:root {
    /* ── New Palette ── */
    --cyan:      #4394AD;   /* primary accent  */
    --sky:       #3A85A0;   /* mid tone        */
    --deep:      #487799;   /* deep blue       */
    --aqua:      #8ED1C8;   /* soft aqua       */
    --navy:      #2C4F6B;   /* dark accent     */
    --navy2:     #1E3A52;   /* footer deep     */
    --white:     #FFFFFF;
    --soft-bg:   #F4FAFB;   /* very light teal-white */
    --soft-bg2:  #EBF6F8;
    --border:    #C8E8EF;   /* soft teal border */
    --text-dark: #1A2E3B;
    --text-sec:  #4F6E7A;
    --grad:      linear-gradient(135deg, #8ED1C8, #4394AD, #487799);
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    font-family:'Poppins',sans-serif;
    background: var(--white);
    color: var(--text-dark);
    overflow-x: hidden;
  }

  /* ── Navbar ── */
  #navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,0.74);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .3s, background .3s;
    padding: 0 2rem;
  }
  #navbar.scrolled {
    background: rgba(255,255,255,0.94);
    box-shadow: 0 4px 32px rgba(67,148,173,0.13);
  }
  .nav-inner {
    max-width: 1200px; margin: auto;
    display: flex; align-items: center; justify-content: space-between;
    height: 68px;
  }
  .logo{
    display:flex;
    align-items:center;
  }

  .logo a{
      display:flex;
      align-items:center;
      text-decoration:none;
  }

  .logo img{
      height:240px;
      width:auto;
      object-fit:contain;
      transition:.3s;
  }

  .logo img:hover{
      transform:scale(1.03);
  }
  .nav-links { display: flex; gap: 2rem; list-style: none; }
  .nav-links a {
    font-size: .88rem; font-weight: 500; color: var(--text-sec);
    text-decoration: none; transition: color .2s;
  }
  .nav-links a:hover { color: var(--deep); }
  .btn-cta {
    background: linear-gradient(135deg, #4394AD, #487799);
    color: #fff; font-size: .88rem; font-weight: 600;
    padding: .55rem 1.4rem; border-radius: 50px; border: none;
    cursor: pointer; transition: transform .2s, box-shadow .2s;
    box-shadow: 0 4px 16px rgba(67,148,173,.38);
    text-decoration: none;
  }
  .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(67,148,173,.48); }
  #hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
  #hamburger span { display: block; width: 24px; height: 2px; background: var(--deep); border-radius: 2px; }
  #mobile-menu {
    display: none; position: fixed; top: 68px; left: 0; right: 0;
    background: rgba(255,255,255,0.97); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border); z-index: 99;
    padding: 1.5rem 2rem; flex-direction: column; gap: 1rem;
  }
  #mobile-menu a { color: var(--text-dark); text-decoration: none; font-weight: 500; }
  #mobile-menu .btn-cta { width: fit-content; margin-top: .5rem; }

  /* ── Hero ── */
  #hero {
    min-height: 100vh; padding-top: 68px;
    background: linear-gradient(160deg, #F4FAFB 0%, #EBF6F8 50%, #C8E8EF 100%);
    position: relative; overflow: hidden;
    display: flex; align-items: center;
  }
  .grid-bg {
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(67,148,173,.07) 1px, transparent 1px),
      linear-gradient(90deg, rgba(67,148,173,.07) 1px, transparent 1px);
    background-size: 48px 48px;
  }
  .blur-orb {
    position: absolute; border-radius: 50%;
    filter: blur(80px); pointer-events: none;
  }
  .orb1 { width: 520px; height: 520px; background: rgba(142,209,200,.35); top:-180px; right:-100px; }
  .orb2 { width: 380px; height: 380px; background: rgba(67,148,173,.16); bottom:-80px; left:-80px; }
  .orb3 { width: 200px; height: 200px; background: rgba(72,119,153,.2); top:60%; right:15%; }

