/* style.css */

/* --- Fonts & Base Setup --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Roboto:wght@300;400;500;700&display=swap');

:root {
  --font-title: 'Outfit', sans-serif;
  --font-body: 'Roboto', sans-serif;

  /* Material 3 Light Palette Tokens */
  --md-sys-color-primary: #3F51B5;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #e0e0ff;
  --md-sys-color-on-primary-container: #000066;
  --md-sys-color-secondary: #f59e0b;
  --md-sys-color-on-secondary: #000000;
  --md-sys-color-secondary-container: #fef3c7;
  --md-sys-color-on-secondary-container: #78350f;
  --md-sys-color-tertiary: #059669;
  --md-sys-color-on-tertiary: #ffffff;
  --md-sys-color-tertiary-container: #d1fae5;
  --md-sys-color-on-tertiary-container: #064e3b;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;
  --md-sys-color-background: #f8fafc;
  --md-sys-color-on-background: #0f172a;
  --md-sys-color-surface: #ffffff;
  --md-sys-color-on-surface: #0f172a;
  --md-sys-color-surface-variant: #f1f5f9;
  --md-sys-color-on-surface-variant: #475569;
  --md-sys-color-outline: #94a3b8;
  --md-sys-color-outline-variant: #cbd5e1;

  /* Elevation Shadows */
  --elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
  --elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
  --elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px 0px rgba(0, 0, 0, 0.30);

  /* Border Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Custom App Palette */
  --app-gradient-primary: linear-gradient(135deg, #3F51B5 0%, #1A237E 100%);
  --app-gradient-success: linear-gradient(135deg, #10B981 0%, #047857 100%);
  --app-gradient-accent: linear-gradient(135deg, #FBBF24 0%, #D97706 100%);
  --app-gradient-background: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Dark Theme Palette Overrides --- */
[data-theme="dark"] {
  --md-sys-color-primary: #9FA8DA;
  --md-sys-color-on-primary: #1A237E;
  --md-sys-color-primary-container: #283593;
  --md-sys-color-on-primary-container: #E8EAF6;
  --md-sys-color-secondary: #FCD34D;
  --md-sys-color-on-secondary: #451a03;
  --md-sys-color-secondary-container: #78350f;
  --md-sys-color-on-secondary-container: #fef3c7;
  --md-sys-color-tertiary: #34D399;
  --md-sys-color-on-tertiary: #064e3b;
  --md-sys-color-tertiary-container: #065f46;
  --md-sys-color-on-tertiary-container: #d1fae5;
  --md-sys-color-error: #ffb4ab;
  --md-sys-color-on-error: #690005;
  --md-sys-color-error-container: #93000a;
  --md-sys-color-on-error-container: #ffdad6;
  --md-sys-color-background: #0B0F17;
  --md-sys-color-on-background: #f8fafc;
  --md-sys-color-surface: #121824;
  --md-sys-color-on-surface: #f8fafc;
  --md-sys-color-surface-variant: #1e293b;
  --md-sys-color-on-surface-variant: #94a3b8;
  --md-sys-color-outline: #475569;
  --md-sys-color-outline-variant: #334155;

  --elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.3), 0px 1px 2px 0px rgba(0, 0, 0, 0.5);
  --elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.3), 0px 1px 2px 0px rgba(0, 0, 0, 0.5);
  --elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.3), 0px 1px 3px 0px rgba(0, 0, 0, 0.5);

  --app-gradient-primary: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  --app-gradient-background: linear-gradient(180deg, #0B0F17 0%, #111827 100%);
}

/* --- Base Layout --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--md-sys-color-background);
  background-image: var(--app-gradient-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

header {
  background: var(--md-sys-color-surface);
  border-bottom: 1px stroke var(--md-sys-color-outline-variant);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--elevation-1);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition-smooth);
}

.header-title-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-title-container img, 
.header-title-container svg {
  width: 40px;
  height: 40px;
}

h1 {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--md-sys-color-primary);
  letter-spacing: -0.5px;
}

.header-subtitle {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

main {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* --- Custom PWA Banner --- */
.pwa-banner {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--elevation-1);
  animation: fadeIn 0.5s ease-out;
}

.pwa-banner.hidden {
  display: none;
}

/* --- Tab Control --- */
.tab-container {
  align-self: center;
  background: var(--md-sys-color-surface-variant);
  padding: 4px;
  border-radius: var(--radius-full);
  display: inline-flex;
  gap: 4px;
  box-shadow: inset var(--elevation-1);
}

.tab-btn {
  background: transparent;
  border: none;
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--md-sys-color-on-surface-variant);
  transition: var(--transition-smooth);
}

