/* ==========================================================================
   TIP CALCULATOR - CALCULATOR COMPONENT STYLES
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Calculator Wrapper & Main Card
   -------------------------------------------------------------------------- */
.calculator-section {
  padding-bottom: var(--space-12);
}

.calculator-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin: 0 auto;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.calculator-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  width: 100%;
  min-width: 0;
}

/* Left column: Inputs */
.calc-inputs-panel {
  padding: var(--space-8);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  min-width: 0;
  box-sizing: border-box;
  width: 100%;
}

/* Right column: Primary Results */
.calc-results-panel {
  background-color: var(--color-surface-subtle);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  box-sizing: border-box;
  width: 100%;
}

/* --------------------------------------------------------------------------
   2. Input Groups & Form Elements
   -------------------------------------------------------------------------- */
.calc-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
  width: 100%;
}

.calc-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-1);
  min-width: 0;
  width: 100%;
}

.calc-label {
  font-size: 0.95rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.calc-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Currency & Bill Input Group */
.bill-input-wrapper {
  position: relative;
  display: flex;
  align-items: stretch;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-width: 0;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.bill-input-wrapper:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
}

.bill-input-wrapper.has-error {
  border-color: var(--color-error);
}

.currency-select-container {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  background-color: var(--color-surface-subtle);
  border-right: 1px solid var(--color-border);
  border-top-left-radius: calc(var(--radius-md) - 2px);
  border-bottom-left-radius: calc(var(--radius-md) - 2px);
  flex-shrink: 0;
  max-width: 130px;
  min-width: 0;
}

.currency-select {
  font-weight: var(--font-weight-semibold);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  cursor: pointer;
  padding: var(--space-2) 0;
  outline: none;
  width: 100%;
  max-width: 100%;
}

.currency-symbol-display {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: var(--space-3);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.calc-input-bill {
  width: 100%;
  flex: 1 1 0%;
  min-width: 0;
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  padding: var(--space-3) var(--space-4);
  outline: none;
  background: transparent;
  box-sizing: border-box;
}

.calc-input-bill::placeholder {
  color: var(--color-border-hover);
}

.input-error-message {
  font-size: 0.8rem;
  color: var(--color-error);
  display: none;
  margin-top: 2px;
}

.input-error-message.visible {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* --------------------------------------------------------------------------
   3. Tip Percentage Buttons & Custom Input
   -------------------------------------------------------------------------- */
.tip-preset-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
}

.tip-btn {
  padding: var(--space-3) var(--space-2);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  background-color: var(--color-surface-subtle);
  color: var(--color-text-primary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-fast);
  min-width: 0;
  box-sizing: border-box;
}

.tip-btn:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.tip-btn.active {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
  box-shadow: 0 4px 10px rgba(255, 107, 107, 0.3);
}

/* Custom Tip Box */
.custom-tip-container {
  margin-top: var(--space-3);
  display: none;
  animation: slideDown 200ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
  width: 100%;
  min-width: 0;
}

.custom-tip-container.active {
  display: block;
}

.custom-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: border-color var(--transition-fast);
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  overflow: hidden;
}

.custom-input-wrapper:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
}

.custom-input {
  width: 100%;
  flex: 1 1 0%;
  min-width: 0;
  padding: var(--space-3) var(--space-4);
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  outline: none;
  box-sizing: border-box;
}

.custom-input-symbol {
  padding-right: var(--space-4);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   4. People Stepper
   -------------------------------------------------------------------------- */
.stepper-container {
  display: flex;
  align-items: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  overflow: hidden;
  transition: border-color var(--transition-fast);
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.stepper-container:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
}

.stepper-btn {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface-subtle);
  color: var(--color-text-primary);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  box-sizing: border-box;
}

.stepper-btn:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-accent);
}

.stepper-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background-color: var(--color-surface-subtle);
  color: var(--color-text-muted);
}

.stepper-input {
  flex: 1 1 0%;
  min-width: 0;
  width: 100%;
  text-align: center;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  padding: var(--space-2);
  outline: none;
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   5. Optional Tax Accordion Section
   -------------------------------------------------------------------------- */
.tax-expandable-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  overflow: hidden;
  transition: border-color var(--transition-fast);
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.tax-toggle-header {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-surface-subtle);
  cursor: pointer;
  user-select: none;
  min-width: 0;
  box-sizing: border-box;
}

.tax-toggle-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-weight-semibold);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  min-width: 0;
}

.tax-toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.tax-body {
  padding: var(--space-4);
  display: none;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
}

.tax-body.open {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.tax-options-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
}

.toggle-tip-on-tax {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  width: 100%;
}

/* Segmented Control for Yes / No */
.segmented-control {
  display: inline-flex;
  background-color: var(--color-surface-subtle);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.segmented-btn {
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: var(--font-weight-semibold);
  border-radius: calc(var(--radius-sm) - 2px);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.segmented-btn.active {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-xs);
}

/* --------------------------------------------------------------------------
   6. Rounding Controls
   -------------------------------------------------------------------------- */
.rounding-card {
  padding: var(--space-3) 0 0;
  width: 100%;
  min-width: 0;
}

.rounding-options-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
}

.rounding-btn {
  padding: var(--space-2) var(--space-1);
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  text-align: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  min-width: 0;
  box-sizing: border-box;
}

