/* ==========================================================================
   純喫茶 珈琲館 ベル - スタイルシート
   デザインテーマ: 昭和レトロヴィンテージ ＆ 琥珀マホガニー
   ========================================================================== */

/* 変数定義 */
:root {
  --bg-dark: #291a10;      /* 深い珈琲ブラウン */
  --bg-panel: #1e150f;     /* 暗いマホガニー */
  --bg-card: #1c1917;      /* チャコールブラウン */
  --bg-input: #120e0b;     /* 極暗のブラウン */
  --text-light: #fafaf7;   /* ミルクホワイト */
  --text-muted: #a8a29e;   /* 砂岩グレー */
  
  --accent-gold: #d97706;    /* 真鍮ゴールド・琥珀色 */
  --accent-gold-hover: #b45309;
  --accent-red: #991b1b;     /* ベロアエンジ */
  --accent-cherry: #dc2626;  /* チェリー赤 */
  
  --border-color: #451a03;   /* 薄いマホガニーボーダー */
  --border-focus: #d97706;
  --border-error: #b91c1c;   /* 警告赤 */
  --border-success: #16a34a;
  
  --font-serif: "Noto Serif JP", "Playfair Display", serif;
  --font-sans: "Inter", "Noto Sans JP", sans-serif;
  --font-mono: monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
}

/* 基本設定 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* スキップリンク */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background-color: var(--accent-gold);
  color: var(--bg-dark);
  padding: 10px 20px;
  font-weight: bold;
  z-index: 1000;
  transition: top 0.2s ease;
  text-decoration: none;
  border-radius: 4px;
}

.skip-link:focus {
  top: 20px;
}

/* タイポグラフィ & 装飾 */
h1, h2, h3, .logo-text, .avatar-calligraphy {
  font-family: var(--font-serif);
  font-weight: 900;
}

p {
  color: var(--text-muted);
}

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

.font-mono {
  font-family: var(--font-mono);
}

.text-center {
  text-align: center;
}

/* スクロールバー */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

/* レイアウトコンテナ */
.section-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ヘッダー */
.main-header {
  position: sticky;
  top: 0;
  z-index: 150;
  background-color: rgba(41, 26, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 44px;
  height: 44px;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  color: var(--text-light);
}

.logo-text .accent-text {
  color: var(--accent-gold);
}

.logo-subtext {
  font-size: 0.6rem;
  font-family: var(--font-sans);
  color: var(--text-muted);
  letter-spacing: 0.15em;
  margin-top: -2px;
}

.main-nav ul {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  position: relative;
  padding: 4px 0;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-light);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-gold);
  transition: var(--transition-smooth);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.nav-cta {
  background-color: var(--accent-red);
  color: var(--text-light) !important;
  padding: 10px 20px !important;
  border-radius: 4px;
  font-weight: 700 !important;
  border: 1px solid var(--accent-gold);
  box-shadow: 0 4px 12px rgba(153, 27, 27, 0.3);
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(153, 27, 27, 0.5);
  background-color: var(--accent-gold);
  border-color: var(--text-light);
}

/* モバイルメニューボタン */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 200;
}

.mobile-menu-toggle .bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-light);
  transition: var(--transition-smooth);
}

/* モジュール展開トグルのアクティブスタイル */
.mobile-menu-toggle[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* モバイルメニュー */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--bg-dark);
  z-index: 140;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.mobile-menu:not([hidden]) {
  opacity: 1;
  visibility: visible;
}

.mobile-menu nav ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  list-style: none;
  gap: 24px;
}

.mobile-menu nav a {
  font-size: 1.5rem;
  font-family: var(--font-serif);
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.mobile-menu nav a:hover {
  color: var(--accent-gold);
}

.mobile-menu .nav-cta {
  font-size: 1.25rem;
  padding: 12px 32px !important;
}

/* ボタン基本 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--accent-red);
  color: var(--text-light);
  border: 1px solid var(--accent-gold);
  box-shadow: 0 4px 20px rgba(153, 27, 27, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(153, 27, 27, 0.5);
  background-color: var(--accent-gold);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.03);
  border-color: var(--accent-gold);
}

