:root {
  --thermo-bg: #0b1320;
  --thermo-surface: #131e30;
  --thermo-surface-hover: #1c2b42;
  --thermo-core-glow: #f59e0b;
  --thermo-accent-flame: #ea580c;
  --thermo-text-main: #f8fafc;
  --thermo-text-muted: #94a3b8;
  --thermo-border-subtle: rgba(245, 158, 11, 0.2);
  --thermo-gradient-main: linear-gradient(135deg, #131e30 0%, #0b1320 100%);
  --thermo-gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
}

body.frost-guard-shell {
  margin: 0;
  padding: 0;
  background-color: var(--thermo-bg);
  color: var(--thermo-text-main);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
}

/* Scroll-driven Reading Progress Bar */
.reading-progress-line {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--thermo-gradient-accent);
  z-index: 100;
  transform-origin: 0%;
  animation: growProgress linear;
  animation-timeline: scroll();
}

@keyframes growProgress {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* Inner Container */
.pelvic-core-wrapper {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Sections */
.pelvic-heat-segment {
  padding-top: 10dvh;
  padding-bottom: 10dvh;
  position: relative;
  animation: fadeInView linear both;
  animation-timeline: view();
  animation-range: entry 10% cover 30%;
}

@keyframes fadeInView {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Header */
.thermal-header-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 19, 32, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.thermo-link-item {
  color: var(--thermo-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.thermo-link-item:hover {
  color: var(--thermo-core-glow);
}

/* Responsive Hamburger Hack */
#mobile-toggle-checkbox:checked ~ .thermal-nav-holder {
  display: block;
}

@media (max-width: 767px) {
  .thermal-nav-holder {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--thermo-surface);
    padding: 1.5rem;
    border-bottom: 1px solid var(--thermo-border-subtle);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.5);
  }
}

/* Buttons */
.warmth-action-trigger {
  background: var(--thermo-gradient-accent);
  color: #ffffff;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.35);
  border: none;
  cursor: pointer;
}

.warmth-action-trigger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
  filter: brightness(1.05);
}

/* Hero background elements */
.hero-svg-bg-layer {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 800px;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Preset E Stat Pillar */
.potency-metric-pillar {
  background: var(--thermo-surface);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.potency-metric-pillar:hover {
  transform: translateY(-4px);
  border-color: var(--thermo-border-subtle);
}

/* Preset E Top-Border Features Card */
.thermal-shield-box {
  background: var(--thermo-surface);
  border-top: 4px solid var(--thermo-core-glow);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease;
}

.thermal-shield-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px -5px rgba(245, 158, 11, 0.15);
}

/* CTA Strip */
.heat-pulse-banner {
  background: var(--thermo-surface);
  border-left: 6px solid var(--thermo-accent-flame);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Overlay Badge for Image */
.badge-overlay-stat {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  background: rgba(19, 30, 48, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--thermo-border-subtle);
}

/* Testimonial Cards */
.vital-voice-item {
  background: var(--thermo-surface);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* FAQ Rows */
.thermo-faq-row {
  background: var(--thermo-surface);
  border-bottom: 2px solid rgba(245, 158, 11, 0.15);
}

/* Form Styles */
.vital-contact-grid {
  background: var(--thermo-surface);
  border: 1px solid var(--thermo-border-subtle);
}

.thermo-field-input {
  background: var(--thermo-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--thermo-text-main);
  outline: none;
  transition: border-color 0.2s ease;
}

.thermo-field-input:focus {
  border-color: var(--thermo-core-glow);
}