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

:root {
  /* Color Palette - Premium Dark Theme */
  --bg-primary: #0a0e1a;
  --bg-secondary: #121829;
  --bg-tertiary: #1b233d;
  --accent-gold: #d4af37;
  --accent-gold-hover: #f3cf5a;
  --accent-gold-glow: rgba(212, 175, 55, 0.2);
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  --color-income: #10b981;
  --color-expense: #ef4444;
  --card-border: rgba(212, 175, 55, 0.15);
  --card-shadow: rgba(0, 0, 0, 0.4);
  --glass-bg: rgba(18, 24, 41, 0.7);
  --glass-blur: blur(12px);
  --font-family: 'Outfit', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f4f6fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecf4;
  --accent-gold: #b8931d;
  --accent-gold-hover: #9c7b14;
  --accent-gold-glow: rgba(184, 147, 29, 0.15);
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --color-income: #059669;
  --color-expense: #dc2626;
  --card-border: rgba(184, 147, 29, 0.2);
  --card-shadow: rgba(0, 0, 0, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-blur: blur(12px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s, color 0.3s;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

/* Header & Typography */
header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
}

header h1 {
  font-size: 1.25rem;
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

header h1 svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--accent-gold);
}

/* Bottom Navigation */
nav.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
  flex: 1;
  height: 100%;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  background: none;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  margin-bottom: 4px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  transition: var(--transition);
}

.nav-item.active {
  color: var(--accent-gold);
}

.nav-item.active svg {
  stroke: var(--accent-gold);
  transform: translateY(-2px);
}

/* Page Containers */
main {
  flex: 1;
  padding: 1.5rem;
  padding-bottom: 80px; /* Space for bottom nav */
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.page-view {
  display: none;
  animation: fadeIn 0.4s ease-out forwards;
}

.page-view.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Cards & Glassmorphism */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 32px var(--card-shadow);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 12px 40px var(--accent-gold-glow);
}

/* Dashboard Specific Styles */
.balance-card {
  background: radial-gradient(circle at top right, var(--bg-tertiary), var(--bg-secondary));
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--accent-gold);
}

.balance-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--accent-gold-glow) 0%, transparent 70%);
  pointer-events: none;
}

.balance-card .label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.balance-card .value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 1rem;
}

.balance-sub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.sub-balance-box {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 0.75rem;
  text-align: center;
}

.sub-balance-box .sub-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.sub-balance-box .sub-value {
  font-size: 1.125rem;
  font-weight: 600;
}

.sub-balance-box.income .sub-value {
  color: var(--color-income);
}

.sub-balance-box.expense .sub-value {
  color: var(--color-expense);
}

/* Opening Balance Controls */
.opening-balance-settings {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.opening-balance-settings button {
  background: none;
  border: 1px dashed var(--accent-gold);
  color: var(--accent-gold);
  padding: 0.4rem 1rem;
  border-radius: 8px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
}

.opening-balance-settings button:hover {
  background-color: var(--accent-gold-glow);
  border-style: solid;
}

/* Daily Breakdown Table */
.daily-table-container {
  overflow-x: auto;
  margin-top: 1rem;
}

.daily-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.daily-table th {
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  border-bottom: 2px solid var(--card-border);
}

.daily-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--card-border);
  font-size: 0.9rem;
}

.daily-table tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.cell-income {
  color: var(--color-income);
  font-weight: 500;
}

.cell-expense {
  color: var(--color-expense);
  font-weight: 500;
}

.cell-net {
  font-weight: 600;
}

.btn-override {
  background: none;
  border: 1px solid var(--text-muted);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-override:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  background-color: var(--accent-gold-glow);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

input[type="text"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px var(--accent-gold-glow);
}

textarea {
  min-height: 80px;
  resize: vertical;
}

/* Transaction Type Segmented Control */
.type-selector {
  display: flex;
  background-color: var(--bg-secondary);
  padding: 4px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  margin-bottom: 1.5rem;
}

.type-btn {
  flex: 1;
  text-align: center;
  padding: 0.6rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: none;
  color: var(--text-secondary);
}

.type-btn[data-type="income"].active {
  background-color: var(--color-income);
  color: white;
}

.type-btn[data-type="expense"].active {
  background-color: var(--color-expense);
  color: white;
}

.btn-primary {
  width: 100%;
  padding: 0.875rem;
  background: linear-gradient(135deg, var(--accent-gold), #b8931d);
  color: #000000;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
}

.btn-primary:active {
  transform: translateY(1px);
}

/* Chips/Tags Input */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.tag-chip {
  background-color: var(--bg-tertiary);
  color: var(--accent-gold);
  border: 1px solid var(--card-border);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.tag-chip button {
  background: none;
  border: none;
  color: var(--color-expense);
  cursor: pointer;
  font-weight: bold;
}

/* Data Sheet view */
.filter-search-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .filter-search-bar {
    grid-template-columns: 2fr 1fr;
  }
}

.search-wrapper {
  position: relative;
}

.search-wrapper input {
  padding-left: 2.5rem;
}

.search-wrapper svg {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  stroke: var(--text-muted);
}

.filter-toggle-btn {
  background-color: var(--bg-secondary);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 500;
  transition: var(--transition);
}

.filter-toggle-btn:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.advanced-filters {
  display: none;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
  animation: slideDown 0.3s ease-out;
}

@media (min-width: 576px) {
  .advanced-filters {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .advanced-filters {
    grid-template-columns: repeat(4, 1fr);
  }
}

