/* ==========================================================================
   ADHDGearUp — Main Stylesheet
   Colour palette:
     Primary:    #1D9E75 (teal)
     Accent:     #BA7517 (amber)
     Background: #FAFAF8
     Text:       #1a1a1a
     Muted:      #6b6b6b
   Font: system-ui stack
   ========================================================================== */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1D9E75;
  --color-primary-dark: #177a5b;
  --color-primary-light: #e6f5ef;
  --color-accent: #BA7517;
  --color-accent-light: #fdf3e3;
  --color-bg: #FAFAF8;
  --color-text: #1a1a1a;
  --color-muted: #6b6b6b;
  --color-border: #e0e0dc;
  --color-card-bg: #ffffff;
  --color-star: #BA7517;
  --color-star-empty: #d4d4d4;
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 900px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover,
a:focus-visible {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

main {
  padding: 2rem 0 3rem;
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  top: 0.5rem;
  color: #fff;
  text-decoration: none;
}

/* ==========================================================================
   Navigation (Critical — inline candidate)
   ========================================================================== */
.site-header {
  background: var(--color-card-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
  gap: 1rem;
  position: relative;
}

/* hamburger CSS moved to end of file so it wins source order over .site-nav */
.nav-toggle { display: none; }
.nav-toggle-label { display: none; cursor: pointer; }

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.site-brand:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.site-brand img,
.site-brand svg {
  width: 28px;
  height: 28px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-muted);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.site-nav .nav-coffee {
  color: var(--color-accent);
}

.site-nav .nav-coffee:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* ==========================================================================
   Hero Section (Critical — inline candidate)
   ========================================================================== */
.hero {
  text-align: center;
  padding: 3rem 0 2.5rem;
}

.hero h1 {
  font-size: 2rem;
  line-height: 1.25;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero .hero-sub {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ==========================================================================
   Challenge Card Grid
   ========================================================================== */
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

@media (min-width: 640px) {
  .challenge-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }
}

.challenge-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  min-height: 140px;
  justify-content: center;
}

.challenge-card:hover,
.challenge-card:focus-visible {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  text-decoration: none;
}

.challenge-card .card-icon {
  font-size: 2rem;
  line-height: 1;
}

.challenge-card .card-title {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.3;
}

.challenge-card .card-subtitle {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.4;
}

/* ==========================================================================
   How It Works
   ========================================================================== */
.how-it-works {
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border);
  margin-top: 1rem;
}

.how-it-works h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 2rem;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  text-align: center;
  padding: 1.5rem 1rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.step h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.925rem;
  color: var(--color-muted);
}

/* ==========================================================================
   Latest Reviews Strip
   ========================================================================== */
.latest-reviews {
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border);
}

.latest-reviews h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.review-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .review-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   Product Cards
   ========================================================================== */
.product-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 2rem 0;
}

.product-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.product-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.product-tagline {
  color: var(--color-muted);
  font-size: 0.925rem;
  margin-bottom: 1rem;
}

.product-price {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.product-description {
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.65;
}

.product-affiliate-note {
  font-size: 0.825rem;
  color: var(--color-muted);
  font-style: italic;
  margin-bottom: 1rem;
}

/* ADHD Rating Bars */
.adhd-ratings {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 480px) {
  .adhd-ratings {
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem 1.5rem;
  }
}

.rating-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.rating-label {
  font-size: 0.8rem;
  color: var(--color-muted);
  font-weight: 500;
}

.rating-bar-track {
  width: 100%;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.rating-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 4px;
  transition: width 0.5s ease;
}

.rating-bar-fill.low {
  background: #c0392b;
}

.rating-bar-fill.mid {
  background: var(--color-accent);
}

.rating-bar-fill.high {
  background: var(--color-primary);
}

.rating-value {
  font-size: 0.75rem;
  color: var(--color-muted);
  font-weight: 600;
  text-align: right;
}

/* Amazon Button */
.btn-amazon {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-accent);
  color: #fff;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
  min-height: 44px;
}

.btn-amazon:hover,
.btn-amazon:focus-visible {
  background: #9a6012;
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}

/* ==========================================================================
   Star Ratings (SVG-based)
   ========================================================================== */
.star-display {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.star-display svg {
  width: 18px;
  height: 18px;
}

.star-filled {
  fill: var(--color-star);
}

.star-empty {
  fill: var(--color-star-empty);
}

/* Interactive Star Rating Input */
.star-rating-input {
  display: inline-flex;
  flex-direction: row-reverse;
  gap: 2px;
  align-items: center;
}

.star-rating-input input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.star-rating-input label {
  cursor: pointer;
  display: flex;
  align-items: center;
}

.star-rating-input label svg {
  width: 28px;
  height: 28px;
  fill: var(--color-star-empty);
  transition: fill var(--transition), transform var(--transition);
}

.star-rating-input label:hover svg,
.star-rating-input label:hover ~ label svg {
  fill: var(--color-star);
  transform: scale(1.1);
}

.star-rating-input input[type="radio"]:checked ~ label svg {
  fill: var(--color-star);
}

.star-rating-input input[type="radio"]:focus-visible + label svg {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ==========================================================================
   Review Cards
   ========================================================================== */
.review-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.review-card .review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.review-card .review-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.review-card .review-date {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.review-card .review-tag {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
}

.review-card .review-body {
  font-size: 0.925rem;
  line-height: 1.6;
  color: var(--color-text);
  margin-top: 0.5rem;
}

.review-cards-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.5rem 0;
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  font-size: 0.95rem;
  font-family: var(--font-stack);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 44px;
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(29, 158, 117, 0.15);
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  min-height: 44px;
  font-family: var(--font-stack);
}

