/* ==========================================================================
   UK FINANCIAL HUB - DARK MODERN THEME
   Complete CSS Overhaul - Premium Finance App Design
   Version: 2.0
   Last Updated: February 2026
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ==========================================================================
   CSS VARIABLES - Dark Theme Color System
   ========================================================================== */

:root {
  /* Background Colors - Layered Dark System */
  --bg-primary: #0A0A0F;
  --bg-secondary: #12121A;
  --bg-tertiary: #1A1A25;
  --bg-card: #16161F;
  --bg-elevated: #1E1E2A;
  --bg-input: #1A1A25;
  
  /* Accent Gradients */
  --bg-accent: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-accent-hover: linear-gradient(135deg, #7c8ff5 0%, #8b5cb8 100%);
  --bg-success: linear-gradient(135deg, #10B981 0%, #059669 100%);
  --bg-warning: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  --bg-error: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  
  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #B4B4BC;
  --text-muted: #9CA3AF;
  --text-inverse: #0A0A0F;
  
  /* Brand Colors */
  --primary: #818CF8;
  --primary-dark: #6366F1;
  --primary-light: #A5B4FC;
  --primary-rgb: 129, 140, 248;
  
  /* Semantic Colors */
  --success: #34D399;
  --success-light: #6EE7B7;
  --warning: #FBBF24;
  --warning-light: #FCD34D;
  --error: #F87171;
  --error-light: #FCA5A5;
  --info: #60A5FA;
  
  /* Border Colors */
  --border: #27272A;
  --border-light: #3F3F46;
  --border-focus: rgba(129, 140, 248, 0.5);
  
  /* Shadow System */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 60px rgba(129, 140, 248, 0.15);
  --shadow-glow-success: 0 0 40px rgba(52, 211, 153, 0.2);
  --shadow-glow-primary: 0 4px 20px rgba(99, 102, 241, 0.4);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  
  /* Spacing & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Legacy Variable Aliases (for blog.css, mortgage-enhanced.css compatibility) */
  --bg-white: #16161F;
  --bg-light: #1A1A25;
  --border-color: #27272A;
  --primary-color: #818CF8;
  --secondary-color: #6366F1;
  --error-color: #F87171;
  --success-color: #34D399;
  --warning-color: #FBBF24;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: all 0.2s ease;

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 1000;
  --z-tooltip: 1100;
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Subtle ambient background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(ellipse at 20% 20%, rgba(129, 140, 248, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(118, 75, 162, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

strong, b {
  font-weight: 600;
  color: var(--text-primary);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */

.header {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.9;
  color: var(--text-primary);
}

.logo-icon,
.logo::before {
  content: '💷';
  width: 40px;
  height: 40px;
  background: var(--bg-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-glow-primary);
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  align-items: center;
}

.nav-menu > li {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.625rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-link.active {
  color: var(--primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: var(--bg-tertiary);
}

/* ==========================================================================
   DROPDOWN NAVIGATION
   ========================================================================== */

.dropdown {
  position: relative;
}

.dropdown-toggle {
  cursor: pointer;
}

.dropdown-toggle .arrow {
  font-size: 0.7rem;
  transition: transform var(--transition-base);
  display: inline-block;
}

.dropdown:hover .dropdown-toggle .arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  min-width: 240px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
  list-style: none;
  padding: 0.5rem;
  overflow: hidden;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-menu li a:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* ==========================================================================
   MAIN CONTENT CONTAINER
   ========================================================================== */

.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==========================================================================
   BREADCRUMB
   ========================================================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

/* ==========================================================================
   CALCULATOR HEADER
   ========================================================================== */

.calculator-header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
}

.calculator-header h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #FFFFFF 0%, #A1A1AA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.calculator-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   CALCULATOR LAYOUT - Two Column
   ========================================================================== */

.calculator-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* ==========================================================================
   CALCULATOR CARDS
   ========================================================================== */

.calculator-inputs,
.calculator-results {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

.calculator-inputs {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
}

.calculator-results {
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
  box-shadow: var(--shadow-glow);
}

.calculator-inputs h3,
.calculator-results h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.calculator-inputs h3::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--bg-accent);
  border-radius: 2px;
}

.calculator-results h3::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--bg-success);
  border-radius: 2px;
}

/* ==========================================================================
   FORM ELEMENTS
   ========================================================================== */

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  display: block;
}

.tooltip {
  color: var(--text-muted);
  cursor: help;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.tooltip:hover {
  color: var(--primary);
}

/* Input Group */
.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 1rem;
  z-index: 1;
  pointer-events: none;
}

