@import url('variables.css');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; }

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

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-inverse);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
  overflow-y: auto;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-logo {
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px;
}

.sidebar-title { font-size: 15px; font-weight: 600; line-height: 1.3; }
.sidebar-subtitle { font-size: 11px; opacity: 0.6; }

.sidebar-nav { flex: 1; padding: 12px 0; }

.nav-section { padding: 8px 16px 4px; font-size: 10px; text-transform: uppercase; letter-spacing: 1px; opacity: 0.4; font-weight: 600; }

.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 20px;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  transition: all var(--transition);
  border-left: 3px solid transparent;
  font-size: 13.5px;
  font-weight: 500;
}

.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active { background: rgba(37,99,235,0.2); color: #fff; border-left-color: var(--primary); }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.8; }

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-navbar {
  height: var(--navbar-height);
  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;
  box-shadow: var(--shadow);
}

.navbar-left { display: flex; align-items: center; gap: 16px; }
.navbar-right { display: flex; align-items: center; gap: 12px; }

.menu-toggle {
  display: none;
  background: none; border: none;
  color: var(--text-primary);
  cursor: pointer; padding: 8px;
  border-radius: var(--radius-sm);
}

.page-content { padding: 24px; flex: 1; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-title { font-size: 22px; font-weight: 700; }
.page-subtitle { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }

/* ─── Cards ──────────────────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeInUp 0.4s ease both;
}

.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.stat-card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}

.stat-card-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }

.stat-card-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}

.stat-card-icon.blue { background: rgba(37,99,235,0.1); color: var(--primary); }
.stat-card-icon.green { background: rgba(16,185,129,0.1); color: var(--success); }
.stat-card-icon.red { background: rgba(239,68,68,0.1); color: var(--danger); }
.stat-card-icon.yellow { background: rgba(245,158,11,0.1); color: var(--warning); }
.stat-card-icon.cyan { background: rgba(6,182,212,0.1); color: var(--info); }
.stat-card-icon.purple { background: rgba(139,92,246,0.1); color: #8b5cf6; }

.stat-card-value { font-size: 24px; font-weight: 700; }
.stat-card-change { font-size: 12px; margin-top: 4px; }
.stat-card-change.positive { color: var(--success); }
.stat-card-change.negative { color: var(--danger); }

/* ─── Charts ─────────────────────────────────────────────────── */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  animation: fadeInUp 0.5s ease both;
}

.chart-card-title { font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.chart-container { position: relative; height: 280px; }

/* ─── Tables ─────────────────────────────────────────────────── */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: fadeInUp 0.4s ease both;
}

.table-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap; gap: 12px;
}

.table-title { font-size: 15px; font-weight: 600; }

.table-wrapper { overflow-x: auto; }

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

thead th {
  background: var(--bg-tertiary);
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  white-space: nowrap;
}

tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
  white-space: nowrap;
}

tbody tr:hover { background: var(--bg-tertiary); }
tbody tr:last-child td { border-bottom: none; }

.text-right { text-align: right; }
.text-center { text-align: center; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ─── Forms ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.3px; }

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }

.search-box {
  position: relative;
  max-width: 300px;
}

.search-box input {
  padding-left: 36px;
}

.search-box svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 16px; height: 16px;
}

/* ─── Filters ────────────────────────────────────────────────── */
.filter-bar {
  display: flex; align-items: center; gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.filter-btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

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

/* ─── Badges ─────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-success { background: rgba(16,185,129,0.15); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-info { background: rgba(6,182,212,0.15); color: var(--info); }
.badge-primary { background: rgba(37,99,235,0.15); color: var(--primary); }

/* ─── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: all 0.3s ease;
  padding: 20px;
}

.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal { transform: scale(1); }
.modal-lg { max-width: 800px; }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-title { font-size: 18px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); padding: 4px; }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ─── Toast ──────────────────────────────────────────────────── */
#toast-container {
  position: fixed; top: 20px; right: 20px;
  z-index: 2000;
  display: flex; flex-direction: column; gap: 8px;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 12px;
  min-width: 280px;
  transform: translateX(120%);
  transition: transform 0.3s ease;
  font-size: 13px;
}

.toast.show { transform: translateX(0); }
.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-close { background: none; border: none; cursor: pointer; color: var(--text-muted); margin-left: auto; }

/* ─── Loader ─────────────────────────────────────────────────── */
#global-loader {
  position: fixed; inset: 0;
  background: rgba(255,255,255,0.7);
  z-index: 3000;
  display: none;
  align-items: center; justify-content: center;
}

[data-theme="dark"] #global-loader { background: rgba(0,0,0,0.5); }
#global-loader.active { display: flex; }

.loader-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* ─── Global Search ──────────────────────────────────────────── */
.global-search {
  position: relative;
  width: 280px;
}

.global-search input {
  width: 100%;
  padding: 8px 14px 8px 36px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
}

.global-search input:focus { outline: none; border-color: var(--primary); background: var(--bg-secondary); }
.global-search svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 16px; color: var(--text-muted); }

.search-results {
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  z-index: 200;
  display: none;
}

.search-results.active { display: block; }

.search-result-item {
  padding: 10px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition);
}

.search-result-item:hover { background: var(--bg-tertiary); }
.search-result-type { font-size: 10px; color: var(--text-muted); text-transform: uppercase; font-weight: 600; }
.search-result-title { font-size: 13px; font-weight: 500; }

/* ─── Theme Toggle ─────────────────────────────────────────────── */
.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 12px;
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  transition: all var(--transition);
  font-family: inherit;
}

.theme-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* ─── User Menu ──────────────────────────────────────────────── */
.user-menu {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.user-menu:hover { background: var(--bg-tertiary); }

.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 13px;
}

.user-name { font-size: 13px; font-weight: 500; }

/* ─── Empty State ────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state svg { width: 64px; height: 64px; margin-bottom: 16px; opacity: 0.4; }
.empty-state h3 { font-size: 16px; margin-bottom: 8px; color: var(--text-secondary); }
.empty-state p { font-size: 13px; margin-bottom: 20px; }

/* ─── Print Styles ───────────────────────────────────────────── */
@media print {
  .sidebar, .top-navbar, .btn, .filter-bar, .no-print { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .page-content { padding: 0; }
  .table-card, .stat-card, .chart-card { box-shadow: none; border: 1px solid #ddd; }
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .charts-grid { grid-template-columns: 1fr; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .menu-toggle { display: block; }
  .cards-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .global-search { width: 200px; }
  .page-content { padding: 16px; }
  .stat-card-value { font-size: 20px; }
}

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.fade-in { animation: fadeInUp 0.4s ease both; }

/* ─── Savings Card ───────────────────────────────────────────── */
.savings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.savings-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.savings-card h3 { font-size: 16px; margin-bottom: 4px; }
.savings-amount { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; }
.savings-progress { margin-bottom: 8px; }
.savings-percent { font-size: 12px; color: var(--text-muted); text-align: right; }

/* ─── Invoice Line Items ─────────────────────────────────────── */
.line-items-table input { width: 100%; padding: 6px 8px; border: 1px solid var(--border); border-radius: 4px; background: var(--bg-secondary); color: var(--text-primary); font-size: 13px; }
.line-items-table { margin-bottom: 16px; }

/* ─── Tabs ───────────────────────────────────────────────────── */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab {
  padding: 10px 20px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

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

/* ─── Report Section ─────────────────────────────────────────── */
.report-section { margin-bottom: 24px; }
.report-section h3 { font-size: 16px; font-weight: 600; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--primary); }
.report-total { font-weight: 700; font-size: 15px; }
.report-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.report-row.indent { padding-left: 24px; }