/* Google Fonts インポート */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

/* デザインシステムトークン（変数定義） */
:root {
  --font-primary: 'Plus Jakarta Sans', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* ライトテーマ用カラー */
  --bg-primary: #f0f7f6;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e6f2f0;
  
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 191, 165, 0.15);
  --glass-shadow: rgba(0, 191, 165, 0.06);
  
  --text-primary: #1c2d2a;
  --text-secondary: #4d605c;
  --text-muted: #839793;
  
  --primary: #00a896;
  --primary-hover: #02c39a;
  --primary-light: #e0f2f1;
  --accent: #f77f00;
  --danger: #e63946;
  --success: #2a9d8f;
  
  /* 各カテゴリのバッジカラー */
  --cat-vital: #0288d1;
  --cat-endocrine: #9c27b0;
  --cat-nursing: #4caf50;
  --cat-respiratory: #009688;
  --cat-neuro: #e65100;
  --cat-exam: #607d8b;
  --cat-infection: #d32f2f;
  --cat-rehab: #795548;
  --cat-default: #00a896;

  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.15s ease;
  --border-radius-lg: 20px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;
}

/* ダークテーマ用カラー */
[data-theme="dark"] {
  --bg-primary: #0d1614;
  --bg-secondary: #142320;
  --bg-tertiary: #1b2e2a;
  
  --glass-bg: rgba(20, 35, 32, 0.8);
  --glass-border: rgba(0, 191, 165, 0.25);
  --glass-shadow: rgba(0, 0, 0, 0.4);
  
  --text-primary: #e0f2f1;
  --text-secondary: #a3b8b4;
  --text-muted: #617874;
  
  --primary: #02c39a;
  --primary-hover: #00a896;
  --primary-light: rgba(2, 195, 154, 0.15);
  --accent: #ffb703;
  --danger: #e63946;
  --success: #2a9d8f;
}

/* 基本リセット & 共通スタイル */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* スクロールバーのカスタマイズ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* アプリ全体のレイアウト */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 1600px;
  margin: 0 auto;
  position: relative;
}

/* ヘッダー */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 100;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1.25rem;
  box-shadow: 0 4px 10px rgba(0, 168, 150, 0.3);
}

.logo-text h1 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* テーマ切り替えボタン */
.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.theme-toggle-btn:hover {
  transform: scale(1.05);
  border-color: var(--primary);
  background: var(--primary-light);
}

/* メインコンテンツレイアウト (PC版: 2カラム) */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* 左側ペイン (検索と一覧) */
.sidebar-pane {
  width: 380px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--glass-border);
  background: var(--bg-secondary);
  transition: var(--transition-smooth);
  z-index: 10;
}

/* 右側ペイン (詳細表示) */
.detail-pane {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start; /* Fix vertical scrolling cut-off */
}

/* 検索エリア */
.search-box-wrapper {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--glass-border);
}

.search-input-container {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: var(--border-radius-md);
  padding: 0.5rem 1rem;
  transition: var(--transition-smooth);
}

.search-input-container:focus-within {
  border-color: var(--primary);
  background: var(--bg-secondary);
  box-shadow: 0 0 10px rgba(0, 168, 150, 0.15);
}

.search-input-container svg {
  color: var(--text-muted);
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font-primary);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.voice-search-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.voice-search-btn:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.voice-search-btn.listening {
  color: var(--danger);
  animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(230, 57, 70, 0.2); }
  100% { transform: scale(1); }
}

/* タブメニュー */
.tab-container {
  display: flex;
  border-bottom: 1px solid var(--glass-border);
  background: var(--bg-secondary);
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.75rem 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
  border-bottom: 3px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.tab-btn svg {
  width: 18px;
  height: 18px;
}

.tab-btn:hover {
  color: var(--primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 700;
}

/* リスト・スクロールエリア */
.list-scroll-area {
  flex: 1;
  overflow-y: auto;
  position: relative;
}

/* カテゴリインデックス (各科) */
.category-index-bar {
  display: flex;
  overflow-x: auto;
  background: var(--bg-tertiary);
  padding: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
  gap: 0.5rem;
  scrollbar-width: none; /* Firefox用 */
  -webkit-overflow-scrolling: touch;
}

.category-index-bar::-webkit-scrollbar {
  display: none; /* Chrome/Safari用 */
}

.category-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition-fast);
}

.category-btn:hover, .category-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* アルファベットインデックス (A-Z) */
.az-index-bar {
  display: flex;
  overflow-x: auto;
  background: var(--bg-tertiary);
  padding: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
  gap: 0.25rem;
  scrollbar-width: none; /* Firefox用 */
}

.az-index-bar::-webkit-scrollbar {
  display: none; /* Chrome/Safari用 */
}

.az-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.25rem 0.6rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.az-btn:hover, .az-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* リストアイテム */
.term-list-item {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}

.term-list-item:hover {
  background: var(--bg-tertiary);
}

.term-list-item.selected {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
}

.term-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.25rem;
}

.term-abbrev {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.term-category-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  color: white;
}

.term-jp {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.term-en-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 空状態の表示 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
}

.empty-state svg {
  margin-bottom: 1rem;
  color: var(--text-muted);
  opacity: 0.5;
}

/* 詳細表示エリア（初期状態） */
.detail-welcome-state {
  margin: auto; /* Centering while scrollable */
  text-align: center;
  max-width: 400px;
}

.detail-welcome-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.detail-welcome-state h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.detail-welcome-state p {
  color: var(--text-muted);
}

/* 詳細カード表示 */
.detail-card {
  margin: auto 0; /* Centering while scrollable */
  width: 100%;
  max-width: 800px;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  box-shadow: 0 10px 30px var(--glass-shadow);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  animation: fade-in 0.3s ease-out;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 2px solid var(--glass-border);
  padding-bottom: 1.25rem;
}

