/* ベースレイアウト */
body {
  font-family: 'Segoe UI', sans-serif;
  margin: 2rem;
  background: #f9f9f9;
  color: #333;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ダークモード */
body.dark-mode {
  background: #1a1a1a;
  color: #e0e0e0;
}

h1 {
  text-align: center;
  margin-bottom: 2rem;
}

.container {
  max-width: 1400px;
  margin: auto;
}

/* ヘッダーコントロール */
.header-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  margin-bottom: 2rem;
}

.header-controls h1 {
  margin: 0;
  flex-grow: 1;
}

.control-buttons {
  display: flex;
  gap: 0.5rem;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}

.control-button {
  background: none;
  border: 2px solid #ddd;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.control-button:hover {
  background: #f0f0f0;
  transform: scale(1.1);
}

body.dark-mode .control-button {
  border-color: #555;
  color: #e0e0e0;
}

body.dark-mode .control-button:hover {
  background: #333;
}

body.dark-mode .dark-mode-toggle {
  color: #ffd700;
}

/* 入力セクション */
.input-section {
  text-align: center;
  margin-bottom: 2rem;
}

.input-section label {
  cursor: help;
  border-bottom: 1px dotted #666;
}

.input-section input {
  font-size: 1rem;
  padding: 0.4rem;
  width: 400px;
  max-width: 90%;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  color: #333;
  transition: all 0.3s ease;
}

body.dark-mode .input-section input {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

body.dark-mode .input-section input:focus {
  border-color: #777;
  background: #333;
}

.input-section button {
  font-size: 1rem;
  padding: 0.5rem 1rem;
  margin-left: 0.5rem;
  cursor: pointer;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  color: #333;
  transition: all 0.3s ease;
}

body.dark-mode .input-section button {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

body.dark-mode .input-section button:hover {
  background: #3d3d3d;
  border-color: #777;
}

.input-section button:disabled {
  background-color: #f0f0f0;
  color: #999;
  cursor: not-allowed;
  opacity: 0.6;
}

body.dark-mode .input-section button:disabled {
  background-color: #1a1a1a;
  color: #666;
  border-color: #333;
}

.copy-btn {
  display: block;
  margin: 0 auto 1rem auto;
  background: #f0f8ff;
  border: 2px solid #4a90e2;
  color: #4a90e2;
  font-weight: bold;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  background: #4a90e2;
  color: white;
}

body.dark-mode .copy-btn {
  background: #2d3e4f;
  border-color: #5a9fd4;
  color: #a8c8ec;
}

body.dark-mode .copy-btn:hover {
  background: #5a9fd4;
  color: #1a1a1a;
}

/* エクスポートセクション */
.export-section {
  text-align: center;
  margin-top: 2rem;
  padding: 1.5rem;
  border-top: 2px solid #e0e0e0;
}

body.dark-mode .export-section {
  border-top-color: #444;
}

/* エクスポートドロップダウン */
.export-dropdown {
  position: relative;
  display: inline-block;
  margin-left: 0.5rem;
}

.export-btn {
  display: inline-block;
  background: #e8f5e8;
  border: 2px solid #4caf50;
  color: #2e7d32;
  font-weight: bold;
  transition: all 0.2s ease;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
}

.export-btn:hover {
  background: #4caf50;
  color: white;
}

body.dark-mode .export-btn {
  background: #1e3a1e;
  border-color: #66bb6a;
  color: #a5d6a7;
}

body.dark-mode .export-btn:hover {
  background: #66bb6a;
  color: #1a1a1a;
}

.export-btn:disabled {
  background-color: #f0f0f0;
  color: #999;
  border-color: #ddd;
  cursor: not-allowed;
  opacity: 0.6;
}

body.dark-mode .export-btn:disabled {
  background-color: #1a1a1a;
  color: #666;
  border-color: #333;
}

.export-options {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  min-width: 160px;
  display: none;
}

.export-dropdown:hover .export-options {
  display: block;
}

.export-option {
  display: block;
  width: 100%;
  padding: 0.6rem 1rem;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-size: 0.9rem;
}

.export-option:hover {
  background-color: #f5f5f5;
}

.export-option:first-child {
  border-radius: 8px 8px 0 0;
}

.export-option:last-child {
  border-radius: 0 0 8px 8px;
}

body.dark-mode .export-options {
  background: #333;
  border-color: #555;
}

body.dark-mode .export-option {
  color: #e0e0e0;
}

body.dark-mode .export-option:hover {
  background-color: #444;
}

/* ビット列の表示 */
.bit-display {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bit-row-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.bit-row h2 {
  margin: 0;
  flex-grow: 1;
}

.bit-buttons {
  display: flex;
  gap: 0.5rem;
}

.copy-bit-btn, .paste-bit-btn {
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #f8f8f8;
  cursor: pointer;
  transition: all 0.2s ease;
  color: #333;
}

body.dark-mode .copy-bit-btn, body.dark-mode .paste-bit-btn {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

.copy-bit-btn:hover, .paste-bit-btn:hover {
  background: #e8e8e8;
  border-color: #999;
}

body.dark-mode .copy-bit-btn:hover, body.dark-mode .paste-bit-btn:hover {
  background: #3d3d3d;
  border-color: #777;
}

