/* ============================================================
   エンプレス歯科 デザインシステム
   Empress Dental — Global Design System
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@300;400;600;700&display=swap');

/* ---------- CSS カスタムプロパティ ---------- */
:root {
  /* カラーパレット */
  --color-white:        #FFFFFF;
  --color-ivory:        #FAFAF7;
  --color-ivory-dark:   #F3F0EA;
  --color-gold:         #C9A96E;
  --color-gold-light:   #E8D5B0;
  --color-gold-dark:    #A8843E;
  --color-navy:         #1A2E4A;
  --color-navy-light:   #2C4A6E;
  --color-navy-muted:   #3D5A7A;
  --color-text:         #2D2D2D;
  --color-text-mid:     #555555;
  --color-text-light:   #888888;
  --color-border:       #E4DDD3;
  --color-border-light: #F0EBE3;
  --color-green:        #3D7D5A;
  --color-green-light:  #4E9E72;

  /* フォント */
  --font-serif:  'Noto Serif JP', 'Hiragino Mincho ProN', serif;
  --font-sans:   'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-latin:  'Cormorant Garamond', Georgia, serif;

  /* スペーシング */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;
  --space-2xl: 9rem;

  /* ボーダー半径 */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-full: 9999px;

  /* シャドウ */
  --shadow-sm:  0 2px 8px rgba(26, 46, 74, 0.08);
  --shadow-md:  0 6px 24px rgba(26, 46, 74, 0.12);
  --shadow-lg:  0 16px 48px rgba(26, 46, 74, 0.16);
  --shadow-gold: 0 8px 32px rgba(201, 169, 110, 0.25);

  /* トランジション */
  --transition-fast: 0.2s ease;
  --transition-mid:  0.35s ease;
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* コンテナ幅 */
  --container-max: 1100px;
  --container-narrow: 780px;
}

/* ---------- リセット & ベース ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.8;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ---------- タイポグラフィ ---------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

.latin {
  font-family: var(--font-latin);
  font-style: italic;
}

/* ---------- コンテナ ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* ---------- セクション ---------- */
.section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.section--sm {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.section--lg {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

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

.section--navy {
  background-color: var(--color-navy);
  color: var(--color-white);
}

/* ---------- セクションヘッダー ---------- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-label {
  display: inline-block;
  font-family: var(--font-latin);
  font-size: 0.875rem;
  font-style: italic;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--color-navy);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  margin: 1rem auto 0;
}

.section-desc {
  margin-top: 1.25rem;
  font-size: 0.975rem;
  color: var(--color-text-mid);
  line-height: 1.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2.25rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  transition: all var(--transition-mid);
  white-space: nowrap;
}

.btn--gold {
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-gold);
}

.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(201, 169, 110, 0.4);
}

.btn--outline {
  border: 1.5px solid var(--color-gold);
  color: var(--color-gold);
  background: transparent;
}

.btn--outline:hover {
  background: var(--color-gold);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--navy {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn--navy:hover {
  background: var(--color-navy-light);
  transform: translateY(-2px);
}

.btn--phone {
  background: linear-gradient(135deg, var(--color-green) 0%, var(--color-green-light) 100%);
  color: var(--color-white);
  box-shadow: 0 6px 20px rgba(61, 125, 90, 0.3);
}

.btn--phone:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(61, 125, 90, 0.4);
}

.btn--lg {
  padding: 1.1rem 3rem;
  font-size: 1rem;
}

/* ---------- ヘッダー ---------- */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-mid);
  will-change: transform;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.site-logo__img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.site-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-logo__en {
  font-family: var(--font-latin);
  font-size: 1.25rem;
  font-style: italic;
  letter-spacing: 0.08em;
  color: var(--color-navy);
}

.site-logo__ja {
  font-family: var(--font-serif);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--color-gold);
}

/* ---------- ナビゲーション ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-navy);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0.9rem;
  right: 0.9rem;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-gold-dark);
}

.site-nav__link:hover::after {
  transform: scaleX(1);
}

/* ---------- ヘッダーCTA ---------- */
.header-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header-phone {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
}

.header-phone__number {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.04em;
}

.header-phone__note {
  font-size: 0.68rem;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
}

/* ---------- ハンバーガーメニュー ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  transition: all var(--transition-fast);
}

/* ---------- モバイルメニュー ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 999;
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu__link {
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-navy);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-menu__cta {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.mobile-menu__cta .btn {
  flex: 1;
  justify-content: center;
  font-size: 0.85rem;
  padding: 0.875rem 1rem;
}

/* ---------- フローティングCTAバー（モバイル） ---------- */
.float-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 998;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  gap: 0.6rem;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
}

.float-cta__btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: all var(--transition-fast);
}

.float-cta__btn--phone {
  background: linear-gradient(135deg, var(--color-green), var(--color-green-light));
  color: var(--color-white);
}

.float-cta__btn--web {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: var(--color-white);
}

/* ---------- フッター ---------- */
#site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.85);
}

