:root {
  /* Vintage / Retro Cream and Terracotta Theme (Light) */
  --retro-nutri-bg: #FDFBF7;
  --retro-nutri-surface: #F8F4EB;
  --retro-nutri-primary: #8C2D19;
  --retro-nutri-accent: #D99B26;
  --retro-nutri-ink: #2C2523;
  --retro-nutri-ink-light: #5C524F;
  --retro-nutri-double-border: 2px double #8C2D19;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Sans Pro', 'Helvetica Neue', sans-serif;
}

/* Scroll Progress Timeline */
@keyframes scrollProgress {
  from { width: 0%; }
  to { width: 100%; }
}
.scroll-progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--retro-nutri-primary);
  z-index: 9999;
  animation: scrollProgress linear;
  animation-timeline: scroll();
}

/* Scroll Driven Animations for Entry */
@keyframes revealOnScroll {
  from {
    opacity: 0;
    transform: translateY(35px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.vintage-scroll-reveal {
  animation: revealOnScroll linear forwards;
  animation-timeline: view();
  animation-range: entry 5% cover 30%;
}

/* General Layout Adjustments */
section {
  padding-top: 10vh;
  padding-bottom: 10vh;
}

/* Header Stylings */
.nutri-vintage-top-bar {
  background-color: var(--retro-nutri-surface);
  border-bottom: 3px double var(--retro-nutri-primary);
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 1rem 0;
}
.logo-vintage-holder img {
  height: 40px;
  object-fit: contain;
}

/* Navigation & Hamburger (CSS-only) */
.nutri-nav-panel {
  position: relative;
}
.nutri-hidden-toggle {
  display: none;
}
.nutri-burger-trigger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
}
.burger-bar {
  height: 3px;
  width: 100%;
  background-color: var(--retro-nutri-primary);
  transition: all 0.3s ease;
}
.nutri-nav-links {
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.9rem;
}
.nutri-nav-links a {
  color: var(--retro-nutri-ink);
  transition: color 0.2s ease;
}
.nutri-nav-links a:hover {
  color: var(--retro-nutri-primary);
}

/* Hero Section Settings */
.cardio-retro-hero {
  min-height: 75vh;
  position: relative;
  background-color: var(--retro-nutri-surface);
  border-bottom: 3px double var(--retro-nutri-primary);
}
.hero-bg-vintage-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg-v-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: sepia(25%) brightness(0.88);
}
.cardio-retro-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(253, 251, 247, 0.9) 0%, rgba(253, 251, 247, 0.7) 100%);
  z-index: 1;
}

/* Vintage Seals & Stamps */
.retro-seal-container {
  position: relative;
  width: 180px;
  height: 180px;
}
.retro-seal-svg {
  animation: spinSlow 30s linear infinite;
}
@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* CTA Pill Button (Preset J requirement: Double Border + Inner Shadow) */
.retro-pill-btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: 1px;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  background: var(--retro-nutri-primary);
  color: #fff;
  border: 2px solid var(--retro-nutri-primary);
  box-shadow: inset 0 0 0 3px var(--retro-nutri-surface), 0 4px 6px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}
.retro-pill-btn:hover {
  background: var(--retro-nutri-accent);
  color: var(--retro-nutri-ink);
  transform: translateY(-2px);
}
.retro-pill-btn-dark {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: 1px;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  background: var(--retro-nutri-surface);
  color: var(--retro-nutri-primary);
  border: 2px solid var(--retro-nutri-surface);
  box-shadow: inset 0 0 0 3px var(--retro-nutri-primary), 0 4px 6px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
}
.retro-pill-btn-dark:hover {
  background: var(--retro-nutri-accent);
  color: var(--retro-nutri-ink);
  transform: translateY(-2px);
}

/* Typography styles */
.vintage-h1-display {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.15;
  text-transform: uppercase;
  color: var(--retro-nutri-primary);
}
@media (max-width: 768px) {
  .vintage-h1-display {
    font-size: 2rem;
  }
}
.vintage-h2-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
  color: var(--retro-nutri-primary);
  text-align: center;
}
.vintage-lead-p {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--retro-nutri-ink-light);
}
.vintage-body-text {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--retro-nutri-ink-light);
}
.retro-badge-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--retro-nutri-accent);
  border-bottom: 2px solid var(--retro-nutri-accent);
  padding-bottom: 2px;
}
.vintage-dec-divider {
  font-size: 1.25rem;
  color: var(--retro-nutri-accent);
  letter-spacing: 4px;
  margin-top: 0.5rem;
}
.vintage-subtitle-text {
  font-size: 1.1rem;
  color: var(--retro-nutri-ink-light);
  margin-top: 1rem;
}

/* Features - Custom Stamps (Preset J requirement) */
.cardio-stamp-item {
  position: relative;
  background: var(--retro-nutri-surface);
  border: 2.5px dashed var(--retro-nutri-accent);
  border-radius: 50%;
  width: 190px;
  height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  text-align: center;
  margin: 0 auto;
  transition: all 0.3s ease;
}
.cardio-stamp-item::before {
  content: '';
  position: absolute;
  inset: -7px;
  border: 1px solid var(--retro-nutri-primary);
  border-radius: 50%;
}
.cardio-stamp-item::after {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px solid var(--retro-nutri-primary);
  border-radius: 50%;
}
.stamp-icon-box {
  margin-bottom: 0.5rem;
  z-index: 2;
}
.stamp-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--retro-nutri-primary);
  border-bottom: 1px dotted var(--retro-nutri-primary);
  padding-bottom: 2px;
  z-index: 2;
  margin-bottom: 0.25rem;
}
.stamp-desc {
  font-size: 0.68rem;
  line-height: 1.25;
  color: var(--retro-nutri-ink-light);
  z-index: 2;
}
.cardio-stamp-item:hover {
  transform: rotate(-3deg) scale(1.05);
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