.copy-bit-btn:active, .paste-bit-btn:active {
  transform: translateY(1px);
}

.paste-bit-btn {
  background: #fff8e1;
  border-color: #ffb74d;
  color: #e65100;
}

body.dark-mode .paste-bit-btn {
  background: #4d3d1a;
  border-color: #ff9800;
  color: #ffb74d;
}

.paste-bit-btn:hover {
  background: #ffecb3;
  border-color: #ff9800;
}

body.dark-mode .paste-bit-btn:hover {
  background: #5d4d2a;
  border-color: #ffa726;
}

.bit-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

/* 8ビットのグループ */
.bit-group {
  display: inline-flex;
  gap: 0.4rem;
  flex-shrink: 0;
}

.bit {
  display: inline-block;
  width: 24px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  font-size: 1.2rem;
  font-weight: bold;
  border: 1px solid #aaa;
  border-radius: 4px;
  background: #fff;
  transition: all 0.4s ease;
}

body.dark-mode .bit {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

/* 状態別クラス */
.bit.plain {
  background: #d0eaff;
}

body.dark-mode .bit.plain {
  background: #1a3d5c;
  color: #a8c8ec;
}

.bit.key {
  background: #ffe0cc;
}

body.dark-mode .bit.key {
  background: #5c3d1a;
  color: #f4a261;
}

.bit.cipher {
  background: #d8ffd6;
}

body.dark-mode .bit.cipher {
  background: #1a5c1a;
  color: #a5d6a7;
}

/* アクティブ（処理中）のビット - 平文用 */
.bit.plain.active {
  animation: strongPulseAnim 0.5s ease-out;
  box-shadow: 0 0 20px rgba(0, 150, 255, 1), 0 0 40px rgba(0, 150, 255, 0.6);
  border-color: #0096ff;
  border-width: 3px;
  background: #a0d8ff;
  transform: scale(1.15);
}

/* アクティブ（処理中）のビット - 鍵用 */
.bit.key.active {
  animation: pulseAnim 0.3s ease-out;
  box-shadow: 0 0 15px rgba(255, 102, 0, 0.8);
  border-color: #ff6600;
  border-width: 2px;
}

/* 🔥 アニメーション：鍵ビットが使われると「燃える」 */
.bit.burn {
  animation: burnAnim 0.6s ease-out forwards;
}

.bit.ash {
  background: #ccc;
  color: #666;
  transform: scale(0.8);
  opacity: 0.5;
  font-weight: normal;
}

/* ✨ アニメーション：暗号ビットが現れる */
.bit.appear {
  animation: appearAnim 0.3s ease-out;
  box-shadow: 0 0 15px rgba(0, 255, 0, 0.8);
  border-color: #00ff00;
  border-width: 2px;
}

/* キーフレーム定義 */
@keyframes burnAnim {
  0% {
    background: #ffe0cc;
    color: #333;
    transform: scale(1);
  }
  50% {
    background: #ff3d00;
    color: #fff;
    transform: scale(1.2) rotate(5deg);
  }
  100% {
    background: #ccc;
    color: #666;
    transform: scale(0.8);
    opacity: 0.5;
  }
}

@keyframes appearAnim {
  from {
    transform: scale(0.5);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes pulseAnim {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

@keyframes strongPulseAnim {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
  100% {
    transform: scale(1.15);
    opacity: 1;
  }
}

/* エラーメッセージ */
.error-message {
  color: red;
  font-size: 0.9rem;
  margin-top: 0.3rem;
}

/* アニメーションコントロール */
.animation-controls {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin: 1.5rem 0;
  padding: 1rem;
  background: #f5f5f5;
  border-radius: 8px;
  transition: background-color 0.3s ease;
}

body.dark-mode .animation-controls {
  background: #2d2d2d;
}

.control-group {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.control-btn {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: white;
  cursor: pointer;
  transition: all 0.2s ease;
  color: #333;
}

body.dark-mode .control-btn {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

.control-btn:hover {
  background: #f0f0f0;
  border-color: #999;
}

body.dark-mode .control-btn:hover {
  background: #3d3d3d;
  border-color: #777;
}

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

.control-btn:disabled {
  background-color: #f0f0f0;
  color: #999;
  cursor: not-allowed;
  opacity: 0.6;
  border-color: #ddd;
}

body.dark-mode .control-btn:disabled {
  background-color: #1a1a1a;
  color: #666;
  border-color: #333;
}

.control-btn:disabled:hover {
  background-color: #f0f0f0;
  color: #999;
  border-color: #ddd;
  transform: none;
}

body.dark-mode .control-btn:disabled:hover {
  background-color: #1a1a1a;
  color: #666;
  border-color: #333;
  transform: none;
}

.reset-btn {
  background: #ffe6e6;
  border-color: #ffb3b3;
  color: #cc0000;
}

body.dark-mode .reset-btn {
  background: #4d1a1a;
  border-color: #cc6666;
  color: #ff9999;
}

