/* ============================================================
   Jon AI Decide — Presentation Page Styles
   ============================================================ */

/* ── Navigation ── */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 1.5rem;
  transition: background var(--transition-normal), backdrop-filter var(--transition-normal), box-shadow var(--transition-normal);
}

#nav.scrolled {
  background: hsla(0, 0%, 100%, 0.92); /* Changed to a white transparent background */
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border-subtle);
}
.nav-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

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

.nav-links a {
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 0.5rem;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: hsla(220,30%,25%,0.3);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-actions .btn {
  padding: 0.55rem 1.2rem;
  font-size: 0.9rem;
}

/* hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.4rem;
  border-radius: 0.4rem;
  transition: background var(--transition-fast);
}

.nav-hamburger:hover { background: hsla(220,30%,25%,0.3); }

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: hsla(0, 0%, 100%, 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.nav-mobile-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.nav-mobile-overlay a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  transition: color var(--transition-fast);
}

.nav-mobile-overlay a:hover { color: var(--accent-blue); }

.nav-mobile-overlay .nav-actions-mobile {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 280px;
  margin-top: 1rem;
}

.nav-mobile-overlay .btn { width: 100%; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-actions .btn:not(.btn-primary) { display: none; }
}

/* ── Hero ── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  padding: 7rem 1.5rem 4rem;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  margin-bottom: 1.5rem;
}

.hero-headline {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, hsl(217,91%,80%) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: 2.5rem;
  font-size: 1.2rem;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.hero-stat-icon {
  color: var(--accent-blue);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hero-stat-label {
  font-weight: 600;
  color: var(--text-primary);
}

.hero-stat + .hero-stat {
  border-left: 1px solid var(--border-subtle);
}

/* Hero Video */
.hero-video-container {
  max-width: 960px;
  margin-inline: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  position: relative;
  box-shadow: 0 40px 100px hsla(217, 91%, 60%, 0.08);
}

.video-aspect {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  background: var(--bg-secondary);
}

.video-aspect iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: var(--bg-secondary);
  cursor: pointer;
  transition: background var(--transition-normal);
}

.video-placeholder:hover { background: var(--bg-tertiary); }

.play-btn-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse-glow 3s ease-in-out infinite;
  transition: transform var(--transition-normal);
}

.video-placeholder:hover .play-btn-circle { transform: scale(1.1); }

.play-btn-circle svg {
  width: 32px;
  height: 32px;
  color: white;
  margin-left: 4px;
}

.video-placeholder-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ── Problem Section ── */
#problem {
  background: var(--bg-secondary);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.problem-text .section-label {
  margin-bottom: 1.25rem;
}

.problem-text h2 {
  margin-bottom: 1.5rem;
}

.problem-text p {
  margin-bottom: 1rem;
}

.comparison-card {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.comparison-half {
  padding: 1.75rem;
}

.comparison-half.standard {
  background: hsla(222, 40%, 7%, 0.8);
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-half.jon {
  background: hsla(217, 91%, 60%, 0.04);
  border-top: 1px solid hsla(217, 91%, 60%, 0.15);
  position: relative;
}

.comparison-half.jon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
  border: 1px solid hsla(217, 91%, 60%, 0.2);
  pointer-events: none;
}

.comparison-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.comparison-title h4 {
  font-size: 1rem;
  font-weight: 700;
}

.comparison-title .dim { color: var(--text-muted); }
.comparison-title .bright { color: var(--accent-blue); }

.comparison-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.comparison-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.comparison-item .ci-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.ci-icon.bad  { color: var(--accent-red); }
.ci-icon.good { color: var(--accent-emerald); }

.comparison-half.standard .comparison-item { color: var(--text-muted); }
.comparison-half.jon .comparison-item      { color: var(--text-secondary); }

@media (max-width: 768px) {
  .problem-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ── How It Works ── */
#how-it-works { background: var(--bg-primary); }

.how-heading-block {
  text-align: center;
  margin-bottom: 4rem;
}

.how-heading-block .badge { margin-bottom: 1rem; }
.how-heading-block h2 { margin-bottom: 0; }

.timeline {
  position: relative;
  max-width: 780px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 32px;
  top: 50px;
  bottom: 50px;
  width: 2px;
  background: linear-gradient(to bottom,
    var(--accent-blue) 0%,
    var(--accent-purple) 50%,
    var(--accent-emerald) 100%);
  opacity: 0.3;
}

.timeline-step {
  display: flex;
  gap: 2rem;
  padding: 1.75rem 0;
  position: relative;
  z-index: 1;
}

.timeline-step:last-child { border-bottom: none; }

.step-marker {
  flex-shrink: 0;
  width: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--border-subtle);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  color: var(--accent-blue);
  flex-shrink: 0;
  transition: border-color var(--transition-normal), background var(--transition-normal);
}

