/* Nordic Calculator Styles - Modern Edition */
:root {
  /* Modern Purple Nordic Color Palette */
  --color-primary: #8b5cf6;
  --color-primary-dark: #7c3aed;
  --color-primary-light: #a78bfa;
  --color-primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
  --color-secondary: #06b6d4;
  --color-secondary-dark: #0891b2;
  --color-accent: #f59e0b;
  --color-accent-gradient: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  
  /* Dark Mode Colors */
  --color-dark-bg: #121212;
  --color-dark-surface: #1e1e1e;
  --color-dark-surface-light: #2d2d2d;
  --color-dark-border: #404040;
  --color-dark-text: #e0e0e0;
  --color-dark-text-secondary: #b0b0b0;
  --color-dark-primary: #a78bfa;
  --color-dark-primary-light: #c4b5fd;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #eeeeee;
  --color-gray-300: #e0e0e0;
  --color-gray-400: #bdbdbd;
  --color-gray-500: #9e9e9e;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;
  
  /* Status Colors */
  --color-success: #4caf50;
  --color-warning: #ff9800;
  --color-error: #f44336;
  --color-info: #2196f3;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.375rem;
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 0.75rem;
  
  /* Modern Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-soft: 0 10px 40px rgba(139, 92, 246, 0.1);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background: 
    radial-gradient(ellipse 150vw 150vh at 20% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 70%),
    radial-gradient(ellipse 150vw 150vh at 80% 20%, rgba(6, 182, 212, 0.05) 0%, transparent 70%),
    linear-gradient(135deg, #fafafa 0%, #f0f2f5 100%);
  background-attachment: fixed;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

/* Focus Styles for Accessibility */
:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  z-index: 1000;
  transition: var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-soft);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.header__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.header__icon {
  font-size: var(--font-size-4xl);
  color: #8b5cf6;
  font-weight: var(--font-weight-bold);
  text-shadow: 0 2px 4px rgba(139, 92, 246, 0.3);
}

.header__controls {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--space-sm) var(--space-lg);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  position: relative;
}


/* Tabs Container */
.tabs-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.tabs-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  position: relative;
}

/* Copy Calculation Button */
.btn--copy-calculation {
  background: var(--color-primary-gradient);
  color: var(--color-white);
  border: none;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn--copy-calculation:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

.btn--copy-calculation:active {
  transform: translateY(0);
}

/* Toast Notification */
.toast {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-xs);
  background: var(--color-success);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  white-space: nowrap;
}

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

/* Calculator Styles */
.calculator {
  max-width: 400px;
  margin: 0 auto;
  background: var(--color-white);
  border-radius: 20px;
  padding: var(--space-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  outline: none;
  transition: box-shadow 0.2s ease;
}

.calculator:focus {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 0 0 3px rgba(139, 92, 246, 0.3);
}

.calculator__display {
  margin-bottom: var(--space-lg);
}

.calculator__input {
  width: 100%;
  padding: var(--space-md);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  text-align: right;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  background: var(--color-gray-50);
  font-family: var(--font-family-mono);
}

.calculator__buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.calculator__btn {
  padding: var(--space-md);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  border: none;
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calculator__btn--number {
  background: var(--color-white);
  color: var(--color-gray-800);
  border: 2px solid var(--color-gray-200);
}

.calculator__btn--number:hover {
  background: var(--color-gray-50);
  transform: translateY(-1px);
}

.calculator__btn--operator {
  background: var(--color-primary-gradient);
  color: var(--color-white);
}

.calculator__btn--operator:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.calculator__btn--clear {
  background: var(--color-error);
  color: var(--color-white);
}

.calculator__btn--clear:hover {
  background: #d32f2f;
  transform: translateY(-1px);
}

.calculator__btn--equals {
  background: var(--color-success);
  color: var(--color-white);
  grid-column: span 2;
}

.calculator__btn--equals:hover {
  background: #388e3c;
  transform: translateY(-1px);
}

.calculator__btn--zero {
  grid-column: span 2;
}

/* Tooltip Styles */
.tooltip {
  position: fixed;
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 10000;
  max-width: 300px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  transition: all 0.2s ease;
  pointer-events: none;
  line-height: 1.4;
}

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

/* KPI hover effect */
.kpi[data-tooltip] {
  cursor: help;
  transition: all 0.2s ease;
}

