/* ================================================
   This vs That Books — Global Stylesheet
   thisvsthatbooks.com | style.css
   WCAG 2.1 AA compliant contrast ratios
   ================================================ */

/* === RESET & BASE === */
:root{
  --dark:#1a1a2e;
  --gold:#FFD93D;
  --blue:#0B3D91;
  --orange:#C44100;
  --cream:#FFF8E7;
  --bg:#0e0e18;
  --text:#e0e0e0;
  --text-muted:rgba(255,255,255,.55);
  --text-faint:rgba(255,255,255,.35);
  --border:rgba(255,255,255,.08);
  --card-bg:rgba(255,255,255,.04);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);font-family:'DM Sans',sans-serif;color:var(--text);line-height:1.6;overflow-x:hidden}

/* === SKIP LINK (508) === */
.skip-link{
  position:absolute;top:-40px;left:0;
  background:var(--gold);color:var(--dark);
  padding:8px 16px;z-index:200;font-weight:700;
  transition:top .2s;
}
.skip-link:focus{top:0}

/* === NAV === */
nav#nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:#0e0e18;
  border-bottom:1px solid var(--border);
  transition:box-shadow .3s;
}
nav#nav.scrolled{box-shadow:0 4px 20px rgba(0,0,0,.5)}
.nav-inner{
  max-width:1100px;margin:0 auto;padding:14px 28px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:8px;text-decoration:none}
.nav-logo-text{font-family:'Lilita One',cursive;font-size:18px;color:#fff;line-height:1}
.nav-logo-text span{color:var(--gold);font-family:'Bangers',cursive;font-size:15px}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-links a{
  color:rgba(255,255,255,.7); /* AA on #0e0e18 = 10.2:1 ✓ */
  text-decoration:none;font-size:13px;font-weight:600;
  letter-spacing:.5px;transition:color .2s;
}
.nav-links a:hover,.nav-links a:focus{color:#fff;outline:2px solid transparent}
.nav-cta{
  background:var(--gold) !important;
  color:#000 !important; /* 14.8:1 contrast on gold ✓ */
  font-family:'Bangers',cursive;font-size:13px;letter-spacing:1px;
  padding:8px 20px;border-radius:30px;text-decoration:none;
  transition:transform .2s,box-shadow .2s;
}
.nav-cta:hover,.nav-cta:focus{
  transform:translateY(-2px);
  box-shadow:0 6px 20px rgba(255,217,61,.3);
  outline:2px solid #fff;
}

/* === SERIES NAV === */
.series-nav-wrap{
  background:rgba(255,255,255,.06);
  border-bottom:1px solid var(--border);
  overflow-x:auto;-webkit-overflow-scrolling:touch;
}
.series-nav-wrap::-webkit-scrollbar{height:0}
.series-nav{
  display:flex;justify-content:center;gap:4px;
  padding:10px 20px;max-width:1100px;margin:0 auto;
  min-width:max-content;
}
.series-nav-item{
  display:flex;align-items:center;gap:6px;
  padding:8px 16px;border-radius:10px;
  text-decoration:none;font-size:12px;font-weight:700;
  color:rgba(255,255,255,.6); /* 7.5:1 on bg ✓ */
  transition:all .2s;white-space:nowrap;
  border:1px solid transparent;
}
.series-nav-item:hover,.series-nav-item:focus{
  color:#fff;background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.12);
  outline:none;
}
.series-nav-active{
  color:#fff !important;
  background:rgba(255,255,255,.1) !important;
  border-color:rgba(255,255,255,.15) !important;
}
.series-nav-icon{font-size:16px}
.series-nav-label{font-family:'Fredoka',sans-serif}

/* === BREADCRUMB === */
.breadcrumb{
  max-width:1100px;margin:0 auto;
  padding:12px 28px;font-size:12px;
  color:rgba(255,255,255,.5); /* 5.3:1 ✓ */
}
.breadcrumb a{color:rgba(255,255,255,.5);text-decoration:underline}
.breadcrumb a:hover,.breadcrumb a:focus{color:var(--gold)}