.btn-outline {
  background: transparent;
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
}

.btn-outline:hover {
  background-color: var(--accent-gold);
  color: var(--bg-dark);
}

/* ヒーローセクション */
.hero-section {
  position: relative;
  padding: 100px 0 80px;
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(ellipse at 50% 30%, rgba(217, 119, 6, 0.1) 0%, transparent 60%),
    linear-gradient(rgba(41, 26, 16, 0.85), rgba(41, 26, 16, 0.85)),
    repeating-linear-gradient(45deg, #1e150f 0px, #1e150f 1px, transparent 1px, transparent 12px);
  z-index: 1;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}

.hero-text-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-badge {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  border-left: 2px solid var(--accent-red);
  padding-left: 12px;
  font-weight: 600;
}

.hero-text-side h1 {
  font-size: 3.4rem;
  line-height: 1.3;
  letter-spacing: 0.05em;
  color: var(--text-light);
}

.highlight-velour {
  display: inline-block;
  position: relative;
  margin-top: 8px;
  padding: 4px 8px;
}

.highlight-velour::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(153, 27, 27, 0.5);
  z-index: -1;
  border-left: 3px solid var(--accent-gold);
  transform: skewX(-10deg);
}

.highlight-text {
  color: var(--accent-gold);
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.hero-text-side p {
  font-size: 1.05rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.hero-visual-side {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-window-wrapper {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-premium), 0 0 40px rgba(217, 119, 6, 0.1);
  border: 1px solid var(--border-color);
}

.amber-light-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.25) 0%, transparent 60%);
  z-index: 5;
  pointer-events: none;
}

.hero-window-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.window-overlay-tag {
  position: absolute;
  bottom: 24px;
  left: 24px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  background-color: rgba(41, 26, 16, 0.9);
  border: 1px solid var(--accent-gold);
  padding: 8px 16px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}

.window-overlay-tag .tag-title {
  font-family: var(--font-serif);
  color: var(--text-light);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
}

.window-overlay-tag .tag-sub {
  font-size: 0.65rem;
  color: var(--accent-gold);
  letter-spacing: 0.05em;
}

/* アニメーションキーフレーム */
@keyframes flameWobble {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.85; }
  50% { transform: scale(1.05) rotate(2deg); opacity: 1; filter: drop-shadow(0 0 5px var(--accent-gold)); }
}

@keyframes steamRise {
  0% { transform: translate(0, 15px) scale(0.9); opacity: 0.02; }
  50% { opacity: 0.2; }
  100% { transform: translate(-10px, -45px) scale(1.15); opacity: 0; }
}

.lamp-flame {
  animation: flameWobble 3s infinite ease-in-out;
  transform-origin: center bottom;
}

.steam-1 { animation: steamRise 5s infinite linear; transform-origin: center bottom; }
.steam-2 { animation: steamRise 6s infinite linear 2.5s; transform-origin: center bottom; }

/* セクション共通見出し */
.section-header {
  margin-bottom: 50px;
}

.section-subtitle {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--accent-gold);
  display: block;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 2.3rem;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 2px;
  background-color: var(--accent-gold);
}

.section-header p {
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* こだわりセクション (アコーディオン) */
.about-section {
  padding: 90px 0;
  background-color: var(--bg-panel);
}

.principles-accordion {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.principle-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.principle-item:hover {
  border-color: rgba(217, 119, 6, 0.3);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.principle-header {
  width: 100%;
  display: flex;
  align-items: center;
  padding: 24px 28px;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  text-align: left;
  gap: 20px;
}

.principle-num {
  font-size: 1.3rem;
  color: var(--accent-gold);
  font-weight: 700;
}

.principle-header h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-light);
  flex-grow: 1;
}

.toggle-arrow {
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

/* 展開トグル時のスタイル */
.principle-header[aria-expanded="true"] {
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(217, 119, 6, 0.02);
}

.principle-header[aria-expanded="true"] .toggle-arrow {
  transform: rotate(180deg);
  color: var(--accent-gold);
}

