@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Roboto:wght@300;400;500;700&display=swap');

:root {
  /* Thematic Variables for Healthy Lifestyle & Blood Sugar Education */
  --vitality-bg-main: #f8fafc;
  --vitality-bg-surface: #ffffff;
  --vitality-grad-start: #0284c7; /* Ocean Blue */
  --vitality-grad-end: #10b981; /* Emerald Green */
  --vitality-gradient: linear-gradient(135deg, var(--vitality-grad-start), var(--vitality-grad-end));
  --vitality-ink-dark: #0f172a;
  --vitality-ink-light: #ffffff;
  --vitality-ink-muted: #475569;
  --vitality-edge: #e2e8f0;
  --vitality-edge-accent: #cbd5e1;
  --vitality-shadow-soft: rgba(15, 23, 42, 0.08);
  --vitality-shadow-deep: rgba(15, 23, 42, 0.15);
  --vitality-action-solid: #1e293b;
  --vitality-action-hover: #020617;
  
  /* Fonts */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Roboto', sans-serif;
}

/* Base Styles */
html {
  font-family: var(--font-body);
  color: var(--vitality-ink-dark);
  background-color: var(--vitality-bg-main);
  scroll-behavior: smooth;
}

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

/* Custom Semantic Container */
.health-bounds {
  max-w-7xl;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .health-bounds { padding-left: 2rem; padding-right: 2rem; }
}

/* Header & Navigation Elements (Preset F) */
.vitality-top-bar {
  background: var(--vitality-gradient);
  box-shadow: 0 4px 6px -1px var(--vitality-shadow-soft);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-menu-link {
  color: var(--vitality-ink-light);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: opacity 0.3s ease;
}

.nav-menu-link:hover {
  opacity: 0.9;
}

.nav-menu-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--vitality-ink-light);
  transition: width 0.3s ease;
}

.nav-menu-link:hover::after {
  width: 100%;
}

/* Mobile Hamburger Menu (CSS Only) */
.mobile-toggle-checkbox {
  display: none;
}

.mobile-menu-wrap {
  display: flex;
  align-items: center;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 20px;
  width: 24px;
  cursor: pointer;
}

.hamburger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--vitality-ink-light);
  transition: all 0.3s ease;
}

.mobile-nav-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--vitality-gradient);
  flex-direction: column;
  padding: 1rem;
  box-shadow: 0 10px 15px -3px var(--vitality-shadow-soft);
}

.mobile-toggle-checkbox:checked ~ .mobile-nav-panel {
  display: flex;
}

@media (min-width: 768px) {
  .hamburger-icon-wrap { display: none; }
  .mobile-nav-panel {
    display: flex !important;
    position: static;
    flex-direction: row;
    width: auto;
    padding: 0;
    box-shadow: none;
    background: transparent;
    gap: 2rem;
  }
}

/* Custom Interactive Elements */
.action-trigger-solid {
  background-color: var(--vitality-action-solid);
  color: var(--vitality-ink-light);
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: 9999px;
  padding: 0.75rem 2rem;
  display: inline-block;
  transition: background-color 0.3s ease, transform 0.2s ease;
  text-align: center;
}

.action-trigger-solid:hover {
  background-color: var(--vitality-action-hover);
  transform: translateY(-2px);
}

/* Structure Classes */
.lifestyle-segment {
  padding: 5rem 0;
}

/* Features Rows (Preset F) */
.habit-feature-row {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--vitality-edge);
}

.habit-feature-row:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.habit-icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--vitality-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--vitality-ink-light);
  flex-shrink: 0;
}

/* Step Cards (Preset F - How it works) */
.process-card-elevated {
  background-color: var(--vitality-bg-surface);
  border-radius: 1rem;
  padding: 3rem 2rem 2rem;
  box-shadow: 0 10px 25px -5px var(--vitality-shadow-deep);
  position: relative;
  margin-top: 2rem;
  text-align: center;
}

.process-number-badge {
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--vitality-gradient);
  color: var(--vitality-ink-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: bold;
  border: 4px solid var(--vitality-bg-main);
}

/* FAQ Accordion */
.faq-wrap {
  margin-top: 2rem;
}
.faq-item {
  background: var(--vitality-bg-surface);
  border: 1px solid var(--vitality-edge);
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  padding: 1.5rem;
}
.faq-question {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--vitality-ink-dark);
  margin-bottom: 0.5rem;
}
.faq-answer {
  color: var(--vitality-ink-muted);
  line-height: 1.6;
}