.reset-btn:hover {
  background: #ffb3b3;
  color: white;
}

body.dark-mode .reset-btn:hover {
  background: #cc6666;
  color: #1a1a1a;
}

.complete-btn {
  background: #e6ffe6;
  border-color: #b3ffb3;
  color: #006600;
}

body.dark-mode .complete-btn {
  background: #1a4d1a;
  border-color: #66cc66;
  color: #99ff99;
}

.complete-btn:hover {
  background: #b3ffb3;
  color: white;
}

body.dark-mode .complete-btn:hover {
  background: #66cc66;
  color: #1a1a1a;
}

.speed-label {
  font-size: 0.9rem;
  color: #666;
  margin-right: 0.5rem;
}

.speed-select {
  padding: 0.3rem 0.5rem;
  font-size: 0.8rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: white;
  color: #333;
  transition: all 0.3s ease;
}

body.dark-mode .speed-select {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

.progress-indicator {
  font-size: 0.9rem;
  font-weight: bold;
  color: #666;
  margin-left: 1rem;
}

/* プレースホルダビット */
.bit.placeholder {
  background: #eee;
  color: #bbb;
  border-style: dashed;
}

body.dark-mode .bit.placeholder {
  background: #222;
  color: #666;
  border-color: #444;
}

/* タブスタイル */
.tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid #ddd;
  padding-bottom: 0;
  transition: border-color 0.3s ease;
}

body.dark-mode .tabs {
  border-bottom-color: #555;
}

.tab-button {
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.3s ease;
  color: #666;
}

body.dark-mode .tab-button {
  color: #aaa;
}

.tab-button:hover {
  color: #333;
}

body.dark-mode .tab-button:hover {
  color: #ddd;
}

.tab-button.active {
  color: #ff6600;
  border-bottom-color: #ff6600;
  font-weight: bold;
}

body.dark-mode .tab-button.active {
  color: #ff8c42;
  border-bottom-color: #ff8c42;
}

.tab-content {
  margin-top: 2rem;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* トースト通知 */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 1rem 1.5rem;
  background: #333;
  color: white;
  border-radius: 6px;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(-20px);
  transition: all 0.3s ease;
  z-index: 1000;
  max-width: 300px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

body.dark-mode .toast {
  background: #555;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

.toast.success {
  background: #4caf50;
}

body.dark-mode .toast.success {
  background: #388e3c;
}

.toast.error {
  background: #f44336;
}

body.dark-mode .toast.error {
  background: #d32f2f;
}

/* フッター */
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #ddd;
  text-align: center;
  font-size: 0.9rem;
  color: #777;
  transition: all 0.3s ease;
}

body.dark-mode footer {
  border-top-color: #555;
  color: #aaa;
}

body.dark-mode footer a {
  color: #66bb6a;
}

body.dark-mode footer a:hover {
  color: #81c784;
}

/* モーダルスタイル */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.3s ease-out;
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-content {
  background: #fff;
  border-radius: 12px;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  animation: slideIn 0.3s ease-out;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

body.dark-mode .modal-content {
  background: #2d2d2d;
  color: #e0e0e0;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid #eee;
  flex-shrink: 0;
}

body.dark-mode .modal-header {
  border-bottom-color: #444;
}

.modal-header h2 {
  margin: 0;
  color: #333;
  font-size: 1.5rem;
}

body.dark-mode .modal-header h2 {
  color: #e0e0e0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: #999;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: #f0f0f0;
  color: #666;
}

body.dark-mode .modal-close {
  color: #aaa;
}

body.dark-mode .modal-close:hover {
  background: #444;
  color: #ddd;
}

.modal-body {
  padding: 2rem;
  overflow-y: auto;
  flex-grow: 1;
  line-height: 1.6;
}

.modal-footer {
  padding: 1rem 2rem;
  border-top: 1px solid #eee;
  text-align: center;
  flex-shrink: 0;
  background: #f9f9f9;
}

body.dark-mode .modal-footer {
  border-top-color: #444;
  background: #2a2a2a;
}

.help-section {
  margin-bottom: 2rem;
}

.help-section:last-child {
  margin-bottom: 0;
}

.help-section h3 {
  color: #ff6600;
  margin-bottom: 1rem;
  font-size: 1.2rem;
  border-bottom: 2px solid #ff6600;
  padding-bottom: 0.5rem;
}

body.dark-mode .help-section h3 {
  color: #ff8c42;
  border-bottom-color: #ff8c42;
}

.help-section ul, .help-section ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.help-section li {
  margin-bottom: 0.5rem;
}

.help-section code {
  background: #f4f4f4;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.9rem;
}

body.dark-mode .help-section code {
  background: #404040;
  color: #e0e0e0;
}

.help-section kbd {
  background: #f7f7f7;
  border: 1px solid #ccc;
  border-radius: 3px;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
  padding: 0.2rem 0.4rem;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.8rem;
}

body.dark-mode .help-section kbd {
  background: #404040;
  border-color: #666;
  color: #e0e0e0;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1);
}

.help-note {
  background: #fff3cd;
  border: 1px solid #ffeaa7;
  border-radius: 6px;
  padding: 1rem;
  margin-top: 1rem;
  color: #856404;
}

body.dark-mode .help-note {
  background: #4d3d1a;
  border-color: #b8860b;
  color: #ffd700;
}