.principle-content {
  transition: height 0.3s ease;
}

/* until-found 対応 */
.principle-content:not([hidden]) {
  display: block;
}

.principle-inner {
  padding: 28px;
  background-color: rgba(41, 26, 16, 0.3);
}

.principle-inner p {
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.principle-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: var(--bg-input);
  padding: 16px 20px;
  border-radius: 4px;
  border-left: 3px solid var(--accent-red);
}

.principle-specs span {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}

/* お品書きセクション (タブ) */
.menu-section {
  padding: 90px 0;
}

.menu-tabs-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.menu-tab-list {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.menu-tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.05rem;
  font-family: var(--font-serif);
  font-weight: 700;
  padding: 10px 20px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border-radius: 4px;
}

.menu-tab-btn:hover {
  color: var(--text-light);
  background-color: rgba(255, 255, 255, 0.02);
}

.menu-tab-btn.active {
  color: var(--accent-gold);
  background-color: rgba(217, 119, 6, 0.08);
  border: 1px solid var(--accent-gold);
}

/* タブパネル表示 */
.menu-panel {
  display: none;
  outline: none;
}

.menu-panel:not([hidden]) {
  display: block;
}

.menu-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.menu-card {
  display: flex;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  transition: var(--transition-smooth);
}

.menu-card:hover {
  transform: translateY(-2px);
  border-color: rgba(217, 119, 6, 0.25);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.menu-card.card-featured {
  border-left: 4px solid var(--accent-gold);
}

.menu-visual {
  width: 180px;
  min-width: 180px;
  background-color: var(--bg-panel);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-right: 1px solid var(--border-color);
}

.menu-badge-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background-color: var(--accent-red);
  color: var(--text-light);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 2px;
  border: 1px solid var(--accent-gold);
}

.menu-item-svg {
  width: 120px;
  height: 90px;
}

.menu-info {
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-grow: 1;
}

.menu-info h3 {
  font-size: 1.3rem;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.menu-price {
  font-size: 1.25rem;
  color: var(--accent-gold);
  font-weight: 700;
}

.menu-price .tax-in {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
}

.menu-desc {
  font-size: 0.9rem;
}

.menu-card-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.option-info {
  font-size: 0.8rem;
  color: var(--accent-gold);
  font-weight: 600;
}

.btn-takeout-link {
  display: inline-flex;
  align-items: center;
  color: var(--accent-gold);
  font-weight: 700;
  font-size: 0.85rem;
}

.btn-takeout-link::after {
  content: ' →';
  transition: transform 0.2s ease;
}

.btn-takeout-link:hover::after {
  transform: translateX(3px);
}

/* お席・個室のご案内 */
.rooms-section {
  padding: 90px 0;
  background-color: var(--bg-panel);
}

.rooms-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 40px;
}

.room-pane {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
}

.room-visual-art {
  width: 100%;
  aspect-ratio: 3/2;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.room-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.room-detail-info {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.room-detail-info h3 {
  font-size: 1.2rem;
  color: var(--text-light);
  border-left: 3px solid var(--accent-red);
  padding-left: 10px;
}

.room-detail-info p {
  font-size: 0.9rem;
}

/* 店舗アクセス */
.access-section {
  padding: 90px 0;
}

.access-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.access-info-pane {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.access-intro-text {
  font-size: 1rem;
}

.access-details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.access-details-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 10px;
}

.access-details-list li strong {
  color: var(--text-light);
  display: inline-block;
  width: 90px;
}

.access-map-pane {
  display: flex;
  justify-content: center;
}

.map-frame {
  width: 100%;
  max-width: 440px;
  aspect-ratio: 4/3;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  position: relative;
}

.map-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.map-btn-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(41, 26, 16, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-smooth);
}

.map-frame:hover .map-btn-overlay {
  opacity: 1;
}

/* 予約フォームセクション */
.booking-section {
  padding: 90px 0;
  background-color: var(--bg-panel);
  border-top: 1px solid var(--border-color);
}

.interactive-booking-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.guide-dialogue-pane {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 110px;
}

.live-status-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(22, 163, 74, 0.06);
  border: 1px solid var(--border-success);
  padding: 6px 12px;
  border-radius: 50px;
  width: fit-content;
}

