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

:root {
  --primary: #f5a623;
  --primary-dark: #d4891a;
  --bg: #fef9f0;
  --card: #ffffff;
  --text: #333333;
  --text-sub: #888888;
  --border: #e8e0d0;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

body {
  font-family: 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
}

/* ヘッダー */
header {
  background: var(--primary);
  color: white;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(245,166,35,0.3);
}

header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.header-date {
  font-size: 0.8rem;
  opacity: 0.9;
}

/* タブ */
.tabs {
  display: flex;
  background: var(--card);
  border-bottom: 2px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 12px;
  border: none;
  background: transparent;
  font-size: 0.9rem;
  color: var(--text-sub);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.tab-btn.active {
  color: var(--primary-dark);
  font-weight: 700;
  border-bottom: 3px solid var(--primary);
  margin-bottom: -2px;
}

/* メインコンテンツ */
main {
  flex: 1;
  padding: 16px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

/* 今日の登録フォーム */
.today-card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.today-card h2 {
  font-size: 1rem;
  color: var(--text-sub);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 気分アイコン選択 */
.mood-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  display: block;
}

.mood-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.mood-btn {
  aspect-ratio: 1;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  font-size: 1.6rem;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.mood-btn span.label {
  font-size: 0.55rem;
  color: var(--text-sub);
  margin-top: 2px;
}

.mood-btn:active {
  transform: scale(0.95);
}

.mood-btn.selected {
  border-color: var(--primary);
  background: #fff8ed;
  box-shadow: 0 0 0 2px rgba(245,166,35,0.3);
}

/* テキストエリア */
.comment-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  display: block;
}

textarea {
  width: 100%;
  min-height: 100px;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg);
  color: var(--text);
  resize: none;
  transition: border-color 0.2s;
  line-height: 1.6;
}

textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
}

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-sub);
  margin-top: 4px;
}

.char-count.over {
  color: #e74c3c;
}

/* 保存ボタン */
.save-btn {
  width: 100%;
  padding: 14px;
  margin-top: 16px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  letter-spacing: 0.05em;
}

.save-btn:active {
  background: var(--primary-dark);
  transform: scale(0.98);
}

.save-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
}

/* 今日の記録済み表示 */
.already-saved {
  background: #f0faf0;
  border: 2px solid #a8d8a8;
  border-radius: 16px;
  padding: 20px;
  text-align: center;
}

.already-saved .saved-mood {
  font-size: 3rem;
  margin-bottom: 8px;
}

.already-saved .saved-comment {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 12px;
}

.edit-btn {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary-dark);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}

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

/* 履歴リスト */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.history-item {
  background: var(--card);
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  animation: fadeIn 0.2s ease;
}

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

.history-mood {
  font-size: 2rem;
  flex-shrink: 0;
  line-height: 1;
  padding-top: 2px;
}

.history-content {
  flex: 1;
  min-width: 0;
}

.history-date {
  font-size: 0.75rem;
  color: var(--text-sub);
  margin-bottom: 4px;
}

.history-comment {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
  word-break: break-all;
}

.history-delete {
  background: transparent;
  border: none;
  color: #ccc;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
  transition: color 0.2s;
}

.history-delete:active {
  color: #e74c3c;
}

.empty-msg {
  text-align: center;
  color: var(--text-sub);
  padding: 40px 20px;
  font-size: 0.95rem;
  line-height: 1.8;
}

.empty-msg .empty-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 12px;
}

/* トースト通知 */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: #333;
  color: white;
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  transition: transform 0.3s ease;
  z-index: 100;
  white-space: nowrap;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}