.btn-submit:hover,
.btn-submit:focus-visible {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Success / Error Messages */
.message-success {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.925rem;
  margin: 1rem 0;
}

.message-error {
  background: #fdf2f2;
  color: #c0392b;
  border: 1px solid #e74c3c;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.925rem;
  margin: 1rem 0;
}

/* ==========================================================================
   Filter Bar
   ========================================================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 2rem;
  padding: 1rem 1.25rem;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.filter-bar .form-group {
  margin-bottom: 0;
  flex: 1;
  min-width: 180px;
}

/* ==========================================================================
   Breadcrumb
   ========================================================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb .separator {
  color: var(--color-border);
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

/* ==========================================================================
   Articles (Learn pages)
   ========================================================================== */
article.learn-article {
  max-width: 700px;
  margin: 0 auto;
}

article.learn-article h1 {
  font-size: 1.85rem;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

article.learn-article .article-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

article.learn-article h2 {
  font-size: 1.35rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

article.learn-article h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

article.learn-article p {
  margin-bottom: 1rem;
  font-size: 1rem;
}

article.learn-article ul,
article.learn-article ol {
  margin: 0.75rem 0 1rem 1.5rem;
}

article.learn-article li {
  margin-bottom: 0.4rem;
  line-height: 1.65;
}

article.learn-article blockquote {
  border-left: 3px solid var(--color-primary);
  margin: 1.25rem 0;
  padding: 0.75rem 1rem;
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text);
}

/* ==========================================================================
   About Page
   ========================================================================== */
.about-section {
  margin-bottom: 2.5rem;
}

.about-section h2 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.about-section p {
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.rubric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.25rem 0;
}

@media (min-width: 640px) {
  .rubric-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.rubric-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.rubric-item h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
  color: var(--color-primary-dark);
}

.rubric-item p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ==========================================================================
   Stats Page
   ========================================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0;
}

@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}

.stat-card .stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}

.stat-card .stat-label {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 0.25rem;
}

.chart-container {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.chart-container h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.stats-table th,
.stats-table td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.stats-table th {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-refresh {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-card-bg);
  color: var(--color-text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  min-height: 44px;
  font-family: var(--font-stack);
}

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

/* ==========================================================================
   404 Page
   ========================================================================== */
.page-404 {
  text-align: center;
  padding: 4rem 0;
}

.page-404 h1 {
  font-size: 4rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.page-404 p {
  font-size: 1.125rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
}

.page-404 a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  min-height: 44px;
}

.page-404 a:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

/* ==========================================================================
   Affiliate Disclosure
   ========================================================================== */
.affiliate-disclosure {
  font-size: 0.8rem;
  color: var(--color-muted);
  padding: 0.75rem 1rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0 1.5rem;
  margin-top: 3rem;
  text-align: center;
}

.footer-links {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--color-muted);
  margin: 0 0.35rem;
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-links .sep {
  color: var(--color-border);
}

.footer-stats {
  margin-top: 0.5rem;
}

.footer-stats a {
  font-size: 0.75rem;
  color: var(--color-muted);
  opacity: 0.6;
}

.footer-stats a:hover {
  opacity: 1;
  color: var(--color-primary);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.text-muted {
  color: var(--color-muted);
}

.text-center {
  text-align: center;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Related article link */
.related-article {
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--color-primary-light);
  border-radius: var(--radius);
  border: 1px solid rgba(29, 158, 117, 0.2);
}

.related-article h3 {
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.related-article a {
  font-weight: 600;
}

/* Loading spinner */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  color: var(--color-muted);
  font-size: 0.925rem;
}

.loading::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  margin-right: 0.5rem;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-muted);
}

.empty-state p {
  font-size: 0.95rem;
}

/* Challenge page intro */
.challenge-intro {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 2rem;
  max-width: 700px;
}

.challenge-intro p {
  margin-bottom: 0.75rem;
}

/* Section heading */
.section-heading {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

/* Review form section */
.review-form-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.review-form-section h2 {
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
}

/* ==========================================================================
   Responsive — Large Screens
   ========================================================================== */
@media (min-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero .hero-sub {
    font-size: 1.2rem;
  }

  main {
    padding: 2.5rem 0 4rem;
  }
}

/* ==========================================================================
   Print
   ========================================================================== */
@media print {
  .site-header,
  .site-footer,
  .btn-amazon,
  .star-rating-input,
  .filter-bar {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}

/* ==========================================================================
   Mobile hamburger nav — placed at end so its selectors win source order
   over the unscoped .site-nav { display: flex } above.
   ========================================================================== */
@media (max-width: 639px) {
  .site-header .nav-toggle-label {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 24px;
    margin-left: auto;
  }
  .site-header .nav-toggle-label span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform .2s, opacity .2s;
    pointer-events: none;
  }
  .site-header .nav-toggle:checked + .nav-toggle-label span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-header .nav-toggle:checked + .nav-toggle-label span:nth-child(2) { opacity: 0; }
  .site-header .nav-toggle:checked + .nav-toggle-label span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .site-header .site-nav {
    display: none;
    position: absolute;
    top: 3.5rem;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-card-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0.25rem 1rem 0.75rem;
    gap: 0;
    z-index: 99;
  }
  .site-header .nav-toggle:checked ~ .site-nav { display: flex; }
  .site-header .site-nav a {
    padding: 0.7rem 0.5rem;
    border-bottom: 1px solid var(--color-border);
    white-space: normal;
  }
  .site-header .site-nav a:last-child { border-bottom: none; }
}