.tab-btn.active {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--elevation-1);
}

/* --- Layout Grid --- */
.app-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 24px;
  align-items: start;
}

.app-grid.dual-input-layout {
  grid-template-columns: 1fr;
}

#input-container.dual-inputs {
  display: grid !important;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 1024px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
  #input-container.dual-inputs {
    grid-template-columns: 1fr;
  }
}

/* --- Form Cards & Card Containers --- */
.card {
  background: var(--md-sys-color-surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--elevation-1);
  border: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: var(--transition-smooth);
}

.card:hover {
  box-shadow: var(--elevation-2);
}

.card-title {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid var(--md-sys-color-primary-container);
  padding-bottom: 8px;
}

/* --- Inputs & Fields Styling --- */
.form-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

label {
  font-size: 13px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface-variant);
}

/* Customized HTML Input for neat look if M3 element load takes time */
input[type="number"], select {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 15px;
  border: 1.5px solid var(--md-sys-color-outline);
  border-radius: var(--radius-md);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  outline: none;
  transition: var(--transition-smooth);
}

input[type="number"]:focus, select:focus {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 3px var(--md-sys-color-primary-container);
}

.toggle-group {
  background: var(--md-sys-color-surface-variant);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-smooth);
}

.toggle-label-container {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toggle-desc {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
}

/* --- Custom Slider/Radio Switch for CIT --- */
.slider-container {
  background: var(--md-sys-color-surface-variant);
  padding: 16px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
}

.slider-val {
  color: var(--md-sys-color-primary);
  font-weight: 700;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--md-sys-color-outline-variant);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  cursor: pointer;
  box-shadow: var(--elevation-1);
  transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: var(--elevation-2);
}

/* --- Results Layout --- */
.results-pane {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Split view of the inputs (for different salary structures) */
.dual-input-view {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .dual-input-view {
    grid-template-columns: 1fr;
  }
}

.side-by-side-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .side-by-side-results {
    grid-template-columns: 1fr;
  }
}

.result-card {
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
}

.result-card.existing::before {
  background: var(--md-sys-color-outline);
}

.result-card.new::before {
  background: var(--md-sys-color-primary);
}

.hero-number-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--md-sys-color-surface-variant);
  padding: 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  margin: 16px 0;
}

.hero-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--md-sys-color-on-surface-variant);
}

.hero-number {
  font-family: var(--font-title);
  font-size: 36px;
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  line-height: 1.2;
}

.hero-number.cash {
  background: var(--app-gradient-success);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-number-sub {
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 4px;
}

/* --- Saving Indicator Badge --- */
.comparison-badge {
  grid-column: span 2;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 16px 24px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--elevation-1);
}

@media (max-width: 768px) {
  .comparison-badge {
    grid-column: span 1;
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
}

.badge-text {
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 600;
}

.badge-value {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 800;
  color: var(--md-sys-color-primary);
}

/* --- Detailed Breakdown Table --- */
.table-card {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

th, td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

th {
  font-family: var(--font-title);
  font-weight: 700;
  color: var(--md-sys-color-on-surface-variant);
}

tr:hover {
  background: var(--md-sys-color-surface-variant);
}

.row-group-title {
  font-family: var(--font-title);
  font-weight: 700;
  color: var(--md-sys-color-primary);
  background: var(--md-sys-color-surface-variant);
}

.net-highlight {
  font-weight: 700;
  font-size: 15px;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.highlight-positive {
  color: var(--md-sys-color-tertiary);
  font-weight: 700;
}

.highlight-negative {
  color: var(--md-sys-color-error);
  font-weight: 700;
}

/* --- Data Visualizations --- */
.chart-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-lg);
  min-height: 220px;
}

.chart-title {
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.svg-chart {
  width: 100%;
  max-width: 320px;
  height: 180px;
}

/* --- Footer --- */
footer {
  margin-top: 48px;
  padding: 24px;
  background: var(--md-sys-color-surface);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  text-align: center;
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

footer a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Navigation Header Styling --- */
.nav-container {
  display: flex;
  background: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-full);
  padding: 4px;
  gap: 4px;
}

.nav-item {
  background: transparent;
  border: none;
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-smooth);
}

.nav-item .material-icons {
  font-size: 18px;
}

.nav-item.active {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--elevation-1);
}

.nav-item:hover:not(.active) {
  background: var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
}

@media (max-width: 650px) {
  header {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  .nav-container {
    justify-content: center;
  }
}