.advanced-filters.open {
  display: grid;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Table grid on mobile / table on desktop */
.datasheet-container {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--bg-secondary);
}

.datasheet-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.datasheet-table th {
  padding: 1rem;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--card-border);
  cursor: pointer;
  user-select: none;
}

.datasheet-table th:hover {
  color: var(--accent-gold);
}

.datasheet-table th.income-header {
  background-color: #92d050;
  color: #000000;
}

.datasheet-table th.expense-header {
  background-color: #ff6b6b;
  color: #000000;
}

.datasheet-table td.excel-income-cell {
  background-color: #92d050;
  color: #000000;
  text-align: right;
  font-weight: 500;
}

.datasheet-table td.excel-expense-cell {
  background-color: #ff6b6b;
  color: #000000;
  text-align: right;
  font-weight: 500;
}

.datasheet-table th .sort-indicator {
  margin-left: 4px;
  font-size: 0.7rem;
}

.datasheet-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--card-border);
  font-size: 0.9rem;
}

.datasheet-table tr:last-child td {
  border-bottom: none;
}

.datasheet-table tr:hover {
  background-color: rgba(255, 255, 255, 0.015);
}

/* Card layout for mobile transactions list */
@media (max-width: 767px) {
  .datasheet-table, 
  .datasheet-table thead, 
  .datasheet-table tbody, 
  .datasheet-table th, 
  .datasheet-table td, 
  .datasheet-table tr {
    display: block;
  }
  
  .datasheet-table thead {
    display: none; /* Hide header on mobile, show details inside cards */
  }
  
  .datasheet-table tr {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    margin-bottom: 1rem;
    padding: 1rem;
  }

  .datasheet-table td {
    border-bottom: none;
    padding: 0.25rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .datasheet-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
  }
  
  .datasheet-table td.actions-cell {
    margin-top: 0.5rem;
    border-top: 1px dashed var(--card-border);
    padding-top: 0.5rem;
    justify-content: flex-end;
    gap: 0.75rem;
  }
}

.actions-cell {
  display: flex;
  gap: 0.5rem;
}

.btn-icon-only {
  background: none;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.btn-icon-only:hover {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
  background-color: var(--accent-gold-glow);
}

.btn-icon-only.delete-btn:hover {
  color: var(--color-expense);
  border-color: var(--color-expense);
  background-color: rgba(239, 68, 110, 0.1);
}

.btn-icon-only svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

/* Settings Styles */
.settings-section-title {
  font-size: 1.1rem;
  color: var(--accent-gold);
  margin-bottom: 1rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--card-border);
}

.settings-list-manager {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.5rem;
  background-color: var(--bg-secondary);
  margin-bottom: 1rem;
}

.settings-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  font-size: 0.9rem;
}

.settings-list-item:hover {
  background-color: var(--bg-tertiary);
}

.settings-list-item span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 80%;
}

.btn-add-item {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.btn-add-item input {
  flex: 1;
}

.btn-add-item button {
  width: auto;
  white-space: nowrap;
}

.settings-actions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.sync-reminder {
  border: 1px solid var(--accent-gold);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  background-color: rgba(212, 175, 55, 0.06);
}

.sync-reminder.due {
  border-color: var(--color-expense);
  background-color: rgba(239, 68, 68, 0.08);
}

.sync-reminder-title {
  color: var(--accent-gold);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.sync-reminder.due .sync-reminder-title {
  color: var(--color-expense);
}

.sync-reminder-copy {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.sync-reminder-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 576px) {
  .settings-actions-grid {
    grid-template-columns: 1fr 1fr;
  }

  .sync-reminder {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .sync-reminder-actions {
    grid-template-columns: 1fr 1fr;
    min-width: 320px;
  }
}

.btn-outline {
  padding: 0.75rem 1rem;
  border: 1px solid var(--accent-gold);
  background: none;
  color: var(--accent-gold);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-outline:hover {
  background-color: var(--accent-gold-glow);
}

.btn-danger {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-expense);
  background: none;
  color: var(--color-expense);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-danger:hover {
  background-color: rgba(239, 68, 68, 0.1);
}

/* Modals & Overlays */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 1rem;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background-color: var(--bg-secondary);
  border: 1px solid var(--accent-gold);
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  transform: translateY(-20px);
  transition: transform 0.3s ease;
  overflow: hidden;
}

.modal-overlay.open .modal-content {
  transform: translateY(0);
}

.modal-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  color: var(--accent-gold);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* File inputs styler */
.file-upload-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
  width: 100%;
}

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

/* QR Code Section */
.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.qr-canvas-wrapper {
  background: white;
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.qr-camera-view {
  width: 100%;
  max-width: 320px;
  height: 240px;
  background-color: black;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}

.qr-scan-placeholder {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
  font-size: 0.9rem;
  padding: 1rem;
}

/* Banner/Notification */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 90%;
  max-width: 400px;
}

.toast {
  background-color: var(--bg-tertiary);
  border-left: 4px solid var(--accent-gold);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  font-size: 0.9rem;
  animation: slideInTop 0.3s ease-out;
}

.toast.success {
  border-left-color: var(--color-income);
}

.toast.error {
  border-left-color: var(--color-expense);
}

@keyframes slideInTop {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Quick Floating Add Button (Optional, standard on Android app) */
.fab-btn {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-gold), #b8931d);
  color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
  cursor: pointer;
  border: none;
  z-index: 99;
  transition: var(--transition);
}

.fab-btn:hover {
  transform: scale(1.08) rotate(90deg);
}

.fab-btn svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
}