/**
 * Nourish Beyond - Master Design System & UI Architecture
 * World-Class Digital Health & Nutrition Aesthetic
 * Zero-Bloat | High Performance | WCAG AAA Compliant
 * Version: 1.0.0 (Production Complete)
 */

/* ==========================================================================
   1. DESIGN TOKENS & VARIABLES
   ========================================================================== */
:root {
  /* Organic & Warm Palette */
  --nb-bg-main: #FDFBF7;          /* Warm Oat / Sand */
  --nb-bg-surface: #FFFFFF;       /* Pure White for Cards */
  --nb-primary: #2C4A3E;          /* Deep Sage / Forest Green */
  --nb-primary-light: #E8EFEA;    /* Soft Sage Tint */
  --nb-accent: #D96B43;           /* Terracotta / Burnt Orange */
  --nb-accent-hover: #C55A33;
  --nb-text-dark: #1A1D1C;        /* Charcoal Dark (High Contrast) */
  --nb-text-muted: #646A67;       /* Muted Gray-Green */
  --nb-border: rgba(44, 74, 62, 0.12);

  /* Typography with Full Greek Subset Support */
  --nb-font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --nb-font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Elevation & Shadows */
  --nb-shadow-sm: 0 4px 12px rgba(44, 74, 62, 0.04);
  --nb-shadow-md: 0 12px 32px rgba(44, 74, 62, 0.08);
  --nb-shadow-lg: 0 20px 48px rgba(44, 74, 62, 0.12);
  --nb-radius-lg: 24px;
  --nb-radius-md: 14px;
  --nb-radius-pill: 50px;

  /* Transitions */
  --nb-ease: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   2. CORE RESET & BASE STYLES
   ========================================================================== */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--nb-bg-main);
  color: var(--nb-text-dark);
  font-family: var(--nb-font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--nb-font-heading);
  color: var(--nb-primary);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

a { text-decoration: none; color: inherit; transition: var(--nb-ease); }
ul { list-style: none !important; margin: 0; padding: 0; }

/* ==========================================================================
   3. MASTER CONTAINER LOCKING (Zero Full-Width Bleed)
   ========================================================================== */
.nb-hero-section,
.nb-section {
  max-width: 1180px !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 32px !important;
  padding-right: 32px !important;
}

.nb-section { padding-top: 100px !important; padding-bottom: 100px !important; }

.nb-section-bg {
  background-color: #F6F3EC;
  border-top: 1px solid var(--nb-border);
  border-bottom: 1px solid var(--nb-border);
}

.nb-section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.nb-section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

/* ==========================================================================
   4. PREMIUM BUTTONS & CTAS
   ========================================================================== */
.nb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--nb-accent);
  color: #FFFFFF;
  font-family: var(--nb-font-heading);
  font-size: 1rem;
  font-weight: 700;
  padding: 16px 32px;
  border-radius: var(--nb-radius-pill);
  border: 2px solid transparent;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(217, 107, 67, 0.25);
  transition: var(--nb-ease);
}

.nb-btn:hover {
  background: var(--nb-accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(217, 107, 67, 0.35);
  color: #FFFFFF;
}

.nb-btn-outline {
  background: transparent;
  color: var(--nb-primary);
  border-color: var(--nb-border);
  box-shadow: none;
}

.nb-btn-outline:hover {
  background: var(--nb-primary-light);
  border-color: var(--nb-primary);
  color: var(--nb-primary);
}

/* ==========================================================================
   5. GLASSMORPHIC STICKY HEADER
   ========================================================================== */
.nb-site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(253, 251, 247, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--nb-border);
  padding: 18px 0;
}

.nb-header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nb-logo-main {
  font-family: var(--nb-font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--nb-primary);
  letter-spacing: -0.5px;
}

.nb-nav-list {
  display: flex !important;
  flex-direction: row !important;
  gap: 36px;
  align-items: center;
  list-style: none !important;
}

.nb-nav-list li { list-style-type: none !important; }

.nb-nav-list li a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--nb-text-dark);
  position: relative;
  padding: 6px 0;
}

.nb-nav-list li a:hover { color: var(--nb-primary); }
.nb-nav-list li a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--nb-accent);
  transition: var(--nb-ease);
}
.nb-nav-list li a:hover::after { width: 100%; }

/* ==========================================================================
   6. EDITORIAL HERO SECTION (2-Column Grid)
   ========================================================================== */
.nb-hero-section {
  margin-top: 40px !important;
  margin-bottom: 80px !important;
  display: grid !important;
  grid-template-columns: 1.1fr 0.9fr !important;
  gap: 64px;
  align-items: center;
}

.nb-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--nb-primary-light);
  color: var(--nb-primary);
  padding: 8px 18px;
  border-radius: var(--nb-radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
  border: 1px solid rgba(44, 74, 62, 0.15);
}