.rounding-btn:hover {
  background-color: var(--color-surface-subtle);
  color: var(--color-text-primary);
}

.rounding-btn.active {
  background-color: var(--color-text-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-text-primary);
}

.rounding-badge-container {
  margin-top: var(--space-2);
  display: none;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.rounding-badge-container.visible {
  display: block;
}

/* --------------------------------------------------------------------------
   7. Right Column - Calculation Results Display
   -------------------------------------------------------------------------- */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  width: 100%;
  min-width: 0;
}

.results-title {
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  min-width: 0;
}

.results-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Primary Total Card - Highlighted & Prominent */
.result-highlight-card {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-sm);
  text-align: center;
  position: relative;
  overflow: hidden;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.result-highlight-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--color-accent);
}

.result-highlight-label {
  font-size: 0.85rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.result-highlight-value {
  font-size: clamp(2rem, 5vw, 2.5rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1.15;
  letter-spacing: -0.02em;
  min-width: 0;
  word-break: break-word;
}

.result-highlight-sub {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* Secondary Output Cards Grid */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  width: 100%;
  min-width: 0;
}

.result-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  min-width: 0;
  box-sizing: border-box;
}

.result-item-label {
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  margin-bottom: 4px;
  min-width: 0;
}

.result-item-value {
  font-size: 1.35rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  min-width: 0;
  word-break: break-word;
}

.result-item-tax {
  grid-column: span 2;
  display: none;
}

.result-item-tax.visible {
  display: flex;
}

/* --------------------------------------------------------------------------
   8. Actions (Reset, Copy, Share, Preferences)
   -------------------------------------------------------------------------- */
.results-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: auto;
  width: 100%;
  min-width: 0;
}

.action-buttons-row {
  display: flex;
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
}

.action-buttons-row .btn {
  flex: 1;
}

.reset-prefs-link {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  background: none;
  cursor: pointer;
  padding: var(--space-1);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.reset-prefs-link:hover {
  color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
   9. Tip Breakdown & Comparison Tables Section
   -------------------------------------------------------------------------- */
.calc-secondary-container {
  margin-top: var(--space-10);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.breakdown-card,
.comparison-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.breakdown-header,
.comparison-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.breakdown-title,
.comparison-title {
  font-size: 1.15rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

/* Breakdown List */
.breakdown-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.breakdown-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-3);
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.95rem;
}

.breakdown-row.tax-row {
  display: none;
}

.breakdown-row.tax-row.visible {
  display: flex;
}

.breakdown-row.total-row {
  border-bottom: none;
  padding-top: var(--space-2);
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

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

.breakdown-value {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.breakdown-row.total-row .breakdown-value {
  color: var(--color-accent);
}

/* Comparison Table */
.comparison-table-wrapper {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-3) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.comparison-table td.text-right,
.comparison-table th.text-right {
  text-align: right;
}

.comparison-table tr.highlighted {
  background-color: var(--color-accent-subtle);
  font-weight: var(--font-weight-semibold);
}

.comparison-table tr.highlighted td {
  color: var(--color-accent);
}

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

/* --------------------------------------------------------------------------
   8. Quick Bill Preset Chips
   -------------------------------------------------------------------------- */
.quick-bill-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
  width: 100%;
  min-width: 0;
}

.quick-chip {
  flex: 1 1 auto;
  min-width: 44px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background-color: var(--color-surface-subtle);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  text-align: center;
  box-sizing: border-box;
}

.quick-chip:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.quick-chip.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text-inverse);
}

/* --------------------------------------------------------------------------
   9. Mobile Sticky Results Bottom Bar
   -------------------------------------------------------------------------- */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
  padding: var(--space-3) var(--space-4);
  z-index: 90;
  backdrop-filter: blur(8px);
}

.sticky-bar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-calculator);
  margin: 0 auto;
}

.sticky-bar-info {
  display: flex;
  flex-direction: column;
}

.sticky-bar-label {
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sticky-bar-value {
  font-size: 1.35rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1.1;
}

.sticky-bar-sub {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
}

.sticky-bar-actions {
  display: flex;
  gap: var(--space-2);
}

/* --------------------------------------------------------------------------
   10. Receipt Modal & Printable Receipt Card
   -------------------------------------------------------------------------- */
.receipt-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.receipt-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.receipt-modal-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  width: 100%;
  max-width: 440px;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-smooth);
}

.receipt-modal-backdrop.active .receipt-modal-card {
  transform: scale(1);
}

.receipt-paper {
  background-color: var(--color-surface);
  padding: var(--space-6);
  font-family: 'Courier New', Courier, monospace, var(--font-family);
  border-bottom: 2px dashed var(--color-border);
}

.receipt-header {
  text-align: center;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px dashed var(--color-border);
}

.receipt-title {
  font-size: 1.25rem;
  font-weight: bold;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

.receipt-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.receipt-line-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.95rem;
  margin-bottom: var(--space-4);
}

.receipt-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.receipt-divider {
  border-top: 1px dashed var(--color-border);
  margin: var(--space-2) 0;
}

.receipt-line.receipt-grand-total {
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--color-accent);
}

.receipt-footer-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-4);
}

.receipt-modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-surface-subtle);
}