*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-padding-top:70px}
body{font-family:'Inter',-apple-system,sans-serif;background:#F8FAFC;color:#1A202C;line-height:1.7;overflow-x:hidden}
::selection{background:#44E9C5;color:#0F172A}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
nav{position:fixed;top:0;left:0;width:100%;z-index:1000;padding:14px 0;transition:.3s;background:rgba(255,255,255,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(0,0,0,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 24px}
.logo{font-family:'Playfair Display',serif;font-size:1.35rem;font-weight:700;color:#0F172A;text-decoration:none;line-height:1.2}
.logo span{background:linear-gradient(135deg,#44E9C5,#4EDAEB);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.logo small{font-size:.55rem;font-weight:400;color:#6B7280;display:block;font-family:'Inter',sans-serif;letter-spacing:.12em;text-transform:uppercase;margin-top:-2px;-webkit-text-fill-color:#6B7280}
.nav-links{display:flex;align-items:center;gap:24px;list-style:none}
.nav-links a{color:#475569;text-decoration:none;font-size:.85rem;font-weight:500;transition:.3s;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:linear-gradient(135deg,#44E9C5,#4EDAEB);transition:.3s}
.nav-links a:hover{color:#0F172A}
.nav-links a:hover::after{width:100%}
.nav-cta{background:linear-gradient(135deg,#44E9C5,#4EDAEB);color:#0F172A!important;font-weight:600!important;padding:10px 22px;border-radius:50px;font-size:.85rem;transition:.3s;box-shadow:0 4px 15px rgba(68,233,197,.25)}
.nav-cta:hover{transform:translateY(-2px)!important;box-shadow:0 8px 25px rgba(68,233,197,.35)!important}
.nav-cta::after{display:none!important}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.mobile-toggle span{width:26px;height:2px;background:#0F172A;border-radius:2px;transition:.3s}
.hero{min-height:90vh;display:flex;align-items:center;padding:100px 24px 60px;background:linear-gradient(135deg,rgba(68,233,197,.82),rgba(78,234,235,.82)),url('https://bestbooksalltime.com/assets/images/main-bg.webp') center/cover;position:relative;overflow:hidden}
.hero::before{content:'📖';position:absolute;font-size:180px;opacity:.06;color:#0F172A;top:8%;left:5%;transform:rotate(-12deg);z-index:0;pointer-events:none;text-shadow:120px 250px 0,280px -180px 0,-80px 400px 0,350px 150px 0,-150px -100px 0,500px -50px 0,-300px 200px 0}
.hero::after{content:'📚';position:absolute;font-size:200px;opacity:.05;color:#0F172A;bottom:5%;right:3%;transform:rotate(8deg);z-index:0;pointer-events:none;text-shadow:-200px -300px 0,280px -100px 0,-100px 200px 0,400px -150px 0}
.hero-grid{max-width:800px;margin:0 auto;width:100%;position:relative;z-index:1;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.2);backdrop-filter:blur(10px);padding:6px 16px;border-radius:50px;font-size:.75rem;color:#0F172A;font-weight:600;letter-spacing:.04em;text-transform:uppercase;margin-bottom:20px;border:1px solid rgba(255,255,255,.3);animation:fadeUp .7s ease}
.hero h1{font-family:'Playfair Display',serif;font-size:clamp(2.5rem,5vw,3.8rem);font-weight:700;line-height:1.1;margin-bottom:16px;color:#0F172A;animation:fadeUp .7s ease .1s both}
.hero h1 .hl{background:rgba(255,255,255,.3);padding:0 8px;display:inline-block;border-radius:4px}
.hero p{font-size:1.1rem;color:#334155;max-width:600px;margin:0 auto 28px;line-height:1.9;font-weight:400;animation:fadeUp .7s ease .2s both}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;animation:fadeUp .7s ease .3s both}
.btn{display:inline-flex;align-items:center;gap:8px;padding:15px 30px;border-radius:50px;font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:.4s;text-decoration:none;font-family:'Inter',sans-serif}
