/* ==========================================================================
   HOBBY HAT — Design System & Global Styles
   Design Direction: Minimal, calm, intelligent, playful, trustworthy, parent-friendly
   ========================================================================== */

/* Google Fonts: Plus Jakarta Sans (Headings) & Inter (Body) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  /* Core Color Palette */
  --color-ink: #17202A;
  --color-text: #3F4852;
  --color-muted: #78828C;
  --color-background: #F8F7F3;
  --color-surface: #FFFFFF;
  --color-border: #E6E4DE;
  --color-border-hover: #CBD2D9;
  
  /* Primary Teal Tokens */
  --color-primary: #2E6F68;
  --color-primary-dark: #245953;
  --color-primary-soft: #E4F0ED;
  --color-primary-light: #F2F8F6;

  /* Accent Amber Tokens */
  --color-accent: #E7A65A;
  --color-accent-dark: #C68538;
  --color-accent-soft: #FBF0DF;

  /* Semantics */
  --color-success: #3F806A;
  --color-info: #477A9B;

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Spacing */
  --space-2: 4px;
  --space-3: 8px;
  --space-4: 12px;
  --space-5: 16px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 48px;
  --space-9: 64px;
  --space-10: 80px;
  --space-11: 96px;
  --space-12: 120px;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  /* Container */
  --container-width: 1180px;

  /* Shadows */
  --shadow-soft: 0 8px 30px rgba(23, 32, 42, 0.06);
  --shadow-card: 0 4px 20px rgba(23, 32, 42, 0.04);
  --shadow-hover: 0 12px 32px rgba(23, 32, 42, 0.09);
  --shadow-dropdown: 0 16px 36px rgba(23, 32, 42, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
  --transition-smooth: 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-ink);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.35rem, 4vw + 1rem, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.85rem, 2.5vw + 1rem, 2.6rem);
}

h3 {
  font-size: 1.45rem;
  font-weight: 650;
}

p {
  color: var(--color-text);
  font-size: 1.05rem;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: var(--space-10);
}

.section-alt {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.section-header.left-aligned {
  text-align: left;
  margin-inline: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-4);
}

.badge.accent {
  background-color: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-description {
  color: var(--color-muted);
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.975rem;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(46, 111, 104, 0.25);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
}

.btn-amazon {
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
  border: 1px solid rgba(46, 111, 104, 0.2);
  width: 100%;
  padding: 10px 16px;
  font-size: 0.925rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-amazon:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.btn-amazon svg {
  transition: transform var(--transition-fast);
}

.btn-amazon:hover svg {
  transform: translateX(3px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(248, 247, 243, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: 74px;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  filter: drop-shadow(0 2px 5px rgba(17, 24, 39, 0.12));
}

.brand-logo:hover .brand-logo-img {
  transform: translateY(-2px) scale(1.08);
  filter: drop-shadow(0 4px 10px rgba(46, 111, 104, 0.28));
}

.brand-symbol {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(46, 111, 104, 0.2);
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  line-height: 1.1;
}

.brand-tagline {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--color-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-link {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding-block: 4px;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 8px;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding-top: var(--space-9);
  padding-bottom: var(--space-10);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: var(--space-8);
}

.hero-content {
  max-width: 580px;
}

.hero-title {
  margin-bottom: var(--space-5);
  line-height: 1.15;
}

.hero-title span.highlight {
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.hero-desc {
  font-size: 1.18rem;
  color: var(--color-text);
  margin-bottom: var(--space-7);
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-7);
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-muted);
  font-weight: 500;
}

.trust-item svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* Hero Visual Art */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-art-frame {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at center, #FFFFFF 0%, #F3F1EC 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-floater {
  position: absolute;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 24px rgba(23, 32, 42, 0.07);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink);
  animation: floatSubtle 5s ease-in-out infinite alternate;
}

.floater-1 {
  top: 18px;
  left: -20px;
}

.floater-2 {
  bottom: 24px;
  right: -15px;
  animation-delay: -2.5s;
}

@keyframes floatSubtle {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-8px); }
}

/* Orbiting Toys & Hobbies Emblems */
.hero-hobby-icon {
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.35s ease;
  cursor: pointer;
  transform-origin: center;
  transform-box: fill-box;
}

.hero-hobby-icon:hover {
  transform: scale(1.18);
  filter: drop-shadow(0 8px 18px rgba(23, 32, 42, 0.18));
}

