/* VoltHeat — Design System & Glassmorphic Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&family=Outfit:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

:root {
  --bg-base: #06080F;
  --bg-card: rgba(15, 23, 42, 0.7);
  --bg-card-hover: rgba(22, 33, 58, 0.85);
  --bg-glass: rgba(30, 41, 59, 0.5);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(244, 63, 94, 0.45);

  --heat-flame: #F43F5E;
  --heat-glow: rgba(244, 63, 94, 0.25);
  --heat-rose: #FB7185;
  --heat-amber: #F59E0B;
  --emerald: #10B981;
  --emerald-glow: rgba(16, 185, 129, 0.25);
  --cyan: #06B6D4;
  --cyan-glow: rgba(6, 182, 212, 0.25);

  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-full: 9999px;

  --shadow-card: 0 10px 35px -10px rgba(0, 0, 0, 0.55);
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.5;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(244, 63, 94, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
}

/* Fleet Navigator */
.fleet-nav {
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.6rem 1.5rem;
}

.fleet-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.fleet-brand {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.fleet-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.fleet-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.fleet-link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.06);
}

.fleet-link.active {
  color: var(--heat-rose);
  background: rgba(244, 63, 94, 0.12);
  border-color: rgba(244, 63, 94, 0.35);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem 1.5rem;
}

/* Hero Header */
.hero-header {
  text-align: center;
  margin-bottom: 2.75rem;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--heat-rose);
  margin-bottom: 1.1rem;
}

h1 {
  font-family: var(--font-heading);
  font-size: 2.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.85rem;
}

h1 span {
  background: linear-gradient(135deg, #F43F5E 20%, #FB7185 50%, #F59E0B 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Calc Layout */
.calc-layout {
  display: grid;
  grid-template-columns: 1.15fr 1.35fr;
  gap: 1.75rem;
  margin-bottom: 3.5rem;
}

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

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: #FFFFFF;
}

/* Input Group */
.input-group {
  margin-bottom: 1.6rem;
}

.input-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.form-select:focus {
  border-color: var(--heat-rose);
}

.meta-row {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.meta-row strong {
  color: var(--heat-rose);
}

.rebate-pill {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--heat-amber);
  background: rgba(245, 158, 11, 0.1);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Fuel Button Grid */
.fuel-btn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.fuel-btn {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
}

.fuel-btn:hover {
  border-color: var(--border-active);
  background: rgba(244, 63, 94, 0.05);
}

.fuel-btn.active {
  border-color: var(--heat-flame);
  background: rgba(244, 63, 94, 0.12);
  box-shadow: 0 0 15px -4px var(--heat-glow);
}

.fuel-icon {
  font-size: 1.15rem;
  margin-bottom: 0.2rem;
}

.fuel-name {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: #FFFFFF;
}

.fuel-rate {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--heat-rose);
}

/* Sliders */
.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.slider-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--heat-rose);
  font-size: 1.05rem;
}

.form-slider {
  width: 100%;
  height: 7px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.12);
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.form-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--heat-flame);
  box-shadow: 0 0 12px var(--heat-flame);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.form-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.slider-scale {
  display: flex;
  justify-content: space-between;
  margin-top: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Tier Pill Grid */
.tier-pill-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.tier-btn {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-main);
}

.tier-btn:hover {
  border-color: var(--border-active);
  background: rgba(244, 63, 94, 0.05);
}

.tier-btn.active {
  border-color: var(--heat-flame);
  background: rgba(244, 63, 94, 0.12);
  box-shadow: 0 0 15px -4px var(--heat-glow);
}

.tier-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
}

.tier-cop {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--heat-rose);
  margin-bottom: 0.15rem;
}

.tier-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* CTA Box */
.heat-cta-box {
  margin-top: 1.75rem;
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.08), rgba(245, 158, 11, 0.04));
  border: 1px solid rgba(244, 63, 94, 0.3);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.cta-badge {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--heat-rose);
  margin-bottom: 0.4rem;
}