/* --- Control Row & View Mode Toggles --- */
.control-row {
  position: sticky;
  top: var(--header-height, 72px);
  z-index: 90;
  background: var(--md-sys-color-background);
  background-image: var(--app-gradient-background);
  width: 100%;
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--elevation-1);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.view-mode-container {
  background: var(--md-sys-color-surface-variant);
  padding: 4px;
  border-radius: var(--radius-full);
  display: inline-flex;
  gap: 4px;
  box-shadow: inset var(--elevation-1);
}

.view-btn {
  background: transparent;
  border: none;
  font-family: var(--font-title);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--md-sys-color-on-surface-variant);
  transition: var(--transition-smooth);
}

.view-btn.active {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--elevation-1);
}

.view-btn:hover:not(.active) {
  background: var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
}

.diff-selector-card {
  align-self: center;
  margin-top: 4px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  background: var(--md-sys-color-surface);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  box-shadow: var(--elevation-1);
  border: 1px solid var(--md-sys-color-outline-variant);
}

/* --- Slab Breakdown Grid --- */
.slab-breakdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  transition: var(--transition-smooth);
}

/* --- Single Year Layout toggles --- */
.view-mode-82 .result-card.new {
  display: none !important;
}
.view-mode-82 .side-by-side-results {
  grid-template-columns: 1fr;
  max-width: 550px;
  margin: 0 auto;
}
.view-mode-82 .comparison-badge {
  display: none !important;
}
.view-mode-82 .slab-col-83 {
  display: none !important;
}
.view-mode-82 .slab-breakdown-grid {
  grid-template-columns: 1fr;
}
.view-mode-82 table tr th:nth-child(3),
.view-mode-82 table tr td:nth-child(3),
.view-mode-82 table tr th:nth-child(4),
.view-mode-82 table tr td:nth-child(4) {
  display: none !important;
}

.view-mode-83 .result-card.existing {
  display: none !important;
}
.view-mode-83 .side-by-side-results {
  grid-template-columns: 1fr;
  max-width: 550px;
  margin: 0 auto;
}
.view-mode-83 .comparison-badge {
  display: none !important;
}
.view-mode-83 .slab-col-82 {
  display: none !important;
}
.view-mode-83 .slab-breakdown-grid {
  grid-template-columns: 1fr;
}
.view-mode-83 table tr th:nth-child(2),
.view-mode-83 table tr td:nth-child(2),
.view-mode-83 table tr th:nth-child(4),
.view-mode-83 table tr td:nth-child(4) {
  display: none !important;
}

/* --- Features Page Styling --- */
.features-hero {
  text-align: center;
  padding: 32px 24px;
  background: var(--app-gradient-primary);
  border-radius: var(--radius-xl);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  box-shadow: var(--elevation-2);
}

.features-hero h2 {
  font-family: var(--font-title);
  font-size: 26px;
  font-weight: 800;
}

.features-hero p {
  max-width: 640px;
  font-size: 14px;
  opacity: 0.9;
  line-height: 1.6;
}

.features-hero .hero-icon {
  font-size: 48px;
  color: var(--md-sys-color-secondary);
  animation: pulse 2s infinite ease-in-out;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.feature-card {
  gap: 12px !important;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--elevation-3);
}

.feature-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--md-sys-color-surface-variant);
  padding-bottom: 8px;
}

.feature-card-header h3 {
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 700;
}

.feature-card p {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

.feature-card ul {
  list-style: none;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.feature-card ul li {
  position: relative;
  padding-left: 24px;
  line-height: 1.4;
}

.feature-card ul li::before {
  content: "check_circle";
  font-family: "Material Icons";
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 15px;
  color: var(--md-sys-color-tertiary);
}

.features-table-card table {
  margin-top: 16px;
}

.features-table-card table th {
  background: var(--md-sys-color-surface-variant);
}

.features-table-card table td {
  padding: 12px 16px;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.85; }
  100% { transform: scale(1); opacity: 1; }
}

/* --- Layout Switching Visibility --- */
.hidden {
  display: none !important;
}

/* --- Card Header Copy Buttons --- */
.card-header-btn {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: none;
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-family: var(--font-title);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-smooth);
}

.card-header-btn:hover {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--elevation-1);
}

.card-header-btn .material-icons {
  font-size: 14px;
}

/* --- Reset Button Styling --- */
#btn-reset:hover {
  background: var(--md-sys-color-error) !important;
  color: var(--md-sys-color-on-error) !important;
  box-shadow: var(--elevation-1);
}

/* --- Responsible AI Page Styling --- */
.ai-hero {
  text-align: center;
  padding: 32px 24px;
  background: linear-gradient(135deg, #6366F1 0%, #4338CA 100%);
  border-radius: var(--radius-xl);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  box-shadow: var(--elevation-2);
}