/* Age Selector Grid */
.age-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.age-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-base);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow-card);
}

.age-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.age-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.age-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.age-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  background-color: var(--color-background);
  border-radius: var(--radius-pill);
  color: var(--color-muted);
}

.age-card-title {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.age-card-stage {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.age-card-focus {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.5;
  margin-bottom: var(--space-5);
}

.age-card-footer {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: auto;
}

.age-card-footer svg {
  transition: transform var(--transition-fast);
}

.age-card:hover .age-card-footer svg {
  transform: translateX(4px);
}

/* Age Section / Toy Catalog */
.stage-block {
  padding-block: var(--space-9);
  scroll-margin-top: 80px;
  border-bottom: 1px solid var(--color-border);
}

.stage-block:last-of-type {
  border-bottom: none;
}

.stage-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.stage-header-info {
  max-width: 640px;
}

.stage-label-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.stage-pill {
  padding: 4px 12px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.stage-h2 {
  font-size: 1.75rem;
  margin-bottom: 6px;
}

.stage-desc {
  color: var(--color-text);
  font-size: 0.98rem;
}

.stage-pillars-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pillar-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-ink);
}

/* Product Cards Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 24px;
}

.product-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}

.product-img-box {
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: #FAF9F6;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

.product-icon-wrap {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(46, 111, 104, 0.15);
}

.product-rating-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--color-border);
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: 4px;
}

.product-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.product-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

.product-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.product-why {
  font-size: 0.88rem;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 14px;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
  margin-top: auto;
}

.benefit-tag {
  font-size: 0.74rem;
  font-weight: 500;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

/* 15+ Hobbies Section */
.hobby-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.hobby-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.hobby-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.hobby-card-photo-box {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  margin-bottom: 14px;
  background-color: #E2E8F0;
}

.hobby-card-photo-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
  display: block;
}

.hobby-card:hover .hobby-card-photo-box img {
  transform: scale(1.06);
}

.hobby-category-pill {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(23, 32, 42, 0.82);
  backdrop-filter: blur(6px);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.hobby-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--color-ink);
}

.hobby-desc {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.5;
  margin-bottom: 12px;
}

.hobby-tool-highlight {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  color: var(--color-ink);
  margin-bottom: 14px;
}

.hobby-tool-highlight strong {
  color: var(--color-primary-dark);
}

.btn-hobby-explore {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #FF9900 0%, #E87A00 100%);
  color: #111827 !important;
  font-size: 0.84rem;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(232, 122, 0, 0.25);
  margin-top: auto;
}

.btn-hobby-explore:hover {
  background: linear-gradient(135deg, #FFA724 0%, #F58700 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232, 122, 0, 0.35);
  color: #000000 !important;
}

/* Science of Play Section */
.science-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px;
  margin-bottom: var(--space-9);
}

.pillar-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.pillar-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-accent-soft);
  color: var(--color-accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pillar-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-ink);
}

.pillar-desc {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.4;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.article-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-hover);
}

.article-category {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.article-title {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 12px;
}

.article-summary {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Smart Quiz Section */
.quiz-wrapper {
  max-width: 760px;
  margin-inline: auto;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-soft);
}

.quiz-stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 280px;
  margin-inline: auto;
  margin-bottom: 32px;
  position: relative;
}

.quiz-stepper::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 24px;
  right: 24px;
  height: 2px;
  background-color: var(--color-border);
  z-index: 1;
}

.step-indicator {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.step-indicator.active .step-number {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
}

.step-indicator.completed .step-number {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.step-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-muted);
}

.step-indicator.active .step-label {
  color: var(--color-ink);
}

.quiz-step-pane {
  display: none;
}

.quiz-step-pane.active {
  display: block;
  animation: fadeIn 250ms ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-question-title {
  font-size: 1.35rem;
  margin-bottom: 8px;
  text-align: center;
}

.quiz-question-sub {
  color: var(--color-muted);
  text-align: center;
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.quiz-opt-btn {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  text-align: center;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-ink);
  transition: all var(--transition-fast);
}

.quiz-opt-btn:hover {
  border-color: var(--color-primary);
  background-color: var(--color-surface);
}

.quiz-opt-btn.selected {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.quiz-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