.btn-primary{background:#0F172A;color:#fff;box-shadow:0 4px 20px rgba(15,23,42,.15)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 35px rgba(15,23,42,.25)}
.btn-white{background:rgba(255,255,255,.9);backdrop-filter:blur(10px);color:#0F172A;border:1px solid rgba(255,255,255,.4)}
.btn-white:hover{background:#fff;transform:translateY(-3px);box-shadow:0 8px 30px rgba(0,0,0,.08)}
.section{padding:40px 0}
.section-label{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,rgba(68,233,197,.12),rgba(78,234,235,.12));padding:6px 14px;border-radius:50px;font-size:.72rem;color:#0F172A;font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px;border:1px solid rgba(68,233,197,.2)}
.section-title{font-family:'Playfair Display',serif;font-size:clamp(1.8rem,3vw,2.6rem);color:#0F172A;margin-bottom:12px;line-height:1.2;font-weight:700}
.section-sub{color:#4B5563;font-size:1rem;max-width:560px;line-height:1.8}
.text-center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}
.trust-bar{background:#fff;border-bottom:1px solid #E2E8F0;padding:22px 0}
.trust-inner{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:32px}
.trust-item{display:flex;align-items:center;gap:8px;color:#4B5563;font-size:.8rem;font-weight:500}
.trust-item .icon{font-size:1.1rem}
.trust-stars{color:#F59E0B;letter-spacing:2px;font-size:1rem}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.how-card{background:#fff;border:1px solid #E2E8F0;border-radius:20px;padding:36px 24px;text-align:center;transition:.4s;position:relative;overflow:hidden}
.how-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#44E9C5,#4EDAEB);opacity:0;transition:.5s}
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.how-card:hover::before{opacity:1}
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.how-card .icon-big{font-size:2.2rem;margin-bottom:12px;display:block}
.how-card h3{font-size:1.1rem;color:#0F172A;margin-bottom:8px}
.how-card p{color:#4B5563;font-size:.88rem;line-height:1.7}
.cat-wrapper{background:#F1F5F9;border-radius:24px;padding:40px;margin-top:40px}
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.cat-card{background:#fff;border:1px solid #E2E8F0;border-radius:14px;padding:16px 10px;text-align:center;cursor:pointer;transition:.3s;text-decoration:none;color:inherit;position:relative;overflow:hidden}
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.cat-card:hover::before{opacity:1}
.cat-card .emoji{font-size:1.5rem;display:block;margin-bottom:4px}
.cat-card .name{font-size:.75rem;font-weight:600;color:#1E293B}
.cat-card .count{font-size:.6rem;color:#6B7280;margin-top:2px;display:block}
.cat-card .hot{position:absolute;top:5px;right:5px;background:linear-gradient(135deg,#44E9C5,#4EDAEB);color:#0F172A;font-size:.48rem;font-weight:700;padding:1px 5px;border-radius:3px;text-transform:uppercase}
.quiz-hud{display:flex;align-items:center;justify-content:space-between;max-width:740px;margin:0 auto 20px;padding:0 4px}
.quiz-hud .qtitle{font-size:.8rem;font-weight:600;color:#44E9C5;text-transform:uppercase;letter-spacing:.08em}
.quiz-hud .qtitle span{color:#6B7280;font-weight:400}
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.quiz-hud .qscore .pd{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,#44E9C5,#4EDAEB);animation:pulseD 1.5s ease-in-out infinite}
@keyframes pulseD{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.7)}}
.quiz-card{background:#fff;border-radius:24px;padding:44px;max-width:740px;margin:0 auto;box-shadow:0 10px 40px rgba(0,0,0,.04);border:1px solid #E2E8F0;position:relative;overflow:hidden}