/* OTP実験室のスタイル */
.lab-introduction {
  text-align: center;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  color: white;
}

.lab-introduction h2 {
  margin: 0 0 1rem 0;
  font-size: 2rem;
}

.lab-introduction p {
  margin: 0.5rem 0;
  font-size: 1.1rem;
  opacity: 0.9;
}

.experiment-section {
  margin: 2rem 0;
  padding: 1.5rem;
  border: 2px solid #e0e0e0;
  border-radius: 12px;
  background: #fafafa;
  transition: all 0.3s ease;
}

.experiment-section:hover {
  border-color: #667eea;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.1);
}

/* アコーディオンヘッダー */
.accordion-header {
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.accordion-header:hover {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
  border-radius: 8px;
  margin: -0.5rem;
  padding: 0.5rem;
}

.accordion-header h3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 0.5rem 0;
  user-select: none;
}

.accordion-icon {
  font-size: 1rem;
  transition: transform 0.3s ease;
  color: #667eea;
  font-weight: bold;
}

.accordion-header.collapsed .accordion-icon {
  transform: rotate(-90deg);
}

/* アコーディオンコンテンツ */
.experiment-content {
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 3000px; /* 十分に大きな値 */
  opacity: 1;
}

.experiment-content.collapsed {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
  margin-bottom: 0;
}

body.dark-mode .accordion-header:hover {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

body.dark-mode .experiment-section {
  background: #2a2a2a;
  border-color: #444;
}

body.dark-mode .experiment-section:hover {
  border-color: #667eea;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.experiment-header h3 {
  margin: 0 0 0.5rem 0;
  color: #333;
  font-size: 1.4rem;
}

body.dark-mode .experiment-header h3 {
  color: #e0e0e0;
}

.experiment-header p {
  margin: 0 0 1rem 0;
  color: #666;
  font-size: 1rem;
}

body.dark-mode .experiment-header p {
  color: #ccc;
}

/* 実験1: ゲート構成 */
.gate-construction {
  display: grid;
  gap: 2rem;
}

.construction-theory {
  background: #f8f9ff;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #667eea;
}

body.dark-mode .construction-theory {
  background: #1a1a2e;
  border-left-color: #667eea;
}

.formula {
  text-align: center;
  margin: 1rem 0;
  padding: 1rem;
  background: white;
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

body.dark-mode .formula {
  background: #333;
}

.formula code {
  font-size: 1.2rem;
  font-weight: bold;
  color: #667eea;
}

.gate-simulator {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

body.dark-mode .gate-simulator {
  background: #333;
}

.input-controls {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  align-items: center;
}

.gate-input {
  padding: 0.5rem;
  font-size: 1rem;
  border: 2px solid #ddd;
  border-radius: 4px;
  background: white;
}

body.dark-mode .gate-input {
  background: #444;
  border-color: #666;
  color: #e0e0e0;
}

.gate-diagram-complex {
  margin: 2rem 0;
  text-align: center;
}

.construction-svg {
  max-width: 100%;
  height: auto;
  overflow: visible; /* ハイライト時の拡大によるはみ出しを許可 */
}

/* SVGコンテナにパディングを追加してはみ出しに対応 */
.gate-diagram-complex {
  padding: 10px;
  overflow: visible;
}

/* ダークモード時のSVG要素は JavaScript側で動的に制御するため、
   line要素の色指定を削除し、他の要素のみ対応 */
body.dark-mode .construction-svg path,
body.dark-mode .construction-svg rect,
body.dark-mode .construction-svg circle {
  stroke: #e0e0e0;
}

/* ダークモード時のSVGテキスト要素の色調整 */
/* 動的制御されないテキスト要素（ゲート名、式説明）のみ対象 */
body.dark-mode .construction-svg text:not([id]) {
  fill: #e0e0e0 !important;
}

/* ダークモード時の式背景ボックスの調整 */
body.dark-mode .construction-svg rect[fill="white"] {
  fill: #2a2a2a !important;
  stroke: #667eea !important;
}

.gate-results {
  margin-top: 2rem;
}

.result-table table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
}

.result-table th,
.result-table td {
  padding: 0.8rem;
  text-align: center;
  border: 1px solid #ddd;
}

/* 表のセルのホバー効果 */
.result-table td {
  cursor: pointer;
  transition: all 0.2s ease;
}

.result-table td:hover {
  background: #fff3cd;
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3);
  border-color: #ffc107;
  font-weight: bold;
}

body.dark-mode .result-table td:hover {
  background: #3d2a1a;
  border-color: #ff8c00;
  box-shadow: 0 2px 8px rgba(255, 140, 0, 0.3);
}

.result-table th {
  background: #f5f5f5;
  font-weight: bold;
}

body.dark-mode .result-table th {
  background: #444;
  color: #e0e0e0;
}

body.dark-mode .result-table th,
body.dark-mode .result-table td {
  border-color: #555;
  color: #e0e0e0;
}

