:root{
  --bg:#05080b;
  --panel:#0b1116;
  --panel-2:#101920;
  --line:rgba(115,232,255,.16);
  --text:#f5f7f8;
  --muted:#96a6b0;
  --cyan:#55e6ff;
  --cyan-2:#00a7c7;
  --gold:#d5a858;
  --shadow:0 24px 80px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(circle at 20% 0%,rgba(0,177,210,.11),transparent 30%),
    radial-gradient(circle at 90% 20%,rgba(213,168,88,.08),transparent 25%),
    var(--bg);
  font-family:Montserrat,Arial,sans-serif;
  min-height:100vh;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{color:inherit}
.ambient{position:fixed;border-radius:50%;filter:blur(110px);pointer-events:none;z-index:-1}
.ambient-one{width:260px;height:260px;background:rgba(0,201,232,.13);left:-120px;top:32%}
.ambient-two{width:240px;height:240px;background:rgba(213,168,88,.10);right:-120px;top:70%}

.site-header{
  width:min(1220px,calc(100% - 36px));
  margin:18px auto 0;
  min-height:72px;
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 18px;
  border:1px solid var(--line);
  background:rgba(6,11,15,.78);
  backdrop-filter:blur(18px);
  border-radius:18px;
  position:sticky;top:12px;z-index:20;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  font:700 24px "Russo One",sans-serif;
  color:#001015;background:linear-gradient(135deg,var(--cyan),#c5f8ff);
  box-shadow:0 0 28px rgba(85,230,255,.25)
}
.brand b{display:block;font-family:"Russo One";letter-spacing:.06em}
.brand small{display:block;font-size:10px;letter-spacing:.34em;color:var(--cyan);margin-top:3px}
.nav{display:flex;gap:26px;color:#c9d3d8;font-size:14px;font-weight:600}
.nav a:hover{color:var(--cyan)}
.menu-toggle{display:none;background:none;border:0;font-size:26px}

main{width:min(1220px,calc(100% - 36px));margin:0 auto}
.hero{
  min-height:640px;
  display:grid;grid-template-columns:1.05fr .95fr;
  align-items:center;gap:54px;
  padding:78px 0 54px;
}
.eyebrow{
  display:inline-block;
  text-transform:uppercase;
  letter-spacing:.2em;
  font-size:11px;font-weight:800;color:var(--cyan);
}
h1,h2,h3{margin:0;font-family:"Russo One",Montserrat,sans-serif;font-weight:400}
h1{font-size:clamp(42px,6vw,78px);line-height:1.02;max-width:760px;margin-top:16px}
h2{font-size:clamp(30px,4vw,52px);line-height:1.08;margin-top:10px}
h3{font-size:20px;line-height:1.25}
.hero-copy>p{max-width:670px;color:#b7c2c8;line-height:1.8;font-size:16px;margin:26px 0 30px}
.hero-actions,.card-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  border:0;border-radius:12px;padding:14px 18px;
  font-weight:800;font-size:14px;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
  transition:.2s ease;min-height:48px;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--cyan),#83f0ff);color:#001319;box-shadow:0 12px 28px rgba(0,196,226,.18)}
.btn-ghost,.btn-secondary{border:1px solid var(--line);background:rgba(11,18,24,.68);color:#eaf7fa}
.btn-secondary{flex:1}
.hero-stack{height:510px;position:relative}
.hero-stack img{
  position:absolute;width:250px;height:390px;object-fit:cover;
  border-radius:18px;border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);transition:.3s;
}
.hero-stack img:nth-child(1){left:4%;top:60px;transform:rotate(-10deg)}
.hero-stack img:nth-child(2){left:32%;top:10px;z-index:2}
.hero-stack img:nth-child(3){right:0;top:76px;transform:rotate(10deg)}
.hero-stack:hover img:nth-child(1){transform:translateX(-12px) rotate(-13deg)}
.hero-stack:hover img:nth-child(3){transform:translateX(12px) rotate(13deg)}

