:root {
  --whc-primary: #6366f1;
  --whc-primary-dark: #4f46e5;
  --whc-primary-glow: rgba(99, 102, 241, 0.15);
  --whc-bg-app: rgba(255, 255, 255, 0.85);
  --whc-bg-card: #ffffff;
  --whc-border: #e5e7eb;
  --whc-text: #111827;
  --whc-text-muted: #4b5563;
  --whc-glass-border: rgba(255, 255, 255, 0.6);
  --whc-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --whc-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --whc-shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --whc-primary: #818cf8;
    --whc-primary-dark: #6366f1;
    --whc-primary-glow: rgba(129, 140, 248, 0.2);
    --whc-bg-app: rgba(15, 23, 42, 0.85);
    --whc-bg-card: #1e293b;
    --whc-border: rgba(255, 255, 255, 0.1);
    --whc-text: #f3f4f6;
    --whc-text-muted: #9ca3af;
    --whc-glass-border: rgba(255, 255, 255, 0.05);
  }
}

.whc-calculator-app *,
.whc-calculator-app *::before,
.whc-calculator-app *::after {
  box-sizing: border-box;
}

.whc-calculator-app {
  margin: 0;
  padding: 24px;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--whc-text);
  display: flex;
  justify-content: center;
  width: 100%;
  transition: background 0.3s ease;
}

.whc-calculator-app .app {
  width: 100%;
  max-width: 900px;
  background: var(--whc-bg-app);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--whc-glass-border);
  border-radius: 24px;
  padding: 32px;
  box-shadow: var(--whc-shadow-lg);
  position: relative;
}

.whc-calculator-app .header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
}

.whc-calculator-app .header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.whc-calculator-app .backup-controls {
  display: flex;
  gap: 4px;
}

.whc-calculator-app .mini-btn {
  padding: 4px 10px;
  font-size: 11px;
  min-height: 28px;
  border-radius: 6px;
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #cbd5e1;
  box-shadow: none;
}

.whc-calculator-app .mini-btn:hover {
  background: #e2e8f0;
  border-color: #94a3b8;
  transform: none;
}

.whc-calculator-app .language-switcher {
  display: flex;
  gap: 4px;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  padding: 2px;
  background: #f8fafc;
}

.whc-calculator-app .lang-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: #475569;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.whc-calculator-app .lang-btn:hover {
  background: #f1f5f9;
  color: #334155;
}

.whc-calculator-app .lang-btn.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(102, 126, 234, 0.2);
}

.whc-calculator-app .title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.whc-calculator-app .subtitle {
  margin: 2px 0 0;
  font-size: 13px;
  color: #4b5563;
}

.whc-calculator-app .note {
  font-size: 12px;
  color: #6b7280;
}

.whc-calculator-app .tabs {
  display: flex;
  gap: 6px;
  margin: 10px 0 14px;
}

.whc-calculator-app .tab {
  flex: 1;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--whc-border);
  background: var(--whc-bg-card);
  color: var(--whc-text-muted);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 14px;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .whc-calculator-app .header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
  }

  .whc-calculator-app .header-right {
    align-items: center;
    width: 100%;
  }

  .whc-calculator-app .tabs {
    gap: 4px;
  }

  .whc-calculator-app .tab {
    padding: 10px 8px;
    font-size: 12px;
  }
}

.whc-calculator-app .tab:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: #334155;
}

.whc-calculator-app .tab.active {
  background: var(--whc-primary);
  color: #ffffff;
  border-color: var(--whc-primary);
  box-shadow: 0 8px 20px var(--whc-primary-glow);
  transform: translateY(-1px);
}

.whc-calculator-app .tab-panel {
  display: none;
  gap: 12px;
  flex-direction: column;
}

.whc-calculator-app .tab-panel.active {
  display: flex;
}

@media (max-width: 400px) {
  .whc-calculator-app .tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
}

.whc-calculator-app .card {
  border: 1px solid var(--whc-border);
  border-radius: 16px;
  background: var(--whc-bg-card);
  margin-bottom: 24px;
  overflow: hidden;
  box-shadow: var(--whc-shadow);
  transition: all 0.3s ease;
}