.nb-hero-title {
  font-size: clamp(2.6rem, 5vw, 4rem);
  margin-bottom: 24px;
}

.nb-hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  color: var(--nb-text-muted);
  margin-bottom: 40px;
  max-width: 560px;
  font-weight: 400;
}

.nb-hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.nb-hero-visual-card {
  position: relative;
  background: var(--nb-bg-surface);
  border: 1px solid var(--nb-border);
  border-radius: var(--nb-radius-lg);
  padding: 48px 40px;
  box-shadow: var(--nb-shadow-lg);
  text-align: center;
  overflow: hidden;
}

.nb-hero-visual-card::before {
  content: "";
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(232,239,234,0.6) 0%, rgba(255,255,255,0) 70%);
  z-index: 0;
  pointer-events: none;
}

.nb-visual-content { position: relative; z-index: 1; }

.nb-avatar-wrapper {
  width: 120px; height: 120px;
  background: var(--nb-bg-main);
  border: 3px solid var(--nb-accent);
  border-radius: 50%;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  box-shadow: var(--nb-shadow-md);
}

.nb-bio-name { font-size: 1.6rem; color: var(--nb-primary); margin-bottom: 6px; }
.nb-bio-title { font-size: 0.9rem; color: var(--nb-text-muted); font-weight: 600; margin-bottom: 32px; }

.nb-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  border-top: 1px solid var(--nb-border);
  padding-top: 28px;
}

.nb-stat-item { display: flex; flex-direction: column; }
.nb-stat-value { font-family: var(--nb-font-heading); font-size: 1.5rem; font-weight: 800; color: var(--nb-accent); }
.nb-stat-label { font-size: 0.8rem; color: var(--nb-text-muted); font-weight: 600; text-transform: uppercase; }

/* ==========================================================================
   7. PHILOSOPHY 3-COLUMN GRID
   ========================================================================== */
.nb-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.nb-feature-card {
  background: var(--nb-bg-surface);
  padding: 40px 32px;
  border-radius: var(--nb-radius-lg);
  border: 1px solid var(--nb-border);
  transition: var(--nb-ease);
  box-shadow: var(--nb-shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.nb-feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--nb-shadow-lg);
  border-color: var(--nb-primary);
}

.nb-feature-icon {
  font-size: 2.8rem;
  margin-bottom: 24px;
  display: inline-block;
  background: var(--nb-primary-light);
  padding: 16px;
  border-radius: var(--nb-radius-md);
}

.nb-feature-card h3 { font-size: 1.35rem; margin-bottom: 12px; }

/* ==========================================================================
   8. MODERN FORMS & INPUTS
   ========================================================================== */
.nb-form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.nb-form-group label { font-family: var(--nb-font-heading); font-size: 0.9rem; font-weight: 700; color: var(--nb-text-dark); }

.nb-input, .nb-select, .nb-textarea {
  width: 100%;
  background: var(--nb-bg-main);
  border: 1.5px solid var(--nb-border);
  border-radius: var(--nb-radius-md);
  font-family: var(--nb-font-body);
  font-size: 1rem;
  padding: 14px 18px;
  color: var(--nb-text-dark);
  transition: var(--nb-ease);
  outline: none;
}

.nb-input:focus, .nb-select:focus, .nb-textarea:focus {
  background: #FFFFFF;
  border-color: var(--nb-primary);
  box-shadow: 0 0 0 4px var(--nb-primary-light);
}

.nb-calc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.nb-form-group.full-width { grid-column: 1 / -1; }

/* ==========================================================================
   9. INTERACTIVE BMR & BOOKING ENGINE CONTAINERS
   ========================================================================== */
.nb-calculator-card, .nb-booking-wrapper {
  max-width: 840px !important;
  margin: 0 auto;
  background: var(--nb-bg-surface);
  border: 1px solid var(--nb-border);
  border-radius: var(--nb-radius-lg);
  padding: 48px;
  box-shadow: var(--nb-shadow-md);
  position: relative;
  overflow: hidden;
}

.nb-calc-results {
  margin-top: 36px; padding-top: 36px;
  border-top: 2px dashed var(--nb-border);
  display: none;
  animation: nbFadeInUp 0.5s ease forwards;
}

@keyframes nbFadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.nb-metrics-display { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 24px 0 36px; }

.nb-metric-box {
  background: var(--nb-primary-light);
  border: 1px solid rgba(44, 74, 62, 0.15);
  border-radius: var(--nb-radius-md);
  padding: 24px;
  text-align: center;
}

.nb-metric-value { display: block; font-family: var(--nb-font-heading); font-size: 2.2rem; font-weight: 800; color: var(--nb-primary); line-height: 1.1; }
.nb-metric-label { font-size: 0.85rem; font-weight: 700; color: var(--nb-text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 6px; display: block; }