.section{padding:86px 0}
.section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:34px}
.section-head>p{max-width:430px;color:var(--muted);line-height:1.7;margin:0;text-align:right}
.books-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.book-card{
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(15,24,31,.96),rgba(7,13,18,.96));
  border-radius:20px;overflow:hidden;
  box-shadow:0 14px 34px rgba(0,0,0,.22);
  transition:.25s ease;
}
.book-card:hover{transform:translateY(-7px);border-color:rgba(85,230,255,.42);box-shadow:0 20px 50px rgba(0,0,0,.36)}
.cover-wrap{height:390px;position:relative;background:#12191f;overflow:hidden}
.cover-wrap img{width:100%;height:100%;object-fit:cover;display:block;transition:.4s}
.book-card:hover .cover-wrap img{transform:scale(1.025)}
.age,.series{
  position:absolute;top:14px;padding:8px 10px;border-radius:9px;
  font-size:11px;font-weight:800;backdrop-filter:blur(12px)
}
.age{left:14px;background:rgba(2,8,12,.75);border:1px solid rgba(255,255,255,.14)}
.series{right:14px;background:rgba(85,230,255,.90);color:#001319}
.series.standalone{background:rgba(213,168,88,.92);color:#181005}
.book-body{padding:20px}
.book-meta{color:var(--cyan);font-size:11px;line-height:1.5;text-transform:uppercase;letter-spacing:.1em;margin-bottom:10px}
.book-body h3{min-height:50px}
.price-line{color:#9fb0b9;margin:18px 0}.price-line b{color:#fff;font-size:18px}

.author-edition{
  margin:34px 0 70px;padding:54px;
  border:1px solid rgba(85,230,255,.22);
  background:
   linear-gradient(120deg,rgba(0,164,194,.10),transparent 40%),
   linear-gradient(180deg,#0c141a,#091015);
  border-radius:26px;box-shadow:var(--shadow)
}
.author-copy{max-width:760px}.author-copy p{color:#b5c0c6;line-height:1.8;font-size:16px}
.benefits{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:34px 0}
.benefits>div{padding:22px;border:1px solid var(--line);border-radius:16px;background:rgba(0,0,0,.14)}
.benefits span{color:var(--cyan);font-weight:800;font-size:12px}
.benefits b,.benefits small{display:block}.benefits b{margin:14px 0 7px}.benefits small{color:var(--muted);line-height:1.5}
.notice{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:24px;background:rgba(85,230,255,.07);border:1px solid rgba(85,230,255,.16);border-radius:18px}
.notice p{margin:8px 0 0;color:#aebbc2;line-height:1.65;max-width:780px}

.purchase-options{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.option{padding:34px;border-radius:20px;border:1px solid var(--line);background:var(--panel)}
.option.featured{background:linear-gradient(135deg,rgba(0,167,199,.18),rgba(13,21,27,.96));border-color:rgba(85,230,255,.35)}
.option-number{color:var(--cyan);font-weight:800}.option h3{font-size:27px;margin:18px 0 12px}.option p{color:var(--muted);line-height:1.75}

footer{
  width:min(1220px,calc(100% - 36px));margin:30px auto 22px;
  border-top:1px solid var(--line);padding:28px 0;
  display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px
}