.timeline-step:hover .step-number {
  border-color: var(--accent-blue);
  background: hsla(217,91%,60%,0.08);
}

.step-icon {
  width: 24px;
  height: 24px;
  color: var(--text-muted);
}

.step-body {
  flex: 1;
  padding-top: 0.5rem;
}

.step-body h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.step-body p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.step-models-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.step-model-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.step-model-badge img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  border-radius: 4px;
}

@media (max-width: 768px) {
  .timeline::before { left: 24px; }
  .step-marker { width: 48px; }
  .step-number { width: 40px; height: 40px; font-size: 0.875rem; }
  .timeline-step { gap: 1.25rem; }
}

/* ── The Models ── */
#the-models {
  background: var(--bg-secondary);
}

.models-heading { text-align: center; margin-bottom: 1rem; }
.models-sub { text-align: center; max-width: 680px; margin-inline: auto; margin-bottom: 3.5rem; }

.models-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.model-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.model-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.model-card:hover { transform: translateY(-4px); box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
.model-card:hover::before { opacity: 1; }

.model-card.gpt::before    { background: hsl(160,84%,39%); border-color: hsl(160,84%,39%); }
.model-card.gpt:hover      { border-color: hsl(160,84%,39%); }

.model-card.claude::before { background: hsl(30,90%,55%); }
.model-card.claude:hover   { border-color: hsl(30,90%,55%); }

.model-card.gemini::before { background: hsl(217,91%,60%); }
.model-card.gemini:hover   { border-color: hsl(217,91%,60%); }

.model-card.grok::before   { background: hsl(0,84%,60%); }
.model-card.grok:hover     { border-color: hsl(0,84%,60%); }

.model-logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.model-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 10px;
}

.model-name-block h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.1rem;
}

.model-name-block span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.model-specialty {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.model-card.gpt    .model-specialty { color: hsl(160,84%,39%); }
.model-card.claude .model-specialty { color: hsl(30,90%,55%); }
.model-card.gemini .model-specialty { color: hsl(217,91%,60%); }
.model-card.grok   .model-specialty { color: hsl(0,84%,60%); }

.model-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.models-callout {
  max-width: 800px;
  margin-inline: auto;
  background: hsla(217,91%,60%,0.04);
  border: 1px solid hsla(217,91%,60%,0.15);
  border-radius: var(--radius-card);
  padding: 1.5rem 2rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 2rem;
}

.google-dr-card {
  max-width: 500px;
  margin: 1.5rem auto 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: border-color var(--transition-normal);
}

.google-dr-card:hover { border-color: var(--accent-blue); }

.google-dr-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: hsla(217,91%,60%,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.google-dr-body h4 { font-size: 1rem; margin-bottom: 0.3rem; }
.google-dr-body p { font-size: 0.875rem; color: var(--text-muted); }

@media (max-width: 768px) {
  .models-grid { grid-template-columns: 1fr; }
}

/* ── Research Library ── */
#research-library { background: var(--bg-primary); }

.library-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 3rem;
}

.library-text .badge { margin-bottom: 1.25rem; }
.library-text h2 { margin-bottom: 1.5rem; }
.library-text p  { margin-bottom: 1rem; }

/* Library UI mockup */
.library-ui-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.3);
}

.library-ui-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.library-ui-header h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
}

.library-ui-header .search-icon { color: var(--accent-blue); width: 18px; height: 18px; }

.library-search {
  margin: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  padding: 0.6rem 0.875rem;
}

.library-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  width: 100%;
}

.library-folders {
  padding: 0.75rem 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.library-folder {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.875rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background var(--transition-fast);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.library-folder:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.library-folder.active {
  background: hsla(217,91%,60%,0.08);
  color: var(--accent-blue);
  border: 1px solid hsla(217,91%,60%,0.15);
}

.library-folder-icon { font-size: 1rem; }
.library-folder-count {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 0.1rem 0.4rem;
  border-radius: 9999px;
}

.library-ui-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.library-ui-footer span { font-size: 0.8rem; color: var(--text-muted); }

.library-export-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  background: var(--accent-blue);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 0.5rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.library-export-btn:hover { background: hsl(217,91%,50%); transform: translateY(-1px); }

.library-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.library-feat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.library-feat-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-4px);
}

.feat-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  background: hsla(217,91%,60%,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  margin-bottom: 1rem;
}

.library-feat-card h4 { font-size: 1rem; margin-bottom: 0.5rem; }
.library-feat-card p  { font-size: 0.875rem; }

@media (max-width: 1024px) {
  .library-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .library-features { grid-template-columns: 1fr; gap: 1rem; }
}

@media (max-width: 768px) {
  .library-features { grid-template-columns: 1fr; }
}