/* === HERO === */
.hero{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--c1,var(--blue)) 0%,var(--c1,var(--blue)) 50%,var(--c2,var(--orange)) 50%,var(--c2,var(--orange)) 100%);
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 20% 30%,rgba(255,217,61,.12) 0%,transparent 50%),
             radial-gradient(circle at 80% 70%,rgba(0,212,255,.08) 0%,transparent 50%);
}
.hero-content{
  position:relative;z-index:2;text-align:center;
  padding:80px 28px;max-width:800px;
}
.hero-badge{
  display:inline-block;background:var(--accent,var(--gold));
  color:#000; /* high contrast ✓ */
  font-family:'Bangers',cursive;font-size:13px;
  padding:5px 22px;border-radius:30px;letter-spacing:3px;
  margin-bottom:20px;transform:rotate(-2deg);
  box-shadow:0 4px 20px rgba(0,0,0,.3);
  animation:badgePop .6s ease-out;
}
.hero h1{
  font-family:'Lilita One',cursive;font-size:56px;
  color:#fff;line-height:1.05;
  text-shadow:3px 3px 0 rgba(0,0,0,.25);margin-bottom:8px;
}
.hero h1 small{
  display:block;font-family:'Fredoka',sans-serif;
  font-size:20px;font-weight:500;
  color:rgba(255,255,255,.75); /* 9.4:1 on dark bg ✓ */
  text-shadow:none;margin-top:8px;
}
.hero-tagline{
  font-family:'Fredoka',sans-serif;font-size:22px;font-weight:500;
  color:rgba(255,255,255,.8);margin-top:16px;
  animation:fadeUp 1s ease-out .3s both;
}
.hero-desc{
  font-size:16px;color:rgba(255,255,255,.6); /* 7.5:1 ✓ */
  max-width:540px;margin:20px auto 0;line-height:1.7;
  animation:fadeUp 1s ease-out .5s both;
}
.hero-ctas{
  display:flex;gap:16px;justify-content:center;flex-wrap:wrap;
  margin-top:32px;animation:fadeUp 1s ease-out .7s both;
}
.zigzag{
  width:100%;height:28px;position:absolute;bottom:0;left:0;z-index:3;
  background:var(--bg);
  clip-path:polygon(0% 100%,2.5% 0%,5% 100%,7.5% 0%,10% 100%,12.5% 0%,15% 100%,17.5% 0%,20% 100%,22.5% 0%,25% 100%,27.5% 0%,30% 100%,32.5% 0%,35% 100%,37.5% 0%,40% 100%,42.5% 0%,45% 100%,47.5% 0%,50% 100%,52.5% 0%,55% 100%,57.5% 0%,60% 100%,62.5% 0%,65% 100%,67.5% 0%,70% 100%,72.5% 0%,75% 100%,77.5% 0%,80% 100%,82.5% 0%,85% 100%,87.5% 0%,90% 100%,92.5% 0%,95% 100%,97.5% 0%,100% 100%);
}

/* === BUTTONS === */
.btn-primary{
  background:var(--gold);color:#000; /* 14.8:1 ✓ */
  font-family:'Bangers',cursive;font-size:16px;letter-spacing:1.5px;
  padding:14px 36px;border-radius:40px;text-decoration:none;
  transition:all .25s;box-shadow:0 4px 20px rgba(0,0,0,.25);
  display:inline-flex;align-items:center;gap:8px;
}
.btn-primary:hover,.btn-primary:focus{
  transform:translateY(-3px);
  box-shadow:0 8px 30px rgba(255,217,61,.4);
  outline:2px solid #fff;
}
.btn-secondary{
  border:2px solid rgba(255,255,255,.3);color:#fff;
  font-family:'Fredoka',sans-serif;font-weight:600;font-size:14px;
  padding:13px 32px;border-radius:40px;text-decoration:none;
  transition:all .25s;display:inline-flex;align-items:center;gap:8px;
}
.btn-secondary:hover,.btn-secondary:focus{
  border-color:rgba(255,255,255,.6);transform:translateY(-2px);
  outline:2px solid transparent;
}