.kpi[data-tooltip]:hover {
  background: rgba(139, 92, 246, 0.05);
  border-radius: var(--border-radius-lg);
  transform: translateY(-2px);
}

/* Ad Placeholders */
.ad-placeholder {
  background: var(--color-gray-100);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin: var(--space-lg) 0;
  /* Prevent layout shift by setting min-height */
}

.ad-placeholder--top {
  min-height: 90px;
  max-width: var(--container-max-width);
  margin: var(--space-lg) auto;
}

.ad-placeholder--side {
  min-height: 250px;
  min-width: 160px;
  margin: 0;
}

.ad-placeholder--inline {
  min-height: 120px;
}

.ad-placeholder__content {
  text-align: center;
  padding: var(--space-md);
}

.ad-placeholder__label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Main Content */
.main {
  flex: 1;
  padding: var(--space-xl) 0;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-xl);
  border-bottom: 2px solid var(--color-gray-200);
}

.tab {
  background: none;
  border: none;
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-600);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-base);
  position: relative;
  border-radius: 12px 12px 0 0;
}

.tab:hover {
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.05);
  transform: translateY(-2px);
}

.tab--active {
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.1);
  border-bottom-color: var(--color-primary);
  box-shadow: 0 -2px 10px rgba(139, 92, 246, 0.1);
}

/* Content Layout */
.content {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-xl);
}

.content--centered {
  display: block !important;
  grid-template-columns: none !important;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.content__sidebar {
  display: flex;
  flex-direction: column;
}

.content__main {
  min-width: 0; /* Prevent grid blowout */
}

/* Panels */
.panel {
  display: none;
}

.panel--active {
  display: block;
}

/* Forms */
.calculator-form {
  background: var(--color-white);
  border-radius: 20px;
  padding: var(--space-2xl);
  box-shadow: var(--shadow-soft);
  margin-bottom: var(--space-xl);
  border: 1px solid rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
}

.calculator-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-primary-gradient);
  border-radius: 20px 20px 0 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
}

.form-group:hover .label {
  color: var(--color-primary);
}

.label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-700);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  letter-spacing: 0.025em;
}

.input, .select {
  padding: var(--space-lg);
  border: 2px solid var(--color-gray-200);
  border-radius: 12px;
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  background: var(--color-white);
  font-weight: var(--font-weight-medium);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Special styling for header controls */
.header__controls .select {
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-sm) var(--space-md);
  min-width: 140px;
}

.input:focus, .select:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow), 0 0 0 4px rgba(139, 92, 246, 0.1);
  transform: translateY(-1px);
}

.input:invalid {
  border-color: var(--color-error);
}

.help-text {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  line-height: var(--line-height-tight);
}

/* Advanced Options */
.advanced-options {
  margin-top: var(--space-xl);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.08);
}

.advanced-options__summary {
  padding: var(--space-lg);
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-base);
}

.advanced-options__summary:hover {
  background: rgba(139, 92, 246, 0.08);
  color: var(--color-primary-dark);
}

.advanced-options__summary::-webkit-details-marker {
  display: none;
}

.advanced-options__summary::after {
  content: '▼';
  transition: var(--transition-fast);
  font-size: var(--font-size-sm);
}

.advanced-options[open] .advanced-options__summary::after {
  transform: rotate(180deg);
}

.advanced-options__content {
  padding: 0 var(--space-lg) var(--space-lg);
  border-top: 1px solid rgba(139, 92, 246, 0.1);
  background: rgba(255, 255, 255, 0.95);
}

/* KPIs */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.kpi {
  background: var(--color-white);
  border-radius: 16px;
  padding: var(--space-xl);
  text-align: center;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.kpi::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary-gradient);
}

.kpi:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.kpi__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-family: var(--font-family-mono);
}

/* Chart Container */
.chart-container {
  background: var(--color-white);
  border-radius: 20px;
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.8);
  position: relative;
  height: 400px;
  overflow: hidden;
}

.chart-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-secondary);
}

.chart-container canvas {
  max-height: 100%;
}

/* Export Controls */
.export-controls {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border: 2px solid transparent;
  border-radius: 12px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 48px; /* Better touch target */
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.btn--primary {
  background: var(--color-primary-gradient);
  color: var(--color-white);
  border: none;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow), 0 8px 25px rgba(139, 92, 246, 0.3);
}