.cta-box-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: #FFFFFF;
}

.cta-box-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 0.9rem;
}

.btn-heat-lead {
  display: block;
  text-align: center;
  background: linear-gradient(135deg, #F43F5E, #FB7185);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 4px 15px -2px rgba(244, 63, 94, 0.4);
}

.btn-heat-lead:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(244, 63, 94, 0.55);
}

.cta-guarantee {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-align: center;
  margin-top: 0.5rem;
}

/* KPI Banner */
.kpi-banner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  margin-bottom: 1.6rem;
}

.kpi-metric {
  display: flex;
  flex-direction: column;
}

.kpi-lbl {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.kpi-huge-val {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.2rem;
}

.kpi-huge-val.green {
  color: var(--emerald);
  text-shadow: 0 0 20px var(--emerald-glow);
}

.kpi-huge-val.gold {
  color: var(--heat-amber);
}

.kpi-sub-lbl {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* Stats Matrix */
.stats-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.matrix-cell {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.matrix-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.matrix-val {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 0.2rem;
}

.matrix-val.red { color: #EF4444; }
.matrix-val.cyan { color: var(--cyan); }
.matrix-val.green { color: var(--emerald); }
.matrix-val.gold { color: var(--heat-amber); }

.matrix-sub {
  display: block;
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* Eco Banner */
.eco-banner {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-size: 0.83rem;
  margin-bottom: 1.6rem;
  color: #E2E8F0;
}

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

/* Report Box */
.report-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: rgba(244, 63, 94, 0.06);
  border: 1px dashed rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-md);
  padding: 1.15rem;
}

.report-icon {
  font-size: 1.5rem;
}

.report-text h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 0.2rem;
}

.report-text p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--heat-rose);
  color: var(--heat-rose);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 0.6rem 0.95rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.btn-outline:hover {
  background: rgba(244, 63, 94, 0.15);
  color: #FFFFFF;
}

/* Hardware Showcase */
.section-hardware {
  margin-bottom: 3.5rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2rem;
}

.section-tag {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--heat-rose);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  display: block;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.section-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.hardware-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.product-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(244, 63, 94, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
}

.product-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--heat-rose);
  background: rgba(244, 63, 94, 0.1);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 0.75rem;
}

.product-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 0.35rem;
}

.product-type {
  font-size: 0.78rem;
  color: var(--heat-amber);
  margin-bottom: 0.75rem;
}

.product-features {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.85rem;
}

.product-price {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFFFFF;
}

.product-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s ease;
}

.product-btn:hover {
  background: var(--heat-flame);
  color: #FFFFFF;
  border-color: var(--heat-flame);
}

/* FAQ */
.section-faq {
  max-width: 840px;
  margin: 0 auto 3.5rem auto;
}

.section-faq h2 {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1.75rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
}

.faq-q {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 0.45rem;
}

.faq-a {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  background: #0D1527;
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 480px;
  width: 100%;
  position: relative;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-close:hover {
  color: #FFFFFF;
}

.modal-header {
  margin-bottom: 1.5rem;
}

.modal-tag {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--heat-rose);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-top: 0.25rem;
  margin-bottom: 0.45rem;
}

.modal-header p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.modal-form .form-group {
  margin-bottom: 1.25rem;
}

.modal-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
}

.form-input:focus {
  border-color: var(--heat-rose);
}

.btn-submit {
  width: 100%;
  padding: 0.85rem;
  background: linear-gradient(135deg, #F43F5E, #FB7185);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.btn-submit:hover {
  transform: translateY(-2px);
}

.report-feedback {
  margin-top: 0.85rem;
  font-size: 0.82rem;
  text-align: center;
}

.report-feedback.success { color: var(--emerald); }
.report-feedback.error { color: #EF4444; }

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 1.75rem 1.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  margin: 0 0.3rem;
}

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