  .hero-inner {
    max-width: 1200px; margin: auto; width: 100%;
    padding: 5rem 2rem 4rem;
    display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
    position: relative; z-index: 1;
  }
  .hero-tag {
    display: inline-flex; align-items: center; gap: .5rem;
    background: rgba(67,148,173,.1); border: 1px solid rgba(67,148,173,.28);
    color: var(--deep); font-size: .78rem; font-weight: 600; letter-spacing: .06em;
    padding: .4rem 1rem; border-radius: 50px; margin-bottom: 1.5rem;
    text-transform: uppercase;
  }
  .hero-tag span { width:6px;height:6px;border-radius:50%;background:var(--cyan);display:block;animation:pulse 2s infinite; }
  @keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(1.4)} }

  .hero-h1 {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(2.1rem, 4vw, 3.2rem);
    line-height: 1.18; color: var(--text-dark); margin-bottom: 1.2rem;
    animation: fadeUp .8s ease both;
  }
  .hero-h1 em { font-style: italic; color: var(--deep); }
  .hero-sub {
    font-size: 1rem; line-height: 1.75; color: var(--text-sec); margin-bottom: 2rem;
    animation: fadeUp .8s .15s ease both;
  }
  .hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; animation: fadeUp .8s .3s ease both; }
  .btn-outline {
    color: var(--deep); font-size: .9rem; font-weight: 600;
    padding: .65rem 1.6rem; border-radius: 50px;
    border: 1.5px solid var(--cyan); background: transparent;
    cursor: pointer; transition: all .2s; text-decoration: none; display: inline-block;
  }
  .btn-outline:hover { background: rgba(67,148,173,.08); transform: translateY(-2px); }
  .btn-primary {
    background: linear-gradient(135deg, #4394AD, #487799);
    color: #fff; font-size: .9rem; font-weight: 600;
    padding: .65rem 1.6rem; border-radius: 50px; border: none;
    cursor: pointer; transition: all .2s; text-decoration: none; display: inline-block;
    box-shadow: 0 6px 20px rgba(67,148,173,.4);
  }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(67,148,173,.52); }

  /* Hero Visual */
  .hero-visual { position: relative; animation: fadeUp .9s .2s ease both; }
  .hero-book-stack { position: relative; width: 100%; max-width: 420px; margin: auto; }
  .book-main {
    width: 100%; aspect-ratio: 3/4;
    background: linear-gradient(145deg, #2C4F6B 0%, #487799 55%, #4394AD 100%);
    border-radius: 16px;
    box-shadow: 0 32px 80px rgba(44,79,107,.32), 0 8px 24px rgba(67,148,173,.22);
    position: relative; overflow: hidden;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .8rem;
  }
  .book-main::before {
    content:''; position:absolute; inset:0;
    background: linear-gradient(135deg, rgba(142,209,200,.18) 0%, transparent 60%);
  }
  .book-main::after {
    content:''; position:absolute; left:0;top:0;bottom:0;width:14px;
    background: linear-gradient(90deg, rgba(0,0,0,.22), transparent);
    border-radius: 16px 0 0 16px;
  }
  .book-icon { font-size: 3.5rem; filter: drop-shadow(0 4px 8px rgba(0,0,0,.2)); }
  .book-label { font-family: 'DM Serif Display',serif; font-size: 1.4rem; color: rgba(255,255,255,.92); text-align: center; padding: 0 1.5rem; }
  .book-sub-label { font-size: .78rem; color: rgba(142,209,200,.85); letter-spacing: .08em; text-transform: uppercase; }
  .book-float {
    position: absolute; border-radius: 12px; overflow: hidden;
    box-shadow: 0 12px 36px rgba(44,79,107,.2);
  }
  .book-float-1 {
    width: 38%; top: 8%; right: -12%;
    background: linear-gradient(145deg, #4394AD, #8ED1C8);
    aspect-ratio: 3/4; display: flex; align-items: center; justify-content: center; font-size: 2rem;
    transform: rotate(5deg);
  }
  .book-float-2 {
    width: 30%; bottom: 10%; left: -10%;
    background: linear-gradient(145deg, #487799, #4394AD);
    aspect-ratio: 3/4; display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
    transform: rotate(-6deg);
  }
  .stat-chip {
    position: absolute; background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px); border: 1px solid var(--border);
    border-radius: 14px; padding: .7rem 1.2rem;
    box-shadow: 0 8px 24px rgba(67,148,173,.16);
    display: flex; align-items: center; gap: .6rem; white-space: nowrap;
  }
  .stat-chip .num { font-weight: 700; font-size: 1.1rem; color: var(--deep); }
  .stat-chip .lbl { font-size: .72rem; color: var(--text-sec); }
  .chip1 { top: 6%; left: -5%; animation: float 6s ease-in-out infinite; }
  .chip2 { bottom: 12%; right: -8%; animation: float 6s 2s ease-in-out infinite; }

