem;
    font-size: 0.9rem;
    flex-wrap: wrap;
    /* モバイルでは絶対配置を解除して通常のフローに戻す */
    position: static;
    transform: none;
    /* ナビリンクを画面中央に配置 */
    display: flex;
    justify-content: center;
    text-align: center;
  }

  .nav-right {
    order: 2;
    width: auto;
    margin-left: auto;
    justify-content: flex-end;
    gap: 0.75rem;
    align-self: flex-start;
    /* 電球の右端を写真の右端と完全に揃えるための微調整 */
    padding-right: 3px;
  }

  .mode-toggle {
    margin: 0;
  }

  .hero {
    padding: 2rem 0;
  }

  .hero>h1 {
    font-size: var(--text-h1-mobile);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2em;
    text-align: center;
    width: 100%;
  }

  .hero>h1 span {
    white-space: normal;
    word-break: keep-all;
    /* 単語の区切りでは改行する */
    overflow-wrap: break-word;
    /* 長すぎる単語は強制的に改行 */
    max-width: 100%;
    /* 画面幅を超えないようにする */
  }

  /* お問い合わせページの見出しはデフォルト（左寄せ）のまま */
  /* body[data-page="contact"] .container > h1 { ... } removed to keep left align */

  /* フォーム周りのモバイル調整 */
  body[data-page="contact"] .embed-card,
  body[data-page="contact"] .form-switch,
  body[data-page="contact"] .form-input {
    max-width: 100% !important;
    width: 100%;
    box-sizing: border-box;
  }

  /* モバイルでの見出し折り返しと言語ごとの調整 */
  .no-break {
    white-space: normal;
    word-break: keep-all;
    overflow-wrap: break-word;
  }

  .grid.two {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  body[data-page="contact"] .form-switch label {
    font-size: 0.8rem;
    padding: 0.6rem 0.4rem;
  }
}

/*================================================
  View Transitions API（ページ遷移アニメーション）
=================================================*/
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.25s;
  animation-timing-function: ease-out;
}

/* フェードイン・アウト */
::view-transition-old(root) {
  animation-name: fade-out;
}

::view-transition-new(root) {
  animation-name: fade-in;
}

@keyframes fade-out {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}