.quiz-result-box {
  text-align: center;
  padding: 16px;
}

.quiz-result-badge {
  display: inline-block;
  background-color: var(--color-accent-soft);
  color: var(--color-accent-dark);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.quiz-result-title {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.quiz-result-text {
  font-size: 1rem;
  color: var(--color-text);
  max-width: 540px;
  margin-inline: auto;
  margin-bottom: 24px;
}

.quiz-suggested-card {
  text-align: left;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
}

/* FAQ Section */
.faq-accordion {
  max-width: 780px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--color-primary);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--color-ink);
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 280ms cubic-bezier(0, 1, 0, 1);
  padding-inline: 24px;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  transition: max-height 320ms ease-in-out;
  padding-bottom: 20px;
}

.faq-answer p {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Amazon Affiliate Banner */
.affiliate-banner-section {
  padding-block: var(--space-7);
  background-color: #F1EFEA;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.affiliate-banner-content {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  max-width: 880px;
  margin-inline: auto;
}

.affiliate-banner-content svg {
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.affiliate-banner-text h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.affiliate-banner-text p {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.55;
}

/* Site Footer */
.site-footer {
  background-color: #17202A;
  color: #E6E4DE;
  padding-top: var(--space-10);
  padding-bottom: var(--space-8);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-9);
}

.footer-brand {
  max-width: 340px;
}

.footer-brand-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.footer-brand-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 50%;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.4));
  transition: transform var(--transition-fast);
}

.footer-brand-header:hover .footer-brand-logo {
  transform: scale(1.08) rotate(-4deg);
}

.footer-logo-title {
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0;
  line-height: 1.1;
}

.footer-tagline {
  color: var(--color-accent);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-desc {
  color: #9CA5AF;
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-col-title {
  color: #FFFFFF;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #9CA5AF;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: #78828C;
}

.footer-bottom a {
  color: #9CA5AF;
}

.footer-bottom a:hover {
  color: #FFFFFF;
}

/* ==========================================================================
   PAGE-SPECIFIC STYLES: About & Contact
   ========================================================================== */

/* Page Hero */
.page-hero {
  padding-block: var(--space-9) var(--space-7);
  text-align: center;
  background: linear-gradient(180deg, rgba(228, 240, 237, 0.4) 0%, rgba(248, 247, 243, 0) 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-hero-content {
  max-width: 680px;
  margin-inline: auto;
}

.page-title {
  margin-bottom: var(--space-4);
}

.page-lead {
  font-size: 1.15rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* About Page Sections */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-block: var(--space-8);
}

.value-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.value-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.process-steps-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 820px;
  margin-inline: auto;
  margin-block: var(--space-7);
}

.process-step-item {
  display: flex;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  align-items: flex-start;
}

.process-step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Contact Page Layout */
.contact-layout {
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
}

.contact-info-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 42px 48px;
  box-shadow: var(--shadow-soft);
  width: 100%;
  box-sizing: border-box;
}

.contact-card-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.contact-details-grid {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.contact-detail-box {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
}

.contact-detail-box.contact-detail-centered {
  justify-content: center;
  text-align: center;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px;
}

.contact-detail-box:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(46, 111, 104, 0.08);
}

.contact-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-detail-text {
  width: 100%;
}

.contact-detail-text h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.contact-detail-text address,
.contact-detail-text p {
  font-style: normal;
  font-size: 0.98rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin: 0;
}

.contact-email-wrap {
  margin-top: 10px;
  width: 100%;
  display: flex;
  justify-content: center;
}

.contact-email-link {
  color: var(--color-primary);
  font-weight: 700;
  font-size: clamp(1rem, 4vw, 1.22rem);
  text-decoration: none;
  transition: color 0.2s ease;
  word-break: break-word;
  overflow-wrap: anywhere;
  max-width: 100%;
  display: inline-block;
}

.contact-email-link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.contact-btn-wrap {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  width: 100%;
}

.contact-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  max-width: 100%;
  white-space: normal;
  word-break: break-word;
  text-align: center;
  line-height: 1.35;
  padding: 14px 22px;
  box-sizing: border-box;
}

.contact-action-btn .btn-text-short {
  display: none;
}

.contact-action-btn .btn-text-full {
  display: inline;
}

.contact-form-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-soft);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-background);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-ink);
  transition: all var(--transition-fast);
}

.form-control:focus {
  background-color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(46, 111, 104, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-help {
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-top: 4px;
}

.form-status-msg {
  display: none;
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 0.92rem;
}