.quiz-card::before{content:'\01F4DA';position:absolute;top:-20px;right:-10px;font-size:6rem;opacity:.04;pointer-events:none;transform:rotate(15deg)}
.qbar{display:flex;gap:6px;margin-bottom:32px}
.qbar .qs{flex:1;height:6px;border-radius:10px;background:#E2E8F0;overflow:hidden;transition:.4s}
.qbar .qs .qf{height:100%;width:0%;background:linear-gradient(90deg,#44E9C5,#4EDAEB);border-radius:10px;transition:.6s ease}
.qbar .qs.done .qf{width:100%}
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@keyframes qPulse{0%,100%{opacity:1}50%{opacity:.5}}
.quiz-step{display:none}
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@keyframes gs{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}
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.quiz-step h3{font-family:'Playfair Display',serif;font-size:1.5rem;color:#0F172A;margin-bottom:6px}
.quiz-step .sd{color:#4B5563;font-size:.9rem;margin-bottom:22px}
.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}
.quiz-options.sc{grid-template-columns:1fr}
.quiz-option{padding:14px 16px;border:2px solid #E2E8F0;border-radius:14px;background:#fff;cursor:pointer;transition:.35s;text-align:center;font-weight:500;font-size:.88rem;color:#475569;position:relative;overflow:hidden}
.quiz-option::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(68,233,197,.08),rgba(78,234,235,.08));opacity:0;transition:.35s}
.quiz-option:hover{border-color:#44E9C5;color:#0F172A;transform:translateY(-2px);box-shadow:0 6px 20px rgba(68,233,197,.1)}
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.quiz-option .oe{display:block;font-size:1.4rem;margin-bottom:2px;position:relative}
.quiz-option .ob{position:absolute;top:-4px;right:-4px;background:linear-gradient(135deg,#44E9C5,#4EDAEB);color:#0F172A;font-size:.55rem;font-weight:700;padding:1px 6px;border-radius:4px;opacity:0;transition:.3s}
.quiz-option.selected .ob{opacity:1}
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.quiz-input:focus{border-color:#44E9C5;box-shadow:0 0 0 3px rgba(68,233,197,.1)}
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.quiz-nav .btn{font-size:.85rem;padding:12px 24px}
.qr{text-align:center;padding:12px;margin-top:12px;background:linear-gradient(135deg,rgba(68,233,197,.06),rgba(78,234,235,.06));border:1px dashed rgba(68,233,197,.3);border-radius:12px;font-size:.8rem;color:#0F172A;display:none}
.qr.show{display:block;animation:fadeUp .5s ease}
#results-section{padding:60px 0;display:none}
#results-section.visible{display:block;animation:gs .5s ease}
.results-header{text-align:center;margin-bottom:40px}
.results-header h2{font-family:'Playfair Display',serif;font-size:2rem;color:#0F172A;margin-bottom:6px}
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.results-header p{color:#4B5563;font-size:.95rem}
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.book-card .btag{padding:3px 10px;background:#F1F5F9;border-radius:20px;font-size:.68rem;color:#4B5563;font-weight:500}
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.book-card .br .stars{letter-spacing:2px;color:#F59E0B}
.btn-buy{display:flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;background:linear-gradient(135deg,#44E9C5,#4EDAEB);color:#0F172A;border-radius:50px;font-weight:600;font-size:.85rem;text-decoration:none;transition:.4s;margin-top:auto}
.btn-buy:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(68,233,197,.3)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px}
.stat-card{background:#fff;border:1px solid #E2E8F0;border-radius:18px;padding:30px 16px;text-align:center;transition:.4s}
.stat-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,.04)}