.btn--secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-gray-200);
}

.btn--secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Tables */
.table-container {
  background: var(--color-white);
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.8);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  position: relative;
}

.table-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent-gradient);
}

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

.table th {
  background: var(--color-gray-100);
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-700);
  border-bottom: 2px solid var(--color-gray-200);
}

.table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-gray-200);
  font-family: var(--font-family-mono);
}

.table tbody tr:hover {
  background: var(--color-gray-50);
}

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

/* Footer */
.footer {
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-xl) 0;
  margin-top: auto;
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

.footer__text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

/* Privacy Toggle */
.privacy-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
}

.privacy-toggle__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.privacy-toggle__slider {
  position: relative;
  display: block;
  width: 44px;
  height: 24px;
  background: var(--color-gray-600);
  border-radius: 12px;
  transition: var(--transition-base);
}

.privacy-toggle__slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--color-white);
  border-radius: 50%;
  transition: var(--transition-base);
}

.privacy-toggle__input:checked + .privacy-toggle__slider {
  background: var(--color-secondary);
}

.privacy-toggle__input:checked + .privacy-toggle__slider::before {
  transform: translateX(20px);
}

.privacy-toggle__label {
  color: var(--color-gray-300);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }
  
  .header {
    padding: var(--space-sm) 0;
  }
  
  .header .container {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
    padding-top: var(--space-sm);
    padding-bottom: var(--space-sm);
  }
  
  .header__title {
    font-size: var(--font-size-lg);
    margin: 0;
  }
  
  .header__icon {
    font-size: var(--font-size-xl);
  }
  
  .header__controls {
    width: 100%;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    flex-wrap: wrap;
  }
  
  .tabs-container {
    flex-direction: column;
    gap: var(--space-md);
    align-items: stretch;
  }
  
  .tabs-actions {
    justify-content: center;
  }
  
  .btn--copy-calculation {
    font-size: var(--font-size-xs);
    padding: var(--space-sm) var(--space-md);
  }
  
  .content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .content__sidebar {
    order: 2;
  }
  
  .ad-placeholder--side {
    min-height: 120px;
    min-width: auto;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .tabs {
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: var(--space-xs);
  }
  
  .tabs::-webkit-scrollbar {
    display: none;
  }
  
  .tab {
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
    white-space: nowrap;
    min-width: auto;
  }
  
  .input, .select, .textarea {
    font-size: 16px; /* Prevent zoom on iOS */
  }
  
  .kpis {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  
  .calculator {
    padding: var(--space-md);
  }
  
  .calculator__btn {
    min-height: 2.5rem;
    font-size: var(--font-size-base);
  }
  
  .export-controls {
    flex-direction: column;
  }
  
  .footer__content {
    flex-direction: column;
    text-align: center;
  }
  
  .chart-container {
    height: 300px;
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .kpis {
    grid-template-columns: 1fr;
  }
  
  .calculator-form {
    padding: var(--space-lg);
  }
  
  .chart-container {
    height: 250px;
    padding: var(--space-md);
  }
  
  .table {
    font-size: var(--font-size-xs);
  }
  
  .table th,
  .table td {
    padding: var(--space-sm);
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --color-gray-300: #666666;
    --color-gray-400: #555555;
    --color-gray-500: #444444;
  }
  
  .input, .select {
    border-width: 3px;
  }
  
  .btn {
    border-width: 3px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Dark Mode Support */
[data-theme="dark"] {
  --color-white: var(--color-dark-surface);
  --color-gray-50: var(--color-dark-bg);
  --color-gray-100: var(--color-dark-surface);
  --color-gray-200: var(--color-dark-border);
  --color-gray-300: var(--color-dark-border);
  --color-gray-400: #606060;
  --color-gray-500: #808080;
  --color-gray-600: var(--color-dark-text-secondary);
  --color-gray-700: var(--color-dark-text);
  --color-gray-800: var(--color-dark-text);
  --color-gray-900: var(--color-dark-text);
  --color-primary: var(--color-dark-primary);
  --color-primary-light: var(--color-dark-primary-light);
}


[data-theme="dark"] .header {
  background: rgba(30, 30, 30, 0.95);
  border-bottom: 1px solid rgba(64, 64, 64, 0.3);
}

