:root {
  --bg: #070709;
  --panel: #0d0d12;
  --panel-2: #111116;
  --text: #f5f5f7;
  --muted: #c2c0c9;
  --purple: #8d42d8;
  --purple-2: #b36cff;
  --line: rgba(170, 92, 235, 0.42);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 12%, rgba(101, 39, 140, .13), transparent 28rem),
    var(--bg);
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(4, 4, 6, .94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(162, 74, 219, .28);
}

.nav-wrap {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand img { width: 230px; max-height: 78px; object-fit: contain; }
.nav { display: flex; align-items: center; gap: 34px; font-weight: 700; font-size: 14px; letter-spacing: .08em; }
.nav a { opacity: .88; padding: 29px 0 24px; border-bottom: 3px solid transparent; }
.nav a:hover, .nav a.active { opacity: 1; border-color: var(--purple); }
.nav-actions { display: flex; gap: 16px; font-size: 21px; }
.menu-toggle { display: none; background: none; border: 0; color: #fff; font-size: 26px; }

.hero {
  min-height: 570px;
  display: grid;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(2,2,5,.96) 0%, rgba(3,3,6,.78) 30%, rgba(3,3,6,.22) 64%, rgba(3,3,6,.25) 100%),
    url('assets/hero.jpg') center / cover no-repeat;
}
.hero::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 120px;
  background: linear-gradient(transparent, var(--bg));
  pointer-events: none;
}
.hero-inner { width: min(var(--max), calc(100% - 36px)); margin: 0 auto; position: relative; z-index: 2; }
.hero-copy { max-width: 550px; padding: 52px 0 84px; }
.eyebrow { color: var(--purple-2); text-transform: uppercase; font-weight: 800; letter-spacing: .18em; font-size: 13px; }
.hero h1, .section-title, .page-hero h1 {
  font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin: 0;
}
.hero h1 { font-size: clamp(56px, 8vw, 104px); line-height: .88; text-shadow: 0 4px 24px rgba(0,0,0,.6); }
.hero h1 span { display: block; color: var(--purple-2); font-size: .53em; letter-spacing: .22em; margin-top: 18px; }
.hero-rule { width: 360px; max-width: 80%; height: 3px; background: linear-gradient(90deg, var(--purple-2), transparent); margin: 22px 0; }
.hero h2 { text-transform: uppercase; font-size: 18px; letter-spacing: .08em; margin: 0 0 10px; }
.hero p { max-width: 520px; color: #dddbe3; font-size: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  padding: 13px 20px;
  border: 1px solid var(--purple);
  background: linear-gradient(180deg, #9748dc, #6f2cad);
  color: #fff;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 800;
  font-size: 13px;
  transition: .2s ease;
  box-shadow: 0 0 20px rgba(129, 50, 199, .15);
}
.btn:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 10px 26px rgba(129, 50, 199, .25); }
.btn.secondary { background: transparent; }

.section { padding: 58px 0; }
.container { width: min(var(--max), calc(100% - 36px)); margin: 0 auto; }
.section-head { text-align: center; margin-bottom: 30px; }
.section-title { font-size: clamp(34px, 5vw, 56px); }
.section-head p { color: var(--muted); margin: 6px auto 0; max-width: 700px; }
.star-rule { width: 160px; height: 2px; background: var(--purple); margin: 10px auto 12px; position: relative; }
.star-rule::after { content: '★'; color: var(--purple-2); background: var(--bg); padding: 0 8px; position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); font-size: 11px; }

.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.category-card { background: #0b0b0e; border: 1px solid rgba(255,255,255,.06); transition: .2s ease; overflow: hidden; }
.category-card:hover { transform: translateY(-5px); border-color: var(--line); box-shadow: 0 14px 34px rgba(0,0,0,.35); }
.category-card img { width: 100%; aspect-ratio: 16/8.5; object-fit: cover; }
.category-card .body { padding: 13px 14px 17px; text-align: center; }
.category-card h3 { text-transform: uppercase; margin: 0 0 8px; font-size: 15px; letter-spacing: .08em; }
.category-card .btn { padding: 8px 14px; margin: 0; background: transparent; }