.stat-card .icon{font-size:1.8rem;margin-bottom:8px;display:block}
.stat-card .num{font-size:2.6rem;font-weight:800;background:linear-gradient(135deg,#44E9C5,#4EDAEB);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.stat-card .label{color:#4B5563;font-size:.82rem;margin-top:6px}
.testi-wrap{overflow:hidden;margin-top:40px;position:relative;padding:20px 0}
.testi-track{display:flex;gap:20px;animation:tscroll 45s linear infinite;width:max-content}
.testi-track:hover{animation-play-state:paused}
.testi-card{flex:0 0 340px;background:#fff;border:1px solid #E2E8F0;border-radius:18px;padding:28px;transition:.4s}
.testi-card:hover{transform:translateY(-6px);box-shadow:0 15px 40px rgba(0,0,0,.08);border-color:rgba(68,233,197,.2)}
.testi-card .stars{color:#F59E0B;font-size:.9rem;letter-spacing:3px;margin-bottom:10px}
.testi-card .text{color:#475569;font-size:.88rem;line-height:1.8;font-style:italic;margin-bottom:14px}
.testi-card .author{display:flex;align-items:center;gap:10px}
.testi-card .author .av{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#44E9C5,#4EDAEB);display:flex;align-items:center;justify-content:center;font-weight:700;color:#0F172A;font-size:.8rem;flex-shrink:0}
.testi-card .author .nm{font-weight:600;color:#1E293B;font-size:.82rem}
.testi-card .author .tl{font-size:.72rem;color:#6B7280}
@keyframes tscroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:stretch;margin-top:40px}
.about-content p{color:#475569;margin-bottom:14px;font-size:.92rem;line-height:1.9}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}
.about-feat{display:flex;align-items:center;gap:10px;color:#475569;font-size:.85rem}
.about-feat .chk{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,#44E9C5,#4EDAEB);display:flex;align-items:center;justify-content:center;font-size:.7rem;color:#0F172A;font-weight:700;flex-shrink:0}
.about-visual{display:flex;align-items:stretch}
.about-image{flex:1;border-radius:16px;background:linear-gradient(to top,rgba(68,233,197,.85) 0%,rgba(78,234,235,.5) 50%,transparent 100%) bottom/100% 30% no-repeat,url('https://bestbooksalltime.com/assets/images/about.webp') center/cover;box-shadow:0 8px 30px rgba(0,0,0,.08);transition:.4s;min-height:300px}
.about-image:hover{transform:scale(1.02);box-shadow:0 12px 40px rgba(0,0,0,.12)}
.trust-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;margin-top:40px}
.trust-card{background:#fff;border:1px solid #E2E8F0;border-radius:18px;padding:28px 20px;text-align:center;transition:.4s}
.trust-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,.04)}
.trust-card .icon{font-size:2rem;margin-bottom:10px;display:block}
.trust-card h4{color:#0F172A;font-size:.95rem;margin-bottom:4px}
.trust-card p{color:#4B5563;font-size:.82rem;line-height:1.7}
.faq-list{max-width:740px;margin:40px auto 0}
.faq-item{border-bottom:1px solid #E2E8F0;padding:18px 0}
.faq-q{display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:600;color:#0F172A;font-size:.95rem;transition:.3s}
.faq-q:hover{color:#44E9C5}
.faq-q .arrow{font-size:1rem;transition:.3s;color:#6B7280}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);color:#44E9C5}
.faq-a{max-height:0;overflow:hidden;transition:.4s ease;color:#4B5563;font-size:.88rem;line-height:1.8}
.faq-item.open .faq-a{max-height:400px;padding-top:12px}
.cs{background:#fff;border-top:1px solid #E2E8F0;padding:40px 0;content-visibility:auto;contain-intrinsic-size:1px 5000px}
.cs .reveal{opacity:1;transform:translateY(0)}
.cs .container{max-width:800px}
.cs h2{font-family:'Playfair Display',serif;font-size:1.7rem;color:#0F172A;margin:40px 0 14px;line-height:1.3}
.cs h2:first-child{margin-top:0}