.nb-lead-capture-form {
  background: #F8FAF9;
  border: 1.5px solid var(--nb-primary);
  border-radius: var(--nb-radius-md);
  padding: 32px;
  text-align: left;
}

/* ==========================================================================
   10. MULTI-STEP BOOKING ENGINE (WIZARD UI)
   ========================================================================== */
.nb-step-progress {
  display: flex; justify-content: space-between;
  margin-bottom: 40px; padding-bottom: 24px;
  border-bottom: 2px solid var(--nb-border);
  position: relative;
}

.nb-step-item { display: flex; align-items: center; gap: 12px; font-family: var(--nb-font-heading); font-size: 0.95rem; font-weight: 700; color: var(--nb-text-muted); transition: var(--nb-ease); }
.nb-step-item.active { color: var(--nb-primary); }

.nb-step-number {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--nb-bg-main);
  border: 2px solid var(--nb-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 800; transition: var(--nb-ease);
}

.nb-step-item.active .nb-step-number {
  background: var(--nb-primary);
  border-color: var(--nb-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(44, 74, 62, 0.25);
}

.nb-step-panel { display: none; }
.nb-step-panel.active { display: block; animation: nbFadeInUp 0.4s ease forwards; }

.nb-services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 24px 0 32px; }

.nb-service-card {
  background: var(--nb-bg-main);
  border: 2px solid var(--nb-border);
  border-radius: var(--nb-radius-md);
  padding: 24px; cursor: pointer; transition: var(--nb-ease);
  display: flex; flex-direction: column; gap: 8px;
}

.nb-service-card:hover, .nb-service-card.selected {
  background: var(--nb-primary-light);
  border-color: var(--nb-primary);
  transform: translateY(-4px);
  box-shadow: var(--nb-shadow-sm);
}

.nb-service-title { font-family: var(--nb-font-heading); font-size: 1.15rem; font-weight: 800; color: var(--nb-primary); }
.nb-service-desc { font-size: 0.88rem; color: var(--nb-text-muted); line-height: 1.5; margin: 0; }

.nb-timeslots-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 12px; margin-top: 16px; }

.nb-slot-btn {
  background: var(--nb-bg-main);
  border: 1.5px solid var(--nb-border);
  border-radius: var(--nb-radius-md);
  padding: 12px; text-align: center; font-weight: 700; color: var(--nb-text-dark); cursor: pointer; transition: var(--nb-ease);
}

.nb-slot-btn:hover, .nb-slot-btn.selected {
  background: var(--nb-primary); color: #FFFFFF; border-color: var(--nb-primary);
  box-shadow: 0 4px 12px rgba(44, 74, 62, 0.2);
}

.nb-booking-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--nb-border); }

/* ==========================================================================
   11. BIOGRAPHY SECTION 2-COLUMN GRID (Locked Architecture)
   ========================================================================== */
.nb-bio-grid {
  display: grid !important;
  grid-template-columns: 340px 1fr !important;
  gap: 56px !important;
  align-items: center;
  background: var(--nb-bg-surface);
  border: 1.5px solid var(--nb-border);
  border-radius: var(--nb-radius-lg);
  padding: 48px;
  box-shadow: var(--nb-shadow-md);
}

.nb-bio-avatar-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--nb-bg-main);
  border-radius: var(--nb-radius-md);
  border: 1px solid var(--nb-border);
}

.nb-bio-avatar-circle {
  width: 160px; height: 160px;
  border-radius: 50%;
  background: var(--nb-primary-light);
  margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 4.5rem;
  border: 3px solid var(--nb-accent);
  box-shadow: var(--nb-shadow-sm);
}

/* ==========================================================================
   12. FAQ ACCORDION CARDS
   ========================================================================== */
.nb-faq-list {
  max-width: 840px !important;
  margin: 0 auto;
  display: flex; flex-direction: column; gap: 16px;
}

.nb-faq-item {
  background: var(--nb-bg-surface);
  border: 1.5px solid var(--nb-border);
  border-radius: var(--nb-radius-md);
  padding: 24px 28px;
  transition: var(--nb-ease);
  box-shadow: var(--nb-shadow-sm);
}

.nb-faq-item:hover { border-color: var(--nb-primary); box-shadow: var(--nb-shadow-md); }

.nb-faq-item details summary {
  font-family: var(--nb-font-heading); font-weight: 700; font-size: 1.15rem; color: var(--nb-primary);
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; outline: none;
}

.nb-faq-item details summary::-webkit-details-marker { display: none; }
.nb-faq-item details summary::after { content: "+"; font-size: 1.6rem; font-weight: 400; color: var(--nb-accent); transition: var(--nb-ease); line-height: 1; }
.nb-faq-item details[open] summary::after { transform: rotate(45deg); color: var(--nb-primary); }