.input-suffix {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-weight: 500;
  pointer-events: none;
}

/* Text Inputs & Number Inputs */
input[type="text"],
input[type="email"],
input[type="number"],
input[type="tel"],
input[type="password"],
textarea {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-input);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  appearance: none;
}

input.has-prefix,
input[type="number"] {
  padding-left: 2.5rem;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="password"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.15);
}

/* Select Dropdown */
select {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-input);
  color: var(--text-primary);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='%2371717A'%3E%3Cpath d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 3rem;
  transition: all var(--transition-fast);
}

select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.15);
}

select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* Range Slider */
.slider-container {
  margin-top: 0.75rem;
}

input[type="range"] {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 22px;
  height: 22px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.5);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 30px rgba(var(--primary-rgb), 0.7);
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.5);
}

/* Checkbox */
input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--primary);
  cursor: pointer;
}

/* Helper Text */
.text-muted {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ==========================================================================
   RESULT CARDS
   ========================================================================== */

.result-card {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.result-card:hover {
  border-color: var(--border-light);
}

/* Highlighted Result Card */
.result-card.highlight {
  background: var(--bg-accent);
  border: none;
  box-shadow: var(--shadow-glow), 0 8px 32px rgba(99, 102, 241, 0.3);
  position: relative;
  overflow: hidden;
}

.result-card.highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
  animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.result-card.highlight .result-label,
.result-card.highlight .result-label-mini {
  color: rgba(255, 255, 255, 0.8);
}

.result-card.highlight .result-value,
.result-card.highlight .result-value-mini {
  color: white;
}

/* Result Labels & Values */
.result-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.result-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
  font-family: var(--font-sans);
}

.result-subtext {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  position: relative;
  z-index: 1;
}

.result-card.highlight .result-subtext {
  color: rgba(255, 255, 255, 0.8);
}

/* Result Grid - Mini Cards */
.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.result-card-mini {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.result-card-mini:hover {
  border-color: var(--border-light);
  background: var(--bg-elevated);
}

.result-label-mini {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.result-value-mini {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--bg-accent);
  color: white;
  box-shadow: var(--shadow-glow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.1);
}

.btn-success {
  background: var(--bg-success);
  color: white;
  box-shadow: var(--shadow-glow-success);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.5);
}

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1.25rem 2rem;
  font-size: 1rem;
}

/* ==========================================================================
   CHARTS
   ========================================================================== */

.chart-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding: 0.25rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.chart-tab {
  flex: 1;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.chart-tab:hover {
  color: var(--text-secondary);
}

.chart-tab.active {
  background: var(--bg-accent);
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.chart-container {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  min-height: 280px;
  border: 1px solid var(--border);
}

.chart-container.hidden {
  display: none;
}

/* ==========================================================================
   SAVINGS HIGHLIGHT
   ========================================================================== */

.savings-highlight {
  background: var(--bg-success);
  color: white;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-glow-success);
}

.savings-highlight h4 {
  color: white;
  margin-bottom: 1rem;
}

.savings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.saving-item {
  text-align: center;
}

.saving-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.9;
  margin-bottom: 0.25rem;
}

.saving-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.saving-value.green {
  color: #d1fae5;
}

/* ==========================================================================
   OVERPAYMENT SECTION
   ========================================================================== */

.overpayment-section {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.5rem;
  border: 1px solid var(--border);
}

.overpayment-section h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================================================
   INFO SECTIONS
   ========================================================================== */

.info-section {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  margin-top: 3rem;
  border: 1px solid var(--border);
}

.info-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.info-section p {
  color: var(--text-secondary);
}

.info-section ul {
  list-style: none;
  margin-top: 1.5rem;
}

.info-section li {
  padding: 0.875rem 0;
  padding-left: 2rem;
  position: relative;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.info-section li:last-child {
  border-bottom: none;
}

.info-section li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
  font-size: 1.1rem;
}

.info-section li strong {
  color: var(--text-primary);
}

/* ==========================================================================
   DISCLAIMER
   ========================================================================== */

.disclaimer {
  background: rgba(251, 191, 36, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 2rem;
  border-left: 4px solid var(--warning);
}

.disclaimer p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

.disclaimer strong {
  color: var(--warning);
}

/* ==========================================================================
   CALCULATOR SPECIFIC - HOMEPAGE CARDS
   ========================================================================== */

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.calculator-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  border: 1px solid var(--border);
  transition: all var(--transition-base);
  text-decoration: none;
  display: block;
}

