@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600&display=swap');

/* ===== Theme: Dark (default) ===== */
:root, .theme-dark {
  --bg-primary: #06070a;
  --bg-secondary: #0d1117;
  --bg-tertiary: #161b22;
  --bg-card: rgba(16, 20, 28, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-hover: rgba(0, 212, 255, 0.06);
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --sidebar-bg: #0a0e14;
  --sidebar-text: #8b949e;
  --sidebar-active: #00d4ff;
  --border-color: rgba(0, 212, 255, 0.12);
  --border-light: rgba(255,255,255,0.06);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.5);
  --shadow-modal: 0 16px 48px rgba(0,0,0,0.6);
  --overlay-bg: rgba(6,7,10,0.85);
  --input-bg: rgba(255,255,255,0.04);
  --table-stripe: rgba(0,212,255,0.02);
  --cyan: #00d4ff;
  --cyan-dim: rgba(0,212,255,0.12);
  --purple: #7c3aed;
  --purple-dim: rgba(124,58,237,0.12);
  --green: #00ff88;
  --green-dim: rgba(0,255,136,0.12);
  --red: #ff3860;
  --red-dim: rgba(255,56,96,0.12);
  --amber: #f59e0b;
  --amber-dim: rgba(245,158,11,0.12);
  --glow-cyan: 0 0 20px rgba(0,212,255,0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

/* ===== Theme: Light ===== */
.theme-light {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f8f9fb;
  --bg-card: #ffffff;
  --bg-glass: rgba(0,0,0,0.02);
  --bg-hover: rgba(0,212,255,0.04);
  --text-primary: #1a1d23;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --sidebar-bg: #f0f2f5;
  --sidebar-text: #6b7280;
  --sidebar-active: #0099cc;
  --border-color: rgba(0,0,0,0.08);
  --border-light: rgba(0,0,0,0.04);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-modal: 0 8px 32px rgba(0,0,0,0.12);
  --overlay-bg: rgba(0,0,0,0.4);
  --input-bg: #f8f9fb;
  --table-stripe: rgba(0,0,0,0.02);
  --cyan: #0099cc;
  --cyan-dim: rgba(0,153,204,0.08);
  --purple: #6d28d9;
  --purple-dim: rgba(109,40,217,0.08);
  --green: #059669;
  --green-dim: rgba(5,150,105,0.08);
  --red: #dc2626;
  --red-dim: rgba(220,38,38,0.08);
  --amber: #d97706;
  --amber-dim: rgba(217,119,6,0.08);
  --glow-cyan: 0 0 12px rgba(0,153,204,0.1);
}

/* Shared variables */
:root {
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-display: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Menlo', 'Consolas', 'Courier New', monospace;
  --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* ===== Pages ===== */
.page { display: none; min-height: 100vh; }
.page.active { display: block; }

/* ===== Login ===== */
.login-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg-primary);
  background-image:
    radial-gradient(ellipse at 20% 20%, rgba(0,212,255,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(124,58,237,0.06) 0%, transparent 50%);
}

.login-box {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.login-box .login-icon { font-size: 3rem; margin-bottom: 8px; }
.login-box h1 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.login-box .subtitle { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 32px; }
.login-box h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--cyan);
  margin-bottom: 24px;
}
.login-box .form-group { text-align: left; }
.login-box .form-group label { color: var(--text-secondary); font-size: 0.85rem; text-transform: none; }

#login-form {
  width: 100%;
  display: flex;
  justify-content: center;
}

#setup-form {
  width: 100%;
  max-width: 420px;
}

/* ===== Top Nav ===== */
.top-nav {
  background: var(--bg-secondary);
  padding: 0 24px;
  height: 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

.nav-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ===== Theme Switcher ===== */
.theme-switcher {
  display: flex;
  gap: 6px;
  padding: 4px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 20px;
}

.theme-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.theme-btn:hover { transform: scale(1.15); }
.theme-btn-dark { background: #0d1117; border-color: var(--cyan); color: var(--cyan); font-size: 0.6rem; line-height: 24px; text-align: center; }
.theme-btn-light { background: #f0f2f5; border-color: var(--amber); color: var(--amber); font-size: 0.6rem; line-height: 24px; text-align: center; }

html.theme-dark .theme-btn-dark,
html.theme-light .theme-btn-light {
  box-shadow: 0 0 8px currentColor;
  transform: scale(1.1);
}

