* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4a90d9;
  --primary-dark: #357abd;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --background-color: #f5f5f5;
  --card-background: #ffffff;
  --text-color: #333333;
  --text-light: #666666;
  --border-color: #dddddd;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  min-height: 100vh;
}

/* ヘッダー */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  padding: 0 16px;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header h1 {
  font-size: 1.2rem;
  margin-left: 16px;
}

/* ハンバーガーメニュー */
.hamburger {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 3px;
  background-color: white;
  border-radius: 2px;
}

/* サイドメニュー */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.5);
  z-index: 200;
  display: none;
}

.menu-overlay.active {
  display: block;
}

.side-menu {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background-color: white;
  z-index: 300;
  transition: left 0.3s ease;
  box-shadow: 2px 0 8px rgba(0,0,0,0.2);
}

.side-menu.active {
  left: 0;
}

.menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  background-color: var(--primary-color);
  color: white;
}

.menu-header h2 {
  font-size: 1.2rem;
}

.close-btn {
  background: none;
  border: none;
  color: white;
  font-size: 28px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.menu-list {
  list-style: none;
}

.menu-list li a {
  display: block;
  padding: 16px 20px;
  color: var(--text-color);
  text-decoration: none;
  border-bottom: 1px solid var(--border-color);
  font-size: 1rem;
}

.menu-list li a:hover {
  background-color: var(--background-color);
}

/* メインコンテンツ */
.main-content {
  margin-top: 56px;
  padding: 16px;
  min-height: calc(100vh - 56px);
}

/* ホーム画面 */
.home-buttons {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 400px;
  margin: 0 auto;
  padding-top: 20px;
}

.home-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
  background-color: var(--card-background);
  border: none;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  font-size: 1.2rem;
  color: var(--text-color);
}

.home-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

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

/* カード */
.card {
  background-color: var(--card-background);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card-title {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 12px;
  color: var(--text-color);
}

/* フォーム */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  background-color: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

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

/* 数値入力用（大きめ） */
.number-input {
  display: flex;
  align-items: center;
  gap: 12px;
}

.number-input input {
  width: 100px;
  text-align: center;
  font-size: 1.2rem;
}

.number-input .unit {
  color: var(--text-light);
}

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

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

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

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

.btn-success:hover {
  background-color: #218838;
}

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

.btn-secondary:hover {
  background-color: #5a6268;
}

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

.btn-danger:hover {
  background-color: #c82333;
}

.btn-block {
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.btn-group .btn {
  flex: 1;
}

/* リスト */
.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background-color: var(--card-background);
  border-radius: 8px;
  margin-bottom: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  cursor: pointer;
  transition: background-color 0.2s;
}

.list-item:hover {
  background-color: #f8f9fa;
}

.list-item-content {
  flex: 1;
}

.list-item-title {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 4px;
}

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

.list-item-arrow {
  color: var(--text-light);
  font-size: 1.2rem;
}

/* 種目カード（本日のメニュー用） */
.exercise-card {
  background-color: var(--card-background);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.exercise-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.exercise-name {
  font-size: 1.3rem;
  font-weight: bold;
}

.exercise-part {
  font-size: 0.85rem;
  color: white;
  background-color: var(--primary-color);
  padding: 4px 10px;
  border-radius: 12px;
}

.exercise-specs {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.exercise-spec {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}

.exercise-spec-value {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--primary-color);
}

.exercise-spec-label {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* ローテーション設定 */
.day-card {
  background-color: var(--card-background);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.day-header {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 12px;
  color: var(--primary-color);
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  background-color: var(--background-color);
  border-radius: 20px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.checkbox-label input {
  margin-right: 8px;
}

.checkbox-label.checked {
  background-color: var(--primary-color);
  color: white;
}

/* 本日のメニュー */
.today-header {
  text-align: center;
  padding: 20px 0;
}

.today-date {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 8px;
}

.today-cycle {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 1rem;
  margin-bottom: 8px;
}

