/* BSF Publications - style drawn from the heron logo:
   midnight ground, heron blue, horizon-ice stripes, amber beak accent, condensed caps wordmark. */
:root{
  color-scheme:dark;
  --midnight:#020f22;--deep:#0a1a33;--raised:#0f2342;
  --heron:#2674c6;--heron-hi:#4a93dd;--ice:#a9ddf2;--teal:#6ab6c6;
  --beak:#e8a23a;--beak-ink:#1c1003;
  --text:#eef5fb;--muted:#9fb5cb;--line:rgba(169,221,242,.16);
  --shadow:0 14px 34px -16px rgba(0,0,0,.8);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--midnight);color:var(--text);font-family:Lato,"Segoe UI",system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,.caps{font-family:Oswald,"Arial Narrow",Impact,sans-serif;font-weight:600;letter-spacing:.02em;text-wrap:balance;line-height:1.15}
img{max-width:100%;display:block}
a{color:inherit}
a:focus-visible,button:focus-visible{outline:3px solid var(--beak);outline-offset:3px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px 64px}

/* Striped horizon sun, the logo's signature */
.sun{position:absolute;border-radius:50%;pointer-events:none;
  background:
    linear-gradient(180deg,#fff 0 38%,transparent 38%),
    repeating-linear-gradient(180deg,var(--ice) 0 7px,transparent 7px 13px);
  -webkit-mask:linear-gradient(180deg,#000 55%,transparent 92%);mask:linear-gradient(180deg,#000 55%,transparent 92%)}

/* Home hero */
.hero{position:relative;overflow:hidden;padding:56px 20px 48px;border-bottom:1px solid var(--line);
  background:radial-gradient(120% 90% at 50% 0%,#0d2a52 0%,var(--midnight) 70%)}
.hero .sun{width:420px;height:420px;right:-60px;top:-70px;opacity:.16}
.hero-inner{position:relative;max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:32px;flex-wrap:wrap}
.logo{width:150px;height:auto;border-radius:18px;box-shadow:var(--shadow)}
.hero h1{margin:0;font-size:clamp(40px,8vw,76px);font-weight:700;text-transform:uppercase;letter-spacing:.04em;line-height:1}
.hero h1 span{display:block;font-size:.34em;letter-spacing:.32em;color:var(--ice);margin-top:8px;font-weight:500}
.hero p{margin:14px 0 0;max-width:46ch;color:var(--muted);font-size:17px}

.quicknav{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;display:flex;gap:8px;overflow-x:auto;padding:12px 20px;
  background:rgba(2,15,34,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.quicknav a{flex:none;text-decoration:none;font-family:Oswald,sans-serif;font-size:14px;letter-spacing:.08em;text-transform:uppercase;
  padding:7px 14px;border-radius:999px;color:var(--muted);border:1px solid var(--line)}
.quicknav a:hover{color:var(--ice);border-color:var(--ice)}

.shelf{padding-top:44px;scroll-margin-top:64px}
.shelf-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;padding-bottom:14px;margin-bottom:22px;
  border-bottom:2px solid transparent;border-image:repeating-linear-gradient(90deg,var(--ice) 0 18px,transparent 18px 26px) 1}
.shelf-head h2{margin:0;font-size:28px;text-transform:uppercase;letter-spacing:.06em}
.shelf-head p{margin:0;color:var(--muted);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:22px}
.card{display:flex;flex-direction:column;text-decoration:none;background:var(--deep);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:transform .18s ease,border-color .18s ease}
.card:hover{transform:translateY(-4px);border-color:var(--heron-hi)}
.card-cover{aspect-ratio:.77;background:var(--raised)}
.card-cover img{width:100%;height:100%;object-fit:cover}
.card-body{padding:12px 14px 14px;display:flex;flex-direction:column;gap:4px;flex:1}
.card-body h3{margin:0;font-size:17px;font-weight:500}
.card-body p{margin:0;font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-cta{margin-top:auto;padding-top:8px;font-family:Oswald,sans-serif;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--beak)}
@media (max-width:460px){.grid{grid-template-columns:repeat(2,1fr);gap:12px}.logo{width:110px}}