.nb-faq-item details p {
  margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--nb-border);
  color: var(--nb-text-muted); font-size: 0.98rem; line-height: 1.7; margin-bottom: 0;
}

/* ==========================================================================
   13. GLOBAL FOOTER ARCHITECTURE (Deep Sage Green)
   ========================================================================== */
.nb-site-footer {
  background-color: var(--nb-primary);
  color: #E8EFEA;
  padding: 80px 32px 32px;
  margin-top: 100px;
  border-top: 4px solid var(--nb-accent);
}

.nb-footer-container { max-width: 1280px; margin: 0 auto; }
.nb-footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px; margin-bottom: 64px; }

.nb-footer-logo { font-family: var(--nb-font-heading); font-size: 1.8rem; font-weight: 800; color: #FFFFFF; display: inline-block; margin-bottom: 16px; }
.nb-footer-bio { color: rgba(232, 239, 234, 0.8); font-size: 0.95rem; line-height: 1.65; margin-bottom: 24px; }
.nb-trust-badges { display: flex; flex-wrap: wrap; gap: 8px; }

.nb-badge-pill {
  background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 6px 12px; border-radius: var(--nb-radius-pill); font-size: 0.8rem; font-weight: 600; color: #FFFFFF;
}

.nb-footer-heading {
  font-family: var(--nb-font-heading); color: #FFFFFF; font-size: 1.15rem; font-weight: 700;
  margin-bottom: 24px; position: relative; padding-bottom: 10px;
}

.nb-footer-heading::after { content: ''; position: absolute; bottom: 0; left: 0; width: 32px; height: 2.5px; background: var(--nb-accent); }

.nb-footer-links, .nb-footer-info, .nb-footer-contact { list-style: none !important; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.nb-footer-links li a, .nb-footer-contact li a { color: rgba(232, 239, 234, 0.8); transition: var(--nb-ease); font-size: 0.95rem; }
.nb-footer-links li a:hover, .nb-footer-contact li a:hover { color: #FFFFFF; padding-left: 6px; }
.nb-footer-contact li { display: flex; gap: 12px; color: rgba(232, 239, 234, 0.8); font-size: 0.95rem; align-items: flex-start; }

.nb-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12); padding-top: 32px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; font-size: 0.88rem; color: rgba(232, 239, 234, 0.6);
}

.nb-legal-links { display: flex; gap: 16px; }
.nb-legal-links a { color: rgba(232, 239, 234, 0.6); }
.nb-legal-links a:hover { color: #FFFFFF; }

/* ==========================================================================
   14. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 960px) {
  .nb-hero-section, .nb-bio-grid { grid-template-columns: 1fr !important; gap: 48px !important; text-align: center; }
  .nb-hero-subtitle { margin-left: auto; margin-right: auto; }
  .nb-hero-actions { justify-content: center; }
  .nb-nav-list { display: none !important; }
  .nb-grid-3 { grid-template-columns: 1fr; }
  .nb-calculator-card, .nb-booking-wrapper, .nb-bio-grid { padding: 32px 24px !important; }
  .nb-calc-grid, .nb-services-grid { grid-template-columns: 1fr; }
  .nb-metrics-display { grid-template-columns: 1fr; }
  .nb-footer-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
}

@media (max-width: 600px) {
  .nb-step-item span:not(.nb-step-number) { display: none; }
  .nb-footer-grid { grid-template-columns: 1fr; }
  .nb-footer-bottom { flex-direction: column; text-align: center; }
  .nb-booking-actions { flex-direction: column-reverse; gap: 12px; }
  .nb-booking-actions .nb-btn { width: 100% !important; }
}
/* ==========================================================================
   FIX: BOOKING ENGINE SUBMIT BUTTON SPECIFICITY & HIGH-CONTRAST
   ========================================================================== */
.nb-booking-actions button[type="submit"],
.nb-booking-actions .nb-btn-primary,
#nb-booking-form button[type="submit"] {
    background-color: var(--nb-accent) !important; /* Terracotta #D96B43 */
    color: #FFFFFF !important;
    font-family: var(--nb-font-heading) !important;
    font-weight: 800 !important;
    font-size: 1.05rem !important;
    padding: 16px 36px !important;
    border-radius: var(--nb-radius-pill) !important;
    border: none !important;
    box-shadow: 0 8px 20px rgba(217, 107, 67, 0.3) !important;
    cursor: pointer !important;
    transition: var(--nb-ease) !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 10px !important;
}

.nb-booking-actions button[type="submit"]:hover,
#nb-booking-form button[type="submit"]:hover {
    background-color: var(--nb-accent-hover) !important; /* Darker Terracotta #C55A33 */
    transform: translateY(-3px) !important;
    box-shadow: 0 12px 28px rgba(217, 107, 67, 0.45) !important;
    color: #FFFFFF !important;
}