/* 全体デザイン設定 */
:root {
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --secondary-color: #64748b;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-color: #1e293b;
  --border-color: #e2e8f0;
  --danger-color: #ef4444;
  --success-color: #10b981;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  padding: 16px;
  max-width: 800px;
  margin: 0 auto;
}

/* カードスタイル */
.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
}

.ai-card {
  border: 2px solid #818cf8;
  background-color: #f5f3ff;
}

/* 認証カード */
.auth-card {
  max-width: 400px;
  margin: 40px auto;
  text-align: center;
}

.auth-tabs {
  display: flex;
  margin: 20px 0;
  border-bottom: 2px solid var(--border-color);
}

.auth-tabs button {
  flex: 1;
  padding: 10px;
  border: none;
  background: none;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  color: var(--secondary-color);
}

.auth-tabs button.active {
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
}

/* ヘッダー・ナビゲーション */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.nav-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.nav-btn {
  padding: 10px 16px;
  border: none;
  background-color: #e2e8f0;
  color: var(--text-color);
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: bold;
}

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

/* --- 手帳風バーチカルグリッドのスタイル --- */
.planner-wrapper {
  overflow-x: auto;
  margin-top: 12px;
}

.planner-grid {
  display: grid;
  grid-template-columns: 50px repeat(7, minmax(100px, 1fr));
  border: 1px solid #cbd5e1;
  background: #fff;
  border-radius: 6px;
  font-size: 13px;
}

.planner-header {
  border-bottom: 2px solid #cbd5e1;
  border-right: 1px solid #e2e8f0;
  padding: 8px 4px;
  text-align: center;
  background-color: #f1f5f9;
  font-weight: bold;
}

.planner-header.sat { color: #2563eb; }
.planner-header.sun { color: #dc2626; }

.planner-time-col {
  border-right: 1px solid #cbd5e1;
  background-color: #f8fafc;
}

.planner-time-slot {
  height: 40px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  font-size: 11px;
  color: #64748b;
  padding-top: 2px;
}

/* 8:00〜16:00のグレー背景（画像のデザインを再現） */
.planner-time-slot.shaded, .planner-day-slot.shaded {
  background-color: #e2e8f0;
}

.planner-day-col {
  border-right: 1px solid #e2e8f0;
}

.planner-day-slot {
  height: 40px;
  border-bottom: 1px dotted #cbd5e1;
  position: relative;
}

/* フォーム要素 */
.form-group {
  margin-bottom: 16px;
  text-align: left;
  flex: 1;
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

label {
  display: block;
  font-size: 14px;
  font-weight: bold;
  margin-bottom: 6px;
}

input, select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
}

/* ボタン */
button {
  cursor: pointer;
  border-radius: 6px;
  font-weight: bold;
  transition: background-color 0.2s;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 10px 16px;
}

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

.btn-secondary {
  background-color: var(--secondary-color);
  color: white;
  border: none;
  padding: 10px 16px;
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
  border: none;
  padding: 10px 16px;
}

.btn-ai {
  background-color: #6366f1;
  color: white;
  border: none;
  padding: 10px 16px;
  width: 100%;
  margin-top: 8px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* タイマー画面 */
.timer-container {
  text-align: center;
  margin: 20px 0;
  padding: 20px;
  background-color: #f1f5f9;
  border-radius: 8px;
}

.timer-readout {
  font-size: 48px;
  font-family: monospace;
  font-weight: bold;
  margin-bottom: 12px;
}

.input-mode-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.mode-btn {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--border-color);
  background: #fff;
}

.mode-btn.active {
  background: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

/* タブコンテンツ制御 */
.tab-content {
  display: none;
}

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

/* リスト・グラフ・ユーティリティ */
.item-list {
  list-style: none;
  margin-top: 12px;
}

.item-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

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

.chart-wrapper {
  position: relative;
  height: 250px;
}

.countdown-display {
  font-size: 20px;
  font-weight: bold;
  text-align: center;
  color: var(--primary-color);
  margin-top: 12px;
  padding: 12px;
  background: #e0e7ff;
  border-radius: 6px;
}

.ai-response-box {
  margin-top: 12px;
  padding: 12px;
  background: #fff;
  border-radius: 6px;
  border: 1px solid #c7d2fe;
  line-height: 1.5;
}

.message {
  margin-top: 10px;
  font-size: 14px;
}