/* ===== RESET & BASE ===== */
:root {
  --bg-primary: #0a1628;
  --bg-secondary: #0f2240;
  --bg-card: #132d52;
  --bg-hover: #1a3a66;
  --border: #1e3f70;
  --border-light: #254d88;
  --text-primary: #f1f5f9;
  --text-secondary: #7fa8d4;
  --text-muted: #4a7ab0;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59,130,246,0.12);
  --success: #10b981;
  --success-bg: rgba(16,185,129,0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239,68,68,0.12);
  --warning: #f59e0b;
  --investment: #8b5cf6;
  --investment-bg: rgba(139,92,246,0.12);
  --sidebar-width: 240px;
  --bottom-nav-height: 68px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

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

/* ===== SIDEBAR (Desktop) ===== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 200;
  overflow-y: auto;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.sidebar-logo h1 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-logo p {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 1px;
}

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

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  margin: 1px 0;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.75;
  transition: opacity 0.15s;
}

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

.nav-item:hover svg { opacity: 1; }

.nav-item.active {
  background: var(--accent-light);
  color: var(--accent);
  border-left-color: var(--accent);
}

.nav-item.active svg { opacity: 1; }

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 28px 32px 40px;
  min-height: 100vh;
  max-width: 1200px;
}

/* ===== BOTTOM NAV (Mobile) ===== */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  z-index: 200;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
  padding: 10px 4px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  min-height: var(--bottom-nav-height);
  font-size: 10px;
  font-weight: 500;
}

.bottom-nav-item svg {
  width: 24px;
  height: 24px;
}

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

/* ===== PAGE HEADER ===== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

/* ===== MONTH NAVIGATOR ===== */
.month-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
}

.month-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 150px;
  text-align: center;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.15s;
}

.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ===== STAT CARDS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card.income::before { background: var(--success); }
.stat-card.expense::before { background: var(--danger); }
.stat-card.investment::before { background: var(--investment); }
.stat-card.net-positive::before { background: var(--accent); }
.stat-card.net-negative::before { background: var(--danger); }

.stat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

/* ===== CHARTS ===== */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.chart-card--wide {
  grid-column: 1 / -1;
}

.chart-container {
  position: relative;
  height: 240px;
}

.chart-container--tall {
  height: 280px;
}

/* ===== CARD ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

/* ===== LOADING ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 0;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.no-data {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 0;
  font-size: 14px;
}

/* ===== FORMS ===== */
.form-wrapper {
  max-width: 560px;
}

.form-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-label-hint {
  font-weight: 400;
  color: var(--text-muted);
}

.form-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

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

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237fa8d4' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

.form-select option { background: var(--bg-secondary); color: var(--text-primary); }
.form-select optgroup { background: var(--bg-secondary); color: var(--text-secondary); }

.input-prefix-wrap {
  position: relative;
}

.input-prefix {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 15px;
  pointer-events: none;
}

.form-input--prefixed {
  padding-left: 28px;
}

/* Remove number input arrows */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; }

/* ===== TYPE BADGE ===== */
.type-badge-row {
  margin: -8px 0;
}

.type-badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 500;
}

.type-badge--empty { background: var(--bg-hover); color: var(--text-muted); }
.type-badge--income { background: var(--success-bg); color: var(--success); }
.type-badge--expense { background: var(--danger-bg); color: var(--danger); }
.type-badge--investment { background: var(--investment-bg); color: var(--investment); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover:not(:disabled) { background: var(--bg-hover); color: var(--text-primary); }

.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-full { width: 100%; }

/* ===== ALERTS ===== */
.form-alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
}

.form-alert.hidden { display: none; }
.form-alert--success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(16,185,129,0.25); }
.form-alert--error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239,68,68,0.25); }

/* ===== FILTER BAR ===== */
.filter-bar {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}

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

.filter-select { min-width: 140px; flex-shrink: 0; }
.filter-date { width: 150px; flex-shrink: 0; }

.filter-row--dates {
  padding-top: 2px;
  border-top: 1px solid var(--border);
}

.form-label-inline {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ===== TABLE ===== */
.table-card { padding: 0; overflow: hidden; }

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  white-space: nowrap;
  user-select: none;
}

.data-table th.sortable { cursor: pointer; }
.data-table th.sortable:hover { color: var(--text-primary); }
.data-table th.text-right { text-align: right; }

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

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

.data-table tr.tx-row:hover td { background: rgba(255,255,255,0.02); }

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

.date-cell { white-space: nowrap; color: var(--text-secondary); font-size: 13px; }

