:root{
  --bg:#ffffff;
  --muted:#f4f6f8;
  --text:#0f172a;
  --sub:#334155;
  --brand:#0b5bd3;
  --border:#e2e8f0;
  --shadow: 0 10px 25px rgba(2,6,23,.08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.9;
}

a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 16px}

.header{
  position:sticky;top:0;z-index:10;
  background:rgba(255,255,255,.9);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--border);
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:10px 0;
}

.brand{display:flex;align-items:center;gap:10px;min-width:230px}
.brand__logo{width:54px;height:54px;object-fit:contain}
.brand__text strong{display:block;font-size:14px;letter-spacing:.5px}
.brand__text span{display:block;font-size:12px;color:var(--sub)}

.nav{display:flex;flex-wrap:wrap;gap:10px}
.nav a{font-size:14px;color:var(--sub);padding:6px 10px;border-radius:10px}
.nav a:hover{background:var(--muted);color:var(--text)}

.lang-links{
  display:flex;
  gap:6px;
  align-items:center;
  padding:6px;
  border:1px solid var(--border);
  border-radius:14px;
  background:#fff;
}
.lang-link{
  border:1px solid var(--border);
  background:#fff;
  border-radius:10px;
  padding:6px 10px;
  font-weight:800;
  cursor:pointer;
  font-size:12px;
}
.lang-link:hover{background:var(--muted)}
.lang-link.is-active{
  background:var(--brand);
  color:#fff;
  border-color:var(--brand);
}

.hero{padding:42px 0;background:linear-gradient(180deg,#ffffff 0%, #f8fafc 100%)}
.hero__inner{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
.hero__content h1{margin:0 0 10px;font-size:28px}
.hero__content p{margin:0 0 18px;color:var(--sub)}
.hero__cta{display:flex;gap:10px;flex-wrap:wrap}

.hero__card{
  background:#fff;border:1px solid var(--border);border-radius:16px;
  padding:16px;box-shadow:var(--shadow)
}
.hero__card h2{margin:0 0 8px;font-size:18px}
.hero__card p{margin:0;color:var(--sub)}

.section{padding:46px 0}
.section--muted{background:var(--muted)}
.section h2{margin:0 0 14px;font-size:22px}
.section p{margin:0 0 12px;color:var(--sub)}

.grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
}
.tile{
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:14px;box-shadow: 0 6px 18px rgba(2,6,23,.05);
  color:var(--text);
}

/* CEO */
.ceo{
  display:grid;
  grid-template-columns: 220px 1fr;
  gap:24px;
  align-items:center;
}
.ceo__image img{
  width:100%;
  border-radius:18px;
  border:1px solid var(--border);
  box-shadow: var(--shadow);
}
.ceo__content h3{
  margin:8px 0 4px;
  font-size:20px;
}
.ceo__title{
  color:var(--sub);
  font-weight:800;
  margin-bottom:12px;
}


/* Resources */
.resources{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:18px;
}
.resource-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px;
  box-shadow:var(--shadow);
}
.resource-card--highlight{
  border-color:#bfdbfe;
  background:linear-gradient(180deg,#ffffff 0%,#eff6ff 100%);
}
.resource-card__badge{
  display:inline-flex;
  align-items:center;
  margin-bottom:10px;
  padding:4px 10px;
  border-radius:999px;
  background:var(--muted);
  color:var(--brand);
  font-size:12px;
  font-weight:800;
}
.resource-card h3{
  margin:0 0 8px;
  font-size:18px;
}
.resource-card p{
  margin-bottom:16px;
}


.book-cover{
  width:100%;
  max-height:260px;
  object-fit:cover;
  border-radius:14px;
  border:1px solid var(--border);
  margin:4px 0 14px;
  background:var(--muted);
}
.resource-card__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.resource-card__actions .btn{flex:1 1 170px}

/* Contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start}
.contact__box{
  background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px;
  box-shadow:var(--shadow);
}
.contact__list{list-style:none;padding:0;margin:0}
.contact__list li{display:flex;gap:10px;align-items:baseline;border-bottom:1px dashed var(--border);padding:10px 0}
.contact__list li:last-child{border-bottom:none}
.contact__list span{min-width:90px;color:var(--sub)}
.contact__list em{color:var(--sub);font-style:normal}

label{display:block;margin:10px 0;color:var(--sub);font-size:14px}
input,textarea{
  width:100%;margin-top:6px;padding:10px 12px;border-radius:12px;border:1px solid var(--border);
  font:inherit;outline:none;background:#fff
}
input:focus,textarea:focus{border-color:#93c5fd;box-shadow:0 0 0 4px rgba(59,130,246,.12)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;border-radius:12px;border:1px solid var(--border);
  font-weight:800;cursor:pointer
}
.btn--primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn--primary:hover{filter:brightness(.95)}
.btn--ghost{background:#fff}
.btn--ghost:hover{background:var(--muted)}

.footer{border-top:1px solid var(--border);padding:18px 0}
.footer__inner{display:flex;gap:10px;align-items:center;justify-content:center;color:var(--sub);font-size:14px}
.footer__sep{opacity:.5}

.hint{color:var(--sub);opacity:.85;margin-top:10px;font-size:12px}

@media (max-width: 900px){
  .header__inner{flex-wrap:wrap}
  .brand{min-width:unset}
  .hero__inner{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .resources{grid-template-columns:1fr}
  .nav{justify-content:flex-start}
  .ceo{grid-template-columns:1fr;text-align:center}
  .ceo__image{max-width:240px;margin:0 auto}
}

.book-page{display:grid;grid-template-columns:360px 1fr;gap:28px;align-items:start}
.book-page__cover{background:#fff;border:1px solid var(--border);border-radius:18px;padding:14px;box-shadow:var(--shadow)}
.book-page__content{background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:var(--shadow)}
.book-page__content h1{margin-top:0}
@media (max-width:900px){.book-page{grid-template-columns:1fr}.book-page__cover{max-width:360px;margin:0 auto}}