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

/* ============================
   CSS CUSTOM PROPERTIES
   ============================ */
:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #3730a3;
  --secondary: #0ea5e9;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;

  --bg-dark: #0f0f1a;
  --bg-card: #161628;
  --bg-card2: #1e1e35;
  --bg-glass: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --border-focus: rgba(79,70,229,0.5);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --sidebar-w: 260px;
  --topbar-h: 64px;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================
   RESET & BASE
   ============================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* ============================
   LAYOUT
   ============================ */
#app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-logo {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-logo .logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}

.sidebar-logo .logo-text {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-logo .logo-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 12px;
  margin-bottom: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

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

.nav-item.active {
  background: rgba(79, 70, 229, 0.15);
  color: var(--primary-light);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%; transform: translateY(-50%);
  width: 3px; height: 20px;
  background: var(--primary-light);
  border-radius: 0 4px 4px 0;
}

.nav-icon { font-size: 1.1rem; width: 20px; text-align: center; }

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

/* Topbar */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fy-badge {
  background: rgba(79, 70, 229, 0.2);
  color: var(--primary-light);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(79, 70, 229, 0.3);
}

/* Page content */
.page-content {
  flex: 1;
  padding: 32px;
  max-width: 1400px;
  width: 100%;
}

/* ============================
   COMPONENTS
   ============================ */

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(79,70,229,0.2);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Stat cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60px; height: 60px;
  border-radius: 0 var(--radius) 0 60px;
  opacity: 0.15;
}

.stat-card.purple::after { background: var(--primary); }
.stat-card.blue::after { background: var(--secondary); }
.stat-card.green::after { background: var(--success); }
.stat-card.amber::after { background: var(--warning); }
.stat-card.red::after { background: var(--danger); }

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: rgba(79,70,229,0.3);
}

.stat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-icon.purple { background: rgba(79,70,229,0.15); }
.stat-icon.blue { background: rgba(14,165,233,0.15); }
.stat-icon.green { background: rgba(16,185,129,0.15); }
.stat-icon.amber { background: rgba(245,158,11,0.15); }
.stat-icon.red { background: rgba(239,68,68,0.15); }

.stat-info { flex: 1; }
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  margin-top: 4px;
}
.stat-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); }

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #059669; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; }

.btn-warning { background: var(--warning); color: #1a1a1a; }
.btn-warning:hover { background: #d97706; }

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 1px solid var(--primary-light);
}
.btn-outline:hover { background: rgba(99,102,241,0.1); }

.btn-sm { padding: 5px 10px; font-size: 0.8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

.btn-icon {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-icon:hover { color: var(--text-primary); border-color: var(--primary-light); }

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

.form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 10px 14px;
  font-size: 0.875rem;
  font-family: 'Inter', sans-serif;
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
}

.form-control::placeholder { color: var(--text-muted); }

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748b'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  padding-right: 36px;
}

.form-row {
  display: grid;
  gap: 16px;
}
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }
.form-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-row.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Input number formatting */
.form-control[type="number"] { font-family: 'JetBrains Mono', monospace; }

/* Table */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

table.data-table thead th {
  background: var(--bg-card2);
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

table.data-table tbody tr {
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: var(--transition);
}

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

table.data-table tbody td {
  padding: 12px 16px;
  color: var(--text-primary);
  vertical-align: middle;
}

table.data-table td.mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
}

table.data-table td.amount {
  font-family: 'JetBrains Mono', monospace;
  text-align: right;
  font-size: 0.85rem;
}

table.data-table th.amount {
  text-align: right;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge-success { background: rgba(16,185,129,0.15); color: #34d399; }
.badge-warning { background: rgba(245,158,11,0.15); color: #fbbf24; }
.badge-danger { background: rgba(239,68,68,0.15); color: #f87171; }
.badge-info { background: rgba(6,182,212,0.15); color: #22d3ee; }
.badge-purple { background: rgba(99,102,241,0.15); color: #818cf8; }
.badge-gray { background: rgba(100,116,139,0.15); color: #94a3b8; }

/* Search bar */
.search-bar {
  position: relative;
  flex: 1;
  max-width: 360px;
}
.search-bar .search-icon {
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}
.search-bar input {
  padding-left: 36px;
}

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-card2);
  position: relative;
}

.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--primary);
  background: rgba(79,70,229,0.05);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.upload-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.upload-subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 24px;
  width: fit-content;
}

.tab-btn {
  padding: 8px 20px;
  border-radius: 6px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--primary);
  color: white;
}