/* ===== System Switch (dropdown) ===== */
.system-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  font-size: 0.85rem;
  transition: var(--transition);
}
.system-switch:hover { border-color: var(--cyan); }

.switch-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  min-width: 180px;
  overflow: hidden;
  box-shadow: var(--shadow-modal);
  z-index: 200;
}
.dropdown-item {
  padding: 10px 14px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.85rem;
}
.dropdown-item:hover { background: var(--bg-hover); color: var(--cyan); }
.dropdown-divider { height: 1px; background: var(--border-color); margin: 4px 0; }

/* ===== Main Layout ===== */
.main-layout {
  display: flex;
  min-height: calc(100vh - 56px);
}

/* ===== Sidebar ===== */
.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  padding: 12px 0;
  border-right: 1px solid var(--border-color);
  flex-shrink: 0;
  overflow-y: auto;
  transition: var(--transition);
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  transition: var(--transition);
  border-left: 3px solid transparent;
  font-size: 0.88rem;
  font-weight: 400;
  margin: 2px 8px;
  border-radius: 0 6px 6px 0;
}

.sidebar-nav a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-nav a.active {
  background: var(--bg-hover);
  border-left-color: var(--sidebar-active);
  color: var(--sidebar-active);
  font-weight: 500;
}

.sidebar-nav a span { font-size: 1rem; }

.sidebar-section {
  padding: 16px 20px 4px;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 600;
  opacity: 0.7;
  margin-top: 8px;
  border-top: 1px solid var(--border-light);
}

/* ===== Content ===== */
.content {
  flex: 1;
  padding: 24px 28px;
  overflow-y: auto;
  max-width: 100%;
}

.content-header {
  margin-bottom: 24px;
}

.content-header h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--text-primary), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#page-content { animation: fadeIn 0.25s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Action Bar ===== */
.action-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.action-bar .btn { margin-bottom: 0; }

.action-bar .spacer { margin-left: auto; }

/* ===== Stats Cards ===== */
.stats-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  opacity: 0.7;
}

.stat-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan);
}

.stat-card.gold::before { background: linear-gradient(90deg, var(--amber), transparent); }
.stat-card.green::before { background: linear-gradient(90deg, var(--green), transparent); }
.stat-card.red::before { background: linear-gradient(90deg, var(--red), transparent); }
.stat-card.purple::before { background: linear-gradient(90deg, var(--purple), transparent); }

.stat-card:hover.gold { border-color: var(--amber); }
.stat-card:hover.green { border-color: var(--green); }
.stat-card:hover.red { border-color: var(--red); }
.stat-card:hover.purple { border-color: var(--purple); }

.stat-label {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 500;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stat-value.red { color: var(--red); }
.stat-value.green { color: var(--green); }
.stat-value.gold { color: var(--amber); }

/* ===== Info Bar ===== */
.info-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  padding: 8px 16px;
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  align-items: center;
  flex-wrap: wrap;
}

/* ===== Tables ===== */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.data-table thead {
  position: sticky;
  top: 0;
  z-index: 2;
}

.data-table th {
  background: var(--bg-glass);
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.88rem;
  color: var(--text-primary);
  text-align: center;
}

.data-table tbody tr:nth-child(even) {
  background: var(--table-stripe);
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.data-table .amount {
  font-family: var(--font-mono);
  text-align: right;
  font-weight: 500;
}

.data-table .table-actions {
  display: flex;
  gap: 6px;
  opacity: 0.7;
  transition: var(--transition);
}

.data-table tr:hover .table-actions { opacity: 1; }

/* ===== Status Badges ===== */
.data-table .status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.data-table .status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status.unused { background: var(--green-dim); color: var(--green); }
.status.unused::before { background: var(--green); }
.status.partial { background: var(--amber-dim); color: var(--amber); }
.status.partial::before { background: var(--amber); }
.status.used { background: rgba(72,79,88,0.15); color: var(--text-muted); }
.status.used::before { background: var(--text-muted); }
.status.active { background: var(--cyan-dim); color: var(--cyan); }
.status.active::before { background: var(--cyan); }
.status.direct { background: var(--purple-dim); color: var(--purple); }
.status.direct::before { background: var(--purple); }
.status.completed { background: var(--green-dim); color: var(--green); }
.status.completed::before { background: var(--green); }
.status.cancelled { background: var(--red-dim); color: var(--red); }
.status.cancelled::before { background: var(--red); }
.status.paused { background: var(--amber-dim); color: var(--amber); }
.status.paused::before { background: var(--amber); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #0099cc);
  color: #000;
  font-weight: 600;
}
.btn-primary:hover {
  box-shadow: var(--glow-cyan);
  transform: translateY(-1px);
}