.result-cell {
  background: #e8f5e8;
  font-weight: bold;
  color: #2d5016;
}

body.dark-mode .result-cell {
  background: #1a3d1a;
  color: #90ee90;
}

.construction-explanation {
  background: #f0f8ff;
  padding: 1rem;
  border-radius: 6px;
  border-left: 4px solid #4a90e2;
  white-space: pre-line;
}

body.dark-mode .construction-explanation {
  background: #1a1a3d;
  border-left-color: #4a90e2;
}

/* 実験2: 鍵の再利用 */
.key-reuse-demo {
  display: grid;
  gap: 2rem;
}

.demo-theory {
  background: #fff8e1;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #ff9800;
}

body.dark-mode .demo-theory {
  background: #3d2a1a;
  border-left-color: #ff9800;
}

.theory-formula {
  background: white;
  padding: 1.5rem;
  border-radius: 6px;
  margin: 1rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

body.dark-mode .theory-formula {
  background: #333;
}

.theory-formula code {
  display: block;
  margin: 0.5rem 0;
  font-size: 1.1rem;
  color: #e65100;
}

body.dark-mode .theory-formula code {
  color: #ff9800;
}

.warning-text {
  color: #d32f2f;
  font-weight: bold;
  margin-top: 1rem;
}

body.dark-mode .warning-text {
  color: #ff5252;
}

.reuse-simulator {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

body.dark-mode .reuse-simulator {
  background: #333;
}

.plaintext-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.demo-button {
  grid-column: 1 / -1;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.demo-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(238, 90, 36, 0.3);
}

.reuse-results {
  margin-top: 2rem;
}

.calculation-step {
  margin: 2rem 0;
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid #6c757d;
}

body.dark-mode .calculation-step {
  background: #2a2a2a;
  border-left-color: #6c757d;
}

.calculation-step h6 {
  margin: 0 0 1rem 0;
  color: #495057;
  font-size: 1.1rem;
}

body.dark-mode .calculation-step h6 {
  color: #e0e0e0;
}

.bit-display-small {
  margin: 1rem 0;
}

.bit-row-small {
  display: flex;
  align-items: center;
  margin: 0.5rem 0;
  gap: 1rem;
}

.bit-row-small .label {
  min-width: 120px;
  font-weight: bold;
  color: #495057;
  display: inline-block;
}

body.dark-mode .bit-row-small .label {
  color: #e0e0e0;
}

.bits {
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.9rem;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  background: #e9ecef;
}

body.dark-mode .bits {
  background: #444;
  color: #e0e0e0;
}

.bits.plain {
  background: #e8f5e8;
  color: #2d5016;
}

body.dark-mode .bits.plain {
  background: #1a3d1a;
  color: #90ee90;
}

.bits.key {
  background: #fff3e0;
  color: #e65100;
}

body.dark-mode .bits.key {
  background: #3d2a1a;
  color: #ff9800;
}

.bits.cipher {
  background: #e3f2fd;
  color: #0d47a1;
}

body.dark-mode .bits.cipher {
  background: #1a2a3d;
  color: #64b5f6;
}

.bits.attack {
  background: #ffebee;
  color: #c62828;
}

body.dark-mode .bits.attack {
  background: #3d1a1a;
  color: #ff5252;
}

.vulnerability-highlight {
  background: #ffebee;
  border: 2px solid #f44336;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1rem 0;
}

body.dark-mode .vulnerability-highlight {
  background: #3d1a1a;
  border-color: #f44336;
}

.vulnerability-highlight p {
  margin: 0.5rem 0;
  color: #c62828;
}

body.dark-mode .vulnerability-highlight p {
  color: #ff5252;
}

/* 実験3: 断片解析 */
.fragment-analysis {
  display: grid;
  gap: 2rem;
}

.analysis-theory {
  background: #f3e5f5;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #9c27b0;
}

body.dark-mode .analysis-theory {
  background: #2d1a3d;
  border-left-color: #9c27b0;
}

.theory-content {
  background: white;
  padding: 1.5rem;
  border-radius: 6px;
  margin: 1rem 0;
}

body.dark-mode .theory-content {
  background: #333;
}

.security-note {
  background: #e8f5e8;
  border: 1px solid #4caf50;
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
}

body.dark-mode .security-note {
  background: #1a3d1a;
  border-color: #4caf50;
}

.fragment-simulator {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

body.dark-mode .fragment-simulator {
  background: #333;
}

.scenario-setup {
  margin-bottom: 2rem;
}

.known-fragment {
  display: grid;
  grid-template-columns: auto 1fr auto 100px auto;
  gap: 1rem;
  align-items: center;
  margin: 1rem 0;
}

.verification {
  background: #e8f5e8;
  border: 1px solid #4caf50;
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
}

body.dark-mode .verification {
  background: #1a3d1a;
  border-color: #4caf50;
}

.security-implications {
  margin-top: 2rem;
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 8px;
}

body.dark-mode .security-implications {
  background: #2a2a2a;
}

.security-implications h6 {
  margin: 0 0 1rem 0;
  color: #495057;
}

body.dark-mode .security-implications h6 {
  color: #e0e0e0;
}

.security-implications ul {
  margin: 0;
  padding-left: 1.5rem;
}

.security-implications li {
  margin: 0.5rem 0;
  color: #6c757d;
}

body.dark-mode .security-implications li {
  color: #ccc;
}

/* 実験のまとめ */
.lab-conclusion {
  margin-top: 3rem;
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  color: white;
}