.tab-btn:hover:not(.active) {
  color: var(--text-primary);
  background: var(--bg-glass);
}

/* IT Statement print styles */
.it-statement {
  background: white;
  color: #1a1a1a;
  font-family: 'Inter', sans-serif;
  padding: 32px;
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.it-statement-header {
  text-align: center;
  border-bottom: 2px solid #1a1a1a;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.it-statement-header h2 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
}

.it-statement-header p {
  font-size: 0.85rem;
  margin-top: 4px;
}

.it-statement .emp-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.85rem;
}

.it-statement table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  margin-bottom: 16px;
}

.it-statement table th,
.it-statement table td {
  border: 1px solid #ccc;
  padding: 5px 8px;
  text-align: right;
}

.it-statement table th {
  background: #f0f0f0;
  text-align: center;
  font-weight: 600;
}

.it-statement table td:first-child,
.it-statement table th:first-child {
  text-align: left;
}

.it-statement .tax-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.it-statement .tax-table td.label {
  width: 70%;
  text-align: left;
}

.it-statement .highlight-row {
  font-weight: 700;
  background: #f8f8f8;
}

.it-statement .total-row {
  font-weight: 700;
  background: #e8f4f8;
}

/* Regime toggle */
.regime-toggle {
  display: flex;
  gap: 4px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
}

.regime-btn {
  padding: 6px 16px;
  border-radius: 6px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition);
  color: var(--text-muted);
}

.regime-btn.active.new { background: linear-gradient(135deg, #4f46e5, #06b6d4); color: white; }
.regime-btn.active.old { background: linear-gradient(135deg, #f59e0b, #ef4444); color: white; }
.regime-btn:hover:not(.active) { color: var(--text-primary); background: var(--bg-glass); }

/* Loader / Spinner */
.spinner {
  width: 24px; height: 24px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  min-width: 280px;
  animation: slideIn 0.3s ease;
}

.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); }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(24px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  padding: 20px;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 700px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

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

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
}

/* Number formatting */
.amount-positive { color: var(--success); }
.amount-negative { color: var(--danger); }
.amount-neutral { color: var(--text-muted); }

/* Divider */
.divider { height: 1px; background: var(--border); margin: 20px 0; }

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

.empty-state .empty-icon { font-size: 3.5rem; margin-bottom: 16px; display: block; opacity: 0.5; }
.empty-state h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { font-size: 0.875rem; }

/* Progress bar */
.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 8px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 999px;
  transition: width 0.6s ease;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

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

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.flex-1 { flex: 1; }

/* Spacing */
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mt-4 { margin-top: 16px; }
.p-4 { padding: 16px; }

/* ============================
   PRINT STYLES
   ============================ */
@media print {
  @page {
    size: A4 portrait;
    margin: 6mm 8mm 5mm 8mm;
  }
  * { box-sizing: border-box; }
  html, body {
    background: #fff !important;
    color: #000 !important;
    font-size: 7.8pt !important;
    line-height: 1.15 !important;
    margin: 0 !important;
    padding: 0 !important;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }
  .sidebar, .topbar, .no-print { display: none !important; }
  .main-content { margin-left: 0 !important; padding: 0 !important; }
  .page-content { padding: 0 !important; margin: 0 !important; }
  .card {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
    background: transparent !important;
  }
  .it-statement {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 auto !important;
    max-width: 100% !important;
    width: 100% !important;
    color: #000 !important;
    background: #fff !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }
  .it-statement table {
    margin-bottom: 4px !important;
    font-size: 7pt !important;
    width: 100% !important;
    border-collapse: collapse !important;
  }
  .it-statement table th,
  .it-statement table td {
    padding: 1.8px 3.5px !important;
    line-height: 1.12 !important;
    border: 1px solid #555 !important;
  }
  .it-statement table th {
    background: #f1f5f9 !important;
    font-weight: 700 !important;
    text-align: center !important;
  }
  .it-statement .it-statement-header {
    padding-bottom: 4px !important;
    margin-bottom: 5px !important;
  }
  .it-statement .it-statement-header h2 {
    font-size: 0.95rem !important;
    margin: 2px 0 !important;
  }
  .it-statement .emp-details {
    padding: 3px 6px !important;
    margin-bottom: 5px !important;
    font-size: 7.2pt !important;
  }
  .it-statement .tax-section {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 10px !important;
    margin-top: 4px !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }
  .it-statement .callout-box {
    margin-top: 4px !important;
  }
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .page-content { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row.cols-3, .form-row.cols-4 { grid-template-columns: 1fr 1fr; }
  .form-row.cols-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}