.form-status-msg.success {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: #EBF5F0;
  border: 1px solid #3F806A;
  color: #245953;
}

/* Mobile Drawer Navigation */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 74px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(23, 32, 42, 0.4);
  z-index: 99;
  backdrop-filter: blur(4px);
}

.mobile-nav-panel {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-links a {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-ink);
  padding-block: 6px;
  display: block;
}

.mobile-nav-drawer.open {
  display: block;
}

/* ==========================================================================
   Age Card Photos & Amazon Action Buttons
   ========================================================================== */
.age-card-photo-box {
  position: relative;
  width: 100%;
  height: 165px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 16px;
  background-color: var(--color-primary-soft);
}

.age-card-photo-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
  display: block;
}

.age-card:hover .age-card-photo-box img {
  transform: scale(1.06);
}

.age-card-badge-overlay {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(23, 32, 42, 0.78);
  backdrop-filter: blur(6px);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.age-card-study-pill {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(6px);
  color: var(--color-primary-dark);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.age-card-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.btn-amazon-stage-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #FF9900 0%, #E87A00 100%);
  color: #111827 !important;
  font-size: 0.84rem;
  font-weight: 700;
  padding: 9px 14px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(232, 122, 0, 0.25);
}

.btn-amazon-stage-card:hover {
  background: linear-gradient(135deg, #FFA724 0%, #F58700 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232, 122, 0, 0.35);
  color: #000000 !important;
}

.btn-stage-guide-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-stage-guide-link:hover {
  background-color: var(--color-primary-soft);
}

/* ==========================================================================
   Stage Scientific Study Showcase & Amazon List Banners
   ========================================================================== */
.stage-showcase {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  margin-bottom: var(--space-8);
  display: grid;
  grid-template-columns: 460px 1fr;
  align-items: stretch;
  width: 100%;
}

.stage-showcase-visual {
  position: relative;
  min-height: 380px;
  overflow: hidden;
  background-color: #17202A;
}

.stage-showcase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.stage-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(23, 32, 42, 0.35) 0%, rgba(23, 32, 42, 0.1) 35%, rgba(23, 32, 42, 0.25) 55%, rgba(23, 32, 42, 0.85) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  box-sizing: border-box;
}

.stage-visual-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  width: 100%;
}

.stage-visual-top .stage-pill {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.stage-visual-bottom {
  color: #FFFFFF;
  width: 100%;
}

.stage-visual-study-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #FFD599;
  margin-bottom: 4px;
}

.stage-visual-caption {
  font-size: 0.88rem;
  color: #F3F1EC;
  line-height: 1.45;
  margin: 0;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
  word-break: normal;
  overflow-wrap: break-word;
}

.stage-showcase-content {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stage-study-header {
  margin-bottom: 16px;
}

.stage-study-kicker {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.stage-study-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-ink);
  line-height: 1.25;
  margin-bottom: 10px;
}

.stage-study-desc {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.55;
  margin-bottom: 16px;
}

.stage-milestones-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 22px;
}

.stage-milestone-item {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
}

.stage-milestone-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
}

.stage-milestone-val {
  font-size: 0.84rem;
  color: var(--color-ink);
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
}

.stage-amazon-banner-box {
  background: linear-gradient(135deg, #17202A 0%, #1E2D3D 100%);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 6px 18px rgba(23, 32, 42, 0.15);
}

.stage-amazon-banner-box .banner-text h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.stage-amazon-banner-box .banner-text p {
  color: #BAC2CC;
  font-size: 0.82rem;
  margin: 0;
}

.btn-amazon-primary-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #FF9900 0%, #FF8000 100%);
  color: #111827 !important;
  font-weight: 800;
  font-size: 0.92rem;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(255, 153, 0, 0.35);
  flex-shrink: 0;
}

.btn-amazon-primary-cta:hover {
  background: linear-gradient(135deg, #FFAA2B 0%, #FF8C00 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 153, 0, 0.45);
  color: #000000 !important;
}

/* Toast notification */
.hobby-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: #17202A;
  color: #FFFFFF;
  padding: 14px 24px;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}

.hobby-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    margin-inline: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-trust-bar {
    justify-content: center;
  }

  .hero-visual {
    margin-top: var(--space-6);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .stage-showcase {
    grid-template-columns: 360px 1fr;
  }

