:root{
  --text:#111;
  --muted:#666;
  --accent:#0b3d91;
  --surface:#fff;
  --radius:10px;
  --gap:18px;
  font-family: "Inter", "Caladea", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color-scheme: light;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  color:var(--text);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  font-size:16px;
}

.container{max-width:1100px;margin:0 auto;padding:32px;}

.site-header{
  border-bottom:1px solid #e9e9e9;
  background:transparent;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.brand{display:flex;align-items:center;gap:12px}
.logo-mark{width:56px;height:56px;display:flex;align-items:center;justify-content:center}
.logo-mark img{width:48px;height:48px;display:block;object-fit:contain}
.site-title{font-size:18px;margin:0;font-weight:700;letter-spacing:.2px}
.site-sub{font-size:12px;margin:0;color:var(--muted)}

.main-nav{display:flex;align-items:center;gap:12px}
.nav-list{display:flex;gap:12px;list-style:none;padding:0;margin:0}
.nav-list a{color:var(--text);text-decoration:none;font-weight:600;font-size:14px}
.nav-toggle{display:none}

.hero{
  padding:44px 0;
}
.hero-inner{display:grid;grid-template-columns:1fr 360px;gap:28px;align-items:center}
.eyebrow{font-weight:700;color:var(--accent);margin:0 0 8px 0}
.lead{margin:0 0 18px 0;color:var(--muted);max-width:56ch}
.hero-actions{display:flex;gap:12px}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:8px;border:1px solid transparent;background:transparent;text-decoration:none;color:var(--text);cursor:pointer;font-weight:600
}
.btn.primary{background:var(--accent);color:#fff;border-color:rgba(0,0,0,0.03)}
.btn.ghost{border-color:#e6e6e6;background:transparent}

.hero-visual{display:flex;justify-content:center;align-items:center}
.cover-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%}
.cover{
  aspect-ratio:2/3;background:#f4f4f4;border-radius:8px;box-shadow:0 6px 18px rgba(10,10,10,0.06);display:flex;align-items:flex-end;padding:14px;color:#fff;font-weight:700
}
.cover .meta{font-size:12px;background:rgba(0,0,0,0.35);padding:6px 8px;border-radius:6px}

.about{padding:36px 0}
.about-inner{display:grid;grid-template-columns:1fr 320px;gap:28px}
.features{padding-left:18px;margin:8px 0}

.catalog{padding:28px 0}
.catalog-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.catalog-controls{display:flex;gap:12px;align-items:center}
.search input{padding:8px 10px;border-radius:8px;border:1px solid #e6e6e6}
select{padding:8px;border-radius:8px;border:1px solid #e6e6e6}

.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:18px}
.book{
  background:#fff;border-radius:10px;border:1px solid #f0f0f0;padding:12px;cursor:pointer;display:flex;flex-direction:column;gap:10px;transition:transform .16s ease,box-shadow .16s ease;
}
.book:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(10,10,10,0.06)}
.book-cover{aspect-ratio:2/3;border-radius:6px;overflow:hidden;display:flex;align-items:flex-end;padding:10px;color:#fff;font-weight:700}
.book-title{font-size:15px;margin:0}
.book-meta{font-size:13px;color:var(--muted)}

.empty-state{padding:28px;text-align:center;color:var(--muted)}

.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:60}
.modal[aria-hidden="false"]{display:flex}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,0.45)}
.modal-panel{position:relative;background:#fff;border-radius:12px;max-width:880px;width:94%;padding:22px;z-index:10;box-shadow:0 20px 60px rgba(10,10,10,0.12)}
.modal-close{position:absolute;right:12px;top:12px;border:0;background:transparent;font-size:22px;cursor:pointer}

.modal-body{display:grid;grid-template-columns:260px 1fr;gap:18px;align-items:start}
.modal-cover{border-radius:8px;overflow:hidden;min-height:320px;display:flex;align-items:flex-end;padding:12px;color:#fff;font-weight:700}
.modal-info h4{margin-top:0}
.muted{color:var(--muted);font-size:14px}

.contact{padding:36px 0}
.contact-form{max-width:720px}
.contact-form .row{display:flex;gap:12px}
.contact-form label{display:block;font-size:14px}
.contact-form input, .contact-form textarea{width:100%;padding:10px;border:1px solid #e6e6e6;border-radius:8px}

.form-actions{display:flex;gap:12px;align-items:center;margin-top:12px}

.site-footer{border-top:1px solid #efefef;padding:18px 0;margin-top:32px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px}

.small{padding:6px 8px;font-size:13px;border-radius:8px}
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:20px}
  .about-inner{grid-template-columns:1fr}
  .main-nav .nav-list{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{gap:8px}
  .cover-grid{grid-template-columns:repeat(3,1fr);width:70%}
  .modal-body{grid-template-columns:1fr}
}