.whc-calculator-app .card:hover {
  box-shadow: var(--whc-shadow-lg);
  transform: translateY(-2px);
}

.whc-calculator-app .card-header {
  padding: 16px 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-bottom: 2px solid #e5e7eb;
}

.whc-calculator-app .card-header .card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: #1e293b;
  letter-spacing: -0.01em;
}

.whc-calculator-app .card-body {
  padding: 20px;
}

.whc-calculator-app .panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.whc-calculator-app .field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.whc-calculator-app label {
  font-size: 13px;
  font-weight: 600;
  color: #475569;
  margin-bottom: 2px;
  display: block;
}

.whc-calculator-app input[type="time"],
.whc-calculator-app input[type="date"],
.whc-calculator-app input[type="week"],
.whc-calculator-app input[type="month"],
.whc-calculator-app input[type="number"] {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--whc-border);
  background: var(--whc-input-bg);
  font-size: 14px;
  color: var(--whc-text);
  outline: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.whc-calculator-app input:hover {
  border-color: var(--whc-primary);
}

.whc-calculator-app input:focus {
  border-color: var(--whc-primary);
  box-shadow: 0 0 0 4px var(--whc-primary-glow);
  background: var(--whc-bg-card);
}

.whc-calculator-app .inline-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #1f2937;
}

.whc-calculator-app .slots {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.whc-calculator-app .slots-header {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) 45px;
  gap: 12px;
  padding: 0 17px 0 16px;
  /* Added 1px right padding to align with row border */
  margin-bottom: 8px;
}

.whc-calculator-app .header-item {
  font-size: 11px;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
}

.whc-calculator-app .slot-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) 45px;
  gap: 12px;
  align-items: center;
  padding: 8px 16px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  transition: all 0.2s ease;
}

.whc-calculator-app .slot-row:hover {
  border-color: #cbd5e1;
  background: #f8fafc;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.whc-calculator-app .slot-row.overlap-conflict {
  border-color: #fecaca !important;
  background: #fffafa !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1), inset 0 0 8px rgba(239, 68, 68, 0.05) !important;
  animation: overlap-pulse 2s infinite;
}

@keyframes overlap-pulse {
  0% { box-shadow: 0 0 0 0px rgba(239, 68, 68, 0.2); }
  70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0px rgba(239, 68, 68, 0); }
}

.whc-calculator-app .slot-row button.remove-slot {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 18px;
  line-height: 1;
  background: #fee2e2;
  color: #ef4444;
  border: none;
  box-shadow: none;
}

.whc-calculator-app .slot-row button.remove-slot:hover {
  background: #fecaca;
  color: #dc2626;
  transform: scale(1.1);
}

@media (max-width: 640px) {
  .whc-calculator-app .slots-header {
    display: none !important;
  }

  .whc-calculator-app .slot-row {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 16px;
  }

  .whc-calculator-app .slot-row .field {
    position: relative;
  }

  /* Re-add labels for mobile since header is hidden */
  .whc-calculator-app .slot-row .field::before {
    content: attr(data-label);
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
    margin-bottom: 4px;
  }

  .whc-calculator-app .slot-row button.remove-slot {
    width: 100%;
    border-radius: 8px;
    height: 40px;
    font-size: 14px;
    margin-top: 4px;
  }
}

.whc-calculator-app .week-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}

.whc-calculator-app .week-card {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: #f9fafb;
}

.whc-calculator-app .week-card .week-day-title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  color: #111827;
}

.whc-calculator-app .controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0;
}

.whc-calculator-app button {
  background: var(--whc-primary);
  color: #fff;
  border: 1px solid var(--whc-primary-dark);
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.whc-calculator-app button:hover {
  background: linear-gradient(135deg, #5568d3 0%, #6a3f8f 100%);
  border-color: #5568d3;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  transform: translateY(-1px);
}

.whc-calculator-app button:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(102, 126, 234, 0.2);
}

