/* ─── QS付款管理系統 — 主樣式表 ─────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* 色彩系統 */
  --bg-primary:   #0d1117;
  --bg-secondary: #161b22;
  --bg-card:      #1c2230;
  --bg-hover:     #242b3a;
  --bg-input:     #1a2133;

  --accent:       #3b82f6;
  --accent-light: #60a5fa;
  --accent-dark:  #2563eb;
  --accent-glow:  rgba(59, 130, 246, 0.25);

  --success:      #10b981;
  --success-bg:   rgba(16, 185, 129, 0.12);
  --warning:      #f59e0b;
  --warning-bg:   rgba(245, 158, 11, 0.12);
  --danger:       #ef4444;
  --danger-bg:    rgba(239, 68, 68, 0.12);
  --info:         #06b6d4;
  --info-bg:      rgba(6, 182, 212, 0.12);

  --text-primary:   #e6edf3;
  --text-secondary: #8b949e;
  --text-muted:     #484f58;

  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.16);

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px var(--accent-glow);

  --sidebar-w: 240px;
  --header-h:  60px;
  --transition: 0.2s ease;
}

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

html { font-size: 14px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── 捲動條 ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ─── 佈局 ─── */
.layout {
  display: flex;
  height: 100vh;
}

/* ─── 側邊欄 ─── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0; top: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-logo {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; margin-bottom: 10px;
  box-shadow: var(--shadow-glow);
}
.sidebar-logo h1 {
  font-size: 14px; font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}
.sidebar-logo p {
  font-size: 11px; color: var(--text-secondary);
  margin-top: 2px;
}

/* 項目選擇器 */
.project-selector {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.project-selector label {
  display: block;
  font-size: 10px; font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.8px;
  margin-bottom: 6px;
}
.project-selector select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
  padding: 8px 10px;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}
.project-selector select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

/* 導航菜單 */
.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
}
.nav-section-title {
  font-size: 10px; font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.8px;
  padding: 8px 10px 4px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-secondary);
  font-size: 13px; font-weight: 500;
  margin-bottom: 2px;
  border: 1px solid transparent;
  user-select: none;
}
.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent-light);
  border-color: rgba(59,130,246,0.2);
}
.nav-item .nav-icon { font-size: 16px; width: 20px; text-align: center; }
.nav-item .nav-badge {
  margin-left: auto;
  background: var(--accent);
  color: #fff;
  font-size: 10px; font-weight: 600;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 20px; text-align: center;
}

.sidebar-footer {
  padding: 12px 10px;
  border-top: 1px solid var(--border);
}

/* ─── 主內容區 ─── */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow: hidden;
}

/* 頂部欄 */
.topbar {
  height: var(--header-h);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  position: sticky; top: 0; z-index: 50;
}
.topbar-left {
  display: flex; align-items: center; gap: 12px;
}
.topbar-title {
  font-size: 16px; font-weight: 700;
  color: var(--text-primary);
}
.topbar-subtitle {
  font-size: 12px; color: var(--text-secondary);
}
.topbar-right {
  display: flex; align-items: center; gap: 8px;
}

/* 內容區 */
.content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* ─── 頁面 ─── */
.page { display: none; animation: fadeIn 0.25s ease; }
.page.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── 統計卡片 ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.stat-card.success::before { background: linear-gradient(90deg, var(--success), transparent); }
.stat-card.warning::before { background: linear-gradient(90deg, var(--warning), transparent); }
.stat-card.danger::before  { background: linear-gradient(90deg, var(--danger), transparent); }
.stat-card.info::before    { background: linear-gradient(90deg, var(--info), transparent); }

.stat-label {
  font-size: 11px; font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.6px;
  margin-bottom: 8px;
}
.stat-value {
  font-size: 26px; font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-value.small { font-size: 18px; }
.stat-sub {
  font-size: 11px;
  color: var(--text-secondary);
}

/* ─── 卡片 ─── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card-title {
  font-size: 14px; font-weight: 600;
  color: var(--text-primary);
  display: flex; align-items: center; gap: 8px;
}
.card-body { padding: 20px; }

/* ─── 按鈕 ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13px; font-weight: 500;
  cursor: pointer; border: none; outline: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-dark);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--bg-card);
  border-color: var(--border-hover);
}

.btn-success {
  background: var(--success);
  color: #fff;
}
.btn-success:hover:not(:disabled) {
  background: #059669;
  box-shadow: 0 0 12px rgba(16,185,129,0.3);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger-bg);
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger-bg);
}

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 11px 22px; font-size: 14px; }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); }

/* ─── 表格 ─── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
thead tr {
  background: var(--bg-hover);
}
thead th {
  padding: 10px 12px;
  text-align: left;
  font-size: 11px; font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.5px;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}
tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  cursor: pointer;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg-hover); }
tbody td {
  padding: 10px 12px;
  color: var(--text-primary);
  vertical-align: middle;
}
.td-muted { color: var(--text-secondary) !important; }
.td-mono  { font-family: 'Courier New', monospace; font-size: 12px; }
.td-amount { font-weight: 600; text-align: right; }
.td-amount.positive { color: var(--success); }
.td-amount.negative { color: var(--danger); }

