:root{--primary:#0b4d8a;--accent:#e08b2f;--muted:#667788;--bg:#ffffff;--card:#ffffff}
*{box-sizing:border-box}
body{margin:0;font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', Arial;color:#123;background:var(--bg);line-height:1.74}
.wrap{max-width:1100px;margin:0 auto;padding:20px}
.site-header{background:linear-gradient(90deg,var(--primary),#2b6aa0);color:#fff;position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;gap:12px;align-items:center}
.logo{height:56px}
.title{font-weight:800;letter-spacing:0.4px}
.small{font-size:13px;opacity:0.95}
.main-nav{display:flex;gap:14px;align-items:center}
.main-nav a{color:#fff;text-decoration:none;margin-left:6px;font-weight:600;padding:6px 8px;border-radius:6px}
.main-nav a:hover{background:rgba(255,255,255,0.06)}
.hamburger{display:none;background:transparent;border:0;color:#fff;padding:8px;border-radius:6px;font-size:22px}

/* layout sections */
.section{padding:18px 0}
.hero{display:flex;gap:18px;align-items:center;padding:28px 0;background:linear-gradient(180deg,rgba(11,77,138,0.03),rgba(0,0,0,0));border-radius:10px}
.hero-text{flex:1}
.hero-image img{width:100%;max-width:520px;border-radius:8px;box-shadow:0 10px 30px rgba(11,77,138,0.12)}
.lead{color:#264b6f}
.btn-primary{background:var(--accent);color:#ffffff;padding:10px 14px;border-radius:6px;text-decoration:none;font-weight:700}

/* cards */
.card{background:var(--card);border-radius:10px;padding:18px;box-shadow:0 6px 18px rgba(11,77,138,0.06)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.books{display:flex;gap:14px;flex-wrap:wrap}
.book{background:#fff;border-radius:8px;padding:12px;flex:1 1 260px;max-width:320px;box-shadow:0 6px 12px rgba(0,0,0,0.06)}
.book img{width:100%;height:180px;object-fit:cover;border-radius:6px}
.prices{display:flex;gap:10px;align-items:center}
.old{text-decoration:line-through;color:#888}
.new{color:var(--accent);font-weight:800}

/* footer */
.footer-grid{display:flex;justify-content:space-between;align-items:center;gap:12px}
.site-footer{background:#f9fbfd;padding:24px 0;margin-top:28px;border-top:1px solid #e6eef6}

/* about */
.about-grid{display:flex;gap:18px;align-items:flex-start}
.about-grid img{width:320px;border-radius:8px;box-shadow:0 10px 30px rgba(11,77,138,0.06)}

/* gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.gallery-grid img{width:100%;height:180px;object-fit:cover;border-radius:6px;cursor:pointer;transition:transform .18s}
.gallery-grid img:hover{transform:scale(1.03)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 420px;gap:18px}
.contact-grid input,.contact-grid textarea{width:100%;padding:14px;border-radius:6px;border:1px solid #e6edf3;margin-bottom:12px;display:block}

/* marathon form - vertical simple */
.marathon-section{background:linear-gradient(180deg,#fffefd,#f7f9fc);padding:24px;border-radius:12px;margin-top:22px;display:grid;grid-template-columns:1fr 420px;gap:20px;align-items:start}
.marathon-card{display:flex;gap:12px;align-items:center;background:var(--card);padding:12px;border-radius:8px;box-shadow:0 6px 14px rgba(0,0,0,0.04)}
.marathon-card img{width:86px;height:110px;object-fit:cover;border-radius:6px}
.marathon-form{background:white;padding:16px;border-radius:10px;box-shadow:0 8px 24px rgba(11,77,138,0.06)}

/* social icons */
.social-icons{display:flex;gap:10px;align-items:center}
.social-icons a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:6px;background:transparent;border:1px solid rgba(0,0,0,0.06);text-decoration:none;color:var(--primary)}
.social-icons svg{width:18px;height:18px;display:block}

/* lightbox */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,0.85);display:none;align-items:center;justify-content:center;z-index:200}
.lightbox img{max-width:90%;max-height:90%;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,0.6)}
.lightbox.visible{display:flex}
.lightbox .close{position:absolute;top:22px;right:22px;color:#fff;font-size:22px;background:transparent;border:0}

/* responsive */
@media(max-width:980px){.grid-3{grid-template-columns:1fr}.gallery-grid{grid-template-columns:repeat(2,1fr)}.hero{flex-direction:column}.hero-image img{width:100%}.marathon-section{grid-template-columns:1fr}} 
@media(max-width:620px){.main-nav{display:none}.hamburger{display:block}}