[data-theme="dark"] .header__controls {
  background: rgba(45, 45, 45, 0.8);
  border: 1px solid rgba(64, 64, 64, 0.5);
}

[data-theme="dark"] .header__controls .select {
  background: rgba(64, 64, 64, 0.8);
  border: 1px solid rgba(128, 128, 128, 0.3);
  color: var(--color-dark-text);
}

[data-theme="dark"] .btn--copy-calculation {
  background: linear-gradient(135deg, var(--color-dark-primary) 0%, #0891b2 100%);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

[data-theme="dark"] .btn--copy-calculation:hover {
  background: linear-gradient(135deg, #0891b2 0%, var(--color-dark-primary) 100%);
  box-shadow: 0 8px 20px rgba(6, 182, 212, 0.4);
}

[data-theme="dark"] .toast {
  background: var(--color-success);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

/* Dark mode calculator styles */
[data-theme="dark"] .calculator {
  background: var(--color-dark-surface);
}

[data-theme="dark"] .calculator__input {
  background: var(--color-dark-surface-light);
  border-color: var(--color-dark-border);
  color: var(--color-dark-text);
}

[data-theme="dark"] .calculator__btn--number {
  background: var(--color-dark-surface-light);
  color: var(--color-dark-text);
  border-color: var(--color-dark-border);
}

[data-theme="dark"] .calculator__btn--number:hover {
  background: var(--color-dark-border);
}

[data-theme="dark"] .calculator:focus {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2), 0 0 0 3px rgba(167, 139, 250, 0.4);
}

[data-theme="dark"] .tooltip {
  background: var(--color-dark-surface-light);
  color: var(--color-dark-text);
  border: 1px solid var(--color-dark-border);
}

[data-theme="dark"] .kpi[data-tooltip]:hover {
  background: rgba(167, 139, 250, 0.1);
}

/* Contact Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: opacity 0.15s ease, visibility 0.15s ease;
}

.modal--open {
  opacity: 1;
  visibility: visible;
}

.modal__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
}

.modal__content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-gray-900);
  border-radius: 20px;
  padding: var(--space-xl);
  width: 90%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(167, 139, 250, 0.2);
}

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(167, 139, 250, 0.2);
}

.modal__header h2 {
  margin: 0;
  color: var(--color-white);
}

.modal__close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-gray-400);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.modal__close:hover {
  background: rgba(167, 139, 250, 0.1);
  color: var(--color-white);
}

.footer__contact-btn {
  background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
  border: none;
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  text-decoration: none;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius-full);
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.footer__contact-btn:hover {
  background: linear-gradient(135deg, #6366f1 0%, var(--color-primary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

.contact-form .form-group {
  margin-bottom: var(--space-lg);
}

.contact-form .input,
.contact-form .select,
.contact-form .textarea {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(167, 139, 250, 0.2);
  color: var(--color-white);
  border-radius: var(--border-radius-lg);
}

.contact-form .input::placeholder,
.contact-form .textarea::placeholder {
  color: var(--color-gray-400);
}

.contact-form .input:focus,
.contact-form .select:focus,
.contact-form .textarea:focus {
  border-color: var(--color-primary);
  background: rgba(167, 139, 250, 0.1);
  outline: none;
}

.textarea {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  resize: vertical;
  min-height: 100px;
  transition: all 0.2s ease;
}

.contact-form label {
  color: var(--color-gray-300);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
  display: block;
}

.error-message {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  display: block;
}

.contact-success {
  text-align: center;
  padding: var(--space-xl);
}

.success-icon {
  font-size: 3rem;
  color: var(--color-success);
  margin-bottom: var(--space-md);
}

.contact-success h3 {
  color: var(--color-success);
  margin: 0;
}

/* Dark mode modal styles */
[data-theme="dark"] .modal__content {
  background: var(--color-dark-surface);
  border-color: rgba(6, 182, 212, 0.2);
}

[data-theme="dark"] .modal__header {
  border-color: rgba(6, 182, 212, 0.2);
}

[data-theme="dark"] .modal__header h2 {
  color: var(--color-dark-text);
}

[data-theme="dark"] .modal__close {
  color: var(--color-dark-text-secondary);
}

[data-theme="dark"] .modal__close:hover {
  background: rgba(6, 182, 212, 0.1);
  color: var(--color-dark-text);
}