  .stage-showcase-content {
    padding: 26px 28px;
  }
}

@media (max-width: 768px) {
  .nav-links, .header-actions .btn-primary {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .section {
    padding-block: var(--space-8);
  }

  .stage-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .stage-pillars-bar {
    width: 100%;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .age-cards-grid {
    grid-template-columns: 1fr;
  }

  .quiz-wrapper {
    padding: 24px 18px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  /* Stage Study Showcase Responsive Layout */
  .stage-showcase {
    grid-template-columns: 1fr !important;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
    width: 100%;
    overflow: hidden;
  }

  .stage-showcase-visual {
    width: 100%;
    height: 310px;
    min-height: 280px;
    max-height: 360px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  .stage-showcase-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .stage-visual-overlay {
    padding: 16px 18px;
  }

  .stage-visual-top {
    gap: 8px;
  }

  .stage-visual-top .stage-pill {
    font-size: 0.74rem;
    padding: 4px 10px;
  }

  .stage-visual-top .badge {
    font-size: 0.72rem;
    padding: 4px 10px;
  }

  .stage-visual-study-tag {
    font-size: 0.70rem;
    margin-bottom: 4px;
  }

  .stage-visual-caption {
    font-size: 0.84rem;
    line-height: 1.4;
  }

  .stage-showcase-content {
    padding: 24px 20px;
    width: 100%;
    box-sizing: border-box;
  }

  .stage-study-title {
    font-size: 1.22rem;
    line-height: 1.3;
  }

  .stage-study-desc {
    font-size: 0.88rem;
    line-height: 1.5;
  }

  .stage-milestones-list {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-bottom: 18px;
  }

  .stage-milestone-item {
    padding: 9px 12px;
  }

  .stage-amazon-banner-box {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
    gap: 14px;
    padding: 16px 16px;
  }

  .btn-amazon-primary-cta {
    justify-content: center;
    width: 100%;
    padding: 12px 16px;
    font-size: 0.88rem;
    white-space: normal;
    text-align: center;
  }

  /* Contact Page Mobile Alignment */
  .contact-info-card {
    padding: 28px 18px;
    border-radius: var(--radius-lg);
  }

  .contact-card-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
  }

  .contact-card-header h2 {
    font-size: 1.45rem !important;
  }

  .contact-detail-box.contact-detail-centered {
    padding: 22px 14px;
  }

  .contact-action-btn {
    width: 100%;
    padding: 13px 18px;
    font-size: 0.95rem;
  }

  .contact-action-btn .btn-text-full {
    display: none;
  }

  .contact-action-btn .btn-text-short {
    display: inline;
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: 16px;
  }

  .stage-showcase {
    border-radius: var(--radius-md);
  }

  .stage-showcase-visual {
    height: 275px;
    min-height: 250px;
    max-height: 310px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
  }

  .stage-visual-overlay {
    padding: 12px 14px;
  }

  .stage-visual-top .stage-pill {
    font-size: 0.68rem;
    padding: 3px 8px;
  }

  .stage-visual-top .badge {
    font-size: 0.68rem;
    padding: 3px 8px;
  }

  .stage-visual-study-tag {
    font-size: 0.66rem;
    margin-bottom: 2px;
  }

  .stage-visual-caption {
    font-size: 0.77rem;
    line-height: 1.35;
  }

  .stage-showcase-content {
    padding: 18px 14px;
  }

  .stage-study-title {
    font-size: 1.10rem;
  }

  .stage-study-desc {
    font-size: 0.84rem;
  }

  .stage-milestone-item {
    padding: 8px 10px;
  }

  .stage-milestone-label {
    font-size: 0.72rem;
  }

  .stage-milestone-val {
    font-size: 0.78rem;
  }

  .stage-amazon-banner-box {
    padding: 14px 12px;
  }

  .stage-amazon-banner-box .banner-text h4 {
    font-size: 0.94rem;
  }

  .stage-amazon-banner-box .banner-text p {
    font-size: 0.76rem;
  }

  .btn-amazon-primary-cta {
    padding: 11px 14px;
    font-size: 0.84rem;
  }

  .contact-info-card {
    padding: 22px 14px;
  }

  .contact-detail-box.contact-detail-centered {
    padding: 18px 10px;
  }

  .contact-email-link {
    font-size: 0.98rem;
  }

  .contact-action-btn {
    padding: 12px 14px;
    font-size: 0.92rem;
    gap: 8px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}