  @keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
  @keyframes fadeUp { from{opacity:0;transform:translateY(24px)} to{opacity:1;transform:translateY(0)} }

  /* ── Shared Section ── */
  .section { padding: 6rem 2rem; }
  .section-inner { max-width: 1200px; margin: auto; }
  .section-label {
    display: inline-block; background: rgba(67,148,173,.1);
    color: var(--deep); font-size: .75rem; font-weight: 700;
    letter-spacing: .1em; text-transform: uppercase;
    padding: .35rem .9rem; border-radius: 50px; margin-bottom: 1rem;
    border: 1px solid rgba(67,148,173,.24);
  }
  .section-title {
    font-family: 'DM Serif Display', serif;
    font-size: clamp(1.8rem, 3vw, 2.6rem); line-height: 1.2;
    color: var(--text-dark); margin-bottom: .8rem;
  }
  .section-sub { font-size: .97rem; color: var(--text-sec); line-height: 1.7; max-width: 560px; }
  .text-center .section-sub { margin: auto; }

  /* ── Features ── */
  #features { background: var(--soft-bg); }
  .feat-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem; margin-top: 3rem;
  }
  .feat-card {
    background: white; border: 1px solid var(--border);
    border-radius: 20px; padding: 2rem 1.6rem;
    box-shadow: 0 4px 20px rgba(67,148,173,.08);
    transition: transform .3s, box-shadow .3s;
    position: relative; overflow: hidden;
  }
  .feat-card::before {
    content:''; position:absolute; top:0;left:0;right:0;height:3px;
    background: linear-gradient(90deg, #8ED1C8, #4394AD, #487799);
    opacity: 0; transition: opacity .3s;
  }
  .feat-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(67,148,173,.18); }
  .feat-card:hover::before { opacity: 1; }
  .feat-icon {
    width: 52px; height: 52px; border-radius: 14px;
    background: linear-gradient(135deg, #8ED1C8, #4394AD);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; margin-bottom: 1.2rem;
    box-shadow: 0 4px 16px rgba(67,148,173,.28);
  }
  .feat-title { font-weight: 700; font-size: 1rem; color: var(--text-dark); margin-bottom: .4rem; }
  .feat-desc { font-size: .85rem; color: var(--text-sec); line-height: 1.65; }

