/* ============================================================
   BudgetLens — Design System & Styles
   FT-Inspired Warm Editorial Theme
   ============================================================ */

/* --- Google Fonts (loaded in HTML) ---
   Playfair Display: 600, 700, 800 (headings — editorial serif)
   Inter: 400, 500, 600, 700 (body/data — clean sans-serif)
   ------------------------------------------------------------ */

/* === CSS Custom Properties === */
:root {
  /* Surface & Background — FT Warm Palette */
  --bg-primary: #FFF1E5;
  --bg-secondary: #FBF2EA;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FBF2EA;
  --bg-header: #33302E;
  --border-subtle: #E8DACE;
  --border-hover: #D4C4B5;

  /* Text — Warm Ink Tones */
  --text-primary: #33302E;
  --text-secondary: #66605C;
  --text-muted: #9E9893;
  --text-accent: #0D7680;
  --text-on-dark: #FFF1E5;
  --text-on-dark-secondary: rgba(255, 241, 229, 0.7);

  /* Category Colors — FT Editorial Palette */
  --color-personnel: #0D7680;
  --color-external: #990F3D;
  --color-overhead: #0F5499;
  --color-travel: #FF8833;
  --color-events: #CC0000;
  --color-rent: #00994D;
  --color-items-small: #593380;
  --color-items-large: #C2772E;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Radii — tighter, editorial */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Shadows — warm and subtle */
  --shadow-card: 0 1px 3px rgba(51, 48, 46, 0.06);
  --shadow-elevated: 0 4px 16px rgba(51, 48, 46, 0.1);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 0.9375rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --font-size-2xl: 1.75rem;
  --font-size-3xl: 2.25rem;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* === Layout === */
.app-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Header — Warm Dark Bar === */
.app-header {
  padding: var(--space-lg) var(--space-2xl);
  background: var(--bg-header);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-personnel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: #fff;
  flex-shrink: 0;
  font-family: var(--font-serif);
}

.header-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-on-dark);
}

.header-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-on-dark-secondary);
  font-weight: 400;
}

.header-manager {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--text-on-dark-secondary);
}

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

.header-manager-info {
  display: flex;
  flex-direction: column;
}

.header-manager-label {
  font-size: var(--font-size-xs);
  color: var(--text-on-dark-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.header-manager-name {
  font-weight: 600;
  color: var(--text-on-dark);
}

/* === Main Content === */
.main-content {
  flex: 1;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* === KPI Cards Row === */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  animation: cardEntrance 0.5s cubic-bezier(0.4, 0, 0.2, 1) both;
}

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

.kpi-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-elevated);
}

.kpi-card:nth-child(1) { animation-delay: 0ms; }
.kpi-card:nth-child(2) { animation-delay: 60ms; }
.kpi-card:nth-child(3) { animation-delay: 120ms; }
.kpi-card:nth-child(4) { animation-delay: 180ms; }

.kpi-card:nth-child(1)::before { background: var(--color-personnel); }
.kpi-card:nth-child(2)::before { background: var(--color-external); }
.kpi-card:nth-child(3)::before { background: var(--color-overhead); }
.kpi-card:nth-child(4)::before { background: var(--color-travel); }

.kpi-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.kpi-value {
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.kpi-detail {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

/* === Charts Section === */
.charts-section {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-xl);
  min-height: 480px;
}

.chart-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  animation: cardEntrance 0.5s cubic-bezier(0.4, 0, 0.2, 1) 200ms both;
}

.chart-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.chart-panel-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.chart-panel-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* === Breadcrumb === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  flex-wrap: wrap;
  margin-top: 2px;
}

.breadcrumb-item {
  color: var(--text-accent);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: 500;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: inherit;
}

.breadcrumb-item:hover {
  background: var(--bg-secondary);
}

.breadcrumb-item.active {
  color: var(--text-primary);
  cursor: default;
  font-weight: 600;
}

.breadcrumb-item.active:hover {
  background: none;
}

.breadcrumb-separator {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  user-select: none;
}

/* === Treemap === */
.treemap-container {
  flex: 1;
  position: relative;
  min-height: 0;
}

.treemap-container svg {
  width: 100%;
  height: 100%;
  display: block;
}

.treemap-tile {
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.treemap-tile:hover {
  opacity: 0.88;
}

