:root {
  --bg-primary: #0b0f1a;
  --bg-secondary: #1a1f2e;
  --bg-tertiary: #252a3a;
  --bg-card: rgba(255, 255, 255, 0.05);

  --neon-cyan: #00eaff;
  --neon-green: #00ff95;
  --neon-purple: #8b5cf6;
  --neon-orange: #f59e0b;

  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --text-danger: #ff4444;
  --text-success: #00ff95;

  --border-color: rgba(255, 255, 255, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
  --transition-fast: 0.18s ease-out;
  --transition: 0.25s ease-out;

  --max-width: 1200px;
  --container-x: clamp(1rem, 4vw, 2.25rem);

  --font-primary: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-bangla: "Noto Sans Bengali", "Inter", system-ui, sans-serif;
}

[lang="bn"] { font-family: var(--font-bangla); }
[lang="en"] { font-family: var(--font-primary); }

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Background */
.bg-animation {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 0 0, #00eaff22 0, transparent 60%),
              radial-gradient(circle at 100% 100%, #00ff9520 0, transparent 55%),
              linear-gradient(135deg, #050814 0%, #111827 50%, #020617 100%);
}

/* Layout */
.main-content {
  max-width: var(--max-width);
  padding: 80px var(--container-x) 2.5rem;
  margin: 0 auto;
}

/* Navbar */
.navbar {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 26, 0.9);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-inline: var(--container-x);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 60px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  background: linear-gradient(120deg, var(--neon-cyan), var(--neon-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links-wrapper {
  flex: 1;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  padding: 0;
  margin: 0;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  position: relative;
  padding-block: 0.25rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green));
  transition: width var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--neon-cyan);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-controls select {
  background: var(--bg-card);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
}

/* Mobile nav */
.nav-toggle {
  display: none;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 1.25rem;
}

/* Hero / page headers */
.hero-section,
.page-header {
  text-align: left;
  margin-bottom: 1.75rem;
}

.hero-title,
.page-title {
  font-size: clamp(1.8rem, 3.1vw, 2.4rem);
  margin: 0 0 0.35rem;
  background: linear-gradient(120deg, var(--neon-cyan), var(--neon-green), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle,
.page-subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* KPI cards */
.kpi-grid,
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.kpi-card,
.summary-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kpi-title {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kpi-icon {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  background: #020617;
}

.kpi-icon.income { color: var(--text-success); }
.kpi-icon.expense { color: var(--text-danger); }
.kpi-icon.savings { color: var(--neon-cyan); }
.kpi-icon.burn-rate { color: var(--neon-orange); }

.kpi-value {
  font-size: 1.4rem;
  font-weight: 600;
}

.kpi-change {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.kpi-change.positive { color: var(--text-success); }
.kpi-change.negative { color: var(--text-danger); }

/* Charts */
.charts-section,
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.chart-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  min-height: 280px;
}

.chart-container.large {
  grid-column: 1 / -1;
  min-height: 320px;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.chart-title {
  font-size: 1rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chart-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.chart-period-selector {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.8rem;
  padding: 0.25rem 0.55rem;
}

.chart-toggle {
  border-radius: 999px;
  border: 1px solid var(--border-color);
  width: 32px;
  height: 32px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.chart-wrapper {
  position: relative;
  flex: 1;
  min-height: 160px;
  margin-top: 0.35rem;
}

.chart-canvas {
  position: absolute;
  inset: 0;
}

/* Ensure ECharts auto-resizes */
.chart-canvas canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-loading,
.chart-empty {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.chart-loading.active,
.chart-empty.active {
  display: flex;
}

.chart-empty i {
  font-size: 1.7rem;
  margin-bottom: 0.3rem;
}

/* Legend */
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  margin-top: 0.7rem;
  font-size: 0.8rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.7);
}

.legend-color {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.legend-label {
  color: var(--text-secondary);
}

.legend-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Budget section */
.budget-section {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.1rem 1.2rem 1.2rem;
}

.budget-title {
  margin: 0 0 0.9rem;
  font-size: 1rem;
}

.budget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.8rem;
}

.budget-item {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.budget-info {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.budget-category {
  font-weight: 500;
}

.budget-amount {
  color: var(--text-secondary);
  text-align: right;
}

.budget-progress {
  height: 6px;
  border-radius: 999px;
  background: #020617;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--neon-green), var(--neon-cyan));
  width: 0;
}

.progress-bar.over-budget {
  background: linear-gradient(90deg, #f97373, var(--neon-orange));
}

/* Tables / transactions */
.filters-section,
.transactions-section,
.settings-card,
.predictions-section {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.5rem;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.75rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
}

.filter-label {
  color: var(--text-secondary);
}

.filter-input {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.6rem;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.filter-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.8rem;
  flex-wrap: wrap;
}

.transactions-section {
  padding: 0;
}

.table-header {
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.table-title {
  margin: 0;
  font-size: 0.95rem;
}

.table-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
}

.search-input {
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.4rem 0.7rem 0.4rem 0.7rem;
  font-size: 0.85rem;
}

.search-icon {
  position: absolute;
  right: 0.45rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.table-container {
  position: relative;
  overflow-x: auto;
}