.detail-title-section {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.detail-badge-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.detail-term {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.detail-jp-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.detail-kana {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.detail-en {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
}

.detail-actions {
  display: flex;
  gap: 0.75rem;
}

.action-icon-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.action-icon-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.action-icon-btn.bookmarked {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* 解説ブロック */
.info-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.section-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label svg {
  color: var(--primary);
}

.explanation-text {
  font-size: 1.05rem;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  padding: 1.25rem;
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--primary);
}

/* 看護のポイント（最重要ハイライト） */
.nursing-points-card {
  background: linear-gradient(135deg, var(--bg-tertiary), rgba(0, 168, 150, 0.05));
  border: 1px solid rgba(0, 168, 150, 0.2);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.nursing-points-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--primary);
}

.nursing-points-content {
  font-size: 0.95rem;
  color: var(--text-primary);
  white-space: pre-line; /* 改行を有効にする */
}

/* 新規用語追加モーダル */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  width: 90%;
  max-width: 500px;
  max-height: 85vh; /* 画面の高さを超えないようにする */
  overflow-y: auto; /* はみ出した分はスクロール可能にする */
  padding: 1.5rem; /* モバイルでも見やすいようにパディングを少し調整 */
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 0.75rem;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.close-modal-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary);
  background: var(--bg-secondary);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  background: var(--glass-border);
}

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

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

/* ヘッダーアクションボタン用の基本スタイル */
.header-actions .btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  padding: 0.6rem 1.2rem;
}

/* トースト通知 */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  z-index: 2000;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.3s ease;
  pointer-events: none;
  font-weight: 500;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* === 完全レスポンシブデザイン（モバイル・タブレット対応） === */

/* 中画面（PC縮小・タブレット: ~1024px） */
@media (max-width: 1024px) {
  .sidebar-pane {
    width: 320px; /* Narrower sidebar to fit on smaller screens */
  }
  
  .tab-btn {
    font-size: 0.75rem; /* Shrink font size slightly for 5 tabs */
    padding: 0.6rem 0.25rem;
  }
  
  .detail-card {
    padding: 2rem;
  }
  
  .detail-term {
    font-size: 2.2rem;
  }
}

/* スマホ・ナロー画面対応（~850px） */
@media (max-width: 850px) {
  header {
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }
  
  .logo-section {
    min-width: 0;
    flex: 1;
  }

  .logo-text {
    min-width: 0;
  }

  .logo-text h1 {
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .logo-text p {
    display: none; /* サブタイトルを隠す */
  }

  /* ヘッダーアクションボタンをコンパクトな円形アイコンボタンにする */
  .header-actions .btn {
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
  }

  .header-actions .btn .btn-text {
    display: none;
  }

  .main-content {
    flex-direction: column;
    overflow: visible; /* モバイルでは全体の縦スクロールを許容 */
  }
  
  .sidebar-pane {
    width: 100%;
    height: calc(100vh - 65px - 56px); /* フッターナビゲーションがある場合 */
    flex: none;
    border-right: none;
  }

  .detail-pane {
    position: fixed;
    top: 65px; /* ヘッダーの高さ */
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: calc(100vh - 65px);
    z-index: 200;
    padding: 1rem;
    transform: translateX(100%); /* 初期は隠れている */
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    background: var(--bg-primary);
  }

  /* モバイルで詳細画面が開いているとき */
  .app-container.detail-open .detail-pane {
    transform: translateX(0);
  }
  
  /* モバイル用の詳細画面戻るボタン */
  .mobile-back-btn {
    display: flex !important;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 1rem;
    align-self: flex-start;
  }

  .detail-card {
    padding: 1.5rem;
    border-radius: var(--border-radius-md);
    gap: 1rem;
    box-shadow: none;
    border: none;
    background: transparent; /* モバイルではフラットにする */
    margin: 0; /* Reset centering margin in mobile view */
  }

  .detail-term {
    font-size: 2rem;
  }

  .detail-header {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }

  .detail-actions {
    justify-content: flex-start;
  }

  .empty-state {
    padding: 2rem 1rem;
  }
}

/* スマホ用に戻るボタンはPC/タブレットでは非表示 */
.mobile-back-btn {
  display: none;
}

/* 免責事項・使い方ボタンのスタイル */
.btn-warning {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 10px rgba(247, 127, 0, 0.2);
  transition: var(--transition-smooth);
}

.btn-warning:hover {
  background: #e07200;
  box-shadow: 0 4px 15px rgba(247, 127, 0, 0.4);
}

/* 目立つ免責事項カード */
.welcome-disclaimer-card {
  background: rgba(247, 127, 0, 0.06);
  border: 1px dashed var(--accent);
  border-radius: var(--border-radius-md);
  padding: 1.25rem;
  text-align: left;
  max-width: 450px;
  margin: 1.5rem auto 0 auto;
  box-shadow: 0 4px 12px rgba(247, 127, 0, 0.05);
  animation: pulse-border 2.5s infinite ease-in-out;
}

.disclaimer-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.welcome-disclaimer-card p {
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.welcome-disclaimer-card strong {
  color: var(--accent);
}

@keyframes pulse-border {
  0% { border-color: rgba(247, 127, 0, 0.6); box-shadow: 0 4px 12px rgba(247, 127, 0, 0.02); }
  50% { border-color: rgba(247, 127, 0, 1); box-shadow: 0 4px 12px rgba(247, 127, 0, 0.1); }
  100% { border-color: rgba(247, 127, 0, 0.6); box-shadow: 0 4px 12px rgba(247, 127, 0, 0.02); }
}