:root{
  --bg:#f6f7fb;
  --surface:#ffffff;
  --surface2:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --line:rgba(15,23,42,.10);
  --brand:#ef4444;
  --brand2:#a855f7;
  --brand3:#22c55e;
  --shadow: 0 18px 60px rgba(2,6,23,.10);
  --radius:18px;
}
html[data-theme="dark"]{
  --bg:#0b1020;
  --surface:rgba(15,23,49,.78);
  --surface2:rgba(7,10,21,.75);
  --text:#f4f7ff;
  --muted:#c6d0f7;
  --line:rgba(148,163,184,.18);
  --shadow: 0 18px 60px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial;color:var(--text);background:var(--bg)}
html[data-theme="dark"] body{
  background:
    radial-gradient(900px 520px at 80% -10%, rgba(168,85,247,.20), transparent 55%),
    radial-gradient(900px 520px at 10% 0%, rgba(239,68,68,.16), transparent 55%),
    linear-gradient(180deg, #070a15, #0b1020 45%, #070a15);
}
a{color:inherit}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 16px}

.topstrip{background:linear-gradient(90deg, rgba(239,68,68,.95), rgba(168,85,247,.90));color:#fff;font-size:12px}
.topstrip .inner{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:8px 0;flex-wrap:wrap}
.topstrip a{color:#fff;text-decoration:none;opacity:.95}
.topstrip a:hover{opacity:1}

.header{position:sticky;top:0;z-index:30;background:color-mix(in srgb, var(--surface2) 92%, transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header .inner{display:grid;grid-template-columns:240px 1fr 320px;gap:14px;align-items:center;padding:14px 0}
@media (max-width:980px){.header .inner{grid-template-columns:1fr;gap:10px}}

.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:900;letter-spacing:.2px}
.brand .mark{width:36px;height:36px;border-radius:14px;background:linear-gradient(135deg, rgba(239,68,68,.18), rgba(168,85,247,.14));border:1px solid rgba(239,68,68,.35);display:flex;align-items:center;justify-content:center}
.brand .name{line-height:1}
.brand .name span{display:block;font-size:12px;color:color-mix(in srgb, var(--text) 65%, transparent);font-weight:700;margin-top:2px}

.nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.nav a{text-decoration:none;color:color-mix(in srgb, var(--text) 88%, transparent);padding:9px 12px;border-radius:999px;border:1px solid transparent}
.nav a:hover{background:color-mix(in srgb, var(--text) 6%, transparent);border-color:color-mix(in srgb, var(--text) 10%, transparent)}

.searchbar{display:flex;gap:10px;justify-content:flex-end;align-items:center;flex-wrap:wrap}
.search{display:flex;align-items:center;background:color-mix(in srgb, var(--surface) 92%, transparent);border:1px solid var(--line);border-radius:999px;overflow:hidden;min-width:240px}
.search input{border:0;outline:none;background:transparent;color:var(--text);padding:10px 12px;width:100%}
.search button{border:0;background:rgba(239,68,68,.12);color:var(--text);padding:10px 12px;cursor:pointer}
.search button:hover{background:rgba(239,68,68,.18)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border-radius:999px;border:1px solid var(--line);text-decoration:none;background:color-mix(in srgb, var(--text) 4%, transparent);white-space:nowrap}
.btn:hover{background:color-mix(in srgb, var(--text) 6%, transparent)}
.btn-primary{background:linear-gradient(90deg, rgba(239,68,68,.22), rgba(168,85,247,.16));border-color:rgba(239,68,68,.35);box-shadow:0 14px 40px rgba(239,68,68,.10)}
.btn-icon{padding:10px 12px}

.hero{padding:18px 0 12px}
.slider{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg, rgba(168,85,247,.16), rgba(239,68,68,.10));box-shadow:var(--shadow);position:relative}
.slider-inner{display:grid;grid-template-columns:1.1fr 1fr;min-height:320px}
@media (max-width:980px){.slider-inner{grid-template-columns:1fr;min-height:auto}}