.calculator-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.calculator-card h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.calculator-card p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.calculator-card .card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

/* ==========================================================================
   TABLES
   ========================================================================== */

.schedule-table-container {
  overflow-x: auto;
  margin-top: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.schedule-table,
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.schedule-table thead,
table thead {
  background: var(--bg-tertiary);
}

.schedule-table th,
table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  border-bottom: 2px solid var(--border);
}

.schedule-table td,
table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.schedule-table tbody tr:hover,
table tbody tr:hover {
  background: var(--bg-tertiary);
}

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

.schedule-table .highlight-row {
  background: rgba(var(--primary-rgb), 0.1) !important;
}

/* ==========================================================================
   JARGON BUSTER
   ========================================================================== */

.jargon-buster-section {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin: 2rem 0;
  border: 1px solid var(--border);
}

.jargon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.jargon-card {
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.jargon-card:hover {
  border-color: var(--primary);
}

.jargon-card.active {
  border-color: var(--primary);
  background: var(--bg-elevated);
}

.jargon-term {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  user-select: none;
}

.jargon-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.jargon-title {
  flex: 1;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.938rem;
}

.jargon-toggle {
  color: var(--primary);
  font-size: 0.875rem;
  transition: transform var(--transition-fast);
}

.jargon-card.active .jargon-toggle {
  transform: rotate(180deg);
}

.jargon-definition {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: 0;
}

.jargon-card.active .jargon-definition {
  max-height: 300px;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ==========================================================================
   MODAL
   ========================================================================== */

.modal {
  display: none;
  position: fixed;
  z-index: var(--z-modal);
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  animation: slideUp 0.3s;
  position: relative;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-close {
  position: absolute;
  right: 1.5rem;
  top: 1.5rem;
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 4rem 2rem 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.footer-section h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section p {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  max-width: 1400px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1024px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Mobile Navigation */
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    display: none;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    z-index: var(--z-dropdown);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu > li {
    width: 100%;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-menu > li:last-child {
    border-bottom: none;
  }
  
  .nav-link {
    width: 100%;
    padding: 1rem;
    justify-content: space-between;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  /* Mobile Dropdown */
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-left: 3px solid var(--primary);
    border-radius: 0;
    margin-left: 1rem;
    padding: 0.5rem 0;
    background: var(--bg-tertiary);
    display: none;
  }
  
  .dropdown.active .dropdown-menu {
    display: block;
  }
  
  /* Typography */
  .calculator-header h1 {
    font-size: 2rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  /* Grids */
  .result-grid {
    grid-template-columns: 1fr;
  }
  
  .savings-grid {
    grid-template-columns: 1fr;
  }
  
  .jargon-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  /* Spacing */
  .main-content {
    padding: 1rem;
  }
  
  .calculator-inputs,
  .calculator-results {
    padding: 1.5rem;
  }
  
  /* Charts */
  .chart-tabs {
    flex-wrap: wrap;
  }
  
  .chart-tab {
    flex: 1 1 45%;
    min-width: 120px;
  }
}

@media (max-width: 480px) {
  .result-value {
    font-size: 2rem;
  }
  
  .result-value-mini {
    font-size: 1.25rem;
  }
  
  .btn {
    padding: 0.875rem 1.25rem;
  }
  
  .modal-content {
    padding: 1.5rem;
    width: 95%;
  }
}



/* ==========================================================================
   FAQ SECTION
   ========================================================================== */

.faq-section {
  margin: 2rem 0;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.25rem;
  text-align: left;
  background: var(--bg-tertiary);
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}

.faq-question:hover {
  background: var(--bg-elevated);
}

.faq-question::after {
  content: '▼';
  font-size: 0.8rem;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question {
  border-bottom: 1px solid var(--border);
}

.faq-item.active .faq-question::after {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--text-secondary);
}

.faq-item.active .faq-answer {
  max-height: 2000px;
  padding: 1.25rem;
}

.faq-answer p {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer strong {
  color: var(--text-primary);
}

.faq-answer ul,
.faq-answer li {
  color: var(--text-secondary);
}

.faq-icon {
  color: var(--primary);
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

/* Hide ::after arrow when .faq-icon span exists */
.faq-question:has(.faq-icon)::after {
  display: none;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
  body {
    background: white;
    color: black;
  }
  
  body::before {
    display: none;
  }
  
  .header,
  .footer,
  .mobile-menu-toggle,
  .btn,
  .chart-tabs,
  .modal {
    display: none !important;
  }
  
  .calculator-inputs,
  .calculator-results,
  .info-section {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}