.live-indicator {
  width: 7px;
  height: 7px;
  background-color: var(--border-success);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--border-success);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.live-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--border-success);
  font-weight: 700;
}

.dialogue-bubble-wrapper {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.avatar-calligraphy {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background-color: var(--accent-red);
  border: 1.5px solid var(--accent-gold);
  border-radius: 50%;
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 900;
  box-shadow: 0 4px 10px rgba(153, 27, 27, 0.2);
}

.dialogue-bubble {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 18px;
  position: relative;
  box-shadow: var(--shadow-premium);
}

.dialogue-bubble::before {
  content: '';
  position: absolute;
  top: 15px;
  left: -7px;
  width: 12px;
  height: 12px;
  background-color: var(--bg-card);
  border-left: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transform: rotate(45deg);
}

.bubble-text {
  font-size: 0.9rem;
  color: var(--text-light);
}

.booking-rules-card {
  background-color: rgba(217, 119, 6, 0.05);
  border: 1px dashed rgba(217, 119, 6, 0.25);
  padding: 20px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.booking-rules-card h4 {
  font-size: 0.95rem;
  color: var(--accent-gold);
}

.booking-rules-card p {
  font-size: 0.8rem;
  line-height: 1.5;
}

/* 予約フォーム詳細 */
.form-pane {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 32px;
  box-shadow: var(--shadow-premium);
}

.bell-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 必須マーク */
.required {
  font-size: 0.65rem;
  background-color: var(--accent-red);
  color: var(--text-light);
  padding: 1px 5px;
  border-radius: 2px;
  vertical-align: middle;
  margin-left: 6px;
  font-weight: 700;
  border: 1px solid var(--accent-gold);
}

.form-step-fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

.form-step-fieldset legend {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-light);
}

/* ラジオカードグリッド */
.purpose-selection-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.purpose-radio-card {
  cursor: pointer;
  position: relative;
}

.purpose-radio-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.purpose-card-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 20px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  transition: var(--transition-smooth);
}

.purpose-radio-card:hover .purpose-card-inner {
  border-color: rgba(217, 119, 6, 0.3);
}

.purpose-radio-card input[type="radio"]:checked + .purpose-card-inner {
  border-color: var(--accent-gold);
  background-color: rgba(153, 27, 27, 0.15);
}

.p-icon {
  font-size: 1.25rem;
}

.p-title {
  font-weight: 700;
  color: var(--text-light);
  font-size: 0.95rem;
}

.p-desc {
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   バニラCSSフォーム表示コントロール (:has() による動的切り替え)
   -------------------------------------------------------------------------- */

.form-dynamic-group,
.group-seat-only {
  display: none;
}

/* お席ご予約(seat_only)チェック時：席タイプセレクトのみ表示 */
.bell-form:has(input[name="purpose"][value="seat_only"]:checked) .group-seat-only {
  display: block;
}

/* お土産(takeout)チェック時：お土産選択セレクトのみ表示 */
.bell-form:has(input[name="purpose"][value="takeout"]:checked) .group-takeout-only {
  display: block;
}

/* プチ貸切(party_reserve)チェック時：お茶会プランセレクトのみ表示 */
.bell-form:has(input[name="purpose"][value="party_reserve"]:checked) .group-party-only {
  display: block;
}

/* 共通フィールド */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.field-group label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-light);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.bell-form input[type="text"],
.bell-form input[type="tel"],
.bell-form input[type="email"],
.bell-form input[type="datetime-local"],
.bell-form select,
.bell-form textarea {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-light);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition-smooth);
  appearance: none;
}

/* セレクト矢印カスタム */
.field-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a8a29e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 14px;
  padding-right: 40px;
}

.bell-form input:focus,
.bell-form select:focus,
.bell-form textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 8px rgba(217, 119, 6, 0.15);
}

.help-text {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.validation-status-icon {
  position: absolute;
  right: 16px;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  font-size: 0.8rem;
}

.error-message {
  font-size: 0.75rem;
  color: var(--accent-cherry);
  font-weight: 700;
  display: none;
}

/* --------------------------------------------------------------------------
   :has() と :user-invalid 連動バリデーション
   -------------------------------------------------------------------------- */