.ai-hero h2 {
  font-family: var(--font-title);
  font-size: 26px;
  font-weight: 800;
}

.ai-hero p {
  max-width: 640px;
  font-size: 14px;
  opacity: 0.9;
  line-height: 1.6;
}

.ai-hero .hero-icon {
  font-size: 48px;
  color: #FCD34D;
  animation: pulse 2s infinite ease-in-out;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.ai-card {
  gap: 12px !important;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--elevation-3);
}

.ai-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--md-sys-color-surface-variant);
  padding-bottom: 8px;
}

.ai-card-header h3 {
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 700;
}

.ai-card-content p {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

.ai-card-content ul {
  list-style: none;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.ai-card-content ul li {
  position: relative;
  padding-left: 24px;
  line-height: 1.4;
  color: var(--md-sys-color-on-surface-variant);
}

.ai-card-content ul li::before {
  content: "offline_pin";
  font-family: "Material Icons";
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 16px;
  color: var(--md-sys-color-primary);
}

.ai-callout-card {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 16px;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: var(--md-sys-color-primary);
  padding: 16px 24px;
}

.ai-callout-card .material-icons {
  font-size: 28px;
  color: var(--md-sys-color-primary);
}

/* --- Mode Y Active Theme Color Scheme --- */
body.mode-y-active {
  --md-sys-color-primary: #00796B;
  --md-sys-color-primary-container: #B2DFDB;
  --md-sys-color-on-primary-container: #004D40;
  --app-gradient-primary: linear-gradient(135deg, #00796B 0%, #004D40 100%);
  --app-gradient-background: linear-gradient(180deg, #E0F2F1 0%, #B2DFDB 100%);
  background-image: var(--app-gradient-background);
}

[data-theme="dark"] body.mode-y-active {
  --md-sys-color-primary: #80CBC4;
  --md-sys-color-primary-container: #004D40;
  --md-sys-color-on-primary-container: #E0F2F1;
  --app-gradient-primary: linear-gradient(135deg, #004D40 0%, #002B2B 100%);
  --app-gradient-background: linear-gradient(180deg, #071717 0%, #020C0C 100%);
  background-image: var(--app-gradient-background);
}

/* --- Input & Configuration Tooltips --- */
.has-tooltip {
  position: relative;
}

.tooltip-text {
  visibility: hidden;
  width: 250px;
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  text-align: left;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 11px;
  line-height: 1.5;
  box-shadow: var(--elevation-2);
  position: absolute;
  z-index: 2000; /* Float above other elements, including sticky headers */
  bottom: 110%;
  left: 50%;
  transform: translateX(-50%) translateY(6px) scale(0.95);
  opacity: 0;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.2s;
  pointer-events: none;
}

/* Tooltip arrow */
.tooltip-text::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -6px;
  border-width: 6px;
  border-style: solid;
  border-color: var(--md-sys-color-surface-variant) transparent transparent transparent;
}

/* Show tooltip on hover of the wrapper group */
.has-tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

/* Make tooltips responsive on smaller screens */
@media (max-width: 480px) {
  .tooltip-text {
    width: 200px;
    font-size: 10px;
    padding: 8px 12px;
  }
}

/* --- Mobile Responsiveness Enhancements --- */
@media (max-width: 600px) {
  /* Prevent horizontal scrollbars on body */
  html, body {
    max-width: 100%;
    overflow-x: hidden;
  }

  main {
    padding: 12px;
    gap: 16px;
  }

  .card {
    padding: 16px;
    gap: 16px;
    border-radius: var(--radius-lg);
  }

  /* Optimize card headers so copy buttons stack vertically if they don't fit */
  .card-title {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 8px !important;
  }

  .card-header-btn {
    width: 100%;
    justify-content: center;
  }

  /* Shrink page header padding and stack nicely */
  header {
    padding: 12px 16px !important;
  }

  /* Shrink nav bar to fit screens without horizontal scroll */
  .nav-container {
    width: 100%;
    border-radius: var(--radius-md);
  }

  .nav-item {
    flex: 1;
    justify-content: center;
    padding: 8px 4px;
    font-size: 10px;
    border-radius: var(--radius-md);
  }

  .nav-item .material-icons {
    font-size: 16px;
  }

  /* Make sticky control row shorter and stack controls neatly */
  .control-row {
    padding: 8px !important;
    gap: 8px !important;
    margin-bottom: 16px !important;
  }

  .tab-container, .view-mode-container {
    flex-wrap: wrap;
    justify-content: center;
    border-radius: var(--radius-md) !important;
    width: 100%;
  }