.btn-add {
  background: linear-gradient(135deg, var(--purple), #5b21b6);
  color: #fff;
}
.btn-add:hover {
  box-shadow: 0 0 20px rgba(124,58,237,0.2);
  transform: translateY(-1px);
}

.btn-sm { padding: 5px 12px; font-size: 0.78rem; border-radius: 4px; }
.btn-edit { background: var(--cyan-dim); color: var(--cyan); border: 1px solid rgba(0,212,255,0.15); }
.btn-edit:hover { background: rgba(0,212,255,0.2); }
.btn-delete { background: var(--red-dim); color: var(--red); border: 1px solid rgba(255,56,96,0.15); }
.btn-delete:hover { background: rgba(255,56,96,0.2); }
.btn-cancel { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-color); }
.btn-cancel:hover { border-color: var(--text-secondary); color: var(--text-primary); }
.btn-block { width: 100%; padding: 12px; font-size: 1rem; justify-content: center; }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 92%;
  max-width: 580px;
  max-height: 88vh;
  overflow: hidden;
  box-shadow: var(--shadow-modal);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none; border: none;
  font-size: 1.4rem; cursor: pointer;
  color: var(--text-muted);
  padding: 0 6px;
  transition: var(--transition);
  line-height: 1;
}
.modal-close:hover { color: var(--red); transform: rotate(90deg); }

.modal-body {
  padding: 24px;
  overflow-y: auto;
  max-height: calc(88vh - 120px);
}

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
}

.form-group input:read-only,
.form-group select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--bg-glass);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group textarea { resize: vertical; min-height: 72px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
}

/* Form actions sticky */
.modal-body > form > .form-actions,
.modal-body > .form-actions {
  position: sticky;
  bottom: -24px;
  background: var(--bg-card);
  margin: 24px -24px 0;
  padding: 16px 24px;
  z-index: 10;
}

/* ===== Type indicator (进项/直开) ===== */
#invoice-type-indicator,
#edit-type-indicator {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
}

/* ===== Batch Items ===== */
.batch-item {
  padding: 12px;
  margin-bottom: 8px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.batch-item:hover { border-color: var(--cyan); }

/* ===== Error/Success Message ===== */
.error-message {
  background: var(--red-dim);
  color: var(--red);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  margin-top: 20px;
  border: 1px solid rgba(255,56,96,0.15);
  font-size: 0.9rem;
}
.error-message.success { background: var(--green-dim); color: var(--green); border-color: rgba(0,255,136,0.15); }

/* ===== Setup Form ===== */
#setup-form h2 {
  font-family: var(--font-display);
  margin-bottom: 28px;
  font-size: 1.2rem;
  color: var(--cyan);
}
#setup-form .form-group label { color: var(--text-primary); text-transform: none; font-size: 0.9rem; }

/* ===== Hidden ===== */
.hidden { display: none !important; }

/* ===== Loading ===== */
.loading-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.2s;
}
.loading-overlay.hidden { display: none; }

.loading-spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .main-layout { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
  .sidebar-nav { display: flex; flex-wrap: wrap; gap: 2px; padding: 4px 12px; }
  .sidebar-nav a { border-left: none; border-bottom: 2px solid transparent; padding: 8px 10px; font-size: 0.82rem; margin: 0; border-radius: 0; }
  .sidebar-nav a.active { border-left: none; border-bottom-color: var(--sidebar-active); }
  .sidebar-section { display: none; }
  .stats-cards { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .content { padding: 16px; }
  .theme-switcher { display: none; }
}

@media (max-width: 480px) {
  .stats-cards { grid-template-columns: 1fr; }
  .top-nav { padding: 0 12px; }
  .nav-title { font-size: 1rem; }
}

/* ===== Miscellaneous ===== */
.match-panel-item {
  padding: 12px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  transition: var(--transition);
}
.match-panel-item:hover { border-color: var(--cyan); }

.section-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.progress-bar {
  height: 6px;
  background: var(--bg-glass);
  border-radius: 3px;
  overflow: hidden;
  margin: 8px 0;
}
.progress-bar .fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transition: width 0.3s ease;
}