/**
 * assets/styles.css
 * 個人營收結算簿 - 響應式現代純 CSS 樣式表
 * 零遠端字型、零 CDN、零外部依賴
 */

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-dark: #cbd5e1;
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;

  --color-income: #16a34a;
  --color-income-bg: #f0fdf4;
  --color-income-border: #bbf7d0;

  --color-subsidy: #0284c7;
  --color-subsidy-bg: #f0f9ff;
  --color-subsidy-border: #bae6fd;

  --color-deduction: #d97706;
  --color-deduction-bg: #fffbeb;
  --color-deduction-border: #fde68a;

  --color-expense: #dc2626;
  --color-expense-bg: #fef2f2;
  --color-expense-border: #fecaca;

  --color-settlement: #4f46e5;
  --color-settlement-bg: #eef2ff;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  --transition: all 0.15s ease-in-out;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 80px;
}

/* 鍵盤無障礙焦點樣式 */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 容器與版面配置 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
}

/* 頁首 */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.brand-title-wrap h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-tag {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  color: #475569;
  border: 1px solid var(--color-border);
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* 儲存狀態指示燈 */
.storage-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  padding: 5px 10px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

/* 中性聲明橫幅 */
.neutral-notice-banner {
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-left: 4px solid #64748b;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-top: 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.825rem;
  color: #334155;
  line-height: 1.45;
}

.notice-icon {
  flex-shrink: 0;
  margin-top: 2px;
  color: #64748b;
}

/* 常用按鈕樣式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-dark);
  background: var(--color-surface);
  color: var(--color-text-main);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  background: var(--color-surface-hover);
  border-color: #94a3b8;
}

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

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

.btn-sm {
  padding: 5px 10px;
  font-size: 0.775rem;
}

.btn-danger {
  color: #dc2626;
  border-color: #fca5a5;
  background: #fff;
}

.btn-danger:hover {
  background: #fef2f2;
  border-color: #dc2626;
}

/* 頂部期間篩選與工具列 */
.period-control-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  margin-top: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.period-inputs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.period-presets {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.preset-chip {
  background: #f1f5f9;
  border: 1px solid transparent;
  color: var(--color-text-muted);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.preset-chip:hover {
  background: #e2e8f0;
  color: var(--color-text-main);
}

.preset-chip.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: #bfdbfe;
}

.date-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.date-input {
  font-family: inherit;
  font-size: 0.825rem;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text-main);
}

.date-input:focus {
  border-color: var(--color-primary);
}

/* 結算總覽卡片 Grid */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.summary-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.summary-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.summary-card.income::before { background: var(--color-income); }
.summary-card.subsidy::before { background: var(--color-subsidy); }
.summary-card.deduction::before { background: var(--color-deduction); }
.summary-card.expense::before { background: var(--color-expense); }
.summary-card.settlement::before { background: var(--color-settlement); }

.summary-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.summary-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.summary-count {
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  color: var(--color-text-muted);
}

.summary-amount {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  word-break: break-all;
}

.summary-card.income .summary-amount { color: var(--color-income); }
.summary-card.subsidy .summary-amount { color: var(--color-subsidy); }
.summary-card.deduction .summary-amount { color: var(--color-deduction); }
.summary-card.expense .summary-amount { color: var(--color-expense); }
.summary-card.settlement .summary-amount { color: var(--color-settlement); }

.summary-card.settlement {
  background: linear-gradient(180deg, #ffffff 0%, var(--color-settlement-bg) 100%);
  border-color: #c7d2fe;
}

.formula-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: monospace;
  font-size: 0.72rem;
  background: #e0e7ff;
  color: #3730a3;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 公式設定區塊 (可收合/展開) */
.formula-section-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-top: 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.section-toggle-header {
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  background: #ffffff;
  user-select: none;
}

.section-toggle-header:hover {
  background: var(--color-surface-hover);
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.formula-body {
  padding: 16px 18px;
  border-top: 1px solid var(--color-border);
  background: #fafafa;
}

.formula-input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.formula-textarea {
  width: 100%;
  font-family: "SFMono-Regular", Consolas, Menlo, Monaco, monospace;
  font-size: 0.95rem;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--color-text-main);
  min-height: 52px;
  resize: vertical;
}

.formula-textarea:focus {
  border-color: var(--color-primary);
}

.formula-quick-insert {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

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

.insert-chip {
  background: #ffffff;
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: monospace;
  cursor: pointer;
  transition: var(--transition);
}

