:root {
  --bg-color: #FAF6F6;
  --card-bg: #FFFFFF;
  --accent: #E87A90;
  --accent-light: #F5D5DD;
  --border: #E8DCDC;
  --text-main: #2D2D2D;
  --text-sub: #5A5A5A;
  --text-light: #8A8A8A;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Zen Kaku Gothic Antique', sans-serif;
  background: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* フォーカススタイル（アクセシビリティ） */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ヘッダー */
header {
  text-align: center;
  padding: 2rem 1.5rem 1.5rem;
}

header h1 {
  font-family: 'Kaisei Opti', serif;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

header p {
  font-size: 0.9rem;
  color: var(--text-sub);
  font-weight: 400;
}

/* コンテナ */
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
}

/* カード */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
}

/* ステート表示 */
.state {
  display: none;
  padding: 4rem 2rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-sub);
}

.state-loading::before {
  content: '';
  display: block;
  width: 32px;
  height: 32px;
  margin: 0 auto 1rem;
  border: 3px solid var(--accent-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

[data-state="loading"] .state-loading { display: block; }
[data-state="empty"] .state-empty { display: block; }
[data-state="error"] .state-error { display: block; color: #D64F4F; }
[data-state="ready"] .state { display: none; }
[data-state="ready"] .content { display: block; }

.content { display: none; }

/* タブ */
.tabs {
  display: flex;
  background: var(--accent-light);
  padding: 4px;
  gap: 4px;
}

.tab-button {
  flex: 1;
  padding: 0.9rem 1rem;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  cursor: pointer;
  transition: all var(--transition);
}

.tab-button:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.5);
}

.tab-button[aria-selected="true"] {
  background: var(--card-bg);
  color: var(--accent);
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

/* タブパネル */
.tab-panel {
  display: none !important;
  padding: 1.5rem;
}

.tab-panel.is-active {
  display: block !important;
  animation: fadeIn 0.25s ease;
}

.tab-panel.budget-panel.is-active {
  display: grid !important;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.schedule h3,
.budget-head h3 {
  font-family: 'Kaisei Opti', serif;
  font-size: 1.3rem;
  color: var(--text-main);
  text-align: center;
  margin-bottom: 1rem;
  font-weight: 700;
}

.budget-head p {
  text-align: center;
  color: var(--text-light);
  font-size: 0.85rem;
  margin-top: -0.5rem;
  margin-bottom: 1.2rem;
}

/* デイセクション */
.day {
  background: var(--bg-color);
  border-radius: 10px;
  padding: 1.1rem;
  margin-bottom: 0.9rem;
  border: 1px solid transparent;
  transition: border-color var(--transition);
}

.day:hover {
  border-color: var(--border);
}

.day:last-child {
  margin-bottom: 0;
}

.day h4 {
  font-family: 'Kaisei Opti', serif;
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 0.7rem;
  font-weight: 600;
}

.day ul {
  list-style: none;
}

.day li {
  padding: 0.35rem 0 0.35rem 1.2rem;
  position: relative;
  color: var(--text-sub);
  font-size: 0.92rem;
}

.day li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

/* 予算パネル */
.budget-panel {
  gap: 2.5rem;
}

/* 予算カード */
.budget-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem;
  transition: box-shadow var(--transition);
}

.budget-card:hover {
  box-shadow: var(--shadow-hover);
}

.budget-card h3 {
  font-family: 'Kaisei Opti', serif;
  font-size: 1rem;
  color: var(--text-main);
  margin: 0 0 1rem;
  text-align: center;
  font-weight: 600;
  padding: 0.5rem 0 0.8rem;
  border-bottom: 1px solid var(--border);
}

/* 予算テーブル */
.budget-table {
  width: 100%;
  border-collapse: collapse;
}

.budget-table th,
.budget-table td {
  padding: 0.65rem 0.7rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.budget-table th {
  font-weight: 500;
  color: var(--text-main);
  font-size: 0.9rem;
}

.budget-table td {
  text-align: right;
  font-weight: 600;
  color: var(--text-main);
  font-size: 0.9rem;
  font-feature-settings: 'tnum';
  letter-spacing: 0.02em;
}

.budget-table tr:last-child th,
.budget-table tr:last-child td {
  border-bottom: none;
}

/* トグルボタン */
.toggle {
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: inherit;
  font-size: inherit;
  font-weight: 500;
  color: var(--text-main);
  transition: color var(--transition);
  border-radius: 4px;
}

.toggle:hover {
  color: var(--accent);
}

.toggle:active {
  transform: scale(0.99);
}

.toggle-icon {
  color: var(--accent);
  font-size: 0.75rem;
  transition: transform var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--accent-light);
  border-radius: 4px;
}

.toggle[aria-expanded="true"] .toggle-icon {
  transform: rotate(180deg);
}

/* 明細行 */
.breakdown {
  display: none;
  background: var(--bg-color);
}

.breakdown.is-open {
  display: table-row;
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.breakdown th {
  color: var(--text-sub);
  font-size: 0.85rem;
  padding-left: 1.8rem;
}

.breakdown td {
  font-weight: 500;
  color: var(--text-sub);
}

/* 合計行 */
.total-row {
  background: linear-gradient(90deg, var(--accent-light) 0%, rgba(245, 213, 221, 0.5) 100%);
}

.total-row th,
.total-row td {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
}

.total-row td {
  font-size: 1rem;
}

/* 注釈 */
.note {
  text-align: center;
  color: var(--text-light);
  font-size: 0.75rem;
  padding: 0.8rem;
}

/* フッター */
.footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-light);
  font-size: 0.8rem;
}

/* リビールアニメーション */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* レスポンシブ */
@media (max-width: 600px) {
  header {
    padding: 1.5rem 1rem 1rem;
  }

  .container {
    padding: 0 1rem 1.5rem;
  }

  .tab-panel {
    padding: 1.2rem;
  }

  .tab-button {
    padding: 0.8rem;
    font-size: 0.85rem;
  }

  .day,
  .budget-card {
    padding: 1rem;
  }

  .budget-table th,
  .budget-table td {
    padding: 0.6rem 0.5rem;
    font-size: 0.85rem;
  }

  .breakdown th {
    padding-left: 1.2rem;
  }
}