.cs h3{font-family:'Playfair Display',serif;font-size:1.2rem;color:#1E293B;margin:28px 0 10px}
.cs p{margin-bottom:16px;font-size:.95rem;line-height:1.9;color:#475569}
.cta-section{background:linear-gradient(135deg,rgba(68,233,197,.08),rgba(78,234,235,.08));border:1px solid rgba(68,233,197,.15);border-radius:28px;padding:60px 40px;text-align:center;margin:60px 0;position:relative}
.cta-section h2{font-family:'Playfair Display',serif;font-size:2rem;color:#0F172A;margin-bottom:10px}
.cta-section p{color:#4B5563;max-width:500px;margin:0 auto 24px;font-size:.95rem}
footer{background:#0F172A;padding:40px 0;text-align:center;content-visibility:auto;contain-intrinsic-size:1px 200px}
footer .logo{font-family:'Playfair Display',serif;font-size:1.35rem;font-weight:700;color:#fff;text-decoration:none;line-height:1.2;display:inline-block;margin-bottom:10px}
footer .logo span{background:linear-gradient(135deg,#44E9C5,#4EDAEB);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
footer .fd{width:40px;height:2px;background:linear-gradient(90deg,#44E9C5,#4EDAEB);margin:14px auto;border-radius:2px}
.loading{text-align:center;padding:50px 20px}
.gspinner{width:60px;height:60px;position:relative;margin:0 auto 20px}
.gspinner .ring{position:absolute;inset:0;border-radius:50%;border:4px solid transparent;animation:gss 1.2s linear infinite}
.gspinner .ring:nth-child(1){border-top-color:#44E9C5;animation-delay:0s}
.gspinner .ring:nth-child(2){inset:6px;border-right-color:#4EDAEB;animation-delay:-.4s;animation-direction:reverse}
.gspinner .ring:nth-child(3){inset:12px;border-bottom-color:#44E9C5;animation-delay:-.8s}
@keyframes gss{to{transform:rotate(360deg)}}
.loading p{color:#4B5563;font-size:.9rem}
.loading .lt{margin-top:12px;font-size:.78rem;color:#6B7280;animation:fadeUp 1s ease}
.toast{position:fixed;bottom:24px;right:24px;padding:14px 22px;border-radius:14px;font-size:.85rem;font-weight:500;background:#fff;border:1px solid #E2E8F0;color:#0F172A;box-shadow:0 10px 40px rgba(0,0,0,.08);transform:translateY(120px);opacity:0;transition:.4s;z-index:9999;max-width:380px}
.toast.show{transform:translateY(0);opacity:1}
@keyframes fadeUp{from{opacity:0;transform:translateY(25px)}to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(35px);transition:all .7s cubic-bezier(.4,0,.2,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
*:focus-visible{outline:2px solid #44E9C5;outline-offset:2px}
.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}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
@media(max-width:1024px){
  .about-visual{display:none}
  .about-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-links{display:none}
  .mobile-toggle{display:flex}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;width:100%;background:#fff;padding:20px 24px;border-bottom:1px solid #E2E8F0;gap:12px;box-shadow:0 10px 30px rgba(0,0,0,.06)}
  .how-grid,.about-features{grid-template-columns:1fr}
  .quiz-card{padding:28px 18px}
  .quiz-options{grid-template-columns:1fr}
  .hero h1{font-size:2rem}
  .section{padding:30px 0}
  .stats-grid{grid-template-columns:1fr 1fr;gap:12px}
  .stats-grid .stat-card .num{font-size:2rem}
  .cta-section{padding:40px 20px;margin:30px 0}
  .cta-section h2{font-size:1.4rem}
  .books-grid,.about-features{grid-template-columns:1fr}
  .cat-wrapper{padding:20px}
  .cat-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}
}
@media(max-width:480px){
  .hero{padding:80px 16px 40px;min-height:auto}
  .hero h1{font-size:1.6rem}
  .cat-grid{grid-template-columns:repeat(3,1fr);gap:6px}
  .cat-card{padding:10px 6px}
  .cat-card .emoji{font-size:1.1rem}
  .cat-card .name{font-size:.65rem}
}