  /* ── Katalog ── */
  #katalog { background: white; }
  .catalog-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem; margin-top: 3rem;
  }
  .book-card {
    background: white; border: 1px solid var(--border); border-radius: 20px;
    overflow: hidden; box-shadow: 0 4px 20px rgba(67,148,173,.08);
    transition: transform .3s, box-shadow .3s;
  }
  .book-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(67,148,173,.2); }
  .book-cover {
    height: 200px; position: relative; overflow: hidden;
    display: flex; align-items: center; justify-content: center; font-size: 4rem;
  }
  .book-cover-1 { background: linear-gradient(145deg, #2C4F6B, #487799); }
  .book-cover-2 { background: linear-gradient(145deg, #4394AD, #8ED1C8); }
  .book-cover-3 { background: linear-gradient(145deg, #487799, #4394AD); }
  .book-cover-4 { background: linear-gradient(145deg, #8ED1C8, #4394AD); }
  .book-cover::after {
    content:''; position:absolute;inset:0;
    background: linear-gradient(to top, rgba(0,0,0,.22) 0%, transparent 60%);
  }
  .cat-tag {
    position: absolute; top: 1rem; left: 1rem; z-index:1;
    background: rgba(255,255,255,.92); color: var(--deep);
    font-size: .7rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
    padding: .25rem .7rem; border-radius: 50px;
  }
  .book-info { padding: 1.3rem 1.4rem; }
  .book-title { font-weight: 700; font-size: .95rem; color: var(--text-dark); margin-bottom: .3rem; }
  .book-author { font-size: .8rem; color: var(--text-sec); margin-bottom: .8rem; }
  .book-footer { display: flex; align-items: center; justify-content: space-between; }
  .book-price { font-weight: 700; font-size: 1rem; color: var(--deep); }
  .btn-buy {
    font-size: .78rem; font-weight: 600; color: var(--deep);
    border: 1.5px solid var(--cyan); padding: .35rem .9rem; border-radius: 50px;
    cursor: pointer; transition: all .2s; background: transparent; text-decoration: none;
    display: inline-block;
  }
  .btn-buy:hover { background: linear-gradient(135deg,#4394AD,#487799); color: white; border-color: transparent; }

  /* ── Pricing ── */
  #pricing { background: var(--soft-bg); }
  .pricing-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem; margin-top: 3rem; align-items: start;
  }
  .price-card {
    background: white; border: 1px solid var(--border); border-radius: 24px;
    padding: 2.2rem 2rem; box-shadow: 0 4px 20px rgba(67,148,173,.08);
    transition: transform .3s, box-shadow .3s; position: relative; overflow: hidden;
  }
  .price-card::after {
    content:''; position:absolute; bottom:0;left:0;right:0;height:3px;
    background: linear-gradient(90deg, #8ED1C8, #4394AD, #487799);
    opacity: 0; transition: opacity .3s;
  }
  .price-card:hover { transform: translateY(-6px); box-shadow: 0 20px 56px rgba(67,148,173,.16); }
  .price-card:hover::after { opacity: 1; }
  .price-card.featured {
    border: 2px solid #4394AD;
    box-shadow: 0 8px 40px rgba(67,148,173,.26), 0 0 0 4px rgba(67,148,173,.08);
    background: linear-gradient(170deg, #ffffff 80%, #EBF6F8 100%);
  }
  .price-card.featured::after { opacity: 1; }
  .featured-badge {
    position: absolute; top: 1.2rem; right: 1.4rem;
    background: linear-gradient(135deg,#4394AD,#487799);
    color: white; font-size: .7rem; font-weight: 700; letter-spacing: .06em;
    text-transform: uppercase; padding: .3rem .8rem; border-radius: 50px;
  }
  .price-name { font-weight: 700; font-size: 1.05rem; color: var(--text-dark); margin-bottom: .5rem; }
  .price-amount {
    font-family: 'DM Serif Display', serif;
    font-size: 2.1rem; color: var(--deep); margin-bottom: 1.4rem; line-height: 1;
  }
  .price-amount span { font-family: 'Plus Jakarta Sans', sans-serif; font-size: .9rem; font-weight: 500; color: var(--text-sec); }
  .price-features { list-style: none; margin-bottom: 1.8rem; display: flex; flex-direction: column; gap: .7rem; }
  .price-features li {
    display: flex; align-items: center; gap: .65rem;
    font-size: .88rem; color: var(--text-sec);
  }
  .price-features li::before {
    content: '✓'; display: flex; align-items: center; justify-content: center;
    width: 20px; height: 20px; min-width: 20px;
    background: linear-gradient(135deg,#8ED1C8,#4394AD);
    color: #1A2E3B; font-size: .7rem; font-weight: 800;
    border-radius: 50%;
  }
  .btn-price {
    width: 100%; padding: .72rem; border-radius: 50px; font-weight: 600; font-size: .9rem;
    cursor: pointer; transition: all .2s; border: none;
    font-family: 'Plus Jakarta Sans', sans-serif;
  }
  .btn-price-outline {
    background: transparent; border: 1.5px solid var(--cyan); color: var(--deep);
  }
  .btn-price-outline:hover { background: rgba(67,148,173,.08); }
  .btn-price-fill {
    background: linear-gradient(135deg,#4394AD,#487799);
    color: white; box-shadow: 0 6px 20px rgba(67,148,173,.4);
  }
  .btn-price-fill:hover { box-shadow: 0 10px 28px rgba(67,148,173,.5); transform: translateY(-2px); }