/* ── Screenshot ── */
#screenshot { background: var(--bg-secondary); text-align: center; }

#screenshot h2 { margin-bottom: 0.75rem; }
#screenshot p  { max-width: 600px; margin-inline: auto; margin-bottom: 3rem; }

.screenshot-frame {
  max-width: 960px;
  margin-inline: auto;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 40px 100px hsla(217,91%,60%,0.06);
}

.browser-chrome {
  padding: 0.875rem 1.25rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.browser-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.browser-dot:nth-child(1) { background: hsl(0,84%,60%); }
.browser-dot:nth-child(2) { background: hsl(38,92%,50%); }
.browser-dot:nth-child(3) { background: hsl(160,84%,39%); }

.browser-url {
  flex: 1;
  margin-left: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 0.4rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 400px;
}

.screenshot-img {
  width: 100%;
  display: block;
  max-height: 540px;
  object-fit: cover;
  object-position: top;
}

.screenshot-placeholder {
  width: 100%;
  height: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  font-size: 0.9rem;
}

.screenshot-placeholder a {
  color: var(--accent-blue);
  text-decoration: underline;
}

/* ── Pricing ── */
#pricing { background: var(--bg-primary); text-align: center; }

#pricing .badge { margin-bottom: 1.25rem; }
#pricing h2 { margin-bottom: 3.5rem; }

.pricing-card {
  max-width: 680px;
  margin-inline: auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 3rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.2);
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient-cta);
}

.pricing-label {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.pricing-amount {
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.pricing-period {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.pricing-monthly {
  font-size: 0.95rem;
  color: var(--accent-blue);
  font-weight: 600;
  margin-bottom: 2.5rem;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: left;
  margin-bottom: 2.5rem;
}

.pricing-feat {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-feat-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-emerald);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-cta { width: 100%; margin-bottom: 2rem; }

.pricing-compare {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: left;
  line-height: 1.6;
}

.pricing-compare strong { color: var(--text-secondary); }

/* ── Who It's For ── */
#who-its-for { background: var(--bg-secondary); text-align: center; }

#who-its-for .badge { margin-bottom: 1.25rem; }
#who-its-for h2 { margin-bottom: 0.75rem; }
#who-its-for .who-sub { max-width: 640px; margin-inline: auto; margin-bottom: 3.5rem; }

.who-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.who-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 1.25rem;
  padding: 1.75rem 1.25rem;
  text-align: center;
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.who-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-4px);
}

.who-card-emoji { font-size: 2.5rem; margin-bottom: 0.75rem; display: block; }
.who-card h4   { font-size: 0.95rem; margin-bottom: 0.35rem; }
.who-card p    { font-size: 0.8rem; color: var(--text-muted); }

@media (max-width: 1024px) { .who-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .who-grid { grid-template-columns: 1fr; } }

/* ── About Jon AI ── */
#about { background: var(--bg-primary); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text .badge { margin-bottom: 1.25rem; }
.about-text h2     { margin-bottom: 1.5rem; }
.about-text p      { margin-bottom: 1rem; }

.about-text a {
  color: var(--accent-blue);
  text-decoration: underline;
}

.about-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.about-badge-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 2rem;
  text-align: center;
  width: 100%;
}

.since-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: hsla(160,84%,39%,0.1);
  border: 1px solid hsla(160,84%,39%,0.25);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent-emerald);
  margin-bottom: 1rem;
}

.about-book-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
  text-decoration: none;
  transition: border-color var(--transition-normal);
}

.about-book-card:hover { border-color: var(--accent-amber); }

.book-icon {
  width: 52px;
  height: 52px;
  border-radius: 0.75rem;
  background: hsla(38,92%,50%,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  flex-shrink: 0;
}

.book-info h4 { font-size: 0.9rem; margin-bottom: 0.2rem; }
.book-info p  { font-size: 0.8rem; color: var(--text-muted); }
.book-info .book-link { font-size: 0.8rem; color: var(--accent-amber); font-weight: 600; }

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ── Final CTA ── */
#final-cta {
  background: var(--bg-secondary);
  text-align: center;
  padding: 7rem 1.5rem;
  position: relative;
}

.final-cta-content {
  max-width: 800px;
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.final-cta-content h2 { margin-bottom: 1.25rem; }
.final-cta-content p  { max-width: 560px; margin-inline: auto; margin-bottom: 2.5rem; }

/* ── Footer ── */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 1.5rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo img { height: 28px; width: auto; }

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

@media (max-width: 600px) {
  .footer-inner { flex-direction: column; text-align: center; }
}

/* ── Section heading block ── */
.section-heading-block {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-heading-block .badge { margin-bottom: 1rem; }
.section-heading-block h2    { margin-bottom: 0.75rem; }
.section-heading-block p     { max-width: 640px; margin-inline: auto; }