.treemap-tile rect {
  transition: all var(--transition-normal);
}

.treemap-label {
  pointer-events: none;
  font-family: var(--font-sans);
  fill: #FFFFFF;
  font-weight: 600;
}

.treemap-label-amount {
  pointer-events: none;
  font-family: var(--font-sans);
  fill: rgba(255, 255, 255, 0.8);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

/* === Donut === */
.donut-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.donut-container svg {
  display: block;
}

.donut-center-text {
  font-family: var(--font-sans);
  text-anchor: middle;
}

.donut-center-label {
  fill: var(--text-muted);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.donut-center-value {
  fill: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-serif);
}

.donut-center-pct {
  fill: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.donut-arc {
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.donut-arc:hover {
  opacity: 0.8;
}

/* Donut legend */
.donut-legend {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: var(--space-md);
  width: 100%;
}

.donut-legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
}

.donut-legend-item:hover {
  background: var(--bg-secondary);
}

.donut-legend-item.active {
  background: var(--bg-secondary);
}

.donut-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

.donut-legend-label {
  flex: 1;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.donut-legend-value {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: var(--font-size-xs);
}

/* === Detail Table Section === */
.table-section {
  animation: cardEntrance 0.5s cubic-bezier(0.4, 0, 0.2, 1) 350ms both;
}

.table-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

.table-title-group {
  display: flex;
  flex-direction: column;
}

.table-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.table-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.table-search-wrapper {
  position: relative;
  width: 260px;
}

.table-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: var(--font-size-sm);
}

.table-search {
  width: 100%;
  padding: 8px 12px 8px 36px;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  outline: none;
  transition: all var(--transition-fast);
}

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

.table-search:focus {
  border-color: var(--text-accent);
  box-shadow: 0 0 0 3px rgba(13, 118, 128, 0.1);
}

.table-scroll {
  overflow-x: auto;
  overflow-y: auto;
  max-height: 440px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

thead {
  position: sticky;
  top: 0;
  z-index: 2;
}

thead th {
  padding: 12px var(--space-md);
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-subtle);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

thead th:hover {
  color: var(--text-primary);
}

thead th.sorted-asc::after,
thead th.sorted-desc::after {
  margin-left: 6px;
  font-size: 10px;
}

thead th.sorted-asc::after {
  content: '▲';
}

thead th.sorted-desc::after {
  content: '▼';
}

thead th:last-child {
  text-align: right;
}

tbody tr {
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-fast);
}

tbody tr:hover {
  background: var(--bg-card-hover);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody td {
  padding: 10px var(--space-md);
  color: var(--text-secondary);
  vertical-align: top;
}

tbody td:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

tbody td:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  white-space: nowrap;
}

.category-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.table-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.table-footer-total {
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

/* === Tooltip === */
.bl-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  background: var(--bg-header);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  box-shadow: var(--shadow-elevated);
  font-size: var(--font-size-sm);
  color: var(--text-on-dark);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  max-width: 320px;
}

.bl-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

.bl-tooltip-title {
  font-weight: 600;
  color: var(--text-on-dark);
  margin-bottom: 4px;
}

.bl-tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
}

.bl-tooltip-label {
  color: var(--text-on-dark-secondary);
}

.bl-tooltip-value {
  color: var(--text-on-dark);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* === Footer === */
.app-footer {
  padding: var(--space-lg) var(--space-2xl);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  background: var(--bg-secondary);
}

.footer-inner {
  max-width: 1600px;
  margin: 0 auto;
}

.footer-disclaimer {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 800px;
  margin: 0 auto;
}

/* === Animations === */
@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === Responsive === */
@media (max-width: 1200px) {
  .charts-section {
    grid-template-columns: 1fr 280px;
  }
}

@media (max-width: 1024px) {
  .charts-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .main-content {
    padding: var(--space-lg);
  }

  .app-header {
    padding: var(--space-md) var(--space-lg);
  }
}

@media (max-width: 640px) {
  .kpi-row {
    grid-template-columns: 1fr;
  }

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

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

  .table-search-wrapper {
    width: 100%;
  }

  .main-content {
    padding: var(--space-md);
  }

  .app-header {
    padding: var(--space-md);
  }

  .app-footer {
    padding: var(--space-md);
  }
}