.lab-conclusion h3 {
  margin: 0 0 2rem 0;
  text-align: center;
  font-size: 1.8rem;
}

.conclusion-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.point {
  background: rgba(255, 255, 255, 0.1);
  padding: 1.5rem;
  border-radius: 8px;
  backdrop-filter: blur(10px);
}

.point h4 {
  margin: 0 0 1rem 0;
  font-size: 1.2rem;
}

.point p {
  margin: 0;
  opacity: 0.9;
  line-height: 1.6;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .plaintext-inputs {
    grid-template-columns: 1fr;
  }
  
  .input-controls {
    flex-direction: column;
    gap: 1rem;
  }
  
  .known-fragment {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .conclusion-points {
    grid-template-columns: 1fr;
  }
}

.modal-footer a {
  color: #4a90e2;
  text-decoration: none;
}

.modal-footer a:hover {
  text-decoration: underline;
}

body.dark-mode .modal-footer a {
  color: #66bb6a;
}

body.dark-mode .modal-footer a:hover {
  color: #81c784;
}

/* XORの基礎タブスタイル */
.xor-explanation {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1rem;
}

.xor-explanation h2 {
  text-align: center;
  color: #333;
  margin-bottom: 2rem;
}

body.dark-mode .xor-explanation h2 {
  color: #e0e0e0;
}

.explanation-section {
  margin-bottom: 3rem;
  background: #f9f9f9;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

body.dark-mode .explanation-section {
  background: #2d2d2d;
  color: #e0e0e0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.explanation-section h3 {
  color: #ff6600;
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
  border-bottom: 2px solid #ff6600;
  padding-bottom: 0.5rem;
}

body.dark-mode .explanation-section h3 {
  color: #ff8c42;
  border-bottom-color: #ff8c42;
}

.explanation-section p {
  line-height: 1.7;
  margin-bottom: 1rem;
  font-size: 1rem;
}

/* 真理値表 */
.truth-table-container {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
}

.truth-table {
  border-collapse: collapse;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body.dark-mode .truth-table {
  background: #1a1a1a;
  color: #e0e0e0;
}

.truth-table th {
  background: #ff6600;
  color: white;
  padding: 1rem;
  font-weight: bold;
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.3);
}

.truth-table th:last-child {
  border-right: none;
}

.truth-table th:nth-child(3) {
  min-width: 120px;
  width: 120px;
}

body.dark-mode .truth-table th {
  background: #ff8c42;
  border-right-color: rgba(255, 255, 255, 0.2);
}

.truth-table td {
  padding: 1rem;
  text-align: center;
  border-bottom: 1px solid #eee;
  border-right: 1px solid #eee;
}

.truth-table td:last-child {
  border-right: none;
}

.truth-table td:nth-child(3) {
  min-width: 120px;
  width: 120px;
}

body.dark-mode .truth-table td {
  border-bottom-color: #444;
  border-right-color: #444;
}

.truth-table tr:last-child td {
  border-bottom: none;
}

/* 真理値表の行ホバー効果 */
.truth-table tbody tr {
  transition: all 0.3s ease;
  cursor: pointer;
}

.truth-table tbody tr:hover {
  background: #fff3cd;
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
}

body.dark-mode .truth-table tbody tr:hover {
  background: #4d3d1a;
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.truth-table tbody tr:hover td {
  border-bottom-color: transparent;
  border-right-color: rgba(255, 193, 7, 0.5);
}

body.dark-mode .truth-table tbody tr:hover td {
  border-right-color: rgba(255, 215, 0, 0.5);
}

.truth-table tbody tr:hover td:last-child {
  border-right-color: transparent;
}

.truth-table tbody tr:hover .bit-cell {
  background: #ffecb3;
  transform: scale(1.1);
}

body.dark-mode .truth-table tbody tr:hover .bit-cell {
  background: #5d4d2a;
}

.truth-table tbody tr:hover .bit-cell.result {
  background: #c8e6c8;
  color: #1b5e20;
}

body.dark-mode .truth-table tbody tr:hover .bit-cell.result {
  background: #2e5d2e;
  color: #c8e6c8;
}

.bit-cell {
  font-family: 'Monaco', 'Consolas', monospace;
  font-weight: bold;
  font-size: 1.2rem;
  background: #f0f0f0;
  border-radius: 4px;
  width: 60px;
}

body.dark-mode .bit-cell {
  background: #404040;
}

.bit-cell.result {
  background: #e8f5e8;
  color: #2e7d32;
}

body.dark-mode .bit-cell.result {
  background: #1a4d1a;
  color: #a5d6a7;
}

/* 暗号例 */
.crypto-example {
  margin: 2rem 0;
}

.crypto-step {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: #fff;
  border-radius: 8px;
  border-left: 4px solid #ff6600;
}

body.dark-mode .crypto-step {
  background: #1a1a1a;
  border-left-color: #ff8c42;
}