/* Book page */
.topbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;display:flex;align-items:center;gap:14px;padding:10px 20px;
  background:rgba(2,15,34,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .brand{font-family:Oswald,sans-serif;letter-spacing:.2em;text-transform:uppercase;font-size:14px;color:var(--muted)}
.btn-home,.btn-buy{display:inline-flex;align-items:center;gap:8px;text-decoration:none;cursor:pointer;border:0;
  font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.1em;border-radius:999px}
.btn-home{font-size:14px;padding:9px 18px;background:var(--heron);color:#fff}
.btn-home:hover{background:var(--heron-hi)}
.btn-buy{font-size:17px;padding:13px 28px;background:var(--beak);color:var(--beak-ink);font-weight:600;box-shadow:var(--shadow)}
.btn-buy:hover{filter:brightness(1.08)}
.book-top{position:relative;display:grid;grid-template-columns:minmax(0,360px) 1fr;gap:48px;padding-top:40px;align-items:start}
.book-cover{position:relative}
.book-cover .sun{width:120%;aspect-ratio:1;left:-10%;top:-12%;opacity:.12}
.book-cover img{position:relative;width:100%;border-radius:12px;box-shadow:var(--shadow)}
.eyebrow{font-family:Oswald,sans-serif;font-size:13px;letter-spacing:.24em;text-transform:uppercase;color:var(--teal)}
.book-info h1{font-size:clamp(30px,4.6vw,46px);margin:6px 0 6px;font-weight:600}
.subtitle{font-size:18px;color:var(--ice);margin:0 0 10px}
.meta{font-size:14px;color:var(--muted);margin-bottom:18px}
.desc{margin-bottom:28px;max-width:62ch}
.desc p{margin:0 0 12px}
.muted{color:var(--muted);font-style:italic}
.inside{margin-top:56px}
.inside h2{font-size:28px;margin:0 0 18px;text-transform:uppercase;letter-spacing:.06em}
.samples{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:18px}
.thumb{position:relative;padding:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;cursor:zoom-in;aspect-ratio:.77}
.thumb img{width:100%;height:100%;object-fit:contain;padding:6px}
.thumb.cover-tile img{object-fit:cover;padding:0}
.thumb.brand-tile{background:var(--midnight)}
.thumb.brand-tile img{object-fit:contain;padding:14px}
.thumb .tag{position:absolute;left:8px;bottom:8px;font-family:Oswald,sans-serif;font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  background:rgba(2,15,34,.85);color:var(--ice);padding:3px 8px;border-radius:999px}
.thumb.placeholder{cursor:default;display:flex;align-items:center;justify-content:center;text-align:center;color:var(--muted);font-size:13px;
  background:repeating-linear-gradient(180deg,var(--deep) 0 9px,var(--raised) 9px 16px)}
.bottom-nav{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;margin-top:52px;padding-top:24px;border-top:1px solid var(--line)}
dialog.lightbox{border:0;padding:0;background:transparent;max-width:94vw;max-height:94vh}
dialog.lightbox::backdrop{background:rgba(2,8,20,.9)}
dialog.lightbox img{max-width:94vw;max-height:90vh;border-radius:8px;background:#fff}
dialog.lightbox .close{position:fixed;top:14px;right:18px;font-size:34px;color:#fff;background:none;border:0;cursor:pointer}
@media (max-width:780px){
  .book-top{grid-template-columns:1fr;gap:26px}
  .book-cover{max-width:300px;margin:0 auto}
  .samples{grid-template-columns:repeat(2,1fr);gap:12px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.site-footer{max-width:1120px;margin:0 auto;padding:28px 20px 40px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.site-footer span:last-child{text-align:right}
.footer-logo{width:84px;height:auto;border-radius:12px}
@media (max-width:520px){.site-footer{grid-template-columns:1fr;justify-items:center;text-align:center}.site-footer span:last-child{text-align:center}.footer-logo{order:-1}}