.footer-main {
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-lg);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.footer-logo__img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.footer-logo__text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.footer-logo__en {
  font-family: var(--font-latin);
  font-size: 1.4rem;
  font-style: italic;
  color: var(--color-white);
  letter-spacing: 0.08em;
}

.footer-logo__ja {
  font-family: var(--font-serif);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--color-gold);
}

.footer-info {
  font-size: 0.85rem;
  line-height: 1.9;
  color: rgba(255,255,255,0.7);
}

.footer-info__item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.footer-info__icon {
  color: var(--color-gold);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.footer-col-title {
  font-family: var(--font-latin);
  font-size: 0.78rem;
  font-style: italic;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-nav__link {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  padding: 0.2rem 0;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-nav__link::before {
  content: '›';
  color: var(--color-gold);
}

.footer-nav__link:hover {
  color: var(--color-gold-light);
}

.footer-hours {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  line-height: 2;
}

.footer-hours table {
  width: 100%;
  border-collapse: collapse;
}

.footer-hours td {
  padding: 0.15rem 0.5rem 0.15rem 0;
  vertical-align: top;
}

.footer-hours td:first-child {
  color: rgba(255,255,255,0.5);
  white-space: nowrap;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-copy {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.05em;
}

.footer-bottom-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-nav a {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}

.footer-bottom-nav a:hover {
  color: var(--color-gold-light);
}

/* ---------- パンくずリスト ---------- */
.breadcrumb {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.breadcrumb__item a {
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.breadcrumb__item a:hover {
  color: var(--color-gold);
}

.breadcrumb__sep {
  color: var(--color-border);
}

/* ---------- ページヒーロー（内部ページ） ---------- */
.page-hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  padding: 5rem 0 3.5rem;
  margin-top: 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a96e' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-hero__label {
  font-family: var(--font-latin);
  font-size: 0.875rem;
  font-style: italic;
  letter-spacing: 0.25em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.page-hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-white);
  letter-spacing: 0.08em;
}

/* ---------- カードグリッド ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card__img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.card__body {
  padding: 1.75rem;
}

.card__label {
  font-family: var(--font-latin);
  font-size: 0.78rem;
  font-style: italic;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.5rem;
}

.card__title {
  font-size: 1.2rem;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
}

.card__desc {
  font-size: 0.88rem;
  color: var(--color-text-mid);
  line-height: 1.8;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gold-dark);
  transition: gap var(--transition-fast);
}

.card__link:hover {
  gap: 0.65rem;
}

/* ---------- ゴールドライン区切り ---------- */
.gold-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: var(--space-md) auto;
  max-width: 200px;
}

.gold-divider::before,
.gold-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold));
}

.gold-divider::after {
  background: linear-gradient(90deg, var(--color-gold), transparent);
}

.gold-divider__diamond {
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  transform: rotate(45deg);
  flex-shrink: 0;
}

/* ---------- スクロールアニメーション ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform; /* 描画パフォーマンス向上 */
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }
.fade-in-delay-5 { transition-delay: 0.5s; }

/* ---------- ユーティリティ ---------- */
.text-center { text-align: center; }
.text-gold    { color: var(--color-gold); }
.text-navy    { color: var(--color-navy); }
.text-white   { color: var(--color-white); }
.text-sm      { font-size: 0.875rem; }
.fw-bold      { font-weight: 700; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }

/* ---------- レスポンシブ ---------- */
@media (max-width: 1024px) {
  .site-nav { display: none; }
  .hamburger { display: flex; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 768px) {
  :root {
    --space-xl:  4rem;
    --space-2xl: 6rem;
  }

  .header-phone { display: none; }
  .float-cta    { display: flex; }

  body { padding-bottom: 72px; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
}

/* ---------- CTAセクション ---------- */
#cta {
  background: linear-gradient(135deg, var(--color-navy) 0%, #0d1e34 100%);
  padding: var(--space-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* 光のリング装飾 */
#cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  border-radius: 50%;
  border: 1px solid rgba(201,169,110,0.12);
  animation: ringPulse 4s ease-in-out infinite;
}

#cta::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  border-radius: 50%;
  border: 1px solid rgba(201,169,110,0.08);
  animation: ringPulse 4s ease-in-out 2s infinite;
}

@keyframes ringPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50%       { transform: translate(-50%, -50%) scale(1.04); opacity: 0.6; }
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-label {
  font-family: var(--font-latin);
  font-size: 0.8rem;
  font-style: italic;
  letter-spacing: 0.25em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--color-white);
  margin-bottom: 1rem;
  letter-spacing: 0.06em;
}

.cta-desc {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 3rem;
  line-height: 2;
}

.cta-divider {
  width: 1px;
  height: 60px;
  background: rgba(201,169,110,0.3);
  flex-shrink: 0;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.cta-phone-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.cta-phone-number {
  font-family: var(--font-latin);
  font-size: 2.4rem;
  font-style: italic;
  color: var(--color-white);
  letter-spacing: 0.05em;
  line-height: 1;
}

.cta-phone-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .cta-buttons { flex-direction: column; gap: 1.5rem; }
  .cta-divider { width: 60px; height: 1px; }
}