  .tab-btn, .view-btn {
    flex: 1;
    text-align: center;
    padding: 6px 8px;
    font-size: 11px;
    border-radius: var(--radius-md) !important;
  }

  /* Inputs padding adjustment */
  input[type="number"], select {
    padding: 10px 12px;
    font-size: 14px;
  }

  .toggle-group {
    padding: 10px 12px;
  }

  .slider-container {
    padding: 12px;
  }

  /* Tooltips sizing on mobile */
  .tooltip-text {
    width: 220px;
    font-size: 10px;
    padding: 8px 12px;
  }
}

@media (max-width: 380px) {
  /* On extremely narrow screens, hide labels/texts in navigation to save space */
  .nav-item span:last-child {
    display: none;
  }
}

/* --- Progressive Slab Visualizer Chart Bar --- */
.slab-bar-container {
  display: flex;
  height: 16px;
  width: 100%;
  background-color: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-xs);
  overflow: hidden;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
  position: relative;
}

.slab-segment {
  height: 100%;
  transition: width 0.5s ease-in-out;
  position: relative;
  cursor: help;
}

/* Colors for progressive tax brackets in Nepal */
.slab-seg-0 { background-color: #A7F3D0; }  /* 0% (SST Waived) - light green */
.slab-seg-1 { background-color: #34D399; }  /* 1% SST - green */
.slab-seg-10 { background-color: #FBBF24; } /* 10% - orange */
.slab-seg-20 { background-color: #F87171; } /* 20% - light red */
.slab-seg-27 { background-color: #EF4444; } /* 27% - red */
.slab-seg-29 { background-color: #B91C1C; } /* 29% - dark red */
.slab-seg-30 { background-color: #EF4444; } /* 30% for 82/83 single/married */
.slab-seg-36 { background-color: #DC2626; } /* 36% for 82/83 */
.slab-seg-39 { background-color: #991B1B; } /* 39% for 82/83 */

.slab-bar-legend {
  display: flex;
  flex-wrap: wrap;
  column-gap: 12px;
  row-gap: 4px;
  margin-top: 6px;
  font-size: 10px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface-variant);
}

.legend-color {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

/* --- Smart Tax Optimization Cards --- */
.opt-tip-item {
  background: var(--md-sys-color-surface-variant);
  border-left: 4px solid var(--md-sys-color-primary);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  transition: var(--transition-smooth);
}

.opt-tip-item:hover {
  transform: translateX(4px);
  background: var(--md-sys-color-outline-variant);
}

.opt-tip-icon {
  font-size: 18px;
  color: var(--md-sys-color-primary);
  margin-top: 1px;
}

.opt-tip-text {
  flex: 1;
  line-height: 1.4;
}

.opt-tip-title {
  font-weight: 700;
  font-size: 13px;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 2px;
}

.opt-tip-desc {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
}

/* Portal Link Items Hover Effects */
.portal-link-item {
  transition: transform 0.2s, filter 0.2s;
}

.portal-link-item:hover .card {
  transform: translateY(-2px);
  box-shadow: var(--md-sys-elevation-2);
  border-color: var(--md-sys-color-primary) !important;
}

/* --- Print Stylesheet --- */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12px !important;
  }

  header, 
  .control-row, 
  #diff-mode-container, 
  #input-container, 
  #nego-input-container, 
  .chart-container, 
  #optimization-tips-card, 
  #pwa-banner, 
  footer,
  #btn-export-pdf,
  .card-header-btn {
    display: none !important;
  }

  main {
    padding: 0 !important;
    margin: 0 !important;
    max-width: 100% !important;
  }

  .app-grid {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
  }

  .results-pane {
    width: 100% !important;
  }

  .side-by-side-results {
    grid-template-columns: 1fr 1fr !important;
    gap: 16px !important;
    page-break-inside: avoid;
  }

  .card {
    background: #ffffff !important;
    border: 1px solid #cccccc !important;
    box-shadow: none !important;
    padding: 12px !important;
    margin-bottom: 16px !important;
  }

  .table-card {
    border: none !important;
    width: 100% !important;
  }

  table {
    font-size: 11px !important;
  }

  th, td {
    padding: 6px 8px !important;
    border-bottom: 1px solid #dddddd !important;
  }

  .highlight-positive {
    color: #047857 !important;
    font-weight: bold !important;
  }

  .highlight-negative {
    color: #b91c1c !important;
    font-weight: bold !important;
  }

  .net-highlight {
    background: #f3f4f6 !important;
    color: #000000 !important;
  }
}