.insert-chip:hover {
  background: #e2e8f0;
  border-color: #cbd5e1;
}

.formula-status-box {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.825rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.formula-status-box.valid {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
}

.formula-status-box.invalid {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.formula-tester-box {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: 12px;
}

.tester-title {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.tester-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
}

.tester-item label {
  display: block;
  font-size: 0.725rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.tester-item input {
  width: 100%;
  font-family: inherit;
  font-size: 0.85rem;
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.tester-result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--color-border);
}

.tester-result-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-settlement);
}

.syntax-guide {
  margin-top: 12px;
  padding: 10px 14px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.775rem;
  color: #475569;
  line-height: 1.6;
}

/* 明細列表區塊 */
.ledger-section {
  margin-top: 20px;
}

.ledger-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.category-tabs {
  display: flex;
  background: #e2e8f0;
  padding: 3px;
  border-radius: var(--radius-md);
  gap: 2px;
  overflow-x: auto;
}

.tab-btn {
  border: none;
  background: transparent;
  padding: 6px 14px;
  font-size: 0.825rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-muted);
  transition: var(--transition);
  white-space: nowrap;
}

.tab-btn.active {
  background: #ffffff;
  color: var(--color-text-main);
  box-shadow: var(--shadow-sm);
}

.ledger-filter-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.search-input {
  font-family: inherit;
  font-size: 0.825rem;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-width: 180px;
  background: #ffffff;
}

.search-input:focus {
  border-color: var(--color-primary);
}

/* 明細表格 */
.table-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.ledger-table th {
  background: #f8fafc;
  color: var(--color-text-muted);
  font-weight: 600;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.ledger-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.ledger-table tbody tr:hover {
  background: #f8fafc;
}

.cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.cat-pill.income { background: var(--color-income-bg); color: var(--color-income); border: 1px solid var(--color-income-border); }
.cat-pill.subsidy { background: var(--color-subsidy-bg); color: var(--color-subsidy); border: 1px solid var(--color-subsidy-border); }
.cat-pill.deduction { background: var(--color-deduction-bg); color: var(--color-deduction); border: 1px solid var(--color-deduction-border); }
.cat-pill.expense { background: var(--color-expense-bg); color: var(--color-expense); border: 1px solid var(--color-expense-border); }

.amount-col {
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
}

.amount-col.income { color: var(--color-income); }
.amount-col.subsidy { color: var(--color-subsidy); }
.amount-col.deduction { color: var(--color-deduction); }
.amount-col.expense { color: var(--color-expense); }

.actions-col {
  text-align: right;
  white-space: nowrap;
}

/* 空狀態 */
.empty-state {
  text-align: center;
  padding: 48px 20px;
}

.empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: #f1f5f9;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 28px;
}

.empty-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

.empty-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 400px;
  margin: 0 auto 16px;
}

/* Modal 彈出視窗 */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  transform: translateY(10px);
  transition: transform 0.2s ease;
}

.modal-backdrop.open .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-main);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: #fafafa;
}

/* 表單元件 */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

.form-group label .required-star {
  color: #dc2626;
  margin-left: 2px;
}

.form-control {
  width: 100%;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--color-text-main);
}

.form-control:focus {
  border-color: var(--color-primary);
}

.form-hint {
  font-size: 0.775rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.form-error {
  font-size: 0.775rem;
  color: #dc2626;
  margin-top: 4px;
  display: none;
}

.form-error.visible {
  display: block;
}

/* 浮動 Toast / 復原提示條 */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: #0f172a;
  color: #ffffff;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideUp 0.25s ease-out;
}

.toast-action-btn {
  background: #3b82f6;
  color: #fff;
  border: none;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.toast-action-btn:hover {
  background: #60a5fa;
}

@keyframes slideUp {
  from {
    transform: translateY(12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* 移動端響應式調整 */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .summary-grid {
    grid-template-columns: 1fr 1fr;
  }

  .summary-card.settlement {
    grid-column: span 2;
  }

  .period-control-card {
    flex-direction: column;
    align-items: stretch;
  }

  .period-inputs {
    flex-direction: column;
    align-items: stretch;
  }

  .date-group {
    width: 100%;
  }

  .date-input {
    width: 100%;
  }

  .ledger-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .ledger-filter-right {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input {
    width: 100%;
  }

  .toast-container {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 480px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
  .summary-card.settlement {
    grid-column: span 1;
  }
}