.modal{position:fixed;inset:0;display:none;z-index:100}
.modal.active{display:block}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,3,5,.78);backdrop-filter:blur(10px)}
.modal-dialog{
  position:relative;z-index:1;width:min(900px,calc(100% - 28px));max-height:calc(100vh - 44px);
  margin:22px auto;overflow:auto;
  display:grid;grid-template-columns:310px 1fr;
  background:#0b1218;border:1px solid rgba(85,230,255,.25);
  border-radius:22px;box-shadow:0 40px 120px #000
}
.buy-dialog,.form-dialog{display:block;width:min(760px,calc(100% - 28px))}
.modal-cover img{width:100%;height:100%;min-height:540px;object-fit:cover;display:block}
.modal-content{padding:42px}.modal-content.full{padding:38px}
.modal-content h2{font-size:38px;margin:10px 0 20px}
.modal-content p,.modal-content li{color:#b2bec5;line-height:1.75}
.modal-close{
  position:absolute;right:13px;top:12px;z-index:3;
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line);
  background:rgba(4,9,13,.8);font-size:27px;cursor:pointer
}
.market-list{display:grid;gap:10px;margin:26px 0}
.market-list a{padding:18px;border:1px solid var(--line);border-radius:14px;display:grid;grid-template-columns:1fr auto;gap:5px 16px;background:#0e171d}
.market-list span{font-weight:800}.market-list small{color:var(--muted)}.market-list b{grid-column:2;grid-row:1/3;align-self:center;color:var(--cyan)}
.author-buy{display:flex;justify-content:space-between;gap:22px;align-items:center;border-top:1px solid var(--line);padding-top:24px}
.author-buy p{margin:7px 0 0}
.selected-book{font-weight:700;color:#fff!important}

form{display:grid;gap:15px;margin-top:24px}
label{display:grid;gap:8px;color:#dce5e9;font-size:13px;font-weight:700}
input,select,textarea{
  width:100%;border:1px solid var(--line);background:#0e171d;color:#fff;
  border-radius:12px;padding:14px;outline:none
}
input:focus,select:focus,textarea:focus{border-color:var(--cyan)}
.checkbox{display:flex;grid-template-columns:auto 1fr;align-items:center}.checkbox input{width:18px;height:18px}
.toast{
  position:fixed;left:50%;bottom:20px;transform:translate(-50%,30px);
  padding:14px 20px;background:#dffaff;color:#001319;border-radius:12px;
  font-weight:800;opacity:0;pointer-events:none;transition:.25s;z-index:200
}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media(max-width:1020px){
  .hero{grid-template-columns:1fr;padding-top:60px}.hero-stack{height:460px;max-width:620px;margin:auto;width:100%}
  .books-grid{grid-template-columns:repeat(2,1fr)}
  .benefits{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:720px){
  .site-header{width:calc(100% - 20px);top:8px;margin-top:8px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:78px;left:0;right:0;flex-direction:column;padding:18px;background:#091117;border:1px solid var(--line);border-radius:16px}.nav.open{display:flex}
  main{width:calc(100% - 24px)}
  .hero{min-height:auto;padding:52px 0 28px;gap:30px}
  h1{font-size:41px}.hero-stack{height:350px}.hero-stack img{width:172px;height:280px}.hero-stack img:nth-child(1){left:2%;top:45px}.hero-stack img:nth-child(2){left:27%;top:0}.hero-stack img:nth-child(3){right:0;top:52px}
  .section{padding:58px 0}.section-head{align-items:start;flex-direction:column}.section-head>p{text-align:left}
  .books-grid{grid-template-columns:1fr;gap:18px}.cover-wrap{height:520px}
  .author-edition{padding:28px;margin-left:-2px;margin-right:-2px}.benefits{grid-template-columns:1fr}.notice,.author-buy{align-items:stretch;flex-direction:column}
  .purchase-options{grid-template-columns:1fr}
  footer{flex-direction:column;align-items:flex-start}
  .modal-dialog{grid-template-columns:1fr}.modal-cover{height:300px}.modal-cover img{min-height:0;height:300px}.modal-content{padding:28px}.modal-content h2{font-size:30px}
}
@media(max-width:430px){
  .hero-stack{height:300px}.hero-stack img{width:145px;height:235px}.cover-wrap{height:445px}
  .hero-actions .btn,.card-actions .btn{width:100%}
}

.hp-field{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;opacity:0!important}
.form-status{min-height:20px;margin:0;font-size:13px;line-height:1.5}
.form-status.success{color:#75efad}
.form-status.error{color:#ff9191}
.submit-order:disabled{opacity:.55;cursor:wait;transform:none}
.order-number{display:block;margin-top:7px;font-size:15px}