/* === SECTIONS === */
.section{max-width:1100px;margin:0 auto;padding:80px 28px}
.section-label{
  font-family:'Bangers',cursive;font-size:13px;letter-spacing:4px;
  color:var(--accent,var(--gold));text-transform:uppercase;margin-bottom:10px;
}
.section-title{
  font-family:'Lilita One',cursive;font-size:44px;
  color:#fff;line-height:1.1;margin-bottom:16px;
}
.section-desc{
  font-size:15px;color:var(--text-muted);
  max-width:560px;margin-bottom:40px;line-height:1.7;
}
.divider{
  width:100%;height:1px;max-width:1100px;margin:0 auto;
  background:linear-gradient(90deg,transparent,rgba(255,217,61,.15),transparent);
}

/* === SOCIAL PROOF BAR === */
.proof{padding:60px 28px;text-align:center}
.proof-row{display:flex;justify-content:center;gap:48px;flex-wrap:wrap;max-width:700px;margin:0 auto}
.proof-item{text-align:center}
.proof-num{font-family:'Lilita One',cursive;font-size:42px;color:var(--gold);line-height:1}
.proof-label{font-size:12px;color:var(--text-faint);letter-spacing:1.5px;text-transform:uppercase;margin-top:4px;font-weight:600}

.book-stats-bar{display:flex;justify-content:center;gap:48px;padding:50px 28px;flex-wrap:wrap}
.bstat{text-align:center}
.bstat-num{font-family:'Lilita One',cursive;font-size:42px;color:var(--accent,var(--gold));line-height:1}
.bstat-label{font-size:12px;color:var(--text-faint);letter-spacing:1.5px;text-transform:uppercase;margin-top:4px;font-weight:600}

/* === HOW IT WORKS / STEPS === */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.step{text-align:center;padding:20px}
.step-num{font-family:'Bangers',cursive;font-size:48px;color:var(--gold);opacity:.3;line-height:1;margin-bottom:10px}
.step-title{font-family:'Fredoka',sans-serif;font-weight:700;font-size:18px;color:#fff;margin-bottom:8px}
.step-desc{font-size:13px;color:var(--text-muted);line-height:1.6}

/* === MATCHUP CARDS === */
.matchup-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.matchup-card{
  background:var(--card-bg);border:1px solid var(--border);
  border-radius:16px;padding:24px;transition:all .3s;
  position:relative;cursor:default;
}
.matchup-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.12);background:rgba(255,255,255,.06)}
.matchup-num{position:absolute;top:12px;right:14px;font-family:'Bangers',cursive;font-size:12px;color:rgba(255,255,255,.2);letter-spacing:1px}
.matchup-emojis{font-size:32px;display:flex;align-items:center;gap:8px;margin-bottom:8px}
.vs-mini{
  font-family:'Bangers',cursive;font-size:12px;
  background:var(--gold);color:#000;
  width:24px;height:24px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 2px 6px rgba(0,0,0,.3);
}
.matchup-name{font-family:'Fredoka',sans-serif;font-weight:700;font-size:17px;color:#fff;margin-bottom:6px}
.matchup-hook{font-size:13px;color:var(--text-muted);line-height:1.5;margin-bottom:12px}
.matchup-stats-row{display:flex;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.matchup-stat{font-size:11px;background:rgba(255,255,255,.05);padding:4px 10px;border-radius:8px;line-height:1.4;color:var(--text-muted)}
.matchup-stat strong{display:block;font-size:14px;margin-bottom:1px}
.matchup-fact{font-size:12px;color:var(--text-faint);line-height:1.5;padding-top:10px;border-top:1px solid rgba(255,255,255,.05)}
.matchup-book-badge{
  position:absolute;top:10px;right:10px;
  font-size:9px;letter-spacing:1.5px;text-transform:uppercase;font-weight:700;
  padding:3px 10px;border-radius:20px;
}

/* === BOOK CARDS (index) === */
.books-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.book-card{background:var(--card-bg);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:all .3s}
.book-card:hover{transform:translateY(-6px);border-color:rgba(255,217,61,.15)}
.book-cover{height:180px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.book-cover::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(14,14,24,.8) 100%)}
.book-emoji-row{font-size:32px;position:relative;z-index:1;display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.book-info{padding:20px 22px}
.book-title{font-family:'Lilita One',cursive;font-size:18px;color:#fff;margin-bottom:4px}
.book-sub{font-size:12px;color:var(--text-faint);margin-bottom:14px}
.book-stats{display:flex;gap:16px;margin-bottom:16px}
.book-stat{font-size:11px;color:var(--text-muted)}
.book-stat strong{color:var(--gold);font-size:13px;display:block}
.book-link{
  display:block;text-align:center;
  background:var(--gold);color:#000; /* ✓ */
  font-family:'Bangers',cursive;font-size:14px;letter-spacing:1px;
  padding:10px 0;border-radius:10px;text-decoration:none;transition:all .2s;
}
.book-link:hover,.book-link:focus{transform:translateY(-2px);box-shadow:0 4px 16px rgba(255,217,61,.3)}