.today-parts {
  font-size: 1.2rem;
  color: var(--text-color);
  margin-bottom: 8px;
}

.today-time {
  font-size: 1rem;
  color: var(--text-light);
}

.time-warning {
  background-color: #fff3cd;
  border: 1px solid #ffc107;
  color: #856404;
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 8px;
  font-weight: 500;
  text-align: center;
}

.time-limit-input {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
}

.rest-day {
  text-align: center;
  padding: 60px 20px;
}

.rest-day-icon {
  font-size: 4rem;
  margin-bottom: 16px;
}

.rest-day-text {
  font-size: 1.3rem;
  color: var(--text-light);
}

/* 履歴 */
.history-item {
  background-color: var(--card-background);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.history-date {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 8px;
}

.history-parts {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.history-part-tag {
  background-color: var(--primary-color);
  color: white;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
}

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

/* ローディング */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px;
}

.loading::after {
  content: '';
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* 空状態 */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

/* バッジ */
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-required {
  background-color: var(--danger-color);
  color: white;
}

.badge-rotation {
  background-color: var(--warning-color);
  color: var(--text-color);
}

/* レスポンシブ */
@media (min-width: 768px) {
  .main-content {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .home-buttons {
    padding-top: 40px;
  }

  .exercise-specs {
    gap: 24px;
  }
}

/* トースト通知 */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #333;
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s;
}

.toast.show {
  opacity: 1;
}

/* サジェスト */
.suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 0 0 8px 8px;
  max-height: 150px;
  overflow-y: auto;
  z-index: 10;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.suggestion-item {
  padding: 10px 12px;
  cursor: pointer;
}

.suggestion-item:hover {
  background-color: var(--background-color);
}

.input-wrapper {
  position: relative;
}

/* 認証画面 */
.auth-container {
  max-width: 400px;
  margin: 0 auto;
  padding: 24px 16px;
}

.auth-form {
  background-color: var(--card-background);
  padding: 32px 24px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.auth-link {
  text-align: center;
  margin-top: 16px;
}

.auth-link a {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
}

.auth-link a:hover {
  text-decoration: underline;
}

.error-message {
  background-color: #f8d7da;
  color: #721c24;
  padding: 12px;
  border-radius: 4px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.menu-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 8px 0;
  list-style: none;
}

/* ラジオグループ */
.radio-group {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-weight: normal;
}

.radio-group input[type="radio"] {
  cursor: pointer;
}

/* 種目カード - メディア対応レイアウト */
.exercise-card-content {
  display: flex;
  gap: 12px;
  align-items: center;
}

.exercise-card-main {
  flex: 1;
  cursor: pointer;
}

/* メディアサムネイル */
.exercise-media-thumbnail {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  background-color: #f0f0f0;
  transition: transform 0.2s;
}

.exercise-media-thumbnail:hover {
  transform: scale(1.05);
}

.exercise-media-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.exercise-media-thumbnail.youtube .youtube-play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 24px;
  color: white;
  background-color: rgba(0, 0, 0, 0.7);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* メディアモーダル */
.media-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
}

.media-modal.active {
  display: flex;
}

.media-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.9);
  cursor: pointer;
}

.media-modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  z-index: 1001;
}

.media-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 36px;
  cursor: pointer;
  padding: 0;
  width: 40px;
  height: 40px;
  line-height: 40px;
  text-align: center;
}

.media-modal-close:hover {
  opacity: 0.8;
}

#media-modal-body {
  background-color: white;
  border-radius: 8px;
  overflow: hidden;
  max-width: 90vw;
  max-height: 90vh;
}

#media-modal-body img {
  display: block;
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
}

#media-modal-body iframe {
  display: block;
  width: 100%;
  min-width: 320px;
  min-height: 240px;
  max-width: 800px;
  aspect-ratio: 16 / 9;
}

@media (max-width: 600px) {
  #media-modal-body iframe {
    max-width: 90vw;
  }
}