.slide-left{padding:22px;display:flex;gap:16px;align-items:center}
.bookshot{width:210px;max-width:40vw;border-radius:14px;border:1px solid color-mix(in srgb, var(--text) 12%, transparent);box-shadow:0 18px 50px rgba(0,0,0,.20);background:color-mix(in srgb, var(--text) 4%, transparent)}
.slide-copy .kicker{opacity:.9;font-weight:900;letter-spacing:.2px}
.slide-copy h1{margin:10px 0 10px;font-size:40px;line-height:1.05}
.slide-copy p{margin:0;color:color-mix(in srgb, var(--text) 82%, transparent);max-width:56ch}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border-radius:999px;background:color-mix(in srgb, var(--text) 6%, transparent);border:1px solid color-mix(in srgb, var(--text) 10%, transparent);font-size:13px;color:color-mix(in srgb, var(--text) 88%, transparent)}
.discount-badge{position:absolute;left:18px;bottom:18px;width:96px;height:96px;border-radius:999px;background:radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,.3) 35%, rgba(239,68,68,.95) 70%);color:#0b1020;display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:900;border:1px solid rgba(255,255,255,.24);box-shadow:0 18px 50px rgba(0,0,0,.25)}
.discount-badge small{font-size:12px;opacity:.9;font-weight:800}
.discount-badge strong{font-size:30px;line-height:1}
.slide-right{padding:22px;display:flex;align-items:center;justify-content:center}
.hero-card{width:100%;border-radius:var(--radius);border:1px solid color-mix(in srgb, var(--text) 12%, transparent);background:color-mix(in srgb, var(--surface) 86%, transparent);padding:18px}
.hero-card h3{margin:0 0 8px}
.hero-card ul{margin:0;padding-left:18px;color:color-mix(in srgb, var(--text) 82%, transparent)}
.hero-card li{margin:6px 0}

.slider-controls{position:absolute;right:12px;bottom:12px;display:flex;gap:8px;align-items:center}
.slider-controls .btn{background:rgba(255,255,255,.7);border-color:rgba(15,23,42,.10)}
html[data-theme="dark"] .slider-controls .btn{background:rgba(0,0,0,.25);border-color:rgba(255,255,255,.16)}
.dots{display:flex;gap:6px;align-items:center}
.dot{width:10px;height:10px;border-radius:999px;border:1px solid rgba(15,23,42,.20);background:rgba(255,255,255,.8);cursor:pointer}
html[data-theme="dark"] .dot{border-color:rgba(255,255,255,.22);background:rgba(0,0,0,.25)}
.dot[aria-current="true"]{width:18px;background:rgba(239,68,68,.85);border-color:rgba(239,68,68,.45)}

.section{padding:14px 0 22px}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:12px;flex-wrap:wrap}
.section-title h2{margin:0;font-size:20px}
.section-title .link{color:color-mix(in srgb, var(--text) 85%, transparent);text-decoration:none}
.section-title .link:hover{text-decoration:underline}
.divider{height:1px;background:var(--line);margin:12px 0}

.grid{display:grid;gap:14px}
.grid4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:980px){.grid4{grid-template-columns:repeat(2,1fr)}.grid3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.grid4,.grid3,.grid2{grid-template-columns:1fr}}

.card{background:color-mix(in srgb, var(--surface) 92%, transparent);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:0 10px 26px rgba(0,0,0,.08)}
html[data-theme="dark"] .card{box-shadow:0 10px 26px rgba(0,0,0,.18)}
.product-card{padding:12px}
.product-card .thumb{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:color-mix(in srgb, var(--text) 3%, transparent)}
.product-card h3{margin:10px 0 6px;font-size:16px}
.small{font-size:13px;color:color-mix(in srgb, var(--text) 72%, transparent)}
.price{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:8px 0 10px}
.price .now{font-weight:900}
.price .tag{font-size:12px;padding:6px 10px;border-radius:999px;background:rgba(239,68,68,.10);border:1px solid rgba(239,68,68,.20);color:color-mix(in srgb, var(--text) 90%, transparent)}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.actions .btn{padding:9px 12px}

.badge{display:inline-flex;gap:6px;align-items:center;padding:7px 10px;border:1px solid var(--line);border-radius:999px;color:color-mix(in srgb, var(--text) 72%, transparent);font-size:12px;background:color-mix(in srgb, var(--text) 4%, transparent)}

.site-footer{margin-top:18px;border-top:1px solid var(--line);background:color-mix(in srgb, var(--surface2) 92%, transparent);padding:24px 0}
.site-footer h4{margin:0 0 10px}
.site-footer p{margin:8px 0;color:color-mix(in srgb, var(--text) 72%, transparent)}
.site-footer a{text-decoration:none;color:color-mix(in srgb, var(--text) 84%, transparent)}
.site-footer a:hover{text-decoration:underline}

