:root {
  --brand: #b46471;
  --brand-dark: #783a44;
  --bg: #faf0ef;
  --card-bg: #ffffff;
  --text: #3a262a;
  --text-muted: #8a6c6d;
  --border: #f0dcdb;
  --danger: #c0453a;
  --radius: 14px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 3rem;
}

.btn {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:active {
  background: var(--brand-dark);
}

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

.btn-danger {
  background: none;
  color: var(--danger);
  box-shadow: inset 0 0 0 1px var(--danger);
}

/* ---- ヘッダー ---- */
.app-header {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  position: sticky;
  top: 0;
  z-index: 10;
}

.sync-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  border-radius: 8px;
  padding: 0.4rem;
  cursor: pointer;
  color: #fff;
}

.icon-btn:active {
  background: rgba(255, 255, 255, 0.35);
}

/* ---- 入力フォーム ---- */
.entry-form {
  background: var(--card-bg);
  margin: 1rem;
  padding: 1.1rem;
  border-radius: var(--radius);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.entry-form label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.field-row {
  display: flex;
  gap: 0.75rem;
}

.field-row label {
  flex: 1;
}

.entry-form input {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.7rem 0.8rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
}

/* ---- サマリーカード ---- */
.summary-cards {
  display: flex;
  gap: 0.75rem;
  padding: 0 1rem;
  margin-bottom: 1rem;
  overflow-x: auto;
}

.summary-card {
  flex: 1;
  min-width: 150px;
  background: var(--card-bg);
  border: none;
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  text-align: left;
  font-family: inherit;
  cursor: pointer;
}

.summary-card:active {
  transform: scale(0.98);
}

.summary-card.is-highlight {
  background: var(--brand);
  color: #fff;
}

.summary-card .label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.summary-card.is-highlight .label {
  color: rgba(255, 255, 255, 0.85);
}

.summary-card .value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 0.25rem;
}

/* ---- 月別内訳 ---- */
.months-list {
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.month-group {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.month-group summary {
  list-style: none;
  padding: 0.9rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
}

.month-group summary::-webkit-details-marker {
  display: none;
}

.month-group summary .month-total {
  color: var(--brand);
}

.entry-list {
  border-top: 1px solid var(--border);
}

.entry-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  cursor: pointer;
}

.entry-row:last-child {
  border-bottom: none;
}

.entry-row:active {
  background: var(--bg);
}

.entry-row-right {
  display: flex;
  align-items: center;
}

.entry-row .entry-info .entry-date {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.entry-row .entry-info .entry-memo {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.entry-row .entry-amount {
  font-weight: 700;
  margin-right: 0.75rem;
}

.entry-delete {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.3rem;
}

.entry-delete:active {
  color: var(--danger);
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

/* ---- 編集ダイアログ ---- */
dialog {
  border: none;
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 320px;
  width: 90%;
  background: var(--card-bg);
  color: var(--text);
}

dialog::backdrop {
  background: rgba(58, 38, 42, 0.45);
}

dialog h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

dialog label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

dialog input {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.7rem 0.8rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
}

.dialog-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.dialog-actions .btn {
  margin: 0;
  padding: 0.7rem 0.5rem;
  font-size: 0.85rem;
}

/* ---- トースト ---- */
.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(38, 32, 42, 0.92);
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font-size: 0.85rem;
  z-index: 50;
}

.toast[hidden] {
  display: none;
}