[data-theme="dark"] .contact-form .input,
[data-theme="dark"] .contact-form .select,
[data-theme="dark"] .contact-form .textarea {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--color-dark-text);
}

[data-theme="dark"] .contact-form .input:focus,
[data-theme="dark"] .contact-form .select:focus,
[data-theme="dark"] .contact-form .textarea:focus {
  border-color: var(--color-dark-primary);
  background: rgba(6, 182, 212, 0.15);
}

[data-theme="dark"] .footer__contact-btn {
  background: linear-gradient(135deg, var(--color-dark-primary) 0%, #0891b2 100%);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

[data-theme="dark"] .footer__contact-btn:hover {
  background: linear-gradient(135deg, #0891b2 0%, var(--color-dark-primary) 100%);
  box-shadow: 0 8px 20px rgba(6, 182, 212, 0.4);
}

[data-theme="dark"] body {
  background: 
    radial-gradient(ellipse 150vw 150vh at 20% 80%, rgba(167, 139, 250, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 150vw 150vh at 80% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 70%),
    linear-gradient(135deg, #121212 0%, #1a1a1a 100%);
  background-attachment: fixed;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  color: var(--color-dark-text);
}

[data-theme="dark"] .calculator-form,
[data-theme="dark"] .table-container,
[data-theme="dark"] .chart-container,
[data-theme="dark"] .kpi {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
}

[data-theme="dark"] .input,
[data-theme="dark"] .select {
  background: var(--color-dark-surface-light);
  border-color: var(--color-dark-border);
  color: var(--color-dark-text);
}

[data-theme="dark"] .input:focus,
[data-theme="dark"] .select:focus {
  border-color: var(--color-dark-primary);
  box-shadow: 0 0 0 3px rgba(77, 159, 255, 0.2);
}

[data-theme="dark"] .tab {
  color: var(--color-dark-text-secondary);
}

[data-theme="dark"] .tab:hover,
[data-theme="dark"] .tab--active {
  color: var(--color-dark-primary);
}

[data-theme="dark"] .table th {
  background: var(--color-dark-surface-light);
  color: var(--color-dark-text);
  border-color: var(--color-dark-border);
}

[data-theme="dark"] .table td {
  border-color: var(--color-dark-border);
}

[data-theme="dark"] .table tbody tr:hover {
  background: var(--color-dark-surface-light);
}

[data-theme="dark"] .ad-placeholder {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
  color: var(--color-dark-text-secondary);
}

[data-theme="dark"] .advanced-options {
  border-color: rgba(167, 139, 250, 0.2);
  background: rgba(45, 45, 45, 0.8);
}

[data-theme="dark"] .advanced-options__summary {
  background: rgba(64, 64, 64, 0.7);
}

[data-theme="dark"] .advanced-options__summary:hover {
  background: rgba(167, 139, 250, 0.1);
}

[data-theme="dark"] .advanced-options__content {
  border-color: rgba(167, 139, 250, 0.1);
  background: rgba(64, 64, 64, 0.8);
}

/* Dark Mode Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
}

.theme-toggle__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.theme-toggle__slider {
  position: relative;
  display: block;
  width: 48px;
  height: 26px;
  background: linear-gradient(135deg, #e5e7eb 0%, #d1d5db 100%);
  border-radius: 13px;
  transition: var(--transition-base);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.theme-toggle__slider::before {
  content: '☀️';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border-radius: 50%;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.theme-toggle__input:checked + .theme-toggle__slider {
  background: var(--color-primary-gradient);
  box-shadow: inset 0 2px 4px rgba(0, 102, 204, 0.3);
}

.theme-toggle__input:checked + .theme-toggle__slider::before {
  content: '🌙';
  transform: translateX(22px);
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  color: #f1f5f9;
}

.theme-toggle__label {
  color: var(--color-gray-700);
  font-weight: var(--font-weight-medium);
}

/* Fix KPI Value Clipping */
.kpi__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-family: var(--font-family-mono);
  word-break: break-all;
  overflow-wrap: break-word;
  line-height: var(--line-height-tight);
  min-height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  hyphens: none;
}