  /* ── Testimoni ── */
  #testimoni { background: white; }
  .testi-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem; margin-top: 3rem;
  }
  .testi-card {
    background: var(--soft-bg); border: 1px solid var(--border); border-radius: 20px;
    padding: 1.8rem; box-shadow: 0 4px 16px rgba(67,148,173,.07);
    transition: transform .3s, box-shadow .3s;
  }
  .testi-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(67,148,173,.15); }
  .stars { color: #E8A838; font-size: .9rem; margin-bottom: .8rem; letter-spacing: 2px; }
  .testi-text { font-size: .88rem; color: var(--text-sec); line-height: 1.7; margin-bottom: 1.2rem; font-style: italic; }
  .testi-author { display: flex; align-items: center; gap: .8rem; }
  .avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg,#8ED1C8,#4394AD);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .9rem; color: #1A2E3B;
  }
  .author-name { font-weight: 700; font-size: .88rem; color: var(--text-dark); }
  .author-role { font-size: .75rem; color: var(--text-sec); }

  /* ── Form ── */
  #kontak { background: var(--soft-bg); }
  .form-wrapper {
    max-width: 680px; margin: 3rem auto 0;
    background: rgba(255,255,255,.85); backdrop-filter: blur(16px);
    border: 1px solid var(--border); border-radius: 28px;
    padding: 3rem 2.5rem;
    box-shadow: 0 8px 40px rgba(67,148,173,.12);
  }
  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
  .field { margin-bottom: 1.2rem; }
  .field label {
    display: block; font-size: .82rem; font-weight: 600; color: var(--text-dark);
    margin-bottom: .45rem; letter-spacing: .02em;
  }
  .field input, .field select {
    width: 100%; padding: .75rem 1rem;
    border: 1.5px solid var(--border); border-radius: 12px;
    font-family: 'Plus Jakarta Sans', sans-serif; font-size: .9rem; color: var(--text-dark);
    background: white; outline: none;
    transition: border-color .2s, box-shadow .2s;
    -webkit-appearance: none; appearance: none;
  }
  .field input:focus, .field select:focus {
    border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(67,148,173,.18);
  }
  .field input::placeholder { color: #94a3b8; }
  .select-wrap { position: relative; }
  .select-wrap::after {
    content: '▾'; position: absolute; right: 1rem; top: 50%;
    transform: translateY(-50%); color: var(--text-sec); pointer-events: none;
  }
  .btn-submit {
    width: 100%; padding: .85rem; border-radius: 50px; border: none;
    background: linear-gradient(135deg,#4394AD,#487799);
    color: white; font-size: .95rem; font-weight: 700; letter-spacing: .02em;
    cursor: pointer; transition: all .2s;
    box-shadow: 0 6px 24px rgba(67,148,173,.4);
    font-family: 'Plus Jakarta Sans', sans-serif;
    margin-top: .5rem;
  }
  .btn-submit:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(67,148,173,.5); }