/* Image Vintage Frame (Preset J: box-shadow: 3px 3px 0 accent, inset 0 0 0 4px bg) */
.vintage-frame-container {
  position: relative;
  background: var(--retro-nutri-surface);
  padding: 12px;
  border: 1px solid var(--retro-nutri-primary);
  box-shadow: 6px 6px 0px var(--retro-nutri-primary);
}
.vintage-frame-img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--retro-nutri-primary);
  filter: sepia(15%);
}

/* Content List custom bullet */
.bullet-star {
  color: var(--retro-nutri-primary);
  font-size: 1.1rem;
  line-height: 1;
}

/* Content 2 Pull Quote */
.diet-pull-quote {
  background: var(--retro-nutri-surface);
  border-left: 4px solid var(--retro-nutri-primary);
  padding: 1.5rem 1rem;
}
.quote-symbol {
  position: absolute;
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--retro-nutri-accent);
  opacity: 0.45;
  top: -15px;
  left: 10px;
}
.quote-end {
  top: auto;
  bottom: -35px;
  right: 15px;
  left: auto;
}

/* CTA Poster design */
.nutri-vintage-banner {
  background-color: var(--retro-nutri-primary);
}
.retro-poster-border {
  border: 4px double var(--retro-nutri-surface);
  padding: 3rem 2rem;
}

/* Testimonials Recommendation Letters (Preset J) */
.vintage-letter-card {
  position: relative;
  background: rgba(255, 252, 235, 0.95);
  border: 1px solid var(--retro-nutri-ink-light);
  padding: 2.5rem 1.75rem;
  box-shadow: 4px 4px 0px var(--retro-nutri-primary);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.vintage-letter-card::before {
  content: '❧';
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 1.25rem;
  color: var(--retro-nutri-accent);
}
.vintage-letter-card::after {
  content: '❧';
  position: absolute;
  bottom: 10px;
  right: 10px;
  font-size: 1.25rem;
  color: var(--retro-nutri-accent);
}
.letter-stamp-seal {
  position: absolute;
  top: 15px;
  right: 15px;
  border: 2px dashed var(--retro-nutri-primary);
  color: var(--retro-nutri-primary);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.6rem;
  padding: 2px 6px;
  transform: rotate(10deg);
  opacity: 0.75;
}
.letter-stars {
  color: var(--retro-nutri-accent);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.letter-body {
  font-style: italic;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--retro-nutri-ink);
  margin-bottom: 1rem;
}
.letter-signature {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--retro-nutri-primary);
  text-align: right;
}

/* Form Settings */
.vintage-form-card {
  background: var(--retro-nutri-surface);
  padding: 3rem;
  border: 1px solid var(--retro-nutri-primary);
  box-shadow: 8px 8px 0px var(--retro-nutri-primary);
}
@media (max-width: 640px) {
  .vintage-form-card {
    padding: 1.5rem;
  }
}
.vintage-field-label {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--retro-nutri-primary);
}
.retro-input {
  border: none;
  border-bottom: 1px dashed var(--retro-nutri-primary);
  background: transparent;
  padding: 0.5rem 0;
  color: var(--retro-nutri-ink);
  font-size: 1rem;
  width: 100%;
}
.retro-input:focus {
  outline: none;
  border-bottom-style: solid;
  border-bottom-color: var(--retro-nutri-accent);
}

/* FAQ Accordion block (Always Open, Flat display) */
.vintage-faq-card {
  background: var(--retro-nutri-surface);
  border: 1px solid var(--retro-nutri-primary);
  padding: 1.5rem;
  box-shadow: 4px 4px 0px var(--retro-nutri-primary);
}
.faq-vintage-header {
  margin-bottom: 0.75rem;
}
.faq-vintage-num {
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--retro-nutri-accent);
  border: 2px solid var(--retro-nutri-accent);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.faq-vintage-question {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  color: var(--retro-nutri-primary);
  line-height: 1.3;
}

/* Footer styling */
.nutri-vintage-base {
  background-color: var(--retro-nutri-ink);
  color: var(--retro-nutri-surface);
  padding: 4rem 0 2rem;
  border-top: 4px solid var(--retro-nutri-primary);
}
.footer-vintage-nav a {
  color: var(--retro-nutri-surface);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.footer-vintage-nav a:hover {
  color: var(--retro-nutri-accent);
}

/* Mobile responsive hamburger overrides */
@media (max-width: 1024px) {
  .nutri-burger-trigger {
    display: flex;
    z-index: 60;
  }
  .nutri-nav-links {
    position: fixed;
    top: 0;
    left: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--retro-nutri-surface);
    border-right: 3px double var(--retro-nutri-primary);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    transition: left 0.4s ease;
    z-index: 55;
    box-shadow: 5px 0 15px rgba(0,0,0,0.15);
  }
  .nutri-hidden-toggle:checked ~ .nutri-nav-links {
    left: 0;
  }
  /* Burger Animation on checked state */
  .nutri-hidden-toggle:checked ~ .nutri-burger-trigger .burger-bar:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
  }
  .nutri-hidden-toggle:checked ~ .nutri-burger-trigger .burger-bar:nth-child(2) {
    opacity: 0;
  }
  .nutri-hidden-toggle:checked ~ .nutri-burger-trigger .burger-bar:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
  }
}