.crypto-step h4 {
  margin: 0 0 1rem 0;
  color: #333;
  font-size: 1.1rem;
}

body.dark-mode .crypto-step h4 {
  color: #e0e0e0;
}

.bit-operation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  font-size: 1.5rem;
  font-family: 'Monaco', 'Consolas', monospace;
  margin: 1rem 0;
}

.operand {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: bold;
  min-width: 40px;
  text-align: center;
}

.operand.plain {
  background: #d0eaff;
  color: #1565c0;
}

body.dark-mode .operand.plain {
  background: #1a3d5c;
  color: #a8c8ec;
}

.operand.key {
  background: #ffe0cc;
  color: #e65100;
}

body.dark-mode .operand.key {
  background: #5c3d1a;
  color: #f4a261;
}

.operand.cipher {
  background: #d8ffd6;
  color: #2e7d32;
}

body.dark-mode .operand.cipher {
  background: #1a5c1a;
  color: #a5d6a7;
}

.operator, .equals {
  font-size: 1.8rem;
  font-weight: bold;
  color: #666;
}

body.dark-mode .operator, body.dark-mode .equals {
  color: #aaa;
}

.result {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: bold;
  min-width: 40px;
  text-align: center;
  border: 2px solid;
}

.key-point {
  background: #fff3cd;
  border: 1px solid #ffeaa7;
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 2rem;
  font-size: 1.1rem;
  text-align: center;
}

body.dark-mode .key-point {
  background: #4d3d1a;
  border-color: #b8860b;
  color: #ffd700;
}

.key-point code {
  background: #f8f9fa;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 1.2rem;
  color: #e83e8c;
  margin: 0 0.5rem;
}

body.dark-mode .key-point code {
  background: #404040;
  color: #ff79c6;
}

/* インタラクティブデモ */
.interactive-demo {
  background: #fff;
  border-radius: 12px;
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

body.dark-mode .interactive-demo {
  background: #1a1a1a;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.demo-inputs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.input-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.input-group label {
  font-weight: bold;
  color: #333;
  font-size: 1rem;
}

body.dark-mode .input-group label {
  color: #e0e0e0;
}

.bit-select {
  padding: 0.8rem 1.2rem;
  font-size: 1.2rem;
  font-family: 'Monaco', 'Consolas', monospace;
  font-weight: bold;
  border: 2px solid #ddd;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  transition: all 0.3s ease;
}

body.dark-mode .bit-select {
  background: #2d2d2d;
  border-color: #555;
  color: #e0e0e0;
}

.bit-select:focus {
  outline: none;
  border-color: #ff6600;
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2);
}

.operator-display, .equals-display {
  font-size: 2rem;
  font-weight: bold;
  color: #666;
  padding: 0.5rem;
}

body.dark-mode .operator-display, body.dark-mode .equals-display {
  color: #aaa;
}

.result-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.xor-result {
  background: #e8f5e8;
  color: #2e7d32;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  font-size: 2rem;
  font-family: 'Monaco', 'Consolas', monospace;
  font-weight: bold;
  border: 3px solid #4caf50;
  min-width: 60px;
  text-align: center;
  transition: all 0.3s ease;
}

body.dark-mode .xor-result {
  background: #1a4d1a;
  color: #a5d6a7;
  border-color: #66bb6a;
}

.demo-explanation {
  text-align: center;
  background: #f0f8ff;
  padding: 1rem;
  border-radius: 8px;
  font-size: 1.1rem;
}

body.dark-mode .demo-explanation {
  background: #1a2b3d;
  color: #a8c8ec;
}

.demo-explanation p {
  margin: 0;
  font-family: 'Monaco', 'Consolas', monospace;
  font-weight: bold;
}

/* 実用例リスト */
.explanation-section ul {
  list-style: none;
  padding: 0;
}

.explanation-section li {
  background: #fff;
  margin-bottom: 0.8rem;
  padding: 1rem;
  border-radius: 8px;
  border-left: 4px solid #ff6600;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

body.dark-mode .explanation-section li {
  background: #1a1a1a;
  border-left-color: #ff8c42;
  color: #e0e0e0;
}

/* ハードウェア関連スタイル */
.hardware-benefits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.benefit-item {
  background: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid #4caf50;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

body.dark-mode .benefit-item {
  background: #1a1a1a;
  border-left-color: #66bb6a;
  color: #e0e0e0;
}

.benefit-item h4 {
  margin: 0 0 1rem 0;
  color: #4caf50;
  font-size: 1.1rem;
}

body.dark-mode .benefit-item h4 {
  color: #66bb6a;
}

.benefit-item p {
  margin: 0;
  line-height: 1.6;
}

/* XORゲート表示 */
.xor-gate-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 2px solid #eee;
}

body.dark-mode .xor-gate-section {
  border-top-color: #444;
}

.logic-gate-display {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

.gate-diagram {
  flex-shrink: 0;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body.dark-mode .gate-diagram {
  background: #1a1a1a;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body.dark-mode .gate-diagram svg path,
body.dark-mode .gate-diagram svg line {
  stroke: #e0e0e0;
}

body.dark-mode .gate-diagram svg text {
  fill: #e0e0e0;
}

.gate-explanation {
  flex: 1;
  min-width: 250px;
}

/* 数学的性質 */
.mathematical-properties {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.property-item {
  background: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  border: 2px solid #e3f2fd;
  transition: all 0.3s ease;
}

body.dark-mode .property-item {
  background: #1a1a1a;
  border-color: #1a3d5c;
  color: #e0e0e0;
}