  /* ── Footer ── */
  footer {
    background: linear-gradient(160deg, #1E3A52 0%, #487799 100%);
    color: rgba(255,255,255,.8); padding: 4rem 2rem 2rem;
  }
  .footer-inner { max-width: 1200px; margin: auto; }
  .footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 2.5rem; margin-bottom: 3rem;
  }
  .footer-logo {
    font-family: 'DM Serif Display', serif; font-size: 1.5rem;
    color: white; margin-bottom: .8rem;
  }
  .footer-logo span { font-style: italic; color: #8ED1C8; }
  .footer-desc { font-size: .84rem; line-height: 1.7; max-width: 280px; }
  .footer-h { font-weight: 700; font-size: .9rem; color: white; margin-bottom: 1rem; }
  .footer-links { list-style: none; display: flex; flex-direction: column; gap: .6rem; }
  .footer-links a { color: rgba(255,255,255,.62); font-size: .85rem; text-decoration: none; transition: color .2s; }
  .footer-links a:hover { color: #8ED1C8; }
  .footer-contact { display: flex; flex-direction: column; gap: .8rem; }
  .contact-item { display: flex; align-items: flex-start; gap: .6rem; font-size: .84rem; }
  .contact-item .icon { font-size: 1rem; margin-top: .1rem; min-width: 1rem; }
  .socials { display: flex; gap: .8rem; margin-top: 1.2rem; }
  .social-btn {
    width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.2);
    display: flex; align-items: center; justify-content: center; font-size: .9rem;
    color: white; text-decoration: none; transition: all .2s;
    background: rgba(255,255,255,.08);
  }
  .social-btn:hover { background: rgba(142,209,200,.22); border-color: #8ED1C8; }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,.12); padding-top: 1.5rem;
    display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
    font-size: .8rem; color: rgba(255,255,255,.42);
  }
  .footer-bottom a { color: rgba(142,209,200,.75); text-decoration: none; }

  /* ── Responsive ── */
  @media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-inner { grid-template-columns: 1fr; gap: 3rem; padding-top: 4rem; }
    .hero-visual { order: -1; }
    .hero-book-stack { max-width: 300px; }
  }
  @media (max-width: 768px) {
    .nav-links, .btn-cta { display: none; }
    #hamburger { display: flex; }
    #mobile-menu.open { display: flex; }
    .form-row { grid-template-columns: 1fr; }
    .hero-inner { padding: 3rem 0 2rem; }
    .chip1, .chip2 { display: none; }
    .hero-h1 { font-size: 2rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .book-float-1, .book-float-2 { display: none; }
  }
  @media (max-width: 480px) {
    .form-wrapper { padding: 2rem 1.4rem; }
    .pricing-grid { grid-template-columns: 1fr; }
  }

  /* ── Scroll Reveal ── */
  .reveal {
    opacity: 0; transform: translateY(28px);
    transition: opacity .7s ease, transform .7s ease;
  }
  .reveal.visible { opacity: 1; transform: translateY(0); }

  .book-logo{
  width:140px;
  height:auto;
  object-fit:contain;

  filter:
    drop-shadow(0 4px 10px rgba(0,0,0,.2))
    drop-shadow(0 0 20px rgba(255,255,255,.25));
  }

  .book-cover{
    height:320px;
    position:relative;
    overflow:hidden;
    padding:0;
  }

  .book-cover-img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:0.4s ease;
  }

  .book-card:hover .book-cover-img{
      transform:scale(1.05);
  }

  .loading-product,
  .empty-product{
      grid-column:1 / -1;
      background:white;
      border:1px solid var(--border);
      border-radius:20px;
      padding:2rem;
      text-align:center;
      color:var(--text-sec);
      box-shadow:0 4px 20px rgba(67,148,173,.08);
  }