.wa-float{position:fixed;right:16px;bottom:16px;width:54px;height:54px;border-radius:999px;background:linear-gradient(135deg, rgba(34,197,94,.35), rgba(239,68,68,.12));border:1px solid rgba(34,197,94,.35);display:flex;align-items:center;justify-content:center;text-decoration:none;font-weight:900;box-shadow:0 18px 50px rgba(0,0,0,.18)}
html[data-theme="dark"] .wa-float{box-shadow:0 18px 50px rgba(0,0,0,.35)}

.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
input,textarea,select{width:100%;padding:10px;border-radius:12px;border:1px solid var(--line);background:color-mix(in srgb, var(--surface) 94%, transparent);color:var(--text)}
label{display:block;margin:10px 0 6px;color:color-mix(in srgb, var(--text) 72%, transparent)}
hr{border:none;border-top:1px solid var(--line);margin:16px 0}

/* Mobile navigation */
.menu-btn{display:none}
@media (max-width: 980px){
  .menu-btn{display:inline-flex}
  .nav-collapse{display:none;width:100%;justify-content:flex-start}
  .nav-collapse.is-open{display:flex}
  .nav-collapse a{padding:10px 12px}
  .searchbar{justify-content:flex-start}
  .search{min-width: 100%}
}

/* Small phones */
@media (max-width: 560px){
  .header .inner{padding:12px 0}
  .brand .name{font-size:14px}
  .searchbar{gap:8px}
  .btn{padding:10px 12px}
  .btn-icon{padding:10px 12px}
  .slider-inner{grid-template-columns:1fr}
  .slide-left{flex-direction:column;align-items:flex-start}
  .bookshot{width:100%;max-width:320px}
  .slide-copy h1{font-size:30px}
  .discount-badge{left:12px;bottom:12px;transform:scale(.85);transform-origin:left bottom}
  .slider-controls{right:10px;bottom:10px}
}

/* Ecommerce-style compact mobile header */
.wa-btn .wa-ico{font-size:16px;line-height:1}
.wa-btn .wa-label{font-weight:800}

.search-btn{display:none}
.search-collapse{display:flex}

@media (max-width: 980px){
  .header .inner{
    grid-template-columns: 1fr auto auto;
    align-items:center;
  }
  .brand .name span{display:none} /* hide subtitle on mobile */
  .searchbar{
    width:100%;
    order:4;
    justify-content:flex-start;
  }
  .search-btn{display:inline-flex}
  .search-collapse{
    display:none;
    width:100%;
  }
  .search-collapse.is-open{display:flex}
  .search{min-width: 0}
  .theme-btn [data-label]{display:none}
  .wa-btn .wa-label{display:none}
  .wa-btn{padding:10px 12px}
  .menu-btn{padding:10px 12px}
}

@media (max-width: 560px){
  .header .inner{
    grid-template-columns: 1fr auto auto;
    gap:10px;
  }
  .brand .name{font-size:14px}
  .nav-collapse a{width:100%} /* menu items stacked */
}

/* Discover-friendly author box */
.author-box{
  display:grid;
  grid-template-columns: 92px 1fr;
  gap:14px;
  padding:14px;
  border:1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
}
.author-avatar img{
  width:92px;height:92px;object-fit:cover;border-radius:22px;
  border:1px solid var(--line);
  background: color-mix(in srgb, var(--text) 3%, transparent);
}
@media (max-width:560px){
  .author-box{grid-template-columns:1fr}
  .author-avatar{display:flex;justify-content:flex-start}
}


/* v36.7 logo image header */
.brand-logo-img{height:44px;width:auto;display:block;object-fit:contain;border-radius:12px}
@media (max-width:480px){.brand-logo-img{height:36px}}

/* v37.2 mobile header fixes */
.icon-btn{width:40px;height:40px;border-radius:999px;border:1px solid rgba(0,0,0,.12);background:#fff;display:inline-flex;align-items:center;justify-content:center}
.navlinks{display:none}
.navlinks.open{display:flex}

@media (max-width: 520px){
  .topstrip{display:none}
  .nav-row{gap:10px}
  .nav-links{display:none}
  .navlinks{flex-direction:column;gap:8px;padding:10px 12px;border-top:1px solid rgba(0,0,0,.06)}
  .nav-actions{gap:8px}
  .nav-search{flex:1}
}