.book-feature {
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255,255,255,.05);
  border-bottom: 1px solid rgba(255,255,255,.05);
  background:
    linear-gradient(90deg, #1a1023 0%, rgba(24,11,35,.94) 47%, rgba(26,14,38,.66) 100%),
    url('assets/book_bg.jpg') right center / cover no-repeat;
}
.book-grid { min-height: 340px; display: grid; grid-template-columns: 245px 1fr; gap: 34px; align-items: center; }
.book-cover { filter: drop-shadow(0 18px 28px rgba(0,0,0,.5)); }
.book-copy h2 { font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif; text-transform: uppercase; letter-spacing: .06em; font-size: clamp(31px, 4vw, 50px); line-height: 1.02; margin: 6px 0 10px; }
.book-copy p { max-width: 690px; color: #e0dce5; }

.perks { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid rgba(255,255,255,.08); }
.perk { padding: 24px 18px; display: flex; gap: 14px; align-items: center; border-right: 1px solid rgba(255,255,255,.06); }
.perk:last-child { border-right: 0; }
.perk-icon { width: 50px; height: 50px; border: 2px solid var(--purple); color: var(--purple-2); display: grid; place-items: center; border-radius: 14px; font-size: 24px; flex: 0 0 auto; }
.perk strong { display: block; text-transform: uppercase; font-size: 12px; letter-spacing: .06em; }
.perk span { display: block; color: #b6b3bd; font-size: 12px; margin-top: 3px; }

.page-hero { padding: 86px 0 64px; background: linear-gradient(120deg, rgba(111,44,173,.25), transparent 55%), #0b0b0f; border-bottom: 1px solid rgba(255,255,255,.06); }
.page-hero h1 { font-size: clamp(48px, 8vw, 90px); }
.page-hero p { color: var(--muted); max-width: 720px; }
.content-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 38px; }
.panel { padding: 26px; background: var(--panel); border: 1px solid rgba(255,255,255,.07); }
.panel h2 { margin-top: 0; }
.print-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product { background: var(--panel); border: 1px solid rgba(255,255,255,.07); overflow: hidden; }
.product img { aspect-ratio: 4/3; width: 100%; object-fit: cover; }
.product .body { padding: 18px; }
.product h3 { margin: 0 0 6px; }
.product p { color: var(--muted); font-size: 14px; }
.notice { padding: 16px 18px; border-left: 3px solid var(--purple); background: rgba(125,52,182,.1); color: #ddd8e5; }

footer { padding: 22px 0 28px; background: #050507; }
.footer-row { display: flex; justify-content: space-between; gap: 18px; color: #a8a5ae; font-size: 12px; }
.footer-links { display: flex; gap: 16px; }

@media (max-width: 920px) {
  .nav { position: absolute; top: 82px; left: 0; right: 0; display: none; flex-direction: column; gap: 0; background: #08080b; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav.open { display: flex; }
  .nav a { padding: 16px 24px; width: 100%; text-align: center; border-bottom-width: 1px; }
  .menu-toggle { display: block; }
  .nav-actions { display: none; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .perks { grid-template-columns: repeat(2, 1fr); }
  .book-grid { grid-template-columns: 180px 1fr; }
  .print-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .nav-wrap { width: min(100% - 22px, var(--max)); min-height: 70px; }
  .brand img { width: 180px; max-height: 66px; }
  .nav { top: 70px; }
  .hero { min-height: 650px; background-position: 58% center; }
  .hero-copy { padding: 58px 0 110px; }
  .hero h1 { font-size: 56px; }
  .hero h1 span { font-size: .48em; letter-spacing: .16em; }
  .category-grid, .print-grid, .perks { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: 1fr; text-align: center; padding: 34px 0; }
  .book-cover { max-width: 230px; margin: 0 auto; }
  .book-copy p { margin-left: auto; margin-right: auto; }
  .perk { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.06); }
  .footer-row { flex-direction: column; text-align: center; align-items: center; }
}