/* ==========================================================================
   EcoEnergy ROI™ - Ultra-Clean, Stripe/Apple-Grade Modern Dark UI/UX
   Maximum visual elegance, crisp typography, sleek glassmorphism
   ========================================================================== */

:root {
  /* Color Palette - Premium Onyx & Emerald Glow */
  --bg-dark: #07090e;
  --bg-card: rgba(15, 20, 32, 0.75);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(22, 30, 48, 0.85);

  --accent-primary: #10b981; /* Emerald Green */
  --accent-primary-glow: rgba(16, 185, 129, 0.2);
  --accent-blue: #3b82f6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Global Canvas */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 85% 30%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(7, 9, 14, 0.85);
  border-bottom: 1px solid var(--bg-card-border);
  padding: 14px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.brand-icon {
  font-size: 1.4rem;
}

.brand .highlight {
  color: var(--accent-primary);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 14px;
}

.preset-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--bg-card-border);
}

.control-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 600;
  padding: 0 8px;
}

.preset-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.preset-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.preset-btn.active {
  background: var(--accent-primary);
  color: #051c14;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(16, 185, 129, 0.3);
}

select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  color: #fff;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: var(--transition);
}

select:hover, select:focus {
  border-color: var(--accent-primary);
  background: rgba(255, 255, 255, 0.08);
}

select option {
  background-color: #0f1420;
  color: #fff;
}

/* Breadcrumbs Bar */
.breadcrumb-bar {
  padding-top: 14px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.breadcrumb-list a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.breadcrumb-list a:hover {
  color: var(--accent-primary);
}

/* Hero Section */
.hero {
  padding: 40px 0 28px;
  text-align: center;
}

.hero-container {
  max-width: 860px;
}

.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  color: var(--accent-amber);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-primary);
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.pulse {
  width: 7px;
  height: 7px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-primary);
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 14px;
  color: #ffffff;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.stat-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  padding: 18px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-subtle);
}

.stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.stat-desc {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 600;
}

/* Calculator Tabs Bar - Sleek Segmented Switch */
.calculator-tabs {
  display: flex;
  background: rgba(255, 255, 255, 0.03);
  padding: 6px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--bg-card-border);
  gap: 6px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.tab-btn {
  flex: 1;
  min-width: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

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

@media (max-width: 960px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

/* Ultra-Clean Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
}

.calc-panel {
  display: none;
  flex-direction: column;
  gap: 18px;
}

.calc-panel.active {
  display: flex;
}

.panel-header h2 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 2px;
}

.panel-header p {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Clean Input Controls */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.input-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.value-display {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(16, 185, 129, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Custom Sleek Range Sliders */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  outline: none;
  margin: 6px 0;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  box-shadow: 0 0 12px var(--accent-primary);
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.help-text {
  font-size: 0.76rem;
  color: var(--text-dim);
}

/* Clean Results Panel */
.summary-results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.res-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--bg-card-border);
  padding: 16px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}

.res-box.highlight-primary {
  border-color: rgba(16, 185, 129, 0.35);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), transparent);
}

.res-box.highlight-success {
  border-color: rgba(59, 130, 246, 0.35);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), transparent);
}

.res-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.res-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
}

.highlight-primary .res-value { color: var(--accent-primary); }
.highlight-success .res-value { color: var(--accent-blue); }

.res-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* SVG Chart Box */
.chart-container {
  background: rgba(7, 10, 16, 0.6);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 20px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.chart-header h3 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
}

.chart-legend {
  display: flex;
  gap: 12px;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 4px;
}
.dot.green { background: var(--accent-primary); }
.dot.red { background: var(--accent-rose); }

.svg-chart-wrapper {
  width: 100%;
  height: 200px;
}

/* Buttons & Action Bar */
.action-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: #041810;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.25);
}

.btn-primary:hover {
  background: #059669;
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid var(--bg-card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--bg-card-border);
}

.btn-outline:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

/* Affiliate Card */
.affiliate-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(59, 130, 246, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  position: relative;
}

.affiliate-badge {
  position: absolute;
  top: -9px;
  right: 14px;
  background: var(--accent-amber);
  color: #000;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 1px 8px;
  border-radius: var(--radius-pill);
}

.affiliate-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.affiliate-text h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.affiliate-text p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* AI Mini TL;DR Box in FAQ */
.tldr-box-mini {
  background: rgba(16, 185, 129, 0.06);
  border-left: 3px solid var(--accent-primary);
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  color: #fff;
  line-height: 1.5;
}

/* Subsidies, Guides & City Benchmarks */
.subsidy-section, .guides-section, .city-benchmarks, .faq-section {
  padding: 48px 0;
}

.section-title {
  margin-bottom: 32px;
}

.section-title h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-top: 4px;
}

.subtext {
  color: var(--accent-primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.subsidy-grid, .guides-grid, .faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .subsidy-grid, .guides-grid, .faq-grid {
    grid-template-columns: 1fr;
  }
}

.subsidy-card, .guide-card, .faq-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  padding: 24px;
  border-radius: var(--radius-lg);
}

.tech-table, .city-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.tech-table th, .tech-table td, .city-table th, .city-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--bg-card-border);
  text-align: left;
}

.tech-table th, .city-table th {
  background: rgba(255, 255, 255, 0.03);
  color: #fff;
  font-weight: 700;
}

.tech-table td, .city-table td {
  color: var(--text-muted);
}

/* Footer */
.footer {
  background: #04060a;
  border-top: 1px solid var(--bg-card-border);
  padding: 40px 0 28px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  gap: 32px;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 10px;
}

.footer-links-col h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.footer-links-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: var(--transition);
}

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

/* Print Only */
.print-only { display: none; }

@media print {
  body { background: #fff !important; color: #000 !important; }
  .navbar, .hero, .calculator-tabs, .action-bar, .affiliate-box, .faq-section, .footer, .subsidy-section, .guides-section, .city-benchmarks, .breadcrumb-bar { display: none !important; }
  .workspace-grid { grid-template-columns: 1fr !important; }
  .card { border: none !important; box-shadow: none !important; padding: 0 !important; background: transparent !important; }
  .print-only { display: block !important; }
}