.category-pill {
  background: var(--bg-hover);
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
}

.type-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

.type-dot--income { background: var(--success); }
.type-dot--expense { background: var(--danger); }
.type-dot--investment { background: var(--investment); }

.amount-cell { font-weight: 600; white-space: nowrap; }
.amount-cell--income { color: var(--success); }
.amount-cell--expense { color: var(--text-primary); }
.amount-cell--investment { color: var(--investment); }

.details-cell {
  color: var(--text-secondary);
  font-size: 13px;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.loading-cell, .empty-cell {
  text-align: center;
  padding: 48px;
  color: var(--text-muted);
}

.btn-delete {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 6px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  transition: all 0.15s;
}

.btn-delete:hover { background: var(--danger-bg); color: var(--danger); }

.tx-count {
  font-size: 13px;
  color: var(--text-muted);
}

.sort-indicator { font-size: 10px; margin-left: 3px; }

/* ===== BUDGET PAGE ===== */
.budget-summary {
  margin-bottom: 16px;
}

.budget-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.budget-summary-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.budget-summary-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.budget-summary-value {
  font-size: 22px;
  font-weight: 700;
}

.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-investment { color: var(--investment); }

.budget-categories {
  display: grid;
  gap: 10px;
}

.budget-row {
  padding: 14px 18px;
  transition: border-color 0.15s;
}

.budget-row--over {
  border-color: rgba(239,68,68,0.4);
  background: rgba(239,68,68,0.04);
}

.budget-row-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.budget-cat-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.budget-amounts {
  display: flex;
  align-items: center;
  gap: 6px;
}

.budget-spent {
  font-size: 14px;
  font-weight: 600;
}

.budget-divider { color: var(--text-muted); }

.budget-limit-wrap {
  position: relative;
}

.budget-limit-wrap .input-prefix {
  left: 8px;
  font-size: 13px;
}

.budget-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px 5px 20px;
  color: var(--text-primary);
  font-size: 13px;
  width: 110px;
  outline: none;
  transition: border-color 0.15s;
}

.budget-input:focus { border-color: var(--accent); }
.budget-input:disabled { opacity: 0.5; }

.progress-bar-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--bg-hover);
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 99px;
  transition: width 0.4s ease;
}

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

.progress-label {
  font-size: 12px;
  color: var(--text-muted);
  min-width: 32px;
  text-align: right;
}

.over-budget-badge {
  margin-top: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--danger);
}

/* ===== IMPORT PAGE ===== */
.import-info { margin-bottom: 16px; }

.import-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.csv-columns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.csv-col {
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(59,130,246,0.25);
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
  font-family: monospace;
}

.import-note {
  font-size: 12px;
  color: var(--text-muted);
}

.drop-zone-card { padding: 0; }

.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px 32px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-light);
}

.drop-icon { color: var(--text-muted); }

.drop-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.drop-subtext {
  font-size: 13px;
  color: var(--text-muted);
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.preview-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.preview-stat {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.preview-actions {
  display: flex;
  gap: 8px;
}

.status-ok {
  background: var(--success-bg);
  color: var(--success);
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
}

.import-errors {
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 12px;
  padding: 10px 16px;
  text-align: left;
}

/* ===== RESPONSIVE: MOBILE ===== */
@media (max-width: 768px) {
  .sidebar { display: none; }

  .main-content {
    margin-left: 0;
    padding: 16px 14px calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + 16px);
  }

  .bottom-nav {
    display: flex;
    justify-content: space-around;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .stat-value { font-size: 20px; }
  .stat-label { font-size: 11px; }

  .charts-grid {
    grid-template-columns: 1fr;
  }

  .chart-card--wide { grid-column: 1; }

  .page-title { font-size: 20px; }

  .filter-select { min-width: 100px; }
  .filter-date { width: 140px; }

  .month-label { min-width: 120px; font-size: 13px; }

  .budget-summary-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .budget-summary-value { font-size: 16px; }

  .budget-row-header { flex-wrap: wrap; gap: 8px; }

  .form-wrapper { max-width: 100%; }

  .data-table th, .data-table td { padding: 10px 12px; }
  .details-cell { max-width: 100px; }

  .preview-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-card { padding: 14px; }
  .stat-value { font-size: 18px; }

  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }

  .filter-row { flex-direction: column; align-items: stretch; }
  .filter-select, .filter-date, .search-wrap { width: 100%; min-width: 0; }

  .budget-summary-grid { grid-template-columns: 1fr; }

  .budget-input { width: 90px; }
}

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