.transactions-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.transactions-table th,
.transactions-table td {
  padding: 0.55rem 0.75rem;
  font-size: 0.82rem;
}

.transactions-table thead {
  background: rgba(15, 23, 42, 0.9);
}

.table-header-cell {
  text-align: left;
  color: var(--text-secondary);
  font-weight: 500;
}

.table-body-row:nth-child(even) {
  background: rgba(15, 23, 42, 0.4);
}

.table-body-row:hover {
  background: rgba(15, 23, 42, 0.7);
}

.transaction-type {
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  font-size: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.transaction-type.income {
  color: var(--text-success);
  background: #052e16;
}

.transaction-type.expense {
  color: var(--text-danger);
  background: #450a0a;
}

.transaction-type.debtor {
  color: var(--neon-cyan);
  background: #0b1120;
}

.transaction-type.creditor {
  color: var(--neon-orange);
  background: #451a03;
}

.transaction-amount {
  font-weight: 500;
}

.transaction-actions {
  display: inline-flex;
  gap: 0.3rem;
}

.action-btn {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  cursor: pointer;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem 1rem;
  flex-wrap: wrap;
}

.page-btn {
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.8rem;
}

.page-info {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Settings grid */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
}

/* Forms / controls */
.form-group {
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
}

.form-label {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.form-input,
.form-select,
textarea.form-input {
  width: 100%;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.6rem;
  color: var(--text-primary);
  font-size: 0.9rem;
}

textarea.form-input {
  min-height: 60px;
}

.amount-input-wrapper {
  position: relative;
}

.currency-display {
  position: absolute;
  right: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Buttons */
.btn {
  border-radius: var(--radius-sm);
  border: none;
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-primary {
  background: linear-gradient(120deg, var(--neon-cyan), var(--neon-green));
  color: #020617;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
}

/* FAB */
.add-transaction-btn {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  width: 50px;
  height: 50px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
  color: #020617;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-soft);
  cursor: pointer;
}

/* Notification */
.notification {
  position: fixed;
  right: 1.2rem;
  top: 4.5rem;
  max-width: 280px;
  padding: 0.65rem 0.85rem;
  font-size: 0.8rem;
  border-radius: var(--radius-md);
  background: #020617e6;
  border: 1px solid var(--border-color);
  transform: translateX(120%);
  transition: transform var(--transition-fast);
  z-index: 40;
}

.notification.show {
  transform: translateX(0);
}

/* Offline */
.offline-indicator {
  position: fixed;
  inset-inline: 50%;
  transform: translateX(-50%);
  bottom: 0.75rem;
  padding: 0.45rem 0.8rem;
  font-size: 0.8rem;
  border-radius: 999px;
  background: #020617e6;
  border: 1px solid var(--border-color);
}

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 60;
}

.modal.open {
  display: flex;
}

.modal-content {
  width: min(480px, 94vw);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1rem 1.1rem 1.1rem;
  box-shadow: var(--shadow-soft);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.modal-title {
  margin: 0;
  font-size: 1.05rem;
}

.modal-close {
  border-radius: 999px;
  border: none;
  width: 30px;
  height: 30px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.9rem;
}

/* Auth page */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem var(--container-x);
}

.auth-card {
  width: min(420px, 100%);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-soft);
}

/* Loading overlay */
.loading-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.78);
}

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

.loading-spinner {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 3px solid rgba(148, 163, 184, 0.5);
  border-top-color: var(--neon-cyan);
  animation: spin 0.8s linear infinite;
}

/* Empty state */
.empty-state {
  padding: 1.4rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.empty-icon {
  font-size: 2.1rem;
  margin-bottom: 0.4rem;
}

/* Utilities */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  border: 0;
  clip: rect(0, 0, 0, 0);
}

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

/* Responsive */
@media (max-width: 900px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
  .chart-container.large {
    min-height: 280px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding-inline: calc(var(--container-x) * 0.7);
  }
  .nav-links-wrapper {
    position: fixed;
    inset-inline: 0;
    top: 60px;
    background: rgba(15, 23, 42, 0.98);
    border-bottom: 1px solid var(--border-color);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-fast);
  }
  .nav-links-wrapper.open {
    max-height: 220px;
  }
  .nav-links {
    flex-direction: column;
    padding: 0.6rem var(--container-x) 0.75rem;
  }
  .nav-controls {
    margin-left: auto;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .main-content {
    padding-inline: calc(var(--container-x) * 0.7);
  }
  .table-header {
    padding-inline: 0.9rem;
  }
}

@media (max-width: 600px) {
  .kpi-grid,
  .summary-grid,
  .budget-grid,
  .settings-grid,
  .filters-grid {
    grid-template-columns: 1fr;
  }
  .transactions-table {
    min-width: 640px;
  }
  .page-header {
    margin-bottom: 1.25rem;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.05rem;
  }
  .page-title,
  .hero-title {
    font-size: 1.6rem;
  }
  .add-transaction-btn {
    width: 46px;
    height: 46px;
    right: 0.9rem;
    bottom: 0.9rem;
  }
}