/* ==========================================================================
   Airbnb ROI & Rental Yield Calculator - Pure CSS Design System
   Upload anywhere: Works in any modern browser without build tools
   ========================================================================== */

:root {
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-light: #e0f2fe;
  --accent: #f43f5e;
  --accent-light: #ffe4e6;
  --emerald: #10b981;
  --emerald-light: #d1fae5;
  --amber: #f59e0b;
  --amber-light: #fef3c7;
  --rose: #ef4444;
  --rose-light: #fee2e2;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --card-bg: #ffffff;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background-color: var(--slate-100);
  color: var(--slate-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 4rem;
}

/* Header & Navigation */
header.app-header {
  background: var(--slate-900);
  color: #ffffff;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--slate-800);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 2px 8px rgba(244, 63, 94, 0.4);
}

.brand-title h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.brand-title p {
  font-size: 0.75rem;
  color: var(--slate-400);
}

.header-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.select-wrapper {
  position: relative;
  display: inline-block;
}

.select-control {
  background: var(--slate-800);
  color: var(--slate-100);
  border: 1px solid var(--slate-700);
  padding: 0.45rem 2rem 0.45rem 0.75rem;
  font-size: 0.825rem;
  border-radius: var(--radius-sm);
  appearance: none;
  cursor: pointer;
  outline: none;
}
.select-control:focus {
  border-color: var(--primary);
}

.select-arrow {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.65rem;
  color: var(--slate-400);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  font-size: 0.825rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-secondary {
  background: var(--slate-800);
  color: var(--slate-200);
  border-color: var(--slate-700);
}
.btn-secondary:hover {
  background: var(--slate-700);
  color: #ffffff;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--primary-hover);
}

/* Main Container Layout */
.main-wrapper {
  max-width: 1440px;
  margin: 1.5rem auto;
  padding: 0 1rem;
}

/* Top KPI Scorecards Banner */
.kpi-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.875rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary);
}

.kpi-card.accent-rose::before { background: var(--rose); }
.kpi-card.accent-emerald::before { background: var(--emerald); }
.kpi-card.accent-amber::before { background: var(--amber); }

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

.kpi-title {
  font-size: 0.775rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--slate-500);
}

.kpi-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  background: var(--slate-100);
  color: var(--slate-600);
}
.kpi-badge.badge-green { background: var(--emerald-light); color: #065f46; }
.kpi-badge.badge-amber { background: var(--amber-light); color: #92400e; }
.kpi-badge.badge-red { background: var(--rose-light); color: #991b1b; }

.kpi-value {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.kpi-sub {
  font-size: 0.775rem;
  color: var(--slate-500);
  margin-top: 0.25rem;
}

/* Grid Layout: Form vs Results */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 1080px) {
  .content-grid {
    grid-template-columns: 460px 1fr;
    align-items: start;
  }
}

/* Cards & Sections */
.panel-card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.panel-card:last-child {
  margin-bottom: 0;
}

.panel-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--slate-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--slate-800);
}

.panel-title svg {
  color: var(--primary);
}

.panel-body {
  padding: 1.25rem;
}

/* Form Groups & Controls */
.form-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--slate-400);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.form-label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--slate-700);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.form-hint {
  font-size: 0.725rem;
  color: var(--slate-400);
}

.input-with-adornment {
  position: relative;
  display: flex;
  align-items: center;
}

.adornment-prefix {
  position: absolute;
  left: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-400);
  pointer-events: none;
}

.adornment-suffix {
  position: absolute;
  right: 0.75rem;
  font-size: 0.825rem;
  color: var(--slate-400);
  pointer-events: none;
}

.form-input {
  width: 100%;
  background: var(--slate-50);
  border: 1px solid var(--slate-300);
  color: var(--slate-800);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  outline: none;
  transition: all 0.15s ease;
}

.input-with-adornment .form-input.has-prefix {
  padding-left: 2rem;
}

.input-with-adornment .form-input.has-suffix {
  padding-right: 2.25rem;
}

.form-input:focus {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.12);
}

/* Range Sliders */
.range-slider {
  width: 100%;
  height: 6px;
  background: var(--slate-200);
  border-radius: 9999px;
  outline: none;
  margin-top: 0.5rem;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #ffffff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
  cursor: pointer;
  transition: transform 0.1s ease;
}
.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Stepper Quick-Adjust Buttons */
.quick-steppers {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.45rem;
}

.step-btn {
  background: var(--slate-100);
  border: 1px solid var(--slate-200);
  color: var(--slate-600);
  padding: 0.2rem 0.5rem;
  font-size: 0.725rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.1s ease;
}
.step-btn:hover {
  background: var(--slate-200);
  color: var(--slate-800);
}

/* Radio / Pill Switchers */
.segmented-control {
  display: flex;
  background: var(--slate-100);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--slate-200);
  margin-bottom: 1rem;
}

