:root{
  --bg:#0b0f17;
  --panel:#0f1624;
  --alt:#0d1320;
  --text:#e8eefc;
  --muted:#a7b3cc;
  --line: rgba(255,255,255,.10);
  --btn:#ffffff;
  --btnText:#0b0f17;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  background: radial-gradient(1000px 600px at 20% -10%, rgba(255,255,255,.08), transparent 60%),
              radial-gradient(800px 500px at 80% 0%, rgba(255,255,255,.06), transparent 55%),
              var(--bg);
  color:var(--text);
  line-height:1.6;
}

a{color:inherit;text-decoration:none}
.container{width:min(1100px, 92%); margin:0 auto}

.site-header{
  position:sticky; top:0; z-index:20;
  border-bottom:1px solid var(--line);
  background: rgba(11,15,23,.75);
  backdrop-filter: blur(10px);
}
.nav{display:flex; align-items:center; justify-content:space-between; padding:14px 0}
.brand{display:flex; gap:12px; align-items:baseline; flex-wrap:wrap}
.logo{font-weight:800; letter-spacing:.3px; font-size:18px}
.tagline{color:var(--muted); font-size:13px}

.menu{display:flex; gap:16px; align-items:center}
.menu a{color:var(--muted)}
.menu a:hover{color:var(--text)}

.hero{padding:56px 0 24px}
.hero-grid{
  display:grid;
  grid-template-columns: 1.3fr .8fr;
  gap:26px;
  align-items:stretch;
}
h1{font-size:44px; line-height:1.12; margin:0 0 12px}
.lead{font-size:18px; color:var(--muted); margin:0 0 18px}

.hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin:18px 0 22px}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 16px; border-radius:999px;
  background:var(--btn); color:var(--btnText);
  border:1px solid rgba(255,255,255,.18);
  box-shadow: var(--shadow);
  font-weight:700;
  cursor:pointer;
}
.btn:hover{transform: translateY(-1px)}
.btn:active{transform: translateY(0px)}
.btn-small{padding:9px 12px; font-size:14px}
.btn-ghost{
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow:none;
}
.btn-block{width:100%; border-radius:12px}

.trust{display:grid; grid-template-columns: repeat(3, 1fr); gap:12px; margin-top:10px}
.trust-card{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: 14px;
  padding:12px;
}
.trust-card strong{display:block; font-size:14px}
.trust-card span{display:block; color:var(--muted); font-size:13px}

.hero-panel .panel-card{
  height:100%;
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border-radius: var(--radius);
  padding:18px;
  box-shadow: var(--shadow);
}
.panel-card h3{margin:0 0 8px}
.panel-card p{margin:0 0 14px; color:var(--muted)}
.stack{display:grid; gap:10px}
.mini{display:grid; gap:8px; margin-top:14px; color:var(--muted); font-size:13px}

.section{padding:52px 0}
.section.alt{background: rgba(255,255,255,.02); border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
h2{font-size:30px; margin:0 0 10px}
.muted{color:var(--muted)}
.tiny{font-size:12px}

.grid.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
  margin-top:18px;
}
.card{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding:18px;
}
.card h3{margin:0 0 8px}
.card ul{margin:10px 0 0; padding-left:18px; color:var(--muted)}

.about-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:18px;
  align-items:start;
}
.quote{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding:18px;
}
.quote-text{font-size:18px; margin:0 0 10px}
.quote-by{margin:0; color:var(--muted)}

/* Books */
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.pill{
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-size: 13px;
}

.grid.books{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
  margin-top:18px;
}

.book-card{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  overflow:hidden;
  display:flex;
  flex-direction:column;
}

.book-cover{
  background: rgba(255,255,255,.02);
  border-bottom:1px solid var(--line);
  padding:14px;
}
.book-cover img{
  width:100%;
  height:auto;
  border-radius: 14px;
  display:block;
  box-shadow: var(--shadow);
}
.book-body{padding:16px}

.format-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
  margin-top:12px;
}
.format{
  border:1px solid var(--line);
  border-radius: 14px;
  padding:12px;
  background: rgba(255,255,255,.02);
}
.format-top{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
  margin-bottom:10px;
}
.price{
  font-size: 18px;
  font-weight: 800;
}

/* Form */
.form{
  margin-top:18px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  padding:18px;
}
.form-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:12px;
}
label{display:grid; gap:6px; font-weight:600}
input, select, textarea{
  padding:12px 12px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(11,15,23,.55);
  color: var(--text);
  outline:none;
}
input::placeholder, textarea::placeholder{color: rgba(167,179,204,.7)}
textarea{resize:vertical}

.form-actions{display:flex; gap:12px; align-items:center; justify-content:space-between; flex-wrap:wrap; margin-top:14px}

.note-box{
  margin-top:18px;
  border:1px dashed var(--line);
  border-radius: var(--radius);
  padding:14px;
  background: rgba(255,255,255,.02);
}

/* Footer */
.footer{
  border-top:1px solid var(--line);
  padding:22px 0;
  background: rgba(0,0,0,.12);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1fr auto 1fr;
  gap:14px;
  align-items:center;
}
.footer-links{display:flex; gap:14px; justify-content:center}
.footer-links a{color:var(--muted)}
.footer-links a:hover{color:var(--text)}
.footer-small{justify-self:end}

@media (max-width: 900px){
  h1{font-size:36px}
  .hero-grid{grid-template-columns:1fr}
  .trust{grid-template-columns:1fr}
  .grid.cards{grid-template-columns:1fr}
  .grid.books{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .format-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr; text-align:center}
  .footer-small{justify-self:center}
}