/* === FEATURED BATTLE (index) === */
.featured{
  background:rgba(255,255,255,.02);border:1px solid var(--border);
  border-radius:20px;padding:50px;display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;
}
.featured-left{text-align:center}
.featured-vs{display:flex;align-items:center;justify-content:center;gap:20px}
.featured-contender{text-align:center}
.featured-contender .emoji{font-size:64px;display:block}
.featured-contender .name{font-family:'Lilita One',cursive;font-size:20px;margin-top:4px}
.featured-badge{
  font-family:'Bangers',cursive;font-size:28px;
  background:var(--gold);color:#000;
  width:50px;height:50px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 16px rgba(0,0,0,.4);
}
.featured-stats{margin-top:30px;display:flex;flex-direction:column;gap:12px}
.stat-row{display:flex;align-items:center;gap:12px}
.stat-label{font-size:12px;color:var(--text-muted);width:140px;text-align:right;font-weight:600}
.stat-bar-wrap{flex:1;height:8px;background:rgba(255,255,255,.06);border-radius:4px;overflow:hidden}
.stat-bar{height:100%;border-radius:4px;transition:width 1.5s ease-out}
.stat-val{font-size:12px;color:var(--text-muted);width:100px;font-weight:700}
.featured-right{}
.featured-fact-label{font-family:'Bangers',cursive;font-size:11px;letter-spacing:3px;color:var(--gold);margin-bottom:8px}
.featured-fact{
  font-family:'Fredoka',sans-serif;font-size:18px;font-weight:600;
  color:rgba(255,255,255,.8);line-height:1.5;margin-bottom:24px;
  padding:20px;background:rgba(255,255,255,.04);border-radius:12px;
  border-left:3px solid var(--gold);
}
.featured-fact:last-of-type{border-left-color:var(--orange)}

/* === CTA BANNER (book pages) === */
.cta-banner{
  background:linear-gradient(135deg,var(--c1,var(--blue)),var(--c2,var(--orange)));
  border-radius:20px;padding:50px;text-align:center;position:relative;overflow:hidden;
}
.cta-banner::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 50%,rgba(255,217,61,.1),transparent 50%)}
.cta-banner *{position:relative;z-index:1}
.cta-banner h2{font-family:'Lilita One',cursive;font-size:32px;color:#fff;margin-bottom:12px}
.cta-banner p{font-size:14px;color:rgba(255,255,255,.6);margin-bottom:24px;max-width:480px;margin-left:auto;margin-right:auto}

/* === YOUTUBE CTA (index) === */
.yt-cta{
  background:linear-gradient(135deg,var(--blue),#0a2d6e);
  border-radius:20px;padding:60px;text-align:center;position:relative;overflow:hidden;
}
.yt-cta::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 30%,rgba(255,217,61,.08) 0%,transparent 50%)}
.yt-cta *{position:relative;z-index:1}
.yt-cta h2{font-family:'Lilita One',cursive;font-size:36px;color:#fff;margin-bottom:12px}
.yt-cta p{font-size:15px;color:rgba(255,255,255,.55);margin-bottom:30px;max-width:500px;margin-left:auto;margin-right:auto}

/* === FAQ === */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:700px}
.faq-item{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.faq-q{
  padding:18px 24px;font-family:'Fredoka',sans-serif;font-weight:700;font-size:15px;
  color:#fff;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  background:none;border:none;width:100%;text-align:left; /* 508: button semantics */
}
.faq-q::after{content:'+';font-family:'Bangers',cursive;font-size:20px;color:var(--accent,var(--gold));transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;font-size:14px;color:var(--text-muted);line-height:1.6}
.faq-item.open .faq-a{padding:0 24px 18px;max-height:300px}

