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

:root {
  --primary: #1a73e8;
  --primary-light: #e8f0fe;
  --success: #34a853;
  --warning: #fbbc04;
  --danger: #ea4335;
  --text: #202124;
  --text-secondary: #5f6368;
  --border: #dadce0;
  --bg: #f8f9fa;
  --white: #ffffff;
  --sidebar-width: 220px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background: var(--white);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-header img { height: 36px; width: auto; }
.sidebar-header .brand { font-size: 16px; font-weight: 700; color: var(--primary); }

.sidebar-nav { flex: 1; padding: 8px 0; overflow-y: auto; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: var(--text-secondary);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: all 0.2s;
}

.nav-item:hover { background: var(--bg); color: var(--text); text-decoration: none; }
.nav-item.active { background: var(--primary-light); color: var(--primary); border-left-color: var(--primary); font-weight: 500; }
.nav-item .icon { font-size: 18px; width: 24px; text-align: center; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
}

.sidebar-footer .user-info { margin-bottom: 8px; }
.sidebar-footer .user-name { font-weight: 600; color: var(--text); }
.sidebar-footer .logout-btn {
  display: block; width: 100%; padding: 6px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; text-align: center; font-size: 12px;
  color: var(--text-secondary); cursor: pointer;
}
.sidebar-footer .logout-btn:hover { background: var(--danger); color: white; border-color: var(--danger); }

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
}

.topbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar h1 { font-size: 18px; font-weight: 600; }
.topbar .page-actions { display: flex; gap: 8px; align-items: center; }

.mobile-menu-btn {
  display: none;
  background: none; border: none;
  font-size: 22px; cursor: pointer;
  padding: 4px 8px;
}

.content { padding: 24px; }

/* Cards */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
}

.stat-card .label { font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }
.stat-card .value { font-size: 24px; font-weight: 700; }
.stat-card .value.income { color: var(--success); }
.stat-card .value.expense { color: var(--danger); }
.stat-card .value.net { color: var(--primary); }
.stat-card .sub { font-size: 11px; color: var(--text-secondary); margin-top: 4px; }

/* Tables */
.table-wrapper { overflow-x: auto; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

table.data-table th {
  background: var(--bg);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

table.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

table.data-table tr:hover { background: var(--bg); }
table.data-table .amount { text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; }
table.data-table .amount.income { color: var(--success); }
table.data-table .amount.expense { color: var(--danger); }
table.data-table .actions { white-space: nowrap; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
  text-decoration: none;
}

.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: #1557b0; }
.btn-secondary { background: var(--white); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--bg); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #c5221f; }
.btn-success { background: var(--success); color: white; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.form-group .hint { font-size: 11px; color: var(--text-secondary); margin-top: 4px; }

.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
  background: var(--white);
}

.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,0.1); }
.form-control:disabled { background: var(--bg); color: var(--text-secondary); }

select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235f6368' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px; }

.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 150px; }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--white);
  border-radius: 12px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

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

.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text-secondary); padding: 0 4px; }
.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}

.badge-income { background: #e6f4ea; color: var(--success); }
.badge-expense { background: #fce8e6; color: var(--danger); }
.badge-admin { background: #fef7e0; color: #b06000; }
.badge-editor { background: #e8f0fe; color: var(--primary); }
.badge-viewer { background: var(--bg); color: var(--text-secondary); }
.badge-over { background: #fce8e6; color: var(--danger); font-weight: 600; }
.badge-ok { background: #e6f4ea; color: var(--success); }

/* Progress bar */
.progress-bar {
  height: 8px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
  min-width: 80px;
}

.progress-bar .fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-bar .fill.ok { background: var(--success); }
.progress-bar .fill.warn { background: var(--warning); }
.progress-bar .fill.over { background: var(--danger); }

/* Filters */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 16px;
}

.filter-bar .form-group { margin-bottom: 0; min-width: 140px; }

/* Login page */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
  padding: 16px;
}

.login-box {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-box .logo { text-align: center; margin-bottom: 24px; }
.login-box .logo img { height: 56px; width: auto; }
.login-box h2 { text-align: center; font-size: 20px; margin-bottom: 24px; }

/* Flash messages */
.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
}

.flash-error { background: #fce8e6; color: var(--danger); border: 1px solid #f5c6c0; }
.flash-success { background: #e6f4ea; color: var(--success); border: 1px solid #b8ddc2; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}
.empty-state .icon { font-size: 48px; margin-bottom: 12px; opacity: 0.5; }

/* Category tree */
.cat-l1 {
  background: var(--primary-light);
  font-weight: 600;
}
.cat-l2 { padding-left: 32px !important; }

/* Weekly tabs */
.weekly-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--border);
}

.weekly-tab {
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}

.weekly-tab:hover { color: var(--text); }
.weekly-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.weekly-content { display: none; }
.weekly-content.active { display: block; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 20px rgba(0,0,0,0.15); }
  .main-content { margin-left: 0; }
  .mobile-menu-btn { display: block; }
  .topbar { padding: 10px 16px; }
  .topbar h1 { font-size: 16px; }
  .content { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-card .value { font-size: 18px; }
  .card { padding: 14px; }
  .form-row { flex-direction: column; gap: 0; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-bar .form-group { min-width: 100%; }
  table.data-table { font-size: 12px; }
  table.data-table th, table.data-table td { padding: 8px; }
  .modal { max-width: 100%; }
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 99;
}

.sidebar-overlay.active { display: block; }

@media (min-width: 769px) {
  .sidebar-overlay { display: none !important; }
}