:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #dfe3e8;
  --color-text: #1f2933;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-danger: #dc2626;
  --color-net: #047857;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px 0;
}

.app-header h1 {
  margin: 0 0 12px;
  font-size: 1.4rem;
}

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.tab-btn {
  padding: 10px clamp(10px, 3vw, 18px);
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--color-muted);
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  flex-shrink: 0;
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: clamp(12px, 4vw, 20px) clamp(12px, 4vw, 24px) 60px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: clamp(14px, 3vw, 20px);
  margin-bottom: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px 20px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

input, select {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-surface);
  width: 100%;
}

.form-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.form-actions button {
  flex: 1 1 140px;
}

button {
  padding: 9px 18px;
  border: none;
  border-radius: 6px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
}

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

button.secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

button.secondary:hover { background: var(--color-bg); }

button.danger-link {
  background: none;
  color: var(--color-danger);
  padding: 4px 8px;
  font-size: 0.82rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.data-table th, .data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 0.88rem;
}

.data-table th {
  background: #f9fafb;
  color: var(--color-muted);
  font-weight: 600;
}

.data-table tbody tr:last-child td { border-bottom: none; }

.result-table {
  width: 100%;
  border-collapse: collapse;
}

.result-table td {
  padding: 8px 4px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}

.result-table td:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.row-net td {
  font-weight: 700;
  color: var(--color-net);
  font-size: 1.05rem;
}

.month-total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--color-border);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.month-total strong {
  font-size: 1.15rem;
  color: var(--color-net);
}

.period-cell {
  cursor: pointer;
  color: var(--color-primary);
  font-weight: 600;
  user-select: none;
}

.period-cell .caret {
  display: inline-block;
  margin-left: 4px;
  transition: transform 0.15s ease;
}

.record-group-row.expanded .caret {
  transform: rotate(90deg);
}

.record-detail-row td {
  background: #f9fafb;
  padding: 12px;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
}

.detail-table th, .detail-table td {
  padding: 6px 8px;
  font-size: 0.82rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.detail-table tbody tr:last-child td { border-bottom: none; }

.filter-bar {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-bar label { flex: 1 1 160px; }
.filter-bar button { flex: 0 1 auto; }

.allowances-section {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.allowances-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.allowances-header span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.allowance-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
  align-items: center;
}

.allowance-row .allowance-name { flex: 2 1 160px; }
.allowance-row .allowance-amount { flex: 1 1 110px; }
.allowance-row .remove-allowance-btn { flex: 0 0 auto; }
.allowance-row input { margin: 0; }

/* yyyy-mm 入力 */
.ym-input {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ym-input input {
  width: 4.5em;
  text-align: center;
}

.ym-sep {
  color: var(--color-muted);
}

/* セクション見出しの行(タイトル + 右側にコントロール) */
.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
  margin-bottom: 12px;
}

.section-header h2, .section-header h1 { margin: 0; }

/* 月単位・日単位トグル */
.period-toggle {
  display: flex;
  gap: 4px;
}

.period-toggle-btn {
  padding: 5px 12px;
  font-size: 0.8rem;
  background: var(--color-surface);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
}

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

/* 所属チップ */
.inline-form {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
}

.inline-form label { flex: 1 1 200px; }
.inline-form button { flex: 0 1 auto; }

.chip-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0 0 24px;
}

.chip-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 8px 6px 14px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.chip-delete {
  background: none;
  border: none;
  color: var(--color-muted);
  font-size: 1rem;
  line-height: 1;
  padding: 2px 6px;
  cursor: pointer;
}

.chip-delete:hover { color: var(--color-danger); }

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ログイン画面 */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.login-card {
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-title {
  margin: 0 0 4px;
  font-size: 1.2rem;
  text-align: center;
}

.login-error {
  margin: 0;
  color: var(--color-danger);
  font-size: 0.85rem;
}

.logout-btn {
  background: none;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  font-size: 0.8rem;
  padding: 6px 12px;
}

/* ---------- 小さい画面での微調整 ---------- */
@media (max-width: 640px) {
  .app-header { padding: 12px 16px 0; }
  .app-header h1 { font-size: 1.15rem; }

  .tab-btn {
    padding: 10px 12px;
    font-size: 0.85rem;
  }

  main { padding-bottom: 40px; }

  .data-table th, .data-table td {
    padding: 8px;
    font-size: 0.82rem;
  }
}

@media (max-width: 420px) {
  .filter-bar,
  .inline-form {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-bar button,
  .inline-form button {
    width: 100%;
  }
}