/* ─── 標籤 ─── */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 8px;
  border-radius: 20px;
  font-size: 11px; font-weight: 600;
  white-space: nowrap;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger);  }
.badge-info    { background: var(--info-bg);    color: var(--info);    }
.badge-muted   { background: var(--bg-hover);   color: var(--text-secondary); }

/* ─── 表單 ─── */
.form-group {
  margin-bottom: 16px;
}
.form-label {
  display: block;
  font-size: 12px; font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-label .required { color: var(--danger); margin-left: 2px; }
.form-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  padding: 9px 12px;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
.form-input::placeholder { color: var(--text-muted); }
select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}
textarea.form-input { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ─── 搜尋/篩選欄 ─── */
.toolbar {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.search-wrap {
  position: relative;
  flex: 1; min-width: 200px;
}
.search-wrap input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  padding: 9px 12px 9px 36px;
  outline: none;
  transition: border-color var(--transition);
}
.search-wrap input:focus { border-color: var(--accent); }
.search-icon {
  position: absolute; left: 11px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 15px;
}

/* ─── 模態框 ─── */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  z-index: 200;
  align-items: center; justify-content: center;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 90%; max-width: 720px;
  max-height: 90vh;
  overflow: hidden;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s ease;
}
.modal-lg { max-width: 900px; }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-title { font-size: 15px; font-weight: 700; color: var(--text-primary); }
.modal-close {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; transition: all var(--transition);
}
.modal-close:hover { background: var(--danger-bg); color: var(--danger); border-color: transparent; }
.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end; gap: 10px;
  flex-shrink: 0;
}

/* ─── OCR上傳區 ─── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.drop-zone input[type=file] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
}
.drop-icon { font-size: 48px; margin-bottom: 12px; }
.drop-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.drop-sub { font-size: 12px; color: var(--text-secondary); }

/* OCR結果預覽 */
.ocr-preview {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-top: 16px;
  font-family: 'Courier New', monospace;
  font-size: 12px;
  color: var(--text-secondary);
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
}
.ocr-method-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px; font-weight: 600;
}
.ocr-method-badge.gemini     { background: #7c3aed22; color: #a78bfa; }
.ocr-method-badge.quark_handwritten,
.ocr-method-badge.quark_general,
.ocr-method-badge.quark_invoice { background: #0ea5e922; color: #38bdf8; }
.ocr-method-badge.rapidocr   { background: rgba(16,185,129,0.12); color: #10b981; }
.ocr-method-badge.paddleocr  { background: rgba(6,182,212,0.12); color: #06b6d4; }
.ocr-method-badge.easyocr    { background: rgba(245,158,11,0.12); color: #f59e0b; }
.ocr-method-badge.pdfplumber { background: var(--info-bg); color: var(--info); }
.ocr-method-badge.failed     { background: var(--danger-bg); color: var(--danger); }

/* ─── 進度條 ─── */
.progress-bar-wrap {
  background: var(--bg-hover);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: 20px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  transition: width 0.6s ease;
}

/* ─── 圖表 ─── */
.chart-wrap { position: relative; height: 300px; }

/* ─── 空白狀態 ─── */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-secondary);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 16px; }
.empty-state .empty-title { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.empty-state .empty-sub { font-size: 13px; }

/* ─── 載入中 ─── */
.loading-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(13,17,23,0.8);
  backdrop-filter: blur(2px);
  z-index: 500;
  align-items: center; justify-content: center;
  flex-direction: column; gap: 16px;
}
.loading-overlay.show { display: flex; }
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast通知 */
.toast-container {
  position: fixed; right: 20px; bottom: 20px;
  z-index: 600;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 13px;
  max-width: 320px;
  display: flex; align-items: center; gap: 10px;
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.25s ease;
  cursor: pointer;
}
@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info    { border-left: 3px solid var(--info); }

/* ─── 響應式 ─── */
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }
  .sidebar { transform: translateX(-240px); }
  .sidebar.open { transform: translateX(0); width: 240px; }
  .main { margin-left: 0; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ─── 特殊欄位 ─── */
.sc-no-chip {
  display: inline-block;
  padding: 2px 8px;
  background: var(--info-bg);
  color: var(--info);
  border-radius: 4px;
  font-family: monospace;
  font-size: 11px;
  font-weight: 600;
}
.amount-input-wrap { position: relative; }
.amount-input-wrap::before {
  content: 'HK$';
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  font-size: 12px; color: var(--text-muted);
}
.amount-input-wrap input { padding-left: 40px; }

/* 分隔線 */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* 段落標題 */
.section-title {
  font-size: 13px; font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.5px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

/* OCR 項目明細表格 */
.ocr-items-wrap {
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.ocr-items-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.ocr-items-table th {
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}
.ocr-items-table td {
  padding: 4px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.ocr-items-table input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-primary);
  padding: 5px 6px;
  font-size: 12px;
  font-family: inherit;
}
.ocr-items-table input:focus {
  border-color: var(--accent);
  outline: none;
}
.ocr-items-table .btn-del {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  font-size: 14px;
  line-height: 1;
}
.ocr-items-table .btn-del:hover { color: var(--danger); }
.ocr-items-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 24px !important;
  font-size: 12px;
}
.ocr-items-total {
  font-size: 12px;
  color: var(--text-secondary);
}
.ocr-items-total strong {
  color: var(--success);
  margin-left: 4px;
}