.whc-calculator-app button.secondary {
  background: #ffffff;
  color: #475569;
  border-color: #cbd5e1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.whc-calculator-app button.secondary:hover {
  background: #f8fafc;
  border-color: #94a3b8;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.whc-calculator-app button.ghost {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  color: #475569;
  border: 2px dashed #cbd5e1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  width: 100%;
  margin-top: 4px;
}

.whc-calculator-app button.ghost:hover {
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  border-color: #94a3b8;
  border-style: solid;
  color: #334155;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.whc-calculator-app .result {
  border: 1px solid var(--whc-border);
  border-radius: 16px;
  padding: 24px;
  background: var(--whc-bg-app);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-top: 20px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.whc-calculator-app .result-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.whc-calculator-app .result-label {
  font-size: 13px;
  color: #4b5563;
}

.whc-calculator-app .result-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--whc-primary);
  letter-spacing: -0.03em;
}

.whc-calculator-app .muted {
  color: #6b7280;
  font-size: 13px;
}

.whc-calculator-app .small {
  font-size: 12px;
}

.whc-calculator-app .table {
  width: 100%;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
}

.whc-calculator-app .table-head,
.whc-calculator-app .table-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 10px;
  padding: 10px 12px;
}

.whc-calculator-app .annual-table .table-head,
.whc-calculator-app .annual-table .table-row {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

.whc-calculator-app .table-head {
  background: #f3f6fb;
  font-weight: 700;
  color: #1f2937;
}

.whc-calculator-app .table-row:nth-child(odd) {
  background: #fbfcfe;
}

.whc-calculator-app .toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  background: #111827;
  color: #f8fafc;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  display: none;
  gap: 10px;
  align-items: center;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.2);
  z-index: 9999;
  /* ensure toast is on top */
}

.whc-calculator-app .toast.visible {
  display: inline-flex;
}

.whc-calculator-app .toast-close {
  background: transparent;
  color: #cdd2d7;
  border: none;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
}

.whc-calculator-app .toast-close:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* Print styles */
@media print {

  .whc-calculator-app,
  body {
    background: white !important;
  }

  .whc-calculator-app .app {
    box-shadow: none !important;
    border: none !important;
    max-width: 100% !important;
  }

  .whc-calculator-app .tabs,
  .whc-calculator-app .controls,
  .whc-calculator-app button,
  .whc-calculator-app .card-header,
  .whc-calculator-app .panel-header,
  .whc-calculator-app .inline-checkbox,
  #addSlotBtn,
  #slots,
  .whc-calculator-app .week-grid,
  .whc-calculator-app input {
    display: none !important;
  }

  .whc-calculator-app .card {
    border: none !important;
    box-shadow: none !important;
    page-break-inside: avoid;
  }

  .whc-calculator-app .result {
    border: 1px solid #000 !important;
    background: white !important;
  }

  .whc-calculator-app .table {
    border: 1px solid #000 !important;
  }

  .whc-calculator-app .table-head,
  .whc-calculator-app .table-row {
    border-bottom: 1px solid #000 !important;
  }
}

/* Responsive Button Fix */
.whc-calculator-app button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 16px;
  min-height: 42px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
  line-height: 1.2;
}

.whc-calculator-app button.secondary {
  font-size: 13px;
  padding: 10px 14px;
}

.whc-calculator-app button.ghost {
  white-space: normal;
  text-align: center;
}

@media (max-width: 640px) {
  .whc-calculator-app button {
    width: 100%;
    font-size: 13px;
    padding: 12px 14px;
  }

  .whc-calculator-app button.secondary {
    font-size: 12.5px;
  }

  /* Daily Tab Responsive Fixes */
  .whc-calculator-app .slot-row {
    padding: 12px;
    gap: 16px;
    /* Ensure fields are stacked with space */
  }

  /* Monthly Table Responsive Card View */
  .whc-calculator-app .table-head {
    display: none;
    /* Hide header on mobile */
  }

  .whc-calculator-app .table-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-bottom: 1px solid #e2e8f0;
    padding: 16px;
    background: #fff;
  }

  .whc-calculator-app .table-row:nth-child(odd) {
    background: #f8fafc;
  }

  .whc-calculator-app .table-row>div {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
  }