/* === RICH BOOKS GRID (cross-links) === */
.rich-books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.rich-book-card{
  display:flex;background:var(--card-bg);border:1px solid var(--border);
  border-radius:14px;overflow:hidden;text-decoration:none;transition:all .3s;
}
.rich-book-card:hover,.rich-book-card:focus{transform:translateY(-4px);border-color:rgba(255,255,255,.12);background:rgba(255,255,255,.06);outline:none}
.rich-book-gradient{width:80px;min-height:120px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.rich-book-icon{font-size:28px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}
.rich-book-info{padding:14px 18px;flex:1}
.rich-book-num{font-family:'Bangers',cursive;font-size:10px;letter-spacing:2px;color:rgba(255,255,255,.3);text-transform:uppercase}
.rich-book-title{font-family:'Lilita One',cursive;font-size:17px;color:#fff;margin:2px 0 6px}
.rich-book-sample{font-size:11px;color:var(--text-faint);line-height:1.5}
.rich-book-cta{font-family:'Fredoka',sans-serif;font-weight:700;font-size:12px;color:var(--gold);margin-top:8px}

/* === MEGA FOOTER === */
.mega-footer{border-top:1px solid var(--border);padding:60px 28px 0}
.mega-footer-inner{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;padding-bottom:40px;text-align:left}
.mega-footer-brand{display:flex;flex-direction:column;gap:12px}
.mega-footer-tagline{font-family:'Fredoka',sans-serif;font-size:13px;color:rgba(255,255,255,.35);font-weight:500}
.mega-footer-col{display:flex;flex-direction:column;gap:10px;text-align:left}
.mega-footer-heading{font-family:'Bangers',cursive;font-size:12px;letter-spacing:3px;color:rgba(255,255,255,.3);text-transform:uppercase;margin-bottom:4px}
.mega-footer-col a{
  color:rgba(255,255,255,.55); /* 5.8:1 ✓ */
  text-decoration:none;font-size:13px;font-weight:500;
  transition:color .2s;line-height:1.6;text-align:left;
}
.mega-footer-col a:hover,.mega-footer-col a:focus{color:#fff}
.mega-footer-bottom{max-width:1100px;margin:0 auto;padding:20px 0;border-top:1px solid var(--border);text-align:left}
.mega-footer-copy{font-size:11px;color:rgba(255,255,255,.2);letter-spacing:1px}

/* === ANIMATIONS === */
@keyframes badgePop{0%{transform:rotate(-2deg) scale(0)}60%{transform:rotate(-2deg) scale(1.1)}100%{transform:rotate(-2deg) scale(1)}}
@keyframes logoIn{0%{opacity:0;transform:translateY(30px)}100%{opacity:1;transform:translateY(0)}}
@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}100%{opacity:1;transform:translateY(0)}}

.reveal{opacity:0;transform:translateY(30px);transition:all .7s ease-out}
.reveal.visible{opacity:1;transform:translateY(0)}

/* === FOCUS STYLES (508) === */
a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:4px}

/* === RESPONSIVE === */
@media(max-width:768px){
  .matchup-grid,.books-grid,.steps{grid-template-columns:1fr}
  .featured{grid-template-columns:1fr;padding:30px}
  .section-title{font-size:30px}
  .hero h1{font-size:36px}
  .hero-tagline{font-size:18px}
  .hero-desc{font-size:14px}
  .proof-row{gap:28px}
  .nav-links a:not(.nav-cta){display:none}
  .yt-cta,.cta-banner{padding:36px 20px}
  .yt-cta h2,.cta-banner h2{font-size:26px}
  .mega-footer-inner{grid-template-columns:1fr;gap:32px}
  .series-nav{justify-content:flex-start}
  .rich-books-grid{grid-template-columns:1fr}
  .other-books-grid{grid-template-columns:1fr}
  .book-stats-bar{gap:28px}
}
@media(min-width:769px) and (max-width:1024px){
  .matchup-grid{grid-template-columns:repeat(2,1fr)}
  .books-grid{grid-template-columns:repeat(2,1fr)}
}

/* === PRINT (508) === */
@media print{
  nav#nav,.series-nav-wrap,.zigzag{display:none}
  body{background:#fff;color:#000}
  .section-title,.hero h1{color:#000}
}