.field-group:has(:user-invalid) input,
.field-group:has(:user-invalid) select,
.field-group:has(:user-invalid) textarea {
  border-color: var(--border-error);
  background-color: rgba(185, 28, 28, 0.03);
}

.field-group:has(:user-invalid) .validation-status-icon::after {
  content: '⚠️';
  color: var(--border-error);
}

.field-group:has(:user-invalid) .error-message {
  display: block;
}

.field-group:has(:user-valid) input,
.field-group:has(:user-valid) select,
.field-group:has(:user-valid) textarea {
  border-color: var(--border-success);
}

.field-group:has(:user-valid) .validation-status-icon::after {
  content: '✓';
  color: var(--border-success);
}

/* JSフォールバック用 */
.field-group.has-error-fallback input,
.field-group.has-error-fallback select,
.field-group.has-error-fallback textarea {
  border-color: var(--border-error);
  background-color: rgba(185, 28, 28, 0.03);
}

.field-group.has-error-fallback .validation-status-icon::after {
  content: '⚠️';
  color: var(--border-error);
}

.field-group.has-error-fallback .error-message {
  display: block;
}

.field-group.has-success-fallback input,
.field-group.has-success-fallback select,
.field-group.has-success-fallback textarea {
  border-color: var(--border-success);
}

.field-group.has-success-fallback .validation-status-icon::after {
  content: '✓';
  color: var(--border-success);
}

/* 送信ボタン */
.form-submit-wrapper {
  margin-top: 8px;
}

.btn-submit {
  width: 100%;
  padding: 15px;
  font-size: 1.05rem;
  background-color: var(--accent-red);
  color: var(--text-light);
  border: 1px solid var(--accent-gold);
  border-radius: 4px;
  box-shadow: 0 4px 15px rgba(153, 27, 27, 0.3);
  position: relative;
}

.btn-submit:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(153, 27, 27, 0.5);
  background-color: var(--accent-gold);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ローディングスピナー */
.spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--text-light);
  animation: spin 1s ease-in-out infinite;
  position: absolute;
  right: 24px;
}

.btn-submit.loading .spinner {
  display: block;
}

.btn-submit.loading .btn-text {
  opacity: 0.8;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 成功メッセージ */
.form-success-box {
  background-color: rgba(22, 163, 74, 0.08);
  border: 1px solid var(--border-success);
  padding: 24px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  margin-top: 8px;
  animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.success-icon {
  width: 44px;
  height: 44px;
  background-color: var(--border-success);
  color: var(--text-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(22, 163, 74, 0.2);
}

.form-success-box h3 {
  font-size: 1.25rem;
  color: var(--text-light);
}

.form-success-box p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-light);
}

/* フッター */
.main-footer {
  background-color: #170e09;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 24px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  font-size: 1.35rem;
  font-weight: 700;
  font-family: var(--font-serif);
}

.footer-brand .accent-text {
  color: var(--accent-gold);
}

.footer-tagline {
  font-size: 0.85rem;
}

.footer-nav ul {
  display: flex;
  list-style: none;
  gap: 20px;
}

.footer-nav a {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.02);
  width: 100%;
}

.footer-bottom p {
  font-size: 0.7rem;
}

/* --------------------------------------------------------------------------
   スクロールアニメーション (Progressive Enhancement)
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    @keyframes scrollFadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .scroll-trigger {
      animation: scrollFadeIn auto linear forwards;
      animation-timeline: view();
      animation-range: entry 10% entry 30%;
    }
  }
}

/* --------------------------------------------------------------------------
   レスポンシブ対応
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 36px;
  }
  
  .hero-text-side {
    align-items: center;
  }
  
  .hero-text-side h1 {
    font-size: 2.6rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .rooms-layout {
    grid-template-columns: 1fr;
  }
  
  .access-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .interactive-booking-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .guide-dialogue-pane {
    position: static;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .hero-text-side h1 {
    font-size: 2rem;
  }
  
  .menu-tab-list {
    flex-wrap: wrap;
  }
  
  .menu-card {
    flex-direction: column;
  }
  
  .menu-visual {
    width: 100%;
    height: 120px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .form-pane {
    padding: 20px;
  }
}