.segment-btn {
  flex: 1;
  text-align: center;
  padding: 0.45rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--slate-600);
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.segment-btn.active {
  background: #ffffff;
  color: var(--slate-900);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Toggle Switches */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
}

.switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-switch {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--slate-300);
  transition: .2s;
  border-radius: 24px;
}

.slider-switch:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .2s;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

input:checked + .slider-switch {
  background-color: var(--primary);
}

input:checked + .slider-switch:before {
  transform: translateX(18px);
}

/* Summary Pill Row */
.summary-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.85rem;
  margin-top: 0.75rem;
  font-size: 0.775rem;
  color: var(--slate-600);
}

.summary-pill-row span {
  font-weight: 700;
  color: var(--slate-900);
}

/* Diagnostics & Right Column Visualizations */
.tabs-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--slate-200);
  padding: 0 1.25rem;
  background: var(--slate-50);
  overflow-x: auto;
}

.tab-btn {
  padding: 0.85rem 0.75rem;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--slate-500);
  border: none;
  background: transparent;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Waterfall Allocation Bar */
.waterfall-bar-container {
  margin: 1rem 0;
}

.waterfall-bar {
  display: flex;
  height: 28px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
  background: var(--slate-200);
}

.bar-segment {
  height: 100%;
  transition: width 0.3s ease;
  position: relative;
}

.bar-segment:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 110%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--slate-900);
  color: white;
  padding: 0.25rem 0.5rem;
  font-size: 0.7rem;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 10;
}

.bar-net { background: #10b981; }
.bar-debt { background: #6366f1; }
.bar-mgt { background: #f59e0b; }
.bar-clean { background: #06b6d4; }
.bar-platform { background: #f43f5e; }
.bar-opex { background: #64748b; }

.legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--slate-600);
}

.legend-color {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* Ledger Table */
.ledger-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.825rem;
  margin-top: 1rem;
}

.ledger-table th, .ledger-table td {
  padding: 0.6rem 0.75rem;
  text-align: right;
  border-bottom: 1px solid var(--slate-100);
}

.ledger-table th:first-child, .ledger-table td:first-child {
  text-align: left;
}

.ledger-table th {
  font-weight: 700;
  color: var(--slate-400);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  background: var(--slate-50);
}

.ledger-table tr.total-row {
  font-weight: 800;
  background: var(--slate-50);
  border-top: 2px solid var(--slate-300);
  border-bottom: 2px solid var(--slate-300);
}

.ledger-table tr.net-cashflow-row {
  background: var(--emerald-light);
  color: #065f46;
  font-weight: 800;
  font-size: 0.9rem;
}

/* Sensitivity Heatmap Table */
.sensitivity-table-wrapper {
  overflow-x: auto;
  margin-top: 0.5rem;
}

.sensitivity-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 4px;
  font-size: 0.75rem;
}

.sensitivity-table th, .sensitivity-table td {
  padding: 0.55rem 0.4rem;
  text-align: center;
  border-radius: var(--radius-sm);
}

.sensitivity-table th {
  background: var(--slate-100);
  color: var(--slate-600);
  font-weight: 700;
}

.heatmap-cell {
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  font-weight: 700;
}
.heatmap-cell:hover {
  transform: scale(1.05);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  z-index: 2;
}

.heatmap-cell .roi-text {
  font-size: 0.8rem;
  display: block;
}

.heatmap-cell .cash-text {
  font-size: 0.65rem;
  opacity: 0.85;
  display: block;
}

.cell-high { background: #d1fae5; color: #065f46; }
.cell-mid-high { background: #ecfdf5; color: #047857; }
.cell-mid { background: #fef3c7; color: #92400e; }
.cell-low { background: #fee2e2; color: #b91c1c; }
.cell-negative { background: #fecdd3; color: #9f1239; }
.cell-current {
  outline: 2px solid var(--slate-900);
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.2);
}

/* SVG Chart */
.chart-container {
  width: 100%;
  height: 260px;
  position: relative;
  margin-top: 1rem;
}

.chart-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Comparison LTR Card */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.comparison-box {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.comparison-box.highlight {
  background: #f0fdf4;
  border-color: #86efac;
}

.comparison-metric {
  margin-bottom: 0.65rem;
}
.comparison-metric:last-child {
  margin-bottom: 0;
}

.comparison-label {
  font-size: 0.725rem;
  color: var(--slate-500);
}

.comparison-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--slate-900);
}

/* Toast Notification */
#toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--slate-900);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 1000;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

#toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Printable PDF View */
#print-report-area {
  display: none;
}

@media print {
  body {
    background: #ffffff;
    color: #000000;
    padding: 0;
  }
  header.app-header, .header-controls, .tabs-nav, .quick-steppers, .range-slider, #toast {
    display: none !important;
  }
  .content-grid {
    display: block;
  }
  .panel-card {
    border: 1px solid #ccc;
    box-shadow: none;
    page-break-inside: avoid;
    margin-bottom: 1.5rem;
  }
  #print-report-area {
    display: block !important;
  }
}