/* Responsive font size for KPIs */
@media (max-width: 768px) {
  .kpi__value {
    font-size: var(--font-size-xl);
    min-height: 2rem;
  }
}

@media (max-width: 480px) {
  .header {
    padding: var(--space-xs) 0;
  }
  
  .header__title {
    font-size: var(--font-size-base);
    margin: 0;
  }
  
  .header__icon {
    font-size: var(--font-size-lg);
  }
  
  .header .container {
    gap: var(--space-xs);
    padding-top: var(--space-xs);
    padding-bottom: var(--space-xs);
  }
  
  .header__controls {
    gap: var(--space-xs);
    padding: var(--space-xs);
  }
  
  .btn--copy-calculation {
    font-size: var(--font-size-xs);
    padding: var(--space-xs) var(--space-sm);
  }
  
  .tab {
    font-size: var(--font-size-xs);
    padding: var(--space-xs) var(--space-sm);
  }
  
  .kpi__value {
    font-size: var(--font-size-lg);
    min-height: 1.5rem;
  }
  
  .calculator__btn {
    min-height: 2rem;
    font-size: var(--font-size-sm);
  }
}

/* Educational Content Section */
.education-section {
  background: transparent;
  padding: var(--space-xl) 0 var(--space-3xl) 0;
  margin-top: 0;
}

/* Hide loan education section by default - shown only when loans tab is active */
#loan-education {
  display: none;
}

.education-content {
  max-width: 800px;
  margin: 0 auto;
}

.education-article {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(139, 92, 246, 0.1);
}

.education-article h2 {
  color: var(--color-primary);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.education-article h3 {
  color: var(--color-primary-dark);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
}

.education-text p {
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-base);
}

/* Tips Section */
.education-tips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.tip-card {
  background: rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  padding: var(--space-xl);
  border: 1px solid rgba(139, 92, 246, 0.1);
  transition: all var(--transition-base);
}

.tip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(139, 92, 246, 0.2);
}

.tip-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.tip-card p {
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

/* FAQ Section */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.faq-item {
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  border: 1px solid rgba(139, 92, 246, 0.1);
  overflow: hidden;
}

.faq-item summary {
  padding: var(--space-lg);
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  list-style: none;
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.5);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  float: right;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  transition: var(--transition-base);
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item summary:hover {
  background: rgba(139, 92, 246, 0.05);
}

.faq-item p {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* Dark Mode Support for Education Section */
[data-theme="dark"] .education-section {
  background: transparent;
}

[data-theme="dark"] .education-article {
  background: rgba(45, 45, 45, 0.9);
  border-color: rgba(167, 139, 250, 0.2);
}

[data-theme="dark"] .education-article h2,
[data-theme="dark"] .education-article h3 {
  color: var(--color-dark-primary);
}

[data-theme="dark"] .education-text p {
  color: var(--color-dark-text-secondary);
}

[data-theme="dark"] .tip-card {
  background: rgba(64, 64, 64, 0.8);
  border-color: rgba(167, 139, 250, 0.2);
}

[data-theme="dark"] .tip-card p {
  color: var(--color-dark-text-secondary);
}

[data-theme="dark"] .faq-item {
  background: rgba(64, 64, 64, 0.8);
  border-color: rgba(167, 139, 250, 0.2);
}

[data-theme="dark"] .faq-item summary {
  background: rgba(64, 64, 64, 0.6);
  color: var(--color-dark-primary);
}

[data-theme="dark"] .faq-item summary:hover {
  background: rgba(167, 139, 250, 0.1);
}

[data-theme="dark"] .faq-item p {
  color: var(--color-dark-text-secondary);
}

/* Responsive Design for Education Section */
@media (max-width: 768px) {
  .education-section {
    padding: var(--space-2xl) 0;
  }
  
  .education-article {
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
  }
  
  .education-tips {
    grid-template-columns: 1fr;
  }
  
  .tip-card {
    padding: var(--space-lg);
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .ad-placeholder,
  .export-controls,
  .theme-toggle {
    display: none;
  }
  
  .main {
    padding: 0;
  }
  
  .calculator-form,
  .table-container,
  .chart-container {
    box-shadow: none;
    border: 1px solid var(--color-gray-300);
  }
  
  .content {
    grid-template-columns: 1fr;
  }
  
  body {
    background: white;
    font-size: 12pt;
  }
}