  /* Add labels via pseudo-elements for mobile context */
  .whc-calculator-app .table-row>div:nth-child(1)::before {
    content: attr(data-label);
    font-weight: 600;
    color: #64748b;
  }

  .whc-calculator-app .table-row>div:nth-child(2)::before {
    content: attr(data-label);
    font-weight: 600;
    color: #64748b;
  }

  .whc-calculator-app .table-row>div:nth-child(3)::before {
    content: attr(data-label);
    font-weight: 600;
    color: #64748b;
  }

  /* Specific mobile labels for Annual table */
  .whc-calculator-app .annual-table .table-row>div:nth-child(1)::before {
    content: attr(data-label);
  }

  .whc-calculator-app .annual-table .table-row>div:nth-child(4)::before {
    content: attr(data-label);
    font-weight: 600;
    color: #64748b;
  }

  /* Adjust Result Grid for Mobile */
  .whc-calculator-app .result {
    grid-template-columns: 1fr;
    /* Stack result items */
    padding: 16px;
  }

  /* Fix Tab Text Overflow on Mobile */
  .whc-calculator-app .tab {
    font-size: 11px;
    padding: 10px 4px;
    text-align: center;
    word-break: break-word;
    /* Ensure it wraps if really needed, though font size should fix it */
    hyphens: auto;
    /* Allow tabs to have different widths so long words fit */
    flex: 1 1 auto;
    min-width: 0;
  }
}

@media (max-width: 400px) {
  .whc-calculator-app {
    padding: 6px;
  }

  .whc-calculator-app .app {
    padding: 12px;
  }

  .whc-calculator-app .tab {
    font-size: 11px;
    padding: 8px 4px;
    min-width: 0;
    flex: 1 1 auto;
    text-align: center;
  }

  .whc-calculator-app .tabs {
    flex-wrap: wrap;
    justify-content: center;
  }

  .whc-calculator-app button {
    font-size: 12px;
    padding: 10px 12px;
  }
}

@media (max-width: 380px) {
  .whc-calculator-app {
    padding: 8px;
  }

  .whc-calculator-app .app {
    padding: 12px;
  }

  .whc-calculator-app .stat-label {
    font-size: 11px;
  }

  .whc-calculator-app .stat-value {
    font-size: 16px; /* Further reduced from 20px for ultra-small screens */
  }

  .whc-calculator-app .stat-tile {
    padding: 10px; /* Reduced from 16px */
  }

  .whc-calculator-app .card-body {
    padding: 12px;
  }
}

.whc-calculator-app .estimate-note {
  font-size: 12px;
  margin-top: 6px;
  color: #666;
  font-style: italic;
}

.whc-calculator-app .chart-container {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Daily, Weekly, Monthly Quick Stats styles */
.whc-calculator-app .daily-quick-stats,
.whc-calculator-app .weekly-quick-stats,
.whc-calculator-app .monthly-quick-stats {
  margin-top: 24px;
}

.whc-calculator-app .stat-tile {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.3s ease;
}

.whc-calculator-app .stat-tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  border-color: #667eea;
}

.whc-calculator-app .stat-label {
  font-size: 13px;
  font-weight: 600;
  color: #64748b;
  line-height: 1.4;
}

.whc-calculator-app .stat-value {
  font-size: 28px;
  font-weight: 800;
  color: #1e293b;
  letter-spacing: -0.02em;
  word-wrap: break-word;
  overflow-wrap: break-word;
  line-height: 1.1;
}

/* Color accents for stats */
.whc-calculator-app .stat-tile:first-of-type .stat-value {
  color: #667eea;
  /* Indigo for regular hours */
}

.whc-calculator-app .stat-tile:last-of-type .stat-value {
  color: #b45309;
  /* Darker Amber for better contrast (WCAG AA) */
}

.whc-calculator-app .salary-result {
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
  border-color: #bbf7d0;
}

.whc-calculator-app .salary-result .result-value {
  color: #15803d;
}

@media (max-width: 640px) {
  .whc-calculator-app .daily-quick-stats {
    grid-template-columns: 1fr !important;
  }
}