.property-item:hover {
  border-color: #2196f3;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(33, 150, 243, 0.2);
}

body.dark-mode .property-item:hover {
  border-color: #64b5f6;
  box-shadow: 0 4px 12px rgba(100, 181, 246, 0.2);
}

.property-item h4 {
  margin: 0 0 0.5rem 0;
  color: #2196f3;
  font-size: 1rem;
}

body.dark-mode .property-item h4 {
  color: #64b5f6;
}

.property-item code {
  display: block;
  background: #f8f9fa;
  padding: 0.8rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 1.1rem;
  color: #d63384;
  margin: 0.5rem 0;
  text-align: center;
  font-weight: bold;
}

body.dark-mode .property-item code {
  background: #404040;
  color: #ff79c6;
}

.property-item p {
  margin: 0.5rem 0 0 0;
  font-size: 0.9rem;
  color: #666;
}

body.dark-mode .property-item p {
  color: #aaa;
}

.key-insight {
  background: linear-gradient(135deg, #fff3e0 0%, #ffecb3 100%);
  border: 2px solid #ff9800;
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 2rem;
  text-align: center;
  font-size: 1.1rem;
}

body.dark-mode .key-insight {
  background: linear-gradient(135deg, #4d3d1a 0%, #5d4d2a 100%);
  border-color: #ffb74d;
  color: #ffd700;
}

/* 応用分野グリッド */
.application-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.app-item {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  border-top: 4px solid #ff6600;
}

body.dark-mode .app-item {
  background: #1a1a1a;
  border-top-color: #ff8c42;
  color: #e0e0e0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.app-item h4 {
  margin: 0 0 1.5rem 0;
  color: #ff6600;
  font-size: 1.2rem;
}

body.dark-mode .app-item h4 {
  color: #ff8c42;
}

.app-item ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.app-item li {
  background: #f8f9fa;
  margin-bottom: 0.8rem;
  padding: 0.8rem 1rem;
  border-radius: 6px;
  border-left: 3px solid #ff6600;
  font-size: 0.95rem;
}

body.dark-mode .app-item li {
  background: #2d2d2d;
  border-left-color: #ff8c42;
  color: #e0e0e0;
}

/* 論理演算比較表 */
.logic-comparison {
  margin: 2rem 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body.dark-mode .comparison-table {
  background: #1a1a1a;
  color: #e0e0e0;
}

.comparison-table th {
  background: #2196f3;
  color: white;
  padding: 1rem;
  font-weight: bold;
  text-align: center;
}

body.dark-mode .comparison-table th {
  background: #1976d2;
}

.comparison-table td {
  padding: 1rem;
  text-align: center;
  border-bottom: 1px solid #eee;
  border-right: 1px solid #eee;
}

.comparison-table td:last-child {
  border-right: none;
}

body.dark-mode .comparison-table td {
  border-bottom-color: #444;
  border-right-color: #444;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table .highlight-row {
  background: #fff3e0;
}

body.dark-mode .comparison-table .highlight-row {
  background: #4d3d1a;
}

.comparison-table .highlight-row td {
  font-weight: bold;
}

.comparison-table tbody tr:hover {
  background: #f5f5f5;
}

body.dark-mode .comparison-table tbody tr:hover {
  background: #2d2d2d;
}

.comparison-table tbody tr.highlight-row:hover {
  background: #ffecb3;
}

body.dark-mode .comparison-table tbody tr.highlight-row:hover {
  background: #5d4d2a;
}

/* レスポンシブ対応 */
/* 5文字分（実際の必要幅: 約1361px） */
@media (min-width: 1400px) {
  .bit-container {
    justify-content: flex-start;
  }
}

/* 4文字分 */
@media (max-width: 1399px) and (min-width: 1100px) {
  .container {
    max-width: 1100px;
  }
}

/* 3文字分 */
@media (max-width: 1099px) and (min-width: 850px) {
  .container {
    max-width: 850px;
  }
}

/* 2文字分 */
@media (max-width: 849px) and (min-width: 600px) {
  .container {
    max-width: 600px;
  }
  .bit-container {
    gap: 0.8rem;
  }
}

/* 1文字分 */
@media (max-width: 599px) {
  .container {
    max-width: 100%;
    padding: 0 1rem;
  }
  .bit-container {
    gap: 0.6rem;
    justify-content: center;
  }
}

/* 極小画面（1文字分も収まらない場合）：横スクロール対応 */
@media (max-width: 280px) {
  .bit-display {
    overflow-x: auto;
  }
  .bit-container {
    flex-wrap: nowrap;
    justify-content: flex-start;
  }
}